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Research Article

Cloning and Expression of the Rhesus Monkey Oxytocin Receptor

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Pages 15-24 | Published online: 26 Sep 2008
 

Abstract

The oxytocin receptor belongs to the family of G-protein-coupled receptors (GPCRs) characterized by seven transmembrane spanning domains and memediates numerous neurotransmitter and hormonal functions. The cloning of this receptor was initiated to validate the use of the rhesus monkey (Macaca mulatta) as a viable animal model for therapeutic development of oxytocin receptor antagonists by ruling out potential species variations that are sometimes present among GPCRs. The rhesus monkey oxytocin receptor was cloned by the polymerase chain reaction (PCR) and expressed transiently in 293/EBNA cells. The cDNA encodes a protein of 389 amino acids and is highly homologous to that from other species, especially the human receptor which exhibits 97% identity to the rhesus protein. The cloned receptor shows a very similar pharmacological profile to the human oxytocin receptor for a variety of agonists and antagonists from various structural classes. These results substantiate the validity of the rhesus monkey as a useful model for the evaluation of human therapeutics.

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