期刊
MOLECULAR PSYCHIATRY
卷 20, 期 11, 页码 1350-1365出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/mp.2014.141
关键词
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资金
- California Institute for Regenerative Medicine (CIRM) [TR2-01814]
- National Institutes of Health through the NIH Director's New Innovator Award Program [1-DP2-OD006495-01]
- A NARSAD Independent Investigator Grant
- NIH predoctoral training grant [T32 GM008666]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- NIH [NS047344, NS048271, HD069184, K08MH087639, RC2MH089956]
- NARSAD
- MSCRF
- SAFRI
An increasing number of genetic variants have been implicated in autism spectrum disorders ( ASDs), and the functional study of such variants will be critical for the elucidation of autism pathophysiology. Here, we report a de novo balanced translocation disruption of TRPC6, a cation channel, in a non- syndromic autistic individual. Using multiple models, such as dental pulp cells, induced pluripotent stem cell ( iPSC)- derived neuronal cells and mouse models, we demonstrate that TRPC6 reduction or haploinsufficiency leads to altered neuronal development, morphology and function. The observed neuronal phenotypes could then be rescued by TRPC6 complementation and by treatment with insulin- like growth factor- 1 or hyperforin, a TRPC6- specific agonist, suggesting that ASD individuals with alterations in this pathway may benefit from these drugs. We also demonstrate that methyl CpG binding protein- 2 ( MeCP2) levels affect TRPC6 expression. Mutations in MeCP2 cause Rett syndrome, revealing common pathways among ASDs. Genetic sequencing of TRPC6 in 1041 ASD individuals and 2872 controls revealed significantly more nonsynonymous mutations in the ASD population, and identified loss- of- function mutations with incomplete penetrance in two patients. Taken together, these findings suggest that TRPC6 is a novel predisposing gene for ASD that may act in a multiple- hit model. This is the first study to use iPSC- derived human neurons to model non- syndromic ASD and illustrate the potential of modeling genetically complex sporadic diseases using such cells.
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