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Updated: Feb 28, 2026
Measuring the Rate of Lipolysis in Ex Vivo Murine Adipose Tissue and Primary Preadipocytes Differentiated In Vitro
Published on: March 17, 2023
MiR-338-3p inhibits TNF-α-induced lipogenesis in human sebocytes
Jia Liu1, Linggai Cao1, Yue Feng1
1College of Life Science, Northeast Forestry University, Harbin, China.
Objective:
To suppress TNF-α-induced lipogenesis in sebocytes (associated with acne development) with microRNA-338-3p (miR-338-3p) and to explore the underlying mechanisms.
Results:
TNF-α increased lipid droplet formation in sebocytes which were used as in vitro model of inflammation-induced acne. Flow cytometry and TLC assays validated that miR-338-3p could suppress TNF-α-induced lipid droplet formation, down-regulate the expression of PREX2a, and inactivate AKT signaling in sebocytes. In addition, suppression of AKT activity by the PI3 K and AKT inhibitors diminished TNF-α-induced lipogenesis. PREX2a siRNA mimics the effects of miR-338-3p on AKT phosphorylation and lipogenesis. PREX2a overexpression consistently restored lipogenesis and AKT phosphorylation attenuated by miR-338-3p.
Conclusions:
MiR-338-3p suppresses the TNF-α-induced lipogenesis in sebocytes by targeting PREX2a and down-regulating PI3K/AKT signaling.
