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                                                             LTA
                                                           罗伊乳杆菌         Mub           黏液层
                                         丁酸                                ○
                                                                            -
                                                IAId、ILA       R-spondins
                                         Akt                                Notch
                                                                           +
                                       claudin-1  AhR     Wnt/β-catenin   ○
                                       occludin


                                                          IL-22              Paneth、杯状细胞
                                       PPARS
                                             TLR4
                                                                              AMPS、Muc-2
                                         NF-κB                                β- 防御素、Lyzl
                                                   +
                                                CD 4 T
                                  GPR109A
                                       免疫细胞     编码
                                                                                       黏膜固有层
                          IL-6、IL-1β              免疫调节性    Lgr5+ 细胞      B 细胞
                         IL-12、TNF-α                T 细胞                        sIgA
                          IFN-γ、IL-8
                                      IL-10、TGF-β
                                         IL-18
              注:LTA= 脂磷壁酸,Mub= 黏液结合蛋白,Akt= 蛋白激酶 B,NF-κB= 核转录因子 κB,Lyz1= 溶菌酶 1,GPR109A=G 蛋白偶联受体
           109A,sIgA= 分泌型免疫球蛋白 A,AhR= 芳烃受体,IAld= 吲哚 -3- 醛,Paneth= 潘氏细胞,AMPs= 抗菌肽,ILA= 吲哚 -3- 乳酸,TLR4=Toll 样
           受体 4,PPARs= 过氧化物酶体增殖物激活受体,IL-1β= 白介素 1β,IL-6= 白介素 6,IL-8= 白介素 8,IL-10= 白介素 10,IL-12= 白介素 12,
           IL-18= 白介素 18,IL-22= 白介素 22,TNF-α= 肿瘤坏死因子 α,IFN-γ= 干扰素 γ,TGF-β= 转化生长因子 β,Muc-2= 黏蛋白 2
                                                 图 1 L.reuteri 对肠屏障作用机制图
                                    Figure 1 The mechanism of action of Lactobacillus reuteri on intestinal barrier
                                                                   Interactions between host genetics and gut microbiota determine
            本文文献检索策略:
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