title: Expression of multidrug resistance protein in metastatic colorectal carcinomas.
abstract: To clarify the relationship between multidrug resistance protein (MRP) and clinicopathologic features, the influence of adjuvant chemotherapy, and prognosis of patients who underwent resection of metastatic liver carcinomas originating from colorectal carcinomas, we examined the expression of MRP in tumor tissues by immunostaining. Specimens of 38 primary colorectal tumors and 44 metastatic liver tumors of colorectal origin were examined (metastatic group). We also examined 28 nonmetastatic colorectal carcinomas. The percentages of nonmetastatic tumors and of primary and metastatic tumors of the metastasis group that expressed MRP were similar. MRP expression in primary and metastatic tumors did not correlate with any clinicopathologic features. The use of adjuvant chemotherapy after operation for primary colorectal carcinomas was associated with increased MRP expression among metastatic liver tumors. Expression of MRP in the tumor did not influence the prognosis or survival rate after resection of primary or metastatic tumors. Our data suggest that MRP expression in metachronous liver metastases from colorectal carcinomas may be induced by administration of anticancer drugs but is not associated with clinicopathologic features of the tumor, liver metastasis, or prognosis.
authors.affiliation: First Department of Surgery, Nagasaki University School of Medicine, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Nanashima
authors.forename: H
authors.initials: H
authors.lastname: Yamaguchi
authors.forename: S
authors.initials: S
authors.lastname: Matsuo
authors.forename: Y
authors.initials: Y
authors.lastname: Sumida
authors.forename: T
authors.initials: T
authors.lastname: Tsuji
authors.forename: T
authors.initials: T
authors.lastname: Sawai
authors.forename: T
authors.initials: T
authors.lastname: Yasutake
authors.forename: T
authors.initials: T
authors.lastname: Nakagoe
authors.forename: H
authors.initials: H
authors.lastname: Ayabe
mesh_terms: D018528:ATP-Binding Cassette Transporters / Q000378:metabolism*; D000368:Aged; D000704:Analysis of Variance; D000970:Antineoplastic Agents / Q000627:therapeutic use; D017024:Chemotherapy, Adjuvant; D015179:Colorectal Neoplasms / Q000188:drug therapy / Q000378:metabolism* / Q000473:pathology*; D005260:Female; D019450:Genes, MDR; D006801:Humans; D008113:Liver Neoplasms / Q000378:metabolism* / Q000556:secondary*; D008297:Male; D008875:Middle Aged; D027425:ATP-Binding Cassette, Sub-Family C Proteins; D011379:Prognosis
chemical_list: D018528:ATP-Binding Cassette Transporters; D000970:Antineoplastic Agents; D027425:ATP-Binding Cassette, Sub-Family C Proteins