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作 者:封琳[1] 刘晓婷[2] 宋欣[1] FENG Lin LIU Xiaoting SONG Xin(Department of Pathology Department of Clinical Laboratory Chinese PLA General Hospital, Beijing 100853, China)
机构地区:[1]解放军总医院病理科,北京1008531 [2]解放军总医院临检科,北京1008531
出 处:《解放军医学院学报》2017年第7期686-688,692,共4页Academic Journal of Chinese PLA Medical School
摘 要:目的环境致癌物苯并[a]芘[benzo(a)pyrene,Ba P]诱发肺癌的机制研究。方法用环境致癌物苯并[a]芘处理正常人支气管上皮(human bronchial epithelium,HBE)细胞和非小细胞肺癌细胞系H1299两种细胞系,在不同染毒剂量(0μmol/L、2.5μmol/L、5μmol/L、10μmol/L)、不同染毒时间(0 h、6 h、12 h、24 h)以及Ba P受体Ah R抑制剂α-NF存在这3个条件下,研究c-jun蛋白水平表达量的变化。结果随着Ba P剂量增加,Western bolt检测HBE和H1299的c-jun蛋白相对光密度值分别从0.04(剂量为0μmol/L)上调到0.84(剂量为10μmol/L)(P均<0.01)、从0.91(剂量为0μmol/L)上调至1.3(剂量为10μmol/L)(P<0.01);随着染毒时间增长,HBE和H1299的c-jun蛋白相对光密度值分别从0.08(染毒时间0 h)上调到0.87(染毒时间24 h)、从0.33(染毒时间0 h)上调至0.58(染毒时间24 h)(P均<0.05),c-jun蛋白表达量与Ba P染毒剂量和染毒时间呈正比;HBE细胞中加入Ah R的抑制剂α-NF后,细胞核内c-jun蛋白的相对光密度值从2.1下调至0.7(P<0.05)。结论在HBE和H1299细胞系中环境致癌物苯并[a]芘可剂量依赖及时间依赖性地上调原癌基因c-jun的表达,诱导细胞恶性转化。Objective To explore the mechanism of environmental carcinogen benzopyrene promoting the pathogenesis of lung cancer. Methods Human bronchial epithelium (HBE) cells and non-small cell lung cancer cell line H1299 were treated with benzopyrene (Bap) by different exposure doses (0 μmol/L, 2.5 μmol/L, 5 μmol/L, 10 μmol/ L), different exposure time (0 h, 6 h, 12 h, 24 h) and the presence or absence of BaP receptor AhR inhibitor α-NF,and the expressions of c-jun protein under the different conditions were evaluated. Results With the increase of BaP dose, the relative expressions of c-jun protein in HBE and H1299 were all increased from 0.04 (dose 0 μmol/L) to 0.84 (dose 10 μmol/L) (P < 0.01) and 0.91 (dose 0 μmol/L) to 1.3 (dose 10 μmol/L) (P < 0.01) ;with the increase of exposure time, the relative expressions of c-jun protein of HBE and H1299 were up-regulated from 0.08 (exposure time 0 h) to 0.87 (exposure time 24 h) (P < 0.01) and from 0.33 (exposure time 0 h) 0.58 (exposure time 24 h) (P < 0.05).The expression of c-jun protein was positively related to the dose and exposure time of BaP. After adding AhR inhibitor α-NF, the expression of c-jun protein in the nucleus decreased from 2.1 to 0.7 (P < 0.05) in HBE cells. Conclusion In HBE and H1299 cell lines, the environmental carcinogen benzopyrene induced the malignant transformation of the cells by up-regulating the expression of proto-oncogene c-jun in a dose-department and time-department manner.
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