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- W2134160865 abstract "Cell death plays a pivotal role in the body to maintain homeostasis during aging. Studies have shown that damaged cells, which must be removed from the body, accumulate during aging. Decay of the capacity and/or control of cell death during aging is widely considered to be involved in some age-dependent diseases. We investigated the accumulation of protein carbonyls and the role of cell death induced by hydrogen peroxide in human fibroblasts from individuals of various ages (17–80 years). The results showed that levels of oxidatively modified proteins increased with age, not only in whole-cell lysates but also in mitochondrial fractions, and this change correlates with a decline in the intracellular ATP level. Exposure of fibroblasts to hydrogen peroxide led to cell death by apoptosis and necrosis. Younger (<60 years old) cells were more resistant to necrosis induced by hydrogen peroxide than were older cells (>60 years old), which contained lower levels of free ATP than did younger cells. Treatment of cells of all ages with inhibitors of ATP synthesis (oligomycin, 2,4-dinitrophenol, or 2-deoxyglucose) made them more susceptible to cell death but also led to a switch in the death mode from apoptosis to necrosis. Furthermore, hydrogen peroxide treatment led to a greater accumulation of several inflammatory cytokines (IL-6, IL-7, IL-16, and IL-17) and increased necrosis in older cells. These results suggest that age-related decline in the ATP level reduces the capacity to induce apoptosis and promotes necrotic inflammation. This switch may trigger a number of age-dependent disorders." @default.
- W2134160865 created "2016-06-24" @default.
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- W2134160865 date "2006-01-27" @default.
- W2134160865 modified "2023-10-16" @default.
- W2134160865 title "Age-dependent cell death and the role of ATP in hydrogen peroxide-induced apoptosis and necrosis" @default.
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- W2134160865 doi "https://doi.org/10.1073/pnas.0510346103" @default.
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