Page 97 - 《中国药科大学学报》2025年第4期
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第  56 卷第  4 期      李莹莹,等:丙酸钠缓解鼠柠檬酸杆菌诱导的小鼠结肠炎效果优于混合短链脂肪酸                                    493
                   A                                                   12     PBS;

                                                                              Pro;
                                                                              SCFAs
                                                                                                 #
                                                                      Colon length/cm  4
                                                                        8
                                                                                             **




                           Cont   Pro  SCFAs  C.r. C.r.+Pro C.r.+SCFAs  0                        C.r.



                   B                                                            Cont
                                                                       12



                                                                      Histology score       ***
                                    200 nm                200 nm        8            ***    $$     ***
                                                                                            ##
                           Cont (200×)           C.r. (200×)            4





                                                                        0
                                                                             Cont    C.r.
                                    200 nm                200 nm                          C.r.+Pro  C.r.+SCFAs
                          C.r.+Pro (200×)      C.r.+SCFAs (200×)

                     C   8    PBS;                                  D   3     PBS;
                              Pro;                                            Pro;
                              SCFAs          ***                              SCFAs         ***
                         6                                                                       ##  ***
                                                                                                      #
                        TNF-α mRNA  4             ##  **               IL-6 mRNA 2               **
                                                      #
                                                  **

                         2                                              1

                         0                                              0
                                 Cont            C.r.                           Cont             C.r.

               Figure 3    Sodium propionate significantly reduced colonic inflammation compared with mixed SCFAs ( x±SE, n=4-6)
               A: Changes in colon length were detected after the intervention of sodium propionate and SCFAs for 2 weeks, ** P<0.01 vs Cont + PBS;  #
               P<0.05 vs C.r. + PBS; B: HE staining and histopathological score of colon (scoring criteria: the first part of 0-4 points, according to the
               number of inflammatory cells in the colon and the degree of infiltration; the second part of 0-4 points, according to the degree of crypt
                                                                                                     ##
                                                                               [10]
               hyperplasia and mucosal damage. The total score was the sum of the scores from both parts  ) *** P<0.001 vs Cont group;   P<0.01 vs
                       $$
               C.r. group;   P<0.01 vs SCFAs group; C-D: Detection of inflammatory factors (TNF-α, IL-6) levels in colon tissue, ** P<0.01, *** P<0.001
                          #
                                ##
               vs Cont group;   P<0.05,   P<0.01 vs C.r.group
               答的关键细胞,在抗原刺激下可被激活并分化为不                           组 的  Th17 和  Treg 免 疫 反 应 也 高 于    C.r.+SCFAs
               同亚型,包括      1 型  T  辅助细胞(Th1)、2 型    T  辅助细      组(图   5-C,5-D)。这表明丙酸钠显著上调了肠道免
               胞(Th2)、T    辅助细胞     17(Th17)、调节性      T  细胞     疫反应,且作用效果优于混合             SCFAs。

               (Treg)。对这些免疫细胞分型进行了检测,结果显
                                                                4    讨 论
               示  C.r.主要引起     Th1 和  Th17 免疫反应增强,Treg
               免疫反应抑制。C.r.+Pro 组的         Th1、Th17 和  Treg 免         前期的研究发现,透明质酸减轻               C.r.感染可能
                                                                                                [10]
               疫反应高于      C.r.组(图  5-A, 5-C,5-D),同时  C.r.+Pro   与丙酸有关,但具体机制尚不清楚 。C.r.可诱导
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