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4.1N suppresses hypoxia-induced epithelial-mesenchymal transition in epithelial ovarian cancer cells
Letian Zhang1, Ajin Hu1, Mengrui Li1
1Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, P.R. China.
Abstract:
Protein 4.1N (4.1N) is a member of the protein 4.1 family and is essential for the regulation of cell adhesion, motility and signaling. Previous studies have suggested that 4.1N may serve a tumor suppressor role. However, the molecular mechanisms remain unclear. In the current study, the role of 4.1N in the downregulation of hypoxia‑induced factor 1α (HIF‑1α) under hypoxic conditions and therefore the suppression of hypoxia induced epithelial‑mesenchymal transition (EMT) was investigated. The data were obtained from overexpressed and knockdown 4.1N epithelial ovarian cancer (EOC) cell lines. It was identified that 4.1N was capable of regulating the sub‑cellular localization and expression levels of HIF‑1α, by which 4.1N served a dominant role in the suppression of hypoxia‑induced EMT and associated genes. Collectively, the data of the current study identified 4.1N as an inhibitor of hypoxia‑induced tumor progression in EOC cells and highlighted its potential role in EOC therapy.
Insights
Protein 4.1N inhibits hypoxia-induced factor 1α (HIF-1α) and epithelial-mesenchymal transition (EMT) in ovarian cancer. This finding reveals Protein 4.1N as a potential therapeutic target for suppressing tumor progression in epithelial ovarian cancer.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- Protein 4.1N (4.1N) is implicated in cell adhesion, motility, and signaling, with suggested tumor suppressor functions.
- The precise molecular mechanisms underlying 4.1N's tumor suppressor role, particularly in epithelial ovarian cancer (EOC), remain largely undefined.
- Hypoxia-induced factor 1α (HIF-1α) and epithelial-mesenchymal transition (EMT) are critical drivers of tumor progression and metastasis in EOC.
Purpose of the Study:
- To investigate the role of Protein 4.1N in regulating hypoxia-induced factor 1α (HIF-1α) and epithelial-mesenchymal transition (EMT) in epithelial ovarian cancer (EOC) cells.
- To elucidate the molecular mechanisms by which 4.1N influences HIF-1α expression and localization under hypoxic conditions.
- To assess the potential of 4.1N as a therapeutic agent for inhibiting hypoxia-driven tumor progression in EOC.
Main Methods:
- Utilized epithelial ovarian cancer (EOC) cell lines with either overexpressed or knockdown Protein 4.1N (4.1N).
- Investigated the impact of 4.1N modulation on the sub-cellular localization and expression levels of hypoxia-induced factor 1α (HIF-1α) under hypoxic conditions.
- Analyzed the effect of 4.1N on hypoxia-induced epithelial-mesenchymal transition (EMT) and associated gene expression.
Main Results:
- Protein 4.1N (4.1N) was found to regulate the sub-cellular localization and expression levels of hypoxia-induced factor 1α (HIF-1α).
- 4.1N demonstrated a significant role in suppressing hypoxia-induced epithelial-mesenchymal transition (EMT) and related genes in EOC cells.
- The study identified 4.1N as a key inhibitor of hypoxia-driven tumor progression in epithelial ovarian cancer.
Conclusions:
- Protein 4.1N acts as an inhibitor of hypoxia-induced tumor progression in epithelial ovarian cancer (EOC) cells.
- 4.1N's mechanism involves the downregulation of hypoxia-induced factor 1α (HIF-1α) and suppression of associated epithelial-mesenchymal transition (EMT).
- These findings highlight Protein 4.1N as a promising therapeutic target for EOC treatment.
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