Abstract
Medicinal plants over time have proven to have potential to manage a huge number of diseases and disorders and thus have become a great source of pharmaceutical drugs. One of such plants is Tapinanthus bangwensis (African mistletoe). It is a semiparasitic and epiphytic plant growing on citrus tree, obtaining its food photosynthetically while its nutrient and water is got from the host plant. The aim of this study was to determine the cytotoxicological and hepatocurative effect of aqueous fraction of T bangwensis in acetaminophen (paracetamol)-induced Wistar rats. The antioxidant potential of the plant was determined by 2,2-diphenyl-1-picrylhydrazine scavenging and ferric reducing power assays. The cytotoxic effect was determined using Allium cepa test while the liver biochemical indices were determined by standard protocols. Data obtained were analyzed by 2-way analysis of variance at 95% confidence level and reported as mean ± standard deviation. The concentrated aqueous fraction of T bangwensis was found to be 23.3 g (58.25%). Quantitative determination of some vital phytochemicals revealed the following: flavonoid (84.6 ± 0.41 mg/100 g), phenol (147.5 ± 1.07 mg/100 g), tannin (31 ± 0.85 mg/ 100 g), alkaloid (23.45 ± 0.09 mg/100 g), and saponin (0.146 ± 0.0 mg/100 g). Treatment of rats with the aqueous extract of T bangwensis significantly decreased paracetamol-induced elevation of activities of liver function indices, alkaline phosphatase, alanine aminotransferase, aspartate aminotransferase, triglyceride, total cholesterol level and increased the albumin, total protein, and high-density lipoprotein levels. The plant extract also attenuated the paracetamol elevated lipid peroxidation product, malondialdehyde. The research findings suggest that aqueous extract of T bangwensis is slightly cytotoxic, possesses appreciable antioxidant property and exhibited hepatocurative effect against paracetamol-induced hepatoxicity.
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