Evidence for cell density affecting C2C12 myogenesis: possible regulation of myogenesis by cell-cell communication.

Community effect is a phenomenon caused by cell-cell communication during myogenesis. In myogenic C2C12 cells in vitro, the confluent phase is needed for myogenesis induction. To examine the cell-density effect, growth kinetics and myogenic differentiation were investigated in cells plated at four different cell densities. We found that expression of a myogenic differentiation marker was high in a density-dependent manner. At high density, where cell-cell contact was obvious, contact inhibition after the proliferation stage was accompanied by microarray findings demonstrating upregulation of negative regulating cell-cycle markers, including CDKI p21 and the muscle differentiation markers MyoD and myogenin. Interestingly, developmentally regulated protein expression (drebrin) protein expression was also upregulated in a density-dependent manner. These results suggest that contact inhibition after the proliferation stage may induce growth arrest via cell-cell communication through the expression of CDKI p21 and may be responsible for progressing cell fusion. Copyright © 2011 Wiley Periodicals, Inc.

Citation

Kanako Tanaka, Kaori Sato, Tomomi Yoshida, Toshio Fukuda, Kenji Hanamura, Nobuhiko Kojima, Tomoaki Shirao, Takashi Yanagawa, Hideomi Watanabe. Evidence for cell density affecting C2C12 myogenesis: possible regulation of myogenesis by cell-cell communication. Muscle & nerve. 2011 Dec;44(6):968-77

Mesh Tags

PMID: 22102468

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