摘要
为探讨蛋白激酶在青石棉诱导的肺成纤维细胞增殖中的作用 ,本研究采用体外细胞培养技术 ,用兔肺泡巨噬细胞 (AM)和人胚肺成纤维细胞 (HEPF)组成体外模型 ,用 MTT法测定 HEPF的增殖活力 ,检测了蛋白激酶 (PKA、PKC和 TPK)的抑制剂和激活剂对青石棉诱导的 HEPF增殖的影响 ,以二氧化钛为阴性对照 ,标准石英为阳性对照。结果发现 ,PKA、PKC和 TPK的抑制剂和激活剂均能使青石棉诱导的 HEPF增殖受到抑制和激活 ,并随剂量的变化而变化 ,呈显著的剂量 -效应关系 (P<0 .0 1) ,且青石棉组被抑制和激活的程度强于各对照组。从 3种蛋白激酶的作用强度分析 ,发现 TPK信号通路在青石棉诱导的 HEPF增殖中的作用最强 ,其次是 PKC信号通路 ,PKA信号通路的作用最弱。提示 PKA、PKC和 TPK信号通路均参与了青石棉处理 AM上清液致 HEPF增殖过程 ,TPK信号通路可能起着主导作用 ,这为寻找石棉致纤维化因子的研究方向提供了参考。
In order to study the role of protein kinase in the proliferation of lung fibroblasts induced by crocidolite. An in vitro model was established by rabbit alveolar macrophage (AM) and human embryonic pulmonary fibroblasts (HEPF). Using MTT color response method to measure HEPF proliferation, the influence of the inhibitor or activator of protein kinase (PKA, PKC and TPK) on the proliferation of crocidolite induced HEPF were investigated. TiO 2 was taken as negative control and SiO 2 positive control. The results showed that the inhibitors of PKA, PKC and TPK could all inhibit the proliferation of HEPF induced by crocidolite, their activators could also promote the proliferation of HEPF. There all existed significant dose effect relationships ( P <0.01), and the intensity in crocidolite group was inhibited or activated more than that in the controls. Through acting intensity analysis, the intensity was found as follows: TPK>PKC>PKA. It was suggested that TPK, PKC and PKA signal pathways were all involved in the process of the proliferation of crocidolite induced HEPF, but TPK maybe played a key role in this process. This study provide leads for further research on identifying the bioactive factors of proliferation of crocidolite induce HEPF.
出处
《卫生研究》
CAS
CSCD
北大核心
2001年第1期10-13,共4页
Journal of Hygiene Research
基金
卫生部科学研究基金资助(No.98-1-229)
