癌变·畸变·突变

• 检测研究 • 上一篇    下一篇

用TK基因突变试验评价土荆芥精油的遗传毒性

王亚男,李辛欣,王  煜,张杜宇,杨  军,马丹炜   

  1. 四川师范大学生命科学学院,四川  成都  610101
  • 收稿日期:2014-02-18 修回日期:2014-09-12 出版日期:2014-09-30 发布日期:2014-09-30
  • 作者简介:王亚男(1973- ),女,博士,副教授,研究方向:细胞毒理学。E-mail:yanan.w@163.com
  • 基金资助:

    国家自然科学基金项目(31370549),四川省教育厅重点项目(13ZA0144, 11ZA097)

Evaluation of the genetic toxicity of essential oil from Chenopodium ambrosioides L. with TK mutation assay

WANG Ya-nan,LI Xin-xin,WANG Yu,ZHANG Du-yu,YANG Jun,MA Dan-wei   

  1. College of Life Science, Sichuan Normal University, Chengdu 610101, Sichuan, China
  • Received:2014-02-18 Revised:2014-09-12 Online:2014-09-30 Published:2014-09-30

摘要:

目的: 采用TK基因突变试验评价土荆芥精油的遗传毒性,为其安全性评价提供资料。方法:土荆芥精油浓度设置分别为体积分数0.002%、0.004%、0.006%和0.008%,对L5178Y细胞进行3 h染毒处理;同时分别设二甲基亚砜(DMSO)和环磷酰胺(CP)为溶剂对照和阳性对照,微孔板法进行TK基因突变试验。检测土荆芥精油对L5178Y细胞的细胞毒性及TK基因位点突变频率。结果:随土荆芥精油浓度的增大,L5178Y细胞相对存活率(RS)、相对悬浮生长率(RSG)和相对总生长率(RTG)较溶剂对照组有下降趋势;0.008%剂量组时,RS、RSG和RTG分别为溶剂对照组的29.38%、38.13%和5.75%,表现出明显的细胞毒性;与溶剂对照组相比,突变频率(TMF)随土荆芥精油浓度增加则呈上升趋势(F=410.5,P=0.00)。TMF在土荆芥精油各浓度组间以及和阳性、溶剂对照组间的多重比较差异均有统计学意义(P<0.05)。小集落百分比(SC)均超过95%。结论:土荆芥精油具有一定的细胞毒性,可诱导L5178Y细胞TK基因位点突变频率增高,有一定的致突变性。

关键词: 土荆芥, 精油, 小鼠淋巴瘤细胞L5178Y, TK基因突变实验, 遗传毒性

Abstract:

OBJECTIVE:The genotoxicity of essential oil from Chenopodium ambrosioides L. was evaluated with TK gene mutation test to provide information for its safety. METHODS:The mouse lymphoma cells L5178Y were exposed to essential oil of C. ambrosioides at volume fraction concentrations of 0.002%, 0.004%,0.006% and 0.008% for 3 h. 1% dimethyl sulfoxide (DMSO) and 10 μg/mL cyclophosphamide (CP) were used as solvent and positive controls,respectively. TK gene mutation was assessed with microwell method to detect cytotoxicity and mutation frequency at TK locus in L5178Y cells. RESULTS:Relative survival (RS),relative suspension growth (RSG) and relative total growth (RTG) decreased when concentration of essential oil from C. ambrosioides increased,with only 29.38%,38.13% and 5.75%,respectively,in 0.008% dose group indicating significant cytotoxicity. Compared with the solvent control mutation frequency (TMF) increased with the rising concentration of essential oil(F=410.5,P=0.00). Multiple comparisons of TMT between the different essential oil groups,positive control group and solvent control group were statistically significant differences (P<0.05). The percentage of small growth mutant (SCM) was more than 95%. CONCLUSION: Essential oil from C. ambrosioides showed strong cytotoxicity and could increase mutation frequency at TK gene locus in L5178Y cells.

Key words: Chenopodium ambrosioides L, essential oil, mouse lymphoma cells L5178Y, TK gene mutation test, genotoxicity