The Enhancing Effects of Amastatin, Phosphoramidon and Captopril on the Potency of [Met5]-Enkephal n in Rat Vas Deferens

  • CUI Suying
    Department of Physiology, Institute of Clinical Research, China-Japan Friendship Heping North Street
  • KAJIWARA Midori
    Department of Pharmacology, School of Medicine, Tokai University
  • ISHII Kaori
    Department of Pharmacology, School of Medicine, Tokai University
  • AOKI Kazuko
    Department of Pharmacology, School of Medicine, Tokai University
  • SAKAMOTO Junshi
    Department of Pharmacology, School of Medicine, Tokai University
  • MATSUMIYA Teruhiko
    Department of Pharmacology, School of Medicine, Tokai University
  • OKA Tetsuo
    Department of Pharmacology, School of Medicine, Tokai University

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タイトル別名
  • The enhancing effects of amastatin, phosphoramidon and captopril on the potency of (Met5)-enkephalin in rat vas deferens.

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抄録

The enkephalin-inactivating enzymes in rat vas deferens were studied by using the relatively specific inhibitor of each enzyme. The results showed that the rat vas deferens, like the other three preparations, guinea-pig ileum, mouse vas deferens and striatal membranes of guinea-pig brain, which had been investigated previously, contained three distinct enkephalin-hydrolyzing peptidases. Additionally, the enkephalin-hydrolyzing aminopeptidase, endopeptidase-24.11 and peptidyl dipeptidase A in rat vas deferens were found to be inhibited maximally with 1 μ of amastatin, 1 μM of phosphoramidon and 1 μM of captopril, respectively. In contrast to these three enzymes, both L-tyrosyl-L-tyrosine-sensitive dipeptidyl aminopeptidase and D-phenylalanine-sensitive carboxypeptidase were suggested not to be involved significantly in the inactivation of exogenously given enkephalin in rat vas deferens. The characteristics of the enkephalin-degradative enzymes in rat vas deferens were discussed in terms of their similarities to and differences from those in the other preparations.

収録刊行物

  • Jpn.J.Pharmacol.

    Jpn.J.Pharmacol. 42 (1), 43-49, 1986

    公益社団法人 日本薬理学会

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