Autoradiographic differentiation of multiple benzodiazepine receptors by detergent solubilization and pharmacologic specificity.

Abstract:

:We have used light microscopic autoradiography to localize differentially Type 1 and 2 benzodiazepine receptors using pharmacologic and detergent treatment techniques. The triazolopyridazine CL218872 has preferential affinity for Type 1 receptors from which it displaces [3H]flunitrazepam selectivity. In biochemical experiments [3H]flunitrazepam binding sites with pharmacologic properties of Type 2 receptors are preferentially solubilized from brain membranes by detergents. We have now treated rat brain slices either with CL218872 or 2% sodium cholate and evaluated the autoradiographic distribution of [3H]flunitrazepam-labeled receptors. Whether calculated from the drug or detergent treated preparations, the relative densities of apparent Type 1 and 2 receptors are the same. Thus differential sensitivity to determine solubilization distinguishes the same two populations of receptors as Type 1 and 2 specific drugs.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Lo MM,Niehoff DL,Kuhar MJ,Snyder SH

doi

10.1016/0304-3940(83)90162-3

subject

Has Abstract

pub_date

1983-08-19 00:00:00

pages

37-44

issue

1

eissn

0304-3940

issn

1872-7972

pii

0304-3940(83)90162-3

journal_volume

39

pub_type

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