FOXO transcription factors in cancer development and therapy

Area of Science:

• Oncology
• Molecular Biology
• Gene Regulation

Background:

• Forkhead box O (FOXO) transcription factors are recognized as tumor suppressors, inhibiting cell proliferation and inducing apoptosis.
• FOXO gene alterations are found in specific human cancers like leukemia and lymphoma.
• Oncogenic pathways (PI3K, MAP kinases) and microRNAs inactivate FOXO proteins, impacting cancer development.

Purpose of the Study:

• To review the multifaceted roles of FOXO transcription factors in cancer development.
• To explore the paradoxical functions of FOXOs in cancer progression and therapeutic responses.
• To discuss the implications of FOXO activity in treatment resistance and metastasis.

Main Methods:

• Literature review of studies on FOXO transcription factors in various cancer types.
• Analysis of molecular mechanisms underlying FOXO inactivation and activation in cancer.
• Synthesis of evidence regarding FOXO's dual role as tumor suppressor and promoter.

Main Results:

• FOXO proteins are inactivated by oncogenic signaling and microRNAs.
• FOXO alterations are linked to specific cancers, including leukemia and lymphoma.
• Paradoxical roles include promoting leukemia-initiating cells, invasion, metastasis, and treatment resistance.

Conclusions:

• FOXO transcription factors exhibit complex and context-dependent roles in cancer.
• Understanding FOXO's dual function is crucial for developing effective cancer therapies.
• Further research is needed to elucidate FOXO's precise involvement in tumorigenesis and treatment outcomes.