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Stress-induced Alterations in Mast Cell Numbers and Proteinase-activated Receptor-2 Expression of the Colon:Role of Corticotrophin-releasing factor
- Alternative Title
- 김동훈
- Author(s)
- Kim, Dong Hoon
- Alternative Author(s)
- 김동훈
- Advisor
- 이광재
- Department
- 일반대학원 의학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2013-02
- Language
- eng
- Keyword
- Corticotrophin-releasing factor; Enterochromaffin cells; Irritable bowel syndrome; Mast cells; Proteinase-activated receptor-2; Stress
- Alternative Abstract
- This study was performed in order to assess whether acute stress can increase mast cell and enterochromaffin (EC) cell numbers, and proteinase-activated receptor-2 (PAR2) expression in the rat colon. In addition, we aimed to investigate the involvement of corticotrophin-releasing factor in these stress-related alterations. Eighteen adult rats were divided into 3 experimental groups: (1) a saline-pretreated non-stressed group, (2) a saline-pretreated stressed group, (3) an astressin-pretreated stressed group. The numbers of mast cells, EC cells, and PAR2-positive cells were counted in 6 high power fields. In proximal colonic segments, mast cell numbers of stressed rats tended to be higher than those of non-stressed rats, and their PAR2-positive cell numbers were significantly higher than those of non-stressed rats. In distal colonic segments, mast cell numbers and PAR2-positive cell numbers of stressed rats were significantly higher than those of non-stressed rats. Mast cell and PAR2-positive cell numbers of astressin-pretreated stressed rats were significantly lower than those of saline-pretreated stressed rats. EC cell numbers did not differ among the three experimental groups. Acute stress in rats increases mast cell numbers and mucosal PAR2 expression in the colon. These stress-related alterations seem to be mediated by release of corticotrophin-releasing factor.
- Fulltext
- Appears in Collections:
- Graduate School of Ajou University > Department of Medicine > 3. Theses(Master)
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