Artículo

Schillaci, R.; Guzmán, P.; Cayrol, F.; Beguelin, W.; Díaz Flaqué, M.C.; Proietti, C.J.; Pineda, V.; Palazzi, J.; Frahm, I.; Charreau, E.H.; Maronna, E.; Roa, J.C.; Elizalde, P.V. "Clinical relevance of ErbB-2/HER2 nuclear expression in breast cancer" (2012) BMC Cancer. 12
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Abstract:

Background: The biological relevance of nuclear ErbB-2/HER2 (NuclErbB-2) presence in breast tumors remains unexplored. In this study we assessed the clinical significance of ErbB-2 nuclear localization in primary invasive breast cancer. The reporting recommendations for tumor marker prognostic studies (REMARK) guidelines were used as reference.Methods: Tissue microarrays from a cohort of 273 primary invasive breast carcinomas from women living in Chile, a Latin American country, were examined for membrane (MembErbB-2) and NuclErbB-2 expression by an immunofluorescence (IF) protocol we developed. ErbB-2 expression was also evaluated by immunohistochemistry (IHC) with a series of antibodies. Correlation between NuclErbB-2 and MembErbB-2, and between NuclErbB-2 and clinicopathological characteristics of tumors was studied. The prognostic value of NuclErbB-2 in overall survival (OS) was evaluated using Kaplan-Meier method, and Cox model was used to explore NuclErbB-2 as independent prognostic factor for OS.Results: The IF protocol we developed showed significantly higher sensitivity for detection of NuclErbB-2 than IHC procedures, while its specificity and sensitivity to detect MembErbB-2 were comparable to those of IHC procedures. We found 33.6% NuclErbB-2 positivity, 14.2% MembErbB-2 overexpression by IF, and 13.0% MembErbB-2 prevalence by IHC in our cohort. We identified NuclErbB-2 positivity as a significant independent predictor of worse OS in patients with MembErbB-2 overexpression. NuclErbB-2 was also a biomarker of lower OS in tumors that overexpress MembErbB-2 and lack steroid hormone receptors.Conclusions: We revealed a novel role for NuclErbB-2 as an independent prognostic factor of poor clinical outcome in MembErbB-2-positive breast tumors. Our work indicates that patients presenting NuclErbB-2 may need new therapeutic strategies involving specific blockage of ErbB-2 nuclear migration. © 2012 Schillaci et al; BioMed Central Ltd.

Registro:

Documento: Artículo
Título:Clinical relevance of ErbB-2/HER2 nuclear expression in breast cancer
Autor:Schillaci, R.; Guzmán, P.; Cayrol, F.; Beguelin, W.; Díaz Flaqué, M.C.; Proietti, C.J.; Pineda, V.; Palazzi, J.; Frahm, I.; Charreau, E.H.; Maronna, E.; Roa, J.C.; Elizalde, P.V.
Filiación:Instituto de Biología y Medicina Experimental (IBYME), CONICET, Buenos Aires, Argentina
Departamento de Anatomía Patológica (BIOREN) y, Universidad de La Frontera, Temuco, Chile
Departamento de Cirugía, Facultad de Medicina, Universidad de La Frontera, Temuco, Chile
Universidad Abierta Interamericana (UAI), Rosario, Argentina
Servicio de Patología, Sanatorio Mater Dei, Buenos Aires, Argentina
Laboratory of Molecular Mechanisms of Carcinogenesis, Instituto de Biología y Medicina Experimental (IBYME), Obligado 2490, Buenos Aires 1428, Argentina
Palabras clave:epidermal growth factor receptor 2; steroid receptor; tumor marker; epidermal growth factor receptor 2; membrane protein; nuclear protein; tumor marker; accuracy; adolescent; adult; article; breast carcinoma; cancer grading; cancer invasion; cancer prognosis; cancer staging; cancer survival; cellular distribution; clinical evaluation; cohort analysis; controlled study; disease association; female; histopathology; human; human tissue; immunofluorescence test; immunohistochemistry; major clinical study; outcome assessment; overall survival; primary tumor; process development; protein expression; protein function; protein localization; risk assessment; sensitivity and specificity; signal transduction; tissue microarray; tumor volume; aged; breast tumor; carcinoma; chemistry; Chile; Kaplan Meier method; metabolism; microarray analysis; middle aged; prognosis; proportional hazards model; Adult; Aged; Breast Neoplasms; Carcinoma; Chile; Cohort Studies; Female; Humans; Immunohistochemistry; Kaplan-Meier Estimate; Membrane Proteins; Microarray Analysis; Middle Aged; Nuclear Proteins; Prognosis; Proportional Hazards Models; Receptor, erbB-2; Tumor Markers, Biological
Año:2012
Volumen:12
DOI: http://dx.doi.org/10.1186/1471-2407-12-74
Título revista:BMC Cancer
Título revista abreviado:BMC Cancer
ISSN:14712407
CODEN:BCMAC
CAS:epidermal growth factor receptor 2, 137632-09-8; Membrane Proteins; Nuclear Proteins; Receptor, erbB-2, 2.7.10.1; Tumor Markers, Biological
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14712407_v12_n_p_Schillaci

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Citas:

---------- APA ----------
Schillaci, R., Guzmán, P., Cayrol, F., Beguelin, W., Díaz Flaqué, M.C., Proietti, C.J., Pineda, V.,..., Elizalde, P.V. (2012) . Clinical relevance of ErbB-2/HER2 nuclear expression in breast cancer. BMC Cancer, 12.
http://dx.doi.org/10.1186/1471-2407-12-74
---------- CHICAGO ----------
Schillaci, R., Guzmán, P., Cayrol, F., Beguelin, W., Díaz Flaqué, M.C., Proietti, C.J., et al. "Clinical relevance of ErbB-2/HER2 nuclear expression in breast cancer" . BMC Cancer 12 (2012).
http://dx.doi.org/10.1186/1471-2407-12-74
---------- MLA ----------
Schillaci, R., Guzmán, P., Cayrol, F., Beguelin, W., Díaz Flaqué, M.C., Proietti, C.J., et al. "Clinical relevance of ErbB-2/HER2 nuclear expression in breast cancer" . BMC Cancer, vol. 12, 2012.
http://dx.doi.org/10.1186/1471-2407-12-74
---------- VANCOUVER ----------
Schillaci, R., Guzmán, P., Cayrol, F., Beguelin, W., Díaz Flaqué, M.C., Proietti, C.J., et al. Clinical relevance of ErbB-2/HER2 nuclear expression in breast cancer. BMC Cancer. 2012;12.
http://dx.doi.org/10.1186/1471-2407-12-74