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作 者:曾明[1] 黄婷[2] 易吉平 钟才高[1] 关岚[1] 王安[1] 刘新民[1]
机构地区:[1]中南大学公共卫生学院卫生毒理学系,长沙410008 [2]长沙市疾病预防控制中心理化检验科,长沙410001
出 处:《生态毒理学报》2014年第1期159-166,共8页Asian Journal of Ecotoxicology
基 金:湖南省科学技术厅科技计划一般项目(2009FG3025);中南大学研究生创新工程项目(2009ssxt024)
摘 要:摘要:为探讨41%草甘膦水溶液(农达)对雄性生殖细胞的毒性及其作用机制以及N-乙酰半胱氨酸(N-acetylcysteine,NAC)的干预效应。以GC.1小鼠精原细胞为受试细胞,设正常对照组、草甘膦染毒组(60、90、120、150、180mg·L-1)、NAC干预组(10mmol·L NAC+90mg·L-1农达)。MTT法检测细胞存活率,Giemsa染色法观察细胞的形态学改变,彗星试验检测细胞DNA损伤,比色法检测细胞培养液乳酸脱氢酶(LDH)以及细胞内超氧化物歧化酶(SOD)、谷胱甘肽(GSH)及丙二醛(MDA)水平的变化。结果显示,随着草甘膦染毒浓度增加,细胞存活率逐渐下降妒〈0.01),彗星阳性率逐渐升高(P〈0.01);与对照组相比,草甘膦染毒组LDH活性增加(P〈0.05,60mg·L-1组除外),MDA生成量增多(P〈0.05),GSH含量降低(P〈0.05)和SOD活性降低(P〈0.05)。抗氧化剂NAC预处理具有相应的拮抗作用。研究表明,60~180mg·L。浓度草甘膦对GC-1细胞有明显的损伤作用,其机制可能是草甘膦诱导氧化应激,导致细胞通透性增加和DNA损伤。抗氧化剂NAC对草甘膦的细胞毒性具有一定保护作用。To study the cytotoxicity of 41% aqueous glyphosate solution (Roundup)to mice spermatogonium (GC-1 spgs) and the antagonistic and protective effects of N-acetylcysteine (NAC), the cultured GC-1 spgs were divided into groups: normal control group, Roundup groups (60, 90, 120, 150, 180 mg .L-1) and NAC inter- vention group (10 mmol·L-1 NAC +90 mg·L-1 Roundup). MTT assay was used to measure relative viability of GC-1 sags, Giemsa staining was used to observe the morphological features of GC-1 spgs, DNA damage of GC-1 spgs was detected by using the single cell gel electrophoresis (SCGE), and the activities of leaking lactate dehydrogenase (LDH) from the cytoplasm, the cellular superoxide dismutase (SOD) activities and the ma- Ionic aldehyde (MDA) and glutathione (GSH) levels were measured by colorimetry method. Results indicated that Roundup induced the decrease of cell viability (P 〈0.01) and the increase of the positive rate of comet- like cells (P 〈0.01) with a dose-dependent manner. Compared with controls, Roundup could increase the leak- age ofLDH (P〈0.05, except for 60 mg.LI group) and cellular MDA levels (P 〈0.05), and reduce cellular SOD activities (P 〈0.05) and GSH levels (P 〈0.05). NAC pretreatment could antagonize the cytotoxicity of Roundup. It is demonstrated that Roundup injures GC-1 spgs in the concentration range of 60 mg·L-1 to 180 mg·L-1. The mechanism may include that Roundup induces oxidative stress and results in increase of cell membrane penetra- bility and DNA damage. NAC could protect GC-I spgs against glyphosate injury by inhibiting oxidation.
关 键 词:草甘膦 GC-1精原细胞 氧化应激 DNA损伤 N-乙酰半胱氨酸(NAC)
分 类 号:X171.5[环境科学与工程—环境科学]
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