인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2007.6
- 수록면
- 127 - 131 (5page)
이용수
초록· 키워드
Although the mechanism of stress-induced gastric ulcer has not been defined yet, it is clear that gastric ulcer is occurred by stress. Moreover, the gastric ulcerogenic action of corticosteroids that increase in blood during stress is controversial. To elucidate the involvement of corticosteroids in stress-induced gastric ulceration, we used adrenalectomized or macrophage-depleted animals. Rats were bilaterally-adrenalectomized and were given saline solution as a drinking water for 6 days. Separately, the animals for macrophage depletion were intraperitoneally administered with silica (SiO₂, 500 ㎎/㎏) for 6 days prior to challenge with water-immersion restraint stress (WIRS) for 4 hr. Adrenalectomy greatly reduced blood cortisol concentrations. Also, silica treatment lowered the number of macrophages to 48% of control and the differential count from 7.34% in normal animals to 2.48%, leading to a marked decrease in blood cortisol and corticosterone levels. WIRS significantly enhanced corticosteroid levels in normal and sham operated rats, and induced severe gastric ulcers. In contrast, adrenalectomy and silica treatment remarkably attenuated the stress-induced gastric ulceration, reducing the ulcer index to 30% and 10% of control level, respectively. Taken together, it is suggested that compensatory secretion of corticosteroids following macrophage activation may playa role in stress-induced gastric ulceration.
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목차
- Materials and Methods
- Results
- Discussion
- References
참고문헌
참고문헌 신청최근 본 자료
UCI(KEPA) : I410-ECN-0101-2009-510-016363320