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313 results on '"Cullin, Christophe"'

1. Detection of short DNA sequences with DNA nanopores

Author

Yang, Luyan, Cullin, Christophe, and Elezgaray, Juan

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Biological Physics
Abstract

Several studies suggest strong correlation between different types of cancer and the relative concentration of short circulating RNA sequences (miRNA). Because of short length and low concentration, miRNA detection is not easy. Standard methods such as RT-PCR require both the standard PCR amplification step and a preliminary additional step of reverse transcription. In this paper, we investigate the use of DNA nanopores as a tool to detect short oligonucleotide sequences at the single molecule level. These nanostructures show two different conformations depending on the presence of DNA analogues of miRNA sequences. By monitoring current across a lipid bilayer, we show that this change of conformation translates to different levels of conductivity.

Published
2021

4. Vesikulärer Transport

Author

Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, Raguénès-Nicol, Céline, Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, and Raguénès-Nicol, Céline

Published
2014
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5. Zellmembranen

Author

Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, Raguénès-Nicol, Céline, Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, and Raguénès-Nicol, Céline

Published
2014
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10. Regulation der Genexpression

Author

Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, Raguénès-Nicol, Céline, Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, and Raguénès-Nicol, Céline

Published
2014
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11. Von der DNA zum Protein

Author

Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, Raguénès-Nicol, Céline, Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, and Raguénès-Nicol, Céline

Published
2014
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12. Struktur der DNA

Author

Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, Raguénès-Nicol, Céline, Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, and Raguénès-Nicol, Céline

Published
2014
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13. Grundlagen der Zellbiologie

Author

Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, Raguénès-Nicol, Céline, Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, and Raguénès-Nicol, Céline

Published
2014
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14. Biochemie und Bioenergetik

Author

Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, Raguénès-Nicol, Céline, Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, and Raguénès-Nicol, Céline

Published
2014
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16. Cytoskelett

Author

Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, Raguénès-Nicol, Céline, Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, and Raguénès-Nicol, Céline

Published
2014
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17. Krebs

Author

Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, Raguénès-Nicol, Céline, Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, and Raguénès-Nicol, Céline

Published
2014
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18. Immunsystem

Author

Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, Raguénès-Nicol, Céline, Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, and Raguénès-Nicol, Céline

Published
2014
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19. Zellzyklus und Apoptose

Author

Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, Raguénès-Nicol, Céline, Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, and Raguénès-Nicol, Céline

Published
2014
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27. The [URE3] prion is not conserved among Saccharomyces species

Author

Talarek, Nicolas, Maillet, Laurent, Cullin, Christophe, and Aigle, Michel

Subjects
Brewer's yeast -- Research, Prions -- Research, Biological sciences
Abstract

The [URE3] prion of Saccharomyces cerevisiae is a self-propagating inactive form of the nitrogen catabolism regulator Ure2p. To determine whether the [URE3] prion is conserved in S. cerevisiae-related yeast species, we have developed genetic tools allowing the detection of [URE3] in Saccharomyces paradoxus and Saccharomyces uvarum. We found that [URE3] is conserved in S. uvarum. In contrast, [URE3] was not detected in S. paradoxus. The inability of S. paradoxus Ure2p to switch to a prion isoform results from the primary sequence of the protein and not from the lack of cellular cofactors as heterologous Ure2p can propagate [URE3] in this species. Our data therefore demonstrate that [URE3] is conserved only in a subset of Saccharomyces species. Implications of our finding on the physiological and evolutionary meaning of the yeast [URE3] priori are discussed.

Published
2005

33. Stability, folding, dimerization, and assembly properties of the yeast prion Ure2p

Author

Thual, Carine, Bousset, Luc, Komar, Anton A., Walter, Stefan, Buchner, Johannes, Cullin, Christophe, and Melki, Ronald

Subjects
Proteins -- Conformation, Enzymes -- Structure-activity relationship, Prions -- Analysis, Yeast -- Research, Biological sciences, Chemistry
Abstract

Research examines the intramolecular interaction and molecular basis of the propagation mechanism of yeast prion Ure2p. Results demonstrate that Ure2p dimerizes via its C-terminal region and its N-terminal facilitates assembly of the protein and subsequent formation of the amyloid fibrils.

Published
2001

36. Microfluidic diffusional sizing probes lipid nanodiscs formation

Author

Azouz, Mehdi, primary, Gonin, Mathilde, additional, Fiedler, Sebastian, additional, Faherty, Jonathan, additional, Decossas, Marion, additional, Cullin, Christophe, additional, Villette, Sandrine, additional, Lafleur, Michel, additional, D. Alves, Isabel, additional, Lecomte, Sophie, additional, and Ciaccafava, Alexandre, additional

Published
2020
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37. Cholesterol impacts chemokine CCR5 receptor ligand‐binding activity

Author

Calmet, Pierre, primary, Cullin, Christophe, additional, Cortès, Sandra, additional, Vang, Maylou, additional, Caudy, Nada, additional, Baccouch, Rim, additional, Dessolin, Jean, additional, Maamar, Nada Taib, additional, Lecomte, Sophie, additional, Tillier, Bruno, additional, and Alves, Isabel D., additional

Published
2019
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38. Biologie cellulaire et moléculaire : Le cours Ed. 3

Author

Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, Boujard, Daniel, Boujard, Daniel, Anselme, Bruno, Cullin, Christophe, and Boujard, Daniel

Abstract

Cet ouvrage présente en 200 fiches l'ensemble des notions de biologie cellulaire et moléculaire enseignées dans les premières années d'études supérieures (Sciences de la Vie et de la Santé). La présentation est adaptée aux besoins des étudiants préparant un examen ou un concours : fiches synthétiques pour comprendre, QCM pour s'évaluer, exercices corrigés pour s'entraîner. Des fiches techniques" et des encarts biomédicaux complètent le cours. Des QCM supplémentaires et un annuaire de sites web spécialisés sont disponibles sur la page de l'ouvrage sur dunod.com. "

Published
2019

39. PIP2 Phospholipid-Induced Aggregation of Tau Filaments Probed by Tip-Enhanced Raman Spectroscopy

Author

Talaga, David, SMERALDA, Willy, Lescos, Laurie, Hunel, Julien, Lepejova-Caudy, Nad'a, Cullin, Christophe, Bonhommeau, Sébastien, Lecomte, Sophie, Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Chimie et Biologie des Membranes et des Nanoobjets (CBMN), and École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB)-Institut de Chimie du CNRS (INC)-Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS)

Subjects
lipids (amino acids, peptides, and proteins), [CHIM.MATE]Chemical Sciences/Material chemistry
Abstract

The morphology and secondary structure of peptide fibers formed by aggregation of tubulin-associated unit (Tau) fragments (K18), in the presence of the inner cytoplasmic membrane phosphatidylinositol component (PIP2 ) or heparin sodium (HS) as cofactors, are determined with nanoscale (

Published
2018

40. Front. Mol. Neurosci

Author

FRUHMANN, Gernot, MARCHAL, Christelle, VIGNAUD, Helene, VERDUYCKT, Mathias, TALAREK, Nicolas, DE VIRGILIO, Claudio, WINDERICKX, Joris, CULLIN, Christophe, Chimie et Biologie des Membranes et des Nanoobjets (CBMN), and Université Sciences et Technologies - Bordeaux 1-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB)-Centre National de la Recherche Scientifique (CNRS)

Subjects
amyloid beta, membrane repair, Aβ42, Saccharomyces cerevisiae, [CHIM.MATE]Chemical Sciences/Material chemistry, yeast, Alzheimer’s disease, ESCRT
Abstract

A beta metabolism plays a pivotal role in Alzheimer's disease. Here, we used a yeast model to monitor A beta(42) toxicity when entering the secretory pathway and demonstrate that processing in, and exit from the endoplasmic reticulum (ER) is required to unleash the full A beta(42) toxic potential. Consistent with previously reported data, our data suggests that A beta(42) interacts with mitochondria, thereby enhancing formation of reactive oxygen species and eventually leading to cell demise. We used our model to search for genes that modulate this deleterious effect, either by reducing or enhancing A beta(42) toxicity, based on screening of the yeast knockout collection. This revealed a reduced A beta(42) toxicity not only in strains hampered in ER-Golgi traffic and mitochondrial functioning but also in strains lacking genes connected to the cell cycle and the DNA replication stress response. On the other hand, increased A beta(42) toxicity was observed in strains affected in the actin cytoskeleton organization, endocytosis and the formation of multivesicular bodies, including key factors of the ESCRT machinery. Since the latter was shown to be required for the repair of membrane lesions in mammalian systems, we studied this aspect in more detail in our yeast model. Our data demonstrated that A beta(42) heavily disturbed the plasma membrane integrity in a strain lacking the ESCRT-III accessory factor Bro1, a phenotype that came along with a severe growth defect and enhanced loading of lipid droplets. Thus, it appears that also in yeast ESCRT is required for membrane repair, thereby counteracting one of the deleterious effects induced by the expression of A beta(42). Combined, our studies once more validated the use of yeast as a model to investigate fundamental mechanisms underlying the etiology of neurodegenerative disorders.

Published
2018

42. Guidelines and recommendations on yeast cell death nomenclature

Author

Carmona-Gutierrez, Didac, Bauer, Maria Anna, Zimmermann, Andreas, Aguilera, Andres, Austriaco, Nicanor, Ayscough, Kathryn, Balzan, Rena, Bar-Nun, Shoshana, Barrientos, Antonio, Belenky, Peter, Blondel, Marc, Braun, Ralf J., Breitenbach, Michael, Burhans, William C., Büttner, Sabrina, Cavalieri, Duccio, Chang, Michael, Cooper, Katrina F., Corte-Real, Manuela, Costa, Vitor, Cullin, Christophe, Dawes, Ian, Dengjel, Jorn, Dickman, Martin B., Eisenberg, Tobias, Fahrenkrog, Birthe, Fasel, Nicolas, Frohlich, Kai-Uwe, Gargouri, Ali, Giannattasio, Sergio, Goffrini, Paola, Gourlay, Campbell W., Grant, Chris M., Greenwood, Michael T., Guaragnella, Nicoletta, Heger, Thomas, Heinisch, Juergen, Herker, Eva, Herrmann, Johannes M., Hofer, Sebastian, Jimenez-Ruiz, Antonio, Jungwirth, Helmut, Kainz, Katharina, Kontoyiannis, Dimitrios P., Ludovico, Paula, Manon, Stephen, Martegani, Enzo, Mazzoni, Cristina, Megeney, Lynn A., Meisinger, Chris, Nielsen, Jens, Nystrom, Thomas, Osiewacz, Heinz D., Outeiro, Tiago F., Park, Hay-Oak, Pendl, Tobias, Petranovic, Dina, Picot, Stephane, Polcic, Peter, Powers, Ted, Ramsdale, Mark, Rinnerthaler, Mark, Rockenfeller, Patrick, Ruckenstuhl, Christoph, Schaffrath, Raffael, Segovia, Maria, Severin, Fedor F., Sharon, Amir, Sigrist, Stephan J., Sommer-Ruck, Cornelia, Sousa, Maria Joao, Thevelein, Johan M., Thevissen, Karin, Titorenko, Vladimir, Toledano, Michel B., Tuite, Mick, Voegtle, F. -Nora, Westermann, Benedikt, Winderickx, Joris, Wissing, Silke, Woelfl, Stefan, Zhang, Zhaojie J., Zhao, Richard Y., Zhou, Bing, Galluzzi, Lorenzo, Kroemer, Guido, Madeo, Frank, Carmona-Gutierrez, Didac, Bauer, Maria Anna, Zimmermann, Andreas, Aguilera, Andres, Austriaco, Nicanor, Ayscough, Kathryn, Balzan, Rena, Bar-Nun, Shoshana, Barrientos, Antonio, Belenky, Peter, Blondel, Marc, Braun, Ralf J., Breitenbach, Michael, Burhans, William C., Büttner, Sabrina, Cavalieri, Duccio, Chang, Michael, Cooper, Katrina F., Corte-Real, Manuela, Costa, Vitor, Cullin, Christophe, Dawes, Ian, Dengjel, Jorn, Dickman, Martin B., Eisenberg, Tobias, Fahrenkrog, Birthe, Fasel, Nicolas, Frohlich, Kai-Uwe, Gargouri, Ali, Giannattasio, Sergio, Goffrini, Paola, Gourlay, Campbell W., Grant, Chris M., Greenwood, Michael T., Guaragnella, Nicoletta, Heger, Thomas, Heinisch, Juergen, Herker, Eva, Herrmann, Johannes M., Hofer, Sebastian, Jimenez-Ruiz, Antonio, Jungwirth, Helmut, Kainz, Katharina, Kontoyiannis, Dimitrios P., Ludovico, Paula, Manon, Stephen, Martegani, Enzo, Mazzoni, Cristina, Megeney, Lynn A., Meisinger, Chris, Nielsen, Jens, Nystrom, Thomas, Osiewacz, Heinz D., Outeiro, Tiago F., Park, Hay-Oak, Pendl, Tobias, Petranovic, Dina, Picot, Stephane, Polcic, Peter, Powers, Ted, Ramsdale, Mark, Rinnerthaler, Mark, Rockenfeller, Patrick, Ruckenstuhl, Christoph, Schaffrath, Raffael, Segovia, Maria, Severin, Fedor F., Sharon, Amir, Sigrist, Stephan J., Sommer-Ruck, Cornelia, Sousa, Maria Joao, Thevelein, Johan M., Thevissen, Karin, Titorenko, Vladimir, Toledano, Michel B., Tuite, Mick, Voegtle, F. -Nora, Westermann, Benedikt, Winderickx, Joris, Wissing, Silke, Woelfl, Stefan, Zhang, Zhaojie J., Zhao, Richard Y., Zhou, Bing, Galluzzi, Lorenzo, Kroemer, Guido, and Madeo, Frank

Abstract

Elucidating the biology of yeast in its full complexity has major implications for science, medicine and industry. One of the most critical processes determining yeast life and physiology is cellular demise. However, the investigation of yeast cell death is a relatively young field, and a widely accepted set of concepts and terms is still missing. Here, we propose unified criteria for the definition of accidental, regulated, and programmed forms of cell death in yeast based on a series of morphological and biochemical criteria. Specifically, we provide consensus guidelines on the differential definition of terms including apoptosis, regulated necrosis, and autophagic cell death, as we refer to additional cell death routines that are relevant for the biology of (at least some species of) yeast. As this area of investigation advances rapidly, changes and extensions to this set of recommendations will be implemented in the years to come. Nonetheless, we strongly encourage the authors, reviewers and editors of scientific articles to adopt these collective standards in order to establish an accurate framework for yeast cell death research and, ultimately, to accelerate the progress of this vibrant field of research.

Published
2018
Full Text
View/download PDF

43. Guidelines and recommendations on yeast cell death nomenclature

Author

Carmona-Gutierrez, D, Bauer, M, Zimmermann, A, Aguilera, A, Austriaco, N, Ayscough, K, Balzan, R, Bar-Nun, S, Barrientos, A, Belenky, P, Blondel, M, Braun, R, Breitenbach, M, Burhans, W, Buettner, S, Cavalieri, D, Chang, M, Cooper, K, Côrte-Real, M, Costa, V, Cullin, C, Dawes, I, Dengjel, J, Dickman, M, Eisenberg, T, Fahrenkrog, B, Fasel, N, Froehlich, K, Gargouri, A, Giannattasio, S, Goffrini, P, Gourlay, C, Grant, C, Greenwood, M, Guaragnella, N, Heger, T, Heinisch, J, Herker, E, Herrmann, J, Hofer, S, Jiménez-Ruiz, A, Jungwirth, H, Kainz, K, Kontoyiannis, D, Ludovico, P, Manon, S, Martegani, E, Mazzoni, C, Megeney, L, Meisinger, C, Nielsen, J, Nystroem, T, Osiewacz, H, Outeiro, T, Park, H, Pendl, T, Petranovic, D, Picot, S, Polčic, P, Powers, T, Ramsdale, M, Rinnerthaler, M, Rockenfeller, P, Ruckenstuhl, C, Schaffrath, R, Segovia, M, Severin, F, Sharon, A, Sigrist, S, Sommer-Ruck, C, Sousa, M, Thevelein, J, Thevissen, K, Titorenko, V, Toledano, M, Tuite, M, Voegtle, F, Westermann, B, Winderickx, J, Wissing, S, Woelfl, S, Zhang, Z, Zhao, R, Zhou, B, Galluzzi, L, Kroemer, G, Madeo, F, Carmona-Gutierrez, Didac, Bauer, Maria Anna, Zimmermann, Andreas, Aguilera, Andrés, Austriaco, Nicanor, Ayscough, Kathryn, Balzan, Rena, Bar-Nun, Shoshana, Barrientos, Antonio, Belenky, Peter, Blondel, Marc, Braun, Ralf J., Breitenbach, Michael, Burhans, William C., Buettner, Sabrina, Cavalieri, Duccio, Chang, Michael, Cooper, Katrina F., Côrte-Real, Manuela, Costa, Vítor, Cullin, Christophe, Dawes, Ian, Dengjel, Jörn, Dickman, Martin B., Eisenberg, Tobias, Fahrenkrog, Birthe, Fasel, Nicolas, Froehlich, Kai-Uwe, Gargouri, Ali, Giannattasio, Sergio, Goffrini, Paola, Gourlay, Campbell W., Grant, Chris M., Greenwood, Michael T., Guaragnella, Nicoletta, Heger, Thomas, Heinisch, Juergen, Herker, Eva, Herrmann, Johannes M., Hofer, Sebastian, Jiménez-Ruiz, Antonio, Jungwirth, Helmut, Kainz, Katharina, Kontoyiannis, Dimitrios P., Ludovico, Paula, Manon, Stéphen, Martegani, Enzo, Mazzoni, Cristina, Megeney, Lynn A., Meisinger, Chris, Nielsen, Jens, Nystroem, Thomas, Osiewacz, Heinz D., Outeiro, Tiago F., Park, Hay-Oak, Pendl, Tobias, Petranovic, Dina, Picot, Stephane, Polčic, Peter, Powers, Ted, Ramsdale, Mark, Rinnerthaler, Mark, Rockenfeller, Patrick, Ruckenstuhl, Christoph, Schaffrath, Raffael, Segovia, Maria, Severin, Fedor F., Sharon, Amir, Sigrist, Stephan J., Sommer-Ruck, Cornelia, Sousa, Maria João, Thevelein, Johan M., Thevissen, Karin, Titorenko, Vladimir, Toledano, Michel B., Tuite, Mick, Voegtle, F. -Nora, Westermann, Benedikt, Winderickx, Joris, Wissing, Silke, Woelfl, Stefan, Zhang, Zhaojie J., Zhao, Richard Y., Zhou, Bing, Galluzzi, Lorenzo, Kroemer, Guido, Madeo, Frank, Carmona-Gutierrez, D, Bauer, M, Zimmermann, A, Aguilera, A, Austriaco, N, Ayscough, K, Balzan, R, Bar-Nun, S, Barrientos, A, Belenky, P, Blondel, M, Braun, R, Breitenbach, M, Burhans, W, Buettner, S, Cavalieri, D, Chang, M, Cooper, K, Côrte-Real, M, Costa, V, Cullin, C, Dawes, I, Dengjel, J, Dickman, M, Eisenberg, T, Fahrenkrog, B, Fasel, N, Froehlich, K, Gargouri, A, Giannattasio, S, Goffrini, P, Gourlay, C, Grant, C, Greenwood, M, Guaragnella, N, Heger, T, Heinisch, J, Herker, E, Herrmann, J, Hofer, S, Jiménez-Ruiz, A, Jungwirth, H, Kainz, K, Kontoyiannis, D, Ludovico, P, Manon, S, Martegani, E, Mazzoni, C, Megeney, L, Meisinger, C, Nielsen, J, Nystroem, T, Osiewacz, H, Outeiro, T, Park, H, Pendl, T, Petranovic, D, Picot, S, Polčic, P, Powers, T, Ramsdale, M, Rinnerthaler, M, Rockenfeller, P, Ruckenstuhl, C, Schaffrath, R, Segovia, M, Severin, F, Sharon, A, Sigrist, S, Sommer-Ruck, C, Sousa, M, Thevelein, J, Thevissen, K, Titorenko, V, Toledano, M, Tuite, M, Voegtle, F, Westermann, B, Winderickx, J, Wissing, S, Woelfl, S, Zhang, Z, Zhao, R, Zhou, B, Galluzzi, L, Kroemer, G, Madeo, F, Carmona-Gutierrez, Didac, Bauer, Maria Anna, Zimmermann, Andreas, Aguilera, Andrés, Austriaco, Nicanor, Ayscough, Kathryn, Balzan, Rena, Bar-Nun, Shoshana, Barrientos, Antonio, Belenky, Peter, Blondel, Marc, Braun, Ralf J., Breitenbach, Michael, Burhans, William C., Buettner, Sabrina, Cavalieri, Duccio, Chang, Michael, Cooper, Katrina F., Côrte-Real, Manuela, Costa, Vítor, Cullin, Christophe, Dawes, Ian, Dengjel, Jörn, Dickman, Martin B., Eisenberg, Tobias, Fahrenkrog, Birthe, Fasel, Nicolas, Froehlich, Kai-Uwe, Gargouri, Ali, Giannattasio, Sergio, Goffrini, Paola, Gourlay, Campbell W., Grant, Chris M., Greenwood, Michael T., Guaragnella, Nicoletta, Heger, Thomas, Heinisch, Juergen, Herker, Eva, Herrmann, Johannes M., Hofer, Sebastian, Jiménez-Ruiz, Antonio, Jungwirth, Helmut, Kainz, Katharina, Kontoyiannis, Dimitrios P., Ludovico, Paula, Manon, Stéphen, Martegani, Enzo, Mazzoni, Cristina, Megeney, Lynn A., Meisinger, Chris, Nielsen, Jens, Nystroem, Thomas, Osiewacz, Heinz D., Outeiro, Tiago F., Park, Hay-Oak, Pendl, Tobias, Petranovic, Dina, Picot, Stephane, Polčic, Peter, Powers, Ted, Ramsdale, Mark, Rinnerthaler, Mark, Rockenfeller, Patrick, Ruckenstuhl, Christoph, Schaffrath, Raffael, Segovia, Maria, Severin, Fedor F., Sharon, Amir, Sigrist, Stephan J., Sommer-Ruck, Cornelia, Sousa, Maria João, Thevelein, Johan M., Thevissen, Karin, Titorenko, Vladimir, Toledano, Michel B., Tuite, Mick, Voegtle, F. -Nora, Westermann, Benedikt, Winderickx, Joris, Wissing, Silke, Woelfl, Stefan, Zhang, Zhaojie J., Zhao, Richard Y., Zhou, Bing, Galluzzi, Lorenzo, Kroemer, Guido, and Madeo, Frank

Abstract

Elucidating the biology of yeast in its full complexity has major implications for science, medicine and industry. One of the most critical processes determining yeast life and physiology is cellular demise. However, the investigation of yeast cell death is a relatively young field, and a widely accepted set of concepts and terms is still missing. Here, we propose unified criteria for the definition of accidental, regulated, and programmed forms of cell death in yeast based on a series of morphological and biochemical criteria. Specifically, we provide consensus guidelines on the differential definition of terms including apoptosis, regulated necrosis, and autophagic cell death, as we refer to additional cell death routines that are relevant for the biology of (at least some species of) yeast. As this area of investigation advances rapidly, changes and extensions to this set of recommendations will be implemented in the years to come. Nonetheless, we strongly encourage the authors, reviewers and editors of scientific articles to adopt these collective standards in order to establish an accurate framework for yeast cell death research and, ultimately, to accelerate the progress of this vibrant field of research.

Published
2018

44. ERAD defects and the HFE-H63D variant are associated with increased risk of liver damages in Alpha 1-Antitrypsin Deficiency

Author

Joly, Philippe, Vignaud, Hélène, Di Martino, Julie, Ruiz, Mathias, Garin, Roman, Restier, Lioara, Belmalih, Abdelouahed, Marchal, Christelle, Cullin, Christophe, Arveiler, Benoit, Fergelot, Patricia, Gitler, Aaron, Lachaux, Alain, Couthouis, Julien, Bouchecareilh, Marion, Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM ), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Université Jean Monnet [Saint-Étienne] (UJM)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Institut de biochimie et génétique cellulaires (IBGC), Université Bordeaux Segalen - Bordeaux 2-Centre National de la Recherche Scientifique (CNRS), Physiopathologie du cancer du foie, Université Bordeaux Segalen - Bordeaux 2-Institut National de la Santé et de la Recherche Médicale (INSERM), Service de génétique médicale, Université de Bordeaux (UB)-CHU Bordeaux [Bordeaux]-Groupe hospitalier Pellegrin, Stanford University School of Medicine [Stanford], Stanford University [Stanford], Cardiovasculaire, métabolisme, diabétologie et nutrition (CarMeN), Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Hospices Civils de Lyon (HCL), Mécanismes moléculaires de l'angiogénèse, Stanford School of Medicine [Stanford], Stanford Medicine, Stanford University-Stanford University, Hospices Civils de Lyon (HCL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National de la Recherche Agronomique (INRA), and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
Liver Cirrhosis, Male, Genetic Screens, Molecular biology, [SDV]Life Sciences [q-bio], Protein Expression, Gene Identification and Analysis, lcsh:Medicine, Yeast and Fungal Models, Toxicology, Pathology and Laboratory Medicine, Medicine and Health Sciences, lcsh:Science, ComputingMilieux_MISCELLANEOUS, Liver Diseases, Endoplasmic Reticulum-Associated Degradation, Liver, Experimental Organism Systems, Saccharomyces Cerevisiae, Female, Research Article, Ubiquitin-Protein Ligases, Immunoblotting, Mutation, Missense, Molecular Probe Techniques, Surgical and Invasive Medical Procedures, Gastroenterology and Hepatology, DNA construction, Research and Analysis Methods, Protein Aggregation, Pathological, Cell Line, Saccharomyces, Digestive System Procedures, Model Organisms, alpha 1-Antitrypsin Deficiency, Gene Expression and Vector Techniques, Genetics, Humans, Hemochromatosis Protein, Molecular Biology Assays and Analysis Techniques, Transplantation, Toxicity, lcsh:R, Organisms, Fungi, Membrane Proteins, Biology and Life Sciences, Organ Transplantation, Yeast, Liver Transplantation, Molecular biology techniques, Amino Acid Substitution, Plasmid Construction, lcsh:Q
Abstract

Background The most common and severe disease causing allele of Alpha 1-Antitrypsin Deficiency (1ATD) is Z-1AT. This protein aggregates in the endoplasmic reticulum, which is the main cause of liver disease in childhood. Based on recent evidences and on the frequency of liver disease occurrence in Z-1AT patients, it seems that liver disease progression is linked to still unknown genetic factors. Methods We used an innovative approach combining yeast genetic screens with next generation exome sequencing to identify and functionally characterize the genes involved in 1ATD associated liver disease. Results Using yeast genetic screens, we identified HRD1, an Endoplasmic Reticulum Associated Degradation (ERAD) associated protein, as an inducer of Z-mediated toxicity. Whole exome sequencing of 1ATD patients resulted in the identification of two variants associated with liver damages in Z-1AT homozygous cases: HFE H63D and HERPUD1 R50H. Functional characterization in Z-1AT model cell lines demonstrated that impairment of the ERAD machinery combined with the HFE H63D variant expression decreased both cell proliferation and cell viability, while Unfolded Protein Response (UPR)-mediated cell death was hyperstimulated. Conclusion This powerful experimental pipeline allowed us to identify and functionally validate two genes involved in Z-1AT-mediated severe liver toxicity. This pilot study moves forward our understanding on genetic modifiers involved in 1ATD and highlights the UPR pathway as a target for the treatment of liver diseases associated with 1ATD. Finally, these findings support a larger scale screening for HERPUD1 R50H and HFE H63D variants in the sub-group of 1ATD patients developing significant chronic hepatic injuries (hepatomegaly, chronic cholestasis, elevated liver enzymes) and at risk developing liver cirrhosis.

Published
2017

45. Cholesterol impacts chemokine CCR5 receptor ligand‐binding activity.

Author

Calmet, Pierre, Cullin, Christophe, Cortès, Sandra, Vang, Maylou, Caudy, Nada, Baccouch, Rim, Dessolin, Jean, Maamar, Nada Taib, Lecomte, Sophie, Tillier, Bruno, and Alves, Isabel D.

Subjects
*CHEMOKINE receptors, *G protein coupled receptors, *FLUORESCENCE anisotropy, *MOLECULAR dynamics, *CHOLESTEROL, *HIV-1 glycoprotein 120
Abstract

The chemokine CCR5 receptor is target of maraviroc, a negative allosteric modulator of CCR5 that blocks the HIV protein gp120 from associating with the receptor, thereby inhibiting virus cellular entry. As noted with other G‐protein‐coupled receptor family members, the role of the lipid environment in CCR5 signaling remains obscure and very modestly investigated. Controversial literature on the impact of cholesterol (Chol) depletion in HIV infection and CCR5 signaling, including the hypothesis that Chol depletion could inhibit HIV infection, lead us to focus on the understanding of Chol impact in the first stages of receptor activation. To address this aim, the approach chosen was to employ reconstituted model lipid systems of controlled lipid composition containing CCR5 from two distinct expression systems: Pichia pastoris and cell‐free expression. The characterization of receptor/ligand interaction in terms of total binding or competition binding assays was independently performed by plasmon waveguide resonance and fluorescence anisotropy, respectively. Maraviroc, a potent receptor antagonist, was the ligand investigated. Additionally, coarse‐grained molecular dynamics simulation was employed to investigate Chol impact in the receptor‐conformational flexibility and dynamics. Results obtained with receptor produced by different expression systems and using different biophysical approaches clearly demonstrate a considerable impact of Chol in the binding affinity of maraviroc to the receptor and receptor‐conformational dynamics. Chol considerably decreases maraviroc binding affinity to the CCR5 receptor. The mechanisms by which this effect occurs seem to involve the adoption of distinct receptor‐conformational states with restrained structural dynamics and helical motions in the presence of Chol. [ABSTRACT FROM AUTHOR]

Published
2020
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50. Guidelines and recommendations on yeast cell death nomenclature

Author

Carmona-Gutierrez, Didac, primary, Bauer, Maria Anna, additional, Zimmermann, Andreas, additional, Aguilera, Andrés, additional, Austriaco, Nicanor, additional, Ayscough, Kathryn, additional, Balzan, Rena, additional, Bar-Nun, Shoshana, additional, Barrientos, Antonio, additional, Belenky, Peter, additional, Blondel, Marc, additional, Braun, Ralf J., additional, Breitenbach, Michael, additional, Burhans, William C., additional, Buettner, Sabrina, additional, Cavalieri, Duccio, additional, Chang, Michael, additional, Cooper, Katrina F., additional, Côrte-Real, Manuela, additional, Costa, Vítor, additional, Cullin, Christophe, additional, Dawes, Ian, additional, Dengjel, Jörn, additional, Dickman, Martin B., additional, Eisenberg, Tobias, additional, Fahrenkrog, Birthe, additional, Fasel, Nicolas, additional, Froehlich, Kai-Uwe, additional, Gargouri, Ali, additional, Giannattasio, Sergio, additional, Goffrini, Paola, additional, Gourlay, Campbell W., additional, Grant, Chris M., additional, Greenwood, Michael T., additional, Guaragnella, Nicoletta, additional, Heger, Thomas, additional, Heinisch, Juergen, additional, Herker, Eva, additional, Herrmann, Johannes M., additional, Hofer, Sebastian, additional, Jiménez-Ruiz, Antonio, additional, Jungwirth, Helmut, additional, Kainz, Katharina, additional, Kontoyiannis, Dimitrios P., additional, Ludovico, Paula, additional, Manon, Stéphen, additional, Martegani, Enzo, additional, Mazzoni, Cristina, additional, Megeney, Lynn A., additional, Meisinger, Chris, additional, Nielsen, Jens, additional, Nystroem, Thomas, additional, Osiewacz, Heinz D., additional, Outeiro, Tiago F., additional, Park, Hay-Oak, additional, Pendl, Tobias, additional, Petranovic, Dina, additional, Picot, Stephane, additional, Polčic, Peter, additional, Powers, Ted, additional, Ramsdale, Mark, additional, Rinnerthaler, Mark, additional, Rockenfeller, Patrick, additional, Ruckenstuhl, Christoph, additional, Schaffrath, Raffael, additional, Segovia, Maria, additional, Severin, Fedor F., additional, Sharon, Amir, additional, Sigrist, Stephan J., additional, Sommer-Ruck, Cornelia, additional, Sousa, Maria João, additional, Thevelein, Johan M., additional, Thevissen, Karin, additional, Titorenko, Vladimir, additional, Toledano, Michel B., additional, Tuite, Mick, additional, Voegtle, F.-Nora, additional, Westermann, Benedikt, additional, Winderickx, Joris, additional, Wissing, Silke, additional, Woelfl, Stefan, additional, Zhang, Zhaojie J., additional, Zhao, Richard Y., additional, Zhou, Bing, additional, Galluzzi, Lorenzo, additional, Kroemer, Guido, additional, and Madeo, Frank, additional

Published
2018
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