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               ·1770 ·                           南 京    医 科 大 学 学         报                        2025年12月


              2.3  数据库分析发现 AKAP12 在乳腺癌组织中低                      类型,通过 UALCAN 数据库分析发现 AKAP12 在乳
              表达                                                腺癌各亚型中的蛋白表达情况:正常乳腺组织>
                  经 UALCAN 数 据 库(https://ualcan.path.uab.       Luminal 型乳腺癌>HER2 阳性乳腺癌>TNBC(P <
              edu)分析发现AKAP12在乳腺癌、结肠癌、卵巢癌和                       0.05,图 2C)。以上结果提示,AKAP12 高表达在乳
              透明细胞肾细胞癌中呈低表达,而在子宫内膜癌                             腺癌中可能是一种保护性因素,而 AKAP12 的表达
             (uterine confined endometrial cancer,UCEC)中呈高      下调可能与乳腺癌患者的预后不良相关。
              表达(P < 0.05,图 2B);在乳腺癌中,按分子分型分                    2.4  RBM7对AKAP12 RNA和蛋白表达的影响

              为 Luminal 型 、人 类 表 皮 生 长 因 子 受 体(human                 qRT⁃PCR和Western blot结果显示,人源性乳腺
              epidermal growth factor receptor 2,HER2)阳性和三      癌细胞MDA⁃MB⁃231中过表达RBM7后,AKAP12的
              阴性乳腺癌(triple⁃negative breast cancer,TNBC)3种       RNA和蛋白表达水平明显降低,差异有统计学意义



                             A
                                                          Enrichment plot:
                                                  GO_CELL_CYCLE_PHASE_TRANSITION
                                  (ES)  0.40
                                   0.35
                                   0.30
                                  Enrichment score  0.20
                                   0.25
                                   0.15
                                   0.10
                                   0.05
                                   0.00
                                  (Signal2Noise)  2.5  ‘R7_7O’(positively correlated)





                                  Ranked list metric  -2.5  0  500  1 000  1 500  2 000  ‘R7_7V5’(negatively correlated)  4 500
                                                             Zero cross at 2352
                                    0.0

                                                                   2 500
                                                                               3 500
                                                                         3 000
                                                                                     4 000
                                                            Hits
                                            Enrichment profile  Rank in ordered dataset
                                                                    Ranking metric scores
                     B        Expression of AKAP12 across cancers:  C
                               (with tumor and normal samples)           Protein expression of AKAP12 in breast cancers
                          6                                             3
                              Tumor  Normal          *
                                                                                    *
                                                                        2
                          4       *             *
                                       *     *                          1                  *      *
                         Z⁃value  *                                   Z⁃value  0
                          2
                          0
                                                                       -1
                          -2
                                                                       -2
                          -4                                           -3
                            Breast Colon Ovarian Clear UCEC Lung           Normal  Luminal  HER2  TNBC
                            cancer cancer cancer cell  cancer             (n=18) (n=18) positive (n=16)
                                           RCC                                          (n=18)
                 A:The main pathway regulated by RBM7 was identified through RNA⁃sequence. B:The expression of AKAP12 in various cancers from UALCAN
              database was investigated. breast cancer:normal(n=18),primary tumor(n=125);colon cancer:normal(n=100),primary tumor(n=97);ovarian cancer:
              normal(n=25),primary tumor(n=100);clear cell renal cell carcinoma(RCC):normal(n=84),primary tumor(n=110);uterine confined endometrial
              cancer(UCEC):normal(n=31),primary tumor(n=100);lung cancer:normal(n=111),primary tumor(n=111). C:The expression of AKAP12 in breast
                                                                   *
              cancer from UALCAN database was investigated. Compared with the Normal group,P < 0.05.
                                   图2 RBM7的主要富集通路及AKAP12在人癌组织中的蛋白表达情况
                         Figure 2  The main pathway regulated by RBM7 and the protein expression of AKAP12 in cancers
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