Korean J Anesthesiol Search


Korean Journal of Anesthesiology 2007;53(4):491-496.
DOI: https://doi.org/10.4097/kjae.2007.53.4.491   
The Analgesic Effects of Intrathecal Pregabalin in Rat Formalin Tests: Comparison between Pre- and Post-treatment.
Nam Ryong Cho, Tae Dong Kweon, Dong Woo Han, Kyung Bong Yoon, Youn Woo Lee
Department of Anesthesiology and Pain Medicine and Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea. ywleepain@yumc.yonsei.ac.kr
Pregabalin is an analog of gamma aminobutyric acid, and selectively interacts with the alpha-2-delta subunit of the voltage dependent calcium channels. The aims of this study were to investigate the analgesic effects of intrathecal pregabalin in rat formalin tests and to compare between the pre-treatment and post-treatment group.
All experimental animals were randomly divided into pre- and post-treatment groups. In pre-treatment groups, pregabalin (0.003g, 0.01g, 0.03g, 0.1g, n = 6 at each group) was administered through the intrathecal catheter 10 min prior to formalin injection. In post-treatment groups, pregabalin (0.01g, 0.03g, 0.1g, 0.3g, n = 6 at each group) was administered through the catheter 10 min after formalin injection. Formalin (50 ml, 5%) was injected in the left hind paw. We counted the number of flinching as a pain behavior for 60 min to quantify the nociceptive response.
The withdrawal responses which were represented by flinching count, were decreased dose dependently in the phase 2, in all groups (pre-treatment and post-treatment group), while there were less analgesic effects and ceiling effects in the phase 1. There was more significant decreasing flinching number in the pre-treatment group than that in the post-treatment group.
Intrathecal pregabalin has preemptive analgesic effect and may be useful in the management of inflammation induced hyperalgesia.
Key Words: formalin test; intrathecal pregabalin; pre- & post-treatment


Browse all articles >

Editorial Office
101-3503, Lotte Castle President, 109 Mapo-daero, Mapo-gu, Seoul 04146, Korea
Tel: +82-2-792-5128    Fax: +82-2-792-4089    E-mail: journal@anesthesia.or.kr                

Copyright © 2024 by Korean Society of Anesthesiologists.

Developed in M2PI

Close layer
prev next