RRC ID 40015
Author Gao H, Bu Y, Wu Q, Wang X, Chang N, Lei L, Chen S, Liu D, Zhu X, Hu K, Xiong JW.
Title Mecp2 regulates neural cell differentiation by suppressing the Id1 to Her2 axis in zebrafish.
Journal J Cell Sci
Abstract Rett syndrome (RTT) is a progressive neurological disorder caused by mutations in the X-linked protein methyl-CpG-binding protein 2 (MeCP2). The endogenous function of MeCP2 during neural differentiation is still unclear. Here, we report that mecp2 is required for brain development in zebrafish. Mecp2 was broadly expressed initially in embryos and enriched later in the brain. Either morpholino knockdown or genetic depletion of mecp2 inhibited neuronal differentiation, whereas its overexpression promoted neuronal differentiation, suggesting an essential role of mecp2 in directing neural precursors into differentiated neurons. Mechanistically, her2 (the zebrafish ortholog of mammalian Hes5) was upregulated in mecp2 morphants in an Id1-dependent manner. Moreover, knockdown of either her2 or id1 fully rescued neuronal differentiation in mecp2 morphants. These results suggest that Mecp2 plays an important role in neural cell development by suppressing the Id1-Her2 axis, and provide new evidence that embryonic neural defects contribute to the later motor and cognitive dysfunctions in RTT.
Volume 128(12)
Pages 2340-50
Published 2015-6-15
DOI 10.1242/jcs.167874
PII jcs.167874
PMID 25948585
MeSH Animals Animals, Genetically Modified / embryology Animals, Genetically Modified / genetics Animals, Genetically Modified / metabolism Base Sequence Blotting, Western Brain / cytology Brain / metabolism Cell Differentiation* Cells, Cultured Chromatin Immunoprecipitation Embryo, Nonmammalian / cytology* Embryo, Nonmammalian / metabolism Genes, erbB-2* Immunoenzyme Techniques Immunoprecipitation Inhibitor of Differentiation Protein 1 / antagonists & inhibitors* Inhibitor of Differentiation Protein 1 / genetics Inhibitor of Differentiation Protein 1 / metabolism Methyl-CpG-Binding Protein 2 / genetics Methyl-CpG-Binding Protein 2 / metabolism* Mice Molecular Sequence Data Neurogenesis / physiology Neurons / cytology* Neurons / metabolism RNA, Messenger / genetics Real-Time Polymerase Chain Reaction Reverse Transcriptase Polymerase Chain Reaction Sequence Homology, Nucleic Acid Zebrafish / embryology Zebrafish / genetics Zebrafish / metabolism* Zebrafish Proteins / genetics Zebrafish Proteins / metabolism
IF 4.517
Times Cited 23
Zebrafish Tg(isl1:GFP)/rw0