Peripheral Analgesic and Anti-inflammatory Effects of Diclofenac, SC-560 and NS-398 on Acute Arthritic Model in Rats.
10.4097/kjae.2004.46.3.336
- Author:
Han Seok PARK
1
;
Ji Yong PARK
;
Hee Chul HAN
;
Hae Ja LIM
;
Seong Ho CHANG
;
Suk Min YOON
Author Information
1. Department of Anesthesia and Pain Medicine, College of Medicine, Korea University, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
diclofenac;
NS-398;
peripheral;
prostaglandin-endoperoxide synthase;
SC-560
- MeSH:
Anesthesia;
Animals;
Anti-Inflammatory Agents, Non-Steroidal;
Arachidonic Acid;
Arthritis;
Cyclooxygenase 1;
Cyclooxygenase 2;
Diclofenac*;
Dimethyl Sulfoxide;
Enflurane;
Inflammation;
Isoenzymes;
Knee Joint;
Nociception;
Prostaglandin-Endoperoxide Synthases;
Rats*
- From:Korean Journal of Anesthesiology
2004;46(3):336-341
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
BACKGROUND: Non-steroidal anti-inflammatory drugs (NSAIDs) are generally attributed to suppression cyclooxygenase enzymes, leading to decreased products of the arachidonic acid cascade. Since the discovery of two isoenzymes of cyclooxygenase, inhibition of cyclooxygenase-2 has been suggested to be responsible for therapeutic effects of NSAIDs without side effects. In the present study, to investigate the extent to peripheral nociception and inflammation of cyclooxygenase-1 and cyclooxygenase-2, diclofenac (non-selective inhibitor), SC-560 (selective cyclooxygenase-1 inhibitor) and NS-398 (selective cyclooxygenase-2 inhibitor) are injected intra-articularly on acute arthritic model in rats. METHODS: Arthritis was induced with 2% lamda-carrageenan (suspended in 50microliter normal saline) into the right knee joint cavity under enflurane anesthesia (2-4%). Before and after the injection, rats were allowed to walk freely through a pathway constructed to record weight load by means of 8 weight sensors (strain gauge type) attached to 8 plates which function independently. The weight load, diameter of both knee joints and weight of rat were measured at each test. At 4 hours and 30 minutes, diclofenac, SC-560 and NS-398 dissolved in 10% dimethyl sulfoxide were injected intra-articularly (50microgram/50microliter). RESULTS: The weight loads increased in diclofenac group at 6 and 9 hours and in NS-398 group at 24 and 48 hours after induction of arthritis. The diameter ratio decreased in diclofenac group at 12 hours after induction of arthritis. CONCLUSIONS: These results suggest that peripheral nociception and inflammation in acute model of arthritis in rats are likely related with both cyclooxygenase-1 and cyclooxygenase-2 pathways.
