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  • Title: Detection of occult HER2 mRNA-positive tumor cells in the peripheral blood of patients with operable breast cancer: evaluation of their prognostic relevance.
    Author: Apostolaki S, Perraki M, Kallergi G, Kafousi M, Papadopoulos S, Kotsakis A, Pallis A, Xenidis N, Kalmanti L, Kalbakis K, Agelaki S, Kalykaki A, Stournaras C, Stathopoulos E, Georgoulias V, Mavroudis D.
    Journal: Breast Cancer Res Treat; 2009 Oct; 117(3):525-34. PubMed ID: 19016323.
    Abstract:
    To evaluate whether HER2 mRNA could be used as a marker of circulating tumor cells (CTCs) in women with operable breast cancer. A nested RT-PCR assay was developed and used for the detection of HER2 mRNA-positive CTCs. Blood from 216 women with early breast cancer obtained before adjuvant treatment was tested for HER2 mRNA-positive cells to assess their prognostic value. Nested RT-PCR for HER2 mRNA showed high sensitivity whereas no HER2 mRNA-positive cells could be identified in the blood of healthy donors. HER2 mRNA-positive CTCs were detected in 53 (24.5%) of 216 patients and HER2 mRNA detection was associated with reduced disease-free survival (DFS; P < 0.0001) and overall survival (OS; P = 0.004). In multivariate analysis, detection of HER2 mRNA-positive CTCs emerged as independent prognostic factor for DFS (P = 0.0001) and OS (P = 0.003). HER2 mRNA could be a valuable prognostic marker for the detection of CTCs in early breast cancer patients.
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