癌变·畸变·突变 ›› 2008, Vol. 20 ›› Issue (4): 322-324.doi: 10.3969/j.issn.1004-616x.2008.04.019

• 检测研究 • 上一篇    下一篇

β_胡萝卜素对丝裂霉素C致小鼠骨髓细胞遗传损伤的保护作用

张新旺/ 杨建一/ 李 莉/ 杜圣家   

  1. 山西医科大学基础医学院,山西 太原 030001
  • 收稿日期:2007-06-26 修回日期:2007-10-30 出版日期:2008-07-30 发布日期:2008-07-30

Effect of β_carotene on Genetic Damage Induced by Mitomycin_C in Bone Marrow Cells of Mice

ZHANG Xin_wang,YANG Jian_yi,LI Li,DU Sheng_jia   

  1. Shanxi Medical University, Taiyuan 030001, China
  • Received:2007-06-26 Revised:2007-10-30 Online:2008-07-30 Published:2008-07-30

摘要: 背景与目的: 探讨β_胡萝卜素(β_carotene,βC)对丝裂霉素C(mitomycin_C,MMC)诱导的小鼠骨髓细胞遗传损伤的保护作用。 材料与方法: 分别用3 mg/kg和30 mg/kg的βC连续饲喂小鼠8 d后,以2 mg/kg MMC进行腹腔注射染毒,另设阳性对照组(用生理盐水)和阳性对照组(一次性腹腔注射MMC 2 mg/kg)。各组于末次给药后12、24 h处死小鼠,分别采用单细胞凝胶电泳技术和染色体畸变分析检测骨髓细胞DNA损伤及染色体畸变情况。 结果: 两个不同剂量的βC与MMC联合作用组小鼠骨髓细胞拖尾率、平均尾长及染色体畸变率均低于阳性对照组(单独MMC),但均高于阴性对照组,差异均有统计学意义(P<0.01)。 结论: βC对MMC诱导的小鼠骨髓细胞遗传损伤有明显的保护作用,但在实验所给剂量范围内(3~30 mg/kg)并不能完全抑制MMC所造成的遗传损伤。

关键词: β_胡萝卜素;丝裂霉素C;单细胞凝胶电泳;染色体畸变, DNA损伤

Abstract: BACKGROUND AND AIM: To assess the protective effects of β_carotene(βC) on DNA damage induced by mitomycin_C (MMC) in bone marrow cells of mice. MATERIALS AND METHODS: Two batches of mice were primed orally with βC in concentrations of 3 and 30 mg/kg for 8 days and then followed by MMC intraperitoneal injection at dose of 2 mg/kg on day 9. DNA and chromosome damage were examined by single cell gel electrophoresis(SCGE) and chromosome aberrations analysis. RESULTS: The comet frequency, tail length and the chromosomal aberration rate of two doses of βC were significantly lower than those of the MMC group. CONCLUSION: To some extent,βC could protect the bone marrow cells of mice from damage induced by MMC in vivo.

Key words: β_carotene, mitomycin_C, SCGE, chromosomal aberrations, DNA damage