Abolfazl Abbaszadeh - Department of Surgery, Lorestan University of Medical Sciences, Khorramabad, Iran
Saeideh Darabi - ۲Razi Herbal Medicines Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
Amin Hasanvand - ۲Razi Herbal Medicines Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
Hossein Amini-Khoyi - Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
Amir Abbasnezhad - Nutritional Health Research Center, Department of Nutrition, Lorestan University of Medical Sciences, Khorramabad, Iran
Razieh Choghakhori - Nutritional Health Research Center, Department of Nutrition, Lorestan University of Medical Sciences, Khorramabad, Iran
Asghar Aaliehpour - Department of Pathology, Lorestan University of Medical Sciences, Khorramabad, Iran

Objective(s): Several lines of evidence showed that minocycline possesses antioxidant and anti-inflammatory properties. This study aimed to demonstrate the effects of minocycline in rats subjected to chronic constriction injury (CCI). Materials and Methods: In this study four groups (n = ۶–۸) of rats were used as follows: Sham, CCI, CCI + minocycline (MIN) ۱۰ mg/Kg (IP) and CCI + MIN ۳۰ mg/Kg (IP). On days ۳, ۷, ۱۴, and ۲۱ post-surgery hot-plate, acetone, and von Frey tests were carried out. Finally, Motor Nerve Conduction Velocity Evaluation (MNCV) assessment was performed and spinal cords were harvested in order to measure tissue concentrations of TNF_α, IL-۱β, Glutathione peroxidase (GPx), Superoxide dismutase (SOD) and Malondialdehyde (MDA). Extent of perineural inflammation and damage around the sciatic nerve was histopathologically evaluated. Results: Our results demonstrated that CCI significantly caused hyperalgesia and allodynia twenty-one days after CCI. MIN attenuated heat hyperalgesia, cold and mechanical allodynia and MNCV in animals. MIN also decreased the levels of TNF_α and IL-۱β. Antioxidative enzymes (SOD, MDA, and GPx) were restored following MIN treatment. Our findings showed that MIN decreased perineural inflammation around the sciatic nerve. According to the results, the neuropathic pain reduced in the CCI hyperalgesia model using ۳۰ mg/kg of minocycline. Conclusion: It is suggested that antinociceptive effects of minocycline might be mediated through the inhibition of inflammatory response and attenuation of oxidative stress.

Chronic constriction-, Injury, Inflammatory response, Minocycline, Neuropathic pain, Oxidative stress, Rat