Synthesis and binding characteristics of the highly specific, tritiated delta opioid antagonist [3H]TIPP

Simon T. Nevin, Geza Toth, Thi M D Nguyen, Peter W. Schiller, A. Borsodi

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The recently discovered highly specific delta opioid antagonist HTyrTicPhePheOH (TIPP) was radiolabelled by catalytic tritiation of its precursor [Tyr (3′, 5′-I2)1]TIPP. The tritiated ligand labelled rat brain membrane binding sites with a Kd value of 0.64 nM and a Bmax of 82 fmol/mg protein. Binding competition experiments with various unlabelled μ-, σ- and κ-opioid receptor ligands resulted in mu/delta and kappa/delta selectivity ratios of 600 and 9100, respectively, and thus confirmed the previously established high delta specificity of TIPP. Because of its high delta receptor affinity, extraordinary delta selectivity and low non-specific binding, [3H]TIPP represents an excellent new radioligand for the study of delta opioid receptor interactions.

Original languageEnglish
JournalLife Sciences
Volume53
Issue number5
DOIs
Publication statusPublished - 1993

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Narcotic Antagonists
delta Opioid Receptor
Ligands
Opioid Receptors
Rats
Brain
Binding Sites
Membranes
tyrosyl-1,2,3,4-tetrahydro-3-isoquinolinecarbonyl-phenylalanyl-phenylalanine
Proteins
Experiments

ASJC Scopus subject areas

  • Pharmacology

Cite this

Synthesis and binding characteristics of the highly specific, tritiated delta opioid antagonist [3H]TIPP. / Nevin, Simon T.; Toth, Geza; Nguyen, Thi M D; Schiller, Peter W.; Borsodi, A.

In: Life Sciences, Vol. 53, No. 5, 1993.

Research output: Contribution to journalArticle

Nevin, Simon T. ; Toth, Geza ; Nguyen, Thi M D ; Schiller, Peter W. ; Borsodi, A. / Synthesis and binding characteristics of the highly specific, tritiated delta opioid antagonist [3H]TIPP. In: Life Sciences. 1993 ; Vol. 53, No. 5.
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