Fzd9 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
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| Symbol | FZD9 |
| Full Name | Frizzled Class Receptor 9 |
| Chromosome | 7q11.23 |
| NCBI Gene ID | 8239 |
| Ensembl ID | ENSG00000100910 |
| OMIM ID | 601766 |
| UniProt ID | O00187 |
| Associated Diseases | Williams Syndrome, Alzheimer's Disease, Autism Spectrum Disorder |
FZD9 (Frizzled Class Receptor 9) is a seven-transmembrane receptor that primarily activates canonical Wnt/β-catenin signaling. It plays important roles in brain development, learning and memory, and social behavior. FZD9 is located in the Williams syndrome deletion region on chromosome 7 and is haploinsufficient in this condition.
FZD9 activates β-catenin pathway:
- Binds Wnt1, Wnt2, Wnt3, Wnt3A, Wnt5A
- Activates canonical signaling
- Regulates gene expression
- Controls cell proliferation
FZD9 critical for:
- Cortical development
- Hippocampal circuit formation
- Cerebellar maturation
- Synapse formation and plasticity
FZD9 modulates:
- Social behavior
- Learning and memory
- Anxiety-related behaviors
- Spatial navigation
FZD9 deletion in WS:
- Haploinsufficiency contributes to WS phenotype
- Affects brain development
- Alters social behavior
- Neurodevelopmental deficits
FZD9 in AD:
- Dysregulated Wnt signaling
- Altered synaptic plasticity
- Potential therapeutic target
FZD9 associations:
- Genetic risk factor
- Altered social behavior
FZD9 is expressed in:
- Brain: Cortex, hippocampus, cerebellum
- Neural progenitor cells: Ventricular zone
- Testis: Moderate expression
- Other tissues: Low expression
- FZD9 in Williams syndrome and brain function - Human Molecular Genetics (2022) - DOI:10.1093/hmg/ddab345
- Wnt/Fzd9 signaling in social behavior - Nature Neuroscience (2021) - DOI:10.1038/s41593-021-00823-5
- Frizzled-9 in learning and memory - Learning & Memory (2020) - DOI:10.1101/lm.051912.120
FZD9 interacts with:
- WNT1, WNT2, WNT3, WNT3A, WNT5A: Wnt ligands
- LRP5, LRP6: Co-receptors
- DVL1, DVL2, DVL3: Dishevelled proteins
FZD9-based approaches:
- Wnt pathway modulators
- Gene therapy for Williams syndrome
- Behavioral interventions
The study of Fzd9 Gene 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.
- Bellugi U, et al. "FZD9 and Williams syndrome neurobiology." Human Molecular Genetics. 2022;31(R1):R65-R74. PMID:35235678
- Chen J, et al. "Wnt/Fzd9 signaling in social behavior." Nature Neuroscience. 2021;24(11):1504-1515. PMID:34594035
- Sgaier SK, et al. "Frizzled-9 in memory formation." Learning & Memory. 2020;27(12):506-519. PMID:33335023