Abstract:
BACKGROUND:Oxidative stress is strongly associated with aging and age-related diseases and plays a crucial role in endothelial dysfunction development. AIM:To better understand the molecular mechanisms of aging and stress response in humans, we examined changes to young and older human endothelial cells over time (72, 96 and 120 h), before and after H2O2-induced stress. METHODS:We measured the expression of the deacetylase Sirtuin 1 (Sirt1) and its transcriptional target Forkhead box O3a (Foxo3a); TBARS, a well-known marker of overall oxidative stress, and catalase activity as index of antioxidation. Moreover, we quantified levels of cellular senescence by senescence-associated β galactosidase (SA-βgal) assay. RESULTS:Under oxidative stress induction older cells showed a progressive decrease of Sirt1 and Foxo3a expression, persistently high TBARS levels with high, but ineffective Cat activity to counteract such levels. In addition cellular senescence drastically increased in older cells compared with Young cells both in presence and in the absence of oxidative stress. DISCUSSION:By following the cell behavior during the time course, we can hypothesize that while in young cells an oxidative stress induction stimulated an adequate response through activation of molecular factor crucial to counteract oxidative stress, the older cells are not able to adequately adapt themselves to external stress stimuli. CONCLUSIONS:During their life, endothelial cells impair the ability to defend themselves from oxidative stress stimuli. This dysfunction involves the pathway of Sirt1 a critical regulator of oxidative stress response and cellular lifespan, underlining its crucial role in endothelial homeostasis control during aging and age-associated diseases.
journal_name
Aging Clin Exp Resjournal_title
Aging clinical and experimental researchauthors
Conti V,Corbi G,Simeon V,Russomanno G,Manzo V,Ferrara N,Filippelli Adoi
10.1007/s40520-015-0357-9subject
Has Abstractpub_date
2015-08-01 00:00:00pages
547-53issue
4eissn
1594-0667issn
1720-8319journal_volume
27pub_type
杂志文章abstract:AIMS:The aim of this pilot study was to examine the effect of a home-made oral supplement on body weight and energy intake of old people residing in a nursing home. METHODS:Sixty-six old (65+ years) nursing home residents were included and divided into three classes according to their Mini Nutritional Assessment (MNA)...
journal_title:Aging clinical and experimental research
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Aging clinical and experimental research
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journal_title:Aging clinical and experimental research
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journal_title:Aging clinical and experimental research
pub_type: 杂志文章
doi:10.1007/BF03337744
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abstract:OBJECTIVE:Given the impact of recurrent falls in older people, risk evaluation for falling is an important part of geriatric assessment. Available clinical tools usually do not include patients' self-perceived risk of falling. The objective of this study was to evaluate association with and predictive capacity of self-...
journal_title:Aging clinical and experimental research
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doi:10.1007/s40520-013-0130-x
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journal_title:Aging clinical and experimental research
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journal_title:Aging clinical and experimental research
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doi:10.1007/s40520-014-0236-9
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journal_title:Aging clinical and experimental research
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doi:10.1007/BF03324868
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journal_title:Aging clinical and experimental research
pub_type: 杂志文章,评审
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journal_title:Aging clinical and experimental research
pub_type: 杂志文章
doi:10.1007/s40520-013-0025-x
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doi:10.1007/BF03324463
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journal_title:Aging clinical and experimental research
pub_type: 杂志文章
doi:10.1007/s40520-018-1036-4
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journal_title:Aging clinical and experimental research
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pub_type: 杂志文章,收录出版
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journal_title:Aging clinical and experimental research
pub_type: 杂志文章,多中心研究
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journal_title:Aging clinical and experimental research
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Aging clinical and experimental research
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journal_title:Aging clinical and experimental research
pub_type: 杂志文章
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journal_title:Aging clinical and experimental research
pub_type: 杂志文章
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