Profiling scoliosis in Rett syndrome

Area of Science:

• Neurology
• Genetics
• Orthopedics

Background:

• Rett syndrome (RTT) is a rare neurodevelopmental disorder.
• Scoliosis is a common complication in RTT, impacting quality of life.
• Understanding genotype-phenotype correlations is crucial for RTT management.

Purpose of the Study:

• To investigate scoliosis prevalence, comorbidities, and genotype-phenotype correlations in RTT.
• To identify clinical factors associated with scoliosis in RTT patients.
• To analyze the impact of specific MECP2 mutations on scoliosis risk.

Main Methods:

• Data from 554 RTT participants in the Rare Disease Clinical Research Network database were analyzed.
• Clinical evaluations included history, physical examination, anthropometric measurements, Clinical Severity Scale (CSS), and motor-behavioral analysis (MBA).
• Scoliosis was assessed via examination and radiography (Cobb angle); statistical analyses used logistic regression models.

Main Results:

• Scoliosis was present in 53% of RTT participants (292/554).
• Increased scoliosis risk was associated with higher MBA severity scores, later motor skill acquisition, loss of walking ability, and constipation.
• Specific MECP2 mutations (R294X and R306C) showed a reduced risk for scoliosis.

Conclusions:

• Scoliosis is highly prevalent in RTT and linked to specific clinical and genetic factors.
• Clinical severity, motor function, and gastrointestinal issues are key comorbidities associated with scoliosis in RTT.
• Identifying protective MECP2 mutations can inform future research and clinical trial design for RTT.