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Measurements of Motor Function and Other Clinical Outcome Parameters in Ambulant Children with Duchenne Muscular Dystrophy
Published on: January 12, 2019
Early neurodevelopmental assessment in Duchenne muscular dystrophy
Marika Pane1, Roberta Scalise, Angela Berardinelli
1Department of Paediatric Neurology, Catholic University, Rome, Italy.
Neuromuscular Disorders : NMD
|March 29, 2013
Summary
This study assessed neurodevelopment in boys with Duchenne muscular dystrophy (DMD), finding mutation location impacts cognitive development. Boys with upstream mutations showed better outcomes, suggesting brain dystrophin isoform involvement in neurodevelopmental delays.
Area of Science:
- Pediatric Neurology
- Genetics
- Developmental Biology
Background:
- Duchenne muscular dystrophy (DMD) is a severe genetic disorder affecting muscle function.
- Neurodevelopmental deficits are increasingly recognized in DMD patients.
- The role of specific dystrophin isoforms in brain function requires further elucidation.
Purpose of the Study:
- To evaluate the neurodevelopmental profile of young boys with DMD.
- To correlate neurodevelopmental outcomes with the type and location of DMD mutations.
- To investigate the influence of brain dystrophin isoform involvement on neurodevelopment.
Main Methods:
- Neurodevelopmental assessment using the Griffiths Scale of Mental Development.
- Study included 81 boys with DMD under four years of age.
- Mutation analysis to determine type and site (upstream/downstream of exon 44).
Main Results:
- Mean total Developmental Quotient (DQ) was 87; 32% had borderline DQ, 12.3% had DQ below 70.
- Boys with mutations upstream or in exon 44 exhibited significantly higher DQ than those with downstream mutations.
- Locomotor skills were universally impaired, irrespective of mutation site or age.
Conclusions:
- Mutation location in DMD influences neurodevelopmental trajectories, particularly cognitive and motor skills.
- Mutations downstream of exon 44, associated with altered brain dystrophin isoforms, correlate with lower DQ.
- Findings suggest brain dystrophin isoform deficiency contributes to neurodevelopmental delays in coordination and dexterity.
