title: [The significance of platelet-derived endothelial cell growth factor mRNA expression in superficial bladder cancer].
abstract: OBJECTIVE
  To investigate the mRNA expression of platelet-derived endothelial cell growth factor (PD-ECGF) in superficial bladder cancer and its significance.
  
  
  METHODS
  PD-ECGF mRNA expressions were determined by RT-PCR in 28 cases of superficial bladder cancers and 6 cases of normal bladder mucosa. The relation between PD-ECGF mRNA expression and tumor invasion to lamina propria or recurrence after transurethral resection was also analyzed.
  
  
  RESULTS
  Some degree of PD-ECGF mRNA expression was present in all the samples. The PD-ECGF mRNA level was 3.1-fold higher in pT(1) tumors than in normal bladder mucosa (t = 2.13, P < 0.05) and 2.2-fold higher in pT(1) tumors than in pT(a) tumors (t = 2.66, P < 0.05); G(3) tumors expressed 3.3-fold higher PD-ECGF mRNA than normal bladder mucosa (t = 2.44, P < 0.05) and 2.5-fold higher than G(1 - 2) tumors (t = 3.36, P < 0.01). Eleven cases recurred during the mean follow-up period of 18 months. Three-fold higher PD-ECGF mRNA expression was showed in cases who recurred after transurethral resection than that in cases who did not recur (t = 4.49, P < 0.01). The specificity and sensitivity of predicting tumor recurrence were 82.4% and 81.8% respectively using 0.095 as a cutoff value of PD-ECGF mRNA level in this group of superficial bladder cancer.
  
  
  CONCLUSIONS
  PD-ECGF mRNA expression correlates with tumor dedifferentiation and plays an important role in the early invasion in superficial bladder cancer. To analyze the PD-ECGF mRNA level contributes to the evaluations of tumor differentiation and invasion to lamina propria as well as recurrence prediction in superficial bladder cancer.
authors.affiliation: Department of Urology, Huashan Hospital, Fudan University, Shanghai 200040, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Li
authors.forename: Yuan-fang
authors.initials: YF
authors.lastname: Zhang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Ding
authors.forename: Chun-yin
authors.initials: CY
authors.lastname: Yan
authors.forename: Duan-gai
authors.initials: DG
authors.lastname: Wen
mesh_terms: D002295:Carcinoma, Transitional Cell / Q000378:metabolism* / Q000473:pathology; D005500:Follow-Up Studies; D006801:Humans; D012333:RNA, Messenger / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013939:Thymidine Phosphorylase / Q000235:genetics / Q000378:metabolism*; D001749:Urinary Bladder Neoplasms / Q000378:metabolism* / Q000473:pathology
chemical_list: D012333:RNA, Messenger; D013939:Thymidine Phosphorylase