抑制ABCC1/MRP1转运体下调IL-1β分泌的实验研究

Study on Down-regulation of Interleukin-1βSecretion by Inhibiting ABCC1/MRP1 Transporter

目的:用体外巨噬细胞实验和全基因敲除小鼠,筛选IL-1β分泌相关的胞膜转运体。方法:分化THP-1细胞株得到人源性巨噬细胞,从人外周血获取巨噬细胞。获取同性别、同年龄的FVB野生型小鼠作为MRP1全基因敲除小鼠的对照,培养小鼠腹腔和骨髓巨噬细胞。使用ABCC1/MRP1、ABCG2/BCRP、ABCB1/P-gp、OATP1B1和MATE转运体抑制剂处理细胞,再使用脂多糖和腺苷三磷酸刺激细胞,采用ELISA、Western blot和细胞免疫荧光法检测IL-1β分泌水平。结果:人和小鼠巨噬细胞抑制剂实验表明,抑制ABCC1/MRP1转运体后,IL-1β分泌显著降低,而抑制其他4类转运体无效果。在动物实验中,MRP1全基因敲除小鼠的骨髓巨噬细胞分泌IL-1β的水平显著低于对照组。结论:ABCC1/MRP1转运体是一种新发现的IL-1β分泌途径,有望成为解决细胞因子释放综合征等临床问题的新靶标。

Objective:To screen interleukin(IL)-1βsecretion-related membrane transporters by macrophage experiment in vitro and conventional knockout mice.Methods:THP-1 cell line was differentiated to obtain human THP-1-derived macrophages,and the primary macrophages were obtained from human peripheral blood.FVB wild-type mice with the same sex and age were used as the controls of MRP1 knockout mice.The macrophages in abdominal cavity and bone marrow of mice were cultivated.The cells were treated with ABCC1/MRP1,ABCG2/BCRP,ABCB1/P-gp,OATP1B1,and MATE transporter inhibitors,then stimulated by lipopolysaccharide and adenosine triphosphate.The secretion level of IL-1βwas detected by ELISA,Western blot,and immunofluorescence.Results:After inhibiting ABCC1/MRP1 transporter,the secretion of IL-1βdecreased significantly,while inhibition of the other 4 transporters had no effect.In animal experiment,the level of IL-1βsecreted by macrophages in bone marrow of MRP1 knockout mice was significantly lower than control group(P<0.05).Conclusion:ABCC1/MRP1 transporter is a newly discovered IL-1βsecretion pathway,which is expected to become a new target for solving clinical problems such as cytokine release syndrome.