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Inflammation underlies a variety of physiological and pathological processes and plays an essential role in shaping the ensuing adaptive immune responses and in the control of pathogens. However, its physiological functions are not completely clear. Using a LPS-treated RAW264.7 macrophage inflammation model, we found that the production of inflammatory cytokines in ISOC1-deficient cells was significantly higher than that in the control group. It was further proved that ISOC1 deficiency could activate AKT1, and the overactivation of AKT1 could reduce the stability of PEX11B through protein modification, thereby reducing the peroxisome biogenesis and thus affecting inflammation. In this study, we reported for the first time the role of ISOC1 in innate immunity and elucidated the mechanism by which ISOC1 regulates inflammation through AKT1/PEX11B/peroxisome. Our results defined a new role of ISOC1 in the regulatory mechanism underlying the LPS-induced inflammatory response.

ISOC1 Modulates Inflammatory Responses in Macrophages through the AKT1/PEX11B/Peroxisome Pathway