中文摘要：

目的 探讨2，2’，4，4’-四溴联苯醚（PBDE-47）对人神经母细胞瘤细胞株（SH-SY5Y）氧化应激的影响和DNA损伤作用。方法 用含10％胎牛血清的DMEM培养基在37℃、5％CO2：条件下培养SH-SY5Y细胞。当培养细胞处于对数生长期时，用1、2、4、6、8和10μg／ml PBDE-47进行染毒，24h后检测细胞存活率、细胞外乳酸脱氢酶（LDH）漏出率、超氧化物歧化酶（SOD）活性、还原型谷胱甘肽（GSH）和丙二醛（MDA）含量，以及DNA损伤情况。结果与对照组相比，1μg／ml和2μg／ml剂量组细胞存活率略有上升（P〈0．05），4、6、8和10ug／ml剂量组细胞存活率显著降低（P〈0．05）；各染毒剂量组GSH含量显著下降（P〈0．05）、尾矩显著上升（P〈0．05）；4、8和10ug／ml剂量组MDA含量明显高于对照组（P〈0．05）；4、6、8和10,ug／ml剂量组LDH漏出率显著高于对照组（P〈0．05）、SOD活力明显低于对照组（P〈0．05）；6、8和10μg／ml剂量组尾部DNA百分率与对照组比较存在差异的显著性（P〈0．05）。结论PBDE-47可引起SH-SY5Y细胞氧化应激和DNA损伤，氧化应激可能在PBDE-47致DNA损伤中起重要作用。

英文摘要：

To investigate the effects of 2,2＇,4,4＇-polybrominated diphenyl ethers （PBDE-47） on oxidative stress and DNA damage in human neuroblastoma cells （SH-SY5Y cells）. Methods SH-SY5Y cells were cultured in DMEM supplemented with 10% fetal bovine serum at 37℃ in a humidified incubator with 95% air and 5% CO2. The rate of cellular survivors, LDH leakage, contents of MDA and GSH, activity of SOD, and DNA damage were measured after exponentially growing cells were incubated with 1, 2, 4, 6, 8 and 10μg/ml PBDE-47 for 24 hours in vitro. Results The rate of cellular survivors in the low dose PBDE-47-treated groups（ 1μg/ml and 2μg/ml） were higher than the control group （P 〈 0.05）, but those in the high dose PBDE-47-treated groups （4, 6, 8 and 10μg/ml） were significantly lower than the control group （P 〈 0.05）. Compared with the control group, the GSH content were significantly decreased （P 〈 0.05） and DNA tail moment were significantly increased with increasing PBDE-47 concentrations.The MDA content in the high PBDE-treated groups （4, 8 and 10μg/ml） were notably higher than the control group and increased with increasing PBDE-47 concentrations （P 〈 0.05）. In the high PBDE-treated groups （4, 6, 8 and 10μg/ml）, the LDH leakage were markedly higher and the SOD activity were markedly lower than the control group（ P 〈 0.05）. The percentage of DNA in the tail in the high PBDE-treated groups （6,8 and 10μg/ml） were visibly higher than the control group （ P 〈 0.05）. Conclusion PBDE-47 could induce oxidative stress and DNA damage in SH-SY5Y cells. The oxidative stress may play an important role in the DNA damage induced by PBDE-47.