Chromatin remodeling and histone modification in the conversion of oligodendrocyte precursors to neural stem cells.
We showed previously that purified rat oligodendrocyte precursor cells (OPCs) can be induced by extracellular signals to convert to multipotent neural stem-like cells (NSLCs), which can then generate both neurons and glial cells. Because the conversion of precursor cells to stem-like cells is of both intellectual and practical interest, it is important to understand its molecular basis. We show here that the conversion of OPCs to NSLCs depends on the reactivation of the sox2 gene, which in turn depends on the recruitment of the tumor suppressor protein Brca1 and the chromatin-remodeling protein Brahma (Brm) to an enhancer in the sox2 promoter. Moreover, we show that the conversion is associated with the modification of Lys 4 and Lys 9 of histone H3 at the same enhancer. Our findings suggest that the conversion of OPCs to NSLCs depends on progressive chromatin remodeling, mediated in part by Brca1 and Brm.
Kondo
Toru
T
Medical Research Council Laboratory for Molecular Cell Biology, Cell Biology Unit, University College London, London WC1E 6BT, United Kingdom. tk294@cam.ac.uk
Raff
Martin
M
D000818:Animals; D001483:Base Sequence; D002454:Cell Differentiation; D049109:Cell Proliferation; D002843:Chromatin / Q000378:metabolism*; D017931:DNA Primers; D006657:Histones / Q000378:metabolism*; D007150:Immunohistochemistry; D047468:Immunoprecipitation; D009836:Oligodendroglia / Q000166:cytology*; D012333:RNA, Messenger / Q000235:genetics; D051381:Rats; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013234:Stem Cells / Q000166:cytology*
D002843:Chromatin; D017931:DNA Primers; D006657:Histones; D012333:RNA, Messenger