Russian Journal of PhysiologyRussian Journal of PhysiologyРоссийский физиологический журнал им. И.М. Сеченова0869-81392658-655XThe Russian Academy of Sciences65166810.31857/S0869813924030117COYXCHEXPERIMENTAL ARTICLESЭКСПЕРИМЕНТАЛЬНЫЕ СТАТЬИResearch ArticleFunctional Changes in the Expression of the Aqp4 Gene in the Hypothalamus Under the Influence of Drinking Regimen and Arterial Hypertension in RatsФункциональные изменения экспрессии гена Aqp4 в гипоталамусе крыс при смене питьевого режима и артериальной гипертензииEvtushenkoA. A.ЕвтушенкоА. А.
Russian Federation
evtushenkoaa@neuronm.ruOrlovI. V.ОрловИ. В.
Russian Federation
evtushenkoaa@neuronm.ruVoronovaI. P.ВороноваИ. П.
Russian Federation
evtushenkoaa@neuronm.ruKozyrevaT. V.КозыреваТ. В.
Russian Federation
evtushenkoaa@neuronm.ruScientific Research Institute of Neurosciences and MedicineНаучно-исследовательский институт нейронаук и медициныNovosibirsk State UniversityНовосибирский государственный университет15032024110349951101022025Copyright ©; 2024, Russian Academy of SciencesCopyright ©; 2024, Российская академия наук2024Russian Academy of SciencesРоссийская академия наукhttps://journals.eco-vector.com/0869-8139/article/view/651668

Aquaporin-4 (AQP4) is the main water channel in the central nervous system. AQP4 is densely expressed in brain structures suggesting a crucial role in water transport in normal conditions and in disease. The effect of changes in drinking regime (water-deprivation and hyperhydration) and inherited arterial hypertension on the expression of the AQP4 water channel gene in the hypothalamus, the center of regulation of visceral functions, was studied. It was shown that the level of the Aqp4 mRNA in hyperhydrated animals more than 1.5 times lower than in animals with water-deprivation. This decrease in the Aqp4 gene expression in the hypothalamus may be associated with the ability to prevent cytotoxic edema during increased fluid intake. Rats with inherited stress induced arterial hypertension (ISIAH) are characterized by an increased level of Aqp4 mRNA in the hypothalamus, which suggests the involvement of this channel in processes associated with the regulation of brain water balance during arterial hypertension and the prevention of vasogenic cerebral edema. Thus, the presence of the AQP4 water channel in the brain, associated with the protection of brain cells, is functionally determined by the state of the body. This may be evidenced by bidirectional changes in the Aqp4 gene expression during hyperhydration and arterial hypertension.

Аквапорин-4 (AQP4) является основным водным каналом в центральной нервной системе. Его высокая экспрессия в структурах головного мозга предполагает важную роль в транспорте воды в норме и при патологии. Исследовалось влияние изменения питьевого режима (водная депривация и гипергидратация) и наследственной артериальной гипертензии на экспрессию гена водного канала AQP4 в гипоталамусе – центре регуляции висцеральных функций. Показано, что уровень мРНК Aqp4 у гипергидратированных животных более чем в 1.5 раза ниже, чем у животных с водной депривацией. Такое изменение экспрессии гена Aqp4 в гипоталамусе может быть связано с возможностью предотвращения цитотоксического отека при повышенном поступлении жидкости в организм. Крысы с наследственной артериальной гипертензией характеризуются повышенным уровнем мРНК Aqp4 в гипоталамусе, что позволяет предполагать вовлеченность этого канала в процессы, связанные с особенностями регуляции водного баланса мозга при артериальной гипертензии и предотвращения вазогенного отека. Таким образом, представительство водного канала AQP4 в мозге, связанное с защитой клеток мозга, функционально обусловлено состоянием организма, о чем могут свидетельствовать разнонаправленные изменения экспрессии гена Aqp4 при гипергидратации и артериальной гипертензии.

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