Potential of epithelial membrane protein 3 as a novel therapeutic target for human breast cancer.

IF 3.8 3区 医学 Q2 ONCOLOGY
Oncology reports Pub Date : 2025-01-01 Epub Date: 2024-11-29 DOI:10.3892/or.2024.8849
Yi-Wen Wang, Yih-Lin Tuan, Jiu-Yao Wang, Hong-Yi Chang, Chien-An Chu, Yi-Lin Chen, Hui-Wen Chen, Chung-Liang Ho, Chung-Ta Lee, Nan-Haw Chow
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引用次数: 0

Abstract

Amplification of human epidermal growth factor 2 receptor (HER2) and overexpression of estrogen receptor (ER) and/or progesterone receptor (PR) are key determinants in the treatment planning for human breast cancer (BC). Currently, targeted therapies for BC are focused mainly on these biomarkers. However, development of resistance to targeted drugs is almost unavoidable, emphasizing the importance of biochemical and pharmaceutical advances to improve treatment outcomes. To the best of our knowledge, the present study is the first to show functional crosstalk in vitro between HER2 and epithelial membrane protein 3 (EMP3), a tetraspan membrane protein, in human BC. EMP3 overexpression significantly promoted BC cell proliferation, invasion and migration by Transwell assays via epithelial-mesenchymal transition and transactivated the HER family, resulting in increased ER and PR expression in vitro. Knocking down EMP3 notably suppressed cell proliferation and migration and was accompanied by decreased expression of HER1‑HER3 and p‑SRC proteins. Suppression of EMP3 expression enhanced sensitivity of BC cells to trastuzumab in vitro. Xenograft experiments revealed decreased expression of HER1 and HER2 in stable EMP3‑knockdown cells, resulting in decreased tumor weight and size. In patients with BC, EMP3 overexpression was detected in 72 of 166 cases (43.4%), with 18 of 43 (41.9%) HER2‑amplified BC samples co‑expressing EMP3. Co‑expression of EMP3 and HER2 was positively associated with ER expression (P=0.028) and tended to be associated with nodal metastasis (P=0.085), however this was not significant. Taken together, the present results supported the potential of targeting EMP3 as a novel therapeutic strategy for human BC via co‑expression of HER2 and EMP3.

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来源期刊
Oncology reports
Oncology reports 医学-肿瘤学
CiteScore
8.50
自引率
2.40%
发文量
187
审稿时长
3 months
期刊介绍: Oncology Reports is a monthly, peer-reviewed journal devoted to the publication of high quality original studies and reviews concerning a broad and comprehensive view of fundamental and applied research in oncology, focusing on carcinogenesis, metastasis and epidemiology.
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