Browsing by Author "Alli-Oluwafuyi, A."
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Item Dichlorvos Induced AChE Inhibition in Discrete Brain Regions and the Neuro-Cognitive Implications: Ameliorative Effect of Nigella Sativa.(Arak University of Medical Sciences in collaboration with the Iranian Society of Toxicology., 2017) Imam, A.; Adeboye, M. A. N.; Abdulmajeed, W. I.; Alli-Oluwafuyi, A.; Amin, A.; Ibrahim, A.; Gwadabe, S.; Poopola, N. A.Background: There has been a rise in accidental poisoning cases resulting from the indiscriminate use and exposure to Dichlorvos (DDVP), especially in developing countries, and no antidote with satisfactory efficacy is currently available. Thus, we investigated the AChE reactivation potential of Nigella sativa oil (NSO) following DDVP induced AChE inhibition patterns in the brain and the associated cognitive implications. Methods: Fourty Wistar rats were randomly divided into four groups of 10 each.; The controls were administered PBS (1 ml/kg); DDVP (8.8 mg/kg) was given to the experimental group I; while DDVP+NSO (8.8 mg/kg + 1 ml/kg) and NSO (1 ml/kg) was administered orally to the experimental groups II and III respectively. All treatments lasted for 14 consecutive days. Morris Water Maze (MWM) paradigm was used to assess the working memory, then rats were euthanized, the brain excised, three brains were fixed for histological examination (Nissl staining), and the other seven brains were homogenized for AChE activity and Ca2+ concentrations. Data were analyzed statistically, using ANOVA method and P values of ≤0.05 was considered as significant. Results: In this study, DDVP differentially inhibited AChE activities in various brain regions: cerebellum (86.1%), hippocampus (40.6%), frontal cortex (33.2%), medulla (21.5%), spinal cord (14.8%), and occipital cortex (8.9%). It reduced Ca2+ concentration, but had no effect on the delayed escape latency in the MWM, nor impaired the neuroarchitectures. NSO caused increased AChE activities, Ca2+ concentration and reduced escape latency, and improved histologic architectures. Conclusion: We concluded that NSO reactivated DDVP-induced AChE inhibition and improved memory indices, thus, it may serve as a potential treatment in the management of DDVP poisoning cases.Item Hepatoprotective Effect of Tryptophan in Carbontetrachloride-Induced Hepatotoxicity in Male Wistar Rats.(Society of Basic and Applied Physiology, 2021) Ayinde, T.O.,; Olayaki, L.A.,; Ojulari, L.S.,; Oluwasola, A.,; Abdulraheem, H.A.,; Lawal, A.Z.,; Alli-Oluwafuyi, A.In the present study, tryptophan was evaluated for its hepatoprotective effects against carbontetrachloride-induced hepatocellular injury in rats. Hepatotoxicity was induced in male SpragueDawley rats by intraperitoneal injection of CCl4 (4ml/kg) in olive oil (1:1). Tryptophan at doses of 100mg/kg and 200mg/kg was administered orally for 28 days. The hepatoprotective effect of tryptophan was evaluated by the assay of biochemical parameters viz.: alanine aminotransaminase (ALT), aspartate aminotransaminase (AST), alkaline phosphatase (ALP), total protein, albumin and lipid peroxidation. Tryptophan produced a dose-dependent significant increase (p<0.001) in serum ALP (41% & 60%), a dose-dependent decrease (p<0.001) in serum Malondialdehyde (61% & 65%), and a significant increase (p<0.001) in levels of serum protein and serum albumin, in CCl4induced hepatotoxic rats, following administration of 100 mg/kg bwand 200 mg/kg bw, respectively. The toxic effect of CCl4 in tryptophan treated groups was controlled significantly by restoration of the levels of enzymes, total protein and albumin as compared to the CCl4 treated groups. The results suggest that tryptophan is able to significantly alleviate the hepatotoxicity induced by CCl4 and may be attributed to the antioxidant property of tryptophan.