A new fork for clinical application: targeting forkhead transcription factors in cancer

Area of Science:

• Molecular Biology
• Cell Biology
• Oncology

Background:

• Forkhead O (FOXO) transcription factors are critical regulators of cellular processes like cell cycle arrest, apoptosis, and stress response.
• Dysregulation of FOXO activity, often due to phosphorylation by survival pathways (e.g., PI3K/AKT), leads to nuclear exclusion and degradation, suppressing their tumor-suppressive functions.
• Inactivation of FOXO proteins is linked to various cancers, including breast, prostate, and leukemia.

Purpose of the Study:

• To review recent findings on the novel functions of FOXO transcription factors.
• To highlight the role of FOXOs in tumorigenesis and cancer progression.
• To emphasize FOXOs as potential therapeutic targets for a wide range of cancers.

Main Methods:

• Literature review of recent studies on FOXO transcription factors.
• Analysis of the role of FOXO signaling in cell cycle regulation, apoptosis, and DNA damage response.
• Examination of the association between FOXO inactivation and various types of cancer.
• Review of evidence linking clinically used drugs to FOXO activation.

Main Results:

• FOXO proteins are essential for maintaining cellular homeostasis and preventing uncontrolled proliferation.
• Loss or inactivation of FOXO function is a common event in tumorigenesis across multiple cancer types.
• Several established cancer therapeutics exert their effects through the activation of FOXO3a and its downstream targets.

Conclusions:

• Active FOXO proteins are crucial for tumor suppression.
• Targeting FOXO signaling represents a promising therapeutic strategy for diverse cancers.
• Further research into FOXO functions may uncover new avenues for cancer treatment.