Spinal antinociceptive effects of AA501, a novel chimeric peptide with opioid receptor agonist and tachykinin receptor antagonist moieties.

Abstract:

:The use of "multimodal" combination analgesic therapies or novel single molecules possessing multiple analgesic targets is becoming increasingly attractive. In previous experiments we showed that a substance P antagonist injected intrathecally potentiated the antinociceptive effects of potent opioid receptor agonist, biphalin. Based on examination of the biphalin structure-activity relationship, we designed and synthesized a novel chimeric peptide, termed AA501 (N'(Tyr-D-Ala-Gly-Phe), N"(Z-Trp) hydrazide, Z=benzyloxycarbonyl). AA501 consists of an opioid receptor agonist pharmacophore related to biphalin and a substance P receptor antagonist pharmacophore, both linked by a hydrazide bridge. The present study evaluates the ability of a novel chimeric peptide, AA501, to bind to opioid and substance P receptors and to produce antinociception in tail-flick and formalin tests, and in a neuropathic pain model when administered intrathecally to rats.

journal_name

Eur J Pharmacol

authors

Bonney IM,Foran SE,Marchand JE,Lipkowski AW,Carr DB

doi

10.1016/j.ejphar.2004.02.023

keywords:

subject

Has Abstract

pub_date

2004-03-19 00:00:00

pages

91-9

issue

1-3

eissn

0014-2999

issn

1879-0712

pii

S0014299904001578

journal_volume

488

pub_type

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