首都医科大学学报 ›› 2007, Vol. 28 ›› Issue (2): 225-228.

• 基础研究 • 上一篇    下一篇

多巴胺能细胞在大鼠消化道不同部位分布的比较

田岳民, 陈昕, 王伟, 朱进霞   

  1. 首都医科大学基础医学院生理学教研室
  • 收稿日期:2006-11-30 修回日期:1900-01-01 出版日期:2007-04-24 发布日期:2007-04-24
  • 通讯作者: 朱进霞

The Comparison of Distribution of Dopaminergic Cells and Different Expression of Gene TH and DAT among the Gastrointestinal Tract of Rat

Tian Yuemin, Chen Xin, Wang Wei, Zhu Jinxia   

  1. Department of Physiology, School of Basic Medical Sciences, Capital Medical University
  • Received:2006-11-30 Revised:1900-01-01 Online:2007-04-24 Published:2007-04-24

摘要: 目的 比较正常大鼠消化道不同部位多巴胺能细胞的分布性差异。方法 用免疫荧光组织化学法观察多巴胺转运蛋白(DAT)在正常大鼠的胃、十二指肠、回肠以及结肠的分布,提取正常大鼠上述部位组织总RNA,反转录成cDNA后,用酪氨酸羟化酶(TH)与DAT基因特异性引物进行聚合酶链反应(PCR),并做半定量检测。结果 确定了多巴胺能细胞在正常大鼠胃、十二指肠、回肠以及结肠的具体分布情况。发现TH与DAT基因在消化道不同部位的表达有差异。结论 正常大鼠消化道存在着大量多巴胺能细胞,它们可能通过分泌多巴胺来调节消化道的分泌与吸收功能。

关键词: 多巴胺能细胞, 酪氨酸羟化酶, 多巴胺转运蛋白, 消化道

Abstract: Objective To study the different expression of dopaminergic cells in different parts of rat gastrointestinal tract. Methods Immunofluorescence was used to study the distribution of DAT in stomach, duodenum, ileum and colon of normal rats. Total RNA was isolated from some of these parts of rats, and subjected to reverse transcription and amplification with TH and DAT specific primers for semi-quantity PCR detection. Results DAT-immunoreactive cells were detected in stomach, duodenum, ileum and colon of normal rats. There were significant differences of TH and DAT mRNA expression in different parts of GI tract of rats. Conclusion Dopaminergic cells are substantially and differently expressed in different parts of rat gastrointestinal tract. They might be involved in the regulation of GI mobility as well as secretion and absorption by dopamine release.

Key words: dopaminergic cells, tyrosine hydroxylase, dopamine transporter, gastrointestinal tract

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