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               ·1308 ·                           南 京    医 科 大 学 学         报                        2021年9月


              A                                                                     B
                       PI⁃灭活菌          AO⁃细胞核            Merge                                      *
                                                                                       胞内相对细菌荧光强度 1.5
                  μg/mL                                                                1.0     *  *

                  0                                                                    0.5



                                                                                       0.0   0   40   80  120
                  40 μg/mL                                                                    Pec1浓度(μg/mL)







                  80 μg/mL







                  μg/mL

                  120



                 A:荧光显微镜观察吞入胞内的灭活PAO1菌(×400)。PI(红)染灭活的PAO1,AO(绿)染细胞核,白色箭头指示灭活的PAO1;B:MH⁃S细胞
              吞噬灭活PAO1菌相对荧光强度定量图。两组比较,P < 0.001(n=3)。
                                                 *
                                      图5 Pec1对MH⁃S细胞吞噬灭活铜绿假单胞菌PAO1的影响
              Figure 5  Effect of the recombinant protein Pec1 on phagocytosis of heat⁃inactivated Pseudomonas aeruginosa PAO1 by MH
                      ⁃S cells


              上述研究结果表明,巨噬细胞可通过促进或抑制自                            [4] ZHU F,XIONG F,HE J,et al. Brd4 inhibition amelio⁃
              噬,继而影响吞噬功能,最终影响胞内PA的清除。                                rates pyocyanin ⁃ mediated macrophage dysfunction via
                  本研究初步观察到PA分泌的Pec1蛋白能够抑                             transcriptional repression of reactive oxygen and nitrogen
                                                                     free radical pathways[J]. Cell Death Dis,2020,11(6):
              制MH⁃S巨噬细胞对灭活PA的吞噬,该分泌蛋白影
                                                                     459
              响吞噬的具体机制,是否对巨噬细胞自噬产生影响
                                                                [5] JAIN N,MOELLER J,VOGEL V. Mechanobiology of mac⁃
              尚待进一步深入研究。                                             rophages:how physical factors coregulate macrophage

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