摘要
目的研究白藜芦醇(Res)、PDTC和AG490 3种化学小分子对补体旁路激活致人微血管内皮细胞炎症反应相关黏附分子表达的干预作用和可能的作用机制。方法采用补体旁路激活产物作用于人微血管内皮细胞(HMEC)。TBA法检测细胞培养上清中丙二醛(MDA)的浓度,ELISA方法检测细胞培养上清中可溶性黏附分子ICAM-1、VCAM-1、E-selectin的表达,并采用多个浓度的Res、NF-κB信号通路抑制剂PDTC和JAK2信号通路抑制剂AG490预处理内皮细胞,研究3种抑制剂对细胞氧化水平和黏附分子表达的干预作用。利用Western blot检测补体旁路激活产物作用于内皮细胞对NF-κB p65磷酸化的影响及3种抑制剂的干预作用。结果 HMEC受补体旁路激活产物刺激后,导致细胞培养上清中MDA浓度升高,NF-κB p65磷酸化和黏附分子ICAM-1、VCAM-1和E-selectin的表达上调。Res可降低细胞培养上清中MDA的浓度。Res、PDTC和AG490能抑制NF-κB p65的磷酸化。Res与PDTC能抑制内皮细胞黏附分子ICAM-1和VCAM-1的表达,对E-selectin的表达有一定的抑制作用,而AG490能够明显抑制上述3种黏附分子的表达。结论 Res、PDTC和AG490对补体旁路激活产物致内皮细胞黏附分子表达上调有不同程度的抑制作用,其作用机制与NF-κB信号通路的活化有关,而JAK2可能是一个更重要的调控位点。
Aim To investigate the effect of resveratrol ( Res) , PDTC and AG490 on adhesion molecules ex-pression induced by product of activated complement alternative pathway on human microvascular endothelial cells ( HMECs) and the possible mechanisms. Meth-ods HMECs were exposed to the product of comple-ment alternative pathway activation, then the superna-tant was removed to detect the concentration of malond-ialdehyde ( MDA ) with TBA method. ELISA method was used to detect the expression of soluble ICAM-1 , VCAM-1 ( and E-selectin) in the culture supernatant. Res, PDTC and AG490 with different concentrations were used to determine their effect on cell oxidation level and adhesion molecules expression. The phospho-rylation of NF-κB p65 was detected by Western blot, and the intervention of Res, PDTC and AG490 was as-sayed by the same way. Results The activation of complements alternative pathway resulted in the phos-phorylation of NF-κB p65 , and increased the concen-tration of MDA and up-regulated the expression of ICAM-1, VCAM-1 and E-selectin. Res reduced the concentration of MDA. Res, PDTC and AG490 inhibi-ted the phosphorylation of NF-κB p65 . Res and PDTC showed similar inhibition on expression of ICAM-1 and VCAM-1 , while exhibiting little effect on expression of E-selectin, and AG490 significantly inhibited the ex-pression of the above adhesion molecules. Conclusions Res, PDTC and AG490 could inhibit the expression of adhesion molecules induced by activated complement alternative pathway, the inhibition of NF-κB pathway activation was involved in their mechanism, and JAK2 may be a more important intervention target in regula-ting adhesion molecule expression.
出处
《中国药理学通报》
CAS
CSCD
北大核心
2015年第10期1421-1426,共6页
Chinese Pharmacological Bulletin
基金
国家自然科学基金资助项目(No 31060124)
贵州省优秀科技教育人才省长专项资金资助项目[黔省专合字(2012)9号]
关键词
补体
补体旁路激活
内皮细胞
黏附分子
白藜芦醇
炎症反应
眼镜蛇毒因子
complement
complement alternative pathway(activation)
endothelial cell
adhesion molecule
resveratrol
inflammation
cobra venom factor
