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Yang, Xizi; He, Ziyu; Hu, Ruizhi; Yan, Jiahao; Zhang, Qianjin; Li, Baizhen; Yuan, Xupeng; Zhang, Hongfu; He, Jianhua; Wu, Shusong
Frontiers in immunology, 11/2021, Letnik: 12Journal Article
As the precursor of vitamin A, β-carotene has a positive effect on reproductive performance. Our previous study has shown that β-carotene can increase antioxidant enzyme activity potentially through regulating gut microbiota in pregnant sows. This study aimed to clarify the effect of β-carotene on reproductive performance and postpartum uterine recovery from the aspect of inflammation and gut microbiota by using a mouse model. Twenty-seven 6 weeks old female Kunming mice were randomly assigned into 3 groups (n=9), and fed with a diet containing 0, 30 or 90 mg/kg β-carotene, respectively. The results showed that dietary supplementation of β-carotene reduced postpartum uterine hyperemia and uterine mass index ( <0.05), improved intestinal villus height and villus height to crypt depth ratio, decreased serum TNF-α and IL-4 concentration ( <0.05), while no differences were observed in litter size and litter weight among three treatments. Characterization of gut microbiota revealed that β-carotene up-regulated the relative abundance of genera , and , but down-regulated the relative abundance of and . Correlation analysis revealed that was negatively correlated with the IL-4 concentration, while and had a negative linear correlation with both TNF-α and IL-4 concentration. On the other hand, was positively correlated with the TNF-α, and had a positive correlation with both TNF-α and IL-4 concentration. These data demonstrated that dietary supplementation of β-carotene contributes to postpartum uterine recovery by decreasing postpartum uterine hemorrhage and inhibiting the production of inflammatory cytokines potentially through modulating gut microbiota.
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