Volume 132, Issue 5 pp. 1105-1113
Early Detection and Diagnosis

Identification and validation of new autoantibodies for the diagnosis of DCIS and node negative early-stage breast cancers

Jérôme Lacombe

Jérôme Lacombe

Department of Cellular Biology, CHU Montpellier, Arnaud de Villeneuve, Montpellier, France

Department of Medicine, University of Montpellier I, Montpellier, France

CRLC Val d'Aurelle, Department of Clinical Oncoproteomics, Montpellier, France

J.L. and A.M. contributed equally to this work

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Alain Mangé

Alain Mangé

Department of Cellular Biology, CHU Montpellier, Arnaud de Villeneuve, Montpellier, France

Department of Medicine, University of Montpellier I, Montpellier, France

CRLC Val d'Aurelle, Department of Clinical Oncoproteomics, Montpellier, France

J.L. and A.M. contributed equally to this work

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Marta Jarlier

Marta Jarlier

CRLC Val d'Aurelle, Department of Biostatistics, Montpellier, France

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Caroline Bascoul-Mollevi

Caroline Bascoul-Mollevi

CRLC Val d'Aurelle, Department of Biostatistics, Montpellier, France

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Philippe Rouanet

Philippe Rouanet

CRLC Val d'Aurelle, Department of Surgery, Montpellier, France

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Pierre-Jean Lamy

Pierre-Jean Lamy

CRLC Val d'Aurelle, Department of Biology, Montpellier, France

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Thierry Maudelonde

Thierry Maudelonde

Department of Cellular Biology, CHU Montpellier, Arnaud de Villeneuve, Montpellier, France

Department of Medicine, University of Montpellier I, Montpellier, France

CRLC Val d'Aurelle, Department of Clinical Oncoproteomics, Montpellier, France

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Jérôme Solassol

Corresponding Author

Jérôme Solassol

Department of Cellular Biology, CHU Montpellier, Arnaud de Villeneuve, Montpellier, France

Department of Medicine, University of Montpellier I, Montpellier, France

CRLC Val d'Aurelle, Department of Clinical Oncoproteomics, Montpellier, France

Tel.: 33-4-67-61-24-12, Fax: 33-4-67-33-95-90

Batiment de recherche du CRLC Val d'Aurelle, 208 rue des Apothicaires, 34298 Montpellier Cedex 5, FranceSearch for more papers by this author
First published: 07 August 2012
Citations: 40

Abstract

Evidence of circulating autoantibodies in cancer patient sera has created opportunities for exploiting them as biomarkers. We report the identification and the clinical validation of an autoantibody panel in newly diagnosed patients with early-stage breast cancer. Proteomic approach and serological screening of a discovery set of sera (n = 80) were performed to identify tumor-associated antigens (TAAs). Autoantibody levels were then measured in an independent validation set (n = 182) against a panel of five TAAs by enzyme-linked immunosorbent assay. Sixty-seven antigens that elicited a specific humoral response in breast cancer were identified and five antigens (GAL3, PAK2, PHB2, RACK1 and RUVBL1) were selected for validation. GAL3 and RACK1 showed significantly increased reactivity in early-stage breast cancer. When combined, the five markers significantly discriminated early-stage cancer from healthy individuals (AUC = 0.81; 95% CI [0.74–0.86]). Interestingly, this value was high in both node-negative early-stage primary breast cancer (AUC = 0.81; 95% CI [0.72–0.88]) and ductal carcinoma in situ (AUC = 0.85; 95% CI [0.76–0.95]) populations. This autoantibody panel could be useful as a diagnostic tool in a screening strategy of early-stage invasive breast cancer and preinvasive breast cancer. It could be particularly appropriate in complement to mammography for women with high breast density.

Abstract

What's new?

This study shows the clinical relevance of a combination of five antigens as a blood-screening test for early breast cancer detection. The antigens were identified using a proteomic approach and validated in an independent cohort of 182 samples by ELISA. Since the effectiveness of mammographic screening declines in cohorts of patients with dense breast tissue and small lesions, testing for the status of this biomarker panel may help improve the detection of early-stage cancer in women.

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