Knockdown of lncRNA MIAT attenuated lipopolysaccharide-induced microglial cells injury by sponging miR-613.

Microglia activation and its mediated neuroinflammation play an important role in the pathological process of various central nervous system injuries and diseases. Previous studies have reported abnormal expression of lncRNAs participated in neuroinflammation. However, the expression pattern and involvements of MIAT in neuroinflammatory diseases are not fully investigated. We first screened abnormal expressed lncRNAs in BV2 cells treated with LPS. The expression of MIAT in LPS-induced BV2 cells was detected by qRT-PCR. MTT assay, cell migration, flow cytometry analysis, ELISA, qRT-PCR, and Western blotting analysis were applied to evaluating the effect of si-MIAT on LPS-induced H9C2 cells. The bioinformatics analysis and the rescue experiment were devoted to the underlying mechanism of lncRNA-miRNA-mRNA network. The results showed LncRNA MIAT expression was significantly increased in LPS-induced BV2 microglial cells. Besides, MIAT knockdown alleviated LPS-induced repression of cell viability and induction of apoptosis and inflammatory response in BV2 cells. Furthermore, LncRNA MIAT regulated NFAT5 expression via sponging miR-613 in LPS-induced BV2 cells. Altogether, these results suggest that lncRNA MIAT functioned as a ceRNA for miR-613 to modulate NFAT5 expression in LPS-induced BV2 cells, which may contribute to a better understanding of the mechanism of neuroinflammatory diseases.