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
- 2024.9
- 수록면
- 123 - 132 (10page)
- DOI
- 10.7853/kjvs.2024.47.3.123
이용수
초록· 키워드
오류제보하기
The stressful conditions including heat stress negatively affect to the animal’s reproductive performance.
Apoptosis of granulosa cells under unexpected stimuli can influence the fate of ovarian follicles and its function. Since the changes in caspase-3, a key executioner of the apoptosis pathway, have not yet been elucidated in heat-stressed sows, this study compared its changes in the ovaries of domestic sows affected by heat stress during summer. The samples were collected at spring (23.1℃; CON group) as suitable temperature for raising pigs or at summer (34.4℃; HS group) as unavoidable chronic heat stress. It was not significant but strong tendency to release higher level of stress hormone (corticosterone) in HS group than that in CON group was identified. A significant upregulation of cleaved (activated) caspase-3 expression in HS group was identified compared to CON group, indicating that apoptosis was increased in the ovarian follicles during summer. The expression of cleaved caspase-3 in the ovaries was positively related with degree of maximal atmospheric temperature and serum levels of corticosterone. The caspase-3-positive cells were more prevalent in mature follicles with localization primarily in the granulosa cell layer than immature follicles. The intensities of caspase-3 in the granulosa cell layer were stronger in HS group than CON group. In conclusion, the present study demonstrated that chronic heat stress during summer in Korea increased activated caspase-3-related apoptosis in the granulosa cells in the mature ovarian follicles, which might suggest that heat stress decreased reproductive performance in the domestic sows during summer.
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