Tumor Biology

, Volume 36, Issue 8, pp 5865–5871 | Cite as

Tau and PTEN status as predictive markers for response to trastuzumab and paclitaxel in patients with HER2-positive breast cancer

  • Dong-Hoe Koo
  • Hee Jin Lee
  • Jin-Hee Ahn
  • Dok Hyun Yoon
  • Sung-Bae Kim
  • Gyungyub Gong
  • Byung Ho Son
  • Sei Hyun Ahn
  • Kyung Hae Jung
Research Article


Trastuzumab (H)-based chemotherapy has been an active treatment in patients with HER2-positive breast cancer; however, primary and secondary resistance has occurred in patients treated with H alone or in combination with chemotherapy. Biomarkers were searched using tissue microarrays (TMA) in HER2-positive advanced breast cancer patients treated with H and paclitaxel (P) combination chemotherapy between October 2004 and August 2010. Tumor blocks were analyzed for Tau-protein, beta-III tubulin, PTEN, p27, IGF-1R, c-Met, CD44, and MUC4 by immunohistochemical (IHC) analysis. The correlation between IHC status and clinical outcomes, including response rate (RR), progression free survival (PFS), and overall survival (OS), was investigated. With a median follow-up duration of 54.1 months (range, 42.3–72.7 months), 65 patients received H + P chemotherapy. The overall RR was 63 % (95 % CI, 51–75 %), and seven patients (11 %) with high Tau/low PTEN expression showed a significantly lower RR (14 % vs. 69 %; p = 0.008). The odds ratio for a poor response was 13.3 (95 % CI, 1.5–119.0; p = 0.020). In addition, patients with high Tau/low PTEN showed a trend of poor survival in terms of PFS (6.6 months vs. 9.6 months, p = 0.052). Subsequent multivariate analysis showed that high Tau/low PTEN (hazard ratio [HR] 2.40, 95 % CI, 1.06–5.47; p = 0.037) was the poor prognostic factor independently associated with PFS after adjusting for possible confounding factors such as recurrence/metastasis, age, performance status, visceral metastasis, and hormone receptor status. High Tau-protein and low PTEN expression showed a significant association with poor response to H + P chemotherapy in patients with HER2-positive advanced breast cancer.


Breast neoplasms Trastuzumab Paclitaxel Resistance Tau PTEN 


Conflicts of interest



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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2015

Authors and Affiliations

  • Dong-Hoe Koo
    • 1
    • 4
  • Hee Jin Lee
    • 2
  • Jin-Hee Ahn
    • 1
  • Dok Hyun Yoon
    • 1
  • Sung-Bae Kim
    • 1
  • Gyungyub Gong
    • 2
  • Byung Ho Son
    • 3
  • Sei Hyun Ahn
    • 3
  • Kyung Hae Jung
    • 1
  1. 1.Department of Oncology, Asan Medical CenterUniversity of Ulsan College of MedicineSongpa-guKorea
  2. 2.Department of Pathology, Asan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
  3. 3.Department of Surgery, Asan Medical CenterUniversity of Ulsan College of MedicineSeoulKorea
  4. 4.Division of Hematology/Oncology, Department of Internal Medicine, Kangbuk Samsung Medical CenterSungkyunkwan University School of MedicineSeoulKorea

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