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- W2113216706 abstract "Many theories have been advanced to account for the ageing process, among which the free radical theory deserves much attention. Numerous studies have also shown an association between tissue fibrosis and oxidative stress. Of note, fibrosis may be considered a significant index of tissue ageing. Calorie restriction (CR) has been demonstrated to maintain many physiological processes in a youthful state until a very advanced age. However the anti-ageing mechanisms of CR are still not fully understood. We thus evaluated the effect of CR on oxidative damage and its relationship with fibrosis during ageing. We found a significant increase of both oxidative stress and fibrosis parameters in the aortae from aged vs. young rats. CR reversed both phenomena. CR also protected against the age-associated increase of Jun-N-terminal kinase and p-38 activities, involved in TGFbeta1 expression and signaling. On the contrary, extracellular regulated kinases did not show any age-related change. CR similarly reversed the age-related increase of AP-1 DNA binding activity and the AP-1-dependent increase of vimentin gene expression. In parallel, CR reversed the age-related morphological alterations of the aorta wall cell composition. These data further support the relationship between oxidative stress and fibrosis in different diseases and during ageing. The protection exerted by CR against fibrosclerosis might be due to a decrease of oxidative stress, with consequent decreased MAPK activity and down-regulation of AP-1 activation and of TGFbeta1 expression and signaling." @default.
- W2113216706 created "2016-06-24" @default.
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- W2113216706 date "2005-09-08" @default.
- W2113216706 modified "2023-09-23" @default.
- W2113216706 title "Calorie restriction protects against age‐related rat aorta sclerosis" @default.
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- W2113216706 doi "https://doi.org/10.1096/fj.04-2864fje" @default.
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