Effects of a non-competitive N-methyl-D-aspartate (NMDA) antagonist, tiletamine, in adult zebrafish / Kolesnikova T.O., Khatsko S.L., Shevyrin V.A., Morzherin Y.Y., Kalueff A.V. // Neurotoxicology and Teratology. - 2017. - V. 59, l. . - P. 62-67.

ISSN:
08920362
Type:
Article
Abstract:
Tiletamine is a non-competitive N-methyl-D-aspartate (NMDA) receptor antagonist chemically related to ketamine and phencyclidine. A common veterinary anesthetic drug, tiletamine is currently a Schedule III controlled substance in USA. This compound exerts sedative effects in humans and animals, also having an abuse potential, toxicity and dissociative hallucinogenic properties clinically. However, the neurotropic profile of tiletamine remains poorly understood, necessitating novel models and in-vivo screens, including non-mammalian species. Zebrafish (Danio rerio) are rapidly becoming a popular model organism for screening various CNS drugs, including those acting at NMDA receptors. Here, we investigated acute behavioral effects of 1, 5 and 10 mg/L of tiletamine on adult zebrafish. In the standard novel tank test, a 20-min immersion in 1 mg/L of tiletamine produced no overt differences from control zebrafish (receiving 0.1% DMSO vehicle), except for reduced top entries. In contrast, tiletamine at 5 and 10 mg/L exerted robust dose-dependent sedative effects in zebrafish (also darkening their skin coloration, similar to ketamine and PCP). Gas chromatography/mass spectrometry (GC/MS) analyses revealed no tiletamine peaks in control and 1 mg/L groups, but detected tiletamine peaks in zebrafish brain samples at 5 and 10 mg/L. Together, these findings demonstrate potent neurotropic effects of tiletamine in zebrafish, and their high sensitivity to this drug. Our findings also support the growing utility of fish-based aquatic screens for studying neuroactive properties of NMDA antagonists in-vivo. © 2016
Author keywords:
Aquatic screening; Central glutamatergic system; Ketamine; Sedative effects; Tiletamine; Zebrafish
Index keywords:
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DOI:
10.1016/j.ntt.2016.11.009
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Affiliations Ural Federal University, Ekaterinburg, Russian Federation; Management of Federal Drug Control Service of Russia in Sverdlovsk Region, 31 Razin Str., Ekaterinburg, Russian Federation; Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russian Federation
Author Keywords Aquatic screening; Central glutamatergic system; Ketamine; Sedative effects; Tiletamine; Zebrafish
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Correspondence Address Morzherin, Y.Y.; Ural Federal UniversityRussian Federation; email: yu.yu.morzherin@urfu.ru
Publisher Elsevier Inc.
CODEN NETEE
Language of Original Document English
Abbreviated Source Title Neurotoxicol. Teratol.
Source Scopus