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.
Abstract:
We report our findings in four cases of metachromatic leukodystrophy diagnosed in Greece during the last 4 years. The age of onset and the clinical symptoms were those described for the late infantile form of the disease. However, one patient retained his speech and mental abilities despite his pronounced motor regression and neurological involvement. This was combined with high residual arylsulphatase A activity in white blood cell homogenates even in the 0 degrees C incubation assay.
Insights
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.