期刊
DEVELOPMENT
卷 140, 期 23, 页码 4751-4762出版社
COMPANY BIOLOGISTS LTD
DOI: 10.1242/dev.101378
关键词
Growth differentiation factor 5; Bone morphogenetic protein; Dendrite; Hippocampus; Mouse
资金
- Wellcome Trust [085984]
- Proyecto de Excelencia of Regional Government Andalussia [P10-CVI-6740]
- Fundacao para a Ciencia e a Tecnologia [SFRH/BD/60498/2009]
- National Institutes of Health [CD08/00078]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/60498/2009] Funding Source: FCT
Dendrite size and morphology are key determinants of the functional properties of neurons. Here, we show that growth differentiation factor 5 (GDF5), a member of the bone morphogenetic protein (BMP) subclass of the transforming growth factor beta superfamily with a well-characterised role in limb morphogenesis, is a key regulator of the growth and elaboration of pyramidal cell dendrites in the developing hippocampus. Pyramidal cells co-express GDF5 and its preferred receptors, BMP receptor 1B and BMP receptor 2, during development. In culture, GDF5 substantially increased dendrite, but not axon, elongation from these neurons by a mechanism that depends on activation of SMADs 1/5/8 and upregulation of the transcription factor HES5. In vivo, the apical and basal dendritic arbours of pyramidal cells throughout the hippocampus were markedly stunted in both homozygous and heterozygous Gdf5 null mutants, indicating that dendrite size and complexity are exquisitely sensitive to the level of endogenous GDF5 synthesis.
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