Expression and role of epithelial membrane proteins in tumorigenesis of hormone receptor-positive breast cancer

Yoon Jin Cha, Ja Seung Koo

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Purpose: Studies on the expression of epithelial membrane proteins (EMPs) in breast cancer have been rare and limited. In the present study, we aimed to evaluate the expression of EMP1, EMP2, and EMP3 in invasive ductal carcinoma (IDC) of the breast, and investigate their clinical implications. Methods: In total, 418 IDC cases were collected, and specimens were used to construct a tissue microarray. Immunohistochemical staining of EMP1, EMP2, and EMP3 was performed and the results were analyzed in combination with the clinical data. Results: EMP1 was expressed in > 90% of all IDC subtypes. A decreased expression of EMP2 and EMP3 was observed in triple-negative breast cancer. EMP3 expression was independently associated with human epidermal growth factor receptor 2 (HER2) positivity. HER2-negative cases exhibited a decreased EMP2 expression along with a higher histological grade and an increased proliferative index. No significant difference was found in the overall survival or disease-free survival based on the EMP expression. In HER2-negative breast cancer, EMP2 expression inversely correlated with the histological grade and proliferative index. Conclusion: EMP2 may be involved in the early stage of tumor development in hormone-positive breast cancer.

Original languageEnglish
Pages (from-to)385-397
Number of pages13
JournalJournal of Breast Cancer
Issue number4
Publication statusPublished - 2020 Aug

Bibliographical note

Publisher Copyright:
© 2020 Korean Breast Cancer Society.

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research


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