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Non-steroidal anti-inflammatory drugs (NSAIDs) are frequently used as analgesics. Although the results of clinical studies indicate considerable disparity in the analgesic efficacy of NSAIDs, the pre-clinical models generally used for the study of nociception do not allow a clear distinction to be made between the analgesic properties of agents belonging to(More)
BACKGROUND We examined the changes in cerebrospinal fluid (CSF) concentrations of prostaglandin E2 (PGE2) and tumor necrosis factor-alpha (TNF-alpha) after intraplantar administration of complete Freund's adjuvant (CFA) in rats. In addition, we investigated whether different analgesic drugs orally administered at antihyperalgesic doses were able to prevent(More)
It has recently become accepted that several cytokines may affect peripheral and central nervous system functions. Consistently with these findings, accumulating evidence points toward an important role for interleukin- in the modulation of nociceptive information. Here we review the observations collected after the administration of this cytokine by(More)
Surgery stress has been shown to be associated in rat with decreased natural killer (NK) cell activity and enhancement of tumor metastasis. We have previously shown that the analgesic drug tramadol stimulates NK activity both in the rodent and in the human. In the present study, we analyze, in the rat, tramadol ability to prevent the effect of experimental(More)
Antidepressant drugs are increasingly used in the management of chronic pain. They are mainly prescribed for cancer-related pain and central pain, e.g. phantom or stump pain, post-herpetic neuropathy. However, no controlled clinical trials have validated their in either pathology. Thus, physicians still do not know whether antidepressants are really(More)
Cytokines are known to influence neuronal functions. The purpose of this study was to investigate the putative role of the cytokine interleukin-6 (IL-6) in the pathways involved in opioid-mediated responses, by using IL-6-deficient mice. We reported that with a thermal stimulus IL-6-knock-out (IL-6KO) mice presented nociceptive thresholds similar to those(More)
Interleukin-6 (IL-6) is a cytokine shown to affect brain function and to be involved in pathological neurodegenerative disorders such as Alzheimer's disease (AD). In the present study we investigated the cognitive function in transgenic mice not expressing IL-6 (IL-6 KO) and in wild type (WT) genotype at 4 and 12 months of age, using a passive avoidance and(More)
To extend the knowledge on the central effects of cytokines, we studied the effects of tumor necrosis factor alpha and interleukin-1 alpha on nociceptive thresholds and spontaneous locomotor activity in rats. After central administration, both tumor necrosis factor alpha and interleukin-1 alpha significantly (P < 0.001) increase the nociceptive thresholds(More)
Autotomy and the concentrations of beta-endorphin and Met-enkephalin in brain areas and the spinal cord were measured in Sprague Dawley, Wistar and Wistar Lewis rats thirty-five days after the section of one sciatic nerve. As expected, autotomy developed in Sprague Dawley and Wistar, but not in Wistar Lewis rats. In the Wistar Lewis, brain and spinal cord(More)