特异性类胰蛋白酶抑制剂双苯甲脒对肥大细胞分泌的调控作用

被引:19
作者
谢华
何韶衡
机构
[1] 汕头大学医学院变态反应学和炎症学研究所
[2] 汕头大学医学院变态反应学和炎症学研究所 广东 汕头
[3] 广东 汕头
关键词
类胰蛋白酶; 双苯甲脒; 肥大细胞; 扁桃体;
D O I
10.13423/j.cnki.cjcmi.003052
中图分类号
R392 [医学免疫学];
学科分类号
100102 ;
摘要
目的:研究新型的特异性类胰蛋白酶抑制剂双苯甲脒,对肥大细胞稳定性的影响。方法:扁桃体组织经酶消化后,将细胞成分用全HEPES缓冲盐溶液(HBSS)重新悬浮。肥大细胞 激发和抑制剂作用的试验在试管中37℃条件下完成。类胰蛋白酶水平用ELISA法测定。结果:同时加入扁桃体细胞悬液中的双苯甲脒,可以剂量依赖的方式抑制抗IgE诱导的类胰蛋白酶释放。仅1 mg/L(1.54μmol/L)的双苯甲脒,即可抑制肥大细胞释放类胰蛋白酶达52%,10 mg/L则能抑制76%的释放。将预培养时间延长30 min,对双苯甲脒的抑制作用无明显影响。在培养到45 min时,双苯甲脒可抑制高达47%的基础类胰蛋白酶释放。与细胞培养15 min后,抗IgE抗体(1g/L)或钙离子导入剂(CI,1 μmol/L)引起的类胰蛋白酶释放的量,分别为基础分泌量的3.2和2.6倍。但是,当细胞与全HBSS预培养超过10 min后,肥大细胞对抗IgE抗体或CI的反应性明显降低。结论:双苯甲脒能够抑制人类扁桃体肥大细胞的IgE依赖性类胰蛋白酶释放。因此,有望开发成为一种新型的肥大细胞稳定剂。
引用
收藏
页码:100 / 102
页数:3
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