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Detection of Nuclear Blebbing and DNA Leakage in Mammalian Cells by Immunofluorescence
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Lamin A, farnesylation and aging.
1Department of Biochemistry and Molecular Biology, Institute for Genetic Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA.
Experimental Cell Research
|August 30, 2011
Summary
Mutant lamin A protein, progerin, causes Hutchinson-Gilford progeria syndrome (HGPS). Alterations in lamin A processing may also contribute to normal human aging.
Area of Science:
- Cell Biology
- Genetics
- Gerontology
Background:
- Lamin A, a nuclear envelope protein, is processed from a precursor molecule.
- Mutations in the LMNA gene cause laminopathies, including Hutchinson-Gilford progeria syndrome (HGPS).
- HGPS is often caused by a mutation leading to progerin, a permanently farnesylated lamin A.
Purpose of the Study:
- To review the role of progerin in HGPS.
- To discuss how progerin and altered lamin A processing contribute to cellular aging.
- To explore the link between HGPS and normal aging processes.
Main Methods:
- Literature review of studies on lamin A processing, HGPS, and aging.
- Analysis of cellular mechanisms affected by progerin accumulation.
- Discussion of prelamin A processing pathway alterations.
Main Results:
- Progerin accumulation is central to HGPS pathogenesis.
- Altered lamin A processing and farnesylated prelamin A intermediates are implicated in cellular aging.
- Insights into cellular processes affected by progerin provide links to aging.
Conclusions:
- Progerin is a key factor in HGPS.
- Dysregulation of the lamin A processing pathway may contribute to aging in the general population.
- Further research is needed to fully understand the mechanisms linking laminopathies to aging.
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