摘要
目的 :探讨川芎嗪 (LTZ)对正常人外周血淋巴细胞 (PBL)蛋白激酶C(PKC)通道在受到与哮喘有关的炎症介质刺激时所发生的功能变化是否有影响。方法 :取 6 3例健康人外周静脉血各 10mL ,分离PBL ,分 4批分别给予以下处理后 ,采用 [γ - 32 P]-ATP催化活性测定法检测细胞胞膜、胞浆及总PKC活性。( 1)分 3组即 5g/LLTZ处理组 ( 6例 )、5 μmol/LPKC阻断剂Ro31- 82 2 0处理组 ( 6例 )和对照组 ( 6例 ,以下各批均以此组为阴性对照组 ) ;( 2 )共 3组分别用 10 0nmol/L乙酰甲胆碱 (Mch ,5例 )、5g/LLTZ +10 0nmol/LMch( 5例 )或 5 μmol/LRo31- 82 2 0 +10 0nmol/LMch( 5例 )处理。 ( 3)共 3组分别采用 10 0nmol/L组胺、5g/LLTZ +10 0nmol/L组胺 ( 5例 )或 5 μmol/LRo31-82 2 0 +10 0nmol/L组胺 ( 5例 )处理。 ( 4)共 3组分别用 10 0nmol/LPMA( 5例 )、5g/LLTZ +10 0nmol/LPMA( 5例 )或 5μmol/LRo31- 82 2 0 +10 0nmol/LPMA( 5例 )。结果 ( 1)LTZ对正常人PBL胞膜、胞浆及总PKC活性均无明显影响 ;( 2 )乙酰甲胆碱及组胺均可促进正常人PBL胞膜PKC活性增加 ,LTZ对该作用有抑制效应 (P <0 0 5 )。 ( 3)LTZ对PMA诱发正常人PBL胞膜PKC活性增加的效应有抑制作用 (P <0 0 5 )。结论
AIM: To investigate whether Ligustrazine(LTZ) has an effect on the changes of protein kinase C(PKC) signaling pathway induced by inflammatory mediators involved in asthma in normal human peripheral blood lymphocytes (PBL). METHODS: 10 mL peripheral venous blood was obtained from each of 63 health humans and treated as follows. The activities of PKC from cytosolic and membrane fractions in PBL were measured by -ATP-catalyzing assay, after PBL had been isolated and performed by following processes: (1) First: three groups treated with 5 g/L LTZ(n=6) or 5 μmol/L Ro31-8220 (n=6); Paired untreated PBL served as control of this group, as well as the negative controls of the following groups(n=6); (2)Second : three groups treated with 100 nmol/L Methacholine (Mch, n=5), 5 g/L LTZ+100 nmol/L Mch(n=5)or 5 μmol/L Ro31-8220(a PKC inhibitor)+100 nmol/L Mch(n=5); (3)Third: three groups treated with 100 nmol/L histamine, 5 g/L LTZ+100 nmol/L histamine(n=5) or 5 μmol/L Ro31-8220+100 nmol/L histamine(n=5); (4)Fourth: three groups treated respectively with 100 nmol/L PMA(a PKC activator, n=5), 5 g/L LTZ+100 nmol/L PMA(n=5) or 5 μmol/L Ro31-8220+100 nmol/L PMA(n=5). RESULTS: (1)LTZ had no effect on the activities of PKC in inactive PBL in normal humans; (2) Methacholine or histamine resulted in an increase in membrane PKC activity of normal human PBL, which was partly suppressed by LTZ (all P<0.05); (3) PMA caused an increase in membrane PKC activity of normal human PBL, which was partly decreased by LTZ (all P<0.05). CONCLUSION: LTZ has an inhibitory effect on activation of PKC signaling pathway in PBL in normal humans induced by some inflammatory mediators involved in asthma, which may be one of the mechanisms that LTZ plays a role in the prevention and therapy of asthma.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2003年第4期507-510,共4页
Chinese Journal of Pathophysiology
基金
教育部"高等院校骨干教师资助计划"2 0 0 0年度资助项目
