Brain N-acetylaspartate levels correlate with motor function in metachromatic leukodystrophy

Area of Science:

• Neuroscience
• Biochemistry
• Medical Imaging

Background:

• Late infantile metachromatic leukodystrophy (MLD) is a severe demyelinating lysosomal storage disorder.
• N-acetylaspartate (NAA) is crucial for myelin synthesis and indicates neuronal health.
• Current methods lack sensitive disease progression markers for MLD.

Purpose of the Study:

• To investigate N-acetylaspartate (NAA) levels as a potential biomarker for disease progression in late infantile metachromatic leukodystrophy (MLD).
• To correlate NAA levels with cognitive and motor function in MLD patients.

Main Methods:

• Proton magnetic resonance spectroscopy (MRS) was used to measure NAA, total choline, and total creatine in the deep white matter of 13 children with MLD.
• Standardized cognitive and motor function tests were administered.

Main Results:

• NAA levels showed a significant decrease with advancing MLD.
• A wide range of motor and cognitive function was observed across the patient cohort.
• Strong positive correlations were found between NAA levels and both motor and cognitive function measures.

Conclusions:

• NAA levels measured by proton MRS show promise as a sensitive biomarker for tracking MLD progression in children.
• Proton MRS may be a valuable tool for evaluating treatment efficacy in MLD.