Kindlin-2 Regulates Mesenchymal Stem Cell Differentiation Through Control of YAP1/TAZ

Overview

Journal J Cell Biol

Specialty Cell Biology

Date 2018 Mar 3

PMID 29496737

Citations 46

Authors

Ling Guo

Ting Cai

Keng Chen

Rong Wang

Jiaxin Wang

Chunhong Cui

Jifan Yuan

Kuo Zhang

Zhongzhen Liu

Yi Deng

Guozhi Xiao

Chuanyue Wu

Affiliations

Soon will be listed here.

Abstract

Precise control of mesenchymal stem cell (MSC) differentiation is critical for tissue development and regeneration. We show here that kindlin-2 is a key determinant of MSC fate decision. Depletion of kindlin-2 in MSCs is sufficient to induce adipogenesis and inhibit osteogenesis in vitro and in vivo. Mechanistically, kindlin-2 regulates MSC differentiation through controlling YAP1/TAZ at both the transcript and protein levels. Kindlin-2 physically associates with myosin light-chain kinase in response to mechanical cues of cell microenvironment and intracellular signaling events and promotes myosin light-chain phosphorylation. Loss of kindlin-2 inhibits RhoA activation and reduces myosin light-chain phosphorylation, stress fiber formation, and focal adhesion assembly, resulting in increased Ser127 phosphorylation, nuclear exclusion, and ubiquitin ligase atrophin-1 interacting protein 4-mediated degradation of YAP1/TAZ. Our findings reveal a novel kindlin-2 signaling axis that senses the mechanical cues of cell microenvironment and controls MSC fate decision, and they suggest a new strategy to regulate MSC differentiation, tissue repair, and regeneration.

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