Objective:A model of inflammatory damage was induced by radiation to investigate whether ferulic acid(FA)can reduce the inflammatory response through the Sirt1-NLRP3 inflammatory pathway.This will help discover radiation-protective drugs and elucidate the molecular mechanisms related to radiation-induced inflammatory damage.Methods:A mouse model of radiation-induced immunoinflammatory injury was established to verify the anti-inflammatory effects of FA in vivo.C57BL/6J mice were randomly divided into six groups,and 5 Gy whole-body irradiation was used for modeling.Mice were administered a gastric solvent,amifostine,or 25,50,or 100 mg/kg FA daily for 12 days,consecutively,before irradiation.The serum of mice was collected 24 hour after irradiation to observe the content of inflammatory factors interleukin(IL)-1β,IL-18,IL-6,and tumor necrosis factor(TNF)-α.The spleen and thymus tissues of mice were weighed and the organ index was calculated for pathological testing and immunofluorescence detection.Results:FA reduced the radiation-induced decrease in the spleen and thymus indices.FA significantly reduced the secretion of inflammatory factors in the serum and reversed the radiation-induced reduction in lymphocytes in the spleen and thymus of mice.FA activated Sirt1 and inhibited the expression of the NLRP3 inflammasome to alleviate the inflammatory response.Conclusions:FA reduced radiation-induced inflammation in animals,possibly by activating Sirt1 and reducing nucleotide oligomerization domain(NOD)-like receptor thermal protein domain associated protein 3(NLRP3)inflammasome expression,thereby reducing the secretion of inflammatory factors.
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