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Thomas K, Ayse C, Natalia K, Peter B, Bedriye SH, Praveen G, Hakan A, Markus S, Wolfgang S, Yeong-Hoon C, Miroslav B, Manfred R. The MEK/ERK Module Is Reprogrammed in Remodeling Adult Cardiomyocytes. Int J Mol Sci 2020; 21:ijms21176348. [PMID: 32882982 PMCID: PMC7503571 DOI: 10.3390/ijms21176348] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/26/2020] [Accepted: 08/30/2020] [Indexed: 12/18/2022] Open
Abstract
Fetal and hypertrophic remodeling are hallmarks of cardiac restructuring leading chronically to heart failure. Since the Ras/Raf/MEK/ERK cascade (MAPK) is involved in the development of heart failure, we hypothesized, first, that fetal remodeling is different from hypertrophy and, second, that remodeling of the MAPK occurs. To test our hypothesis, we analyzed models of cultured adult rat cardiomyocytes as well as investigated myocytes in the failing human myocardium by western blot and confocal microscopy. Fetal remodeling was induced through endothelial morphogens and monitored by the reexpression of Acta2, Actn1, and Actb. Serum-induced hypertrophy was determined by increased surface size and protein content of cardiomyocytes. Serum and morphogens caused reprogramming of Ras/Raf/MEK/ERK. In both models H-Ras, N-Ras, Rap2, B- and C-Raf, MEK1/2 as well as ERK1/2 increased while K-Ras was downregulated. Atrophy, MAPK-dependent ischemic resistance, loss of A-Raf, and reexpression of Rap1 and Erk3 highlighted fetal remodeling, while A-Raf accumulation marked hypertrophy. The knock-down of B-Raf by siRNA reduced MAPK activation and fetal reprogramming. In conclusion, we demonstrate that fetal and hypertrophic remodeling are independent processes and involve reprogramming of the MAPK.
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Affiliation(s)
- Kubin Thomas
- Department of Cardiac Surgery, Kerckhoff Heart Center, Benekestrasse 2-8, 61231 Bad Nauheim, Germany; (C.A.); (K.N.); (G.P.); (S.M.); (C.Y.-H.)
- Campus Kerckhoff, Justus-Liebig-University Giessen, 61231 Bad Nauheim, Germany
- Correspondence: (K.T.); (B.M.); (R.M.)
| | - Cetinkaya Ayse
- Department of Cardiac Surgery, Kerckhoff Heart Center, Benekestrasse 2-8, 61231 Bad Nauheim, Germany; (C.A.); (K.N.); (G.P.); (S.M.); (C.Y.-H.)
- Campus Kerckhoff, Justus-Liebig-University Giessen, 61231 Bad Nauheim, Germany
| | - Kubin Natalia
- Department of Cardiac Surgery, Kerckhoff Heart Center, Benekestrasse 2-8, 61231 Bad Nauheim, Germany; (C.A.); (K.N.); (G.P.); (S.M.); (C.Y.-H.)
- Campus Kerckhoff, Justus-Liebig-University Giessen, 61231 Bad Nauheim, Germany
| | - Bramlage Peter
- Institute for Pharmacology and Preventive Medicine, Bahnhofstraße 20, 49661 Cloppenburg, Germany;
| | - Sen-Hild Bedriye
- Pediatric Heart Center, Justus Liebig University, Feulgenstrasse 10-12, 35392 Giessen, Germany; (S.-H.B.); (A.H.)
| | - Gajawada Praveen
- Department of Cardiac Surgery, Kerckhoff Heart Center, Benekestrasse 2-8, 61231 Bad Nauheim, Germany; (C.A.); (K.N.); (G.P.); (S.M.); (C.Y.-H.)
- Campus Kerckhoff, Justus-Liebig-University Giessen, 61231 Bad Nauheim, Germany
| | - Akintürk Hakan
- Pediatric Heart Center, Justus Liebig University, Feulgenstrasse 10-12, 35392 Giessen, Germany; (S.-H.B.); (A.H.)
| | - Schönburg Markus
- Department of Cardiac Surgery, Kerckhoff Heart Center, Benekestrasse 2-8, 61231 Bad Nauheim, Germany; (C.A.); (K.N.); (G.P.); (S.M.); (C.Y.-H.)
- Campus Kerckhoff, Justus-Liebig-University Giessen, 61231 Bad Nauheim, Germany
| | - Schaper Wolfgang
- Max-Planck-Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany;
| | - Choi Yeong-Hoon
- Department of Cardiac Surgery, Kerckhoff Heart Center, Benekestrasse 2-8, 61231 Bad Nauheim, Germany; (C.A.); (K.N.); (G.P.); (S.M.); (C.Y.-H.)
- Campus Kerckhoff, Justus-Liebig-University Giessen, 61231 Bad Nauheim, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site RhineMain, 60590 Frankfurt/Main, Germany
| | - Barancik Miroslav
- Centre of Experimental Medicine, Institute for Heart Research, Slovak Academy of Sciences, 84104 Bratislava, Slovakia
- Correspondence: (K.T.); (B.M.); (R.M.)
| | - Richter Manfred
- Department of Cardiac Surgery, Kerckhoff Heart Center, Benekestrasse 2-8, 61231 Bad Nauheim, Germany; (C.A.); (K.N.); (G.P.); (S.M.); (C.Y.-H.)
- Campus Kerckhoff, Justus-Liebig-University Giessen, 61231 Bad Nauheim, Germany
- Correspondence: (K.T.); (B.M.); (R.M.)
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