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  • Title: Overexpression of the immunoglobulin superfamily members CDO and BOC enhances differentiation of the human rhabdomyosarcoma cell line RD.
    Author: Wegorzewska M, Krauss RS, Kang JS.
    Journal: Mol Carcinog; 2003 May; 37(1):1-4. PubMed ID: 12720294.
    Abstract:
    Rhabdomyosarcoma is a childhood tumor of the skeletal muscle lineage in which cells display defects in both biochemical and morphological aspects of differentiation. The immunoglobulin superfamily members CDO and BOC are components of a cell surface receptor that positively regulates myogenesis in vitro. Expression of Cdo and Boc in myoblast cell lines is downregulated by the ras oncogene, and forced re-expression of either Cdo or Boc can override ras-induced inhibition of myogenic differentiation [Kang et al., J Cell Biol 1998; 143:403-413; Kang et al., EMBO J 2002; 21:114-124]. The current study sought to test whether the promyogenic properties of CDO and BOC could be extended to a human rhabdomyosarcoma cell line, RD. Stable overexpression of CDO or BOC in RD cells led to enhanced expression of two markers of muscle cell differentiation, troponin T and myosin heavy chain, and to increased formation of elongated, myosin heavy chain-positive myotubes. These observations are consistent with the notion that CDO and BOC play a role in the inverse relationship between differentiation and transformation of cells in the skeletal muscle lineage.
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