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Agonist and antagonist profiles of [D-Ala2,Glu4]deltorphin and its [Cys4]- and [Ser4]-substituted derivatives: further evidence of opioid delta receptor multiplicity. 1993

P J Horan, and K D Wild, and A Misicka, and A Lipkowski, and R C Haaseth, and V J Hruby, and S J Weber, and T P Davis, and H I Yamamura, and F Porreca
Department of Pharmacology, University of Arizona, Tucson.

Pharmacological evidence has suggested the presence of two supraspinal opioid delta receptor subtypes in the mouse, termed delta-1 and delta-2. [D-Pen2,D-Pen5]enkephalin (DPDPE) is thought to be primarily an agonist at the opioid delta-1 subtype, whereas H2N-Tyr-D-Ala-Phe-Glu-Val-Val-Gly-NH2 ([D-Ala2,Glu4]deltorphin) is a selective agonist at the delta-2 subtype. Based on previous reports suggesting that a receptor sulfhydryl group may be critical for ligand binding to the opioid delta receptor, the present investigation has attempted to discover whether this concept extends to the opioid delta-2 receptor. For this purpose, a cysteine-substituted deltorphin was synthesized and the potential agonist and antagonist properties of this compound, H2N-Tyr-D-Ala-Phe-Cys-Val-Val-Gly-NH2 ([D-Ala2,Cys4]deltorphin), were evaluated in an antinociceptive assay after i.c.v. administration to mice and stability in mouse brain was determined. As a control a serine-substituted deltorphin was also prepared and the potential agonist and antagonist properties of this compound, H2N-Tyr-D-Ala-Phe-Ser-Val-Val-Gly-NH2 ([D-Ala2,Ser4]deltorphin), as well as those of the parent deltorphin, [D-Ala2,Glu4]deltorphin, were evaluated. Acutely, [D-Ala2,Cys4]deltorphin, [D-Ala2,Ser4]deltorphin and [D-Ala2,Glu4]deltorphin each produced dose-related antinociceptive effects.(ABSTRACT TRUNCATED AT 250 WORDS)

UI MeSH Term Description Entries
D008297 Male Males
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D009842 Oligopeptides Peptides composed of between two and twelve amino acids. Oligopeptide
D001923 Brain Chemistry Changes in the amounts of various chemicals (neurotransmitters, receptors, enzymes, and other metabolites) specific to the area of the central nervous system contained within the head. These are monitored over time, during sensory stimulation, or under different disease states. Chemistry, Brain,Brain Chemistries,Chemistries, Brain
D003545 Cysteine A thiol-containing non-essential amino acid that is oxidized to form CYSTINE. Cysteine Hydrochloride,Half-Cystine,L-Cysteine,Zinc Cysteinate,Half Cystine,L Cysteine
D004743 Enkephalin, Leucine One of the endogenous pentapeptides with morphine-like activity. It differs from MET-ENKEPHALIN in the LEUCINE at position 5. Its first four amino acid sequence is identical to the tetrapeptide sequence at the N-terminal of BETA-ENDORPHIN. Leucine Enkephalin,5-Leucine Enkephalin,Leu(5)-Enkephalin,Leu-Enkephalin,5 Leucine Enkephalin,Enkephalin, 5-Leucine,Leu Enkephalin
D000595 Amino Acid Sequence The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION. Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D000700 Analgesics Compounds capable of relieving pain without the loss of CONSCIOUSNESS. Analgesic,Anodynes,Antinociceptive Agents,Analgesic Agents,Analgesic Drugs,Agents, Analgesic,Agents, Antinociceptive,Drugs, Analgesic
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D012694 Serine A non-essential amino acid occurring in natural form as the L-isomer. It is synthesized from GLYCINE or THREONINE. It is involved in the biosynthesis of PURINES; PYRIMIDINES; and other amino acids. L-Serine,L Serine

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