Abstract:
:Neuregulins comprise a group of growth factor proteins that regulate the differentiation of skeletal muscle. Here, we report that neuregulins are regulators of myogenic differentiation and stimulate mitogenesis in L6 skeletal myoblasts. The mitogenic response to neuregulin-1 was differentiation-dependent and observed only in aligned, differentiating cells. Treatment of these cells with neuregulin-1 increased [3H]thymidine incorporation and cell proliferation by 2- to 5-fold, while a minimal increase was seen in proliferating myoblasts. Neuregulin-1 did not induce DNA synthesis in fused, multinucleated myotubes. The increased DNA synthesis correlated with downregulation of myogenin and inhibition of myoblast fusion and myotube formation. These data suggest that neuregulins may regulate skeletal myogenesis in vivo and that this regulation is dependent on the state of differentiation of the myocytes.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Ford BD,Han B,Fischbach GDdoi
10.1016/s0006-291x(03)00964-1subject
Has Abstractpub_date
2003-06-20 00:00:00pages
276-81issue
1eissn
0006-291Xissn
1090-2104pii
S0006291X03009641journal_volume
306pub_type
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