Mechanistic exploration of quercetin against metronidazole induced neurotoxicity in rats: Possible role of nitric oxide isoforms and inflammatory cytokines.

Neurotoxicology
Swati ChaturvediMuhammad Wahajuddin

Abstract

Metronidazole, a nitroimidazole derived antibiotic used to treat many bacterial infections, is reported to penetrate the blood brain barrier after long term administration resulting into neuronal toxicity. Further, quercetin, a polyphenol flavonoid is reported to exhibit neuroprotective activity but its pharmacodynamics interaction against metronidazole induced neurotoxicity. Therefore, the present study was designed to evaluate the postulated mechanism of metronidazole induced neurotoxicity and potential neuroprotective role of quercetin. Animals (Sprague Dawley) rats were randomly divided into five groups such as control, metronidazole (135 mg/kg), quercetin (100 mg/kg), metronidazole (135 mg/kg) + quercetin (50 mg/kg), and metronidazole (135 mg/kg) + quercetin (100 mg/kg). The brain tissues were evaluated for tissue cyclo-oxygenase, lipoxygenase, nitrite levels, inflammatory and antioxidant biomarkers. The brain tissues were further scrutinized histopathologically for neuronal degeneration. Western blotting analysis was performed for the localization of protein expression for Bax, Bcl2, iNOS, eNOS and caspase-3. The metronidazole significantly alters the antioxidant levels, inflammatory mediators and morphological changes in...Continue Reading

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Aug 11, 2021·Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia·Minjia Xiao, Xiang Huang

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