Abstract
This paper describes a method of extraction of endogenous inhibitors of specific IMI binding and of 5-HT reuptake, from human blood plasma and the heterogeneity of these compounds is demonstrated. Specific binding was determined as the difference between binding of /sup 3/H-IMI in the absence and in the presence of 50 microM IMI. Under these conditions, specific binding amounted to 70-80% of total binding of /sup 3/H-IMI. It is shown that extract obtained from human blood contains a material which inhibits dose-dependently both 5-HT reuptake and specific binding of /sup 3/H-IMI. Gel-chromatography of extracts of human blood plasma on Biogel P-2 is also shown.
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