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| Content Provider | PubMed Central |
|---|---|
| Author | Marchi, Tommaso De Timmermans, Anne M. Smid, Marcel Look, Maxime P. Stingl, Christoph Opdam, Mark Linn, Sabine C. Sweep, Fred C. G. J. Span, Paul N. Mike, Kliffen Deurzen, Carolien H. M. Van Luider, Theo M. Foekens, John A. Martens, John W. Umar, Arzu |
| Copyright Year | 2016 |
| Abstract | Tamoxifen therapy resistance constitutes a major cause of death in patients with recurrent estrogen receptor (ER) positive breast cancer. Through high resolution mass spectrometry (MS), we previously generated a 4-protein predictive signature for tamoxifen therapy outcome in recurrent breast cancer. ANXA1 and CALD1, which were not included in the classifier, were however the most differentially expressed proteins. We first evaluated the clinical relevance of these markers in our MS cohort, followed by immunohistochemical (IHC) staining on an independent set of tumors incorporated in a tissue microarray (TMA) and regression analysis in relation to time to progression (TTP), clinical benefit and objective response. In order to assess which mechanisms ANXA1 and CALD1 might been involved in, we performed Ingenuity pathway analysis (IPA) on ANXA1 and CALD1 correlated proteins in our MS cohort. ANXA1 (Hazard ratio [HR] = 1.83; 95% confidence interval [CI]: 1.22–2.75; P = 0.003) and CALD1 (HR = 1.57; 95% CI: 1.04–2.36; P = 0.039) based patient stratification showed significant association to TTP, while IHC staining on TMA showed that both ANXA1 (HR = 1.82; 95% CI: 1.12–3.00; P = 0.016) and CALD1 (HR = 2.29; 95% CI: 1.40–3.75; P = 0.001) expression was associated with shorter TTP independently of traditional predictive factors. Pearson correlation analysis showed that the majority of proteins correlated to ANXA1 also correlated with CALD1. IPA indicated that ANXA1 and CALD1 were associated with ER-downregulation and NFκB signaling. We hereby report that ANXA1 and CALD1 proteins are independent markers for tamoxifen therapy outcome and are associated to fast tumor progression. |
| Related Links | http://dx.doi.org/10.18632/oncotarget.6521 |
| Starting Page | 3098 |
| File Format | |
| ISSN | 19492553 |
| e-ISSN | 19492553 |
| Journal | Oncotarget |
| Issue Number | 3 |
| Volume Number | 7 |
| Language | English |
| Publisher | Impact Journals LLC |
| Publisher Date | 2016-01-01 |
| Access Restriction | Open |
| Rights Holder | Impact Journals LLC |
| Subject Keyword | Medicine(all) Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Oncology |
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