Browsing by Author "Aremu, A"

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    Oxidative stress involvement in chronic chlorpyrifos -induced hepatocellular injury: Alleviating effect of vitamin C
    (Faculty of Veterinary Medicine, University of Ilorin, 2018) Ambali, S.F.; Shittu, M; Akorede, G.J; Olatunji, A; Aremu, A; Ibrahim, N.D.G.; Ramon-Yusuf, S.B.
    Introduction: Chlorpyrifos (CPF), a phosphorothionate chlorinated organophosphate (OP) insecticide is widely used in agriculture and public health. Like other OP insecticides, its main mechanism of toxicity is the inhibition of acetylcholinesterase (AChE) leading to cholinergic syndrome. Since toxicity occurs at doses that do not inhibit AChE or long after its restoration, other mechanisms including the induction of oxidative stress have been widely implicated. The present study was aimed at evaluating the mitigating effect of vitamin C on CPF-induced hepatocellular injury in Wistar rats. Methods: Twenty adult male Wistar rats were divided into 4 groups of five animals in each group. The four groups were exposed by gavage to soya oil (2 ml/kg), vitamin C (100 mg/kg), CPF (10.6 mg/kg~1/8th LD50) and vitamin C (100 mg/kg) + CPF (10.6 mg/kg; 30 min later), respectively for 17 weeks. The sera obtained from blood samples collected from the animals were analysed for the levels of total proteins, albumin, aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), -glutamyl transferase (GGT) while globulin concentration and albumin/globulin ratio were calculated. The liver homogenate was evaluated for the levels of malonaldehyde (MDA), superoxide dismutase (SOD) and catalase (CAT), and histological changes. Results: The study showed that CPF altered the levels of the serum hepatic enzymes, hepatic MDA SOD and CAT, in addition to inducing hepatocellular degeneration. All these parameters were alleviated by pretreatment with vitamin C. Significance: CPF-induced hepatocellular injury which was partly due to oxidative changes was mitigated by vitamin C partly due to its antioxidative activity.
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    Sensorimotor changes following acute exposure to carbamazepine and phenytoin in male Wistar rats
    (Savannah Veterinary Journal, 2020-05-29) Akorede G.J; Ambali S.F; Abidoye K.A; Olatunji A.O; Aremu, A; Basiru A; Suleiman K.Y; Ahmed O.A; Abdulrahim H.A.
    Introduction: The use of antiepileptic drugs (AEDs) such as carbamazepine and phenytoin are part of strategies for the management of epilepsy. Acute exposure of epileptic patients to AEDs can cause sensory impairment. Aim: This study seeks to assess sensorimotor changes in male Wistar rats upon single-large dose exposure to carbamazepine, phenytoin and their mixture. Methods: 24 male Wistar rats (160-210 g) were randomly separated to four groups with 6 rats each. Groups I, II and III was given distilled water (2 ml/kg), carbamazepine (1950 mg/kg); and phenytoin (820 mg/kg) respectively, while Group IV (CBZ+PHY) was co-exposed to carbamazepine (1950 mg/kg) and phenytoin (820 mg/kg). The treatment was orally administered once by gavage (on Day(D) 1), then followed by weekly monitoring of body weight, clinical signs and neurobehavioural parameters for four weeks (D0, D1, D7, D14, D21 and D28). Results: The body weight revealed insignificant improvement (p > 0.05) in all groups. A significantly (p < 0.05) lower grooming frequency, increased locomotor activity and a reduction in the frequency of urination and defe- cation were recorded in the CBZ and PHY groups. Also, the number of missed rungs, inclined plane and grip fore- paw time reduced significantly (p < 0.05) in CBZ, PHY and CBZ+PHY groups. Significance: A single large dose of CBZ, PHY and their combination caused anxiogenic and sensorimotor im- pairment.