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SPTLC1 is mutated in hereditary sensory neuropathy, type 1
K Bejaoui1, C Wu, M D Scheffler
1C.B. Day Laboratory for Neuromuscular Research, Massachusetts General Hospital (East), Charlestown, Massachusetts, USA.
Nature Genetics
|March 10, 2001
Summary
Hereditary sensory neuropathy type 1 (HSN1) is linked to a gene encoding a serine palmitoyltransferase subunit. This gene, found in dorsal root ganglia, is mutated in HSN1 patients.
Area of Science:
- Genetics
- Neurology
- Molecular Biology
Background:
- Hereditary sensory neuropathy type 1 (HSN1) is a genetic disorder affecting nerve function.
- Previous studies mapped the HSN1 gene to chromosome 9q22.
Purpose of the Study:
- To identify the specific gene responsible for HSN1.
- To investigate the role of serine palmitoyltransferase in HSN1 pathogenesis.
Main Methods:
- Genetic mapping of the HSN1 locus.
- Gene expression analysis in dorsal root ganglia (DRG).
- Mutation analysis of the identified gene in HSN1 patients.
Main Results:
- The gene encoding a serine palmitoyltransferase subunit was localized to the HSN1 locus on chromosome 9q22.
- This gene is expressed in DRG, the affected nerve cells in HSN1.
- Mutations in this gene were identified in HSN1 patients.
Conclusions:
- Mutations in the serine palmitoyltransferase subunit gene are the cause of HSN1.
- This finding provides a molecular basis for HSN1 and potential therapeutic targets.