Библиографическое описание:Marine Bacteria under Low-Intensity Radioactive Exposure: Model Experiments : научное издание / Olga V. Kolesnik, Tatiana V. Rozhko, Nadezhda S. Kudryasheva. - Текст : непосредственный // International Journal of Molecular Sciences. - 2023. - Т.24, №1. - P. 410. - ISSN 1422-0067. - ISSN 1422-0067, DOI 10.3390/ijms24010410.
Аннотация:Radioactive contaminants create problems all over world, involving marine ecosystems,with their ecological importance increasing in the future. The review focuses on bioeffects of a series of alpha and beta emitting radioisotopes (americium-241, uranium-(235 + 238), thorium-232, and tritium) and gamma radiation. Low-intensity exposures are under special consideration. Great attention has been paid to luminous marine bacteria as representatives of marine microorganisms and a conventional bioassay system. This bioassay uses bacterial bioluminescence intensity as the main testing physiological parameter; currently, it is widely applied due to its simplicity and sensitivity. Dependences of the bacterial luminescence response on the exposure time and irradiation intensity were reviewed, and applicability of hormetic or threshold models was discussed. A number of aspects of molecular intracellular processes under exposure to low-intensity radiation were analyzed: (a) changes in the rates of enzymatic processes in bacteria with the bioluminescent system of coupled enzymatic reactions of NADH:FMN-oxidoreductase and bacterial luciferase taken as an example; (b) consumption of an intracellular reducer, NADH; (c) active role of reactive oxygen species; (d) re- pairing of the DNA damage. The results presented confirm the function of humic substances as natural radioprotectors.
Источник:International Journal of Molecular Sciences
Выпуск:Т.24, №1
Номера страниц:410
Держатель оригинала документа:Federal Research Center ‘Krasnoyarsk Science Center SB RAS, Professor V.F. Voino-Yasenetsky Krasnoyarsk State Medical University, Siberian Federal University
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