Genetic Influences on Schizophrenia Pathophysiology
Summary
Schizophrenia arises from the complex interplay of numerous genetic variants, each contributing modestly to overall risk, alongside rare high-penetrance alterations. Large-scale genome-wide studies have identified hundreds of loci that collectively influence neurodevelopmental processes, synaptic function and neurotransmitter balance. Copy number variants in key regions and single-nucleotide changes in genes governing signalling pathways such as DISC1, NRG1–ErbB4 and RELN underscore a convergence on cortical circuit maturation and inhibitory–excitatory balance. Functional analyses in cellular systems and animal models reveal that perturbations in dopaminergic transmission, proteostasis and mitochondrial dynamics can alter neuronal viability, connectivity and plasticity. These insights highlight biological pathways that may be targeted to modulate early developmental trajectories, restore circuit function and ultimately ameliorate cognitive and affective symptoms. A deeper understanding of how common and rare genetic factors coalesce on shared molecular networks promises to inform precision interventions and global public-health strategies for a disorder that imposes a substantial burden worldwide.
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Genetic Influences on Schizophrenia Pathophysiology publication trend
The graph below shows the total number of articles in genetic influences on schizophrenia pathophysiology across all publications each year (not limited to Nature Index journals).
Technical terms
Genome-wide association study (GWAS): An analysis scanning the entire genome for common variants associated with disease risk.
Copy number variant (CNV): A segment of DNA that is duplicated or deleted, affecting gene dosage and function.
Polygenic risk score: A measure of cumulative genetic liability derived from multiple common variants.
Synaptic plasticity: The ability of synapses to strengthen or weaken over time, underpinning learning and memory.
Proteostasis: The regulation of protein folding, trafficking and degradation to maintain cellular function.
References
- Prefrontal cortical dopamine deficit may cause impaired glucose metabolism in schizophrenia. Translational Psychiatry (2024).
- Co-Aggregation and Parallel Aggregation of Specific Proteins in Major Mental Illness. Cells (2023).
- DISC1 and reelin interact to alter cognition, inhibition, and neurogenesis in a novel mouse model of schizophrenia. Frontiers in Cellular Neuroscience (2024).
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