ArticleMolecular and cellular biology2011
Gamma interferon modulates myogenesis through the major histocompatibility complex class II transactivator, CIITA.
Article in Molecular and cellular biology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers.
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Who cites it
49 citing papers in PubMed, 86 citations in OpenAlex.
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Corrections and comments
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Authors and funding
2 authors at 2 institutions in 1 country.
Funding
Abstract
Gamma interferon (IFN-γ) is an inflammatory cytokine that has complex effects on myogenesis. Here, we show that the IFN-γ-induced inhibition of myogenesis is mediated by the major histocompatibility complex (MHC) class II transactivator, CIITA, which binds to myogenin and inhibits its activity. In IFN-γ-treated myoblasts, the inhibition of muscle-specific genes includes the expression of myogenin itself, while in myotubes, myogenin expression is unaffected. Thus, CIITA appears to act by both repressing the expression and inhibiting the activity of myogenin at different stages of myogenesis. Stimulation by IFN-γ in skeletal muscle cells induces CIITA expression as well as MHC class II gene expression. The IFN-γ-mediated repression is reversible, with myogenesis proceeding normally upon removal of IFN-γ. Through overexpression studies, we confirm that the expression of CIITA, independent of IFN-γ, is sufficient to inhibit myogenesis. Through knockdown studies, we also demonstrate that CIITA is necessary for the IFN-γ-mediated inhibition of myogenesis. Finally, we show that CIITA, which lacks DNA binding activity, is recruited to muscle-specific promoters coincident with reductions in RNA polymerase II recruitment. Thus, this work reveals how IFN-γ modulates myogenesis and demonstrates a key role for CIITA in this process.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.