This work aimed to evaluate the antidotal role of allicin and/or betaine versus experimental Cd toxicity in terms of restoring Cd‐provoked changes in the circulating oxidative biomarkers together with biochemical indices of tissue abnormalities in common carp. 150 healthy common carp were subdivided into five equal groups. Group 1 fish (control) was reared in normal freshwater. Fish in other groups were exposed to 5 mg/L cadmium chloride in water for 15 days. Group 3 fish received diet supplemented with betaine (30 mg/kg BW); Group 4 fish received diet supplemented with allicin (15 mg/kg BW) and in group 5, fish food was supplemented with both betaine and allicin. Cd exposure caused significant decline in circulating SOD, catalase, GSH and FRAP as well as a rise in MDA values. Plasma levels of ALT, GGT, ALP, glucose, urea and creatinine also showed significant increase in fish treated with cadmium compared with controls. However, allicin and/or betaine supplementation had been somewhat fortunate in recovering Cd‐provoked shifts in the circulating oxidative biomarkers and biochemical indicators of tissue abnormalities in common carp which may be relevant to antioxidant properties of these compounds as well as metal‐chelating and methyl‐donating abilities of allicin and betaine respectively. Moreover, combination of allicin and betaine stands outs as the most effective approach upon Cd poisoning. However, explanation of the precise molecular mechanisms of their modulating effects against Cd poisoning as well as their optimal dosage in various exposure durations and toxicant concentrations requires further study.
This study aimed to evaluate the effects of Mentha piperita methanolic extract (MPE) on Cyprinus carpio intestinal microbiota, including total microorganisms gram-negative bacteria, lactic acid bacteria, and fungi count. Liver and intestinal histopathology, and the activity of liver enzymes, were also used to evaluate the possible side effects of MPE. A total of 96 healthy C. carpio fries (76.76±20.26 g) were allocated to four treatment groups with three replications in a completely randomized design. The fries were fed with diets containing 0, 0.5, 1, and 2% extract for 56 days at the rate of 2% of body weight during the experiment. Results showed a significant decrease in total microorganisms, enteric gram-negative bacteria, and total fungi counts (P<0.05). The total lactic acid bacteria count in 0.5% treatment was significantly lower than in control and 2% treated fish (P<0.05). MPE did not affect AST, leading to a significant increase in ALT levels. Simultaneously, ALP represented significantly higher activity in the control group (P>0.05). Microscopic findings revealed marked lesions, including congestion and cell degeneration in the livers of the three groups of fish fed with the extract. The intestinal folds were shortened and blunted in the treatment groups. Furthermore, the intestinal mucosa was necrotic, and the lamina propria was significantly thickened with mononuclear inflammatory cells (P<0.05). Although MPE significantly affects intestinal microbiota, its consumption at 2% is not recommended for C. carpio due to the lesions made in the liver and intestine.
This study was aimed to evaluate the effects of Mentha piperita methanolic extract (MPE) on Cyprinus carpio intestinal microbiota, including total microorganisms gram-negative bacteria, lactic acid bacteria, and fungi count. Liver and intestinal histopathology, and the activity of liver enzymes, were also used to evaluate the possible side effects of MPE. A total of 96 healthy C. carpio fries (76.76 ± 20.26 g) were allocated to four treatment groups with three replications in a completely randomized design. The fries were fed with diets containing 0, 0.5, 1, and 2% extract for 40 days at the rate of 2% of body weight during the experiment. Results showed a significant decrease in total microorganisms, enteric gram-negative bacteria, and total fungi counts (p < 0.05). The total lactic acid bacteria count in 0.5% treatment was significantly lower than in the control and 2% treated fish (p < 0.05). MPE did not affect AST, while it led to a significant increase in ALT level. Simultaneously, ALP represented significantly higher activity in the control group (p > 0.05). Microscopic findings revealed marked lesions including congestion and cell degeneration in the livers of the three group of fish fed with the extract. The intestinal folds were shortened and blunted in the treatment groups. Furthermore, the intestinal mucosa was necrotic, and the lamina propria was significantly thickened with mononuclear inflammatoryc cells (p < 0.05). Although MPE significantly affected intestinal microbiota, its consumption at 2% is not recommended for C. carpio due to the lesions made in the liver and intestine.
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