Methemoglobin reductase activity of nuclear erythrocytes of the sea ruff (Scorpaena porcus, Linnaeus, 1758) under normal and oxidative stress conditions (in vitro experiments)
- Autores: Soldatov A.A.1,2, Shalagina N.T.1, Rychkova V.N.1, Kukhareva T.A.1
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Afiliações:
- Federal Research Center “A.O. Kovalevsky Institute of Biology of the South Seas of the Russian Academy of Sciences”
- Sevastopol State University
- Edição: Nº 1 (2025)
- Páginas: 16-23
- Seção: BIOCHEMISTRY
- URL: https://journals.rcsi.science/1026-3470/article/view/286990
- DOI: https://doi.org/10.31857/S1026347025010022
- ID: 286990
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Resumo
A method for evaluating the methemoglobin reductase activity of nuclear erythrocytes of teleost fish is proposed. The work was performed on a bottom marine species (Scorpaena porcus, Linnaeus, 1758). In an in vitro experiment, the erythrocyte suspension of this type was weighed in solutions with different concentrations of NaNO2, after washing from this compound, the process of methemoglobin (MetHb) reduction was studied for 150 min. The functional state of hemoglobin was judged by the results of spectral analysis. The study of the kinetics of MetHb reduction showed that the dependence was well described by the equation of an exponential function with a coefficient of determination (R2) greater than 0.9. The nature of the dependence remained at different levels of oxidative stress. This made it possible to calculate the velocity constant of the first order k (25 oC). In this species, it was 5.75–6.45 (10–3) min–1, which slightly exceeded the known values for mammals, and was close to the data obtained for other species of bony fish. It was found that the MetHb-reductase activity of the nuclear erythrocytes of the sea ruff increased with a rise in the oxidative load. At a concentration of 6.0 mM NaNO2, it was 1.73 ± 0.21 µM MetHb min–1 g–1 Hb. It is assumed that this is due to the process of deoxygenation of hemoglobin.
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Sobre autores
A. Soldatov
Federal Research Center “A.O. Kovalevsky Institute of Biology of the South Seas of the Russian Academy of Sciences”; Sevastopol State University
Autor responsável pela correspondência
Email: alekssoldatov@yandex.ru
Rússia, Nakhimov av., 2, Sevastopol, 299011; Universitetskaya str., 33, Sevastopol, 299053
N. Shalagina
Federal Research Center “A.O. Kovalevsky Institute of Biology of the South Seas of the Russian Academy of Sciences”
Email: alekssoldatov@yandex.ru
Rússia, Nakhimov av., 2, Sevastopol, 299011
V. Rychkova
Federal Research Center “A.O. Kovalevsky Institute of Biology of the South Seas of the Russian Academy of Sciences”
Email: alekssoldatov@yandex.ru
Rússia, Nakhimov av., 2, Sevastopol, 299011
T. Kukhareva
Federal Research Center “A.O. Kovalevsky Institute of Biology of the South Seas of the Russian Academy of Sciences”
Email: alekssoldatov@yandex.ru
Rússia, Nakhimov av., 2, Sevastopol, 299011
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