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Carbohydrate metabolism changes during cellular senescence. Cytosolic malate dehydrogenase (MDH1) catalyzes the reversible reduction of oxaloacetate to malate at the expense of reduced nicotinamide adenine dinucleotide (NADH). Here, we show that MDH1 plays a critical role in the cellular senescence of human fibroblasts. We observed that the activity of MDH1 was reduced in old human dermal fibroblasts...
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