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Heat shock proteins (HSPs) are over-expressed in a wide range of human cancers. It results in the stimulation of the immune system and consequently in elevated concentration of anti-HSP autoantibodies. Elevated anti-HSP autoantibodies were found in breast cancer patients, and they are associated with tumor metastasis. Therefore, screening these autoantibodies could be of diagnostic and prognostic values. Protein microarrays have already demonstrated their great potential as a diagnostic tool. However, protein diversity requires optimization of the microarray fabrication to achieve high sensitivity and specificity. In this study, seven HSPs were immobilized on six different surface chemistries. After evaluation and optimization with purified antibodies of the six surface chemistries, two surfaces were selected to detect anti-HSP autoantibodies in breast cancer sera. Multiplex detection of anti-HSP autoantibodies allowed discrimination of breast cancer patients (50) from healthy controls (26) with a sensitivity of 86% and a specificity of 100%.

Original publication

DOI

10.1007/s00216-015-9257-2

Type

Journal article

Journal

Anal Bioanal Chem

Publication Date

02/2016

Volume

408

Pages

1497 - 1506

Keywords

Autoantibodies, Breast cancer, Heat shock proteins, Protein microarray, Antigens, Neoplasm, Autoantibodies, Biomarkers, Tumor, Breast Neoplasms, Case-Control Studies, Enzyme-Linked Immunosorbent Assay, Female, Heat-Shock Proteins, Humans, Immunoassay, Neoplasm Staging, Prospective Studies, Protein Array Analysis