尼古丁对PDLFs 细胞NF-κB和p53表达的影响  

Nicotine induced periodontal ligament fibroblasts (PDLFs) apoptosis through NF-κB and p53 pathway

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作  者:王军[1] 曹艳[2] 李利利[3] 孙克勤[3] 陈显久[4] 

机构地区:[1]山西医科大学公共卫生学流行病学教研室、校长办公室,太原030001 [2]山西医科大学口腔医学系口腔修复学教研室 [3]山西医科大学口腔医学系口腔内科学教研室 [4]山西医科大学基础医学院生物化学与分子生物学教研室、口腔医学系口腔基础医学教研室

出  处:《中国医师杂志》2011年第1期5-8,共4页Journal of Chinese Physician

基  金:山西省自然科学基金资助(2008011085)

摘  要:目的探讨尼古丁诱导人牙周膜成纤维细胞(PDLFs)凋亡的信号转导机制。方法用不同浓度的尼古丁作用PDLFs细胞24h后,测定NF—κB、p53、I-κB和Caspase3的基因表达水平。结果尼古丁作用于PDLFs细胞24h后,p53表达水平明显上调,而NF—κB表达水平明显下调,I—κB和Caspase3蛋白表达上调。尼古丁作用于PDLFs细胞24h后,NF-κB的表达水平随着尼古丁剂量的增加而呈逐渐下降(r=0.707、F=33.705、P〈0.01);I-κB的表达水平随之增加(r=0.964、F=374.883、P〈0.01)。p53的基因表达水平随着尼古丁剂量的增加呈逐渐上调趋势(r=0.957、F=153.377、P〈0.01)。随着尼古丁剂量的增加Caspase3的基因转录逐渐增高(r=0.935、F=318.371、P〈0.01),同时Caspase3蛋白表达也逐渐增高(r=0.677、F=8.459、P〈0.05)。结论尼古丁诱导人PDLFs细胞凋亡是通过NF—κB和p53因子转录活化了Caspase3而激发了凋亡事件的发生。Objective To study the signal transduction mechanism of nicotine induced periodontal ligament fibroblasts (PDLFs) apoptosis. Methods This study used 1 μg/ml, 10μg/ml and 100μg/ml nicotine to intervene PDLFs cells for 24h separately. NF-κB, p53, I-κB and Caspase3 expression were detected. Results After Nicotine was done on PDLFs cells for 24h, the transcription of p53, and Caspase3, and the translation of Caspase 3 protein were increased, while NF-κB was decreased. At the same time, the transcription of NF-κB decreased gradually with the concentration of nicotine increased ( r = 0. 707, F = 33. 705, P 〈0. 01 ) , nevertheless, I-κB was reversed ( r =0. 964, F =374. 883, P 〈0. 01 ). p53 expression was increased gradually with the concentration of nicotine increased ( r = 0. 957, F = 153. 377, P 〈 0. 01).Both Caspase 3 mRNA (r =0.935, F =318.371, P 〈0.01) and protein ( r =0.677, F = 8. 459, P 〈 0. 05 )increased gradually. Conclusion Nicotine induced PDLFs apoptosis was mediated through NF-KB and p53 pathway.

关 键 词:尼古丁/投药和剂量 细胞凋亡 牙周膜/代谢/药物作用 成纤维细胞/代谢/药物 作用 NF-κB/代谢/药物作用 肿瘤抑制蛋白质p53/代放谢/药物作用 

分 类 号:R78[医药卫生—口腔医学]

 

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