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Molecular markers of DNA repair and brain metabolism correlate with cognition in centenarians
被引:0
作者:
Ines Sanchez-Roman
Beatriz Ferrando
Camilla Myrup Holst
Jonas Mengel-From
Signe Høi Rasmussen
Mikael Thinggaard
Vilhelm A. Bohr
Kaare Christensen
Tinna Stevnsner
机构:
[1] Aarhus University,Department of Molecular Biology and Genetics
[2] Danish Aging Research Center,Department of Genetics, Physiology and Microbiology, Faculty of Biological Sciences (Animal Physiology Unit), School of Biology
[3] Complutense University of Madrid,Epidemiology, Biostatistics and Biodemography
[4] University of Southern Denmark,Department of Geriatrics
[5] Odense University Hospital,undefined
[6] National Institute On Aging,undefined
[7] NIH,undefined
来源:
GeroScience
|
2022年
/
44卷
关键词:
Centenarians;
Cognition;
Mitochondria;
Oxidative stress;
DNA maintenance;
D O I:
暂无
中图分类号:
学科分类号:
摘要:
Oxidative stress is an important factor in age-associated neurodegeneration. Accordingly, mitochondrial dysfunction and genomic instability have been considered as key hallmarks of aging and have important roles in age-associated cognitive decline and neurodegenerative disorders. In order to evaluate whether maintenance of cognitive abilities at very old age is associated with key hallmarks of aging, we measured mitochondrial bioenergetics, mitochondrial DNA copy number and DNA repair capacity in peripheral blood mononuclear cells from centenarians in a Danish 1915 birth cohort (n = 120). Also, the circulating levels of brain-derived neurotrophic factor, NAD+ /NADH and carbonylated proteins were measured in plasma of the centenarians and correlated to cognitive capacity. Mitochondrial respiration was well preserved in the centenarian cohort when compared to young individuals (21–35 years of age, n = 33). When correlating cognitive performance of the centenarians with mitochondrial function such as basal respiration, ATP production, reserve capacity and maximal respiration, no overall correlations were observed, but when stratifying by sex, inverse associations were observed in the males (p < 0.05). Centenarians with the most severe cognitive impairment displayed the lowest activity of the central DNA repair enzyme, APE1 (p < 0.05). A positive correlation between cognitive capacity and levels of NAD+ /NADH was observed (p < 0.05), which may be because NAD+ /NADH consuming enzyme activities strive to reduce the oxidative DNA damage load. Also, circulating protein carbonylation was lowest in centenarians with highest cognitive capacity (p < 0.05). An opposite trend was observed for levels of brain-derived neurotrophic factor (p = 0.17). Our results suggest that maintenance of cognitive capacity at very old age may be associated with cellular mechanisms related to oxidative stress and DNA metabolism.
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页码:103 / 125
页数:22
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