煤焦沥青烟提取物诱导人支气管上皮细胞发生炎性凋亡的研究

Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases(2013)

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Abstract
目的 探讨煤焦沥青烟提取物(coal tar pitch smoke extract,CTP)刺激人支气管上皮细胞(BEAS-2B)是否发生炎性凋亡(pyroptosis).方法 用l、3μg/ml的CTP分别染毒BEAS-2B细胞8、24 h,以二甲基亚砜(DMSO)为对照,用乳酸脱氢酶(lactic dehydrogenase,LDH)活力测定试剂盒和白细胞介素-1β(Interleukin-1 beta,IL-1β) ELISA试剂盒分别检测细胞培养上清中的LDH活力和IL-1β含量,用半胱氨酸天冬氨酸特异性蛋白酶-1(caspase-1)活力测定试剂盒检测细胞caspase-1活力.结果 染毒8h,1、3 μg/ml CTP染毒组细胞中caspase-1的活力分别为(9.29±0.30) μmol/ml和(8.67±0.59) μmol/ml,均明显高于DMSO对照组[(7.42±0.59) μmol/ml],差异有统计学意义(P<0.05);1、3μg/mlCTP染毒组LDH活力和IL-1β含量与DMSO对照组的差异无统计学意义(P>0.05).染毒24 h时,1、3μg/ml染毒组与DMSO对照组细胞中caspase-1活力差异无统计学意义(P>0.05);1、3μg/ml染毒组培养液上清中LDH活力[(1323.03±28.53)、(1148.45±16.42) U/dl]和IL-1β含量[(125.37±25.00)、(92.04±19.09) pg/m]均高于对照组[LDH:(1091.93±26.64) U/dl,IL-1β:(46.20±14.43) pg/ml],差异有统计学意义(P<0.05).结论 煤焦沥青烟提取物刺激BEAS-2B细胞早期caspase-1活力升高,继之LDH酶活力及IL-1β含量均增高,可能发生pyroptosis.
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Key words
human bronchial epithelial cells,pyroptosis,smoke,coal,extract-induced
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