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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한약리학회 The Korean Journal of Physiology & Pharmacology The Korean Journal of Physiology & Pharmacology 제22권 제6호
- 발행연도
- 2018.11
- 수록면
- 713 - 719 (7page)
- DOI
- https://doi.org/10.4196/kjpp.2018.22.6.713
이용수
초록· 키워드
오류제보하기
Dipeptidyl peptidase4 (DPP4) inhibitors such as gemigliptin are antidiabetic drugs elevating plasma concentration of incretins such as GLP-1. In addition to the DPP4 inhibition, gemigliptin might directly improve the functions of vessels under pathological conditions. To test this hypothesis, we investigated whether the acetylcholine-induced endothelium dependent relaxation (ACh-EDR) of mesenteric arteries (MA) are altered by gemigliptin pretreatment in Spontaneous Hypertensive Rats (SHR) and in Wistar-Kyoto rats (WKY) under hyperglycemia-like conditions (HG; 2 hr incubation with 50 mM glucose). ACh-EDR of WKY was reduced by the HG condition, which was significantly recovered by 1 μM gemigliptin while not by saxagliptin and sitagliptin up to 10 μM. The ACh-EDR of SHR MA was also improved by 1 μM gemigliptin while similar recovery was observed with higher concentration (10 μM) of saxagliptin and sitagliptin. The facilitation of ACh-EDR by gemigliptin in SHR was not observed under pretreatment with NOS inhibitor, L-NAME. In the endotheliumdenuded MA of SHR, sodium nitroprusside induced dose-dependent relaxation was not affected by gemigliptin. The ACh-EDR in WKY was decreased by treatment with 30 μM pyrogallol, a superoxide generator, which was not prevented by gemigliptin.
Exendin-4, a GLP-1 analogue, could not enhance the ACh-EDR in SHR MA. The present results of ex vivo study suggest that gemigliptin enhances the NOS-mediated EDR of the HG-treated MA as well as the MA from SHR via GLP-1 receptor independent mechanism.
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