Effects of naringenin on allodynia and hyperalgesia in rats with chronic constriction injury-induced neuropathic pain.

Objective: To study the analgesic effects of naringenin on chronic constriction injury (CCI) model of neuropathic pain.

Methods: After inducing of neuropathic pain by CCI, treatment with 25 and 50 mg/kg of naringenin and 10 mg/kg of pregabalin was given. Rats were evaluated for behavioral tests using Hargreaves apparatus for thermal hyperalgesia, pin prick test for tactile mechanical hyperalgesia and cold water-induced allodynia on days 0, 3, 5, 7, 14 and 21. At the end of study, oxidative stress parameters were measured.

Results: Naringenin showed ameliorating action against CCI-induced neuropathic pain in all the tested models. Also, naringenin attenuated the elevated levels of lipid peroxidation and nitric oxide, and restored the level of reduced glutathione.

Conclusion: The results of the present investigation suggest that naringenin exhibits analgesic effect in sciatic nerve injury model.