Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 2 de 2
Filter
Add more filters










Database
Language
Publication year range
1.
Life Sci ; 56(8): 629-35, 1995.
Article in English | MEDLINE | ID: mdl-7869841

ABSTRACT

[125I]L-735,286, a new potent and AT1-selective nonpeptide angiotensin II receptor radioligand, bound saturably to whole adrenal membranes. Scatchard and Hill plot analysis indicates a single class of high affinity (Kd = 0.5 nM) binding sites. The potencies of various angiotensin II agonists and antagonists in displacing specific [125I]L-735,286 binding are in good agreement with their potencies in displacing the binding of [125I]Sar1,Ile8-AII to adrenal AT1 receptors. The AT2 selective ligand, PD121981 had no effect on specific [125I]L-735,286 binding. In autoradiographic studies using rat kidney slices, specific labeling of [125I]L-735,286 was abolished by coincubation with saralasin. Collectively, the data indicated that [125I]L-735,286 represents a new, potent nonpeptide antagonist radioligand suitable for the study of angiotensin II AT1 receptors.


Subject(s)
Angiotensin II/antagonists & inhibitors , Angiotensin Receptor Antagonists , Niacinamide/analogs & derivatives , Animals , Autoradiography , Kidney/chemistry , Ligands , Male , Niacinamide/metabolism , Radioligand Assay , Rats , Rats, Sprague-Dawley , Receptors, Angiotensin/analysis , Receptors, Angiotensin/metabolism
2.
Life Sci ; 53(25): 1879-86, 1993.
Article in English | MEDLINE | ID: mdl-8255148

ABSTRACT

A high affinity radioligand for bradykinin B2 receptors was prepared by coupling an activated ester of [125I]4-iodobenzoic acid to the amino terminus nitrogen of the potent B2 antagonist HOE 140. The ligand, [125I]para-iodophenyl HOE 140 ([125I]PIP HOE 140), bound to a homogeneous set of sites in guinea pig ileal membranes with an equilibrium dissociation constant of 15 pM and a maximal binding density of 193 fmole/mg protein. Competition studies with a number of BK-related peptides indicated that the ligand specifically labeled B2 receptors in the preparation. The results suggest that [125I]PIP HOE 140 will be a useful tool for future studies of B2 receptors.


Subject(s)
Bradykinin/analogs & derivatives , Ileum/metabolism , Receptors, Bradykinin/metabolism , Amino Acid Sequence , Animals , Binding, Competitive , Bradykinin/antagonists & inhibitors , Bradykinin/chemical synthesis , Bradykinin/metabolism , Bradykinin/pharmacology , Cell Membrane/metabolism , Guinea Pigs , Iodine Radioisotopes , Kinetics , Male , Molecular Sequence Data , Muscle, Smooth/metabolism , Radioligand Assay , Receptors, Bradykinin/drug effects , Receptors, Bradykinin/isolation & purification
SELECTION OF CITATIONS
SEARCH DETAIL
...