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Zinc Finger Protein 639 Expression Is a Novel Prognostic Determinant in Breast Cancer
Fang Lee1, Shih-Ping Cheng1,2,3,4, Ming-Jen Chen1,2,4
1Department of Surgery, MacKay Memorial Hospital, Taipei, Taiwan.
Journal of Breast Cancer
|March 26, 2025
Summary
Low expression of Zinc finger protein 639 (ZNF639) indicates a better prognosis for breast cancer patients. ZNF639 knockdown promotes tumor growth and metastasis, suggesting its role as a tumor suppressor in breast cancer.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Zinc finger protein 639 (ZNF639) is implicated in esophageal and oral squamous cell carcinomas.
- Its role in breast cancer pathogenesis is currently uncharacterized.
Purpose of the Study:
- To investigate the expression and prognostic significance of ZNF639 in breast cancer.
- To elucidate the functional role of ZNF639 in breast cancer progression and metastasis.
Main Methods:
- Immunohistochemical analysis of ZNF639 expression in breast cancer tissue microarrays.
- Functional assays including colony formation, cell migration, and in vivo metastasis.
- ZNF639 knockdown using small interfering RNA (siRNA) and subsequent gene expression analysis.
Main Results:
- Reduced ZNF639 immunoreactivity was found in 82% of breast cancer samples, irrespective of receptor status.
- Low ZNF639 expression correlated with improved recurrence-free and overall survival.
- ZNF639 knockdown enhanced clonogenicity, cell migration, and lung metastasis, upregulating Snail1, vimentin, and CCL20.
Conclusions:
- ZNF639 functions as a tumor suppressor in breast cancer.
- Low ZNF639 expression is a novel prognostic biomarker for recurrence-free survival in breast cancer patients.
