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Ameliorative effects of probiotics in AlCl3-induced mouse model of Alzheimer's disease

机译：Ameliorative effects of probiotics in AlCl3-induced mouse model of Alzheimer's disease

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In recent years, gut microbiome alterations have been linked with complex underlying mechanisms of neurodegenerative disorders including Alzheimer's disease (AD). The gut microbiota modulates gut brain axis by facilitating development of hypothalamic-pituitary-adrenal axis and synthesis of neuromodulators. The study was designed to unravel the effect of combined consumption of probiotics; Lactobacillus rhamnosus GG (LGG & REG;) and Bifidobacterium BB-12 (BB-12 & REG;) (1 x 10(9) CFU) on AlCl3-induced AD mouse model in comparison with potent acetylcholine esterase inhibitor drug for AD, donepezil. Mice were randomly allocated to six different study groups (n = 8). Behavioral tests were conducted to assess effect of AlCl3 (300 mg/kg) and probiotics treatment on cognition and anxiety through Morris Water Maze (MWM), Novel Object Recognition (NOR), Elevated Plus Maze (EPM), and Y-maze. The results indicated that the combined probiotic treatment significantly (p < 0.0001) reduced anxiety-like behavior post AlCl3 exposure. The AlCl3 + LGG & REG; and BB-12 & REG;-treated group showed significantly improved spatial (p < 0.0001) and recognition memory (p < 0.0001) in comparison to AlCl3-treated group. The expression status of inflammatory cytokines (TNF-& alpha; and IL-1 & beta;) was also normalized upon treatment with LGG & REG; and BB-12 & REG; post AlCl3 exposure. Our findings indicated that the probiotics LGG & REG; and BB-12 & REG; have strong potential to overcome neuroinflammatory imbalance, cognitive deficits and anxiety-like behavior, therefore can be considered as a combination therapy for AD through modulation of gut brain axis.

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