CCN2: a mechanosignaling sensor modulating integrin-dependent connective tissue remodeling in fibroblasts?, 2013
Topics: Mechanotransduction, Fibrosis, CCN2, CTGF, CCN family, Integrins
Authors: Andrew Leask
Abstract
Tensegrity (tensional integrity) is an emerging concept governing the structure of the body. Integrin-mediated mechanical tension is essential for connective tissue function in vivo. For example, in adult skin fibroblasts, the integrin β1 subunit mediates adhesion to collagen and fibronectin. Moreover, integrin β1, through its abilities to activate latent TGFβ1 and promote collagen production through focal adhesion kinase/rac1/nicotinamide adenine dinucleotide phosphate oxidase (NOX)/reactive oxygen species (ROS), is essential for dermal homeostasis, repair and fibrosis. The integrin β1-interacting protein CCN2, a member of the CCN family of proteins, is induced by TGFβ1; yet, CCN2 is not a simple downstream mediator of TGFβ1, but instead synergistically promote TGFβ1-induced adhesive signaling and fibrosis. Due to its selective ability to sense mechanical forces in the microenvironment, CCN2 may represent an exquisitely precise target for therapeutic intervention.
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