An initial blueprint for myogenic differentiation.

TitleAn initial blueprint for myogenic differentiation.
Publication TypeJournal Article
Year of Publication2005
AuthorsBlais A, Tsikitis M, Acosta-Alvear D, Sharan R, Kluger Y, Dynlacht BDavid
JournalGenes Dev
Date Published2005 Mar 1
KeywordsCell Differentiation, Cell Line, DNA-Binding Proteins, Gene Expression Profiling, Gene Expression Regulation, Developmental, MEF2 Transcription Factors, Muscle Development, Myoblasts, MyoD Protein, Myogenic Regulatory Factors, Myogenin, Neuromuscular Junction, Oligonucleotide Array Sequence Analysis, Transcription Factors, Transcription, Genetic

We have combined genome-wide transcription factor binding and expression profiling to assemble a regulatory network controlling the myogenic differentiation program in mammalian cells. We identified a cadre of overlapping and distinct targets of the key myogenic regulatory factors (MRFs)--MyoD and myogenin--and Myocyte Enhancer Factor 2 (MEF2). We discovered that MRFs and MEF2 regulate a remarkably extensive array of transcription factor genes that propagate and amplify the signals initiated by MRFs. We found that MRFs play an unexpectedly wide-ranging role in directing the assembly and usage of the neuromuscular junction. Interestingly, these factors also prepare myoblasts to respond to diverse types of stress. Computational analyses identified novel combinations of factors that, depending on the differentiation state, might collaborate with MRFs. Our studies suggest unanticipated biological insights into muscle development and highlight new directions for further studies of genes involved in muscle repair and responses to stress and damage.

Alternate JournalGenes Dev.
PubMed ID15706034
PubMed Central IDPMC551576
Grant List1R01GM06713201 / GM / NIGMS NIH HHS / United States