Nucleophagy delays aging and preserves germline immortality

Area of Science:

• Cellular Biology
• Aging Research
• Genetics

Background:

• Nuclear ultrastructure changes are hallmarks of aging and age-related diseases.
• Autophagy plays a critical role in cellular maintenance and homeostasis.

Purpose of the Study:

• To investigate the role of nuclear protein autophagy in aging and fertility.
• To identify conserved mechanisms of germline immortality and somatic longevity.

Main Methods:

• Studied autophagy of nuclear proteins in Caenorhabditis elegans and mice.
• Investigated the function of ANC-1 and nesprin-2 in nuclear clearance and nucleolar size regulation.
• Analyzed the impact of perturbing autophagic pathways on stress resistance, longevity, and tumor formation.

Main Results:

• Autophagy of nuclear proteins, including ANC-1 and nesprin-2, is essential for fertility, stress resistance, germline immortality, and longevity.
• ANC-1 and nesprin-2 restrict nucleolar size, a biomarker of aging.
• Impairment of this autophagic pathway leads to tumor-like structures in C. elegans and ovarian carcinomas in mice.

Conclusions:

• Autophagic recycling of nuclear components is a conserved mechanism for somatic longevity and germline immortality.
• This process promotes youthfulness and delays aging, particularly under stress conditions.
• Targeting nuclear autophagy may offer therapeutic strategies for age-related pathologies.