Discovery of artificial VIPR2-antagonist peptides possessing receptor- and ligand-selectivity.
Biochem Biophys Res Commun
; 503(3): 1973-1979, 2018 09 10.
Article
em En
| MEDLINE
| ID: mdl-30077368
ABSTRACT
Vasoactive intestinal peptide receptor 2 (VIPR2, also known as VPAC2) is a class B G-protein coupled receptor (GPCR) and plays important roles in the physiology of central nervous system (CNS) by interaction with natural ligands; vasoactive intestinal peptide (VIP) and pituitary adenylate cyclase-activating polypeptide (PACAP). Because it has been reported that high-expression and/or overactivation of VIPR2 link to schizophrenic symptoms, VIPR2 antagonists could be good drug candidates for schizophrenia therapeutics. In this study, we discovered several artificial peptides that antagonize both human and rodent VIPR2 with selectivities against receptor subtypes VIPR1 (also known as VPAC1) and pituitary adenylate cyclase-activating polypeptide type-1 receptor (PAC1). Of them, the representative 16-mer cyclic peptide VIpep-3 (Ac-CPPYLPRRLCTLLLRS-OH) exhibited strong binding affinity with KD value of 41â¯nM to extracellular domain of human VIPR2 in SPR analysis and showed potent antagonist activity with IC50 values of 47â¯nM (human), 180â¯nM (mouse), and 44â¯nM (rat) against VIP-VIPR2 signal in cell-based Ca influx assay. This is not only the first report on artificial VIPR2-selective antagonist peptides but also good example of the effective approach to discover novel antagonist against class B GPCR. Our peptides will contribute to study and development of the novel CNS drugs targeting to VIPR2.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Peptídeo Intestinal Vasoativo
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Polipeptídeo Hipofisário Ativador de Adenilato Ciclase
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Receptores Tipo II de Peptídeo Intestinal Vasoativo
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Descoberta de Drogas
Limite:
Animals
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Humans
Idioma:
En
Revista:
Biochem Biophys Res Commun
Ano de publicação:
2018
Tipo de documento:
Article