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Ca2+/CaN-NFATc信号通路在哮喘大鼠淋巴细胞增殖和活化中的作用 被引量:1
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作者 张彩苹 杜永成 许建英 《中国医师杂志》 CAS 2012年第7期910-913,916,共5页
目的探讨Ca2+/CaN-NFATc信号通路在哮喘大鼠淋巴细胞活化、增殖中的作用。方法哮喘组和CsA(cyclospoin A,CaN的抑制物,环孢菌素A)干预组大鼠以卵蛋白溶液致敏及激发,对照组以生理盐水致敏及激发,无菌分离脾淋巴细胞,加PHA—P... 目的探讨Ca2+/CaN-NFATc信号通路在哮喘大鼠淋巴细胞活化、增殖中的作用。方法哮喘组和CsA(cyclospoin A,CaN的抑制物,环孢菌素A)干预组大鼠以卵蛋白溶液致敏及激发,对照组以生理盐水致敏及激发,无菌分离脾淋巴细胞,加PHA—P(终浓度为5μg/ml)培养24h,CsA干预组同时加入CsA稀释液(终浓度为1.0μg/ml)。检测淋巴细胞内[Ca2+]i浓度、CaN活性、去磷酸化NFATc蛋白和CyclinE蛋白的表达、细胞周期各时相分布及上清液中IL-4和IL-2的水平。结果与对照组相比,哮喘组淋巴细胞Ca2+/CaN-NFATc的活性[(81.21±14.39)V8(63.66±9.02)]增加(P〈0.05);CyclinE蛋白的表达量[(0.9327±0.0370)VS(0.8374±0.0637)]增加(P〈0.01),处于G0/G1期的淋巴细胞比例[(89.3300±3.3850)VS(94.1260±1.4389)]减少,s期[(7.8600±2.8241)VS(4.0270±1.8650)]及S+G2/M期比例[(10.6700±3.3850)V8(5.8740±1.4389)]增加(P均〈0.01));上清液中IL4水平[(1.55±0.19)pg/ml vs(0.99±0.12)pg/m1]及IL-4/IL-2比值[(0.81±0.12)vs(0.49±0.49)]增加(P均〈0.01)。CsA可使哮喘大鼠淋巴细胞Ca2+/CaN—NFATc的活性(47.19±7.16)下降(P〈0.05);CyclinE蛋白的表达量(0.6840±0.0485)减少(P〈0.01),使处于S期(4.8600±1.9595)和S+G2/M期(7.9900±1.9405)的淋巴细胞比例减少,G0/G1期比例(92.2100±1.9267)增加(P均〈0.01),细胞增殖受到抑制;使上清液中IL-4(0.47±0.09)pg/ml水平减少(P〈0.01),IL-4/IL-2比值下降(0.78±0.20);淋巴细胞Ca2+/CaN-NFATc的活性与IL4的水平及CyclinE蛋白的表达量均呈正相关(r=0.711,P〈0.01和r=0.749,P〈0.01)。结论哮喘大鼠淋巴细胞Ca2+/CaN-NFATc的活性增加;其活性的增加可通过促进IL4的产生和分泌,导致Th1/Th2的失衡,也可通过促进Cyclin E蛋白的表达而引起淋巴细胞的增殖。 展开更多
关键词 钙/钙调神经磷酸酶-活化T细胞核因子/代谢 哮喘/病理生理学/免疫学 淋巴细 胞/细胞学/代谢 细胞增殖 大鼠
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The effect of lipid metabolism on biological characteristics of hepatic stellate cell 被引量:1
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作者 JING Xinyan YANG Xuefeng 《Journal of Medical Colleges of PLA(China)》 CAS 2013年第5期281-288,共8页
Hepatic stellate cells(HSCs) are a kind of fat-storing cells, the lipid droplets are rich in the Cytoplasm, in which retinyl ester accounts for 42%, triglyceride occupies 28%, cholesterol (total) occupies 13%, pho... Hepatic stellate cells(HSCs) are a kind of fat-storing cells, the lipid droplets are rich in the Cytoplasm, in which retinyl ester accounts for 42%, triglyceride occupies 28%, cholesterol (total) occupies 13%, phospholipids occupies 4% respectively. Studies have continued that thetransforms of HSC phenotype follows the changing of the cell lipid. After the activation of HSC, with HSC phenotype changing from fat-storing cells into myofibroblast, the lipid droplets decreased or disappeared gradually, which means HSCs are under the differentiating process of removing adipose, meawhile triglyceride, and the main content of lipid droplets, also obviously reduced. It was ever declined that during the process of HSC re-fating, the activated HSC would turn into quiescent state. Therefore this shows HSCs fat metabolism is closely related to the biological activity. 展开更多
关键词 Hepatic stellate cells Lipid metabolism Cell proliferation APOPTOSIS Liver fibrosis
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