72 results on '"Jouni M"'
Search Results
2. Cannabinoid Receptor Type 1 in Parkinson's Disease : A Positron Emission Tomography Study with [F-18]FMPEP-d(2)
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Ajalin, Riikka M., Al-Abdulrasul, Haidar, Tuisku, Jouni M., Hirvonen, Jussi E. S., Vahlberg, Tero, Lahdenpohja, Salla, Rinne, Juha O., Brück, Anna E., Neurologian yksikkö, and HUS Neurocenter
- Subjects
MODEL ,dopaminergic medication ,CB1 receptor ,PET ,RIMONABANT ,Parkinson's disease ,BINDING ,3112 Neurosciences ,BRAIN ,DYSKINESIA ,ENDOCANNABINOID SYSTEM ,3124 Neurology and psychiatry ,ANTAGONIST - Abstract
Background The endocannabinoid system is a widespread neuromodulatory system affecting several biological functions and processes. High densities of type 1 cannabinoid (CB1) receptors and endocannabinoids are found in basal ganglia, which makes them an interesting target group for drug development in basal ganglia disorders such as Parkinson's disease (PD). Objective The aim of this study was to investigate CB1 receptors in PD with [F-18]FMPEP-d(2) positron emission tomography (PET) and the effect of dopaminergic medication on the [F-18]FMPEP-d(2) binding. Methods The data consisted of 16 subjects with PD and 10 healthy control subjects (HCs). All participants underwent a [F-18]FMPEP-d(2) high-resolution research tomograph PET examination for the quantitative assessment of cerebral binding to CB1 receptors. To investigate the effect of dopaminergic medication on the [F-18]FMPEP-d(2) binding, 15 subjects with PD underwent [F-18]FMPEP-d(2) PET twice, both on and off antiparkinsonian medication. Results [F-18]FMPEP-d(2) distribution volume was significantly lower in the off scan compared with the on scan in basal ganglia, thalamus, hippocampus, and amygdala (P < 0.05). Distribution volume was lower in subjects with PD off than in HCs globally (P < 0.05), but not higher than in HCs in any brain region. Conclusions Subjects with PD have lower CB1 receptor availability compared with HCs. PD medication increases CB1 receptor toward normal levels. (c) 2022 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society
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- 2022
3. Object-Oriented Implementation for the Dual Surface Minimisation Algorithm.
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Jouni M. Mykkänen, Mikko Itäranta, and Jussi Tohka
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- 2005
4. Cannabinoid Receptor Type 1 in Parkinson's Disease: A Positron Emission Tomography Study with [18 F] FMPEP ‐ d 2
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Ajalin, Riikka M., primary, Al‐Abdulrasul, Haidar, additional, Tuisku, Jouni M., additional, Hirvonen, Jussi E.S., additional, Vahlberg, Tero, additional, Lahdenpohja, Salla, additional, Rinne, Juha O., additional, and Brück, Anna E., additional
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- 2022
- Full Text
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5. Delineation of drain Structures from Positron Emission Tomography Images with Deformable Models.
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Jouni M. Mykkänen, Jussi Tohka, and Ulla Ruotsalainen
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- 2003
- Full Text
- View/download PDF
6. Cannabinoid Receptor Type 1 in Parkinson's Disease: A Positron Emission Tomography Study with [
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Riikka M, Ajalin, Haidar, Al-Abdulrasul, Jouni M, Tuisku, Jussi E S, Hirvonen, Tero, Vahlberg, Salla, Lahdenpohja, Juha O, Rinne, and Anna E, Brück
- Subjects
Antiparkinson Agents ,Receptor, Cannabinoid, CB1 ,Positron-Emission Tomography ,Brain ,Humans ,Parkinson Disease - Abstract
The endocannabinoid system is a widespread neuromodulatory system affecting several biological functions and processes. High densities of type 1 cannabinoid (CB1) receptors and endocannabinoids are found in basal ganglia, which makes them an interesting target group for drug development in basal ganglia disorders such as Parkinson's disease (PD).The aim of this study was to investigate CB1 receptors in PD with [The data consisted of 16 subjects with PD and 10 healthy control subjects (HCs). All participants underwent a [[Subjects with PD have lower CB1 receptor availability compared with HCs. PD medication increases CB1 receptor toward normal levels. © 2022 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
- Published
- 2022
7. Author Correction: Genome-wide association analyses identify new Brugada syndrome risk loci and highlight a new mechanism of sodium channel regulation in disease susceptibility (Nature Genetics, (2022), 54, 3, (232-239), 10.1038/s41588-021-01007-6)
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Julien Barc, Barc, J, Tadros, R, Glinge, C, Chiang, D, Jouni, M, Simonet, F, Jurgens, S, Baudic, M, Nicastro, M, Potet, F, Offerhaus, J, Walsh, R, Hoan Choi, S, Verkerk, A, Mizusawa, Y, Anys, S, Minois, D, Arnaud, M, Duchateau, J, Wijeyeratne, Y, Muir, A, Papadakis, M, Castelletti, S, Torchio, M, Gil Ortuño, C, Lacunza, J, Giachino, D, Cerrato, N, Martins, R, Campuzano, O, Van Dooren, S, Thollet, A, Kyndt, F, Mazzanti, A, Clémenty, N, Bisson, A, Corveleyn, A, Stallmeyer, B, Dittmann, S, Saenen, J, Noël, A, Honarbakhsh, S, Rudic, B, Marzak, H, Rowe, M, Federspiel, C, Le Page, S, Placide, L, Milhem, A, Barajas-Martinez, H, Beckmann, B, Krapels, I, Steinfurt, J, Gregers Winkel, B, Jabbari, R, Shoemaker, M, Boukens, B, Škorić-Milosavljević, D, Bikker, H, Manevy, F, Lichtner, P, Ribasés, M, Meitinger, T, Müller-Nurasyid, M, Group, K, Veldink, J, van den Berg, L, Van Damme, P, Cusi, D, Lanzani, C, Rigade, S, Charpentier, E, Baron, E, Bonnaud, S, Lecointe, S, Donnart, A, Le Marec, H, Chatel, S, Karakachoff, M, Bézieau, S, London, B, Tfelt-Hansen, J, Roden, D, Odening, K, Cerrone, M, Chinitz, L, Volders, P, van de Berg, M, Laurent, G, Faivre, L, Antzelevitch, C, Kääb, S, Al Arnaout, A, Dupuis, J, Pasquie, J, Billon, O, Roberts, J, Jesel, L, Borggrefe, M, Lambiase, P, Mansourati, J, Loeys, B, Leenhardt, A, Guicheney, P, Maury, P, Schulze-Bahr, E, Robyns, T, Breckpot, J, Babuty, D, Priori, S, Napolitano, C, Referral Center for inherited cardiac arrhythmia, N, de Asmundis, C, Brugada, P, Brugada, R, Arbelo, E, Brugada, J, Mabo, P, Behar, N, Giustetto, C, Sabater Molina, M, Gimeno, J, Hasdemir, C, Schwartz, P, Crotti, L, Mckeown, P, Sharma, S, Behr, E, Haissaguerre, M, Sacher, F, Rooryck, C, Tan, H, Remme, C, Postema, P, Delmar, M, Ellinor, P, Lubitz, S, Gourraud, J, Tanck, M, L. George Jr., A, Macrae, C, Burridge, P, Dina, C, Probst, V, Wilde, A, Schott, J, Redon &, R, Bezzina, C, Julien Barc, Rafik Tadros, Charlotte Glinge, David Y. Chiang, Mariam Jouni, Floriane Simonet, Sean J. Jurgens, Manon Baudic, Michele Nicastro, Franck Potet, Joost A. Offerhaus, Roddy Walsh, Seung Hoan Choi, Arie O. Verkerk, Yuka Mizusawa, Soraya Anys, Damien Minois, Marine Arnaud, Josselin Duchateau, Yanushi D. Wijeyeratne, Alison Muir, Michael Papadakis, Silvia Castelletti, Margherita Torchio, Cristina Gil Ortuño, Javier Lacunza, Daniela F. Giachino, Natascia Cerrato, Raphaël P. Martins, Oscar Campuzano, Sonia Van Dooren, Aurélie Thollet, Florence Kyndt, Andrea Mazzanti, Nicolas Clémenty, Arnaud Bisson, Anniek Corveleyn, Birgit Stallmeyer, Sven Dittmann, Johan Saenen, Antoine Noël, Shohreh Honarbakhsh, Boris Rudic, Halim Marzak, Matthew K. Rowe, Claire Federspiel, Sophie Le Page, Leslie Placide, Antoine Milhem, Hector Barajas-Martinez, Britt-Maria Beckmann, Ingrid P. Krapels, Johannes Steinfurt, Bo Gregers Winkel, Reza Jabbari, Moore B. Shoemaker, Bas J. Boukens, Doris Škorić-Milosavljević, Hennie Bikker, Federico Manevy, Peter Lichtner, Marta Ribasés, Thomas Meitinger, Martina Müller-Nurasyid, KORA-Study Group, Jan H. Veldink, Leonard H. van den Berg, Philip Van Damme, Daniele Cusi, Chiara Lanzani, Sidwell Rigade, Eric Charpentier, Estelle Baron, Stéphanie Bonnaud, Simon Lecointe, Audrey Donnart, Hervé Le Marec, Stéphanie Chatel, Matilde Karakachoff, Stéphane Bézieau, Barry London, Jacob Tfelt-Hansen, Dan Roden, Katja E. Odening, Marina Cerrone, Larry A. Chinitz, Paul G. Volders, Maarten P. van de Berg, Gabriel Laurent, Laurence Faivre, Charles Antzelevitch, Stefan Kääb, Alain Al Arnaout, Jean-Marc Dupuis, Jean-Luc Pasquie, Olivier Billon, Jason D. Roberts, Laurence Jesel, Martin Borggrefe, Pier D. Lambiase, Jacques Mansourati, Bart Loeys, Antoine Leenhardt, Pascale Guicheney, Philippe Maury, Eric Schulze-Bahr, Tomas Robyns, Jeroen Breckpot, Dominique Babuty, Silvia G. Priori, Carlo Napolitano, Nantes Referral Center for inherited cardiac arrhythmia, Carlo de Asmundis, Pedro Brugada, Ramon Brugada, Elena Arbelo, Josep Brugada, Philippe Mabo, Nathalie Behar, Carla Giustetto, Maria Sabater Molina, Juan R. Gimeno, Can Hasdemir, Peter J. Schwartz, Lia Crotti, Pascal P. McKeown, Sanjay Sharma, Elijah R. Behr, Michel Haissaguerre, Frédéric Sacher, Caroline Rooryck, Hanno L. Tan, Carol A. Remme, Pieter G. Postema, Mario Delmar, Patrick T. Ellinor, Steven A. Lubitz, Jean-Baptiste Gourraud, Michael W. Tanck, Alfred L. George Jr., Calum A. MacRae, Paul W. Burridge, Christian Dina, Vincent Probst, Arthur A. Wilde, Jean-Jacques Schott, Richard Redon &, Connie R. Bezzina, Julien Barc, Barc, J, Tadros, R, Glinge, C, Chiang, D, Jouni, M, Simonet, F, Jurgens, S, Baudic, M, Nicastro, M, Potet, F, Offerhaus, J, Walsh, R, Hoan Choi, S, Verkerk, A, Mizusawa, Y, Anys, S, Minois, D, Arnaud, M, Duchateau, J, Wijeyeratne, Y, Muir, A, Papadakis, M, Castelletti, S, Torchio, M, Gil Ortuño, C, Lacunza, J, Giachino, D, Cerrato, N, Martins, R, Campuzano, O, Van Dooren, S, Thollet, A, Kyndt, F, Mazzanti, A, Clémenty, N, Bisson, A, Corveleyn, A, Stallmeyer, B, Dittmann, S, Saenen, J, Noël, A, Honarbakhsh, S, Rudic, B, Marzak, H, Rowe, M, Federspiel, C, Le Page, S, Placide, L, Milhem, A, Barajas-Martinez, H, Beckmann, B, Krapels, I, Steinfurt, J, Gregers Winkel, B, Jabbari, R, Shoemaker, M, Boukens, B, Škorić-Milosavljević, D, Bikker, H, Manevy, F, Lichtner, P, Ribasés, M, Meitinger, T, Müller-Nurasyid, M, Group, K, Veldink, J, van den Berg, L, Van Damme, P, Cusi, D, Lanzani, C, Rigade, S, Charpentier, E, Baron, E, Bonnaud, S, Lecointe, S, Donnart, A, Le Marec, H, Chatel, S, Karakachoff, M, Bézieau, S, London, B, Tfelt-Hansen, J, Roden, D, Odening, K, Cerrone, M, Chinitz, L, Volders, P, van de Berg, M, Laurent, G, Faivre, L, Antzelevitch, C, Kääb, S, Al Arnaout, A, Dupuis, J, Pasquie, J, Billon, O, Roberts, J, Jesel, L, Borggrefe, M, Lambiase, P, Mansourati, J, Loeys, B, Leenhardt, A, Guicheney, P, Maury, P, Schulze-Bahr, E, Robyns, T, Breckpot, J, Babuty, D, Priori, S, Napolitano, C, Referral Center for inherited cardiac arrhythmia, N, de Asmundis, C, Brugada, P, Brugada, R, Arbelo, E, Brugada, J, Mabo, P, Behar, N, Giustetto, C, Sabater Molina, M, Gimeno, J, Hasdemir, C, Schwartz, P, Crotti, L, Mckeown, P, Sharma, S, Behr, E, Haissaguerre, M, Sacher, F, Rooryck, C, Tan, H, Remme, C, Postema, P, Delmar, M, Ellinor, P, Lubitz, S, Gourraud, J, Tanck, M, L. George Jr., A, Macrae, C, Burridge, P, Dina, C, Probst, V, Wilde, A, Schott, J, Redon &, R, Bezzina, C, Julien Barc, Rafik Tadros, Charlotte Glinge, David Y. Chiang, Mariam Jouni, Floriane Simonet, Sean J. Jurgens, Manon Baudic, Michele Nicastro, Franck Potet, Joost A. Offerhaus, Roddy Walsh, Seung Hoan Choi, Arie O. Verkerk, Yuka Mizusawa, Soraya Anys, Damien Minois, Marine Arnaud, Josselin Duchateau, Yanushi D. Wijeyeratne, Alison Muir, Michael Papadakis, Silvia Castelletti, Margherita Torchio, Cristina Gil Ortuño, Javier Lacunza, Daniela F. Giachino, Natascia Cerrato, Raphaël P. Martins, Oscar Campuzano, Sonia Van Dooren, Aurélie Thollet, Florence Kyndt, Andrea Mazzanti, Nicolas Clémenty, Arnaud Bisson, Anniek Corveleyn, Birgit Stallmeyer, Sven Dittmann, Johan Saenen, Antoine Noël, Shohreh Honarbakhsh, Boris Rudic, Halim Marzak, Matthew K. Rowe, Claire Federspiel, Sophie Le Page, Leslie Placide, Antoine Milhem, Hector Barajas-Martinez, Britt-Maria Beckmann, Ingrid P. Krapels, Johannes Steinfurt, Bo Gregers Winkel, Reza Jabbari, Moore B. Shoemaker, Bas J. Boukens, Doris Škorić-Milosavljević, Hennie Bikker, Federico Manevy, Peter Lichtner, Marta Ribasés, Thomas Meitinger, Martina Müller-Nurasyid, KORA-Study Group, Jan H. Veldink, Leonard H. van den Berg, Philip Van Damme, Daniele Cusi, Chiara Lanzani, Sidwell Rigade, Eric Charpentier, Estelle Baron, Stéphanie Bonnaud, Simon Lecointe, Audrey Donnart, Hervé Le Marec, Stéphanie Chatel, Matilde Karakachoff, Stéphane Bézieau, Barry London, Jacob Tfelt-Hansen, Dan Roden, Katja E. Odening, Marina Cerrone, Larry A. Chinitz, Paul G. Volders, Maarten P. van de Berg, Gabriel Laurent, Laurence Faivre, Charles Antzelevitch, Stefan Kääb, Alain Al Arnaout, Jean-Marc Dupuis, Jean-Luc Pasquie, Olivier Billon, Jason D. Roberts, Laurence Jesel, Martin Borggrefe, Pier D. Lambiase, Jacques Mansourati, Bart Loeys, Antoine Leenhardt, Pascale Guicheney, Philippe Maury, Eric Schulze-Bahr, Tomas Robyns, Jeroen Breckpot, Dominique Babuty, Silvia G. Priori, Carlo Napolitano, Nantes Referral Center for inherited cardiac arrhythmia, Carlo de Asmundis, Pedro Brugada, Ramon Brugada, Elena Arbelo, Josep Brugada, Philippe Mabo, Nathalie Behar, Carla Giustetto, Maria Sabater Molina, Juan R. Gimeno, Can Hasdemir, Peter J. Schwartz, Lia Crotti, Pascal P. McKeown, Sanjay Sharma, Elijah R. Behr, Michel Haissaguerre, Frédéric Sacher, Caroline Rooryck, Hanno L. Tan, Carol A. Remme, Pieter G. Postema, Mario Delmar, Patrick T. Ellinor, Steven A. Lubitz, Jean-Baptiste Gourraud, Michael W. Tanck, Alfred L. George Jr., Calum A. MacRae, Paul W. Burridge, Christian Dina, Vincent Probst, Arthur A. Wilde, Jean-Jacques Schott, Richard Redon &, and Connie R. Bezzina
- Abstract
In the version of this article initially published, Federico Manevy’s name appeared with a middle initial in error. The name has been corrected in the HTML and PDF versions of the article.
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- 2022
8. Genome-wide association analyses identify new Brugada syndrome risk loci and highlight a new mechanism of sodium channel regulation in disease susceptibility
- Author
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Barc, J, Tadros, R, Glinge, C, Chiang, D, Jouni, M, Simonet, F, Jurgens, S, Baudic, M, Nicastro, M, Potet, F, Offerhaus, J, Walsh, R, Hoan Choi, S, Verkerk, A, Mizusawa, Y, Anys, S, Minois, D, Arnaud, M, Duchateau, J, Wijeyeratne, Y, Muir, A, Papadakis, M, Castelletti, S, Torchio, M, Gil Ortuño, C, Lacunza, J, Giachino, D, Cerrato, N, Martins, R, Campuzano, O, Van Dooren, S, Thollet, A, Kyndt, F, Mazzanti, A, Clémenty, N, Bisson, A, Corveleyn, A, Stallmeyer, B, Dittmann, S, Saenen, J, Noël, A, Honarbakhsh, S, Rudic, B, Marzak, H, Rowe, M, Federspiel, C, Le Page, S, Placide, L, Milhem, A, Barajas-Martinez, H, Beckmann, B, Krapels, I, Steinfurt, J, Gregers Winkel, B, Jabbari, R, Shoemaker, M, Boukens, B, Škorić-Milosavljević, D, Bikker, H, Manevy, F, Lichtner, P, Ribasés, M, Meitinger, T, Müller-Nurasyid, M, Group, K, Veldink, J, van den Berg, L, Van Damme, P, Cusi, D, Lanzani, C, Rigade, S, Charpentier, E, Baron, E, Bonnaud, S, Lecointe, S, Donnart, A, Le Marec, H, Chatel, S, Karakachoff, M, Bézieau, S, London, B, Tfelt-Hansen, J, Roden, D, Odening, K, Cerrone, M, Chinitz, L, Volders, P, van de Berg, M, Laurent, G, Faivre, L, Antzelevitch, C, Kääb, S, Al Arnaout, A, Dupuis, J, Pasquie, J, Billon, O, Roberts, J, Jesel, L, Borggrefe, M, Lambiase, P, Mansourati, J, Loeys, B, Leenhardt, A, Guicheney, P, Maury, P, Schulze-Bahr, E, Robyns, T, Breckpot, J, Babuty, D, Priori, S, Napolitano, C, Referral Center for inherited cardiac arrhythmia, N, de Asmundis, C, Brugada, P, Brugada, R, Arbelo, E, Brugada, J, Mabo, P, Behar, N, Giustetto, C, Sabater Molina, M, Gimeno, J, Hasdemir, C, Schwartz, P, Crotti, L, Mckeown, P, Sharma, S, Behr, E, Haissaguerre, M, Sacher, F, Rooryck, C, Tan, H, Remme, C, Postema, P, Delmar, M, Ellinor, P, Lubitz, S, Gourraud, J, Tanck, M, L. George Jr., A, Macrae, C, Burridge, P, Dina, C, Probst, V, Wilde, A, Schott, J, Redon &, R, Bezzina, C, Julien Barc, Rafik Tadros, Charlotte Glinge, David Y. Chiang, Mariam Jouni, Floriane Simonet, Sean J. Jurgens, Manon Baudic, Michele Nicastro, Franck Potet, Joost A. Offerhaus, Roddy Walsh, Seung Hoan Choi, Arie O. Verkerk, Yuka Mizusawa, Soraya Anys, Damien Minois, Marine Arnaud, Josselin Duchateau, Yanushi D. Wijeyeratne, Alison Muir, Michael Papadakis, Silvia Castelletti, Margherita Torchio, Cristina Gil Ortuño, Javier Lacunza, Daniela F. Giachino, Natascia Cerrato, Raphaël P. Martins, Oscar Campuzano, Sonia Van Dooren, Aurélie Thollet, Florence Kyndt, Andrea Mazzanti, Nicolas Clémenty, Arnaud Bisson, Anniek Corveleyn, Birgit Stallmeyer, Sven Dittmann, Johan Saenen, Antoine Noël, Shohreh Honarbakhsh, Boris Rudic, Halim Marzak, Matthew K. Rowe, Claire Federspiel, Sophie Le Page, Leslie Placide, Antoine Milhem, Hector Barajas-Martinez, Britt-Maria Beckmann, Ingrid P. Krapels, Johannes Steinfurt, Bo Gregers Winkel, Reza Jabbari, Moore B. Shoemaker, Bas J. Boukens, Doris Škorić-Milosavljević, Hennie Bikker, Federico Manevy, Peter Lichtner, Marta Ribasés, Thomas Meitinger, Martina Müller-Nurasyid, KORA-Study Group, Jan H. Veldink, Leonard H. van den Berg, Philip Van Damme, Daniele Cusi, Chiara Lanzani, Sidwell Rigade, Eric Charpentier, Estelle Baron, Stéphanie Bonnaud, Simon Lecointe, Audrey Donnart, Hervé Le Marec, Stéphanie Chatel, Matilde Karakachoff, Stéphane Bézieau, Barry London, Jacob Tfelt-Hansen, Dan Roden, Katja E. Odening, Marina Cerrone, Larry A. Chinitz, Paul G. Volders, Maarten P. van de Berg, Gabriel Laurent, Laurence Faivre, Charles Antzelevitch, Stefan Kääb, Alain Al Arnaout, Jean-Marc Dupuis, Jean-Luc Pasquie, Olivier Billon, Jason D. Roberts, Laurence Jesel, Martin Borggrefe, Pier D. Lambiase, Jacques Mansourati, Bart Loeys, Antoine Leenhardt, Pascale Guicheney, Philippe Maury, Eric Schulze-Bahr, Tomas Robyns, Jeroen Breckpot, Dominique Babuty, Silvia G. Priori, Carlo Napolitano, Nantes Referral Center for inherited cardiac arrhythmia, Carlo de Asmundis, Pedro Brugada, Ramon Brugada, Elena Arbelo, Josep Brugada, Philippe Mabo, Nathalie Behar, Carla Giustetto, Maria Sabater Molina, Juan R. Gimeno, Can Hasdemir, Peter J. Schwartz, Lia Crotti, Pascal P. McKeown, Sanjay Sharma, Elijah R. Behr, Michel Haissaguerre, Frédéric Sacher, Caroline Rooryck, Hanno L. Tan, Carol A. Remme, Pieter G. Postema, Mario Delmar, Patrick T. Ellinor, Steven A. Lubitz, Jean-Baptiste Gourraud, Michael W. Tanck, Alfred L. George Jr., Calum A. MacRae, Paul W. Burridge, Christian Dina, Vincent Probst, Arthur A. Wilde, Jean-Jacques Schott, Richard Redon &, Connie R. Bezzina, Barc, J, Tadros, R, Glinge, C, Chiang, D, Jouni, M, Simonet, F, Jurgens, S, Baudic, M, Nicastro, M, Potet, F, Offerhaus, J, Walsh, R, Hoan Choi, S, Verkerk, A, Mizusawa, Y, Anys, S, Minois, D, Arnaud, M, Duchateau, J, Wijeyeratne, Y, Muir, A, Papadakis, M, Castelletti, S, Torchio, M, Gil Ortuño, C, Lacunza, J, Giachino, D, Cerrato, N, Martins, R, Campuzano, O, Van Dooren, S, Thollet, A, Kyndt, F, Mazzanti, A, Clémenty, N, Bisson, A, Corveleyn, A, Stallmeyer, B, Dittmann, S, Saenen, J, Noël, A, Honarbakhsh, S, Rudic, B, Marzak, H, Rowe, M, Federspiel, C, Le Page, S, Placide, L, Milhem, A, Barajas-Martinez, H, Beckmann, B, Krapels, I, Steinfurt, J, Gregers Winkel, B, Jabbari, R, Shoemaker, M, Boukens, B, Škorić-Milosavljević, D, Bikker, H, Manevy, F, Lichtner, P, Ribasés, M, Meitinger, T, Müller-Nurasyid, M, Group, K, Veldink, J, van den Berg, L, Van Damme, P, Cusi, D, Lanzani, C, Rigade, S, Charpentier, E, Baron, E, Bonnaud, S, Lecointe, S, Donnart, A, Le Marec, H, Chatel, S, Karakachoff, M, Bézieau, S, London, B, Tfelt-Hansen, J, Roden, D, Odening, K, Cerrone, M, Chinitz, L, Volders, P, van de Berg, M, Laurent, G, Faivre, L, Antzelevitch, C, Kääb, S, Al Arnaout, A, Dupuis, J, Pasquie, J, Billon, O, Roberts, J, Jesel, L, Borggrefe, M, Lambiase, P, Mansourati, J, Loeys, B, Leenhardt, A, Guicheney, P, Maury, P, Schulze-Bahr, E, Robyns, T, Breckpot, J, Babuty, D, Priori, S, Napolitano, C, Referral Center for inherited cardiac arrhythmia, N, de Asmundis, C, Brugada, P, Brugada, R, Arbelo, E, Brugada, J, Mabo, P, Behar, N, Giustetto, C, Sabater Molina, M, Gimeno, J, Hasdemir, C, Schwartz, P, Crotti, L, Mckeown, P, Sharma, S, Behr, E, Haissaguerre, M, Sacher, F, Rooryck, C, Tan, H, Remme, C, Postema, P, Delmar, M, Ellinor, P, Lubitz, S, Gourraud, J, Tanck, M, L. George Jr., A, Macrae, C, Burridge, P, Dina, C, Probst, V, Wilde, A, Schott, J, Redon &, R, Bezzina, C, Julien Barc, Rafik Tadros, Charlotte Glinge, David Y. Chiang, Mariam Jouni, Floriane Simonet, Sean J. Jurgens, Manon Baudic, Michele Nicastro, Franck Potet, Joost A. Offerhaus, Roddy Walsh, Seung Hoan Choi, Arie O. Verkerk, Yuka Mizusawa, Soraya Anys, Damien Minois, Marine Arnaud, Josselin Duchateau, Yanushi D. Wijeyeratne, Alison Muir, Michael Papadakis, Silvia Castelletti, Margherita Torchio, Cristina Gil Ortuño, Javier Lacunza, Daniela F. Giachino, Natascia Cerrato, Raphaël P. Martins, Oscar Campuzano, Sonia Van Dooren, Aurélie Thollet, Florence Kyndt, Andrea Mazzanti, Nicolas Clémenty, Arnaud Bisson, Anniek Corveleyn, Birgit Stallmeyer, Sven Dittmann, Johan Saenen, Antoine Noël, Shohreh Honarbakhsh, Boris Rudic, Halim Marzak, Matthew K. Rowe, Claire Federspiel, Sophie Le Page, Leslie Placide, Antoine Milhem, Hector Barajas-Martinez, Britt-Maria Beckmann, Ingrid P. Krapels, Johannes Steinfurt, Bo Gregers Winkel, Reza Jabbari, Moore B. Shoemaker, Bas J. Boukens, Doris Škorić-Milosavljević, Hennie Bikker, Federico Manevy, Peter Lichtner, Marta Ribasés, Thomas Meitinger, Martina Müller-Nurasyid, KORA-Study Group, Jan H. Veldink, Leonard H. van den Berg, Philip Van Damme, Daniele Cusi, Chiara Lanzani, Sidwell Rigade, Eric Charpentier, Estelle Baron, Stéphanie Bonnaud, Simon Lecointe, Audrey Donnart, Hervé Le Marec, Stéphanie Chatel, Matilde Karakachoff, Stéphane Bézieau, Barry London, Jacob Tfelt-Hansen, Dan Roden, Katja E. Odening, Marina Cerrone, Larry A. Chinitz, Paul G. Volders, Maarten P. van de Berg, Gabriel Laurent, Laurence Faivre, Charles Antzelevitch, Stefan Kääb, Alain Al Arnaout, Jean-Marc Dupuis, Jean-Luc Pasquie, Olivier Billon, Jason D. Roberts, Laurence Jesel, Martin Borggrefe, Pier D. Lambiase, Jacques Mansourati, Bart Loeys, Antoine Leenhardt, Pascale Guicheney, Philippe Maury, Eric Schulze-Bahr, Tomas Robyns, Jeroen Breckpot, Dominique Babuty, Silvia G. Priori, Carlo Napolitano, Nantes Referral Center for inherited cardiac arrhythmia, Carlo de Asmundis, Pedro Brugada, Ramon Brugada, Elena Arbelo, Josep Brugada, Philippe Mabo, Nathalie Behar, Carla Giustetto, Maria Sabater Molina, Juan R. Gimeno, Can Hasdemir, Peter J. Schwartz, Lia Crotti, Pascal P. McKeown, Sanjay Sharma, Elijah R. Behr, Michel Haissaguerre, Frédéric Sacher, Caroline Rooryck, Hanno L. Tan, Carol A. Remme, Pieter G. Postema, Mario Delmar, Patrick T. Ellinor, Steven A. Lubitz, Jean-Baptiste Gourraud, Michael W. Tanck, Alfred L. George Jr., Calum A. MacRae, Paul W. Burridge, Christian Dina, Vincent Probst, Arthur A. Wilde, Jean-Jacques Schott, Richard Redon &, and Connie R. Bezzina
- Abstract
Brugada syndrome (BrS) is a cardiac arrhythmia disorder associated with sudden death in young adults. With the exception of SCN5A, encoding the cardiac sodium channel NaV1.5, susceptibility genes remain largely unknown. Here we performed a genome-wide association meta-analysis comprising 2,820 unrelated cases with BrS and 10,001 controls, and identified 21 association signals at 12 loci (10 new). Single nucleotide polymorphism (SNP)-heritability estimates indicate a strong polygenic influence. Polygenic risk score analyses based on the 21 susceptibility variants demonstrate varying cumulative contribution of common risk alleles among different patient subgroups, as well as genetic associations with cardiac electrical traits and disorders in the general population. The predominance of cardiac transcription factor loci indicates that transcriptional regulation is a key feature of BrS pathogenesis. Furthermore, functional studies conducted on MAPRE2, encoding the microtubule plus-end binding protein EB2, point to microtubule-related trafficking effects on NaV1.5 expression as a new underlying molecular mechanism. Taken together, these findings broaden our understanding of the genetic architecture of BrS and provide new insights into its molecular underpinnings.
- Published
- 2022
9. Three-dimensional ROIs in Brain PET.
- Author
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Jouni M. Mykkänen, Martti Juhola, and Ulla Ruotsalainen
- Published
- 1999
- Full Text
- View/download PDF
10. Automatic extraction of brain surface and mid-sagittal plane from PET images applying deformable models.
- Author
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Jouni M. Mykkänen, Jussi Tohka, Jouni Luoma, and Ulla Ruotsalainen
- Published
- 2005
- Full Text
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11. Deformable Mesh For Automated Surface Extraction From Noisy Images.
- Author
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Jussi Tohka and Jouni M. Mykkänen
- Published
- 2004
- Full Text
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12. Extracting VOIs from brain PET images.
- Author
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Jouni M. Mykkänen, Martti Juhola, and Ulla Ruotsalainen
- Published
- 2000
- Full Text
- View/download PDF
13. Cannabinoid Receptor Type 1 in Parkinson's Disease: A Positron Emission Tomography Study with [18F]FMPEP‐d2.
- Author
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Ajalin, Riikka M., Al‐Abdulrasul, Haidar, Tuisku, Jouni M., Hirvonen, Jussi E.S., Vahlberg, Tero, Lahdenpohja, Salla, Rinne, Juha O., and Brück, Anna E.
- Abstract
Background: The endocannabinoid system is a widespread neuromodulatory system affecting several biological functions and processes. High densities of type 1 cannabinoid (CB1) receptors and endocannabinoids are found in basal ganglia, which makes them an interesting target group for drug development in basal ganglia disorders such as Parkinson's disease (PD). Objective: The aim of this study was to investigate CB1 receptors in PD with [18F]FMPEP‐d2 positron emission tomography (PET) and the effect of dopaminergic medication on the [18F]FMPEP‐d2 binding. Methods: The data consisted of 16 subjects with PD and 10 healthy control subjects (HCs). All participants underwent a [18F]FMPEP‐d2 high‐resolution research tomograph PET examination for the quantitative assessment of cerebral binding to CB1 receptors. To investigate the effect of dopaminergic medication on the [18F]FMPEP‐d2 binding, 15 subjects with PD underwent [18F]FMPEP‐d2 PET twice, both on and off antiparkinsonian medication. Results: [18F]FMPEP‐d2 distribution volume was significantly lower in the off scan compared with the on scan in basal ganglia, thalamus, hippocampus, and amygdala (P < 0.05). Distribution volume was lower in subjects with PD off than in HCs globally (P < 0.05), but not higher than in HCs in any brain region. Conclusions: Subjects with PD have lower CB1 receptor availability compared with HCs. PD medication increases CB1 receptor toward normal levels. © 2022 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
14. Genome-wide association study identifies 18 new susceptibility variants loci associated with Brugada Syndrome
- Author
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Barc, J, primary, Trados, R, additional, Glinge, C, additional, Simonet, F, additional, Chiang, D, additional, Jouni, M, additional, Jurgens, S, additional, The Brugada Syndrome Genetic Consortium, B.R.S, additional, Tanck, M, additional, Dina, C, additional, Probst, V, additional, Wilde, A, additional, Redon, R, additional, Schott, J.J, additional, and Bezzina, C, additional
- Published
- 2020
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15. Automated Delineation of Brain Structures with Snakes in PET
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Mykkänen, Jouni M., primary, Tohka, Jussi, additional, and Ruotsalainen, Ulla, additional
- Published
- 2001
- Full Text
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16. Junior Software Engineers’ International Communication and Collaboration Competences
- Author
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Anu Niva, Jouni Markkula, and Elina Annanpera
- Subjects
International competence ,job advertisement ,junior software engineer ,software engineering ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Present-day Software Engineering working environment is highly international. Teams are commonly formed of people from different nationalities and cultural backgrounds. The team’s productivity and efficiency depend significantly on its members’ international communication and collaboration competences. Therefore, understanding the required competences is essential. The software organizations hiring new software engineers need to be able to define and describe the competences, and the junior software engineers applying for their first jobs should know what competences they need to possess and demonstrate. In this study, to increase understanding of necessary communication and collaboration competences in the international Software Engineering working environment, competences were, first, analyzed from the job advertisements applicable to junior software engineers and, second, identified by a literature review. The results were compared to identify what competences junior software engineers should learn and demonstrate, to be competent in the international software engineer job markets. The job advertisement findings show that the international operational environment expects extensive competence in collaboration, high competence in English, and considerable competence in local language and communication. Intercultural competence and other languages are hardly expected. The literature review emphasizes inter-related communication, collaboration, intercultural, and language competences at various levels. Eventually, junior software engineers should demonstrate a tolerant and adaptable attitude, cooperativeness, independence, openness, courage to influence, oral and written social interaction skills, fluent professional English and local language communication skills as well as field-specific and general collaboration methods. The findings benefit juniors and Software Engineering education through which also employers obtain more competent jobseekers.
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- 2023
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17. Extracting VOIs from brain PET images
- Author
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Mykkänen, Jouni M., Juhola, Martti, and Ruotsalainen, Ulla
- Published
- 2000
- Full Text
- View/download PDF
18. Lifestyle and cancer—a joint pairwise association of lifestyle habits with subsequent cancer diagnosis
- Author
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Roos, Eira T, primary, Lahti, Jouni M, additional, and Rahkonen, Ossi, additional
- Published
- 2018
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19. Lifestyle and cancer—a joint pairwise association of lifestyle habits with subsequent cancer diagnosis.
- Author
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Roos, Eira T, Lahti, Jouni M, and Rahkonen, Ossi
- Subjects
- *
TUMOR diagnosis , *TUMOR risk factors , *BEHAVIOR modification , *CONFIDENCE intervals , *DIET , *ALCOHOL drinking , *EMPLOYEE attitudes , *HEALTH behavior , *LONGITUDINAL method , *SMOKING , *SURVEYS , *PROPORTIONAL hazards models , *PHYSICAL activity , *ODDS ratio - Abstract
Background Unhealthy behaviours increase cancer risk. However, lifestyle habits co-occur and their joint association with cancer is not known. Methods A survey among midlife employees included data on lifestyle habits and covariates (N = 8960, response rate 67%, 80% women). The joint variables of lifestyle habits were prospectively linked with register data on cancer diagnosis (mean follow-up time 12.1 years). Cox proportional hazard model was used to calculate hazard ratios (HR), and their 95% confidence intervals. Results Smoking was associated with subsequent cancer risk and the association was strengthened by inactivity (HR 1.94, 1.46–2.59) and unhealthy diet (HR 1.92, 1.43–2.57). Smoking combined with both low (HR 1.70, 1.19–2.41) and moderate (HR 1.68, 1.27–2.23) alcohol consumption was also associated with increased cancer risk, as was unhealthy diet combined with moderate alcohol consumption (HR 1.55, 1.17–2.06) and inactivity (HR 1.44, 1.10–1.88). Inactivity combined with either low (HR 1.44, 1.06–1.96) or moderate (HR 1.47, 1.11–1.95) alcohol use was associated with subsequent cancer risk. Conclusions Key unhealthy behaviours have additive effects. Preventive measures should be targeted to especially smokers and those having several adverse lifestyle habits. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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20. Global Asymptotic Convergent Observer for SLAM
- Author
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Seyed Hamed Hashemi and Jouni Mattila
- Subjects
Geometric observers ,global convergence ,hybrid systems ,simultaneous localization and mapping (SLAM) ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
This paper investigates the global convergence problem of SLAM algorithms, a problem that has been subject to topological obstacles. This is due to the fact that state-space of attitude kinematics, $SO(3)$ , is a non-contractible manifold. Hence, $SO(3)$ is not diffeomorphic to Euclidean space. Therefore, existing SLAM algorithms can only guarantee almost global convergence. In order to overcome topological obstructions, this paper introduces a gradient-based hybrid observer that ensures global asymptotic convergence of estimation errors to zero. Moreover, integral action is augmented into the proposed observer to estimate unknown constant bias. Accordingly, a projection scheme is designed to cope with the integral action. Lyapunov stability theorem is used to prove the global asymptotic convergence of the proposed algorithm. Experimental and simulation results are provided to evaluate the performance and demonstrate the effectiveness and robustness of the proposed observer.
- Published
- 2022
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- View/download PDF
21. Analytic Solutions for Wheeled Mobile Manipulator Supporting Forces
- Author
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Goran R. Petrovic and Jouni Mattila
- Subjects
Mobile manipulators ,multibody dynamics ,tip-over monitoring ,wheel normal loads ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
When a mobile manipulator’s wheel loses contact with the ground, the manipulator may overturn, causing material damage, and in the worst case, putting human lives in danger. The overturning stability of wheeled mobile manipulators must not be overlooked at any stage of the mobile manipulator’s life, starting from the design phase, continuing through the commissioning period and extending to the operational phase. The various overturning stability criteria formulated throughout the years do not explicitly consider normal wheel loads, with most of them relying on the prescribed stability margins in terms of overturning moments. These formulations commonly consider the overturning moments regarding axes connecting the adjacent manipulator’s contact points with the ground and could be notably restrictive. Explicit expressions for the supporting forces of the manipulator provide the best insights into the relevant affecting terms that contribute to the overturning (in)stability. They also reduce the necessity for considering about which axis the manipulator could overturn and simultaneously enable the formulation of more intuitive stability margins and on- line overturning prevention techniques. The present study presents a general dynamics modelling approach in the Newton–Euler framework using 6D vectors and provides normal wheel load equations for a typical 4-wheeled rigid-chassis mobile manipulator traversing uneven terrain. The given expressions are expected to become the standard guidelines in considered wheeled mobile manipulators and to provide a basis for effective overturning stability criteria and overturning avoidance techniques. Based on the presented results, specific improvements of the state-of-the-art criteria are discussed.
- Published
- 2022
- Full Text
- View/download PDF
22. Extracting VOIs from brain PET images
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Martti Juhola, Jouni M. Mykkänen, and Ulla Ruotsalainen
- Subjects
Fluorine Radioisotopes ,Volume of interest ,Computer science ,media_common.quotation_subject ,Health Informatics ,Image processing ,computer.software_genre ,Positron ,Region of interest ,Image Processing, Computer-Assisted ,medicine ,Humans ,Contrast (vision) ,Computer vision ,media_common ,medicine.diagnostic_test ,Phantoms, Imaging ,business.industry ,Corpus Striatum ,Dihydroxyphenylalanine ,Information extraction ,Positron emission tomography ,Artificial intelligence ,Nuclear medicine ,business ,computer ,Algorithms ,Software ,Tomography, Emission-Computed - Abstract
A semi-automatic system for determining volumes of interest (VOI) from positron emission tomography (PET) scans of brain is described. The VOIs surface extraction is based on user selectable threshold and three-dimensional target flood-fill. Contrast to anatomical volume detection approaches, volumes are determined from functional PET images and the obtained objects are checked against anatomical images. The developed VOI program was evaluated with brain FDOPA-PET studies where the striatum was the object. The results were comparable to entirely manual method and the target extraction time is reduced to about one third of manual method.
- Published
- 2000
23. One Novel Hydraulic Actuating System for the Lower-Body Exoskeleton
- Author
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Maowen Sun, Xiaoping Ouyang, Jouni Mattila, Huayong Yang, and Gang Hou
- Subjects
Hydraulic actuating system (HAS) ,Lower-body exoskeletons ,Lightweight and integrated ,System identification ,Working mode test ,Ocean engineering ,TC1501-1800 ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
Abstract The hydraulic exoskeleton is one research hotspot in the field of robotics, which can take heavy load due to the high power density of the hydraulic system. However, the traditional hydraulic system is normally centralized, inefficient, and bulky during application, which limits its development in the exoskeleton. For improving the robot’s performance, its hydraulic actuating system should be optimized further. In this paper a novel hydraulic actuating system (HAS) based on electric-hydrostatic actuator is proposed, which is applied to hip and knee joints. Each HAS integrates an electric servo motor, a high-speed micro pump, a specific tank, and other components into a module. The specific parameters are obtained through relevant simulation according to human motion data and load requirements. The dynamic models of the HAS are built, and validated by the system identification. Experiments of trajectory tracking and human-exoskeleton interaction are carried out, which demonstrate the proposed HAS has the ability to be applied to the exoskeleton. Compared with the previous prototype, the total weight of the HAS in the robot is reduced by about 40%, and the power density is increased by almost 1.6 times.
- Published
- 2021
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- View/download PDF
24. Brain surface extraction from PET images with deformable model: assessment using Monte Carlo simulator
- Author
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Anthonin Reilhac, Ulla Ruotsalainen, Jussi Tohka, A. Kivimaki, and Jouni M. Mykkänen
- Subjects
medicine.diagnostic_test ,business.industry ,Computer science ,Monte Carlo method ,Feature extraction ,Image registration ,Brain surface ,Positron emission tomography ,Brain size ,Healthy volunteers ,medicine ,Computer vision ,Artificial intelligence ,Mr images ,business - Abstract
In this study, we evaluate quantitatively the performance of the DM-DSM (deformable model with dual surface minimization) method for brain surface extraction from PET images with Monte Carlo simulated data. The DM-DSM method is based on a deformable model and has been found reliable in previous tests with images of healthy volunteers acquired with C-11-Raclopride and F-18-FDG. As the evaluation of the method with real data is challenging, it could not provide precise figures describing the accuracy of the method. In addition to evaluation, we adjust parameter values for the DM-DSM method to improve its accuracy in this study. We compare the DM-DSM method to PET brain delineation based on MRI-PET registration. For this we assume either the knowledge of the precise anatomical brain volume or we extract the brain volume from the anatomical MR image. With FDG, the DM-DSM method yielded brain surfaces of high accuracy, almost as accurate as those obtained by using image registration and the knowledge of the exact anatomy. If the precise anatomical brain volume was not known, the DM- DSM method was more accurate than the image registration based method. With Raclopride, the accuracy of the DM-DSM method was slightly lower than with FDG but it was better than the one obtained using image registration and assuming the knowledge of the anatomical brain volume. When we extracted brain volume automatically from the MR image, the sagittal sinus was excluded from the brain improving the registration accuracy and leading to better quantitative results than those obtained with the DM-DSM method.
- Published
- 2004
25. Automatic extraction of brain surface and mid-sagittal plane from PET images applying deformable models
- Author
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Ulla Ruotsalainen, Jouni M. Mykkänen, Jouni Luoma, and Jussi Tohka
- Subjects
Adult ,Computer science ,Health Informatics ,Image processing ,Imaging phantom ,Contrast-to-noise ratio ,Fluorodeoxyglucose F18 ,medicine ,Image Processing, Computer-Assisted ,Humans ,Segmentation ,Computer vision ,medicine.diagnostic_test ,Plane (geometry) ,business.industry ,Computers ,Phantoms, Imaging ,Brain ,Sagittal plane ,Computer Science Applications ,medicine.anatomical_structure ,Positron emission tomography ,Raclopride ,Positron-Emission Tomography ,Tracer uptake ,Artificial intelligence ,business ,Algorithms ,Software - Abstract
In this study, we propose and evaluate new methods for automatic extraction of the brain surface and the mid-sagittal plane from functional positron emission tomography (PET) images. Designing methods for these segmentation tasks is challenging because the spatial distribution of intensity values in a PET image depends on the applied radiopharmaceutical and the contrast to noise ratio in a PET image is typically low. We extracted the brain surface with a deformable model which is based on a global optimization algorithm. The global optimization allows reliable automation of the extraction task. Based on the extracted brain surface, the mid-sagittal plane was determined. The method was tested with the image of the Hoffman brain phantom (FDG) and the images from the brain studies with the FDG (17 images) and the C11-Raclopride tracers (4 images). In addition to the brain surfaces, we applied the deformable model for extraction of the coarse cortical structure based on the tracer uptake from FDG-PET brain images. The proposed segmentation methods provide a promising direction for automatic processing and analysis of PET brain images.
- Published
- 2004
26. Flow-Bounded Velocity Controller for Hydraulic Bulldozers
- Author
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Teemu Mononen and Jouni Mattila
- Subjects
bulldozer ,mobile manipulator ,velocity control ,hydraulics ,actuator limits ,Technology - Abstract
The bulldozer is a mobile earthmoving machine with a differentially steered mobile base and an onboard manipulator used for soil cutting and transportation. Grading the ground to match a desired contour is an end-effector path-following task, with required joint rates dependent on mobile base motion. The offline planning of travel velocity profiles that respect the available hydraulic flowrate limits is difficult due to uncertainties in the machine–soil interactions. Hence, we propose a flow-bounded velocity controller enabling accurate automatic grading with online velocity scaling. The capacity of hydrostatic transmission and manipulator actuators, as well as the desired velocity, are considered when deciding the commanded velocity reference for the mobile base. Our dynamic simulation results show that, with the proposed controller, a desired ground profile is cut accurately when the machine operates at its performance limits. Comparison to constant velocity driving shows that errors in blade positioning are reduced dramatically. Constant velocity selected to keep the flow within limits results in longer completion times compared to our solution, making it more time optimal. Furthermore, the rpm of the diesel engine can be reduced to save fuel without compromising control performance.
- Published
- 2022
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- View/download PDF
27. Position-Based Impedance Control Design for a Hydraulically Actuated Series Elastic Actuator
- Author
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Pauli Mustalahti and Jouni Mattila
- Subjects
elastic actuator ,heavy duty manipulator ,impedance control ,Technology - Abstract
Series elastic actuators (SEAs) have become a common actuation method in torque-controlled electric lightweight arm applications that physically interact with the environment in assembly tasks. Compared to traditional actuators, SEAs can provide high force fidelity, shock tolerance, and force sensing for interaction control. Considering inherent system dynamics and the variable stiffness of the fluid, the control design for hydraulic SEAs (HSEAs) that lead into fifth-order system is a challenging task. As a novelty, a full state feedback controller design for the developed fifth-order HSEA system is presented to serve as an inner-loop controller to handle highly nonlinear dynamics behavior. In addition, as an outer-loop impedance controller for HSEAs in heavy-duty applications, the position-based impedance controller is designed to handle control of the HSEA system during the contact motion. Experimental results with a one-degree-of-freedom real-size experimental setup with a payload of 200 kilos demonstrates the effectiveness of the proposed HSEA control methods both in the free-space motion and in a contact impedance motion.
- Published
- 2022
- Full Text
- View/download PDF
28. Universal Path-Following of Wheeled Mobile Robots: A Closed-Form Bounded Velocity Solution
- Author
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Reza Oftadeh, Reza Ghabcheloo, and Jouni Mattila
- Subjects
wheeled mobile robots ,path-following ,nonholonomic constraints ,Chemical technology ,TP1-1185 - Abstract
This paper presents a nonlinear, universal, path-following controller for Wheeled Mobile Robots (WMRs). This approach, unlike previous algorithms, solves the path-following problem for all common categories of holonomic and nonholonomic WMRs, such as omnidirectional, unicycle, car-like, and all steerable wheels. This generality is the consequence of a two-stage solution that tackles separately the platform path-following and wheels’ kinematic constraints. In the first stage, for a mobile platform divested of the wheels’ constraints, we develop a general paradigm of a path-following controller that plans asymptotic paths from the WMR to the desired path and, accordingly, we derive a realization of the presented paradigm. The second stage accounts for the kinematic constraints imposed by the wheels. In this stage, we demonstrate that the designed controller simplifies the otherwise impenetrable wheels’ kinematic and nonholonomic constraints into explicit proportional functions between the velocity of the platform and that of the wheels. This result enables us to derive a closed-form trajectory generation scheme for the asymptotic path that constantly keeps the wheels’ steering and driving velocities within their corresponding, pre-specified bounds. Extensive experimental results on several types of WMRs, along with simulation results for the other types, are provided to demonstrate the performance and the efficacy of the method.
- Published
- 2021
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29. Chronic dysimmune demyelinating polyneuropathy: a clinical and electrophysiological study of 93 patients.
- Author
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Maisonobe, T, primary, Chassande, B, additional, Verin, M, additional, Jouni, M, additional, Leger, J M, additional, and Bouche, P, additional
- Published
- 1996
- Full Text
- View/download PDF
30. DEFORMABLE MESH FOR AUTOMATED SURFACE EXTRACTION FROM NOISY IMAGES.
- Author
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TOHKA, JUSSI and MYKKÄNEN, JOUNI M.
- Subjects
- *
IMAGE analysis , *MEDICAL imaging systems , *ALGORITHMS , *POSITRON emission tomography , *IMAGE - Abstract
Surface extraction from noisy volumetric images is a problem commonly encountered in medical image analysis. Deformable surface models can, in principle, solve the problem in an automatic manner. However, it is often essential that a reasonably close initialization and good parameter values for deformable models are provided. In this paper, novel algorithms for global minimization of the energy of deformable meshes are presented. We demonstrate that global optimization by these algorithms reduces the sensitivity of the deformable mesh to its initialization and its parameter values. Consequently, it becomes easier to automate the initialization process and the selection of parameter values. As the second contribution, the internal energy function is derived in a novel way in the framework of deformable surface models. The construction of the internal energy in this way features a simple way to derive the variants of our global optimization algorithm. The experiments with synthetic images are performed to compare variants of the proposed optimization algorithm. Also, we present a practical application of our deformable model to automatic segmentation of positron emission tomography images. [ABSTRACT FROM AUTHOR]
- Published
- 2004
- Full Text
- View/download PDF
31. Cannabinoid Receptor Type 1 in Parkinson's Disease: A Positron Emission Tomography Study with [18F]FMPEP‐d2.
- Author
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Ajalin, Riikka M., Al‐Abdulrasul, Haidar, Tuisku, Jouni M., Hirvonen, Jussi E.S., Vahlberg, Tero, Lahdenpohja, Salla, Rinne, Juha O., and Brück, Anna E.
- Abstract
Background: The endocannabinoid system is a widespread neuromodulatory system affecting several biological functions and processes. High densities of type 1 cannabinoid (CB1) receptors and endocannabinoids are found in basal ganglia, which makes them an interesting target group for drug development in basal ganglia disorders such as Parkinson's disease (PD). Objective: The aim of this study was to investigate CB1 receptors in PD with [18F]FMPEP‐d2 positron emission tomography (PET) and the effect of dopaminergic medication on the [18F]FMPEP‐d2 binding. Methods: The data consisted of 16 subjects with PD and 10 healthy control subjects (HCs). All participants underwent a [18F]FMPEP‐d2 high‐resolution research tomograph PET examination for the quantitative assessment of cerebral binding to CB1 receptors. To investigate the effect of dopaminergic medication on the [18F]FMPEP‐d2 binding, 15 subjects with PD underwent [18F]FMPEP‐d2 PET twice, both on and off antiparkinsonian medication. Results: [18F]FMPEP‐d2 distribution volume was significantly lower in the off scan compared with the on scan in basal ganglia, thalamus, hippocampus, and amygdala (P < 0.05). Distribution volume was lower in subjects with PD off than in HCs globally (P < 0.05), but not higher than in HCs in any brain region. Conclusions: Subjects with PD have lower CB1 receptor availability compared with HCs. PD medication increases CB1 receptor toward normal levels. © 2022 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society [ABSTRACT FROM AUTHOR]
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- 2022
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32. Fault Tolerant Control Architecture Design for Mobile Manipulation in Scientific Facilities
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Mohammad M. Aref, Reza Oftadeh, Reza Ghabcheloo, and Jouni Mattila
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Electronics ,TK7800-8360 ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
This paper describes one of the challenging issues implied by scientific infrastructures on a mobile robot cognition architecture. For a generally applicable cognition architecture, we study the dependencies and logical relations between several tasks and subsystems. The overall view of the software modules is described, including their relationship with a fault management module that monitors the consistency of the data flow among the modules. The fault management module is the solution of the deliberative architecture for the single point failures, and the safety anchor is the reactive solution for the faults by redundant equipment. In addition, a hardware architecture is proposed to ensure safe robot movement as a redundancy for the cognition of the robot. The method is designed for a four-wheel steerable (4WS) mobile manipulator (iMoro) as a case study.
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- 2015
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33. Automated Delineation of Brain Structures with Snakes in PET
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Jussi Tohka, Jouni M. Mykkänen, and Ulla Ruotsalainen
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Computer science
34. Assessment of brain surface extraction from PET images using Monte Carlo simulations
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Jouni M. Mykkänen, Ulla Ruotsalainen, Jussi Tohka, A. Kivimaki, and Anthonin Reilhac
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Nuclear and High Energy Physics ,medicine.medical_specialty ,Similarity (geometry) ,medicine.diagnostic_test ,Computer science ,business.industry ,Monte Carlo method ,Image registration ,Pattern recognition ,Brain surface ,Extractor ,Nuclear Energy and Engineering ,Positron emission tomography ,Simulated data ,Fully automatic ,medicine ,Medical physics ,Artificial intelligence ,Electrical and Electronic Engineering ,business - Abstract
In this paper, we evaluate quantitatively the performance of the fully automatic deformable model with dual surface minimization (DM-DSM) method for brain surface extraction from positron emission tomography (PET) images with Monte Carlo simulated data. In addition, we cross validate the DM-DSM method with a method based on MRI-PET registration for PET brain delineation. For this, the automated image registration (AIR) algorithm is combined with the anatomical brain surface extractor (BSE) algorithm. Two radiopharmaceuticals were considered: C-11-Raclopride and F-18-FDG. The success of the two methods was quantified by measuring the similarity between the extracted and the true brain volume. Also local differences between the extracted and the true brain surfaces were measured. With FDG, the DM-DSM method yielded brain surfaces of high accuracy and they were more accurate than with the image registration based method. With Raclopride, the accuracy of the DM-DSM method was slightly lower than with FDG and, on the average, similar to the accuracy of the image registration based method. However with Raclopride, maximal local differences between true and extracted surfaces were found to be greater with DM-DSM. In addition, preliminary experiments with images containing simulated pathology were done and the performance of DM-DSM was excellent in these experiments. To summarize, we found that the DM-DSM method can reliably extract brain surfaces of high accuracy from PET images.
35. Telerobotics and Systems Engineering for Scientific Facilities Editorial
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Manuel Ferre, Jouni Mattila, Bruno Siciliano, and Pierre Bonnal
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Electronics ,TK7800-8360 ,Electronic computers. Computer science ,QA75.5-76.95 - Published
- 2014
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36. Global Energy-Optimal Redundancy Resolution of Hydraulic Manipulators: Experimental Results for a Forestry Manipulator
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Jarmo Nurmi and Jouni Mattila
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hydraulic manipulator ,redundancy resolution ,energy optimisation ,energy-optimal ,global ,dynamic programming ,actuator limits ,load-sensing system ,constant-pressure system ,mobile hydraulic valve ,Technology - Abstract
This paper addresses the energy-inefficiency problem of four-degrees-of-freedom (4-DOF) hydraulic manipulators through redundancy resolution in robotic closed-loop controlled applications. Because conventional methods typically are local and have poor performance for resolving redundancy with respect to minimum hydraulic energy consumption, global energy-optimal redundancy resolution is proposed at the valve-controlled actuator and hydraulic power system interaction level. The energy consumption of the widely popular valve-controlled load-sensing (LS) and constant-pressure (CP) systems is effectively minimised through cost functions formulated in a discrete-time dynamic programming (DP) approach with minimum state representation. A prescribed end-effector path and important actuator constraints at the position, velocity and acceleration levels are also satisfied in the solution. Extensive field experiments performed on a forestry hydraulic manipulator demonstrate the performance of the proposed solution. Approximately 15–30% greater hydraulic energy consumption was observed with the conventional methods in the LS and CP systems. These results encourage energy-optimal redundancy resolution in future robotic applications of hydraulic manipulators.
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- 2017
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37. System Integration for Real-Time Mobile Manipulation
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Reza Oftadeh, Mohammad M. Aref, Reza Ghabcheloo, and Jouni Mattila
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Electronics ,TK7800-8360 ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
Mobile manipulators are one of the most complicated types of mechatronics systems. The performance of these robots in performing complex manipulation tasks is highly correlated with the synchronization and integration of their low-level components. This paper discusses in detail the mechatronics design of a four wheel steered mobile manipulator. It presents the manipulator's mechanical structure and electrical interfaces, designs low-level software architecture based on embedded PC-based controls, and proposes a systematic solution based on code generation products of MATLAB and Simulink. The remote development environment described here is used to develop real-time controller software and modules for the mobile manipulator under a POSIX-compliant, real-time Linux operating system. Our approach enables developers to reliably design controller modules that meet the hard real-time constraints of the entire low-level system architecture. Moreover, it provides a systematic framework for the development and integration of hardware devices with various communication mediums and protocols, which facilitates the development and integration process of the software controller.
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- 2014
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38. Super-FRS Target Area Remote Handling: Scenario and Development
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Luis Miguel Orona, Helmut Weick, Jouni Mattila, Faraz Amjad, Ekaterina Kozlova, Christos Karagiannis, Karl-Heinz Behr, and Martin Winkler
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Electronics ,TK7800-8360 ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
The Super-FRS, Superconducting Fragment Separator, is a unique machine that presents several challenging technical problems. One of these is regarding how to conduct maintenance in the target area where high levels of radiation will be generated and human access is forbidden. To address this problem the use of a remote maintenance system is foreseen. The objective of this paper is to develop a systems engineering (SE) research and development (R&D) approach suitable to develop the Super-FRS Target Area Remote Maintenance Systems (TARMS) and the RH design adaptation of the components in the target area. The Super-FRS target area is described in detail in order to introduce the need for a remote maintenance system. Components in the target area are classified by adopting ITER RH maintenance classification. The general scenario of remote handling and the current target area remote maintenance system are described. Finally, the proposed systems engineering approach is presented.
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- 2013
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39. Survey on Remote Handling Logistics for Super-FRS
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Faraz Amjad, Helmut Weick, Jouni Mattila, Luis Orona, Ekaterina Kozlova, Martin Winkler, Karl-Heinz Behr, and Christos Karagiannis
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Electronics ,TK7800-8360 ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
Remote Handling (RH) systems are now frequently used to conduct inspections and maintenance in hazardous environments. New particle accelerator facilities present unique logistic challenges due to high radiation levels, a hazardous environment and heavy loads. The Facility for Antiproton and Ion Research (FAIR) will deliver a beam of all ions up to uranium with intensities up to 10 12 238 U ions/s, which will cause high levels of radiation during operation so human access is limited. This paper contains a survey on RH logistics for existing High Intensity Beam (HIB) facilities to determine state of the art RH practices and to draw a conclusion based on the analysis. The second part of this paper presents a detailed study of beam losses, the radiation environment, RH logistic challenges and some proposed solutions for Super-FRS. This paper will also suggest a Systems Engineering (SE) approach for developing Super-FRS RH logistics.
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- 2013
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40. A New Hybrid Approach for Augmented Reality Maintenance in Scientific Facilities
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Héctor Martínez, Seppo Laukkanen, and Jouni Mattila
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Electronics ,TK7800-8360 ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
Maintenance in scientific facilities is a difficult issue, especially in large and hazardous facilities, due to the complexity of tasks and equipment. Augmented reality is a technology that has already shown great promise in the maintenance field. With the help of augmented reality applications, maintenance tasks can be carried out faster and more safely. The problem with current applications is that they are small-scale prototypes that do not easily scale to large facility maintenance applications. This paper presents a new hybrid approach that enables the creation of augmented reality maintenance applications for large and hazardous scientific facilities. In this paper, a new augmented reality marker and the algorithm for its recognition is proposed. The performance of the algorithm is verified in three test cases, showing promising results in two of them. Improvements in robustness in the third test case in which the camera is moving quickly or when light conditions are extreme are subject to further studies. The proposed new approach will be integrated into an existing augmented reality maintenance system.
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- 2013
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41. Multipolar second-harmonic emission with focused Gaussian beams
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Mikko J Huttunen, Jouni Mäkitalo, Godofredo Bautista, and Martti Kauranen
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Science ,Physics ,QC1-999 - Abstract
We show that electric-dipole-allowed surface second-harmonic (SH) generation with focused Gaussian beams can be described in terms of Mie-type multipolar contributions to the SH signal. In contrast to the traditional case, where Mie multipoles arise from field retardation across nanoparticles, the multipoles here arise from the confined source volume and the tensorial properties of the SH response. We demonstrate this by measuring strongly asymmetric SH emission into reflected and transmitted directions from a nonlinear thin film with isotropic surface symmetry, where symmetric emission is expected using traditional formalisms based on plane-wave excitation. The proposed multipole approach provides a convenient way to explain the measured asymmetric emission. Our results suggest that the separation of surface and bulk responses, which have dipolar and higher-multipolar character, respectively, may be even more difficult than thought. On the other hand, the multipolar approach may allow tailoring of focal conditions in order to design confined and thin nonlinear sources with desired radiation patterns.
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- 2012
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42. Genome-wide association analyses identify novel Brugada syndrome risk loci and highlight a new mechanism of sodium channel regulation in disease susceptibility
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Barc, Julien, Tadros, Rafik, Glinge, Charlotte, Chiang, David Y., Jouni, Mariam, Simonet, Floriane, Jurgens, Sean J., Baudic, Manon, Nicastro, Michele, Potet, Franck, Offerhaus, Joost A., Walsh, Roddy, Choi, Seung Hoan, Verkerk, Arie O., Mizusawa, Yuka, Anys, Soraya, Minois, Damien, Arnaud, Marine, Duchateau, Josselin, Wijeyeratne, Yanushi D., Muir, Alison, Papadakis, Michael, Castelletti, Silvia, Torchio, Margherita, Ortuño, Cristina Gil, Lacunza, Javier, Giachino, Daniela F., Cerrato, Natascia, Martins, Raphaël P., Campuzano, Oscar, Van Dooren, Sonia, Thollet, Aurélie, Kyndt, Florence, Mazzanti, Andrea, Clémenty, Nicolas, Bisson, Arnaud, Corveleyn, Anniek, Stallmeyer, Birgit, Dittmann, Sven, Saenen, Johan, Noël, Antoine, Honarbakhsh, Shohreh, Rudic, Boris, Marzak, Halim, Rowe, Matthew K., Federspiel, Claire, Le Page, Sophie, Placide, Leslie, Milhem, Antoine, Barajas-Martinez, Hector, Beckmann, Britt-Maria, Krapels, Ingrid P., Steinfurt, Johannes, Winkel, Bo Gregers, Jabbari, Reza, Shoemaker, Moore B., Boukens, Bas J., Škorić-Milosavljević, Doris, Bikker, Hennie, Manevy, Federico, Lichtner, Peter, Ribasés, Marta, Meitinger, Thomas, Müller-Nurasyid, Martina, Strauch, Konstantin, Peters, Annette, Schulz, Holger, Schwettmann, Lars, Leidl, Reiner, Heier, Margit, Veldink, Jan H., van den Berg, Leonard H., Van Damme, Philip, Cusi, Daniele, Lanzani, Chiara, Rigade, Sidwell, Charpentier, Eric, Baron, Estelle, Bonnaud, Stéphanie, Lecointe, Simon, Donnart, Audrey, Le Marec, Hervé, Chatel, Stéphanie, Karakachoff, Matilde, Bézieau, Stéphane, London, Barry, Tfelt-Hansen, Jacob, Roden, Dan, Odening, Katja E., Cerrone, Marina, Chinitz, Larry A., Volders, Paul G., van de Berg, Maarten P., Laurent, Gabriel, Faivre, Laurence, Antzelevitch, Charles, Kääb, Stefan, Arnaout, Alain Al, Dupuis, Jean-Marc, Pasquie, Jean-Luc, Billon, Olivier, Roberts, Jason D., Jesel, Laurence, Borggrefe, Martin, Lambiase, Pier D., Mansourati, Jacques, Loeys, Bart, Leenhardt, Antoine, Guicheney, Pascale, Maury, Philippe, Schulze-Bahr, Eric, Robyns, Tomas, Breckpot, Jeroen, Babuty, Dominique, Priori, Silvia G., Napolitano, Carlo, Defaye, Pascal, Anselme, Frédéric, Darmon, Jean Philippe, Wiart, François, de Asmundis, Carlo, Brugada, Pedro, Brugada, Ramon, Arbelo, Elena, Brugada, Josep, Mabo, Philippe, Behar, Nathalie, Giustetto, Carla, Molina, Maria Sabater, Gimeno, Juan R., Hasdemir, Can, Schwartz, Peter J., Crotti, Lia, McKeown, Pascal P., Sharma, Sanjay, Behr, Elijah R., Haissaguerre, Michel, Sacher, Frédéric, Rooryck, Caroline, Tan, Hanno L., Remme, Carol A., Postema, Pieter G., Delmar, Mario, Ellinor, Patrick T., Lubitz, Steven A., Gourraud, Jean-Baptiste, Tanck, Michael W., George, Alfred L., MacRae, Calum A., Burridge, Paul W., Dina, Christian, Probst, Vincent, Wilde, Arthur A., Schott, Jean-Jacques, Redon, Richard, Bezzina, Connie R., KORA-Study Group, Nantes Referral Ctr Inherited Card, unité de recherche de l'institut du thorax UMR1087 UMR6291 (ITX), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Nantes Université - UFR de Médecine et des Techniques Médicales (Nantes Univ - UFR MEDECINE), Nantes Université - pôle Santé, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Santé, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), Centre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] (CRCTB), Université Bordeaux Segalen - Bordeaux 2-CHU Bordeaux [Bordeaux]-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Pontchaillou [Rennes], Laboratoire Traitement du Signal et de l'Image (LTSI), Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM), Santé - François Bonamy, Université de Nantes (UN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche en Santé de l'Université de Nantes (IRS-UN)-Centre hospitalier universitaire de Nantes (CHU Nantes), Physiologie & médecine expérimentale du Cœur et des Muscles [U 1046] (PhyMedExp), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier), Unité de Recherche sur les Maladies Cardiovasculaires, du Métabolisme et de la Nutrition = Research Unit on Cardiovascular and Metabolic Diseases (ICAN), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Institut de Cardiométabolisme et Nutrition = Institute of Cardiometabolism and Nutrition [CHU Pitié Salpêtrière] (IHU ICAN), CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Laboratoire Maladies Rares: Génétique et Métabolisme (Bordeaux) (U1211 INSERM/MRGM), Université de Bordeaux (UB)-Groupe hospitalier Pellegrin-Institut National de la Santé et de la Recherche Médicale (INSERM), Amsterdam UMC - Amsterdam University Medical Center, The MINE study (J.H.V.) has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement no. 772376—EScORIAL). The collaboration project is cofunded by the PPP Allowance made available by Health~Holland, Top Sector Life Sciences & Health, to stimulate public–private partnerships. This study makes use of data generated by the Wellcome Trust Case-Control Consortium. A full list of the investigators who contributed to the generation of the data is available from www.wtccc.org.uk. Funding for the project was provided by the Wellcome Trust under award 076113, 085475 and 090355. The KORA research platform (KORA, Cooperative Research in the Region of Augsburg) was initiated and financed by the Helmholtz Zentrum München—German Research Center for Environmental Health, which is funded by the German Federal Ministry of Education and Research and by the State of Bavaria. Furthermore, KORA research was supported within the Munich Center of Health Sciences (MC Health), Ludwig-Maximilians-Universität, as part of LMUinnovativ. J. Barc is supported by the research program Etoiles montantes des Pays de la Loire REGIOCARD RPH081-U1087-REG-PDL, ANR JCJC LEARN (R21006NN, RPV21014NNA) and by the H2020-MSCA-IF-2014 Program of the European Commission (RISTRAD-661617). R.T. is supported by the Canadian Heart Rhythm Society’s George Mines Award, the European Society of Cardiology research award, and the Philippa and Marvin Carsley Cardiology Chair. D.Y.C. is supported by Fondation Leducq and National Institutes of Health (NIH) NHGRI T32 (no. 1T32HG010464-01). M. Baudic was supported by IRP—VERACITIES—New Mechanisms for VEntricular ARrhythmia And CardIomeTabolic DIseasES, an I-SITE NExT health and engineering initiative (Ecole Centrale and Nantes University) and by the IRP—GAINES—Genetic Architecture IN cardiovascular disEaSes funded by INSERM and CNRS. R.W. is supported by an Amsterdam Cardiovascular Sciences fellowship. S.C. is supported by the NHLBI BioData Catalyst Fellows Program. C.A.R. is supported by Fondation Leducq, the Dutch Heart Foundation (CVON PREDICT2) and the Innovational Research Incentives Scheme Vidi grant from the Netherlands Organisation for Health Research and Development (ZonMw, 91714371). Y.D.W. is supported by the Robert Lancaster Memorial Fund. M.P. is supported by Cardiac Risk in the Young. S.V.D. is supported by Wetenschappelijk Fonds Willy Gepts VUB-UZ Brussel, project ‘Unravelling the molecular genetic pathways of Brugada Syndrome by cardiomics research’, VUB IRP project ‘IMAGica: an Integrative personalized Medical Approach for Genetic diseases, Inherited Cardia Arrhythmias as a model’ and Innoviris BRIDGE 2017, project ‘IGenCare: Integrated Personalised Medical Genomics Care Solution for Patients with Rare Genetic Diseases’. S.H. is supported by the Barts BRC. B.R. is supported by the DZHK (German Centre for Cardiovascular Research) and by the BMBF (German Ministry of Education and Research). B.G.W. is supported by the Danish Heart Foundation. M.B.S. is supported by K23HL127704. Project MinE Belgium was supported by a grant from IWT (no. 140935), the ALS Liga België, the National Lottery of Belgium and the KU Leuven Opening the Future Fund. D.C. and C.L. are supported by HYPERGENES (HEALTH-F4-2007). D.R. is supported by R01 HL149826, P50 GM115305. P.J.S. acknowledges the support of Leducq Foundation for Cardiovascular Research grant 18CVD05. P.V.D. is supported by the Netherlands CardioVascular Research Initiative (CVON PREDICT2). C.A. is supported by NIH HL47678 and HL138103, W.W. Smith Charitable Trust and Wistar Morris Fund. M.B. is Supported by the DZHK (German Centre for Cardiovascular Research) and by the BMBF (German Ministry of Education and Research). P.D.L. is supported by UCL/UCLH Biomedicine NIHR and Barts BRC. B.L. is supported by GOA—Antigone 33933. J.B. is supported by a Senior Clinical Fellowship of the Flemish Science Foundation (FWO). E.B. is supported by the British Heart Foundation including BHF Clinical Research Training Fellowship (FS/11/71/28918: Future diagnostic role and new genetic loci in SADS), Cardiac Risk in the Young and Robert Lancaster Memorial fund sponsored by McColl’s Ltd. Retail Group. H.L.T. is supported by the European Union’s Horizon 2020 research and innovation program under acronym ESCAPE-NET, registered under grant agreement no. 733381, and the Dutch Heart Foundation (CVON RESCUED and PREDICT2 projects). M.D. is supported by NIH-RO1 HL134328. P.T.E. was supported by the Fondation Leducq (14CVD01), the NIH (1RO1HL092577, R01HL128914, K24HL105780), the American Heart Association (18SFRN34110082) and by a research grant from Bayer AG to the Broad Institute. S.A.L. is supported by NIH grant 1R01HL139731 and American Heart Association 18SFRN34250007. J.-B.G. received a grant from the Fédération Française de Cardiologie (PREVENT project). A.L.G. is supported by the Fondation Leducq. C.A.M.R. is supported by the Leducq Foundation and Burroughs Wellecome Fund. A.A.W. is supported by the Dutch Heart Foundation (CVON PREDICT2 project). J.-J.S. is supported by the Fondation pour la Recherche Médicale (DEQ20140329545). R.R. and P.G. are supported by the National Agency for Research (ANR-GENSUD-14-CE10-0001). C.R.B. is supported by the Dutch Heart Foundation (CVON PREDICT2 project), the Netherlands Organization for Scientific Research (VICI fellowship, 016.150.610) and Fondation Leducq (17CVD02)., Barc, J, Tadros, R, Glinge, C, Chiang, D, Jouni, M, Simonet, F, Jurgens, S, Baudic, M, Nicastro, M, Potet, F, Offerhaus, J, Walsh, R, Hoan Choi, S, Verkerk, A, Mizusawa, Y, Anys, S, Minois, D, Arnaud, M, Duchateau, J, Wijeyeratne, Y, Muir, A, Papadakis, M, Castelletti, S, Torchio, M, Gil Ortuño, C, Lacunza, J, Giachino, D, Cerrato, N, Martins, R, Campuzano, O, Van Dooren, S, Thollet, A, Kyndt, F, Mazzanti, A, Clémenty, N, Bisson, A, Corveleyn, A, Stallmeyer, B, Dittmann, S, Saenen, J, Noël, A, Honarbakhsh, S, Rudic, B, Marzak, H, Rowe, M, Federspiel, C, Le Page, S, Placide, L, Milhem, A, Barajas-Martinez, H, Beckmann, B, Krapels, I, Steinfurt, J, Gregers Winkel, B, Jabbari, R, Shoemaker, M, Boukens, B, Škorić-Milosavljević, D, Bikker, H, Manevy, F, Lichtner, P, Ribasés, M, Meitinger, T, Müller-Nurasyid, M, Group, K, Veldink, J, van den Berg, L, Van Damme, P, Cusi, D, Lanzani, C, Rigade, S, Charpentier, E, Baron, E, Bonnaud, S, Lecointe, S, Donnart, A, Le Marec, H, Chatel, S, Karakachoff, M, Bézieau, S, London, B, Tfelt-Hansen, J, Roden, D, Odening, K, Cerrone, M, Chinitz, L, Volders, P, van de Berg, M, Laurent, G, Faivre, L, Antzelevitch, C, Kääb, S, Al Arnaout, A, Dupuis, J, Pasquie, J, Billon, O, Roberts, J, Jesel, L, Borggrefe, M, Lambiase, P, Mansourati, J, Loeys, B, Leenhardt, A, Guicheney, P, Maury, P, Schulze-Bahr, E, Robyns, T, Breckpot, J, Babuty, D, Priori, S, Napolitano, C, Referral Center for inherited cardiac arrhythmia, N, de Asmundis, C, Brugada, P, Brugada, R, Arbelo, E, Brugada, J, Mabo, P, Behar, N, Giustetto, C, Sabater Molina, M, Gimeno, J, Hasdemir, C, Schwartz, P, Crotti, L, Mckeown, P, Sharma, S, Behr, E, Haissaguerre, M, Sacher, F, Rooryck, C, Tan, H, Remme, C, Postema, P, Delmar, M, Ellinor, P, Lubitz, S, Gourraud, J, Tanck, M, L. George Jr., A, Macrae, C, Burridge, P, Dina, C, Probst, V, Wilde, A, Schott, J, Redon &, R, Bezzina, C, Cardiology, Graduate School, Medical Biology, ACS - Amsterdam Cardiovascular Sciences, ACS - Heart failure & arrhythmias, Human Genetics, ACS - Pulmonary hypertension & thrombosis, ARD - Amsterdam Reproduction and Development, APH - Methodology, Epidemiology and Data Science, MUMC+: DA KG Polikliniek (9), RS: Carim - H02 Cardiomyopathy, Cardiologie, MUMC+: MA Med Staf Spec Cardiologie (9), RS: Carim - H04 Arrhythmogenesis and cardiogenetics, and Cardiovascular Centre (CVC)
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EXPRESSION ,[SDV]Life Sciences [q-bio] ,DIAGNOSIS ,GUIDELINES ,ANNOTATION ,Article ,NAV1.5 Voltage-Gated Sodium Channel ,Young Adult ,MANAGEMENT ,Genetics ,GWAS ,Humans ,Genetic Predisposition to Disease ,610 Medicine & health ,SCN5A ,Alleles ,Brugada Syndrome ,Allele ,[SDV.GEN]Life Sciences [q-bio]/Genetics ,HERITABILITY ,Microtubule-Associated Protein ,Brugada Syndrome, GWAS, SNPs ,COMMON VARIANTS ,Mutation ,Disease Susceptibility ,Human medicine ,ENRICHMENT ,Microtubule-Associated Proteins ,SNPs ,Human ,GENERATION ,Genome-Wide Association Study - Abstract
Brugada syndrome (BrS) is a cardiac arrhythmia disorder associated with sudden death in young adults. With the exception of SCN5A, encoding the cardiac sodium channel Na(V)1.5, susceptibility genes remain largely unknown. Here we performed a genome-wide association meta-analysis comprising 2,820 unrelated cases with BrS and 10,001 controls, and identified 21 association signals at 12 loci (10 new). Single nucleotide polymorphism (SNP)-heritability estimates indicate a strong polygenic influence. Polygenic risk score analyses based on the 21 susceptibility variants demonstrate varying cumulative contribution of common risk alleles among different patient subgroups, as well as genetic associations with cardiac electrical traits and disorders in the general population. The predominance of cardiac transcription factor loci indicates that transcriptional regulation is a key feature of BrS pathogenesis. Furthermore, functional studies conducted on MAPRE2, encoding the microtubule plus-end binding protein EB2, point to microtubule-related trafficking effects on Na(V)1.5 expression as a new underlying molecular mechanism. Taken together, these findings broaden our understanding of the genetic architecture of BrS and provide new insights into its molecular underpinnings. Genome-wide association analyses identify new susceptibility loci for Brugada syndrome. Functional studies implicate microtubule-related trafficking effects on sodium channel expression as an underlying molecular mechanism., European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program [772376-EScORIAL]; Health~Holland; Top Sector Life Sciences Health; Wellcome Trust [076113, 085475, 090355]; Helmholtz Zentrum Munchen-German Research Center for Environmental Health - German Federal Ministry of Education and Research; State of Bavaria; Munich Center of Health Sciences (MC Health), Ludwig-Maximilians-Universitat, as part of LMUinnovativ; research program Etoiles montantes des Pays de la Loire [REGIOCARD RPH081-U1087-REG-PDL]; ANR JCJC LEARN [R21006NN, RPV21014NNA]; H2020-MSCA-IF-2014 Program of the European Commission [RISTRAD-661617]; Canadian Heart Rhythm Society's George Mines Award; European Society of Cardiology research award; Philippa and Marvin Carsley Cardiology Chair; Fondation Leducq; National Institutes of Health (NIH) NHGRI T32 [1T32HG010464-01]; IRP-VERACITIES-New Mechanisms for VEntricular ARrhythmia And CardIomeTabolic DIseasES an I-SITE NExT health and engineering initiative (Ecole Centrale); IRP-VERACITIES-New Mechanisms for VEntricular ARrhythmia And CardIomeTabolic DIseasES an I-SITE NExT health and engineering initiative (Nantes University); IRP-GAINES-Genetic Architecture IN cardiovascular disEaSes - INSERM; CNRS; Amsterdam Cardiovascular Sciences fellowship; NHLBI BioData Catalyst Fellows Program; Dutch Heart Foundation [CVON PREDICT2]; Innovational Research Incentives Scheme Vidi grant from the Netherlands Organisation for Health Research and Development (ZonMw) [91714371]; Robert Lancaster Memorial Fund; Cardiac Risk in the Young; Wetenschappelijk Fonds Willy Gepts VUB-UZ Brussel; VUB IRP project `IMAGica: an Integrative personalized Medical Approach for Genetic diseases, Inherited Cardia Arrhythmias as a model' and Innoviris BRIDGE 2017; project `IGenCare: Integrated Personalised Medical Genomics Care Solution for Patients with Rare Genetic Diseases'; Barts BRC; DZHK (German Centre for Cardiovascular Research); BMBF (German Ministry of Education and Research); Danish Heart Foundation; IWT [140935]; ALS Liga Belgie; National Lottery of Belgium; KU Leuven Opening the Future Fund; HYPERGENES [HEALTH-F4-2007]; Leducq Foundation for Cardiovascular Research grant [18CVD05]; Netherlands CardioVascular Research Initiative [CVON PREDICT2]; NIH [HL47678, HL138103, 1RO1HL092577, R01HL128914, K24HL105780]; W.W. Smith Charitable Trust; Wistar Morris Fund; GOA-Antigone [33933]; Senior Clinical Fellowship of the Flemish Science Foundation (FWO); British Heart Foundation; BHF Clinical Research Training Fellowship [FS/11/71/28918]; Cardiac Risk in the Young and Robert Lancaster Memorial fund - McColl's Ltd. Retail Group; European Union's Horizon 2020 research and innovation program under acronym ESCAPE-NET [733381]; Dutch Heart Foundation; Fondation Leducq [14CVD01, 17CVD02]; American Heart Association [18SFRN34110082, 18SFRN34250007]; Bayer AG; NIH grant [1R01HL139731]; Federation Francaise de Cardiologie (PREVENT project); Leducq Foundation; Burroughs Wellecome Fund; Fondation pour la Recherche Medicale [DEQ20140329545]; National Agency for Research [ANR-GENSUD-14-CE10-0001]; Netherlands Organization for Scientific Research (VICI fellowship) [016.150.610]; [K23HL127704]; [R01 HL149826]; [P50 GM115305]; [NIH-RO1 HL134328], We are greatly indebted to the patients included in the study. We thank V. Cotard, C. Goutsmedt, M.-F. Le Cunff and N. Bourgeais for assistance in patient recruitment and L. Beekman for his technical support. We thank the biological resource centre for biobanking (CHU Nantes, Nantes Universite, Centre de ressources biologiques (BB0033-00040), F-44000 Nantes, France) for applying the following guidelines68. We are most grateful to the Genomics and Bioinformatics Core Facility of Nantes (GenoBiRD, Biogenouest, IFB) for its technical support. This research has been conducted using the UK Biobank resource; we are grateful to UK Biobank participants. The MINE study (J.H.V.) has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement no. 772376-EScORIAL). The collaboration project is cofunded by the PPP Allowance made available by Health~Holland, Top Sector Life Sciences & Health, to stimulate public-private partnerships. This study makes use of data generated by the Wellcome Trust Case-Control Consortium. A full list of the investigators who contributed to the generation of the data is available from www.wtccc.org.uk.Funding for the project was provided by the Wellcome Trust under award 076113, 085475 and 090355. The KORA research platform (KORA, Cooperative Research in the Region of Augsburg) was initiated and financed by the Helmholtz Zentrum Munchen-German Research Center for Environmental Health, which is funded by the German Federal Ministry of Education and Research and by the State of Bavaria. Furthermore, KORA research was supported within the Munich Center of Health Sciences (MC Health), Ludwig-Maximilians-Universitat, as part of LMUinnovativ. J. Barc is supported by the research program Etoiles montantes des Pays de la Loire REGIOCARD RPH081-U1087-REG-PDL, ANR JCJC LEARN (R21006NN, RPV21014NNA) and by the H2020-MSCA-IF-2014 Program of the European Commission (RISTRAD-661617). R.T. is supported by the Canadian Heart Rhythm Society's George Mines Award, the European Society of Cardiology research award, and the Philippa and Marvin Carsley Cardiology Chair. D.Y.C. is supported by Fondation Leducq and National Institutes of Health (NIH) NHGRI T32 (no. 1T32HG010464-01). M. Baudic was supported by IRP-VERACITIES-New Mechanisms for VEntricular ARrhythmia And CardIomeTabolic DIseasES, an I-SITE NExT health and engineering initiative (Ecole Centrale and Nantes University) and by the IRP-GAINES-Genetic Architecture IN cardiovascular disEaSes funded by INSERM and CNRS. R.W. is supported by an Amsterdam Cardiovascular Sciences fellowship. S.C. is supported by the NHLBI BioData Catalyst Fellows Program. C.A.R. is supported by Fondation Leducq, the Dutch Heart Foundation (CVON PREDICT2) and the Innovational Research Incentives Scheme Vidi grant from the Netherlands Organisation for Health Research and Development (ZonMw; 91714371). Y.D.W. is supported by the Robert Lancaster Memorial Fund. M.P. is supported by Cardiac Risk in the Young. S.V.D. is supported by Wetenschappelijk Fonds Willy Gepts VUB-UZ Brussel, project `Unravelling the molecular genetic pathways of Brugada Syndrome by cardiomics research', VUB IRP project `IMAGica: an Integrative personalized Medical Approach for Genetic diseases, Inherited Cardia Arrhythmias as a model' and Innoviris BRIDGE 2017, project `IGenCare: Integrated Personalised Medical Genomics Care Solution for Patients with Rare Genetic Diseases'. S.H. is supported by the Barts BRC. B.R.; is supported by the DZHK (German Centre for Cardiovascular Research) and by the BMBF (German Ministry of Education and Research). B.G.W. is supported by the Danish Heart Foundation. M.B.S. is supported by K23HL127704. Project MinE Belgium was supported by a grant from IWT (no. 140935), the ALS Liga Belgie, the National Lottery of Belgium and the KU Leuven Opening the Future Fund. D.C. and C.L. are supported by HYPERGENES (HEALTH-F4-2007). D.R. is supported by R01 HL149826, P50 GM115305. P.J.S. acknowledges the support of Leducq Foundation for Cardiovascular Research grant 18CVD05. P.V.D. is supported by the Netherlands CardioVascular Research Initiative (CVON PREDICT2). C.A. is supported by NIH HL47678 and HL138103, W.W. Smith Charitable Trust and Wistar Morris Fund. M.B. is Supported by the DZHK (German Centre for Cardiovascular Research) and by the BMBF (German Ministry of Education and Research). P.D.L. is supported by UCL/UCLH Biomedicine NIHR and Barts BRC. B.L. is supported by GOA-Antigone 33933. J.B. is supported by a Senior Clinical Fellowship of the Flemish Science Foundation (FWO). E.B. is supported by the British Heart Foundation including BHF Clinical Research Training Fellowship (FS/11/71/28918: Future diagnostic role and new genetic loci in SADS), Cardiac Risk in the Young and Robert Lancaster Memorial fund sponsored by McColl's Ltd. Retail Group. H.L.T. is supported by the European Union's Horizon 2020 research and innovation program under acronym ESCAPE-NET, registered under grant agreement no. 733381, and the Dutch Heart Foundation (CVON RESCUED and PREDICT2 projects). M.D. is supported by NIH-RO1 HL134328. P.T.E. was supported by the Fondation Leducq (14CVD01), the NIH (1RO1HL092577, R01HL128914, K24HL105780), the American Heart Association (18SFRN34110082) and by a research grant from Bayer AG to the Broad Institute. S.A.L. is supported by NIH grant 1R01HL139731 and American Heart Association 18SFRN34250007. J.-B.G. received a grant from the Federation Francaise de Cardiologie (PREVENT project). A.L.G. is supported by the Fondation Leducq. C.A.M.R. is supported by the Leducq Foundation and Burroughs Wellecome Fund. A.A.W. is supported by the Dutch Heart Foundation (CVON PREDICT2 project). J.-J.S. is supported by the Fondation pour la Recherche Medicale (DEQ20140329545). R.R. and P.G. are supported by the National Agency for Research (ANR-GENSUD-14-CE10-0001). C.R.B. is supported by the Dutch Heart Foundation (CVON PREDICT2 project), the Netherlands Organization for Scientific Research (VICI fellowship, 016.150.610) and Fondation Leducq (17CVD02).
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- 2022
43. Chapter 7 - Automated Delineation of Brain Structures with Snakes in PET
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Mykkänen, Jouni M., Tohka, Jussi, and Ruotsalainen, Ulla
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44. Independent compartmentalization of functional, metabolic, and transcriptional maturation of hiPSC-derived cardiomyocytes.
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Fetterman KA, Blancard M, Lyra-Leite DM, Vanoye CG, Fonoudi H, Jouni M, DeKeyser JL, Lenny B, Sapkota Y, George AL Jr, and Burridge PW
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- Humans, Culture Media, Cells, Cultured, Transcription, Genetic, Cell Culture Techniques methods, Myocytes, Cardiac metabolism, Myocytes, Cardiac cytology, Induced Pluripotent Stem Cells metabolism, Induced Pluripotent Stem Cells cytology, Cell Differentiation
- Abstract
Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) recapitulate numerous disease and drug response phenotypes, but cell immaturity may limit their accuracy and fidelity as a model system. Cell culture medium modification is a common method for enhancing maturation, yet prior studies have used complex media with little understanding of individual component contribution, which may compromise long-term hiPSC-CM viability. Here, we developed high-throughput methods to measure hiPSC-CM maturation, determined factors that enhanced viability, and then systematically assessed the contribution of individual maturation medium components. We developed a medium that is compatible with extended culture. We discovered that hiPSC-CM maturation can be sub-specified into electrophysiological/EC coupling, metabolism, and gene expression and that induction of these attributes is largely independent. In this work, we establish a defined baseline for future studies of cardiomyocyte maturation. Furthermore, we provide a selection of medium formulae, optimized for distinct applications and priorities, that promote measurable attributes of maturation., Competing Interests: Declaration of interests The authors declare no competing interests., (Copyright © 2024 The Author(s). Published by Elsevier Inc. All rights reserved.)
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- 2024
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45. Functional Validation of Doxorubicin-Induced Cardiotoxicity-Related Genes.
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Fonoudi H, Jouni M, Cejas RB, Magdy T, Blancard M, Ge N, Shah DA, Lyra-Leite DM, Neupane A, Gharib M, Jiang Z, Sapkota Y, and Burridge PW
- Abstract
Background: Genome-wide association studies and candidate gene association studies have identified more than 180 genetic variants statistically associated with anthracycline-induced cardiotoxicity (AIC). However, the lack of functional validation has hindered the clinical translation of these findings., Objectives: The aim of this study was to functionally validate all genes associated with AIC using human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs)., Methods: Through a systemic literature search, 80 genes containing variants significantly associated with AIC were identified. Additionally, 3 more genes with potential roles in AIC ( GSTM1 , CBR1 , and ERBB2 ) were included. Of these, 38 genes exhibited expression in human fetal heart, adult heart, and hiPSC-CMs. Using clustered regularly interspaced short palindromic repeats/Cas9-based genome editing, each of these 38 genes was systematically knocked out in control hiPSC-CMs, and the resulting doxorubicin-induced cardiotoxicity (DIC) phenotype was assessed using hiPSC-CMs. Subsequently, functional assays were conducted for each gene knockout on the basis of hypothesized mechanistic implications in DIC., Results: Knockout of 26 genes increased the susceptibility of hiPSC-CMs to DIC. Notable genes included efflux transporters ( ABCC10 , ABCC2 , ABCB4 , ABCC5 , and ABCC9 ), well-established DIC-associated genes ( CBR1 , CBR3 , and RAC2 ), and genome-wide association study-discovered genes ( RARG and CELF4 ). Conversely, knockout of ATP2B1 , HNMT , POR , CYBA , WDR4 , and COL1A2 had no significant effect on the in vitro DIC phenotype of hiPSC-CMs. Furthermore, knockout of the uptake transporters ( SLC28A3 , SLC22A17 , and SLC28A1 ) demonstrated a protective effect against DIC., Conclusions: The present findings establish a comprehensive platform for the functional validation of DIC-associated genes, providing insights for future studies in DIC variant associations and potential mechanistic targets for the development of cardioprotective drugs., Competing Interests: This work was supported by National Institutes of Health grants R01 CA220002 and R01 CA261898, American Heart Association Transformational Project Award 18TPA34230105, and the Leducq Foundation (to Dr Burridge). The authors have reported that they have no relationships relevant to the contents of this paper to disclose., (© 2024 The Authors.)
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- 2024
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46. The Role of MAPRE2 and Microtubules in Maintaining Normal Ventricular Conduction.
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Chiang DY, Verkerk AO, Victorio R, Shneyer BI, van der Vaart B, Jouni M, Narendran N, Kc A, Sampognaro JR, Vetrano-Olsen F, Oh JS, Buys E, de Jonge B, Shah DA, Kiviniemi T, Burridge PW, Bezzina CR, Akhmanova A, and MacRae CA
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- Animals, Humans, Action Potentials, Genome-Wide Association Study, Microtubule-Associated Proteins genetics, Microtubules metabolism, Myocytes, Cardiac metabolism, NAV1.5 Voltage-Gated Sodium Channel genetics, NAV1.5 Voltage-Gated Sodium Channel metabolism, Tubulin genetics, Tubulin metabolism, Zebrafish genetics, Zebrafish metabolism, Brugada Syndrome genetics, Brugada Syndrome metabolism, Induced Pluripotent Stem Cells metabolism, Voltage-Gated Sodium Channels metabolism
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Background: Brugada syndrome is associated with loss-of-function SCN5A variants, yet these account for only ≈20% of cases. A recent genome-wide association study identified a novel locus within MAPRE2 , which encodes EB2 (microtubule end-binding protein 2), implicating microtubule involvement in Brugada syndrome., Methods: A mapre2 knockout zebrafish model was generated using CRISPR/Cas9 (clustered regularly interspaced short palindromic repeats/clustered regularly interspaced short palindromic repeat-associated protein 9) and validated by Western blot. Larval hearts at 5 days post-fertilization were isolated for voltage mapping and immunocytochemistry. Adult fish hearts were used for ECG, patch clamping, and immunocytochemistry. Morpholinos were injected into embryos at 1-cell stage for knockdown experiments. A transgenic zebrafish line with cdh2 tandem fluorescent timer was used to study adherens junctions. Microtubule plus-end tracking and patch clamping were performed in human induced pluripotent stem cell derived cardiomyocytes (iPSC-CMs) with MAPRE2 knockdown and knockout, respectively., Results: Voltage mapping of mapre2 knockout hearts showed a decrease in ventricular maximum upstroke velocity of the action potential and conduction velocity, suggesting loss of cardiac voltage-gated sodium channel function. ECG showed QRS prolongation in adult knockout fish, and patch clamping showed decreased sodium current density in knockout ventricular myocytes and arrhythmias in knockout iPSC-CMs. Confocal imaging showed disorganized adherens junctions and mislocalization of mature Ncad (N-cadherin) with mapre2 loss of function, associated with a decrease of detyrosinated tubulin. MAPRE2 knockdown in iPSC-CMs led to an increase in microtubule growth velocity and distance, indicating changes in microtubule dynamics. Finally, knockdown of ttl encoding tubulin tyrosine ligase in mapre2 knockout larvae rescued tubulin detyrosination and ventricular maximum upstroke velocity of the action potential., Conclusions: Genetic ablation of mapre2 led to a decrease in voltage-gated sodium channel function, a hallmark of Brugada syndrome, associated with disruption of adherens junctions, decrease of detyrosinated tubulin as a marker of microtubule stability, and changes in microtubule dynamics. Restoration of the detyrosinated tubulin fraction with ttl knockdown led to rescue of voltage-gated sodium channel-related functional parameters in mapre2 knockout hearts. Taken together, our study implicates microtubule dynamics in the modulation of ventricular conduction., Competing Interests: Disclosures None.
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- 2024
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47. Casein Kinase 1 Phosphomimetic Mutations Negatively Impact Connexin-43 Gap Junctions in Human Pluripotent Stem Cell-Derived Cardiomyocytes.
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Al-Attar R, Jargstorf J, Romagnuolo R, Jouni M, Alibhai FJ, Lampe PD, Solan JL, and Laflamme MA
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- Adult, Animals, Humans, Mice, Connexins, Gap Junctions, Mice, Transgenic, Mutation, Casein Kinase I genetics, Connexin 43 genetics, Myocytes, Cardiac
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The transplantation of human pluripotent stem cell-derived cardiomyocytes (hPSC-CMs) has shown promise in preclinical models of myocardial infarction, but graft myocardium exhibits incomplete host-graft electromechanical integration and a propensity for pro-arrhythmic behavior. Perhaps contributing to this situation, hPSC-CM grafts show low expression of connexin 43 (Cx43), the major gap junction (GJ) protein, in ventricular myocardia. We hypothesized that Cx43 expression and function could be rescued by engineering Cx43 in hPSC-CMs with a series of phosphatase-resistant mutations at three casein kinase 1 phosphorylation sites (Cx43-S3E) that have been previously reported to stabilize Cx43 GJs and reduce arrhythmias in transgenic mice. However, contrary to our predictions, transgenic Cx43-S3E hPSC-CMs exhibited reduced Cx43 expression relative to wild-type cells, both at baseline and following ischemic challenge. Cx43-S3E hPSC-CMs showed correspondingly slower conduction velocities, increased automaticity, and differential expression of other connexin isoforms and various genes involved in cardiac excitation-contraction coupling. Cx43-S3E hPSC-CMs also had phosphorylation marks associated with Cx43 GJ internalization, a finding that may account for their impaired GJ localization. Taken collectively, our data indicate that the Cx43-S3E mutation behaves differently in hPSC-CMs than in adult mouse ventricular myocytes and that multiple biological factors likely need to be addressed synchronously to ensure proper Cx43 expression, localization, and function.
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- 2024
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48. Altered Peripheral Blood Gene Expression in Childhood Cancer Survivors With Anthracycline-Induced Cardiomyopathy - A COG-ALTE03N1 Report.
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Singh P, Shah DA, Jouni M, Cejas RB, Crossman DK, Magdy T, Qiu S, Wang X, Zhou L, Sharafeldin N, Hageman L, McKenna DE, Armenian SH, Balis FM, Hawkins DS, Keller FG, Hudson MM, Neglia JP, Ritchey AK, Ginsberg JP, Landier W, Bhatia R, Burridge PW, and Bhatia S
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- Humans, Child, Matrix Metalloproteinase 8 genetics, Matrix Metalloproteinase 8 therapeutic use, Matrix Metalloproteinase 9, Anthracyclines adverse effects, Case-Control Studies, Antibiotics, Antineoplastic adverse effects, Myocytes, Cardiac, RNA, Messenger, Gene Expression, Cancer Survivors, Neoplasms drug therapy, Neoplasms genetics, Neoplasms complications, Cardiomyopathies chemically induced, Cardiomyopathies genetics
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Background Anthracycline-induced cardiomyopathy is a leading cause of premature death in childhood cancer survivors, presenting a need to understand the underlying pathogenesis. We sought to examine differential blood-based mRNA expression profiles in anthracycline-exposed childhood cancer survivors with and without cardiomyopathy. Methods and Results We designed a matched case-control study (Children's Oncology Group-ALTE03N1) with mRNA sequencing on total RNA from peripheral blood in 40 anthracycline-exposed survivors with cardiomyopathy (cases) and 64 matched survivors without (controls). DESeq2 identified differentially expressed genes. Ingenuity Pathway Analyses (IPA) and Gene Set Enrichment Analyses determined the potential roles of altered genes in biological pathways. Functional validation was performed by gene knockout in human-induced pluripotent stem cell-derived cardiomyocytes using CRISPR/Cas9 (clustered regularly interspaced short palindromic repeats/CRISPR-associated protein 9) technology. Median age at primary cancer diagnosis for cases and controls was 8.2 and 9.7 years, respectively. Thirty-six differentially expressed genes with fold change ≥±2 were identified; 35 were upregulated. IPA identified "hepatic fibrosis" and "iron homeostasis" pathways to be significantly modulated by differentially expressed genes, including toxicology functions of myocardial infarction, cardiac damage, and cardiac dilation. Leading edge analysis from Gene Set Enrichment Analyses identified lactate dehydrogenase A ( LDHA ) and cluster of differentiation 36 ( CD36 ) genes to be significantly upregulated in cases. Interleukin 1 receptor type 1, 2 ( IL1R1 , IL1R2 ), and matrix metalloproteinase 8, 9 ( MMP8, MMP9 ) appeared in multiple canonical pathways. LDHA -knockout human-induced pluripotent stem cell-derived cardiomyocytes showed increased sensitivity to doxorubicin. Conclusions We identified differential mRNA expression profiles in peripheral blood of anthracycline-exposed childhood cancer survivors with and without cardiomyopathy. Upregulation of LDHA and CD36 genes suggests metabolic perturbations in a failing heart. Dysregulation of proinflammatory cytokine receptors IL1R1 and IL1R2 and matrix metalloproteinases, MMP8 and MMP9 indicates structural remodeling that accompanies the clinical manifestation of symptomatic cardiotoxicity.
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- 2023
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49. Identification of novel hypermethylated or hypomethylated CpG sites and genes associated with anthracycline-induced cardiomyopathy.
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Singh P, Zhou L, Shah DA, Cejas RB, Crossman DK, Jouni M, Magdy T, Wang X, Sharafeldin N, Hageman L, McKenna DE, Horvath S, Armenian SH, Balis FM, Hawkins DS, Keller FG, Hudson MM, Neglia JP, Ritchey AK, Ginsberg JP, Landier W, Burridge PW, and Bhatia S
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- Adult, Humans, Anthracyclines adverse effects, Case-Control Studies, Genome-Wide Association Study, DNA Methylation, Epigenesis, Genetic, DNA, CpG Islands, Antibiotics, Antineoplastic, Carrier Proteins genetics, Membrane Proteins genetics, Induced Pluripotent Stem Cells, Cardiomyopathies chemically induced, Cardiomyopathies genetics
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Anthracycline-induced cardiomyopathy is a leading cause of late morbidity in childhood cancer survivors. Aberrant DNA methylation plays a role in de novo cardiovascular disease. Epigenetic processes could play a role in anthracycline-induced cardiomyopathy but remain unstudied. We sought to examine if genome-wide differential methylation at 'CpG' sites in peripheral blood DNA is associated with anthracycline-induced cardiomyopathy. This report used participants from a matched case-control study; 52 non-Hispanic White, anthracycline-exposed childhood cancer survivors with cardiomyopathy were matched 1:1 with 52 survivors with no cardiomyopathy. Paired ChAMP (Chip Analysis Methylation Pipeline) with integrated reference-based deconvolution of adult peripheral blood DNA methylation was used to analyze data from Illumina HumanMethylation EPIC BeadChip arrays. An epigenome-wide association study (EWAS) was performed, and the model was adjusted for GrimAge, sex, interaction terms of age at enrollment, chest radiation, age at diagnosis squared, and cardiovascular risk factors (CVRFs: diabetes, hypertension, dyslipidemia). Prioritized genes were functionally validated by gene knockout in human induced pluripotent stem cell cardiomyocytes (hiPSC-CMs) using CRISPR/Cas9 technology. DNA-methylation EPIC array analyses identified 32 differentially methylated probes (DMP: 15 hyper-methylated and 17 hypo-methylated probes) that overlap with 23 genes and 9 intergenic regions. Three hundred and fifty-four differential methylated regions (DMRs) were also identified. Several of these genes are associated with cardiac dysfunction. Knockout of genes EXO6CB, FCHSD2, NIPAL2, and SYNPO2 in hiPSC-CMs increased sensitivity to doxorubicin. In addition, EWAS analysis identified hypo-methylation of probe 'cg15939386' in gene RORA to be significantly associated with anthracycline-induced cardiomyopathy. In this genome-wide DNA methylation profile study, we observed significant differences in DNA methylation at the CpG level between anthracycline-exposed childhood cancer survivors with and without cardiomyopathy, implicating differential DNA methylation of certain genes could play a role in pathogenesis of anthracycline-induced cardiomyopathy., (© 2023. Springer Nature Limited.)
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- 2023
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50. Cannabinoid Receptor Type 1 in Parkinson's Disease: A Positron Emission Tomography Study with [ 18 F]FMPEP-d 2 .
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Ajalin RM, Al-Abdulrasul H, Tuisku JM, Hirvonen JES, Vahlberg T, Lahdenpohja S, Rinne JO, and Brück AE
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- Antiparkinson Agents therapeutic use, Brain diagnostic imaging, Brain metabolism, Humans, Positron-Emission Tomography, Receptor, Cannabinoid, CB1 metabolism, Receptor, Cannabinoid, CB1 therapeutic use, Parkinson Disease diagnostic imaging, Parkinson Disease drug therapy, Parkinson Disease metabolism
- Abstract
Background: The endocannabinoid system is a widespread neuromodulatory system affecting several biological functions and processes. High densities of type 1 cannabinoid (CB1) receptors and endocannabinoids are found in basal ganglia, which makes them an interesting target group for drug development in basal ganglia disorders such as Parkinson's disease (PD)., Objective: The aim of this study was to investigate CB1 receptors in PD with [
18 F]FMPEP-d2 positron emission tomography (PET) and the effect of dopaminergic medication on the [18 F]FMPEP-d2 binding., Methods: The data consisted of 16 subjects with PD and 10 healthy control subjects (HCs). All participants underwent a [18 F]FMPEP-d2 high-resolution research tomograph PET examination for the quantitative assessment of cerebral binding to CB1 receptors. To investigate the effect of dopaminergic medication on the [18 F]FMPEP-d2 binding, 15 subjects with PD underwent [18 F]FMPEP-d2 PET twice, both on and off antiparkinsonian medication., Results: [18 F]FMPEP-d2 distribution volume was significantly lower in the off scan compared with the on scan in basal ganglia, thalamus, hippocampus, and amygdala (P < 0.05). Distribution volume was lower in subjects with PD off than in HCs globally (P < 0.05), but not higher than in HCs in any brain region., Conclusions: Subjects with PD have lower CB1 receptor availability compared with HCs. PD medication increases CB1 receptor toward normal levels. © 2022 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society., (© 2022 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.)- Published
- 2022
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