Associations Between Self-Reported Behavioral and Learning Concerns and DMD Isoforms in Duchenne Muscular Dystrophy

Area of Science:

• Neurology
• Genetics
• Pediatrics

Background:

• Duchenne muscular dystrophy (DMD) is an X-linked disorder caused by dystrophin loss.
• Dystrophin isoforms are present in the brain, and DMD is associated with cognitive and behavioral deficits.

Purpose of the Study:

• To investigate associations between specific DMD isoforms, patient characteristics, and behavioral/learning concerns.
• To identify factors influencing neurodevelopmental outcomes in DMD.

Main Methods:

• Analysis of de-identified data from the Duchenne Registry (2007-2019).
• Exclusion of females, Becker muscular dystrophy (BMD) patients, and those lacking genetic reports.
• Genetic analysis categorized patients by mutation location and affected isoforms; statistical analyses included chi-square and logistic regression.

Main Results:

• Mutations affecting Dp140 and Dp71 isoforms correlated with increased behavioral and learning concerns.
• Corticosteroid use, age, and country of residence were also associated with these concerns.

Conclusions:

• Specific DMD isoforms and their mutational consequences significantly impact behavior and learning.
• This study enhances understanding of the neurocognitive aspects of Duchenne muscular dystrophy.