Impact of manganese accumulation on Na,K-ATPase expression and function in the cerebellum and striatum of С57Bl/6 mice

Smolyaninova, L.V.; Timoshina, Y.A.; Berezhnoy, D.S.; Fedorova, T.N.; Mikheev, I.V.; Seregina, I.F.; Loginova, N.A.; Dobretsov, M.G.

Авторы: Smolyaninova Larisa V., Timoshina Yulia A., Berezhnoy Daniil S., Fedorova Tatiana N., Mikheev Ivan V., Seregina Irina F., Loginova Nadezhda A., Dobretsov Maxim G.
Журнал: NeuroToxicology
Том: 98
Год издания: 2023
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 86
Последняя страница: 97
DOI: 10.1016/j.neuro.2023.08.002
Аннотация: Overexposure to Mn causes a neurological disorder—manganism—with motor symptoms that overlap closely with disorders associated with haploinsufficiency in the gene encoding for α3 isoform of Na+,K+-ATPase (NKA). The present study was designed to test the hypothesis that behavioral changes in the mouse model of manganism may be associated with changes in the expression and activity of α3 NKA in the cerebellum (CB) and striatum (STR)—the key brain structures responsible for motor control in adult mice. С57Bl/6 mice were exposed to MnCl2 at 0.5g/L (in drinking water) for up to eight weeks. After four weeks of Mn consumption, Mn levels were increased in the CB only. Behavioral tests demonstrated decreased performance of Mn-treated mice in the shuttle box test (third through sixth weeks), and the inclined grid walking test (first through sixth weeks), suggesting the development of learning impairment, decreased locomotion, and motor discoordination. The activity of NKA significantly decreased, and the expression of α1-α3 isoforms of NKA increased in the second week in the CB only. Thus, signs of learning and motor disturbances developing in this model of manganism are unlikely to be directly linked to disturbances in the expression or activity of NKA in the CB or STR. Whether these early changes may contribute to the pathogenesis of later behavioral deficits remains to be determined.
Добавил в систему: Михеев Иван Владимирович

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Impact of manganese accumulation on Na,K-ATPase expression and function in the cerebellum and striatum of С57Bl/6 miceстатья

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