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• W2041263313 abstract "Abstract The evaluation of disseminated epithelial tumor cells in breast cancer patients has generated considerable interest due to its potential association with disease recurrence. Our work was performed to analyze the usefulness of 5 mucin genes expression (MUC2, MUC3, MUC5B, MUC6 and MUC7), using RT‐PCR assays, to detect disseminated cancer cells in patients with operable breast cancer. The highest frequencies of positive RT‐PCR tests in breast tumor extracts were observed for MUC5B (7/15) and MUC7 (5/12). The best specificity, negative results on all peripheral blood mononuclear (PBMN) cell samples from healthy donors, were shown for MUC2, MUC5B and MUC6 RT‐PCR assays. Thus, we selected MUC5B as a target gene for further evaluation. Using a nested RT‐PCR, MUC5B mRNA transcripts were detected in 16/31 primary breast tumors (but not in 36 samples of normal PBMN cells) and in the human MCF‐7 breast cancer cell line but not in BT20, MDA, T47D and ZR‐75 breast cancer cell lines, indicating that MUC5B mRNA is expressed in a population of breast cancer cells. Using this method, 9/46 patients (19.5%) who underwent curative surgery showed positive MUC5B mRNA in bone marrow aspirates obtained prior to surgery, including 5/24 patients (20.8%) with stage I or II breast cancer, without histopathologic lymph node involvement. These results indicate that MUC5B mRNA could be a specific marker applicable to the molecular diagnosis of breast cancer cell dissemination. A comparative evaluation between MUC5B mRNA, cytokeratin 19 (CK19) mRNA and carcinoembryonic antigen (CEA) mRNA in all bone marrow aspirates suggests a putative complementation for molecular detection of disseminated carcinoma cells. Considering that breast cancer is characterized by a great phenotypic heterogeneity, the use of multimarker approach could contribute to tumor cell detection in bone marrow and blood. © 2002 Wiley‐Liss, Inc." @default.
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• W2041263313 date "2002-11-22" @default.
• W2041263313 modified "2023-10-17" @default.
• W2041263313 title "Detection of bone marrow-disseminated breast cancer cells using an RT-PCR assay of MUC5B mRNA" @default.
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• W2041263313 doi "https://doi.org/10.1002/ijc.10853" @default.
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