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- W2003196103 abstract "Background and purpose: Allopurinol is a potent inhibitor of the enzyme xanthine oxidase, used primarily in the treatment of hyperuricemia and gout. It is well known that purines exert multiple effects on pain transmission. We hypothesized that the inhibition of xanthine oxidase by allopurinol, thereby reducing purine degradation, could be a valid strategy to enhance purinergic activity. The aim of this study was to investigate the anti‐nociceptive profile of allopurinol on chemical and thermal pain models in mice. Experimental approach: Mice received an intraperitoneal (i.p.) injection of vehicle (Tween 10%) or allopurinol (10–400 mg kg −1 ). Anti‐nociceptive effects were measured with intraplantar capsaicin, intraplantar glutamate, tail‐flick or hot‐plate tests. Key results: Allopurinol presented dose‐dependent anti‐nociceptive effects in all models. The opioid antagonist naloxone did not affect these anti‐nociceptive effects. The non‐selective adenosine‐receptor antagonist caffeine and the selective A 1 adenosine‐receptor antagonist, DPCPX, but not the selective A 2A adenosine‐receptor antagonist, SCH58261, completely prevented allopurinol‐induced anti‐nociception. No obvious motor deficits were produced by allopurinol, at doses up to 200 mg kg −1 . Allopurinol also caused an increase in cerebrospinal fluid levels of purines, including the nucleosides adenosine and guanosine, and decreased cerebrospinal fluid concentration of uric acid. Conclusions and implications: Allopurinol‐induced anti‐nociception may be related to adenosine accumulation. Allopurinol is an old and extensively used compound and seems to be well tolerated with no obvious central nervous system toxic effects at high doses. This drug may be useful to treat pain syndromes in humans." @default.
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- W2003196103 date "2008-12-24" @default.
- W2003196103 modified "2023-10-16" @default.
- W2003196103 title "Anti-nociceptive properties of the xanthine oxidase inhibitor allopurinol in mice: role of A<sub>1</sub>adenosine receptors" @default.
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- W2003196103 doi "https://doi.org/10.1111/j.1476-5381.2008.00025.x" @default.
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