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Current Neuropharmacology


ISSN (Print): 1570-159X
ISSN (Online): 1875-6190

Antidepressant-like Effects of δ Opioid Receptor Agonists in Animal Models

Author(s): Akiyoshi Saitoh and Mitsuhiko Yamada

Volume 10 , Issue 3 , 2012

Page: [231 - 238] Pages: 8

DOI: 10.2174/157015912803217314

Price: $65


Recently, δ opioid receptor agonists have been proposed to be attractive targets for the development of novel antidepressants. Several studies revealed that single treatment of δ opioid receptor agonists produce antidepressant-like effects in the forced swimming test, which is one of the most popular animal models for screening antidepressants. In addition, subchronic treatment with δ opioid receptor agonists has been shown to completely attenuate the hyperemotional responses found in olfactory bulbectomized rats. This animal model exhibits hyperemotional behavior that may mimic the anxiety, aggression, and irritability found in depressed patients, suggesting that δ opioid receptor agonists could be effective in the treatment of these symptoms in depression. On the other hand, prototype δ opioid receptor agonists produce convulsive effects, which limit their therapeutic potential and clinical development. In this review, we presented the current knowledge regarding the antidepressant-like effects of δ opioid receptor agonists, which include some recently developed drugs lacking convulsive effects.

Keywords: Anxiety, depression, KNT-127, naltrindole, SNC80, TAN-67

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