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Wang Y, Lu P, Wu B, Riascos-Bernal DF, Sibinga NES, Valenta T, Basler K, Zhou B. Myocardial β-Catenin-BMP2 signaling promotes mesenchymal cell proliferation during endocardial cushion formation. J Mol Cell Cardiol 2018; 123:150-158. [PMID: 30201295 PMCID: PMC10662972 DOI: 10.1016/j.yjmcc.2018.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 08/02/2018] [Accepted: 09/01/2018] [Indexed: 01/09/2023]
Abstract
Abnormal endocardial cushion formation is a major cause of congenital heart valve disease, which is a common birth defect with significant morbidity and mortality. Although β-catenin and BMP2 are two well-known regulators of endocardial cushion formation, their interaction in this process is largely unknown. Here, we report that deletion of β-catenin in myocardium results in formation of hypoplastic endocardial cushions accompanying a decrease of mesenchymal cell proliferation. Loss of β-catenin reduced Bmp2 expression in myocardium and SMAD signaling in cushion mesenchyme. Exogenous BMP2 recombinant proteins fully rescued the proliferation defect of mesenchymal cells in cultured heart explants from myocardial β-catenin knockout embryos. Using a canonical WNT signaling reporter mouse line, we showed that cushion myocardium exhibited high WNT/β-catenin activities during endocardial cushion growth. Selective disruption of the signaling function of β-catenin resulted in a cushion growth defect similar to that caused by the complete loss of β-catenin. Together, these observations demonstrate that myocardial β-catenin signaling function promotes mesenchymal cell proliferation and endocardial cushion expansion through inducing BMP signaling.
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Affiliation(s)
- Yidong Wang
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, China; Department of Genetics, Albert Einstein College of Medicine, Bronx, New York, United States.
| | - Pengfei Lu
- Department of Genetics, Albert Einstein College of Medicine, Bronx, New York, United States
| | - Bingruo Wu
- Department of Genetics, Albert Einstein College of Medicine, Bronx, New York, United States
| | - Dario F Riascos-Bernal
- Department of Medicine (Cardiology Division), Department of Developmental and Molecular Biology, Wilf Family Cardiovascular Research Institute, Albert Einstein College of Medicine, Bronx, New York, United States
| | - Nicholas E S Sibinga
- Department of Medicine (Cardiology Division), Department of Developmental and Molecular Biology, Wilf Family Cardiovascular Research Institute, Albert Einstein College of Medicine, Bronx, New York, United States
| | - Tomas Valenta
- Institute of Molecular Life Sciences, University of Zurich, Zurich, 8057, Switzerland
| | - Konrad Basler
- Institute of Molecular Life Sciences, University of Zurich, Zurich, 8057, Switzerland
| | - Bin Zhou
- Department of Genetics, Albert Einstein College of Medicine, Bronx, New York, United States; Department of Genetics, Pediatrics, and Medicine (Cardiology), Wilf Family Cardiovascular Research Institute, Institute for Aging Research, Albert Einstein College of Medicine, Bronx, New York 10461, United States; Department of Cardiology, First Affiliated Hospital and State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, Jiangsu, China.
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