An autoimmune response signature associated with the development of triple negative breast cancer reflects disease pathogenesis.

Publication Type:

Journal Article

Source:

Cancer research, Volume 75, Issue 16, p.3246-54 (2015)

Keywords:

Scientific Imaging Core Facility

Abstract:

The repertoire of antigens associated with the development of an autoimmune response in breast cancer has relevance to detection and treatment strategies. We have investigated the occurrence of autoantibodies associated with the development of triple negative breast cancer (TNBC) in the prior to diagnosis setting and in samples collected at the time of diagnosis of TNBC. Lysate arrays containing protein fractions from the TNBC MDA-MB-231 cell line were hybridized with TNBC plasmas from the Women's Health Initiative cohort, collected prior to clinical diagnosis and with plasmas from matched controls. An immune response directed against spliceosome and glycolysis proteins was observed with case plasmas as previously reported in ER+ breast cancer. Importantly autoantibodies directed against networks involving BRCA1, TP53 and cytokeratin proteins associated with a mesenchymal/basal phenotype were distinct to TNBC prior to diagnosis samples. Concordant autoantibody findings were observed with mouse plasma samples collected prior to occurrence of palpable tumors from a C3(1)-T triple negative mouse model. Plasma samples collected at the time of diagnosis of stage II TNBC and from matched healthy controls were subjected to proteomic analysis by mass spectrometry to identify Ig bound proteins yielding a predominance of cytokeratins including several associated with a mesenchymal/basal phenotype among cases compared to controls. Our data provide evidence indicative of a dynamic repertoire of antigens associated with a humoral immune response reflecting disease pathogenesis in TNBC.