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Nimmrich, Inko; Sieuwerts, Anieta M.; Meijer-van Gelder, Marion E.; Schwope, Ina; Bolt-de Vries, Joan; Harbeck, Nadia; Koenig, Thomas; Hartmann, Oliver; Kluth, Antje; Dietrich, Dimo; Magdolen, Viktor; Portengen, Henk; Look, Maxime P.; Klijn, Jan G. M.; Lesche, Ralf; Schmitt, Manfred; Maier, Sabine; Foekens, John A.; Martens, John W. M.
Breast cancer research and treatment, 10/2008, Letnik: 111, Številka: 3Journal Article
Background In this study, we evaluated if PITX2 DNA methylation is a marker for disease recurrence in lymph node-negative (LNN), steroid hormone receptor-positive (HR+) breast cancer patients. In addition, we studied the association between PITX2 DNA methylation and PITX2 gene expression. Patients and methods PITX2 DNA-methylation was measured in tumor tissue from 412 LNN/HR+ breast cancer patients who had not received any adjuvant systemic treatment. In addition, PITX2 DNA-methylation and mRNA expression was evaluated in 32 breast cancer cell lines. Results In univariate Cox regression analysis, DNA-methylation of PITX2 as a continuous variable was associated with early distant metastasis (HR = 1.71; P < 0.01) and poor overall survival (HR = 1.71; P < 0.01). In multivariate analysis together with the established prognostic factors age, tumor size and tumor grade, and steroid hormone receptor levels, both associations retained their significance (for MFS, HR = 1.74; P < 0.01; for OS, HR = 1.46; P = 0.02). In the breast cancer cell lines, PITX2 DNA methylation was inversely association with PITX2A and PITX2B mRNA expression ( P < 0.01). Conclusions Hypermethylation of PITX2 is, in cell lines, negatively associated with PITX2 mRNA expression and, in clinical specimens, positively associated with breast cancer disease progression.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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