Complex interaction of alpha(2)-adrenoceptor binding sites with bovine brain and lung extracts containing clonidine-displacing substance.

Abstract:

:Previous studies have established that methanolic extracts of bovine brain and lung possess CDS activity with an agonist-like profile at alpha(2)-adrenoceptor binding sites (i.e., greater potency against [(3)H]-clonidine sites than against [(3)H]-RX-821001 sites). Following prolonged reflux in ethylacetate, monovalent cations and histamine were removed from the lung extract, and the resulting extract exhibited similar potency against both radioligands, indicative of an antagonist-like profile. These observations help explain the absence of biologic activity at alpha(2)-adrenoceptors in the methanolic extracts as reported in our companion paper.

journal_name

Ann N Y Acad Sci

authors

Pinthong D,Kendall DA,Wilson VG

doi

10.1196/annals.1304.026

subject

Has Abstract

pub_date

2003-12-01 00:00:00

pages

216-21

eissn

0077-8923

issn

1749-6632

journal_volume

1009

pub_type

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