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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Gene profiling and circulating tumor cells as biomarker to prognostic of patients with locoregional breast cancer

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Author(s):
Kuniyoshi, Renata K. [1] ; Gehrke, Flavia de Sousa [1] ; Alves, Beatriz C. A. [1] ; Vilas-Boas, Viviane [1] ; Colo, Anna E. [1] ; Sousa, Naiara [2] ; Nunes, Joao [2] ; Fonseca, Fernando L. A. [3, 1] ; Del Giglio, Auro [1]
Total Authors: 9
Affiliation:
[1] ABC Med Sch, Dept Hematol & Oncol, BR-09060650 Santo Andre, SP - Brazil
[2] Fundacao Pio XII, Hosp Canc Barretos, Barretos, SP - Brazil
[3] Univ Fed Sao Paulo, Dept Biol Sci, BR-09972270 Diadema, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: TUMOR BIOLOGY; v. 36, n. 10, p. 8075-8083, SEP 2015.
Web of Science Citations: 9
Abstract

The gene profile of primary tumors, as well as the identification of circulating tumor cells (CTCs), can provide important prognostic and predictive information. In this study, our objective was to perform tumor gene profiling (TGP) in combination with CTC characterization in women with nonmetastatic breast cancer. Biological samples (from peripheral blood and tumors) from 167 patients diagnosed with stage I, II, and III mammary carcinoma, who were also referred for adjuvant/neoadjuvant chemotherapy, were assessed for the following parameters: (a) the presence of CTCs identified by the expression of CK-19 and c-erbB-2 in the peripheral blood mononuclear cell (PBMC) fraction by quantitative reverse transcription PCR (RT-PCR) and (b) the TGP, which was determined by analyzing the expression of 21 genes in paraffin-embedded tissue samples by quantitative multiplex RT-PCR with the PlexorA (R) system. We observed a statistically significant correlation between the progression-free interval (PFI) and the clinical stage (p = 0.000701), the TGP score (p = 0.006538), and the presence of hormone receptors in the tumor (p = 0.0432). We observed no correlation between the PFI and the presence or absence of CK-19 or HER2 expression in the PBMC fraction prior to the start of treatment or in the two following readouts. Multivariate analysis revealed that only the TGP score significantly correlated with the PFI (p = 0.029247). The TGP is an important prognostic variable for patients with locoregional breast cancer. The presence of CTCs adds no prognostic value to the information already provided by the TGP. (AU)