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An E2F1/DDX11/EZH2 Positive Feedback Loop Promotes Cell Proliferation in Hepatocellular Carcinoma
Shu-Guang Su1, Qiu-Li Li2, Mei-Fang Zhang3
1Department of Pathology, The Affiliated Hexian Memorial Hospital of Southern Medical University, Guangzhou, China.
Frontiers in Oncology
|February 22, 2021
Summary
Hepatocellular carcinoma (HCC) involves gene instability. DDX11, a DNA helicase, drives HCC growth by interacting with EZH2 to suppress p21, indicating its role as an oncogene and prognostic marker.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Hepatocellular carcinoma (HCC) is a major cause of cancer death, linked to genome instability.
- The role of DNA helicase DDX11 in HCC progression remains unclear.
Purpose of the Study:
- To investigate the clinical value and biological function of DDX11 in HCC.
- To elucidate the mechanism by which DDX11 influences HCC progression.
Main Methods:
- Analysis of DDX11 expression in HCC patient cohorts.
- Assessment of DDX11's impact on HCC cell viability and cell cycle.
- Investigation of DDX11's interaction with EZH2 and its effect on p21 expression.
- Identification of upstream regulators of DDX11.
Main Results:
- DDX11 is upregulated in HCC and correlates with poor patient outcomes.
- DDX11 overexpression enhances HCC cell viability and colony formation.
- DDX11 interacts with EZH2, protecting it from degradation and downregulating p21.
- E2F1 acts as an upstream regulator, forming a positive feedback loop with EZH2 to promote DDX11 expression and cell proliferation.
Conclusions:
- DDX11 acts as an oncogene in HCC through the EZH2/p21 signaling pathway.
- A positive feedback loop involving E2F1, DDX11, and EZH2 drives HCC proliferation.
- DDX11 is a potential prognostic biomarker for HCC.
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