[No authors listed]
mice and impaired proliferation and differentiation in ANSCs cultured in vitro, accompanied by reduced microRNA-7 (miR-7) expression levels. We further found that ANSC expressed NLRP3-containing inflammasome and α-syn activated both TLR4/NF-κB and NLRP3/caspase-1 signals in ANSCs. Either Nlrp3 knockdown or Caspase-1 knockout could attenuate the inhibition of proliferation in ANSCs induced by α-syn. Furthermore, we demonstrated that miR-7 post-transcriptionally controlled Nlrp3 expression besides targeting α-syn. Most notably, stereotactic injection of miR-7 mimics into lateral ventricles significantly inhibited NLRP3 inflammasome activation and improved adult neurogenesis in mouse SVZ. Our study provides a direct link between NLRP3 inflammasome activation and α-syn-impaired neurogenesis in the pathogenesis of α-synucleinopathies.
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