Transformation by activated ras or fos prevents myogenesis by inhibiting expression of MyoD1

Andrew B. Lassar, Mathew (Matt) Thayer, Robert W. Overell, Harold Weintraub

Research output: Contribution to journalArticle

204 Scopus citations


Transformation of myoblasts by activated ras inhibits myogenic differentiation. We demonstrate that this oncogene inhibits expression of the muscle regulatory factors MyoD1 and myogenin. Expression of retroviral-encoded MyoD1 in ras-transformed myoblasts leads to the re-expression of both terminal differentiation markers and lineage markers expressed in proliferating myoblasts (including endogenous MyoD1 and myogenin), suggesting that ras inhibits myogenic differentiation in a manner dependent on the loss of MyoD1 expression. In addition, we show that fos transformation of myoblasts inhibits muscle differentiation by a similar mechanism.

Original languageEnglish (US)
Pages (from-to)659-667
Number of pages9
Issue number4
Publication statusPublished - Aug 25 1989
Externally publishedYes


ASJC Scopus subject areas

  • Cell Biology
  • Molecular Biology

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