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CCN5/WISP2 and metabolic diseases

Journal article
Authors J. R. Grunberg
Johannes Elvin
A. Paul
Shahram Hedjazifar
Ann Hammarstedt
Ulf Smith
Published in Journal of Cell Communication and Signaling
Volume 12
Issue 1
Pages 309-318
ISSN 1873-9601
Publication year 2018
Published at Institute of Medicine, Department of Molecular and Clinical Medicine
Pages 309-318
Language en
Links dx.doi.org/10.1007/s12079-017-0437-...
Keywords Adipose tissue, Fibrosis, Insulin resistance, Metabolism, Mesenchymal stem cells, WNT-signaling, mesenchymal stem-cells, breast-cancer progression, adipose-tissue, ccn, proteins, transcriptional control, profibrotic phenotypes, hypertrophic, obesity, signaling pathway, gene-expression, beta-catenin, Cell Biology
Subject categories Cell biology, Chemistry

Abstract

Obesity and type 2 diabetes increase worldwide at an epidemic rate. It is expected that by the year 2030 around 500 million people will have diabetes; predominantly type 2 diabetes. The CCN family of proteins has become of interest in both metabolic and other common human diseases because of their effects on mesenchymal stem cell (MSCs) proliferation and differentiation as well as being important regulators of fibrosis. We here review current knowledge of the WNT1 inducible signaling pathway protein 2 (CCN5/WISP2). It has been shown to be an important regulator of both these processes through effects on both the canonical WNT and the TGF ss pathways. It is also under normal regulation by the adipogenic commitment factor BMP4, in contrast to conventional canonical WNT ligands, and allows MSCs to undergo normal adipose cell differentiation. CCN5/WISP2 is highly expressed in, and secreted by, MSCs and is an important regulator of MSCs growth. In a transgenic mouse model overexpressing CCN5/WISP2 in the adipose tissue, we have shown that it is secreted and circulating in the blood, the mice develop hypercellular white and brown adipose tissue, have increased lean body mass and enlarged hypercellular hearts. Obese transgenic mice had improved insulin sensitivity. Interestingly, the anti-fibrotic effect of CCN5/WISP2 is protective against heart failure by inhibition of the TGF ss pathway. Understanding how CCN5/WISP2 is regulated and signals is important and may be useful for developing new treatment strategies in obesity and metabolic diseases and it can also be a target in regenerative medicine.

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