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Brain Res Dev Brain Res. 1997 Jan 2;98(1):142-4.

Antinociceptive effects of intrathecally administered 2-methylserotonin in developing rats.

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1
Department of Nursing, Neuroscience Section, Lamar University, Beaumont, TX 77710, USA.

Abstract

The present study examined developmental patterns of antinociception mediated by the spinal 5-HT3 receptor system in the neonatal rat. Intrathecally administered 2-methylserotonin (25-100 micrograms) first produced antinociception against formalin-induced acute inflammatory pain at 10 days postnatally, with effect only at the peak dose (100 micrograms). Intrathecal 2-methylserotonin produced dose-dependent antinociception at 14 and 28 days of age that was attenuated by i.t. pretreatment with the 5-HT3 receptor antagonist MDL-72222 (10 micrograms).

PMID:
9027413
[Indexed for MEDLINE]
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