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자료유형
학술저널
저자정보
Lee, Sung-Hun (Department of Applied Biochemistry, Division of Life Science, College of Biomedical and Health Science, Konkuk University) Yang, Min-Kyu (Department of Applied Biochemistry, Division of Life Science, College of Biomedical and Health Science, Konkuk University) Lim, Jong-Hyun (Department of Applied Biochemistry, Division of Life Science, College of Biomedical and Health Science, Konkuk University) Seo, Ho-Won (Medical Science Division, Korea Research Institute of Chemical Technology) Yi, Kyu-Yang (Medical Science Division, Korea Research Institute of Chemical Technology) Yoo, Sung-Eun (Medical Science Division, Korea Research Institute of Chemical Technology) Lee, Byung-Ho (Medical Science Division, Korea Research Institute of Chemical Technology) Won, Hyung-Sik (Department of Biotechnology, Division of Life Science, College of Biomedical and Health Science, Konkuk University) Lee, Chang-Soo (Department of Applied Biochemistry, Division of Life Science, College of Biomedical and Health Science, Konkuk University) Choi, Wahn-Soo (College of Medicine, Konkuk University) Shin, Hwa-Sup (Department of Applied Biochemistry, Divisi)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제31권 제4호
발행연도
2008.1
수록면
482 - 489 (8page)

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The cardioprotective effects of KR-31762, a newly synthesized $K^+_{ATP}$ opener, were evaluated in rat models of ischemia/reperfusion (I/R) heart injury. In isolated rat hearts subjected to 30-min global ischemia followed by 30-min reperfusion, KR-31762 (3 and 10 ${\mu}M$) significantly increased the left ventricular developed pressure (LVDP) and double product (heart rate ${\times}$ LVDP) after 30-min referfusion in a concentration-dependent manner, while decreasing the left ventricular end-diastolic pressure (LVEDP). KR-31762 also significantly increased the time to contracture (TIC) during ischemic period (20.0, 22.4 and 26.4 min for control, 3 and 10 ${\mu}M$, respectively), while decreasing the release of lactate dehydrogenase (LDH) from the heart during 30 min reperfusion (30.4, 14.3 and 19.7 U/g heart weight, respectively). All these parameters except LDH release were reversed by glyburide (1 ${\mu}M$), a nonselective blocker of $K^+_{ATP}$ channel, but not by 5-hydroxydecanoate, a selective blocker of $mitoK^+_{ATP}$ channel. In anesthetized rats subjected to 45-min occlusion of left anterior descending coronary artery followed by 90-min reperfusion, KR-31762 significantly decreased the infarct size (60.8, 40.5 and 37.8% for control, 0.3 and 1.0 mg/kg, iv, respectively). KR-31762 slightly relaxed the isolated rat aorta precontracted with methoxamine ($IC_{50}:\;23.5\;{\mu}M$). These results suggest that KR-31762 exerts potent cardioprotective effects through the opening of sarcolemmal $K_{ATP}$ channel in rat hearts with the minimal vasorelaxant effects.

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