Fibulin-1 is Required During Cardiac Ventricular Morphogenesis for Versican Cleavage, Suppression of ErbB2 and Erk1/2 Activation, and to Attenuate Trabecular Cardiomyocyte Proliferation
Overview
Authors
Affiliations
Background: Trabeculation is an integral component of cardiac ventricular morphogenesis and is dependent on the matrix metalloproteinase, ADAMTS1. A substrate of ADAMTS1 is the proteoglycan versican which is expressed in the developing ventricle and which has been implicated in trabeculation. Fibulin-1 is a versican and ADAMTS1-binding extracellular matrix protein required for ventricular morphogenesis. Here we investigated the involvement of fibulin-1 in ADAMTS1-mediated cleavage of versican in vitro, and the involvement of fibulin-1 in versican cleavage in ventricular morphogenesis.
Results: We show that fibulin-1 is a cofactor for ADAMTS1-dependent in vitro cleavage of versican V1, yielding a 70-kDa amino-terminal fragment. Furthermore, fibulin-1-deficiency in mice was found to cause a significant reduction (>90%) in ventricular levels of the 70-kDa versican V1 cleavage product and a 2-fold increase in trabecular cardiomyocyte proliferation. Decreased versican V1 cleavage and augmented trabecular cardiomyocyte proliferation in fibulin-1 null hearts is accompanied by increased ventricular activation of ErbB2 and Erk1/2. By contrast, versican deficiency was found to lead to decreased cardiomyocyte proliferation and reduced ventricular trabeculation.
Conclusion: We conclude that fibulin-1 regulates versican-dependent events in ventricular morphogenesis by promoting ADAMTS1 cleavage of versican leading to suppression of trabecular cardiomyocyte proliferation mediated by the ErbB2-Map kinase pathway.
Gao Y, Chen T, Hong L Heliyon. 2024; 10(7):e27626.
PMID: 38560238 PMC: 10979058. DOI: 10.1016/j.heliyon.2024.e27626.
Exploring the cardiac ECM during fibrosis: A new era with next-gen proteomics.
Sarohi V, Chakraborty S, Basak T Front Mol Biosci. 2022; 9:1030226.
PMID: 36483540 PMC: 9722982. DOI: 10.3389/fmolb.2022.1030226.
Defining the versican interactome in lung health and disease.
Tang F, Brune J, Chang M, Reeves S, Altemeier W, Frevert C Am J Physiol Cell Physiol. 2022; 323(2):C249-C276.
PMID: 35649251 PMC: 9291419. DOI: 10.1152/ajpcell.00162.2022.
ADAMTS Proteins and Vascular Remodeling in Aortic Aneurysms.
Mougin Z, Huguet Herrero J, Boileau C, Le Goff C Biomolecules. 2022; 12(1).
PMID: 35053160 PMC: 8773774. DOI: 10.3390/biom12010012.
Targeting cardiomyocyte proliferation as a key approach of promoting heart repair after injury.
Li S, Ma W, Cai B Mol Biomed. 2022; 2(1):34.
PMID: 35006441 PMC: 8607366. DOI: 10.1186/s43556-021-00047-y.