波形蛋白的警报素功能鉴定  

Functional verification of vimentin as an alarmin

作　　者：陈卓[1] 夏昶[1] 余兰[1] 艾思[1] 方成[1] 

机构地区：[1]武汉轻工大学医学院移植免疫实验室,武汉430023

出　　处：《中国免疫学杂志》2016年第6期798-802,共5页Chinese Journal of Immunology

基　　金：湖北省自然科学基金项目(2015CFC845);国家自然科学基金项目(31370867);武汉轻工大学研究生创新基金项目(2013CX021)资助

摘　　要：目的:鉴定胞外可溶性波形蛋白(Vim)促进相关细胞增殖、活化、趋化的能力。方法:体外检测Vim刺激大鼠脾细胞的增殖情况。体内检测Vim免疫小鼠的外周血淋巴细胞数及Vim抗体水平。收集小鼠腹腔巨噬细胞与不同浓度Vim共培养,检测其对巨噬细胞吞噬鸡红细胞能力的影响。以Transwell小室法检测Vim对NIH3T3成纤维细胞的趋化作用。结果:体外实验Vim剂量依赖性地促进大鼠脾细胞增殖,16μg/ml浓度的Vim刺激预致敏或未致敏脾细胞增殖率分别高达(196.0±9.7)%、(208.9±4.6)%,且该二者无显著性差异。体内实验单用Vim免疫小鼠的外周血淋巴细胞浓度(10~9L^(-1))激增(5.74±0.51 vs.1.69±0.13),同时激发了Vim特异性抗体水平(OD值2.31±0.06 vs.0.19±0.08);且与Vim辅以佐剂免疫小鼠的相应指标均无显著性差异。体外实验Vim浓度依赖性地促进巨噬细胞吞噬鸡红细胞的能力,并能够对NIH3T3成纤维细胞产生趋化作用。结论:胞外可溶性Vim非特异性促进炎症反应相关细胞增殖、活化、趋化,具有警报素功能。Objective：To identify the function of extracellular soluble vimentin that promotes proliferation, activation and chemotaxis of inflammatory cells. Methods： The proliferation of rat splenocytes stimulated with vimentin was evaluated in vitro. The lymphocyte counts and vimentin-antibody levels of peripheral blood in mice immunized with vimentin were detected in vivo. Peritoneal macrophages were collected and cultured with different concentrations of vimentin to detect the effect on phagocytosing chicken red blood cells. The chemotaxis of NIH3T3 fibroblast towards vimentin was observed in transwell chamber. Results：In vitro vimentin dose dependently promoted the proliferation of splenocytes. The proliferation indexes of primed and naive splenocytes cultured with 16μg/ml vimentin were reached up to （ 196. 0 ± 9. 7 ）% and （ 208. 9 ± 4. 6 ）% respectively without significant difference. In vivo vimentin significantly enhanced the lymphocytes number（109 L-1）of peripheral blood（5. 74±0. 51 vs. 1. 69±0. 13）and the levels of vimentin specific antibody（ OD value 2. 31 ± 0. 06 vs. 0. 19 ± 0. 08 ） that shown no significant difference from immunization with vimentin plus CFA. In vitro vimentin dose dependently stimulated phagocytic ability of macrophages and performed the chemotactic effects on NIH3T3 fibroblasts. Conclusion：Extracellular soluble vimentin promotes the proliferation,activation and chemotaxis of concerned inflammatory cells and possesses the functions as an alarmin.

关 键 词：波形蛋白 增殖 活化 趋化 警报素 

分 类 号：R392.12[医药卫生—免疫学]