Acetalins: opioid receptor antagonists determined through the use of synthetic peptide combinatorial libraries
| Autor: | N N Chung, Richard A. Houghten, Colette T. Dooley, Peter W. Schiller |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Enkephalin
Stereochemistry medicine.drug_class Guinea Pigs Molecular Sequence Data Receptors Opioid mu Peptide In Vitro Techniques δ-opioid receptor Opioid receptor medicine Animals Amino Acid Sequence Receptor Opioid peptide Peptide sequence chemistry.chemical_classification Multidisciplinary Chemistry Brain Enkephalins Enkephalin Ala(2)-MePhe(4)-Gly(5) Rats Biochemistry μ-opioid receptor Oligopeptides Research Article |
| Zdroj: | Proceedings of the National Academy of Sciences. 90:10811-10815 |
| ISSN: | 1091-6490 0027-8424 |
| DOI: | 10.1073/pnas.90.22.10811 |
| Popis: | A synthetic peptide combinatorial library made up of 52,128,400 hexapeptides, each having an acetyl group at the N terminus and an amide group on the C terminus, was screened to find compounds able to displace tritiated [D-Ala2,MePhe4,Gly-ol5]enkephalin from mu opioid receptor binding sites in crude rat brain homogenates. Individual peptides with mu receptor affinity were found using an iterative process for successively determining the most active peptide mixtures. Upon completion of this iterative process, the three peptides with the highest affinity were Ac-RFMWMT-NH2, Ac-RFMWMR-NH2, and Ac-RFMWMK-NH2. These peptides showed high affinity for mu and kappa 3 opioid receptors, somewhat lower affinity for delta receptors, weak affinity for kappa 1 receptors, and no affinity for kappa 2 receptors. They were found to be potent mu receptor antagonists in the guinea pig ileum assay and relatively weak antagonists in the mouse vas deferens assay. These peptides represent a class of opioid receptor ligands that we have termed acetalins (acetyl plus enkephalin). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|