细胞外信号调节激酶/c-Jun氨基末端激酶在炭黑诱导的人胚肺成纤维细胞毒性中对激活蛋白-1信号通路的作用  

Roles of ERK/JNK in carbon black induced AP-1 cell signaling pathway changes

作　　者：康宁[1] 张夏男[2] 刘凯 钱源源 戴宇飞[1] 宋佳阳 郑玉新[3] 叶萌[1] Kang Ning;Zhang Xia’nan;Liu Kai;Qian Yuanyuan;Dai Yufei;Song Jiayang;Zheng Yuxin;Ye Meng(National Institute of Occupational Health and Poison Control,Chinese Center for Disease Control and Prevention,Beijing 100050,China;Yanjing Medical College,Capital Medical University,Beijing 101300,China;School of Public Health,Qingdao University,Qingdao 266021,China)

机构地区：[1]中国疾病预防控制中心职业卫生与中毒控制所,北京100050 [2]首都医科大学燕京医学院,北京101300 [3]青岛大学公共卫生学院,青岛266021

出　　处：《卫生研究》2021年第4期533-538,共6页Journal of Hygiene Research

基　　金：国家自然科学基金(No.91643203,81472956);职业健康风险评估与国家职业卫生标准制定项目(No.131031109000160004)。

摘　　要：目的探讨细胞外信号调节激酶(extracellular signal-regulated kinases, ERK)/c-Jun氨基末端激酶(c-Jun N-terminal kinases, JNK)在炭黑诱导的人胚肺成纤维细胞(human embryonic lung fibroblasts, HELF)毒性中对激活蛋白-1(activator protein-1,AP-1)信号通路的作用。方法分别在含0、15、30、60、120和240μg/mL炭黑的RPMI 1640培养液中培养HELF细胞24 h,用噻唑蓝比色法确定炭黑致HELF细胞毒性的剂量。100μg/mL炭黑分别处理HELF细胞(CB)、转染ERK显性失活突变体质粒(DN-ERK)HELF细胞(CB-DN-ERK)、转染JNK显性失活突变体质粒(DN-JNK)HELF细胞(CB-DN-JNK),同时设立细胞不做任何处理的对照组。CB组在染毒0、1、2、4、8、12、24和36 h用Western blot实验检测ERK、JNK、p38、c-Jun、c-Fos及其磷酸化水平,用荧光素酶法检测其AP-1活性。CB-DN-JNK和CB-DN-JNK组在染毒24 h用荧光素酶法检测AP-1活性,用Western blot实验检测ERK、JNK、c-Jun、c-Fos及其磷酸化水平。结果 CB组ERK和p-ERK蛋白表达水平在1~36 h各时间点均大于0 h时,而p38蛋白在1~36 h各时间点均小于0 h时;AP-1活性在8 h时下调至最低(0.72±0.12),在36 h时则上调至峰值(1.38±0.11);c-Fos、p-c-Fos、c-Jun蛋白表达水平在染毒1~24 h各时间点均大于0 h时,且p-c-Jun蛋白表达水平在1、2、4、8和36 h也大于0 h时。CB组AP-1活性,以及ERK、JNK、p38、c-Fos及其磷酸化蛋白水平变化呈双相模式。与CB组HELF细胞相比,虽然CB-DN-ERK组(1.02±0.04)及CB-DN-JNK组(1.09±0.10)AP-1活性差异均无统计学意义(分别为:t=0.16,P=0.88;t=0.73,P=0.50),但CB-DN-JNK组c-Fos(t=5.31,P=0.01)、p-c-Fos(t=4.33,P=0.01)、p-c-Jun(t=10.95,P<0.01),以及CB-DN-ERK组c-Fos蛋白表达水平(t=42.72,P<0.01)均显著降低。结论在炭黑诱导HELF细胞ERK、c-Jun、c-Fos及其磷酸化蛋白表达水平增高过程中,JNK正调控c-Fos、p-c-Fos、p-c-Jun蛋白表达水平,ERK正调控c-Fos蛋白表达水平。OBJECTIVE To investigate the role of ERK/JNK in the alteration of activator protein-1(AP-1) signaling pathway in human embryonic lung fibroblasts(HELFs) induced by carbon black. METHODS HELFs were cultured in RPMI 1640 medium containing 0, 15, 30, 60, 120 or 240 μg/mL carbon black for 24 h, and the appropriate dose of carbon black was determined by MTT assay result. HELFs were divided into three groups: HELFs, HELFs transfected with ERK dominant negative mutant plasmid(DN-ERK) and HELFs transfected with JNK dominant negative mutant plasmid(DN-JNK). 100 μg/mL carbon black was used to treat HELFs(CB), DN-ERK HELFs(CB-DN-ERK), DN-JNK HELFs(CB-DN-JNK), and HELFs without any treatment were considered as control group. At 0, 1, 2, 4, 8, 12, 24 and 36 h of CB and control groups HELFs, the western blot was used to detect ERK, p-ERK, JNK, p-JNK, p38, p-p38, c-Jun, p-c-Jun, c-Fos, p-c-Fos protein expression levels, and AP-1 activity was detected by luciferase method. Whereas CB-DN-ERK and CB-DN-JNK HELFs were detected only at 24 h. RESULTS Compared with the protein expression levels at 0 h, CB group HELFs ERK and p-ERK protein expression increased at each time point, whereas p38 protein expression decreased. AP-1 activity of CB group HELFs was declined to the lowest at 8 h(0.72±0.12), and upregulated to the peak at 36 h(1.38±0.11). CB group HELFs c-Fos, p-c-Fos and c-Jun protein expression levels at each time point from 1 h to 24 h were greater than those of 0 h, and p-c-Jun protein expression levels at 1 h, 2 h, 4 h, 8 h, 36 h were also greater than those of 0 h. CB group HELFs AP-1 activity, ERK, p-ERK, JNK, p-JNK, p38, p-p38, c-Jun, p-c-Jun, c-Fos, p-c-Fos protein expression levels changes followed biphasic patterns. There were no statistically significant differences in AP-1 activity between CB group HELFs(1.03±0.10) and CB-DN-ERK group(1.02±0.04) or CB-DN-JNK group(1.09±0.10) HELFs(t=0.16, P=0.88;t=0.73, P=0.50). However, compared with CB group HELFs, c-Fos(t=5.31,P=0.01), p-c-Fos(t=4.33,P=0.01), p-c-Jun(t=10.9

关 键 词：炭黑 细胞外信号调节激酶 C-JUN氨基末端激酶 激活蛋白-1 人胚肺成纤维细胞 

分 类 号：R114[医药卫生—卫生毒理学] R135.2[医药卫生—公共卫生与预防医学]