Identification of 3q oncogene SEC62 as a marker for distant metastasis and poor clinical outcome in invasive ductal breast cancer

  • Ferenc Zoltan TakacsEmail author
  • Julia Caroline Radosa
  • Maximilian Linxweiler
  • Mariz Kasoha
  • Rainer M. Bohle
  • Florian Bochen
  • Clara Unger
  • Erich-Franz Solomayer
  • Bernard Schick
  • Ingolf Juhasz-Böss
Gynecologic Oncology



In previous studies, we have shown that SEC62 has an essential function in cell migration, epithelial-to-mesenchymal transition, and endoplasmic reticulum stress tolerance of cancer cells. SEC62 expression correlated with distant and lymph node metastasis and poor outcome in different cancer entities. In this initial study, we investigated SEC62 expression and its possible role as a prognostic and predictive biomarker in breast cancer (BC).


Formalin-fixed, paraffin-embedded tissue samples of 53 BC patients were analyzed by immunohistochemistry. The immunoreactive score (IRS) according to Remmele and Stegner was evaluated and correlated with clinico-pathological findings and overall survival (OS).


We found increased SEC62 protein levels in tumor tissue compared to tumor-free tissue samples from the same patients. Tumors with high SEC62 expression (IRS > 8), or containing isolated cells with high SEC62 staining intensity, independent of the IRS, had more frequently distant metastases (48.4% vs. 18.2%; p = 0.024 and 47.4 vs. 6.7%; p = 0.005, respectively). Overall survival was significantly worse in BC patients with high SEC62 expression (SEC62 IRS > 8) (54.8% vs. 81.8%; p = 0.011) and in cases with isolated high-intensity SEC62 staining cells independently of SEC62 IRS (55.3% vs 93.3%; p = 0.024).


We are the first to describe the SEC62 expression and its correlation to clinicopathological parameters in mammary carcinoma. Our results suggest that SEC62 expression may serve as a prognostic marker for patients with invasive ductal breast cancer.


SEC62 Immunohistochemistry Breast cancer Prognostic factor Biomarker Metastasis 



The authors gratefully acknowledge the excellent work, motivation, and enthusiasm of Mrs. Barbara Linxweiler and Mrs. Alice Kunz.

Author contribution

FZT project development, data collection and analysis, manuscript writing. JCR review and editing. ML data analysis, review and editing. MK data collection, review and editing. RMB project development, data collection, review and editing. FB review and editing, visualization. CU data collection, review and editing. EFS review and editing. BS review and editing. IJB review and editing.


The study was funded by the Heinrich Dietz Foundation.

Compliance with ethical standards

Conflict of interest

We declare that we have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. All patients provided written consent for the use of their tissue samples. The study was approved by the Ethics Committee of Saarland (No: 183/17).


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Obstetrics and GynecologyUniversity of SaarlandHomburgGermany
  2. 2.Department of Otorhinolaryngology, Head and Neck SurgeryUniversity of SaarlandHomburgGermany
  3. 3.Department of General and Surgical PathologyUniversity of SaarlandHomburgGermany

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