Identification of novel pathway regulation during myogenic differentiation

Joseph D. Szustakowski, Jee Hyung Lee, Christine A. Marrese, Penelope A. Kosinski, N. R. Nirmala, Daniel M. Kemp

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Stem cell differentiation is governed by extracellular signals that activate intracellular networks (or pathways) to drive phenotypic specification. Using a novel gene clustering strategy we determined pathway relationships from a genome-wide transcriptional dataset of skeletal myoblast differentiation. Established myogenic pathways, including cell contractility and cell-cycle arrest, were predicted with extreme statistical significance (p ≈ 0). In addition, gene sets associated with angiogenesis, neuronal activity, and mRNA splicing were regulated, exposing developmental and therapeutic implications. Acquisition of transcriptional data spanning the entire differentiation time course provided context for a dynamic landscape of functional pathway regulation. This novel perspective on myogenic cell differentiation revealed previously unrecognized patterns of regulation. We predict that similar analyses will facilitate ongoing efforts to define molecular mechanisms in other stem cell and developmental paradigms. Finally, by combining an iterative process of analysis with supplementation of novel pathways, this application may evolve into a powerful discovery tool.

Original languageEnglish (US)
Pages (from-to)129-138
Number of pages10
Issue number1
StatePublished - Jan 2006
Externally publishedYes


  • Differentiation
  • Myogenesis
  • Progenitor
  • Skeletal muscle
  • Stem cell

ASJC Scopus subject areas

  • Genetics


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