目的:观察P38丝裂原活化蛋白激酶(p38 mitogen-activated protein kinase,p38 MAPK)抑制剂SB203580对TNF-α诱导的原代培养大鼠小胶质细胞高迁移率族蛋白B1(high mobility group protein B1,HMGB1)表达的影响。方法:采用原代培养大鼠小...目的:观察P38丝裂原活化蛋白激酶(p38 mitogen-activated protein kinase,p38 MAPK)抑制剂SB203580对TNF-α诱导的原代培养大鼠小胶质细胞高迁移率族蛋白B1(high mobility group protein B1,HMGB1)表达的影响。方法:采用原代培养大鼠小胶质细胞,设立对照组、TNF-α组(25 ng/m L)、TNF-α(25 ng/m L)+SB 203580组(10μmol/L)、SB203580组(10μmol/L),各组细胞经药物处理16 h后分别用ELISA法检测细胞培养上清中HMGB1的表达情况,Western印迹检测细胞HMGB1和磷酸化p38MAPK表达情况,用反转录PCR检测HMGB1 m RNA表达。结果:经TNF-α刺激后,大鼠小胶质细胞及其培养上清液中HMGB1蛋白表达增高;SB 203580可抑制TNF-α诱导的磷酸化p38 MAPK表达(P<0.01),同时下调HMGB1m RNA和HMGB1蛋白的表达。结论:TNF-α可诱导小胶质细胞晚期炎症因子HMGB1的表达,并且其诱导机制与p38 MAPK被快速激活相关。展开更多
Atherosclerosis is a chronic inflammatory disease in arteries. Nuclear factor-kappa B (NF-κB),a redox-sensitive transcription factor,has been indicated to play a critical role in both initiation and expansion of athe...Atherosclerosis is a chronic inflammatory disease in arteries. Nuclear factor-kappa B (NF-κB),a redox-sensitive transcription factor,has been indicated to play a critical role in both initiation and expansion of atherosclerosis. Activation of NF-κB activates a variety of target genes that promote inflammation,such as leukocyte adhesion molecules,cytokines,and chemokines,as well as genes that regulate cell proliferation and differentiation. Multiple risk factors relevant to atherosclerosis including hypertension,diabetes mellitus,smoking and lipoprotein disorders also activate NF-κB. Thus the activation of NF-κB may be linked to the onset of atherosclerosis.展开更多
文摘Atherosclerosis is a chronic inflammatory disease in arteries. Nuclear factor-kappa B (NF-κB),a redox-sensitive transcription factor,has been indicated to play a critical role in both initiation and expansion of atherosclerosis. Activation of NF-κB activates a variety of target genes that promote inflammation,such as leukocyte adhesion molecules,cytokines,and chemokines,as well as genes that regulate cell proliferation and differentiation. Multiple risk factors relevant to atherosclerosis including hypertension,diabetes mellitus,smoking and lipoprotein disorders also activate NF-κB. Thus the activation of NF-κB may be linked to the onset of atherosclerosis.
