期刊
NATURE NEUROSCIENCE
卷 13, 期 11, 页码 1380-U112出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/nn.2662
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资金
- Houart laboratory
- Schneider-Maunoury laboratory
- Nothias laboratory
- King's College Charitable Foundation
- FRM
- AFM
- MRC
- Association Strumpell-Lorrain (A-SL)
- Medical Research Council [G0601064, G0901899B] Funding Source: researchfish
- MRC [G0601064] Funding Source: UKRI
To better understand hereditary spastic paraplegia (HSP), we characterized the function of atlastin, a protein that is frequently involved in juvenile forms of HSP, by analyzing loss- and gain-of-function phenotypes in the developing zebrafish. We found that knockdown of the gene for atlastin (atl1) caused a severe decrease in larval mobility that was preceded by abnormal architecture of spinal motor axons and was associated with a substantial upregulation of the bone morphogenetic protein (BMP) signaling pathway. Overexpression analyses confirmed that atlastin inhibits BMP signaling. In primary cultures of zebrafish spinal neurons, Atlastin partially colocalized with type I BMP receptors in late endosomes distributed along neurites, which suggests that atlastin may regulate BMP receptor trafficking. Finally, genetic or pharmacological inhibition of BMP signaling was sufficient to rescue the loss of mobility and spinal motor axon defects of atl1 morphants, emphasizing the importance of fine-tuning the balance of BMP signaling for vertebrate motor axon architecture and stability.
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