Related Experiment Video
Updated: Jun 25, 2025
In vitro Organoid Culture of Primary Mouse Colon Tumors
Published on: May 17, 2013
KLF4 Induces Colorectal Cancer by Promoting EMT via STAT3 Activation
Lebin Yuan1, Yanqiu Meng2, Jiajia Xiang3
1Department of Nail and Breast Surgery, Affiliated Xiangyang Central Hospital of Hubei University of Arts and Science, Xiangyang Center Hospital, Xiangyang, Hubei, China.
Objective:
Krüppel-like factor 4 (KLF4) has been demonstrated to exert a pro-carcinogenic effect in solid tissues. However, the precise biological function and underlying mechanisms in colorectal cancer (CRC) remains elucidated.
Aims:
To investigate whether KLF4 participates in the proliferation and invasion of CRC.
Methods:
The expression of KLF4 was investigated using immunohistochemistry and immunoblotting. The clinical significance of KLF4 was evaluated. Furthermore, the effect of inhibiting or overexpressing KLF4 on tumor was examined. Immunoblotting and qPCR were used to detect Epithelial-mesenchymal transition-related proteins levels. Additionally, the molecular function of KLF4 is related to the STAT3 signaling pathway and was determined through JASPAR, GSEA analysis, and in vitro experiments.
Results:
KLF4 exhibits down-regulated expression in CRC and is part of the vessel invasion, TNM stage, and worse prognosis. In vitro studies have shown that KLF4 promotes cellular proliferation and invasion, as well as EMT processes. Xenograft tumor models confirmed the oncogenic role of KLF4 in nude mice. Furthermore, GSEA and JASPAR databases analysis reveal that the binding of KLF4 to the signal transducer and activator of transcription 3 (STAT3) promoter site induces activation of p-STAT3 signaling. Subsequent targeting of STAT3 confirmed its pivotal role in mediating the oncogenic effects exerted by KLF4.
Conclusion:
The study suggests that KLF4 activates STAT3 signaling, inducing epithelial-mesenchymal transition, thereby promoting CRC progression.
Insights
Krüppel-like factor 4 (KLF4) promotes colorectal cancer (CRC) progression by activating STAT3 signaling, leading to increased proliferation, invasion, and epithelial-mesenchymal transition (EMT). This study elucidates KLF4
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Krüppel-like factor 4 (KLF4) is implicated in solid tissue carcinogenesis.
- Its specific role and mechanisms in colorectal cancer (CRC) require further elucidation.
Purpose of the Study:
- To investigate the role of KLF4 in CRC proliferation and invasion.
- To explore the underlying molecular mechanisms involving KLF4 in CRC progression.
Main Methods:
- Immunohistochemistry and immunoblotting to assess KLF4 expression and clinical significance.
- In vitro and xenograft models to examine KLF4's effect on tumor growth, proliferation, invasion, and epithelial-mesenchymal transition (EMT).
- Bioinformatic analyses (JASPAR, GSEA) and molecular experiments to determine KLF4's interaction with the STAT3 signaling pathway.
Main Results:
- KLF4 expression is downregulated in CRC and correlates with vessel invasion, advanced TNM stage, and poorer prognosis.
- KLF4 overexpression promotes CRC cell proliferation, invasion, and EMT.
- KLF4 activates STAT3 signaling by binding to its promoter, which mediates KLF4's oncogenic effects.
Conclusions:
- KLF4 plays a significant role in promoting CRC progression.
- KLF4 activates STAT3 signaling, driving EMT and enhancing tumor aggressiveness.
- Targeting KLF4 or STAT3 may offer therapeutic strategies for CRC.
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