Alcohol is currently recognized as the most prevalent known cause of abnormal human health. Furthermore, the liver remains the most commonly affected organs following alcohol abuse. The effect of Allium cepa against alcohol-induced hepatic damage in rabbits was investigated in the present study. Rabbits were divided into four groups; The Allium cepa-alone group received physiological saline 5 mL kg-1 b.wt., daily per oral (p.o) for 60 days followed by Allium cepa 100 mg kg-1 b.wt., daily p.o for another 60 days. The alcohol-alone group was given alcohol 5 mg kg-1 b.wt., daily p.o for 60 days followed by saline 5 mL kg-1 b.wt., daily p.o for another 60 days. The alcohol plus Allium cepa group were similarly given alcohol, but had Allium cepa 100 mg kg-1 b.wt, daily p.o post-treatment for another 60 days. Another group of rabbits were given peanut oil (the vehicle) 100 mg kg-1 b.wt., daily p.o, for 60 days, after saline 5 mL kg-1 b.wt., daily p.o for 60 days to serve as the control. The gross anatomical parameters of the liver and liver histology were assessed. Liver oxidative stress was evaluated by liver Superoxide dismutase (SOD), catalase (CAT), Glutathione Peroxidase (GPx), reduced glutathione (GSH) and malondialdehyde (MDA) assays. In addition, the activities of the biomarker enzymes of the liver (alanine transaminase, aspartate transaminase, alkaline phosphatase and gamma-glutamyl transpeptidase) were assayed. An assessment of the histological profiles of the liver showed a derangement of the liver cytoarchitecture following alcohol abuse and a marked improvement was observed after Allium cepa administration. Similarly, Allium cepa improved the reduction of antioxidant parameters (SOD, CAT, GPx and GSH) and the increased MDA and serum hepatic markers levels caused by alcohol ingestion. It was concluded that Allium cepa may offer protection against free radical mediated oxidative stress of rabbits with alcohol-induced hepatotoxicity.
B. Ogunlade, L.C. Saalu, O.S. Ogunmodede, G.G. Akunna, O.A. Adeeyo and G.O. Ajayi, 2012. The Salutary Role of Allium cepa Extract on the Liver Histology, Liver Oxidative Status and Liver Marker Enzymes of Rabbits Submitted to Alcohol-induced Toxicity. American Journal of Biochemistry and Molecular Biology, 2: 67-81.