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- W2892224459 abstract "Aim. To study the effect of non-selective inhibitor of NO-synthase N-nitro-L-arginine methyl ester (L-NAME) and substrate of nitric oxide synthesis L-arginine on the activity of cathepsins B, L, H and its subcellular distribution in liver, kidney and lung tissues. Materials and methods. The object of study – male rats Wistar line, the material was the cytoplasmic and lysosomal fraction of homogenates of liver, kidney, lung tissues. A non-selective inhibitor of inducible NO-synthase N-nitro-L-arginine methyl ester (L-NAME) was applied at a dose of 25 mg/kg, the substrate of NO synthesis L-arginine – at a dose of 500 mg/kg. Activity of cathepsins B, L, H was defined separately in the cytoplasmic and lysosomal fractions by spectrofluorometry quantitative determination of the specific substrate cleavage product 7-amido-4-methylcoumarin. Results. Suppression of nitric oxide synthesis by non-selective inhibitor of NO-synthase L-NAME (25 mg/kg, 7 days) in the kidney tissue leads to a decrease in the activity of cathepsins В, L, H in lysosomal fraction with a parallel increase in non-lysosomal activity of cathepsin L, in the liver tissue leads to an increase in lysosomal activity of cathepsin H and a decrease in non-lysosomal activity of cathepsin L. The substrate of nitric oxide synthesis L-arginine (500 mg/kg, 10 days) only causes increased activity of cathepsin L in non-lysosomal fraction of liver tissue, leads to increased lysosomal activity of cathepsin H in kidney tissue, the lung tissue shows a significant increase in the activity of the all studied cathepsins in non-lysosomal fraction, accompanied by an increase in lysosomal activity of cathepsins B and H. The revealed changes are associated with the signs of changes in the ratio of pro-enzyme and active forms of cathepsins. Conclusion. The effects of non-selective inhibitor and substrate of nitric oxide synthesis on the total activity of cathepsins B, L and H in parenchymatous organs and its subcellular distribution are tissue-specific and multidirectional in some cases and are accompanied by signs of changes in the ratio of pro-enzyme and enzymatically active forms mainly due to an increase of pro-enzyme forms." @default.
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- W2892224459 date "2018-09-09" @default.
- W2892224459 modified "2023-09-25" @default.
- W2892224459 title "Сhanges in subcellular distribution of lysosomal cysteine proteinases activity in parenchymatous organs of rats under the action of nitric oxide synthesis modulators" @default.
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- W2892224459 doi "https://doi.org/10.17709/2409-2231-2018-5-3-3" @default.
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