半胱氨酰白三烯受体对小鼠小胶质细胞吞噬功能的调节作用

目的: 研究半胱氨酰白三烯（CysLT）受体（CysLT1R和CysLT2R）对小鼠BV2小胶质细胞吞噬功能的调节作用。方法: 以经典炎症激活剂脂多糖和CysLT受体激动剂LTD4处理BV2细胞，采用免疫荧光计数法和流式细胞仪检测BV2细胞吞噬功能，免疫荧光共染法观察BV2细胞中CysLT1R和CysLT2R表达分布。结果: 脂多糖和LTD4均能增强BV2细胞吞噬功能，而CysLT1受体选择性拮抗剂孟鲁司特和CysLT2受体选择性拮抗剂HAMI 3379均能抑制脂多糖和LTD4诱导的BV2细胞吞噬功能增强；脂多糖和LTD4激活BV2细胞后可引起CysLT1R和CysLT2R在细胞内分布变化，两种亚型的受体分布变化趋势基本一致，且存在共表达。结论: CysLT1R和CysLT2R均可以调节BV2细胞的吞噬功能，且两者具有协同性。
Abstract: Objective: To determine the effects of cysteinyl leukotriene receptors (CysLT1R and CysLT2R) on phagocytosis of mouse BV2 microglial cells. Methods: BV2 cells were stimulated with microglial activators lipopolysaccharide (LPS) or CysLT receptor agonists LTD4. The phagocytosis of BV2 cells was observed by immunofluorescence analysis and flow cytometry. The intracellular distributions of CysLT1R and CysLT2R in BV2 cells were examined with immunofluorescence staining. Results: Both LPS and LTD4 could significantly enhance the phagocytosis of BV2 cells, and such effect could be inhibited by CysLT1R selective antagonist Montelukast and CysLT2R selective antagonist HAMI 3379. The activation of BV2 cells induced by LTD4 or LPS resulted in changes in intracellular distributions of CysLT1R and CysLT2R. CysLT1R and CysLT2R was co-localization with a similar distribution. Conclusion: CysLT1R and CysLT2R regulate the phagocytosis of mouse BV2 microglial cells with a synergistic effect. Key words: Cysteine/metabolism Receptors, leukotriene/metabolism Phagocytosis/drug effects Microglia/drug effects Lipopolysaccharides/pharmacology Cells, cultured