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V-ATPase Dysfunction in the Brain: Genetic Insights and Therapeutic Opportunities
Antonio Falace1, Greta Volpedo2, Marcello Scala2,3
1Pediatric Neurology and Muscular Diseases Unit, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy.
Abstract:
Vacuolar-type ATPase (v-ATPase) is a multimeric protein complex that regulates H+ transport across membranes and intra-cellular organelle acidification. Catabolic processes, such as endocytic degradation and autophagy, strictly rely on v-ATPase-dependent luminal acidification in lysosomes. The v-ATPase complex is expressed at high levels in the brain and its impairment triggers neuronal dysfunction and neurodegeneration. Due to their post-mitotic nature and highly specialized function and morphology, neurons display a unique vulnerability to lysosomal dyshomeostasis. Alterations in genes encoding subunits composing v-ATPase or v-ATPase-related proteins impair brain development and synaptic function in animal models and underlie genetic diseases in humans, such as encephalopathies, epilepsy, as well as neurodevelopmental, and degenerative disorders. This review presents the genetic and functional evidence linking v-ATPase subunits and accessory proteins to various brain disorders, from early-onset developmental epileptic encephalopathy to neurodegenerative diseases. We highlight the latest emerging therapeutic strategies aimed at mitigating lysosomal defects associated with v-ATPase dysfunction.
Insights
Vacuolar-type ATPase (v-ATPase) dysfunction impairs brain function, leading to neurodevelopmental and neurodegenerative disorders. This review explores genetic links and therapeutic strategies for v-ATPase-related lysosomal defects.
Area of Science:
- Cell Biology
- Neuroscience
- Genetics
Background:
- Vacuolar-type ATPase (v-ATPase) is crucial for cellular acidification and lysosomal function.
- Neurons are particularly vulnerable to lysosomal dyshomeostasis due to their unique biology.
- v-ATPase impairment is linked to neuronal dysfunction and neurodegeneration.
Purpose of the Study:
- To review genetic and functional evidence connecting v-ATPase subunits and accessory proteins to brain disorders.
- To highlight emerging therapeutic strategies for v-ATPase-associated lysosomal defects.
Main Methods:
- Literature review of genetic and functional studies.
- Analysis of animal models and human genetic diseases.
- Synthesis of current therapeutic approaches.
Main Results:
- Alterations in v-ATPase genes cause impaired brain development and synaptic function.
- v-ATPase dysfunction underlies various human brain disorders, including encephalopathies, epilepsy, and neurodegenerative diseases.
- Emerging therapies target lysosomal defects in v-ATPase dysfunction.
Conclusions:
- v-ATPase is a critical regulator of neuronal health, and its dysfunction is implicated in a spectrum of brain disorders.
- Targeting v-ATPase-related lysosomal defects offers potential therapeutic avenues for neurological conditions.
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