NitroglycerineのPGI2産生こう進機序における制御機構について  [in Japanese] Regulation mechanism for the enhancement of PGI2 generation by nitroglycerine.  [in Japanese]

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Author(s)

    • 丹羽 勇 NIWA Isamu
    • 京都府立医科大学第二内科 The Second Department of Internal Medicine, Kyoto Prefectural University of Medicine
    • 沢田 昌平 SAWADA Shohei
    • 京都府立医科大学第二内科 The Second Department of Internal Medicine, Kyoto Prefectural University of Medicine
    • 前防 則彦 MAEBO Norihiko
    • 京都府立医科大学第二内科 The Second Department of Internal Medicine, Kyoto Prefectural University of Medicine
    • 辻 肇 TSUJI Hajime
    • 京都府立医科大学第二内科 The Second Department of Internal Medicine, Kyoto Prefectural University of Medicine
    • 三上 欽司 MIKAMI Kinji
    • 京都府立医科大学第二内科 The Second Department of Internal Medicine, Kyoto Prefectural University of Medicine
    • 豊田 武夫 TOYODA Takeo
    • 京都府立医科大学第二内科 The Second Department of Internal Medicine, Kyoto Prefectural University of Medicine
    • 林 謙宏 RIN Kenhiro
    • 京都府立医科大学第二内科 The Second Department of Internal Medicine, Kyoto Prefectural University of Medicine
    • 中川 雅夫 NAKAGAWA Masao
    • 京都府立医科大学第二内科 The Second Department of Internal Medicine, Kyoto Prefectural University of Medicine

Abstract

Previously we reported that nitroglycerine (NTG) enhances the PGI<sub>2</sub> generation via activation of phospholipase A2 of arachidonic acid cascade in the cultured human vascular endothelial cells. This paper reports the effects of NTG on the PGI<sub>2</sub> generation with reference to cyclic nucleotide metabolism. In the presence of MIX, intracellular cAMP or cGMP level was increased and PGI<sub>2</sub> generation of the endothelial cells was decreased. Addition of NTG had no effect on the level of intracellular cAMP in this experimental system, while cGMP was increased 1.21 folds by NTG. Addition of dibutyryl CAMP or 8-bromo cGMP increased intracellular cAMP or cGMP and diminished PGI<sub>2</sub> generation. Addition of exogenous PGI<sub>2</sub> caused the increase of intracellular cAMP level without affecting cGMP level. Through these experiments, it is speculated that enhancement of PGI<sub>2</sub> generation is regulated by increased CAMP due to increased PGI2, that is negative feedback mechanism of PGI2 generation, and that increase of cGMP level by NTG may also regulate PGI2 generation.

Journal

  • Blood & Vessel

    Blood & Vessel 16(1), 71-73, 1985

    The Japanese Society on Thrombosis and Hemostasis

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