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Abstract Title:

Central and peripheral anti-hyperalgesic effects of diosmin in a neuropathic pain model in rats.

Abstract Source:

Biomed Pharmacother. 2018 Jan ;97:310-320. Epub 2017 Nov 6. PMID: 29091880

Abstract Author(s):

Azucena Ibeth Carballo-Villalobos, María Eva González-Trujano, Francisco Pellicer, Noé Alvarado-Vásquez, Francisco Javier López-Muñoz

Article Affiliation:

Azucena Ibeth Carballo-Villalobos

Abstract:

Flavonoids are natural compounds showing anti-hyperalgesic activity in models of pain. Diosmin is a compound poorly studied in the treatment of neuropathic pain. This study evaluates the anti-hyperalgesic actions of diosmin and possible mechanisms of action involved by using a neuropathic pain model in rats. Experimental neuropathic pain was induced by chronic constriction injury (CCI) in male Wistar rats, then aesthesiometric index and plantar tests were assessed to evaluate mechanical and thermal hyperalgesia, respectively, in order to explore the analgesic effects of acute and sub-chronic treatment with diosmin. The GABA, 5-HT, D-like and opioid receptors participation, as well as levels of TNF-α, IL-1β and IL-6, were evaluated in the spinal cord and sciatic nerve tissues after acute and subchronic diosmin administration. In addition, the presence of diosmin on cerebral samples was determined by UHPLC-MS analysis. Acute and sub-chronic treatment with diosmin significantly diminished themechanical and thermal hyperalgesia induced by CCI in rats. This anti-hyperalgesic effects of diosmin were modified in the presence of naloxone (1mg/kg, i.p.) and haloperidol (0.1mg/kg, i.p.), but not by GABAand 5-HTreceptor antagonists. The anti-hyperalgesic effects of diosmin were also linked with reduced levels of TNF-α, IL-1β and IL-6. The presence of diosmin in the cerebral samples was confirmed by chromatographic analysis. In conclusion, our results provide evidence that diosmin produces significant anti-hyperalgesic effects acting at central level by an opioid and Ddopaminergic receptors participation, and at peripheral level by reducing proinflammatory cytokines.

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Sayer Ji
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