FOXO3: A Major Gene for Human Longevity--A Mini-Review

Area of Science:

• Genetics and Molecular Biology
• Aging Research
• Cellular Biology

Background:

• The FOXO3 gene is a key determinant of longevity, with polymorphisms consistently associated with extended lifespan across diverse populations.
• FOXO3 encodes a transcription factor crucial for cellular regulation and healthspan.

Purpose of the Study:

• To review the multifaceted roles of FOXO3 in health, healthy aging, and longevity.
• To elucidate the molecular mechanisms underlying FOXO3's impact on lifespan.

Main Methods:

• Comprehensive literature search of PubMed using "FOXO3" as the primary keyword.
• Synthesis of existing research on FOXO3's genetic associations and functional roles.

Main Results:

• FOXO3 regulates critical pathways including energy metabolism, oxidative stress response, proteostasis, apoptosis, cell cycle, immunity, and stem cell maintenance.
• While a single FoxO confers immortality in simpler organisms, mammalian FOXO subtypes, particularly FOXO3, manage diverse specialized pathways.
• FOXO3's core functions involve maintaining cellular homeostasis, regulating stem cells, and modulating inflammation, a key factor in age-related diseases.

Conclusions:

• Understanding how FOXO3 variants influence age-related mortality is of significant clinical interest.
• Optimizing FOXO3 activity presents a promising strategy for increasing human lifespan and mitigating age-related diseases.
• Further research and development of therapeutic agents targeting the FOXO3 pathway are encouraged.