摘要
目的 :探讨T淋巴细胞活化、增殖、诱导肝癌细胞凋亡过程中第二信使系统的调控机制。方法 :用CD2 8+B7 1(CD80 )单克隆抗体共刺激T淋巴细胞诱导肝癌细胞 (BLE 740 2 )凋亡 ,测定不同诱导时间T细胞内cAMP、cGMP和Ca2 + 的浓度改变及肝癌细胞凋亡情况。结果 :活化的T淋巴细胞中 ,cAMP浓度在初期短暂升高 ,继而快速下降 ,作用于肝癌细胞后逐步回升至 1～ 2倍 ,而细胞内cGMP的浓度急剧升高 6～ 7倍 ,Ca2 + 浓度也显著增加 2～ 3倍 ,且均在第 4天达最高值 ,与癌细胞的凋亡呈正相关。结论 :T淋巴细胞内第二信使系统cAMP、cGMP和Ca2 + 的水平与细胞的活化增殖、杀伤效应密切相关。
Objective:To explore the action of the second signal system in the activatied and proliferating T cells and the induction of apoptosis of the hepatoma cells.Methods:The T cells were costimulated by anti CD28 and anti CD80(B7.1)McAb and acted on the hepatoma cells(BEL 7402),then testing the concentration of cAMP?cGMP and Ca 2+ in the T cells and the apoptosis of the hepatoma cells.Results:The concentration of cAMP was increased temporarily at first,then decreased rapidly,and increased 1 2 times again when acted on the hepatoma cells.The concentration of cGMP was increased 6 8 times fast and the concentration of Ca 2+ obviously increased 2 3 times too.The peak of them was at the fourth day and positive related to apoptosis of the hepatoma cells.Conclusion:The level of the second signal system of cAMP?cGMP and Ca 2+ were significant correlated with the T cells activated and porliferating and the cytotoxic effect.
出处
《中国免疫学杂志》
CAS
CSCD
北大核心
2001年第10期541-543,共3页
Chinese Journal of Immunology
基金
国家自然科学基金 (3 9770 698)
广东省自然科学基金 (3 80 83 8)资助项目
