Basic Investigation| Volume 364, ISSUE 1, P66-75, July 2022

Silencing of long non-coding RNA ZFAS1 alleviates LPS-induced acute lung injury by mediating the miR-96-5p/OXSR1 axis in sepsis



      Extensive studies have revealed that long non-coding RNAs (lncRNAs) are associated with sepsis-induced acute lung injury (ALI). This study focused on the function and potential mechanisms of lncRNA zinc finger antisense 1 (ZFAS1) in a cell model of sepsis-induced ALI.


      To induce sepsis-induced ALI in vitro and in vivo, mice were subjected to cecal ligation and puncture (CLP) operation, and human small airway epithelial cells (HSAECs) were stimulated with lipopolysaccharide (LPS) (10 μg/mL). Relative expression of oxidative stress-responsive 1 (OXSR1), lncRNA ZFAS1, and microRNA (miR)-96-5p was detected by quantitative real-time polymerase chain reaction (qRT-PCR). Relative protein expression of Bax, Bcl-2, and OXSR1 was determined by western blotting. Moreover, enzyme-linked immunosorbent assay was used to measure the levels of IL-6, IL-1β, and TNF-α. A dual-luciferase reporter assay was conducted to test the targeting interplay between ZFAS1/OXSR1 and miR-96-5p.


      Up-regulation of lncRNA ZFAS1 and OXSR1 and down-regulation of miR-96-5p was observed in lung tissues of CLP-induced mice and LPS-treated HSAECs. Decreased ZFAS1 expression or increased miR-96-5p expression repressed inflammation and apoptosis and promoted cell viability in LPS-treated HSAECs. The lncRNA ZFAS1 competitively binds to miR-96-5p and inversely modulates miR-96-5p expression. MiR-96-5p directly targets OXSR1 and inversely regulates OXSR1 expression. In addition, the protective effects of ZFAS1 knockdown on LPS-induced HSAECs were reversed by miR-96-5p inhibition or OXSR1 overexpression.


      Down-regulation of lncRNA ZFAS1 attenuated LPS-induced ALI in HSAECs by regulating the miR-96-5p/OXSR1 axis.

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