Dietary Restriction Ameliorates Age-Related Increase in DNA Damage, Senescence and Inflammation in Mouse Adipose Tissuey

Ageing is associated with redistribution of fat around the body and saturation of visceral adipose depots. Likewise, the presence of excess fat in obesity or during ageing places extra stress on visceral depots, resulting in chronic inflammation and increased senescence. This process can contribute...

Full description

Saved in:
Bibliographic Details
Published in:The Journal of nutrition, health & aging health & aging, 2018-04, Vol.22 (4), p.555-561
Main Authors: Ishaq, A., Schröder, J., Edwards, N., von Zglinicki, T., Saretzki, Gabriele
Format: Article
Language:English
Subjects:
Adiposity - physiology
Age Factors
Aging
Aging - physiology
Animals
DNA Damage - genetics
Food Deprivation - physiology
Geriatrics/Gerontology
Inflammation - physiopathology
Intra-Abdominal Fat - physiopathology
Male
Medicine
Medicine & Public Health
Mice
Mice, Inbred C57BL
Neurosciences
Nutrition
Pilot Projects
Primary Care Medicine
Quality of Life Research
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Ageing is associated with redistribution of fat around the body and saturation of visceral adipose depots. Likewise, the presence of excess fat in obesity or during ageing places extra stress on visceral depots, resulting in chronic inflammation and increased senescence. This process can contribute to the establishment of the metabolic syndrome and accelerated ageing. Dietary restriction (DR) is known to alleviate physiological signs of inflammation, ageing and senescence in various tissues including adipose tissue. Objectives Our pilot study aimed to analyse senescence and inflammation parameters in mouse visceral fat tissue during ageing and by short term, late-onset dietary restriction as a nutritional intervention. Design, measurements In this study we used visceral adipose tissue from mice between 5 and 30 months of age and analysed markers of senescence (adipocyte size, γH2A.X, p16, p21) and inflammation (e.g. IL-6, TNFα, IL-1β, macrophage infiltration) using immuno-staining, as well as qPCR for gene expression analysis. Fat tissues from 3 mice per group were analysed. Results We found that the amount of γH2A.X foci as well as the expression of senescence and inflammation markers increased during ageing but decreased with short term DR. In contrast, the increase in amounts of single or aggregated macrophages in fat depots occurred only at higher ages. Surprisingly, we also found that adipocyte size as well as some senescence parameters decreased at very high age (30 months). Conclusions Our results demonstrate increased senescence and inflammation during ageing in mouse visceral fat while DR was able to ameliorate several of these parameters as well as increased adipocyte size at 17.5 months of age. This highlights the health benefits of a decreased nutritional intake over a relatively short period of time at middle age.
ISSN:1279-7707
1760-4788
DOI:10.1007/s12603-017-0968-2