India
The gut-brain axis directly regulates the brain homeostatic environment; an imbalance in gut microbial composition following ethanol exposure is maleficent. In this context, involvement of probiotics as prophylactic intervention against ethanol-induced neurotoxicity is elusive in the literature. Therefore, the present study was aimed to determine the impact of chronic ethanol exposure on the neurobehavioral response of zebrafish and possible neuroprotection through co-supplementation of probiotic Lactobacillus rhamnosus GG (LGG). Zebrafish were divided into naive, control, ethanol (0.01% v/v), LGG, and ethanol co-supplemented with LGG groups. Neurobehavioral assessment was performed after 7 days of chronic waterborne exposure to ethanol with LGG co-supplementation followed by histopathological studies. The findings indicated that there was a clear alteration in locomotor activity and habitat preference, with animals preferentially migrating toward altered zones on exposure to ethanol. However, co-supplementation of LGG showed restoration against ethanol-induced neurobehavioral and cognitive dysfunction. Brain tissue pyknosis and intestinal epithelial disruption were significantly mitigated on LGG co-supplementation against ethanol in zebrafish. The present study provides a novel approach toward supplementation of probiotics such as LGG in modulation of gut commensal microbiota influencing zebrafish behavior. Moreover, the findings delineate the possible role of probiotics as a curative administration to counter ethanol-persuaded neurological outcomes.
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