title: Expression of multidrug resistance gene product (P-glycoprotein) in transitional cell carcinomas of the upper urinary tract.
abstract: We assessed the expression of P-glycoprotein, the product of the multidrug resistance gene, in 107 specimens from patients with transitional cell carcinoma of the upper urinary tract, using an immunohistochemical method with a polyclonal antibody. P-glycoprotein was expressed in 28 of 107 (26%) specimens. While P-glycoprotein expression was not related to the grade or stage of these tumors, the incidence of P-glycoprotein in specimens with tumors which coexisted in renal pelvic and ureter is significantly higher than those with either renal pelvic or ureter tumor alone. In the patients with advanced upper urinary tract tumor who had adjuvant chemotherapy including at least one P-glycoprotein-transported drug (mdr regimen), overall survival of patients with P-glycoprotein-positive tumor was significantly shorter than that of patients with negative tumor. This pilot study demonstrates that P-glycoprotein can be expressed in one fourth of transitional cell carcinomas of the upper urinary tract and that P-glycoprotein expression serves as a prognostic indicator in patients with these tumors who are treated with mdr regimens.
authors.affiliation: Department of Urology, Hokkaido University School of Medicine, Sapporo, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Shinohara
authors.forename: K
authors.initials: K
authors.lastname: Nonomura
authors.forename: F
authors.initials: F
authors.lastname: Takakura
authors.forename: M
authors.initials: M
authors.lastname: Hamada
authors.forename: H B
authors.initials: HB
authors.lastname: Grossman
authors.forename: T
authors.initials: T
authors.lastname: Koyanagi
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000096:biosynthesis* / Q000235:genetics; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D002295:Carcinoma, Transitional Cell / Q000188:drug therapy / Q000378:metabolism* / Q000401:mortality / Q000473:pathology; D017024:Chemotherapy, Adjuvant; D002945:Cisplatin / Q000008:administration & dosage; D003520:Cyclophosphamide / Q000008:administration & dosage; D004317:Doxorubicin / Q000008:administration & dosage; D018432:Drug Resistance, Multiple / Q000235:genetics; D015251:Epirubicin / Q000008:administration & dosage; D005260:Female; D005500:Follow-Up Studies; D015870:Gene Expression; D006801:Humans; D007680:Kidney Neoplasms / Q000188:drug therapy / Q000378:metabolism* / Q000401:mortality / Q000473:pathology; D007682:Kidney Pelvis; D008297:Male; D008727:Methotrexate / Q000008:administration & dosage; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D012189:Retrospective Studies; D015996:Survival Rate; D014516:Ureteral Neoplasms / Q000188:drug therapy / Q000378:metabolism* / Q000401:mortality / Q000473:pathology; D014747:Vinblastine / Q000008:administration & dosage
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D015251:Epirubicin; D014747:Vinblastine; D004317:Doxorubicin; D003520:Cyclophosphamide; D002945:Cisplatin; D008727:Methotrexate