Design and Synthesis of Novel Hydrazide-Linked Bifunctional Peptides as δ/μ Opioid Receptor Agonists and CCK-1/CCK-2 Receptor Antagonists
| Autor: | Shou Wu Ma, Yeon Sun Lee, Josephine Lai, Hamid Badghisi, Frank Porreca, Victor J. Hruby, Peg Davis, Richard S. Agnes |
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| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Male
medicine.drug_class Guinea Pigs Receptors Opioid mu In Vitro Techniques Ligands Cholecystokinin receptor digestive system Binding Competitive Article Cell Line Radioligand Assay Structure-Activity Relationship Cricetulus Opioid receptor Ileum Cricetinae Receptors Opioid delta Drug Discovery medicine Structure–activity relationship Animals Humans Receptor Oligopeptide Chemistry digestive oral and skin physiology Muscle Smooth Receptor Cholecystokinin B Rats Receptor Cholecystokinin A Hydrazines Biochemistry Opioid Drug Design Cholecystokinin B receptor Molecular Medicine Oligopeptides hormones hormone substitutes and hormone antagonists medicine.drug Muscle Contraction |
| Popis: | A series of hydrazide-linked bifunctional peptides designed to act as agonists for delta/mu opioid receptors and antagonists for CCK-1/CCK-2 receptors was prepared and tested for binding to both opioid and CCK receptors and in functional assays. SAR studies in the CCK region examined the structural requirements for the side chain groups at positions 1', 2', and 4' and for the N-terminal protecting group, which are related to interactions not only with CCK, but also with opioid receptors. Most peptide ligands that showed high binding affinities (0.1-10 nM) for both delta and mu opioid receptors generally showed lower binding affinities (micromolar range) at CCK-1 and CCK-2 receptors, but were potent CCK receptor antagonists in the GPI/LMMP assay (up to Ke = 6.5 nM). The results indicate that it is reasonable to design chimeric bifunctional peptide ligands for different G-protein coupled receptors in a single molecule. |
| Databáze: | OpenAIRE |
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