生物技术通报 ›› 2013, Vol. 0 ›› Issue (12): 84-87.

• 研究报告 • 上一篇    下一篇

热应激对小鼠十二指肠组织形态和Caspase-3表达的影响

罗奕秋, 迟大明, 李思奇, 王菲, 李延森, 李春梅   

  1. 南京农业大学动物科技学院,南京 210095
  • 收稿日期:2013-06-20 出版日期:2013-12-20 发布日期:2013-12-20
  • 作者简介:罗奕秋,男,研究方向:动物环境生理与营养学;E-mail:35110117@njau.edu.cn
  • 基金资助:
    江苏省高等学校大学生实践创新训练计划项目(2012JSSPITP0216)

Effects of Heat Stress on the Architecture and Caspase-3 Expression in the Duodenum of Mice

Luo Yiqiu, Chi Daming, Li Siqi, Wang Fei, Li Yansen, Li Chunmei   

  1. College of Animal Science and Technology ,Nanjing Agricultural University ,Nanjing 210095
  • Received:2013-06-20 Published:2013-12-20 Online:2013-12-20

摘要: 旨在阐明热应激对小鼠十二指肠形态结构的影响及其分子机制,8周龄ICR雄性小鼠,每天热处理2 h(环境温度42℃),连续12 d,分别在热处理第0、4、8和12天后,通过HE染色和免疫组织化学法观察小鼠十二指肠形态变化及Caspase-3蛋白的表达。结果显示,小鼠体表温度和直肠温度在热处理后显著升高(P <0.05)。随着热暴露天数的增加,小鼠十二指肠上皮细胞脱落,肠绒毛随着热处理天数增加而缩短,细胞凋亡蛋白Caspase-3表达随着热处理天数增加而增加。热处理引起小鼠热应激,热应激使小鼠的十二指肠形态结构受损,绒毛长度变短,细胞凋亡蛋白Caspase-3表达增加。

关键词: 热应激, 小鼠, 十二指肠, 组织形态, Caspase-3

Abstract:  To investigate the effect of heat stress on the morphology of the duodenum and its molecular mechanism in mouse, eight-week-old mice were exposed to the elevated ambient temperature(42℃ )daily for 2 h. During the period of 12 consecutive days, mice were sacrificed on days 4, 8 and 12 immediately following heat exposure. The duodenum morphological changes were observed by HE staining and immunohistochemical detection of Caspase-3 expression in the duodenum. Heat-exposed mice presented significant increases in rectal and body surface temperature(P <0.05). With the increase of heat treatment days, the lengths of duodenal villus become shortened and epithelial cells loss. The Caspase-3 protein expression is elevated in the duodenal villus of heated-mice. These results suggest that heat stress damage to the duodenum morphology and increase the expression of apoptosis protein Caspase-3 in the mice.

Key words: Heat stress, Mice, Duodenum, Architecture, Caspase-3