Published in

BioScientifica, Journal of Molecular Endocrinology, 2(53), p. R39-R45, 2014

DOI: 10.1530/jme-14-0093

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Role of G-proteins in the differentiation of epiphyseal chondrocytes

Journal article published in 2014 by Andrei S. Chagin, Henry M. Kronenberg
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Herein, we review the regulation of differentiation of the growth plate chondrocytes by G-proteins. In connection with this, we summarize the current knowledge regarding each family of G-protein α subunit, specifically, Gαs, Gαq/11, Gα12/13, and Gαi/o. We discuss different mechanisms involved in chondrocyte differentiation downstream of G-proteins and different G-protein-coupled receptors (GPCRs) activating G-proteins in the epiphyseal chondrocytes. We conclude that among all G-proteins and GPCRs expressed by chondrocytes, Gαshas the most important role and prevents premature chondrocyte differentiation. Receptor for parathyroid hormone (PTHR1) appears to be the major activator of Gαsin chondrocytes and ablation of either one leads to accelerated chondrocyte differentiation, premature fusion of the postnatal growth plate, and ultimately short stature.