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Mol Nutr Food Res. 2019 May 29:e1900045. doi: 10.1002/mnfr.201900045. [Epub ahead of print]

Impact of Weight Loss Strategies on Obesity-Induced DNA Damage.

Author information

1
Department of Internal Medicine I, Institute of Cancer Research, Medical University of Vienna, Vienna, Austria.
2
VITO-Health, Mol, Belgium.
3
Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium.
4
Department of Pharmacology & Toxicology, School for Nutrition, Toxicology and Metabolism (NUTRIM), Maastricht University, Maastricht, The Netherlands.
5
Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria.
6
Section of Endocrine Surgery, Division of General Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria.
7
Clinical Institute of Pathology, Medical University of Vienna, Vienna, Austria.
8
Department of Nutritional Sciences, University of Vienna, Vienna, Austria.

Abstract

SCOPE:

Obesity causes DNA damage, which is causally related to several disorders including cancer, infertility, and cognitive dysfunctions. The aim of this study is to investigate whether weight loss improves the integrity of the genetic material.

METHODS AND RESULTS:

Overweight mice are fed ad libitum either with a Western diet (WD), with a 40% caloric restricted WD, or with a high carbohydrate low protein (HCLP) diet. Caloric restriction and also the HCLP diet lead to ca. 30% weight loss, which is paralleled by decreased DNA damage ("comet" formation) and oxidative damage of purines in inner organs, additionally the activity of nucleotide excision repair increased. The effects are more pronounced in animals that have received the HCLP chow. Results of biochemical analyses indicate that the reduction of DNA damage is associated with a decrease of pro-inflammatory cytokines and lower insulin levels.

CONCLUSION:

The study indicates that weight loss may prevent obesity-associated adverse health effects due to reduction of overall DNA damage.

KEYWORDS:

DNA damage; DNA repair; Western diet; inflammation; weight loss

PMID:
31141317
DOI:
10.1002/mnfr.201900045

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