Major contribution of the 3/6/7 class of TRPC channels to myocardial ischemia/reperfusion and cellular hypoxia/reoxygenation injuries
Abstract: The injury phase after myocardial infarcts occurs during reperfusion and is a consequence of calcium release from internal stores combined with calcium entry, leading to cell death by apoptopic and necrotic processes. The mechanism(s) by which calcium enters cells has(ve) not been identifi...
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| Autores principales: | , , , , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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National Academy of Sciences
2019
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| Acceso en línea: | https://repositorio.uca.edu.ar/handle/123456789/8529 https://www.pnas.org/content/114/23/E4582 |
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I33-R139123456789-8529 |
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dspace |
| institution |
Universidad Católica Argentina |
| institution_str |
I-33 |
| repository_str |
R-139 |
| collection |
Repositorio Institucional de la Universidad Católica Argentina (UCA) |
| language |
Inglés |
| topic |
INFARTO DEL MIOCARDIO CALCIO APOPTOSIS MUERTE CELULAR |
| spellingShingle |
INFARTO DEL MIOCARDIO CALCIO APOPTOSIS MUERTE CELULAR He, Xiju Li, Shoutian Liu, Benju Susperreguy, Sebastián Formoso, Karina Yao, Jinghong Kang, Jinsong Anbing, Shi Birnbaumer, Lutz Liao, Yanhong Major contribution of the 3/6/7 class of TRPC channels to myocardial ischemia/reperfusion and cellular hypoxia/reoxygenation injuries |
| topic_facet |
INFARTO DEL MIOCARDIO CALCIO APOPTOSIS MUERTE CELULAR |
| description |
Abstract: The injury phase after myocardial infarcts occurs during reperfusion and is a consequence of calcium release from internal stores combined with calcium entry, leading to cell death by apoptopic and necrotic processes. The mechanism(s) by which calcium enters cells has(ve) not been identified. Here, we identify canonical transient receptor potential channels (TRPC) 3 and 6 as the cation channels through which most of the damaging calcium enters cells to trigger their death, and we describe mechanisms activated during the injury phase. Working in vitro with H9c2 cardiomyoblasts subjected to 9-h hypoxia followed by 6-h reoxygenation (H/R), and analyzing changes occurring in areas-at-risk (AARs) of murine hearts subjected to a 30-min ischemia followed by 24-h reperfusion (I/R) protocol, we found: (i) that blocking TRPCwith SKF96365 significantly ameliorated damage induced by H/R, including development of the mitochondrial permeability transition and proapoptotic changes in Bcl2/BAX ratios; and (ii) that AAR tissues had increased TUNEL+ cells, augmented Bcl2/BAX ratios, and increased p(S240)NFATc3, p(S473) AKT, p(S9)GSK3β, and TRPC3 and -6 proteins, consistent with activation of a positive-feedback loop in which calcium entering through TRPCs activates calcineurin-mediated NFATc3-directed transcription of TRPC genes, leading to more Ca2+ entry. All these changes were markedly reduced in mice lacking TRPC3, -6, and -7. The changes caused by I/R in AAR tissues were matched by those seen after H/R in cardiomyoblasts in all aspects except for p-AKT and p-GSK3β, which were decreased after H/R in cardiomyoblasts instead of increased. TRPC should be promising targets for pharmacologic intervention after cardiac infarcts. |
| format |
Artículo |
| author |
He, Xiju Li, Shoutian Liu, Benju Susperreguy, Sebastián Formoso, Karina Yao, Jinghong Kang, Jinsong Anbing, Shi Birnbaumer, Lutz Liao, Yanhong |
| author_facet |
He, Xiju Li, Shoutian Liu, Benju Susperreguy, Sebastián Formoso, Karina Yao, Jinghong Kang, Jinsong Anbing, Shi Birnbaumer, Lutz Liao, Yanhong |
| author_sort |
He, Xiju |
| title |
Major contribution of the 3/6/7 class of TRPC channels to myocardial ischemia/reperfusion and cellular hypoxia/reoxygenation injuries |
| title_short |
Major contribution of the 3/6/7 class of TRPC channels to myocardial ischemia/reperfusion and cellular hypoxia/reoxygenation injuries |
| title_full |
Major contribution of the 3/6/7 class of TRPC channels to myocardial ischemia/reperfusion and cellular hypoxia/reoxygenation injuries |
| title_fullStr |
Major contribution of the 3/6/7 class of TRPC channels to myocardial ischemia/reperfusion and cellular hypoxia/reoxygenation injuries |
| title_full_unstemmed |
Major contribution of the 3/6/7 class of TRPC channels to myocardial ischemia/reperfusion and cellular hypoxia/reoxygenation injuries |
| title_sort |
major contribution of the 3/6/7 class of trpc channels to myocardial ischemia/reperfusion and cellular hypoxia/reoxygenation injuries |
| publisher |
National Academy of Sciences |
| publishDate |
2019 |
| url |
https://repositorio.uca.edu.ar/handle/123456789/8529 https://www.pnas.org/content/114/23/E4582 |
| work_keys_str_mv |
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Repositorios |
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