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논문 기본 정보

자료유형
학술저널
저자정보
Lee, Jong-Eun (Department of Physiology, Chonnam University Medical School) Lee, Byung-Kook (Department of Physiology, Chonnam University Medical School) Ahn, Hyun-Taek (Department of Physiology, Chonnam University Medical School) Ahn, Byoung-Hee (Department of Cardiovascular Surgery, Chonnam University Medical School) Kang, Jung-Chaee (Department of Internal Medicine, Chonnam University Medical School)
저널정보
대한생리학회 대한생리학회지 대한생리학회지 제26권 제2호
발행연도
1992.1
수록면
123 - 128 (6page)

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The present study was undertaken to examine if endogenous nitric oxide is partly responsible for the high calcium induced vasorelaxation in vitro. Isolated porcine coronary arterial rings were suspended in the tissue chamber and their changes in isometric tension were recorded. KCI little affected the vascular tension in the calcium free media, but subsequent addition of cumulative doses of $CaCl_3$ from 1 to 40 mM caused a contraction followed by complete relaxation. The maximum tension was noted at the calcium concentration in the media of 5 mM, and then the tension progressively declined at 10-40 mM. The relaxation was slightly attenuated in the endothelium-denuded preparation. The relaxation was converted into a contraction by the addition of methylene blue. The relaxation response was not affected in the presence of indomethacin, but was significantly attenuated by $N^w-nitro-L-arginine$ methyl ester pretreatment. These results suggest that the calcium induced vasorelaxation is in part attributable to the release of endogenous nitric oxide.

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