High- and low-affinity binding components for [3H]imipramine in rat cerebral cortex.

Abstract:

:The present study demonstrates that [3H]imipramine binds to both high- and low-affinity imipramine binding components on membranes prepared from rat cerebral cortex. Scatchard and computer analyses of saturation experiments using a wide range of [3H]imipramine concentrations (0.5 nM-50 nM) revealed the presence of two binding components. Inhibition experiments in which membranes were incubated with [3H]imipramine and various concentrations of unlabelled imipramine gave shallow inhibition curves with a Hill coefficient of 0.60 +/- 0.04. When dissociation rates of imipramine were studied, biphasic dissociation curves were obtained with apparent half-times of dissociation of 2.5 +/- 0.4 min and 18.5 +/- 2.5 min. Thus analysis of saturation, competition, and dissociation experiments indicate that [3H]imipramine binds to low as well as high-affinity binding sites in rat cortex.

journal_name

J Neurochem

authors

Conway PG,Brunswick DJ

doi

10.1111/j.1471-4159.1985.tb05494.x

subject

Has Abstract

pub_date

1985-07-01 00:00:00

pages

206-9

issue

1

eissn

0022-3042

issn

1471-4159

journal_volume

45

pub_type

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