Lamin A and telomere maintenance in aging: Two to Tango

Area of Science:

• Cell Biology
• Genetics
• Gerontology

Background:

• Nuclear lamina, composed of lamin proteins (A and B types), provides structural support to the nucleus in eukaryotes.
• Mutations in LMNA gene cause laminopathies, including progeria, characterized by premature aging due to defective lamin A processing and progerin accumulation.
• Cellular senescence, a hallmark of aging, involves genomic instability and telomere attrition, potentially linked to nuclear lamina organization defects.

Approach:

• This review synthesizes current research on the relationship between lamin proteins, nuclear architecture, and aging processes.
• It examines the role of progerin, a toxic lamin A variant, in accelerated aging syndromes.
• The interplay between telomere dynamics and nuclear lamina function in both physiological and premature aging is discussed.

Key Points:

• Defective nuclear lamina organization contributes to cellular senescence and aging phenotypes.
• Progerin accumulation, a result of LMNA gene mutations, drives progeroid laminopathies.
• Telomere dysfunction and loss of genomic integrity are common features in aging and progeria, linked to nuclear lamina defects.

Conclusions:

• The nuclear lamina plays a critical role in maintaining genomic stability and cellular health during aging.
• Understanding the telomere-lamina interplay offers insights into therapeutic strategies for aging and laminopathies.
• Further research into nuclear lamina function is essential for elucidating aging mechanisms.