Cerebellar Granule Cells (CGCs) are the most abundant neuron type in the mammalian brain, located in the cerebellar granular layer. These small GABAergic neurons play critical roles in motor coordination, learning, and timing[1].
In Refsum Disease, a rare peroxisomal storage disorder, CGCs undergo degeneration due to phytanic acid accumulation, leading to progressive ataxia and other neurological manifestations.
| Property | Value |
|---|---|
| Category | Cerebellum |
| Location | Cerebellar granular layer |
| Cell Type | Cerebellar granule neurons |
| Key Gene | PHYH (Phytanoyl-CoA hydroxylase) |
| Taxonomy | ID | Name / Label |
|---|---|---|
| Cell Ontology (CL) | CL:0000120 | granule cell |
Similar mechanisms are observed in spinocerebellar ataxias and Friedreich's ataxia, where mitochondrial dysfunction and oxidative stress contribute to CGC degeneration.
Gene therapy for PHYH and PEX7 mutations
Peroxisome restoration approaches
Cerebellar Granule Cells
neuron
GABAergic
Refsum Disease
neurons
Mossy fiber
Cerebellar circuitry
Oxidative stress
Eccles JC, Ito M, Szentagothai J. The Cerebellum as a Neuronal Machine. 1967. ↩︎
Wanders RJ, Waterham HR, Leroy BP. Refsum disease. 2006. ↩︎