Related Experiment Videos
Metachromatic leukodystrophy in Greece: observations on 4 cases
H Michelakakis1, E Dimitriou, C Bartsocas
1Division of Enzymology and Cellular Function, Institute of Child Health, Athens, Greece.
Clinical Genetics
|January 1, 1990
Summary
Four Greek children with metachromatic leukodystrophy presented with late infantile symptoms. One child maintained cognitive function and speech despite severe motor decline, showing high residual arylsulphatase A activity.
Area of Science:
- Neuroscience
- Genetics
- Biochemistry
Background:
- Metachromatic leukodystrophy (MLD) is a rare genetic disorder affecting the central nervous system.
- It is characterized by the accumulation of sulfatides due to arylsulfatase A deficiency.
- The late infantile form typically presents with rapid neurological deterioration.
Observation:
- Four cases of MLD diagnosed in Greece within four years are presented.
- Patients exhibited clinical symptoms consistent with the late infantile form of MLD.
- One patient demonstrated an unusual preservation of speech and cognitive abilities.
Findings:
- Despite significant motor regression and neurological impairment, one patient maintained speech and mental abilities.
- This patient also exhibited high residual arylsulfatase A activity in white blood cell homogenates.
- This activity was detectable even with a low-temperature incubation assay (0°C).
Implications:
- The findings suggest a potential correlation between preserved arylsulfatase A activity and milder cognitive phenotypes in MLD.
- This challenges the typical understanding of genotype-phenotype correlations in metachromatic leukodystrophy.
- Further research into residual enzyme activity could inform therapeutic strategies and prognostic assessments for MLD patients.