Butanol extracts from myelin fragments-2-Some properties of 5-hydroxytryptamine binding

  • ISHITANI Ryoichi
    Department of Pharmacology, Faculty of Pharmaceutical Sciences, Josai University
  • MIYAKAWA Akihisa
    Department of Pharmacology, Faculty of Pharmaceutical Sciences, Josai University
  • IWAMOTO Takio
    Department of Pharmacology, Faculty of Pharmaceutical Sciences, Josai University

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タイトル別名
  • Butanol extracts from myelin fragments-II. Some properties of 5-hydroxytryptamine binding.
  • Butanol extracts from myelin fragments
  • Butanol extracts from myelin fragments-. Some properties of 5-hydroxytryptamine binding

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抄録

The myelin fragments of rat brain stem were treated with butanol-water mixtures, and the butanol extracts (total extract=TE) were incubated with 5×10-7 M of C14•5-HT. After incubation, protein, lipid phosphorus and radioactivity were analyzed by Sephadex LH20 column chromatography. Two peaks of components eluted in chloroform-methanol 4:1 (peak I and II) showed the binding capacity for C14•5-HT. The displacement studies with unlabeled 5-HT (5×10-4 M) suggested that peak II was the saturable binding component to 5-HT. On the other hand, butanol extracts from the synaptic membranes of rat brain stem did not show binding for C14•5-HT. Various compounds were studied to determine their inhibitory effects on the saturable binding of 5-HT to TE. The results indicated that acetylcholine, dopamine and tryptamine inhibited the 5-HT binding but LSD, reserpine, colchicine, vinblastine, 5-hydroxytryptophan (5-HTP) and 5-hydroxy-3-indole acetic acid (5-HIAA) had no effect.

収録刊行物

  • Jpn.J.Pharmacol.

    Jpn.J.Pharmacol. 28 (6), 899-907, 1978

    公益社団法人 日本薬理学会

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