Krüppel-Like Factor 4, a Hub Gate for Cell Crosstalk in Tumor Microenvironment

Area of Science:

• Oncology
• Molecular Biology
• Cancer Research

Background:

• Krüppel-like factor 4 (KLF4) is a transcription factor with context-dependent roles in cancer.
• KLF4 can function as either a tumor suppressor or an oncogene.
• Its intricate roles within the tumor microenvironment (TME) are critical for cancer progression.

Purpose of the Study:

• To comprehensively review the multifaceted roles of KLF4 within the TME.
• To evaluate KLF4 as a potential therapeutic target in oncology.
• To understand KLF4's orchestration of cell crosstalk in the TME.

Main Methods:

• Comprehensive literature review.
• Analysis of KLF4 expression patterns and regulatory mechanisms.
• Investigation of KLF4 functions across various TME components (cancer cells, immune cells, fibroblasts, etc.).

Main Results:

• KLF4 exhibits opposing roles: tumor suppressor in gastric, lung, and pancreatic cancers; oncogene in breast, colorectal, and prostate cancers.
• KLF4 regulates macrophage polarization, T-cell exhaustion, NK cell activity, and myeloid-derived suppressor cell recruitment.
• KLF4 influences cancer-associated fibroblast activation and extracellular matrix remodeling, with expression modulated by miRNAs, lncRNAs, and epigenetics.

Conclusions:

• KLF4 acts as a central regulator of intercellular communication within the TME.
• Understanding KLF4's context-specific functions is key to developing precision oncology therapies.
• Emerging KLF4-targeting agents show promise in preclinical and early clinical settings.