摘要
目的探讨姜黄素对脂多糖(LPS)诱导人支气管上皮细胞三磷酸肌醇激酶(P13K)、蛋白激酶B(Akt)、外调节蛋白激酶(F,RK)、核转录因子一KB(NF—KB)、不规则趋化因子(CX3CLl)表达的影响:方法体外培养人支气管上皮细胞24h后,用计算机生成的随机分配法表分为空白组(CK)、LPS(10mg/L)组、PD组(LPS+ERK抑制剂PD98059,25μmol/L)、LY组(LPS+P13K/Akt抑制剂LY294002,20μmol/L)、PDTC组(LPS+NF—KB抑制剂PDTC,100μmol/L)、cur组(LPS+姜黄素,10ixmol/L)6组。各组阻断剂预处理30rain后给予LPS刺激,加药后作用4h,用蛋白质免疫印迹试验(WesternBlot)检测各组P13K、Akt、ERK、NF—KB、CX3CLl表达,测定各条带吸光度(A)值。结果与CK组比较,LPS组P13K、Akt、ERK、NF—KB、CX3CLl表达均显著升高[P13K(A值):0.68±0.05比0.49±0.09,Akt(4值):0.54±0.03比0.30±0.06,ERK(4值):1.09±0.09比0.74±0.05、NF—KB(A值):1.87±0.15比0.57±0.30,CX3CLl(A值):0.62±0.12比0.34±0.00,均P〈0.05j。与LPS组比较,PD组、PDTC组P13K、Akt、ERK、NF—KB、CX3CLl表达均明显下降[P13K(A值):0.37±0.06、0.38±0.16比0.68±0.05,Akt(4值):0.33±0.07、0.33±0.12比0.54±0.03,ERK(A值):0.67±0.05、0.82±0.26比1.09±0.09,NF—KB(A值):0.73±0.19、0.97±0.41比1.87±0.15,CX3CLl(A值):0.43±0.07、0.32±0.03比0.62±0.12,均P〈0.05]; 组能明显抑制P13K、Akt、ERK、NF—KB表达[PI3K(A值):0.44±0.04比0.68±0.05,Akt(A值):0.30±0.10比0.54±0.03,ERK(A值):0.78±0.05比1.09±0.09,NF—KB(A值):0.78±0.17比1.87±0.15,均P〈O.05]。结论人支气管上皮细胞存在LPs—ERK、NF—KB--CX3CLl信号通路,姜黄素可抑制LPS诱导人支气管上皮细胞后P13K/Akt、ERK、NF—KB的表达。
Objective To approach the effect of curcumine on the expressions of phosphoinositide 3-kinase (PI3K), protein kinase B (Akt), extracellular regulated protein kinase (ERK), nuclear factor-kB (NF-kB), and inordinate fractalkine (CX3CL1) of human bronchial epithelial cells induced by lipopolysaecharide (LPS). Methods Human bronchial epithelial cells were collected and cultured for 24 hours, and they were divided into blank group (CK), LPS (10 mg/L) group, PD group (LPS + ERK inhibitor PD98059, 25 μmol/L), LY group (LPS + PI3K/Akt inhibitor LY294002, 20 9μmol/L), PDTC group (LPS + NF-kB inhibitor PDTC, 100 μmol/L), cur group (LPS + cureumine, 10 μmol/L). The cells in each group were stimulated by LPS after 30-minute pre-treatment of inhihitors. The cells were cultured for 4 hours, and the expressions of PI3K, Akt, ERK, NF-KB, and CX3CL1 were determined with Western Blot, and the absorbance (A) values in all the straps were assessed. Results Compared with CK group, the expressions of PI3K, Akt, ERK, NF-KB, and CX3CLI in LPS group were significantly increased [PI3K (A value): 0.68 ± 0.05 vs. 0.49 ± 0.09, Akt (A value): 0.54± 0.03 vs. 0.30±0.06, ERK (A value): 1.09 ± 0.09 vs. 0.74 ± 0.05, NF-nB (A value): 1.87± 0.15 vs. 0.57 ± 0.30, CX3CL1 (A value): 0.62 ± 0.12 vs. 0.34 ± 0.00, all P 〈 0.05]. Compared with LPS group, the expressions of PI3K, Akt, ERK, NF-KB, and CX3CL1 in PD group and PDTC group were significantly decreased [PI3K (A value): 0.37± 0.06, 0.38 ± 0.16 vs. 0.68±0.05, Akt (A value): 0.33 ± 0.07, 0.33 ±0.12 vs. 0.54 ±0.03, ERK (A value): 0.67± 0.05, 0.82± 0.26 vs. 1.09 ±0.09, NF-KB (A value): 0.73± 0.19, 0.97± 0.41 vs. 1.87 ±0.15, CX3CL1 (A value): 0.43 ±0.07, 0.32 ± 0.03 vs. 0.62 ±0.12, all P 〈 0.05], and the expressions of PI3K, Akt, ERK, and NF-KB were depressed in cur group [PI3K (A value): 0.44 ± 0.04 vs. 0.68 ±0.05, Akt (A value): 0.30 ± 0.10 vs. 0.54 ± 0.03, ERK (A value): 0.78 ±0.05 vs. 1.09 ±0.09, NF-KB (A value): 0.78 ± 0.17 vs. 1.87 ± 0.15, all P 〈 0.05]. Conclusions LPS- ERK and NF-KB-CX3CL1 signal pathways were found in human bronchial epithelial cells. Curcumine could inhibit the expressions of PI3K/Akt, ERK, and NF-KB.
出处
《中国中西医结合急救杂志》
CAS
北大核心
2015年第3期239-242,共4页
Chinese Journal of Integrated Traditional and Western Medicine in Intensive and Critical Care
基金
浙江省自然科学基金(LY12H29005)
浙江省卫生高层次创新人才培养工程项目(2014-108)
浙江省中西医结合重点学科建设项目(2012-XK-A12)