Cited by 245Neuroendocrine regulation and behaviorNeuropeptides and Animal PhysiologyCardiovascular, Neuropeptides, and Oxidative Stress Research

125I-labelled d(CH2)5[Tyr(Me)2,Thr4,Tyr-NH29]OVT: a selective oxytocin receptor ligand

Elands, Jack, Barberis, Claude, Jard, Serge, Tribollet, Eliane, Dreifuss, Jean-Jacques, Bankowski, Krzysztof, Manning, Maurice, Sawyer, Wilbur H.·1988·European Journal of Pharmacology

Abstract

An oxytocic antagonist, [1-(beta-mercapto-beta, beta-cyclopentamethylenepropionic acid,2-O-methyltyrosine,4-threonine, 8-ornithine,9-tyrosylamide]vasotocin (d(CH2)5[Tyr(Me)2, Thr4,Tyr-NH2(9)]OVT [corrected], was monoiodinated at the phenyl moiety of the tyrosylamide residue at position 9. 125I-labelling was performed with 1,3,4,6-tetrachloro-3 alpha,6 alpha-diphenyl-glycoluril. Iodination resulted in an increased affinity for rat uterine oxytocin receptors. A considerably lower affinity for rat vascular V1- and renal V2-receptors was found, resulting in a highly specific oxytocin receptor ligand. 125I-labelled d(CH2)5[Tyr(Me)2,Thr4,Tyr-NH2(9)]OVT [corrected] was demonstrated to bind selectively to one population of binding sites in rat uterus and ventral hippocampal membrane preparations. Dissociation constants ranged between 0.03 and 0.06 nM. After 3 days of exposure autoradiography revealed binding in regions known to contain oxytocin receptors as well as labelling in some new regions, while no binding was found in the lateral septum, a structure containing mainly [8-arginine]vasopressin receptors. The high specific radioactivity of 125I-labelling allowed important reductions in membrane protein amount, gain in precision of binding analysis as well as considerably lower exposure times for autoradiography.

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Crossref · 10.1016/0014-2999(88)90778-9

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Authors
Elands, J., Barberis, C., Jard, S., Tribollet, E., Dreifuss, J.-J., Bankowski, K., Manning, M., & Sawyer, W. H.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • University of Toledo Medical Center (US)
  • Columbia University (US)
Corresponding author
Barberis, Claude
Venue
European Journal of Pharmacology
Publisher
Elsevier BV
Published
1988-03
Volume
147
Issue
2
Pages
197-207
ISSN
0014-2999 (ISSN-L)
OpenAlex
W2070821979
Cited by
245
References
33
Citations by year
2026: 1 · 2024: 2 · 2023: 3 · 2021: 5 · 2020: 2 · 2019: 4 · 2018: 3 · 2017: 1 · 2016: 4 · 2015: 1 · 2014: 1 · 2013: 3 · 2012: 3
FWCI
27.26
Type
journal article
Language
en
Open access
closed
Locations
  • European Journal of Pharmacology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of General Medical Sciences (GM25280)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-01940)
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Health Sciences › Medicine › Surgery › Cardiovascular, Neuropeptides, and Oxidative Stress Research
Keywords
oxytocin receptor, arginine vasotocin, iodine-125 labeling, iodination, receptor antagonists, receptor selectivity, ventral hippocampus, binding affinity, autoradiography
MeSH terms
Animals, Autoradiography, Brain Chemistry, Chromatography, High Pressure Liquid, Female, Iodine Radioisotopes, Kidney, Ligands, Liver, Oxytocin, Rats, Inbred Strains, Receptors, Angiotensin, Uterus, Receptors, Oxytocin, Rats, In Vitro Techniques

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