title: Expression of glutathione S-transferase activity and glutathione content in squamous cell carcinoma of bladder associated with schistosomiasis in a population in Egypt.
abstract: The present study was designed to describe the expression of the glutathione S-transferase/glutathione system in squamous cell carcinoma of the bladder in a population in Egypt. The glutathione-S transferase activity was significantly higher in bladder cancer specimens (n = 40) in comparison with schistosomiasis cystitis tissue (n = 42) (4-fold, p = 1 x 10(-12)) and with healthy control samples (n = 9) (10-fold, p = 1 x 10(-6)). The glutathione content was also significantly higher in bladder cancer than in cystitis tissue (2-fold, p = 8 x 10(-6)) and in control samples (6-fold, 8 x 10(-6)). When control mucosa and cystitis samples were compared, 2-fold increased values were obtained for glutathione-S transferase (p = 4 x 10(-3)) and glutathione (p = 1 x 10(-3)) in schistosomiasis bladder tissue. Results describe an over-expression of glutathione-S transferase and glutathione levels in squamous cell carcinoma of the bladder, and indicate a possible role in chemoresistance to pharmacological therapy.
authors.affiliation: Urology Department, Faculty of Medicine, Assiut University, Egypt.
authors.forename: G E
authors.initials: GE
authors.lastname: Ghazaly
authors.forename: M M
authors.initials: MM
authors.lastname: Zakahary
authors.forename: M A
authors.initials: MA
authors.lastname: el-Aziz
authors.forename: A A
authors.initials: AA
authors.lastname: Mahmoud
authors.forename: P
authors.initials: P
authors.lastname: Carretero
authors.forename: A
authors.initials: A
authors.lastname: Lafuente
mesh_terms: D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000473:pathology; D002471:Cell Transformation, Neoplastic / Q000235:genetics* / Q000473:pathology; D019008:Drug Resistance, Neoplasm / Q000235:genetics; D004534:Egypt; D005260:Female; D015971:Gene Expression Regulation, Enzymologic / Q000502:physiology; D005978:Glutathione / Q000378:metabolism*; D005982:Glutathione Transferase / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012553:Schistosomiasis haematobia / Q000235:genetics* / Q000473:pathology; D001743:Urinary Bladder / Q000473:pathology; D001749:Urinary Bladder Neoplasms / Q000235:genetics* / Q000473:pathology
chemical_list: D005982:Glutathione Transferase; D005978:Glutathione