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- W2034195564 abstract "Mitochondria generate potentially damaging amounts of superoxide and H2O2 during oxidative metabolism. Although many assays are available to measure mitochondrial H2O2 generation, most detect H2O2 that has escaped the organelle. To measure H2O2 within mitochondria that contain catalase, we have developed an assay based on the ability of H2O2 to inhibit catalase in the presence of 3-amino-1,2,4-triazole. The assay is simple to perform, does not require expensive instrumentation, and is specific for H2O2. Results from this assay show that H2O2 generation in rat heart mitochondria reflects the activity of the electron transport chain. Further, liver mitochondria prepared from selenium-deficient rats have increased succinate-stimulated rates of H2O2 generation. This indicates that mitochondrial selenoenzymes are important for H2O2 removal. It also demonstrates the utility of this assay in measuring H2O2 release from mitochondria that do not contain catalase. The assay should be useful for study of both superoxide-dependent H2O2 generation in situ, and the role of endogenous mitochondrial catalase in H2O2 removal." @default.
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- W2034195564 date "2002-05-01" @default.
- W2034195564 modified "2023-10-17" @default.
- W2034195564 title "Catalase-dependent measurement of H2O2 in intact mitochondria" @default.
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- W2034195564 doi "https://doi.org/10.1016/s1567-7249(02)00010-7" @default.
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