Exposure to Bisphenol A (BPA) worldwide is on the increase. Its toxicities in various tissues expressing estrogen receptors have been reported. However, limited information exists on its effects on the gastric tissue....Exposure to Bisphenol A (BPA) worldwide is on the increase. Its toxicities in various tissues expressing estrogen receptors have been reported. However, limited information exists on its effects on the gastric tissue. This study therefore investigated the gastric effects of BPA exposure and the likely ameliorative potential of genistein, a phytoestrogen antioxidant, known to interact with estrogen receptors. Eighty-four male Wistar rats were randomly divided into 6 groups (n = 14) and orally treated for 28 days. Group I-IV received distilled water (0.2 ml), corn oil (3 ml/kg), BPA (50 mg/kg) and genistein (50 mg/kg) respectively. Group V was pre-treated daily with BPA one hour prior to genistein administration while Group VI was pre-treated daily with genistein one hour prior to BPA treatment. Thereafter, blood was collected into heparinized bottles for hematological analysis. Gastric juice was collected for pH and electrolytes determination. Gastric tissue was excised and analyzed for superoxide dismutase (SOD), reduced glutathione (GSH), malondialdehyde, nitric oxide (NO), mucin, parietal and mucous cell counts, and histology. The BPA only treatment group exhibited significant increases (p < 0.05) in white blood cell count, neutrophil-lymphocyte ratio, mucin concentration, NO, and malondialdehyde while gastric juice pH, bicarbonate, SOD, and GSH levels were reduced compared to control. The gastric mucosa also showed pathologies consistent with inflammation. Genistein pre-and post-treatment in BPA exposed rats significantly (p < 0.05) ameliorated these effects of BPA. However, some signs of gastric inflammation were still evident in the mucosal samples. Bisphenol A induces gastro-toxicity by increasing gastric acidity, reducing gastric juice bicarbonate level and disrupting prooxidant/antioxidant balance. Genistein pre- and post-treatment ameliorated these gastro-toxic effects of Bisphenol A via gastroprotective, antioxidant and anti-inflammatory mechanisms.展开更多
Diabetes-induced dyslipidaemia has been associated with an increased risk of atherosclerosis and coronary heart diseases. Persea americana fruit has been reported to possess anti-diabetic properties. Therefore, this s...Diabetes-induced dyslipidaemia has been associated with an increased risk of atherosclerosis and coronary heart diseases. Persea americana fruit has been reported to possess anti-diabetic properties. Therefore, this study assessed the lipid profile and likely cardio-protective effects of hydroethanolic extracts of P. americana fruits in alloxan-induced diabetic Wistar rats. Thirty-five male rats (150 ± 30 g) were divided into 5 groups (n = 7) and treated orally as follows;groups I-II were normal animals treated with distilled water (0.3 ml/day) and P. americana (300 mg/kg) only respectively. Animals in groups III-V were made diabetic using alloxan monohydrate (100 mg/kg i.p.) and treated orally with distilled water (0.3 ml/day), P. americana (300 mg/kg) and glibenclamide (5 mg/kg) respectively for 21 days. Fasting blood glucose level was monitored prior to, after induction of diabetes mellitus, and on day 21 post-treatment, respectively. Thereafter, retro-orbital blood samples were collected after anaesthesia and analysed for insulin, total cholesterol (TC), triglyceride (TG), low density lipoprotein (LDL), high density lipoprotein (HDL) levels, apolipoproteins A1 and B, superoxide dismutase (SOD) and catalase activities, reduced glutathione (GSH), Vitamin C and malondialdehyde levels, respectively. VLDL, atherogenic index (AI) and ApoB/A1 ratio were estimated mathematically. Pancreatic and cardiac structures were also investigated using Haematoxylin and Eosin stains. Treatment with P. ameriacana extracts reduced (p P. americana treated diabetic group. The hydro-ethanol fruit extract of Persea americana attenuates diabetes induced dyslipidaemia and reduces the susceptibility to cardiac impairment in experimental diabetes mellitus.展开更多
文摘Exposure to Bisphenol A (BPA) worldwide is on the increase. Its toxicities in various tissues expressing estrogen receptors have been reported. However, limited information exists on its effects on the gastric tissue. This study therefore investigated the gastric effects of BPA exposure and the likely ameliorative potential of genistein, a phytoestrogen antioxidant, known to interact with estrogen receptors. Eighty-four male Wistar rats were randomly divided into 6 groups (n = 14) and orally treated for 28 days. Group I-IV received distilled water (0.2 ml), corn oil (3 ml/kg), BPA (50 mg/kg) and genistein (50 mg/kg) respectively. Group V was pre-treated daily with BPA one hour prior to genistein administration while Group VI was pre-treated daily with genistein one hour prior to BPA treatment. Thereafter, blood was collected into heparinized bottles for hematological analysis. Gastric juice was collected for pH and electrolytes determination. Gastric tissue was excised and analyzed for superoxide dismutase (SOD), reduced glutathione (GSH), malondialdehyde, nitric oxide (NO), mucin, parietal and mucous cell counts, and histology. The BPA only treatment group exhibited significant increases (p < 0.05) in white blood cell count, neutrophil-lymphocyte ratio, mucin concentration, NO, and malondialdehyde while gastric juice pH, bicarbonate, SOD, and GSH levels were reduced compared to control. The gastric mucosa also showed pathologies consistent with inflammation. Genistein pre-and post-treatment in BPA exposed rats significantly (p < 0.05) ameliorated these effects of BPA. However, some signs of gastric inflammation were still evident in the mucosal samples. Bisphenol A induces gastro-toxicity by increasing gastric acidity, reducing gastric juice bicarbonate level and disrupting prooxidant/antioxidant balance. Genistein pre- and post-treatment ameliorated these gastro-toxic effects of Bisphenol A via gastroprotective, antioxidant and anti-inflammatory mechanisms.
文摘Diabetes-induced dyslipidaemia has been associated with an increased risk of atherosclerosis and coronary heart diseases. Persea americana fruit has been reported to possess anti-diabetic properties. Therefore, this study assessed the lipid profile and likely cardio-protective effects of hydroethanolic extracts of P. americana fruits in alloxan-induced diabetic Wistar rats. Thirty-five male rats (150 ± 30 g) were divided into 5 groups (n = 7) and treated orally as follows;groups I-II were normal animals treated with distilled water (0.3 ml/day) and P. americana (300 mg/kg) only respectively. Animals in groups III-V were made diabetic using alloxan monohydrate (100 mg/kg i.p.) and treated orally with distilled water (0.3 ml/day), P. americana (300 mg/kg) and glibenclamide (5 mg/kg) respectively for 21 days. Fasting blood glucose level was monitored prior to, after induction of diabetes mellitus, and on day 21 post-treatment, respectively. Thereafter, retro-orbital blood samples were collected after anaesthesia and analysed for insulin, total cholesterol (TC), triglyceride (TG), low density lipoprotein (LDL), high density lipoprotein (HDL) levels, apolipoproteins A1 and B, superoxide dismutase (SOD) and catalase activities, reduced glutathione (GSH), Vitamin C and malondialdehyde levels, respectively. VLDL, atherogenic index (AI) and ApoB/A1 ratio were estimated mathematically. Pancreatic and cardiac structures were also investigated using Haematoxylin and Eosin stains. Treatment with P. ameriacana extracts reduced (p P. americana treated diabetic group. The hydro-ethanol fruit extract of Persea americana attenuates diabetes induced dyslipidaemia and reduces the susceptibility to cardiac impairment in experimental diabetes mellitus.
