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Belozor OS, Vasilev A, Mileiko AG, Mosina LD, Mikhailov IG, Ox DA, Boitsova EB, Shuvaev AN, Teschemacher AG, Kasparov S, Shuvaev AN. Memantine suppresses the excitotoxicity but fails to rescue the ataxic phenotype in SCA1 model mice. Biomed Pharmacother 2024; 174:116526. [PMID: 38574621 DOI: 10.1016/j.biopha.2024.116526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 03/27/2024] [Accepted: 03/28/2024] [Indexed: 04/06/2024] Open
Abstract
Spinocerebellar ataxia type 1 (SCA1) is a debilitating neurodegenerative disorder of the cerebellum and brainstem. Memantine has been proposed as a potential treatment for SCA1. It blocks N-methyl-D-aspartate (NMDA) receptors on neurons, reduces excitotoxicity and decreases neurodegeneration in Alzheimer models. However, in cerebellar neurodegenerative diseases, the potential value of memantine is still unclear. We investigated the effects of memantine on motor performance and synaptic transmission in the cerebellum in a mouse model where mutant ataxin 1 is specifically targeted to glia. Lentiviral vectors (LVV) were used to express mutant ataxin 1 selectively in Bergmann glia (BG). In mice transduced with the mutant ataxin 1, chronic treatment with memantine improved motor activity during initial tests, presumably due to preserved BG and Purkinje cell (PC) morphology and numbers. However, mice were unable to improve their rota rod scores during next days of training. Memantine also compromised improvement in the rota rod scores in control mice upon repetitive training. These effects may be due to the effects of memantine on plasticity (LTD suppression) and NMDA receptor modulation. Some effects of chronically administered memantine persisted even after its wash-out from brain slices. Chronic memantine reduced morphological signs of neurodegeneration in the cerebellum of SCA1 model mice. This resulted in an apparent initial reduction of ataxic phenotype, but memantine also affected cerebellar plasticity and ultimately compromised motor learning. We speculate that that clinical application of memantine in SCA1 might be hampered by its ability to suppress NMDA-dependent plasticity in cerebellar cortex.
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Affiliation(s)
- Olga S Belozor
- Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Partizan Zheleznyak st. 1, Krasnoyarsk 660022, Russia
| | - Alex Vasilev
- JSC «BIOCAD», Svyazi str. 34-A, Strelna, Saint-Petersburg 198515, Russia
| | | | - Lyudmila D Mosina
- Siberian Federal University, Svobodny pr., 79, Krasnoyarsk 660041, Russia
| | - Ilya G Mikhailov
- Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Partizan Zheleznyak st. 1, Krasnoyarsk 660022, Russia; Siberian Federal University, Svobodny pr., 79, Krasnoyarsk 660041, Russia
| | - Darius A Ox
- Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Partizan Zheleznyak st. 1, Krasnoyarsk 660022, Russia; Siberian Federal University, Svobodny pr., 79, Krasnoyarsk 660041, Russia
| | - Elizaveta B Boitsova
- Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Partizan Zheleznyak st. 1, Krasnoyarsk 660022, Russia
| | - Andrey N Shuvaev
- Siberian Federal University, Svobodny pr., 79, Krasnoyarsk 660041, Russia
| | - Anja G Teschemacher
- Department of Physiology, Pharmacology, and Neuroscience, University of Bristol, Bristol, United Kingdom
| | - Sergey Kasparov
- Department of Physiology, Pharmacology, and Neuroscience, University of Bristol, Bristol, United Kingdom
| | - Anton N Shuvaev
- Krasnoyarsk State Medical University named after Prof. V.F. Voino-Yasenetsky, Partizan Zheleznyak st. 1, Krasnoyarsk 660022, Russia; Siberian Federal University, Svobodny pr., 79, Krasnoyarsk 660041, Russia.
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