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ALS - Motor Neuron Disease: Mechanism and Development of New Therapies
15:48

ALS - Motor Neuron Disease: Mechanism and Development of New Therapies

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Adult-onset MLD: a gene mutation with isolated polyneuropathy

K J Felice1, M Gomez Lira, M Natowicz

  • 1Department of Neurology, University of Connecticut School of Medicine, Farmington 06035-1840, USA. felice@nso.uchc.edu

Neurology
|November 4, 2000
PubMed

Insights

A novel mutation in the Arylsulfatase A (ASA) gene caused peripheral neuropathy in a young man. This genetic finding explains his recurrent nerve damage and slow nerve conduction velocities.

Area of Science:

  • Biochemistry
  • Genetics
  • Neurology

Background:

  • Peripheral neuropathies can arise from various genetic and metabolic disorders.
  • Arylsulfatase A deficiency is a known cause of neurological impairment, typically affecting the central nervous system.

Observation:

  • A 22-year-old male presented with recurrent ulnar mononeuropathies and generalized slow nerve conduction velocities.
  • Biochemical tests showed reduced Arylsulfatase A (ASA) activity and increased urinary sulfatides.
  • Nerve biopsy indicated demyelination and Schwann cell abnormalities, but central nervous system evaluations were normal.

Findings:

  • Molecular genetic analysis identified a novel homozygous missense mutation, Thr286Pro, in the ASA gene.
  • This mutation is associated with reduced ASA enzyme activity and the observed peripheral neuropathy phenotype.
  • The findings suggest a specific genotype-phenotype correlation within ASA gene mutations.

Implications:

  • This case expands the known spectrum of Arylsulfatase A deficiency.
  • It highlights the importance of considering metabolic and genetic causes in unexplained peripheral neuropathies.
  • Further research into genotype-specific therapies for ASA deficiency may be warranted.

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