Format

Send to

Choose Destination
Genome Biol. 2017 Mar 28;18(1):56. doi: 10.1186/s13059-017-1187-1.

Dietary restriction protects from age-associated DNA methylation and induces epigenetic reprogramming of lipid metabolism.

Author information

1
Max Planck Institute for Biology of Ageing, 50931, Cologne, Germany.
2
Cellular Networks and Systems Biology, CECAD, University of Cologne, Joseph-Stelzmann-Str. 26, Cologne, 50931, Germany.
3
Epigenetics Programme, The Babraham Institute, Cambridge, CB22 3AT, UK.
4
Barts Cancer Institute, Queen Mary University of London, London, EC1M 6BQ, UK.
5
Bioinformatics Group, The Babraham Institute, Cambridge, CB22 3AT, UK.
6
Inositide Lab, The Babraham Institute, Cambridge, CB22 3AT, UK.
7
Cellular Networks and Systems Biology, CECAD, University of Cologne, Joseph-Stelzmann-Str. 26, Cologne, 50931, Germany. andreas.beyer@uni-koeln.de.
8
Center for Molecular Medicine Cologne, University of Cologne, Cologne, 50931, Germany. andreas.beyer@uni-koeln.de.
9
Epigenetics Programme, The Babraham Institute, Cambridge, CB22 3AT, UK. wolf.reik@babraham.ac.uk.
10
The Wellcome Trust Sanger Institute, Cambridge, CB10 1SA, UK. wolf.reik@babraham.ac.uk.
11
Max Planck Institute for Biology of Ageing, 50931, Cologne, Germany. Partridge@age.mpg.de.
12
Department of Genetics, Evolution and Environment, Institute of Healthy Ageing, University College London, London, WC1E 6BT, UK. Partridge@age.mpg.de.

Abstract

BACKGROUND:

Dietary restriction (DR), a reduction in food intake without malnutrition, increases most aspects of health during aging and extends lifespan in diverse species, including rodents. However, the mechanisms by which DR interacts with the aging process to improve health in old age are poorly understood. DNA methylation could play an important role in mediating the effects of DR because it is sensitive to the effects of nutrition and can affect gene expression memory over time.

RESULTS:

Here, we profile genome-wide changes in DNA methylation, gene expression and lipidomics in response to DR and aging in female mouse liver. DR is generally strongly protective against age-related changes in DNA methylation. During aging with DR, DNA methylation becomes targeted to gene bodies and is associated with reduced gene expression, particularly of genes involved in lipid metabolism. The lipid profile of the livers of DR mice is correspondingly shifted towards lowered triglyceride content and shorter chain length of triglyceride-associated fatty acids, and these effects become more pronounced with age.

CONCLUSIONS:

Our results indicate that DR remodels genome-wide patterns of DNA methylation so that age-related changes are profoundly delayed, while changes at loci involved in lipid metabolism affect gene expression and the resulting lipid profile.

PMID:
28351387
PMCID:
PMC5370449
DOI:
10.1186/s13059-017-1187-1
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for BioMed Central Icon for PubMed Central
Loading ...
Support Center