| PSEN1-Mutant Neurons | |
|---|---|
| Mutation Type | Familial Alzheimer's Disease |
| Gene Affected | PSEN1 (Presenilin-1) |
| Common Mutations | M146V, L286V, A246E, H163R, A434C |
| Inheritance | Autosomal Dominant |
| Disease | [Familial Alzheimer's Disease](/diseases/alzheimers-disease) |
Psen1 Mutant Neurons plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
PSEN1-mutant neurons are neurons carrying pathogenic mutations in the Presenilin-1 gene (PSEN1), which encodes the catalytic core of the gamma-secretase complex. These mutations are the most common cause of autosomal dominant familial Alzheimer's disease (FAD), typically causing onset between 30-50 years of age. PSEN1 mutations account for approximately 50-70% of all FAD cases and over 300 pathogenic mutations have been identified in the gene.
Presenilin-1 is the catalytic subunit of the gamma-secretase complex, which cleaves amyloid precursor protein (APP) to generate amyloid-beta (Aβ) peptides. PSEN1 mutations lead to:
Beyond amyloidogenesis, PSEN1 mutations affect:
PSEN1-mutant neurons derived from patient iPSCs or transgenic models exhibit:
| Feature | PSEN1-Mutant Phenotype | Normal Control |
|---|---|---|
| Aβ42/40 ratio | Elevated (2-10x) | Baseline |
| Tau phosphorylation | Increased | Baseline |
| Synaptic density | Reduced | Normal |
| Mitochondrial membrane potential | Decreased | Stable |
| Calcium homeostasis | Dysregulated | Regulated |
PSEN1 mutations cause early and prominent degeneration in:
PSEN1-mutant neurons are associated with:
Patient-derived iPSC neurons carrying PSEN1 mutations provide valuable models for:
Common mouse models include:
Psen1 Mutant Neurons plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
The study of Psen1 Mutant Neurons has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.