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- Title
Investigating the effects of acute and chronic stress on DNA damage.
- Authors
Beattie, Ursula K.; Estrada, Rodolfo S.; Gormally, Brenna M. G.; Reed, J. Michael; McVey, Mitch; Romero, L. Michael
- Abstract
A hallmark of the vertebrate stress response is a rapid increase in glucocorticoids and catecholamines; however, this does not mean that these mediators are the best, or should be the only, metric measured when studying stress. Instead, it is becoming increasingly clear that assaying a suite of downstream metrics is necessary in stress physiology. One component of this suite could be assessing double‐stranded DNA damage (dsDNA damage), which has recently been shown to increase in blood with both acute and chronic stress in house sparrows (Passer domesticus). To further understand the relationship between stress and dsDNA damage, we designed two experiments to address the following questions: (1) how does dsDNA damage with chronic stress vary across tissues? (2) does the increase in dsDNA damage during acute stress come from one arm of the stress response or both? We found that (1) dsDNA damage affects tissues differently during chronic stress and (2) the hypothalamic–pituitary–adrenal axis influences dsDNA damage with acute stress, but the sympathetic‐adreno‐medullary system does not. Surprisingly, our data are not explained by studies on changes in hormone receptor levels with chronic stress, so the underlying mechanism remains unclear. Research Highlights: DNA damage is a promising integrative addition to the stress physiologist's toolboxDNA damage increases with chronic stress, but not uniformly across tissuesWith acute stress, corticosterone may have a causal role
- Subjects
PSYCHOLOGICAL stress; DNA damage; ENGLISH sparrow; HORMONE receptors; HYPOTHALAMIC-pituitary-adrenal axis; EXONUCLEASES
- Publication
Journal of Experimental Zoology: Part A Ecological & Integrative Physiology, 2024, Vol 341, Issue 3, p256
- ISSN
2471-5638
- Publication type
Article
- DOI
10.1002/jez.2778