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    Macrophage foam cell formation and inflammation are a pathological hallmark of atherosclerosis. ClC-2 has been implicated in various pathological processes, including inflammation and lipid metabolic disorder. However, the functional role of ClC-2 in macrophage foam cell formation and inflammation is unclear. Here, we found that ClC-2 was dominantly expressed in macrophages of atherosclerotic plaque and increased in atherogenesis. Knockdown of ClC-2 inhibited ox-LDL -induced lipid uptake and deposition in macrophages. The increase in CD36 expression and the decrease in ABCA1 expression induced by ox-LDL were alleviated by ClC-2 downregulation. Further, ClC-2 lacking limited the ox-LDL-induced secretion of inflammatory cytokines and chemokine, and suppressed Nlrp3 inflammasome activation. Restoration of Nlrp3 expression reversed the effect of ClC-2 downregulation on macrophage lipid accumulation and inflammation. Collectively, our study demonstrates that ClC-2 knockdown ameliorates ox-LDL-induced macrophage foam cell formation and inflammation by inhibiting Nlrp3 inflammasome activation.


    Wenyuan Ding, Jiamin Li, Lili Wang, Mingming Zhang, Fei Zheng. ClC-2 inhibition prevents macrophage foam cell formation by suppressing Nlrp3 inflammasome activation. Bioscience, biotechnology, and biochemistry. 2020 Oct;84(10):2096-2103

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    PMID: 32657644

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