Tris inhibits (+)-[3H]SKF-10,047 binding to sigma receptors.

Abstract:

:Tris-HCl is the most commonly used buffer in studies of radioligand binding to sigma receptors, with concentrations as high as 50 or 100 mM often used. We report here that these concentrations of Tris substantially inhibit (+)-[3H]SKF-10,047 binding to sigma receptors. The well-established inhibitory effect of Tris-HCl on ligand binding to PCP receptors did not contribute to the presently reported inhibition of (+)-[3H]SKF-10,047 binding. The IC50 of Tris, determined in the presence of 10 mM potassium phosphate buffer, was 15.4 +/- 1.2 mM (n = 3, pH 8.0, 25 degrees C, 1 nM radioligand). Equilibrium saturation studies revealed an apparent competitive inhibition of binding.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

McCann DJ,Su TP

doi

10.1016/0304-3940(92)90903-k

keywords:

subject

Has Abstract

pub_date

1992-07-20 00:00:00

pages

239-42

issue

2

eissn

0304-3940

issn

1872-7972

pii

0304-3940(92)90903-K

journal_volume

141

pub_type

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