Page 51 - 《南京医科大学学报》自然科学版2026年第2期
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第46卷第2期         汤莉巧,段程伟,陈伟观,等. 下调Dixdc1表达抑制创伤性脑损伤后星形胶质细胞极化[J].
                  2026年2月                     南京医科大学学报(自然科学版),2026,46(2):202-212                        ·207 ·


                 A              (×200)             (×400)         C              (×200)              (×400)

                                        Lesion core                                       Lesion core

                     Sham                                             Iba1





                                        Lesion core
                                                                                          Lesion core

                     3 h                                              NenN
                     TBI




                  (Unit)  200     Dixdc1  (Unit)  250     Dixdc1   (Unit)  250     Iba1    (Unit)  200     NeuN
                B           Sham                    TBI 3 h     D
                  intensity  150  GFAP    intensity  200  GFAP     intensity  200  Dixdc1  intensity  150  Dixdc1
                                           150
                                                                   150
                   100
                                                                                            100
                                                                   100
                                           100
                  Fluorescent  50 0       Fluorescent  50 0        Fluorescent  50 0       Fluorescent  50 0
                                                                                                    40
                                                                                                           80 100
                                                                                                        60
                          200
                                400
                      0
                                                                           Distance(μm)
                                                  Distance(μm)
                         Distance(μm)  600    0  100  200  300  400   0  50 100 150 200 250   0  20  Distance(μm)
                   A,B:Immunofluorescence staining of Dixdc1(green)and GFAP(red)within the ipsilateral cerebral cortex in sham group or TBI 3 h group. C,D:
                Immunofluorescence staining of Dixdc1(red)and Iba1/NeuN(green)within the ipsilateral cerebral cortex in sham group or TBI 3 h group. The lesion
                core region was delineated using a white dashed line and annotated as“Lesion core”.
                                              图2 Dixdc1蛋白与星形胶质细胞存在共定位
                                            Figure 2 Dixdc1 protein co⁃localizes with astrocytes
                                              A                    LPS
                                                         0 h  4 h  8 h  12 h 24 h
                                                   Dixdc1                    77 kDa
                                                   GFAP                      50 kDa
                                                   PCNA                      36 kDa

                                                 α⁃Tubulin                   55 kDa
                   B                              C               *               D          *
                      3.0        ***                  2.5                             2.2
                                                                **                    2.1
                     Dixdc1/α⁃Tubulin  2.0  *        GFAP/α⁃Tubulin  1.5             PCNA/α⁃Tubulin  2.0
                                ***
                                                      2.0
                                                              **
                                                                                      1.9
                                                      1.0
                      1.0
                                                                                      1.7
                       0                              0.5 0                           1.8
                          0 h  4 h  8 h 12 h 24 h         0 h  4 h  8 h 12 h 24 h         0 h  4 h  8 h 12 h 24 h
                                    LPS                             LPS                             LPS
                   A:Western blot detection of protein levels of Dixdc1,GFAP and PCNA in an activated astrocyte model. B-D:Quantitative analysis of Dixdc1(B),
                                             *
                                                    **
                GAFP(C)and PCNA(D)protein expressions. P < 0.05,P < 0.01,and  *** P < 0.001(n=3).
                                           图3   LPS刺激促进星形胶质细胞中Dixdc1蛋白表达
                                   Figure 3  LPS stimulation promotes Dixdc1 protein expression in astrocytes
                后 E⁃Cadherin、N⁃Cadherin、Vimentin、PCNA 的蛋白         制星形胶质细胞增殖迁移能力。
                表达较PBS处理组增加,Dixdc1⁃sh组Dixdc1敲低抑                   2.5 敲低Dixdc1抑制LPS诱导的星形胶质细胞周期
                制 LPS 的诱导作用(图 4E~J)。提示 Dixdc1 敲低抑                     细胞周期是检测细胞增殖的重要检测指标                    [18] ,
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