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Banana, orange, and apple are the major fruits in Western and Asian diets. In order to find the effects of these fruits, neuron like PC12 cells were exposed to the extracts of these fruits before H 2 O 2 treatment. We found a significant viability of PC12 cells by the MTT reduction test, which indicated that the phenolics of banana, orange, and apple fruits prevented oxidative stress-induced neurotoxicity. Additional tests by lactate dehydrogenase and trypan blue exclusion assays showed that the extracts reduced oxidative stress-induced neuronal cell membrane damage. These results suggest that fresh apples, banana, and orange in our daily diet along with other fruits may protect neuron cells against oxidative stress-induced neurotoxicity and may play an important role in reducing the risk of neurodegenerative disorders such as Alzheimer's disease.

Our results suggest that fermented mulberry leaf extract (ME) may provide synergistic therapeutic benefits of both probiotics and natural plant extracts in prevention of 5-fluorouracil-induced mucositis. These impacts are particularly significant given the induction of MUC2 and MUC5AC gene expressions for production of mucins and the reduction of pro-inflammatory cytokine interleukin-1β in gut environments. Therefore, we proposed that enhanced functionality of ME by fermentation of Lactobacillus acidophilus A4 can be applied as food-grade adjuncts for mucositis therapy and prevention in food industry.

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