Elsevier

Neuroscience Letters

Volume 126, Issue 1, 13 May 1991, Pages 67-70
Neuroscience Letters

Analgesic effects of centrally administered aminoglycoside antibiotics in mice

https://doi.org/10.1016/0304-3940(91)90373-2Get rights and content

Abstract

The possible analgesic effects of i.c.v. administration of several aminoglycoside antibiotics were evaluated in mice using hot plate and tail flick tests. Neomycin (10–80 μg/mouse), gentamicin (40–160 μg/mouse) and kanamycin (80–320 μg/mouse) produced dose-dependent increases in the latencies to forepaw licking and jumping in hot plate test. These drugs also produced dose-dependent increases in the percentage of animals showing analgesia in tail flick test. The order of potency of these aminoglycoside antibiotics in both tests was neomycin > gentamicin > kanamycin, which is exactly the same order that these drugs show as N-type calcium channel blockers. Bearing in mind this fact and the well known analgesic activity of several drugs which decrease neuronal calcium availability, we suggest that the mechanism of aminoglycoside-induced antinociception may be related to the capacity of these antibiotics to block N-type calcium channels and decrease neuronal calcium availability.

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