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1. Unexpected impairment of INa underpins reentrant arrhythmias in a knock-in swine model of Timothy syndrome

Author

Porta-Sánchez, Andreu, Mazzanti, Andrea, Tarifa, Carmen, Kukavica, Deni, Trancuccio, Alessandro, Mohsin, Muhammad, Zanfrini, Elisa, Perota, Andrea, Duchi, Roberto, Hernandez-Lopez, Kevin, Jáuregui-Abularach, Miguel Eduardo, Pergola, Valerio, Fernandez, Eugenio, Bongianino, Rossana, Tavazzani, Elisa, Gambelli, Patrick, Memmi, Mirella, Scacchi, Simone, Pavarino, Luca F., Franzone, Piero Colli, Lentini, Giovanni, Filgueiras-Rama, David, Galli, Cesare, Santiago, Demetrio Julián, and Priori, Silvia G.

Published
2023
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4. Enhanced generation of non-degenerate photon-pairs in nonlinear metasurfaces

Author

Parry, Matthew, Mazzanti, Andrea, Poddubny, Alexander, Della Valle, Giuseppe, Neshev, Dragomir N., and Sukhorukov, Andrey A.

Subjects
Physics - Optics, Quantum Physics
Abstract

We reveal a novel regime of photon-pair generation driven by the interplay of multiple bound states in the continuum resonances in nonlinear metasurfaces. This non-degenerate photon-pair generation is derived from the hyperbolic topology of the transverse phase-matching and can enable orders-of-magnitude enhancement of the photon rate and spectral brightness, as compared to the degenerate regime. We show that the entanglement of the photon-pairs can be tuned by varying the pump polarization, which can underpin future advances and applications of ultra-compact quantum light sources., Comment: 6 pages, 4 figures

Published
2021
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7. Color Routing via Cross-Polarized Detuned Plasmonic Nanoantennas in Large Area Metasurfaces

Author

Barelli, Matteo, Mazzanti, Andrea, Giordano, Maria Caterina, Della Valle, Giuseppe, and de Mongeot, Francesco Buatier

Subjects
Physics - Optics
Abstract

Bidirectional nanoantennas are of key relevance for advanced functionalities to be implemented at the nanoscale, and in particular for color routing in an ultracompact flat-optics configuration. Here we demonstrate a novel approach avoiding complex collective geometries and/or restrictive morphological parameters, based on cross-polarized detuned plasmonic nanoantennas in a uniaxial (quasi-1D) bimetallic configuration. The nanofabrication of such a flat-optics system is controlled over a large-area (cm^2) by a novel self-organized technique exploiting ion-induced nanoscale wrinkling instability on glass templates to engineer tilted bimetallic nanostrip dimers. These nanoantennas feature broadband color routing with superior light scattering directivity figures, which are well described by numerical simulations and turn out to be competitive with the response of lithographic nanoantennas. These results demonstrate that our large-area self-organized metasurfaces can be implemented in real world applications of flat optics color routing from telecom photonics to optical nanosensing., Comment: 25+8 pages, 5+4 figures

Published
2020
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9. An International Multicenter Evaluation of Inheritance Patterns, Arrhythmic Risks, and Underlying Mechanisms of CASQ2-Catecholaminergic Polymorphic Ventricular Tachycardia

Author

Ng, Kevin, Titus, Erron W, Lieve, Krystien V, Roston, Thomas M, Mazzanti, Andrea, Deiter, Frederick H, Denjoy, Isabelle, Ingles, Jodie, Till, Jan, Robyns, Tomas, Connors, Sean P, Steinberg, Christian, Abrams, Dominic J, Pang, Benjamin, Scheinman, Melvin M, Bos, J Martijn, Duffett, Stephen A, van der Werf, Christian, Maltret, Alice, Green, Martin S, Rutberg, Julie, Balaji, Seshadri, Cadrin-Tourigny, Julia, Orland, Kate M, Knight, Linda M, Brateng, Caitlin, Wu, Jeremy, Tang, Anthony S, Skanes, Allan C, Manlucu, Jaimie, Healey, Jeff S, January, Craig T, Krahn, Andrew D, Collins, Kathryn K, Maginot, Kathleen R, Fischbach, Peter, Etheridge, Susan P, Eckhardt, Lee L, Hamilton, Robert M, Ackerman, Michael J, Noguer, Ferran Rosés I, Semsarian, Christopher, Jura, Natalia, Leenhardt, Antoine, Gollob, Michael H, Priori, Silvia G, Sanatani, Shubhayan, Wilde, Arthur AM, Deo, Rahul C, and Roberts, Jason D

Subjects
Clinical Research, Cardiovascular, Genetics, Heart Disease, Aetiology, 2.1 Biological and endogenous factors, Calsequestrin, Female, Heterozygote, Homozygote, Humans, Male, Mutation, Missense, Risk Factors, Tachycardia, Ventricular, arrhythmias, cardiac, catecholaminergic polymorphic ventricular tachycardia, death, sudden, genetics, arrhythmias, cardiac, death, sudden, cardiac, Cardiorespiratory Medicine and Haematology, Clinical Sciences, Public Health and Health Services, Cardiovascular System & Hematology
Abstract

BackgroundGenetic variants in calsequestrin-2 (CASQ2) cause an autosomal recessive form of catecholaminergic polymorphic ventricular tachycardia (CPVT), although isolated reports have identified arrhythmic phenotypes among heterozygotes. Improved insight into the inheritance patterns, arrhythmic risks, and molecular mechanisms of CASQ2-CPVT was sought through an international multicenter collaboration.MethodsGenotype-phenotype segregation in CASQ2-CPVT families was assessed, and the impact of genotype on arrhythmic risk was evaluated using Cox regression models. Putative dominant CASQ2 missense variants and the established recessive CASQ2-p.R33Q variant were evaluated using oligomerization assays and their locations mapped to a recent CASQ2 filament structure.ResultsA total of 112 individuals, including 36 CPVT probands (24 homozygotes/compound heterozygotes and 12 heterozygotes) and 76 family members possessing at least 1 presumed pathogenic CASQ2 variant, were identified. Among CASQ2 homozygotes and compound heterozygotes, clinical penetrance was 97.1% and 26 of 34 (76.5%) individuals had experienced a potentially fatal arrhythmic event with a median age of onset of 7 years (95% CI, 6-11). Fifty-one of 66 CASQ2 heterozygous family members had undergone clinical evaluation, and 17 of 51 (33.3%) met diagnostic criteria for CPVT. Relative to CASQ2 heterozygotes, CASQ2 homozygote/compound heterozygote genotype status in probands was associated with a 3.2-fold (95% CI, 1.3-8.0; P=0.013) increased hazard of a composite of cardiac syncope, aborted cardiac arrest, and sudden cardiac death, but a 38.8-fold (95% CI, 5.6-269.1; P

Published
2020

10. An International Multicenter Evaluation of Type 5 Long QT Syndrome

Author

Roberts, Jason D, Asaki, S Yukiko, Mazzanti, Andrea, Bos, J Martijn, Tuleta, Izabela, Muir, Alison R, Crotti, Lia, Krahn, Andrew D, Kutyifa, Valentina, Shoemaker, M Benjamin, Johnsrude, Christopher L, Aiba, Takeshi, Marcondes, Luciana, Baban, Anwar, Udupa, Sharmila, Dechert, Brynn, Fischbach, Peter, Knight, Linda M, Vittinghoff, Eric, Kukavica, Deni, Stallmeyer, Birgit, Giudicessi, John R, Spazzolini, Carla, Shimamoto, Keiko, Tadros, Rafik, Cadrin-Tourigny, Julia, Duff, Henry J, Simpson, Christopher S, Roston, Thomas M, Wijeyeratne, Yanushi D, El Hajjaji, Imane, Yousif, Maisoon D, Gula, Lorne J, Leong-Sit, Peter, Chavali, Nikhil, Landstrom, Andrew P, Marcus, Gregory M, Dittmann, Sven, Wilde, Arthur AM, Behr, Elijah R, Tfelt-Hansen, Jacob, Scheinman, Melvin M, Perez, Marco V, Kaski, Juan Pablo, Gow, Robert M, Drago, Fabrizio, Aziz, Peter F, Abrams, Dominic J, Gollob, Michael H, Skinner, Jonathan R, Shimizu, Wataru, Kaufman, Elizabeth S, Roden, Dan M, Zareba, Wojciech, Schwartz, Peter J, Schulze-Bahr, Eric, Etheridge, Susan P, Priori, Silvia G, and Ackerman, Michael J

Subjects
Genetics, Cardiovascular, Clinical Trials and Supportive Activities, Heart Disease, Clinical Research, Human Genome, 2.1 Biological and endogenous factors, Aetiology, Adolescent, Adult, Death, Sudden, Cardiac, Electric Countershock, Electrocardiography, Female, Heart Arrest, Humans, Long QT Syndrome, Male, Middle Aged, Penetrance, Potassium Channels, Voltage-Gated, Registries, arrhythmia, genetics, long QT syndrome, penetrance, sudden cardiac death, Cardiorespiratory Medicine and Haematology, Clinical Sciences, Public Health and Health Services, Cardiovascular System & Hematology
Abstract

BackgroundInsight into type 5 long QT syndrome (LQT5) has been limited to case reports and small family series. Improved understanding of the clinical phenotype and genetic features associated with rare KCNE1 variants implicated in LQT5 was sought through an international multicenter collaboration.MethodsPatients with either presumed autosomal dominant LQT5 (N = 229) or the recessive Type 2 Jervell and Lange-Nielsen syndrome (N = 19) were enrolled from 22 genetic arrhythmia clinics and 4 registries from 9 countries. KCNE1 variants were evaluated for ECG penetrance (defined as QTc >460 ms on presenting ECG) and genotype-phenotype segregation. Multivariable Cox regression was used to compare the associations between clinical and genetic variables with a composite primary outcome of definite arrhythmic events, including appropriate implantable cardioverter-defibrillator shocks, aborted cardiac arrest, and sudden cardiac death.ResultsA total of 32 distinct KCNE1 rare variants were identified in 89 probands and 140 genotype positive family members with presumed LQT5 and an additional 19 Type 2 Jervell and Lange-Nielsen syndrome patients. Among presumed LQT5 patients, the mean QTc on presenting ECG was significantly longer in probands (476.9±38.6 ms) compared with genotype positive family members (441.8±30.9 ms, P

Published
2020

14. Genome-wide association analyses identify new Brugada syndrome risk loci and highlight a new mechanism of sodium channel regulation in disease susceptibility

Author

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 C., Lichtner, Peter, Ribasés, Marta, Meitinger, Thomas, Müller-Nurasyid, Martina, 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, 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, Jr., Alfred L., MacRae, Calum A., Burridge, Paul W., Dina, Christian, Probst, Vincent, Wilde, Arthur A., Schott, Jean-Jacques, Redon, Richard, and Bezzina, Connie R.

Published
2022
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15. Acute Myocarditis Associated With Desmosomal Gene Variants

Author

Ammirati, Enrico, Raimondi, Francesca, Piriou, Nicolas, Sardo Infirri, Loren, Mohiddin, Saidi A., Mazzanti, Andrea, Shenoy, Chetan, Cavallari, Ugo A., Imazio, Massimo, Aquaro, Giovanni Donato, Olivotto, Iacopo, Pedrotti, Patrizia, Sekhri, Neha, Van de Heyning, Caroline M., Broeckx, Glenn, Peretto, Giovanni, Guttmann, Oliver, Dellegrottaglie, Santo, Scatteia, Alessandra, Gentile, Piero, Merlo, Marco, Goldberg, Randal I., Reyentovich, Alex, Sciamanna, Christopher, Klaassen, Sabine, Poller, Wolfgang, Trankle, Cory R., Abbate, Antonio, Keren, Andre, Horowitz-Cederboim, Smadar, Cadrin-Tourigny, Julia, Tadros, Rafik, Annoni, Giuseppe A., Bonoldi, Emanuela, Toquet, Claire, Marteau, Lara, Probst, Vincent, Trochu, Jean Noël, Kissopoulou, Antheia, Grosu, Aurelia, Kukavica, Deni, Trancuccio, Alessandro, Gil, Cristina, Tini, Giacomo, Pedrazzini, Matteo, Torchio, Margherita, Sinagra, Gianfranco, Gimeno, Juan Ramón, Bernasconi, Davide, Valsecchi, Maria Grazia, Klingel, Karin, Adler, Eric D., Camici, Paolo G., and Cooper, Leslie T., Jr.

Published
2022
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17. A Clinical Diagnostic Test for Calcium Release Deficiency Syndrome.

Author

Ni, Mingke, Dadon, Ziv, Ormerod, Julian O. M., Saenen, Johan, Hoeksema, Wiert F., Antiperovitch, Pavel, Tadros, Rafik, Christiansen, Morten K., Steinberg, Christian, Arnaud, Marine, Tian, Shanshan, Sun, Bo, Estillore, John Paul, Wang, Ruiwu, Khan, Habib R., Roston, Thomas M., Mazzanti, Andrea, Giudicessi, John R., Siontis, Konstantinos C., and Alak, Aiman

Subjects
ARRHYTHMIA, SUPRAVENTRICULAR tachycardia, DIAGNOSIS methods, VENTRICULAR tachycardia, CARDIAC pacing, CARDIAC arrest
Abstract

Key Points: Question: Cardiac arrest frequently occurs without explanation, even after a thorough clinical evaluation. Can a simple maneuver clinically diagnose calcium release deficiency syndrome (CRDS), a newly described cause of sudden death? Findings: In this international, multicenter, case-control study, a provoked measure of T-wave amplitude on an electrocardiogram ascertained cases of CRDS with high accuracy. The genetic mouse models recapitulated the human findings and suggested a pathologically large systolic calcium release from the sarcoplasmic reticulum was responsible. Meaning: These preliminary results suggest that the repolarization response on an electrocardiogram to brief tachycardia followed by a pause may effectively diagnose CRDS. Given the frequency of unexplained cardiac arrest, should these findings be confirmed in larger studies, this readily available maneuver may provide clinically actionable information. Importance: Sudden death and cardiac arrest frequently occur without explanation, even after a thorough clinical evaluation. Calcium release deficiency syndrome (CRDS), a life-threatening genetic arrhythmia syndrome, is undetectable with standard testing and leads to unexplained cardiac arrest. Objective: To explore the cardiac repolarization response on an electrocardiogram after brief tachycardia and a pause as a clinical diagnostic test for CRDS. Design, Setting, and Participants: An international, multicenter, case-control study including individual cases of CRDS, 3 patient control groups (individuals with suspected supraventricular tachycardia; survivors of unexplained cardiac arrest [UCA]; and individuals with genotype-positive catecholaminergic polymorphic ventricular tachycardia [CPVT]), and genetic mouse models (CRDS, wild type, and CPVT were used to define the cellular mechanism) conducted at 10 centers in 7 countries. Patient tracings were recorded between June 2005 and December 2023, and the analyses were performed from April 2023 to December 2023. Intervention: Brief tachycardia and a subsequent pause (either spontaneous or mediated through cardiac pacing). Main Outcomes and Measures: Change in QT interval and change in T-wave amplitude (defined as the difference between their absolute values on the postpause sinus beat and the last beat prior to tachycardia). Results: Among 10 case patients with CRDS, 45 control patients with suspected supraventricular tachycardia, 10 control patients who experienced UCA, and 3 control patients with genotype-positive CPVT, the median change in T-wave amplitude on the postpause sinus beat (after brief ventricular tachycardia at ≥150 beats/min) was higher in patients with CRDS (P <.001). The smallest change in T-wave amplitude was 0.250 mV for a CRDS case patient compared with the largest change in T-wave amplitude of 0.160 mV for a control patient, indicating 100% discrimination. Although the median change in QT interval was longer in CRDS cases (P =.002), an overlap between the cases and controls was present. The genetic mouse models recapitulated the findings observed in humans and suggested the repolarization response was secondary to a pathologically large systolic release of calcium from the sarcoplasmic reticulum. Conclusions and Relevance: There is a unique repolarization response on an electrocardiogram after provocation with brief tachycardia and a subsequent pause in CRDS cases and mouse models, which is absent from the controls. If these findings are confirmed in larger studies, this easy to perform maneuver may serve as an effective clinical diagnostic test for CRDS and become an important part of the evaluation of cardiac arrest. Case-control study including individual cases of calcium release deficiency syndrome (CRDS), 3 patient control groups, and genetic mouse models assesses the cardiac repolarization response on an electrocardiogram after brief tachycardia and a pause as a clinical diagnostic test for CRDS. [ABSTRACT FROM AUTHOR]

Published
2024
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18. Transmural APD heterogeneity determines ventricular arrhythmogenesis in LQT8 syndrome: Insights from Bidomain computational modeling.

Author

Scacchi, Simone, Pavarino, Luca F., Mazzanti, Andrea, Trancuccio, Alessandro, Priori, Silvia G., and Colli Franzone, Piero

Subjects
VENTRICULAR arrhythmia, LONG QT syndrome, ARRHYTHMIA, ACTION potentials, VENTRICULAR tachycardia, HETEROGENEITY, HETEROZYGOSITY
Abstract

Long QT Syndrome type 8 (LQT8) is a cardiac arrhythmic disorder associated with Timothy Syndrome, stemming from mutations in the CACNA1C gene, particularly the G406R mutation. While prior studies hint at CACNA1C mutations' role in ventricular arrhythmia genesis, the mechanisms, especially in G406R presence, are not fully understood. This computational study explores how the G406R mutation, causing increased transmural dispersion of repolarization, induces and sustains reentrant ventricular arrhythmias. Using three-dimensional numerical simulations on an idealized left-ventricular model, integrating the Bidomain equations with the ten Tusscher-Panfilov ionic model, we observe that G406R mutation with 11% and 50% heterozygosis significantly increases transmural dispersion of repolarization. During S1-S4 stimulation protocols, these gradients facilitate conduction blocks, triggering reentrant ventricular tachycardia. Sustained reentry pathways occur only with G406R mutation at 50% heterozygosis, while neglecting transmural heterogeneities of action potential duration prevents stable reentry, regardless of G406R mutation presence. [ABSTRACT FROM AUTHOR]

Published
2024
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21. Implantable cardioverter defibrillator use in arrhythmogenic right ventricular cardiomyopathy in North America and Europe

Author

Carrick, Richard T, primary, De Marco, Corrado, additional, Gasperetti, Alessio, additional, Bosman, Laurens P, additional, Gourraud, Jean-Baptiste, additional, Trancuccio, Alessandro, additional, Mazzanti, Andrea, additional, Murray, Brittney, additional, Pendleton, Catherine, additional, Tichnell, Crystal, additional, Tandri, Harikrishna, additional, Zeppenfeld, Katja, additional, Wilde, Arthur A M, additional, Davies, Brianna, additional, Seifer, Colette, additional, Roberts, Jason D, additional, Healey, Jeff S, additional, MacIntyre, Ciorsti, additional, Alqarawi, Wael, additional, Tadros, Rafik, additional, Cutler, Michael J, additional, Targetti, Mattia, additional, Calò, Leonardo, additional, Vitali, Francesco, additional, Bertini, Matteo, additional, Compagnucci, Paolo, additional, Casella, Michela, additional, Dello Russo, Antonio, additional, Cappelletto, Chiara, additional, De Luca, Antonio, additional, Stolfo, Davide, additional, Duru, Firat, additional, Jensen, Henrik K, additional, Svensson, Anneli, additional, Dahlberg, Pia, additional, Hasselberg, Nina E, additional, Di Marco, Andrea, additional, Jordà, Paloma, additional, Arbelo, Elena, additional, Moreno Weidmann, Zoraida, additional, Borowiec, Karolina, additional, Delinière, Antoine, additional, Biernacka, Elżbieta K, additional, van Tintelen, J Peter, additional, Platonov, Pyotr G, additional, Olivotto, Iacopo, additional, Saguner, Ardan M, additional, Haugaa, Kristina H, additional, Cox, Moniek, additional, Tondo, Claudio, additional, Merlo, Marco, additional, Krahn, Andrew D, additional, te Riele, Anneline S J M, additional, Wu, Katherine C, additional, Calkins, Hugh, additional, James, Cynthia A, additional, and Cadrin-Tourigny, Julia, additional

Published
2024
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24. Real‐world candidacy to mavacamten in a contemporary hypertrophic obstructive cardiomyopathy population

Author

Bertero, Edoardo, primary, Chiti, Chiara, additional, Schiavo, Maria Alessandra, additional, Tini, Giacomo, additional, Costa, Paolo, additional, Todiere, Giancarlo, additional, Mabritto, Barbara, additional, Dei, Lorenzo‐Lupo, additional, Giannattasio, Alessia, additional, Mariani, Davide, additional, Lofiego, Carla, additional, Santolamazza, Caterina, additional, Monda, Emanuele, additional, Quarta, Giovanni, additional, Barbisan, Davide, additional, Mandoli, Giulia Elena, additional, Mapelli, Massimo, additional, Sguazzotti, Maurizio, additional, Negri, Francesco, additional, De Vecchi, Simona, additional, Ciabatti, Michele, additional, Tomasoni, Daniela, additional, Mazzanti, Andrea, additional, Marzo, Francesca, additional, de Gregorio, Cesare, additional, Raineri, Claudia, additional, Vianello, Pier Filippo, additional, Marchi, Alberto, additional, Biagioni, Giulia, additional, Insinna, Eleonora, additional, Parisi, Vanda, additional, Ditaranto, Raffaello, additional, Barison, Andrea, additional, Giammaresi, Andrea, additional, De Ferrari, Gaetano Maria, additional, Priori, Silvia, additional, Metra, Marco, additional, Pieroni, Maurizio, additional, Patti, Giuseppe, additional, Imazio, Massimo, additional, Perugini, Enrica, additional, Agostoni, Piergiuseppe, additional, Cameli, Matteo, additional, Merlo, Marco, additional, Sinagra, Gianfranco, additional, Senni, Michele, additional, Limongelli, Giuseppe, additional, Ammirati, Enrico, additional, Vagnarelli, Fabio, additional, Crotti, Lia, additional, Badano, Luigi, additional, Calore, Chiara, additional, Gabrielli, Domenico, additional, Re, Federica, additional, Musumeci, Giuseppe, additional, Emdin, Michele, additional, Barbato, Emanuele, additional, Musumeci, Beatrice, additional, Autore, Camillo, additional, Biagini, Elena, additional, Porto, Italo, additional, Olivotto, Iacopo, additional, and Canepa, Marco, additional

Published
2023
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25. Engineering Azobenzene Derivatives to Control the Photoisomerization Process

Author

Aleotti, Flavia, primary, Petropoulos, Vasilis, additional, Van Overeem, Hannah, additional, Pettini, Michele, additional, Mancinelli, Michele, additional, Pecorari, Daniel, additional, Maiuri, Margherita, additional, Medri, Riccardo, additional, Mazzanti, Andrea, additional, Preda, Fabrizio, additional, Perri, Antonio, additional, Polli, Dario, additional, Conti, Irene, additional, Cerullo, Giulio, additional, and Garavelli, Marco, additional

Published
2023
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31. Simultaneous organic aerosol source apportionment at two Antarctic sites reveals large-scale and ecoregion-specific components.

Author

Paglione, Marco, Beddows, David C. S., Jones, Anna, Lachlan-Cope, Thomas, Rinaldi, Matteo, Decesari, Stefano, Manarini, Francesco, Russo, Mara, Mansour, Karam, Harrison, Roy M., Mazzanti, Andrea, Tagliavini, Emilio, and Dall'Osto, Manuel

Subjects
AEROSOLS, ATMOSPHERIC circulation, TERRITORIAL waters, AIR masses, MAGNETIC resonance, SEA ice, SUBGLACIAL lakes
Abstract

Antarctica and the Southern Ocean (SO) are the most pristine areas of the globe and represent ideal places to investigate aerosol–climate interactions in an unperturbed atmosphere. In this study, we present submicrometer aerosol (PM 1) source apportionment for two sample sets collected in parallel at the British Antarctic Survey stations of Signy and Halley during the austral summer of 2018–2019. Water-soluble organic matter (WSOM) is a major aerosol component at both sites (37 % and 29 % of water-soluble PM 1 , on average, at Signy and Halley, respectively). Remarkable differences between pelagic (open-ocean) and sympagic (influenced by sea ice) air mass histories and related aerosol sources are found. The application of factor analysis techniques to series of spectra obtained by means of proton-nuclear magnetic resonance (H-NMR) spectroscopy on the samples allows the identification of five organic aerosol (OA) sources: two primary organic aerosol (POA) types, characterized by sugars, polyols, and degradation products of lipids and associated with open-ocean and sympagic/coastal waters, respectively; two secondary organic aerosol (SOA) types, one enriched in methanesulfonic acid (MSA) and dimethylamine (DMA) and associated with pelagic waters and the other characterized by trimethylamine (TMA) and linked to sympagic environments; and a fifth component of unclear origin, possibly associated with the atmospheric aging of primary emissions. Overall, our results strongly indicate that the emissions from sympagic and pelagic ecosystems affect the variability in the submicrometer aerosol composition in the study area, with atmospheric circulation establishing marked latitudinal gradients only for some of the aerosol components (e.g., the sympagic components) while distributing the others (e.g., pelagic and/or aged components) both in maritime and inner Antarctic regions. [ABSTRACT FROM AUTHOR]

Published
2024
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32. Endocardial repolarization dispersion in BrS: A novel automatic algorithm for mapping activation recovery interval.

Author

Latrofa, Sara, Hartwig, Valentina, Bachi, Lorenzo, Notarstefano, Pasquale, Garibaldi, Silvia, Panchetti, Luca, Nesti, Martina, Seghetti, Paolo, Startari, Umberto, Mirizzi, Gianluca, Morelli, Maria Sole, Modena, Martina, Mazzanti, Andrea, Emdin, Michele, Giannoni, Alberto, and Rossi, Andrea

Subjects
BRUGADA syndrome diagnosis, ACTION potentials, DESCRIPTIVE statistics, SIGNAL processing, ENDOCARDIUM, HEART conduction system, ELECTROCARDIOGRAPHY, CONVALESCENCE, VENTRICULAR arrhythmia, ELECTRIC stimulation, AUTOMATION, CARDIAC pacing, ALGORITHMS, ELECTROPHYSIOLOGY, MYOCARDIAL depressants
Abstract

Introduction: Repolarization dispersion in the right ventricular outflow tract (RVOT) contributes to the type‐1 electrocardiographic (ECG) phenotype of Brugada syndrome (BrS), while data on the significance and feasibility of mapping repolarization dispersion in BrS patients are scarce. Moreover, the role of endocardial repolarization dispersion in BrS is poorly investigated. We aimed to assess endocardial repolarization patterns through an automated calculation of activation recovery interval (ARI) estimated on unipolar electrograms (UEGs) in spontaneous type‐1 BrS patients and controls; we also investigated the relation between ARI and right ventricle activation time (RVAT), and T‐wave peak‐to‐end interval (Tpe) in BrS patients. Methods: Patients underwent endocardial high‐density electroanatomical mapping (HDEAM); BrS showing an overt type‐1 ECG were defined as OType1, while those without (latent type‐1 ECG and LType1) received ajmaline infusion. BrS patients only underwent programmed ventricular stimulation (PVS). Data were elaborated to obtain ARI corrected with the Bazett formula (ARIc), while RVAT was derived from activation maps. Results: 39 BrS subjects (24 OType1 and 15 LTtype1) and 4 controls were enrolled. OType1 and post‐ajmaline LType1 showed longer mean ARIc than controls (306 ± 27.3 ms and 333.3 ± 16.3 ms vs. 281.7 ± 10.3 ms, p = .05 and p < .001, respectively). Ajmaline induced a significant prolongation of ARIc compared to pre‐ajmaline LTtype1 (333.3 ± 16.3 vs. 303.4 ± 20.7 ms, p < .001) and OType1 (306 ± 27.3 ms, p < .001). In patients with type‐1 ECG (OTtype1 and post‐ajmaline LType1) ARIc correlated with RVAT (r = .34, p = .04) and Tpec (r = .60, p < .001), especially in OType1 subjects (r = .55, p = .008 and r = .65 p < .001, respectively). Conclusion: ARIc mapping demonstrates increased endocardial repolarization dispersion in RVOT in BrS. Endocardial ARIc positively correlates with RVAT and Tpec, especially in OType1. [ABSTRACT FROM AUTHOR]

Published
2024
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33. Plasmonic control of drug release efficiency in agarose gel loaded with gold nanoparticle assemblies

Author

Moretti Luca, Mazzanti Andrea, Rossetti Arianna, Schirato Andrea, Polito Laura, Pizzetti Fabio, Sacchetti Alessandro, Cerullo Giulio, Della Valle Giuseppe, Rossi Filippo, and Maiuri Margherita

Subjects
drug delivery, gold nanoparticles, hot electrons, nanoheaters, plasmonics, ultrafast spectroscopy, Physics, QC1-999
Abstract

Plasmonic nanoparticles (NPs) are exploited to concentrate light, provide local heating and enhance drug release when coupled to smart polymers. However, the role of NP assembling in these processes is poorly investigated, although their superior performance as nanoheaters has been theoretically predicted since a decade. Here we report on a compound hydrogel (agarose and carbomer 974P) loaded with gold NPs of different configurations. We investigate the dynamics of light-heat conversion in these hybrid plasmonic nanomaterials via a combination of ultrafast pump-probe spectroscopy and hot-electrons dynamical modeling. The photothermal study ascertains the possibility to control the degree of assembling via surface functionalization of the NPs, thus enabling a tuning of the photothermal response of the plasmon-enhanced gel under continuous wave excitation. We exploit these assemblies to enhance photothermal release of drug mimetics with large steric hindrance loaded in the hydrogel. Using compounds with an effective hydrodynamic diameter bigger than the mesh size of the gel matrix, we find that the nanoheaters assemblies enable a two orders of magnitude faster cumulative drug release toward the surrounding environment compared to isolated NPs, under the same experimental conditions. Our results pave the way for a new paradigm of nanoplasmonic control over drug release.

Published
2020
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35. Supplementary material to "Simultaneous organic aerosol source apportionment at two Antarctic sites reveals large-scale and eco-region specific components"

Author

Paglione, Marco, primary, Beddows, David C. S., additional, Jones, Anna, additional, Lachlan-Cope, Thomas, additional, Rinaldi, Matteo, additional, Decesari, Stefano, additional, Manarini, Francesco, additional, Russo, Mara, additional, Mansour, Karam, additional, Harrison, Roy M., additional, Mazzanti, Andrea, additional, Tagliavini, Emilio, additional, and Dall'Osto, Manuel, additional

Published
2023
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36. Simultaneous organic aerosol source apportionment at two Antarctic sites reveals large-scale and eco-region specific components

Author

Paglione, Marco, primary, Beddows, David C. S., additional, Jones, Anna, additional, Lachlan-Cope, Thomas, additional, Rinaldi, Matteo, additional, Decesari, Stefano, additional, Manarini, Francesco, additional, Russo, Mara, additional, Mansour, Karam, additional, Harrison, Roy M., additional, Mazzanti, Andrea, additional, Tagliavini, Emilio, additional, and Dall'Osto, Manuel, additional

Published
2023
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39. Induction of ventricular fibrillation during programmed ventricular stimulation in a patient with CASQ2 heterozygous mutation.

Author

Frontera, Antonio, Mazzanti, Andrea, Belhassen, Bernard, and Priori, Silvia

Abstract

Introduction Results Conclusions We report the case of a 37‐year‐old male athlete, who developed during exercise atrial and ventricular arrhythmias. No structural heart disease.Invasive programmed ventricular stimulation induced ventricular fibrillation. A heterozygous mutation in the CASQ2 gene (c.775G>T, p.E259X) was found.The findings in our patient may suggest some increased ventricular excitability using programmed ventricular stimulation in CASQ2 polymorphic ventricular tachycardia patients. [ABSTRACT FROM AUTHOR]

Published
2024
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40. Ethnic differences in patients with Brugada syndrome and arrhythmic events: New insights from Survey on Arrhythmic Events in Brugada Syndrome

Author

Milman, Anat, Andorin, Antoine, Postema, Pieter G., Gourraud, Jean-Baptiste, Sacher, Frederic, Mabo, Philippe, Kim, Sung-Hwan, Maeda, Shingo, Takahashi, Yoshihide, Kamakura, Tsukasa, Aiba, Takeshi, Conte, Giulio, Juang, Jimmy J.M., Leshem, Eran, Michowitz, Yoav, Fogelman, Rami, Hochstadt, Aviram, Mizusawa, Yuka, Giustetto, Carla, Arbelo, Elena, Huang, Zhengrong, Corrado, Domenico, Delise, Pietro, Allocca, Giuseppe, Takagi, Masahiko, Wijeyeratne, Yanushi D., Mazzanti, Andrea, Brugada, Ramon, Casado-Arroyo, Ruben, Champagne, Jean, Calo, Leonardo, Sarquella-Brugada, Georgia, Jespersen, Camilla H., Tfelt-Hansen, Jacob, Veltmann, Christian, Priori, Silvia G., Behr, Elijah R., Yan, Gan-Xin, Brugada, Josep, Gaita, Fiorenzo, Wilde, Arthur A.M., Brugada, Pedro, Kusano, Kengo F., Hirao, Kenzo, Nam, Gi-Byoung, Probst, Vincent, and Belhassen, Bernard

Published
2019
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43. Characterization and Management of Arrhythmic Events in Young Patients With Brugada Syndrome

Author

Michowitz, Yoav, Milman, Anat, Andorin, Antoine, Sarquella-Brugada, Georgia, Gonzalez Corcia, M. Cecilia, Gourraud, Jean-Baptiste, Conte, Giulio, Sacher, Frederic, Juang, Jimmy J.M., Kim, Sung-Hwan, Leshem, Eran, Mabo, Philippe, Postema, Pieter G., Hochstadt, Aviram, Wijeyeratne, Yanushi D., Denjoy, Isabelle, Giustetto, Carla, Mizusawa, Yuka, Huang, Zhengrong, Jespersen, Camilla H., Maeda, Shingo, Takahashi, Yoshihide, Kamakura, Tsukasa, Aiba, Takeshi, Arbelo, Elena, Mazzanti, Andrea, Allocca, Giuseppe, Brugada, Ramon, Casado-Arroyo, Ruben, Champagne, Jean, Priori, Silvia G., Veltmann, Christian, Delise, Pietro, Corrado, Domenico, Brugada, Josep, Kusano, Kengo F., Hirao, Kenzo, Calo, Leonardo, Takagi, Masahiko, Tfelt-Hansen, Jacob, Yan, Gan-Xin, Gaita, Fiorenzo, Leenhardt, Antoine, Behr, Elijah R., Wilde, Arthur A.M., Nam, Gi-Byoung, Brugada, Pedro, Probst, Vincent, and Belhassen, Bernard

Published
2019
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44. Author Correction: Genome-wide association analyses identify new Brugada syndrome risk loci and highlight a new mechanism of sodium channel regulation in disease susceptibility

Author

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, 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, 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, Jr., Alfred L., MacRae, Calum A., Burridge, Paul W., Dina, Christian, Probst, Vincent, Wilde, Arthur A., Schott, Jean-Jacques, Redon, Richard, and Bezzina, Connie R.

Published
2022
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48. Interplay Between Genetic Substrate, QTc Duration, and Arrhythmia Risk in Patients With Long QT Syndrome

Author

Mazzanti, Andrea, Maragna, Riccardo, Vacanti, Gaetano, Monteforte, Nicola, Bloise, Raffaella, Marino, Maira, Braghieri, Lorenzo, Gambelli, Patrick, Memmi, Mirella, Pagan, Eleonora, Morini, Massimo, Malovini, Alberto, Ortiz, Martin, Sacilotto, Luciana, Bellazzi, Riccardo, Monserrat, Lorenzo, Napolitano, Carlo, Bagnardi, Vincenzo, and Priori, Silvia G.

Published
2018
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