Co-expression of cancer testis antigens and topoisomerase 2-alpha in triple negative breast carcinomas |
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Authors: | Ivana Mrkli? Giulio Cesare Spagnoli Antonio Jureti? Zenon Pogoreli? Snje?ana Tomi? |
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Institution: | 1. Department of Pathology, Forensic Medicine and Cytology, Split University Hospital Center, University of Split, School of Medicine, Spin?i?eva 1, Split, Croatia;2. Department of Surgery, Research Laboratory, University Hospital Basel, Basel, Switzerland;3. Department of Oncology, Zagreb University Hospital Center, University of Zagreb, School of Medicine, Kispati?eva 12, Zagreb, Croatia;4. Department of Pediatric Surgery, Split University Hospital Center, University of Split, School of Medicine, Spin?i?eva 1, Split, Croatia |
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Abstract: | Triple negative breast cancers (TNBC) are characterized by aggressive tumor biology, lack of targeted treatments and poor prognosis. Anthracyclins were shown to induce immunogenic death in target cells, potentially leading to “endogenous” vaccination. We comparatively assessed expression of cancer testis antigens (CTA) and topoisomerase 2-alpha (TOPO2A), a well defined molecular target of anthracyclins, in TNBC fully characterized for basal-like (BL) immunophenotype, BL morphology and conventional clinicopathological factors. The study included 83 patients undergoing surgery between January 2003 and December 2009. Tissue sections were stained with CK5/6, CK14, EGFR, Ki-67, TOPO2A, MAGE-A1, MAGE-A10, NY-ESO and multi-MAGE-A specific reagents. Of the 83 TNBC, >66.3% had BL immunophenotype and 48.2% had BL morphology. MAGE-A1 specific staining was most frequently detectable (69.2%), followed by multi-MAGE-A (58%), NY-ESO (27.1%) and MAGE-A10 (16%) specific staining. MAGE-A10 expression significantly correlated with tumor size (p = 0.026). Furthermore, MAGE-A1, MAGE-A10 and multi-MAGE-A specific stainings significantly correlated with advanced clinical stage (p = 0.024, p = 0.041, p = 0.031, respectively). We found no significant association between CTA expression and disease free (DFS) or overall survival (OS). Most interestingly, a significant correlation was observed between expression of MAGE-A10 and NY-ESO and expression of TOPO2A (p = 0.005, p = 0.013). Expression of defined CTA and TOPO2A are significantly correlated in TNBC. Considering the limited therapeutic options for TNBC, these findings might suggest novel forms of combination therapies that should be further explored. |
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Keywords: | Basal like breast cancer Cancer testis antigens Combination treatments Topoisomerase 2-alpha Triple negative breast cancer Human |
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