食品科学 ›› 2011, Vol. 32 ›› Issue (3 ): 228-232.

• 营养卫生 • 上一篇    下一篇

曲酸遗传毒性的研究

陈永红1,黄夏宁2,邹志飞1,谷康定2,王岚1,刘慧智1   

  1. 1.广东检验检疫技术中心 2.华中科技大学同济医学院公共卫生学院
  • 收稿日期:2010-06-03 修回日期:2011-01-11 出版日期:2011-02-15 发布日期:2011-01-13
  • 通讯作者: 陈永红 E-mail:chenyh@iqtc.cn
  • 基金资助:

    广州市科技计划项目(2007Z3-E0381);广东出入境检验检疫局科技计划项目(2005GDK56)

Genetic Toxicity of Kojic Acid: Its Effects on Mice Mironucleus and DNA Damage in CHO-K1 Cells

  • Received:2010-06-03 Revised:2011-01-11 Online:2011-02-15 Published:2011-01-13
  • Contact: Chen Yong-Hong E-mail:chenyh@iqtc.cn

摘要: 目的:研究曲酸遗传毒性及有关作用机制。 方法:采用小鼠骨髓细胞微核实验检测染色体损伤。用不同质量浓度曲酸(0、500、1000、1500、2000、2500μg/mL)诱导CHO-K1 细胞,单细胞凝胶电泳实验检测CHO-K1 细胞DNA 损伤。 结果:1/2 LD50、1/4 LD50 和1/8 LD50 不同剂量曲酸诱导昆明小鼠微核实验结果显示,各质量浓度受试组与阴性对照组差别无显著性。单细胞凝胶电泳结果显示:曲酸作用质量浓度为 1000μg/mL,作用时间为6h时,即出现轻微DNA 损伤;当曲酸作用质量浓度增大到2500μg/mL 时,出现明显的DNA 损伤。在24h 内,或其他同一作用时间段,随着曲酸作用质量浓度增加,DNA 损伤也呈增加趋势。实验未发现有明显的时间- 效应关系。结论:体内小鼠骨髓细胞微核实验未观察到曲酸明显的遗传毒性,但体外实验高质量浓度曲酸在一定时间可导致DNA 损伤。

关键词: 曲酸, 传代细胞株, 微核试验, 单细胞凝胶电泳

Abstract: Objective: To investigate the genetic toxicity and its mechanisms of kojic acid. Methods: Bone marrow micronucleus test in mice and comet assay in CHO-K1 cells were used to examine DNA damage. KM mice were randomly divided into 5 groups for 5 males and 5 females in each group. The KM mice were administered with kojic acid at doses of 1/2, 1/4, and 1/8 fold LD50 for examining DNA damage. CHO-K1 cells were treated with kojic acid at the concentrations of 0, 500, 1000, 1500, 2000 μg/mL and 2500μg/mL for comet assay at 6, 12, 24 h and 48 h, respectively. Results: After treatment with kojic acid, the ratio of micronucleus in mice did not exhibit a significant increase, compared with the negative control. The slight DNA damage in CHO-K1 cells was observed in kojic acid group at the concentration of at 1000μg/mL after 6 h incubation. Severely DNA damage was also observed when kojic acid concentration was increased to 2500μg/mL. However, no response-time relationship was observed. Conclusion: Kojic acid at the experimental conditions did not result in genetic toxicity in bone marrow cells of treated mice, but could induce DNA damage in vitro at high concentration level.

Key words: kojic acid, cell line, micronucleus test, comet assay

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