Receptor subtypes for purines have been identified in a variety of tissues, increasing interest in the roles of purine-mediated signalling in pathophysiological processes. Growing evidence supports the involvement of one of the purinoceptor subtypes, P2X3, in nociception. In this article, recent studies of purine-mediated nociception and visceral pain will be discussed. Furthermore, a novel hyp...

Aims & Objectives: The present study consists in evaluation of the effects of the dipeptides Kyotorphin (Kyo) and D-Kyotorphin (D-Kyo) on nociception and plasma levels of adrenocorticotrophic hormone and corticosterone after 1 hour of heat stress in rats. Materials & Methods: Kyo and D-Kyo`s effects on nociception were evaluated by Paw pressure and Hot plate test after 1 hour of heat stress. Pl...

BACKGROUND The effect of small and high doses of intracerebroventricularly (icv) applied bradykinin (BK) on nociception produced by mechanical stimuli and the participation of B1 and B2 receptors in this nociception were investigated in rats. RESULTS BK at the lowest dose (0.06 μg) produced hyperalgesia whereas at the higher doses (6 and 12 μg) antinociception. This effect was abolished by B1...

IMPLICATIONS That IL-6 is an interesting target in the study of pain is underscored by its biomolecular properties, its localization after experimental pain, and its modulating effect on pain after administration.