ArticleInternational journal of molecular sciences2026
Let-7a-5p/SHIP-1 Axis Drives SARS-CoV-2 Spike-1-Induced Microglial Pyroptosis.
Article in International journal of molecular sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Although persistent neurological sequelae in long COVID are reportedly well associated with neuroinflammation, the underlying regulatory mechanisms remain poorly characterized. Previously, we identified dysregulated microRNA expression, including let-7a-5p, in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike S1-stimulated human microglial cells by RNA sequencing; however, how let-7a-5p regulates the S1-mediated neuroinflammatory processes remains undetermined. In the present study, we examined the functional role of let-7a-5p in alleviating S1-induced microglial inflammation in the CHME3 cell line as well as in human monocyte-derived microglia (MDMi) using a loss- and gain-of-function approach. Functional inhibition of let-7a-5p resulted in mitigating S1-induced inflammatory cytokine release and markers of pyroptosis. Mechanistically, we established SHIP-1 as a direct target of let-7a-5p using luciferase reporter assay validation. Interestingly, we noted upregulated expression of the
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