LncRNA SNHG1 Alleviated Apoptosis and Inflammation During Ischemic Stroke by Targeting MiR-376a and Modulating CBS/HS Pathway

Background: Ischemic stroke (IS) is a major public health issue causing mortality and disability and is more difficult to treat than other cerebral diseases. Previous study reported that miR-376a was upregulated in the serum of stroke patients, indicating that miR-376a played potential role in occurrence and development of stroke.

Methods: IS cell model was induced by oxygen-glucose deprivation (OGD) exposed HCMEC/D3 cells. The mRNA level of SNHG1, miR-376a and inflammatory cytokines were detected by q-PCR. Protein level of CBS, apoptotic proteins were examined by Western blot. Apoptosis was analyzed by flow cytometry, and HS level was measured by kit. Interaction among lncRNA, miRNA and target gene was validated by luciferase assay.

Results: Our research revealed that mRNA level of SNHG1 and CBS in HCMEC/D3 cells was downregulated while miR-376a was upregulated under OGD conditions. Further results demonstrated that miR-376a overexpression promoted apoptosis and inflammation while SNHG1 overexpressing alleviated such processes. Mechanistically, SNHG1 directly targeted miR-376a, and CBS was a target of miR-376a. Moreover, SNHG1 exert its function inhibiting miR-376a to regulate CBS expression.

Conclusion: LncRNA SNHG1 depressed apoptosis and inflammation of IS cell model inhibiting miR-376a and upregulating CBS/HS signal. These results show light on underlying mechanisms of IS and provide potential targets for IS therapy.