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- W3010280425 abstract "The aim Was to study the role of post-translational modifications of cofilin in the regulation of respiration and autophagy in murine brain mitochondria.The experiments were performed with C57BL/6 mice. To obtain cytoplasmic and mitochondrial fractions of the brain tissue, differential centrifugation was used. Expressions of cofilin, phospho-cofilin, K48- and K63-associated chains of ubiquitin, and the autophagy marker LC3B were determined using electrophoresis, immunoprecipitation and Western blot methods. To study the processes of ubiquitination, we used PR619 - the inhibitor of deubiquitinating enzymes. Respiratory activity of brain mitochondria was evaluated using high-resolution fluorespirometry.Modification of cofilin by non-canonical K63 multiubiquitin chains in the cytoplasm and mitochondria from murine brain was demonstrated. Different levels of phospho-cofilin, cofilin, and its ubiquitinated proteoforms were found. PR619, the inhibitor of deubiquitinating enzymes, affects the expression of phosphorylated and ubiquitinated forms of cofilin in the mitochondria and cytoplasm, at the same time it changes the activity of tissue respiration and mitophagy.The sensitivity of cofilin to the inhibitor of deubiquitinating enzymes indicates the existence of a new non-catabolic mechanism of cofilin modification, which may be involved in the regulation of mitochondrial functions, specifically, the mitochondrial respiration and autophagy. The data help understand the molecular mechanisms of mitochondrial function in normal and pathological conditions, which may be useful in developing novel methods for the treatment of diseases of the nervous system." @default.
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- W3010280425 date "2020-02-01" @default.
- W3010280425 modified "2023-09-27" @default.
- W3010280425 title "A New Cofilin-Dependent Mechanism for the Regulation of Brain Mitochondria Biogenesis and Degradation" @default.
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- W3010280425 doi "https://doi.org/10.17691/stm2020.12.1.01" @default.
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