Abstract
Although DNA damage is intricately linked to metabolism, the metabolic alterations that occur in response to DNA damage are not well understood. We use a DNA repair-deficient model of ERCC1-XPF in Caenorhabditis elegans to gain insights on how genotoxic stress drives aging. Using multi-omic approach, we discover that nuclear DNA damage promotes mitochondrial β-oxidation and drives a global loss of fat depots. This metabolic shift to β-oxidation generates acetyl-coenzyme A to promote histone hyperacetylation and an associated change in expression of immune-effector and cytochrome genes. We identify the histone acetyltransferase MYS-1, as a critical regulator of this metabolic-epigenetic axis. We show that in response to DNA damage, polyunsaturated fatty acids, especially arachidonic acid (AA) and AA-related lipid mediators, are elevated and this is dependent on mys-1. Together, these findings reveal that DNA damage alters the metabolic-epigenetic axis to drive an immune-like response that can promote age-associated decline.
Original language | English |
---|---|
Article number | eabl6083 |
Pages (from-to) | eabl6083 |
Journal | Science Advances |
Volume | 8 |
Issue number | 7 |
DOIs | |
State | Published - Feb 18 2022 |
Keywords
- Animals
- Caenorhabditis elegans/genetics
- DNA Damage
- DNA Repair
- Histones/metabolism
- Lipid Metabolism