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        Mechanism of the anti-liver fibrosis effect of Periplaneta americana extracts that promote apoptosis of HSC-T6 cells through the Bcl-2/Bax signaling pathway

        Yuan Liping,Yang Xiao,He Ying,Zhao Yanwen,Chen Yi,Yang Yongshou,Xiao Peiyun 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.2

        Periplaneta americana L. (Blattidae) extract (PA-B) possesses anti-oxidant, anti-inflammatory, and hep atoprotective properties; however, its mechanism of action in liver fibrosis remains unclear. Herein, we inves tigated the hepatoprotective effect and mechanism of action of PA-B. HSC-T6 cells treated with PA-B were stimulated with TGF-β1, and immunofluorescence, western blotting, Hoechst 33,342 staining, confocal laser scanning microscopy, and flow cytometry were performed. Furthermore, the effects of PA-B were verified in a rat model of hepatic fibrosis established using 40 % carbon tetrachloride (CCl 4 ). PA-B induced apoptosis of HSC-T6 cells by inhibiting proliferation (maximum inhibition ratio 99.08 %), reducing mitochondrial membrane po tential, and ameliorating apoptosis-related proteins (P < 0.01). PA-B (120 mg/kg) significantly alleviated CCl 4 -induced hepatic histopathological fibrosis and reduced the levels of aspartate aminotransferase (from 27.68 to 20.58 U/L) and alanine aminotransferase (from 16.88 to 5.93 U/L; P < 0.05 or P < 0.01). Immunohistochemistry and western blotting showed that α-SMA levels were reduced (from 0.49 to 0.23) and that the Bcl/Bax signaling pathway was significantly inhibited by PA-B (120 mg/kg; P < 0.05 or P < 0.01). PA-B exhibits anti-fibrotic effects by mediating the Bcl-2/Bax pathway and promoting HSC-T6 cell apoptosis, providing a basis for its development as a drug to treat liver fibrosis.

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