title: Expression of Annexin A2 and Its Correlation With Drug Resistance and Recurrence of Bladder Cancer.
abstract: To explore the expressions of annexin A2 in bladder cancer cell lines and bladder cancer tissues, we want to find the relationship among annexin A2, drug resistance, and recurrence of bladder cancer.
  
  
  
  Our laboratory established the PUMC-91 bladder cancer cell line against gradient concentration of Adriamycin (0.3, 0.6, and 1.0 μg/mL), and we also collected 60 cases of surgically resected bladder cancer recurrent tissue samples. The tissues were classified into 2 groups according to the frequency of recurrence (<6 months and >2 years) after initial surgery. The method of immunohistochemistry was used to examine the differences in the expression of annexin A2.
  
  
  
  There were statistical differences in annexin A2 among normal bladder epithelial cell line SV-HUC-1, PUMC-91, PUMC-91 against 0.3 μg/mL Adriamycin, and PUMC-91 against 1.0 μg/mL Adriamycin (P < .05). The expressions of Annexin A2 were found to be higher than those that recurred at >2 years (P = .002) in the bladder cancer tissues and that recurred at <6 months after initial surgery. It was also associated with invasion depth (stage) of bladder cancer, such as higher expression in T2 (invasive muscular) group than Tis (carcinoma in situ) and T1 (invasive mucosa lamina propria) groups (P = .003 and P = .000, respectively). But, it did not correlate with the differentiation (grade) of cancer cells in bladder cancer tissues (P = .593).
  
  
  
  Annexin A2 can act as a valuable biomarker for predicting the drug resistance and recurrence of bladder cancer.
authors.affiliation: Department of Clinical Laboratory, Beijing Shijitan Hospital, Capital Medical University, Beijing Key Laboratory of Urinary Cellular Molecular Diagnostics, Beijing, China.
authors.forename: Huihui
authors.initials: H
authors.lastname: Hu
authors.affiliation: Department of Clinical Laboratory, Beijing Shijitan Hospital, Capital Medical University, Beijing Key Laboratory of Urinary Cellular Molecular Diagnostics, Beijing, China.
authors.forename: Jin
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Department of Clinical Laboratory, Beijing Shijitan Hospital, Capital Medical University, Beijing Key Laboratory of Urinary Cellular Molecular Diagnostics, Beijing, China mzhang99@aliyun.com.
authors.forename: Man
authors.initials: M
authors.lastname: Zhang
mesh_terms: D000368:Aged; D017306:Annexin A2 / Q000235:genetics*; D045744:Cell Line, Tumor; D004317:Doxorubicin / Q000627:therapeutic use; D019008:Drug Resistance, Neoplasm / Q000235:genetics*; D005260:Female; D015972:Gene Expression Regulation, Neoplastic / Q000235:genetics; D006801:Humans; D007150:Immunohistochemistry / Q000379:methods; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000235:genetics*; D001749:Urinary Bladder Neoplasms / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology*
chemical_list: D017306:Annexin A2; D004317:Doxorubicin
keywords: annexin A2; bladder cancer; drug resistance; immunohistochemistry; recurrence