| 1 | Crucial role of histone deacetylase SIRT1 in myeloid-derived suppressor cell-mediated reprogramming of CD4^(+) T-cell differentiation显示文摘Myeloid-derived suppressor cells(MDSCs)are heterogeneous,immature myeloid cells that inhibit the immune responses of T cells.1–5 MDSCs play a crucial role in infection,6,7 transplantation,8,9 autoimmune diseases10,11,and tumors12,13 by driving the differentiation of specific T-cell subsets,but the precise regulatory mechanism is still unclear.Recently,our results showed that SIRT1,a histone deacetylase,suppresses the functions of proinflammatory MDSCs and promotes tumor growth.14 However,it remains unclear whether SIRT1 regulates the MDSC-induced differentiation of T cells.Here,we identified the regulatory effects of SIRT1 in CD11b+Gr1+MDSCs on T-cell differentiation. | Lin Dong Yujing Bi Anna Jia Qing Yu Yuexin Wang Yufei Wang Qiuli Yang Yejin Cao Ying He Ruichen Liu Yan Li Guangwei Liu | 2020 | Cellular & Molecular Immunology2020，17，7： | 0 |
| 2 | Dietary supplemental coated essential oils and organic acids mixture improves growth performance and gut health along with reduces Salmonella load of broiler chickens infected with Salmonella Enteritidis显示文摘Background Reducing Salmonella infection in broiler chickens by using effective and safe alternatives to antibiotics is vital to provide safer poultry meat and minimize the emergence of drug-resistant Salmonella and the spread of salmonellosis to humans.This study was to first evaluate the protective efficacy of feeding coated essential oils and organic acids mixture(EOA)on broiler chickens infected with Salmonella Enteritidis(S.Enteritidis,SE),and then its action mechanism was further explored.Methods A total of 4801-day-old Arbor Acres male chickens were randomly assigned into five treatments with six replicates,including non-challenged control fed with basal diet(A),SE-challenged control(B),and SE-infected birds fed a basal diet with 300 mg/kg of EOA(BL),500 mg/kg of EOA(BM)and 800 mg/kg of EOA(BH),respectively.All birds on challenged groups were infected with Salmonella Enteritidis on d 13.Results Feeding EOA showed a reversed ability on negative effects caused by SE infection,as evidenced by decreasing the feed conversion rate(FCR)and the ratio of villus height to crypt depth(VH/CD)(P<0.05),obviously decreasing intestinal and internal organs Salmonella load along with increasing cecal butyric acid-producing bacteria abundance(P<0.05).Moreover,supplemental different levels of EOA notably up-regulated claudin-1(CLDN-1),occludin(OCLN),zonula occludens-1(ZO-1),mucin-2(MUC-2),fatty acid binding protein-2(FABP-2),nuclear factor kappa-light-chainenhancer of activated B cells(NF-κB),myeloid differential protein-88(MyD88)and interleukin-6(IL-6)mRNA levels in the ileum of the infected chickens after challenge,whereas down-regulated toll-like receptor-4(TLR-4)mRNA levels(P<0.05).Linear discriminant analysis combined effect size measurements analysis(LEfSe)showed that the relative abundance of g_Butyricicoccus,g_Anaerotruncus and g_unclassified_f_Bacillaceae significantly was enriched in infected birds given EOA.Also,phylogenetic investigation of communities by reconstruction of unobserved states(PICRUSt)analysis showed that alpha-linolenic acid metabolism,fatty acid metabolism and biosynthesis of unsaturated fatty acids were significantly enriched in the EOA group.Conclusion Our data suggest that the essential oils and organic acids mixture can be used as an effective strategy to ameliorate and alleviate Salmonella Enteritidis infection in broilers. | Zeqiong Hu Lin Liu Fangshen Guo Jia Huang Jianing Qiao Ruichen Bi Jinyu Huang Kaichen Zhang Yuming Guo Zhong Wang | 2023 | Journal of Animal Science and Biotechnology2023，14，6： | 0 |
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