TY - JOUR AB - Sepsis is a condition that is associated with high rates of mortality. It is characterized by serious systemic inflammatory responses induced by pathogenic invasion. Although microRNA‑150 (miR‑150) has been previously reported to be involved in the modulation of sepsis, the underlying molecular mechanism in sepsis remains poorly understood. In the present study, the human monocytic cell line THP‑1 was treated with LPS to mimic sepsis in vitro, following which miR‑150 and STAT1 expression were measured using reverse transcription‑quantitative PCR or western blotting. Secretion of inflammatory cytokines interleukin (IL)‑1β, IL‑6 and tumor necrosis factor‑α (TNF‑α) into the medium were measured by ELISA. The potential relationship between STAT1 and miR‑150 was determined using dual‑luciferase reporter and RNA immunoprecipitation assays. miR‑150 expression was found to be was downregulated by LPS treatment in THP‑1 cells in both dose‑ and time‑dependent manners. LPS treatment also induced IL‑1β, IL‑6 and TNF‑α secretion in a manner that could be inhibited by miR‑150 overexpression and enhanced by transfection with the miR‑150 inhibitor. miR‑150 was revealed to directly target STAT1 by negatively regulating its expression. In addition, STAT1 expression was demonstrated to be upregulated by LPS treatment. STAT1 overexpression reversed the inhibitory effects of miR‑150 overexpression on IL‑1β, IL‑6 and TNF‑α secretion whilst STAT1 knockdown attenuated IL‑1β, IL‑6 and TNF‑α secretion induced by miR‑150 inhibitor transfection. In conclusion, the present study suggested that miR‑150 regulates the inflammatory response in macrophages following LPS challenge by regulating the expression of STAT1. AD - Department of Emergency and Critical Care Medicine, The People's Hospital of Pudong New Area, Shanghai University of Health and Science, Shanghai 201200, P.R. China AU - Chen,Song AU - Zhu,Haijun AU - Sun,Jie AU - Zhu,Lili AU - Qin,Long AU - Wan,Jian DA - 2021/10/01 DO - 10.3892/etm.2021.10483 IS - 4 JO - Exp Ther Med KW - sepsis lipopolysaccharide microRNA‑150 STAT1 PY - 2021 SN - 1792-0981 1792-1015 SP - 1049 ST - Anti‑inflammatory effects of miR‑150 are associated with the downregulation of STAT1 in macrophages following lipopolysaccharide treatment T2 - Experimental and Therapeutic Medicine TI - Anti‑inflammatory effects of miR‑150 are associated with the downregulation of STAT1 in macrophages following lipopolysaccharide treatment UR - https://doi.org/10.3892/etm.2021.10483 VL - 22 ER -