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Solid Plate-based Dietary Restriction in Caenorhabditis elegans
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Splicing factor 1 modulates dietary restriction and TORC1 pathway longevity in C. elegans
Caroline Heintz1, Thomas Koed Doktor2, Anne Lanjuin1
1Department of Genetics and Complex Diseases, Harvard T. H. Chan School of Public Health, Boston, MA 02115, USA.
Nature
|December 6, 2016
Summary
Maintaining RNA splicing homeostasis predicts lifespan in aging worms. Dietary restriction improves splicing and extends life by regulating splicing factor 1 (SFA-1), suggesting spliceosome modulation may promote healthy aging.
Area of Science:
- Molecular Biology
- Genetics
- Gerontology
Background:
- Aging leads to loss of homeostasis, increasing chronic disease risk.
- Pre-mRNA splicing is crucial for gene expression; its deregulation links to age-related diseases.
- The role of splicing homeostasis in healthy aging is not well understood.
Purpose of the Study:
- To investigate the role of pre-mRNA splicing homeostasis in aging and lifespan.
- To determine if splicing homeostasis is a biomarker for life expectancy.
- To explore the mechanisms by which dietary restriction impacts splicing and longevity.
Main Methods:
- Transcriptomic and splicing analysis in young and old Caenorhabditis elegans.
- Comparison of animals under ad libitum feeding versus dietary restriction.
- Genetic manipulation of splicing factor 1 (SFA-1) and TORC1 pathway components.
Main Results:
- Pre-mRNA splicing homeostasis declines with age in C. elegans.
- Dietary restriction reduces splicing defects and extends lifespan, dependent on SFA-1.
- SFA-1 is essential for lifespan extension induced by dietary restriction and TORC1 pathway modulation.
- Overexpression of SFA-1 alone is sufficient to increase lifespan.
Conclusions:
- Pre-mRNA splicing homeostasis is a biomarker and predictor of lifespan.
- SFA-1 plays a critical role in mediating the longevity benefits of dietary restriction.
- Targeting spliceosome components like SFA-1 may offer strategies for promoting healthy aging.
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