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               ·160 ·                            南 京    医 科 大 学 学         报                        2025年2月


              A    nTPM                               RNA expression(tissue specificity)
                 500
                (nTPM)  400

                expression  300

                 200
                ANXA5  100

                  0                                                                              Skin
                                                                                       Smooth muscle
                                                                                                    Spleen
                          Choroid plexus
                                                                                      Heart muscle
                                   Retina
                                  Thyroid gland
                                       Pituitary gland
                                     Adrenal gland
                          Amygdala
                   Cerebellum
                                                                                           Adipose tissue
                          opocampal formation
                     Hypothalamus
                                                                     Seminal vesicle
                                                                Urinary bladder
                                                                             Fallopian tube
                                                                     Testis
                                                             Liver
                                              Esophagus
                                             Lung
                                                    Small intestine
                                                   Duodenum
                Cerbral cortex Basal ganglia Midbrain  Spinal cord Parathyroid gland  Salivary gland  Tongue Stomach  Colon Rectum Gallbladder Pancreas Kidney  Epididymis  Prostate Vagina Ovary Endometrium Cervix Placenta Breast Skeletal muscle  Appendix Lymph node Bone marrow Thymus
                                                                                                       Tonsil
              B                                                D
                  800               TCGA dataset                           Patiens with high protein expression of ANXA5
                 (FPKM)  700                                      100
                  600
                                                                   80
                 expression  500                                 (%)  Patients  60
                  400
                                                                   40
                  300
                 ANXA5  200                                        20 0
                  100
                                                                    Melanoma
                                                                                                 Breast cancer
                                                                                         Stomach cancer
                                                                                             Carcinoid
                                                                         Endometrial cancer
                                                                             Head and neck cancer
                                                                        Glioma
                                                                                                    Ovarian cancer
                                                                                      Lymphoma
                    0                                           Prostate cancer Thyroid cancer  Renal cancer Testis cancer Lung cancer Urothelial cancer Liver cancer Skin cancer
                                       Prostate cancer
                   Thyroid cancer  Stomach cancer  Renal cancer  Testis cancer  Ovarian cancer  Pancreatic cancer
                                                        Melanoma
                                Liver cancer
                                    Urothelial cancer
                      Head and neck cancer
                      Lung cancer
                                               Endometrial cancer
                                              Cervical cancer
                      Colorectal cancer
                    Glioma
                                             Breast cancer
                               Pancreatic cancer
              C          SKCM           E                                           F
                                              Nevus   Primary melanoma  Metastatic melanoma
                  12       *                                                          15           **
                 (TPM+1)  10                                                         IHC Score  10
                 expression log2  8  Tumor         500 μm                              5 0
                                                                                          Nevus
                                                                                                 Primary Metastatic
                 ANXA5  6  (n=461)                                                        (n=5) (n=6) (n=6)
                           Normal
                          (n=558)
                 A:ANXA5 RNA expression in human tissues from the HPA database. B:ANXA5 mRNA expression in tumors from the TCGA database. C:The analysis
              of ANXA5 mRNA expression in SKCM tumor tissues and adjacent normal tissues from GEPIA2 database. D:High protein levels of ANXA5 in patients
              with tumor from the HPA database. E,F:Immunohistochemistry staining of human melanoma tissues,including nevus,primary melanoma,and metastatic
                                   **
              melanoma(scale bars=500 μm). P < 0.01.
                                       图1  ANXA5在黑色素瘤中高表达并与黑色素瘤发展正相关
                     Figure 1  ANXA5 was highly expressed in melanoma and positively correlated with melanoma development
              亡诱导剂RSL3的剂量增加,ANXA5⁃KO组细胞上清                       铁死亡是铁离子依赖性的细胞死亡形式,铁蓄积是
              液LDH水平显著增加(图2B,P < 0.05),提示细胞膜                    铁死亡的标志之一。当借助FerroOrange(Fe 荧光探
                                                                                                       2+
              破损程度加重;CCK⁃8 检测显示细胞活力明显下降                         针)进行荧光成像观察时,相比WT细胞,在RSL3或
             (图2C,P < 0.05),可见ANXA5⁃KO细胞表现出对铁                   Erastin诱导下ANXA5⁃KO细胞中铁离子蓄积更为明
              死亡诱导剂RSL3的易感性,细胞死亡效应增强。采                          显(图2E、F,P < 0.01)。而亚铁离子增加会通过芬顿
              用另一种铁死亡诱导剂Erastin处理,类似地,ANXA5⁃                    反应产生大量羟自由基,引起细胞内抗氧化系统失衡,
              KO 细胞表现出更低的细胞活力(图 2D,P < 0.05)。                   于是进一步对细胞内氧化还原状态进行检测,结果
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