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MECP2 Dysautonomia Phenotypes in Boys.

Lisa Courgeon1, Kévin Uguen2, Jérémie Lefranc3

  • 1Department of Neuropediatrics, Brest University Hospital, Brest, France.

Pediatric Neurology
|July 9, 2022
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Summary

Dysautonomia symptoms are common in boys with MECP2 mutations, affecting most cases. Early recognition of these autonomic nervous system issues aids in diagnosing and managing MECP2 gene variants.

Keywords:
DysautonomiaMECP2MaleMutation

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Area of Science:

  • Pediatric Neurology
  • Genetics
  • Autonomic Nervous System Disorders

Background:

  • MECP2 mutations are associated with various neurological conditions in boys.
  • Identifying dysautonomia is crucial for the diagnosis and management of these patients.

Purpose of the Study:

  • To investigate the prevalence of dysautonomia symptoms in boys diagnosed with MECP2 mutations.
  • To understand the clinical presentation of dysautonomia in relation to MECP2 variants.

Main Methods:

  • A national retrospective study was conducted from 2000 to 2020.
  • Medical records of boys under 18 with pathogenic MECP2 variants were analyzed.
  • Systematic review for dysautonomic signs across cardiovascular, respiratory, gastrointestinal, and thermoregulatory systems.

Main Results:

  • Dysautonomia was present in 9 out of 13 boys with MECP2 mutations.
  • Two subgroups emerged: ambulatory with intellectual disabilities (6/13) and non-ambulatory with severe encephalopathy (7/13).
  • Dysautonomia signs were observed in both subgroups, with higher prevalence in the severe encephalopathy group (7/7).

Conclusions:

  • The findings support the importance of MECP2 genetic testing in boys presenting with encephalopathy or intellectual disabilities.
  • Investigating dysautonomia is recommended for early diagnosis and management in this patient population.