1. Academic Validation
  2. Design, synthesis, and pharmacological characterization of 4-[4, 4-dimethyl-3-(4-hydroxybutyl)-5-oxo-2-thioxo-1-imidazolidinyl]- 2-iodobenzonitrile as a high-affinity nonsteroidal androgen receptor ligand

Design, synthesis, and pharmacological characterization of 4-[4, 4-dimethyl-3-(4-hydroxybutyl)-5-oxo-2-thioxo-1-imidazolidinyl]- 2-iodobenzonitrile as a high-affinity nonsteroidal androgen receptor ligand

  • J Med Chem. 2000 Aug 24;43(17):3344-7. doi: 10.1021/jm000163y.
M E Van Dort 1 D M Robins B Wayburn
Affiliations

Affiliation

  • 1 Division of Nuclear Medicine, Department of Internal Medicine and Department of Human Genetics, The University of Michigan Medical School, Ann Arbor, Michigan 48109-0552, USA. mvandort@umich.edu
Abstract

4-[4, 4-Dimethyl-3-(4-hydroxybutyl)-5-oxo-2-thioxo-1-imidazolidinyl]-2-+ ++trif luoromethylbenzonitrile (RU 59063) is a prototype of a new class of high-affinity nonsteroidal Androgen Receptor (AR) ligands. The search for a radioiodinated AR ligand prompted us to synthesize 4-[4, 4-dimethyl-3-(4-hydroxybutyl)-5-oxo-2-thioxo-1-imidazolidinyl]-2-i odo benzonitrile (DTIB) wherein the trifluoromethyl group of RU 59063 was substituted with the similarly hydrophobic iodine atom. DTIB displayed subnanomolar binding affinity (K(i) = 0.71 +/- 0.22 nM) for the rat AR in competitive binding assays. Additionally, DTIB demonstrated potent agonist activity, comparable to that of the natural androgen 5alpha-dihydrotestosterone (DHT), in a cell-based functional assay (cotransfection assay). DTIB represents a new lead for the development of high-affinity radioiodinated AR radioligands.

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