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Abstract
Gentamicin is an antibiotic used worldwide for treating Gram-negative bacterial infections. Gentamicin causes nephrotoxicity in up to 25% of therapeutic cases owing to increased production of free radicals. Kiwifruit are nutrient-dense fruits that have proven effective for ameliorating many pathological conditions caused by oxidative stress. We investigated the possible prophylactic and therapeutic effects of kiwifruit on the changes in renal histology and histochemistry caused by gentamicin. Intramuscular injection of mice with gentamicin for 10 consecutive days was nephrotoxic as indicated by epithelial vacuolization, glomerular atrophy and tubular necrosis. Necrotic tubule cells lost most of their polysaccharides and structural proteins. Co-administration of kiwifruit with gentamicin prevented nephrotoxic changes to a modest degree. When administered subsequent to gentamicin intoxication, kiwifruit ameliorated significantly the histological and histochemical alterations caused by gentamicin. Our findings support the use of kiwifruit in cases of acute renal injury due to gentamicin.