实验动物与比较医学 ›› 2020, Vol. 40 ›› Issue (5): 415-.DOI: 10.3969/j.issn.1674-5817.2020.05.009

• 论著 • 上一篇    下一篇

裸鼹鼠心脏对60Coγ射线辐射耐受的初步研究

李煜1*,刘尹航2*,陈超1   

  1. 1. 海军军医大学基础医学院实验动物学教研室,上海 200433;
    2. 上海外国语大学附属中学,上海 200083
  • 收稿日期:2020-08-01 出版日期:2020-10-15 发布日期:2020-11-19
  • 作者简介:李煜(1992—), 硕士, 助教, 主要从事实验动物学教学及研究工作。E-mail: 591332278@qq.com 刘尹航(2002—), 学生。E-mail: liuyinhang_27@163.com *共同第一作者
  • 基金资助:
    上海市科“技创新行动计划”实验动物研究领域项目(20140900100)

Preliminary Study on Heart Tolerance to 60Coγ-ray Radiation in Naked Mole Rats#br#

LI Yu1*, LIU Yinhang2*, CHEN Chao1   

  1. 1. Department of Laboratory Animal Science, School of Basic Medical Sciences, Naval Medical University, Shanghai 200433, China;
    2. Shanghai Foreign Language School, Shanghai 200083, China
  • Received:2020-08-01 Online:2020-10-15 Published:2020-11-19

摘要: 目的    观察和分析60Coγ射线辐射后裸鼹鼠心脏形态结构及组织生化指标变化,初步研究裸鼹鼠心脏在60Coγ射线辐射耐受方面的特性。方法    裸鼹鼠经一次性10 Gy 60Coγ射线全身辐照,分别于辐照后7 d和14 d采集裸鼹鼠心脏,制作石蜡切片,经HE染色后,光学显微镜下观察其心脏显微结构;采用动物组织生化检测试剂盒检测心脏组织丙二醛(MDA)、总抗氧化能力(T-AOC)、谷胱甘肽(GSH)和氧化型谷胱甘肽(GSSG)等指标。结果   镜检显示,辐照后裸鼹鼠心脏组织并未出现明显的萎缩、水肿、坏死及纤维化等病变。生化检测显示,辐照后心脏组织中的MDA含量显著上升(P<0.01),T-AOC、GSH和GSSG含量均呈现时间相关的递减趋势(均P<0.05)。 结论    裸鼹鼠心脏对 60Coγ射线具有一定程度的耐受能力,但其具体耐受机制尚未明确。


关键词: 裸鼹鼠, 心脏, 60Coγ射线, 辐射耐受

Abstract: Objective    To observe and analyze the changes of cardiac morphology and biochemical indexes in naked mole rats after 60Coγ-ray radiation, and to preliminarily study the characteristics of 60Coγ-ray radiation tolerance in naked mole rats heart. Methods   The naked mole rats were generally radiated by the single 10 Gy 60Coγ-ray, and then their hearts were collected after 7 days and 14 days respectively. After paraffin section and hematoxylin eosin (HE) staining, the microstructure of naked mole rat heart was observed under an optical microscope, and the pathological analysis was carried out. The malondialdehyde (MDA), total antioxidant capacity (T-AOC), glutathione (GSH) and oxidized glutathione (GSSG) contents in heart tissues were detected by biochemical test kit. Results    Microscopic examination showed that there was no obvious atrophy, edema, necrosis and fibrosis in the heart tissues of naked mole rats after irradiation. According to the biochemical test, the content of MDA in heart tissues increased significantly after irradiation (P<0.01), and the T-AOC, GSH and GSSG contents decreased significantly with time (all P<0.05). Conclusion    The heart of naked mole rats can tolerate 60Coγ-ray to some extent, but the specific mechanism of tolerance is not clear.


Key words: Naked mole rat, Heart, 60Coγ-rays, Radiation tolerance

中图分类号: