title: [The significance of the expression of cyclooxygenase-2 in bladder transitional cell carcinoma tissues].
abstract: OBJECTIVE
  To investigate the expression of cyclooxygenase-2 (COX-2) in bladder transitional cell carcinoma tissues, and understand its clinical significance.
  
  
  METHODS
  Reversal transcription polymerase chain reaction (RT-PCR) was used to assess the expression of COX-2 mRNA in 52 cases of bladder transitional cell carcinoma tissues and 17 cases of normal bladder tissues far from neoplasm; Western blot was used to assess the expression of COX-2 protein in 49 cases of bladder cancerous tissues and 17 cases of normal tissues.
  
  
  RESULTS
  Positive expression of COX-2 mRNA was detected in 83% (43/52) of bladder cancer tissues and in 29% (5/17) of normal tissues by RT-PCR and there was significant difference in expression of COX-2 mRNA between cancer tissues and normal tissues. Western blot analysis showed that expression of COX-2 protein was correlation with the stage and grade of cancer.
  
  
  CONCLUSIONS
  COX-2 is overexpressed in bladder transitional cell carcinoma. COX-2 maybe play a certain role in carcinogenesis and progression of bladder cancer and turn into a useful target of chemoprevention of bladder cancer.
authors.affiliation: Department of Urology, People's Hospital, Peking University, Beijing 100044, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Ren
authors.forename: Shu-kun
authors.initials: SK
authors.lastname: Hou
authors.forename: Ling-feng
authors.initials: LF
authors.lastname: He
authors.forename: Hai-yun
authors.initials: HY
authors.lastname: Ye
authors.forename: Kao-peng
authors.initials: KP
authors.lastname: Guan
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015153:Blotting, Western; D002295:Carcinoma, Transitional Cell / Q000201:enzymology* / Q000473:pathology; D051546:Cyclooxygenase 2 / Q000096:biosynthesis* / Q000235:genetics; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D001743:Urinary Bladder / Q000201:enzymology*; D001749:Urinary Bladder Neoplasms / Q000201:enzymology* / Q000473:pathology
chemical_list: D012333:RNA, Messenger; D051546:Cyclooxygenase 2