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第45卷第8期      郭 爽,倪    曼,程 丽,等. 烟酸通过SIRT3/SOD2通路改善老龄小鼠体外成熟的卵母细胞质量[J].
                  2025年8月                  南京医科大学学报(自然科学版),2025,45(8):1101-1109,1177                    ·1105 ·


                   A                                                                B
                              Young              Old              Old+NA
                                                                                        100     ***
                                                                                                     *
                                                                                         80
                                                                                        (%)  60
                      MⅡ                                                                PBE  40

                                                                                         20
                                                                                          0
                                                                                             Young  Old Old+NA
                    C           Young             Old              Old+NA         D
                                                                                          8     ***
                                                                                       Fluorescence intensity  2 CG signals
                                                                                         (AU)

                        CG                                                                6 4        *


                                                                                         of
                                                                                          0
                                                                                             Young  Old Old+NA

                    C                                                              E     60
                                                                                                ***  **
                        DAPI                                                            (%)  40
                                                                                      Mos⁃location of CG  percentage  20





                                                                                          0
                                                                                             Young  Old Old+NA
                        Merge






                   A:Representative images of the MⅡ⁃stage oocytes(Scale bars=200 μm). B:The percent of PBE in the young,old,and old+NA groups(n=20). C:
                Representative figures of CG distribution in the young,old,and old+NA groups(Scale bars=25 μm). D:The statistical analysis of CG signals(n=15). E:
                                                                         *     **        ***
                The statistical analysis of the percentage of mislocalized CG in MⅡ⁃stage oocytes(n=15). P < 0.05,P < 0.01 and  P < 0.001.
                                                    图2 卵母细胞PBE和CG分布
                                          Figure 2 PBE and CG distribution in MⅡ⁃stage oocytes



                A                                                 B                     C
                       Young            Old            Old+NA
                                                                     (%)  40  ***  *          40     ***  *
                                                                     Percentage of aberrant spindle  30 0  Percentage of misaligned  (%) chromosome  30 0



                                                                                              20
                                                                      20
                                                                      10
                                                                                              10

                                                                                                       Old Old+NA
                                                                                                 Young
                                                                         Young
                                                                               Old Old+NA
                   A:Representative images of the spindle morphology and chromosome alignment in MⅡ⁃stage oocytes(Scale bars=25 μm). B:The rate of abnormal
                                                         *
                spindles(n=30). C:The rate of misaligned chromosomes(n=30). P < 0.05 and  *** P < 0.001.
                                              图3 MⅡ期卵母细胞纺锤体组装和染色体排列
                                   Figure 3  Spindle assembly and chromosome alignment in MⅡ⁃stage oocytes
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