Age-related Huntington's disease progression modeled in directly reprogrammed patient-derived striatal neurons highlights impaired autophagy.

Age-related Huntington's disease progression modeled in directly reprogrammed patient-derived striatal neurons highlights impaired autophagy.
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DOI:
10.1038/s41593-022-01185-4
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发表时间:
2022-11
影响因子:
25
通讯作者:
Yoo, Andrew S.
Yoo, Andrew S.
中科院分区:
医学1区
文献类型:
--
作者:
Oh, Young Mi;Lee, Seong Won;Kim, Woo Kyung;Chen, Shawei;Church, Victoria A.;Cates, Kitra;Li, Tiandao;Zhang, Bo;Dolle, Roland E.;Dahiya, Sonika;Pak, Stephen C.;Silverman, Gary A.;Perlmutter, David H.;Yoo, Andrew S.

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Huntington’s disease (HD) is an inherited neurodegenerative disorder with adult-onset clinical symptoms, but the mechanism by which aging drives the onset of neurodegeneration in HD patients remains unclear. Here, we examined striatal medium spiny neurons (MSNs) directly reprogrammed from fibroblasts of HD patients to model the age-dependent onset of pathology. We found that pronounced neuronal death occurred selectively in reprogrammed MSNs from symptomatic HD patients (HD-MSNs) compared to MSNs derived from younger, pre-symptomatic patients (pre-HD-MSNs) and control MSNs from age-matched healthy individuals. We observed age-associated alterations in chromatin accessibility between HD-MSNs and pre-HD-MSNs, and identified miR-29b-3p, whose age-associated upregulation promotes HD-MSN degeneration by impairing autophagic function through human-specific targeting of STAT3 3’UTR. Reducing miR-29b-3p or chemically promoting autophagy increased the resilience of HD-MSNs against neurodegeneration. Our results demonstrate miRNA upregulation with aging in HD as a detrimental process driving MSN degeneration, and potential approaches for enhancing autophagy and resilience of HD-MSNs.
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