安徽医科大学学报2024，Vol.59Issue(7)：1107-1115,9.DOI:10.19405/j.cnki.issn1000-1492.2024.07.001
PGE2抑制TDO2表达和活性调控巨噬细胞功能变化的机制
The specific mechanism of PGE2 inhibiting TDO2 expression and activity regulation of macrophage function changes
摘要
Abstract
Objective To investigate the effects of tryptophan-2,3-dioxygenase(TDO2)on collagen-induced ar-thritis,the expression of CIA in mice and the specific mechanism by which prostaglandin E2(PGE2)inhibits the expression and activity of TDO2 and thus regulates the function of macrophages.Methods Type Ⅱ collagen in-duced the CIA model in DBA/1J mice.The ankle joint injury of CIA mice was detected by X-ray.The expression of TDO2 in ankle joint and spleen was detected by immunohistochemistry.Changes of TDO2 expression in perito-neal macrophages(PMs)were detected by qPCR and immunofluorescence.TDO2 expression was detected by small interference in RAW264.7 cells,TDO2 inhibitor 680C91,PGE2 stimulation with different concentrations(0.1,1,10 μmol/L)and EP4 receptor agonist CAY10598.qPCR and Western blot were used to detect TDO2 expression.The phagocytosis and polarization of macrophages were detected by flow cytometry.The activity of TDO2 was detec-ted by colorimetry.Results Compared with normal mice,CIA mice had larger soft tissue swelling in ankle,and increased TDO2 expression in synovium,spleen and PMs.In RAW264.7 cells,TDO2 expression was significantly inhibited after small interference,TDO2 inhibitor 680C91,PGE2 stimulation,and EP4 receptor agonist CAY10598,macrophage phagocytosis decreased,and M1/M2 ratio decreased(P＜0.05).Colorimetric results showed that the activity of TDO2 was inhibited after stimulation of PGE2 and EP4 agonist CAY10598 in RAW264.7 cells(P＜0.05).Conclusion The increased expression of TDO2 in macrophages may promote synovial injury in CIA mice,and PGE2 regulates the function of macrophages by inhibiting the expression and activity of TDO2 by ac-tivating EP4 receptor.关键词
类风湿关节炎/胶原诱导型关节炎/色氨酸-2,3-双加氧酶/前列腺素E2/前列腺素受体4Key words
rheumatoid arthritis/collagen-induced arthritis/tryptophan-2,3-dioxygenase/prostaglandin E2/prostaglandin receptor 4分类
医药卫生引用本文复制引用
王燚,李丝雨,王越业,董伟波,程梦,魏伟,常艳..PGE2抑制TDO2表达和活性调控巨噬细胞功能变化的机制[J].安徽医科大学学报,2024,59(7):1107-1115,9.基金项目
安徽省自然科学基金面上项目(编号:2108085MH320) （编号:2108085MH320）
安徽省留学人员创新项目择优资助计划项目(编号:200LCX019) （编号:200LCX019）
