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Pubertal development in Rett syndrome deviates from typical females.

John T Killian1, Jane B Lane2, Gary R Cutter3

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PubMed
Summary

Pubertal trajectories in Rett syndrome show early puberty onset and delayed menarche compared to the general population. Body mass index influences timing, but mutation type and clinical presentation effects are less clear.

Keywords:
Body mass indexMECP2 mutationsMenarchePubertyRett syndromeneurodevelopmental disorder

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Area of Science:

  • Neurodevelopmental disorders
  • Pediatric endocrinology
  • Genetics

Background:

  • Rett syndrome is a rare neurodevelopmental disorder affecting approximately 1 in 10,000 live female births.
  • Individuals with Rett syndrome often experience reduced growth and altered pubertal development.
  • This study investigates the unique pubertal trajectories in females with Rett syndrome.

Purpose of the Study:

  • To characterize the pubertal trajectories in females with Rett syndrome.
  • To compare pubertal timing and milestones with the general female population.
  • To explore the relationship between body mass index, mutation type, clinical severity, and pubertal timing.

Main Methods:

  • Utilized data from the Rett Syndrome Natural History Study.
  • Assessed intervals to thelarche, adrenarche, and menarche using survival analysis.
  • Employed log-likelihood and chi-squared analyses to examine relationships between variables and pubertal synchrony.

Main Results:

  • Over 25% of females with Rett syndrome initiated puberty early, with a median menarche age of 13.0 years, later than the general population.
  • Higher body mass index correlated with earlier thelarche and adrenarche, while milder mutations and clinical presentation were associated with earlier menarche.
  • Pubertal synchrony varied, with 15% initiating with thelarche and 32% with adrenarche, differing from the general population.

Conclusions:

  • Pubertal trajectories in Rett syndrome are distinct, characterized by early onset and delayed menarche.
  • Body mass index significantly impacts pubertal timing in this population.
  • The precise relationship between genetic mutations, clinical presentation, and neuroendocrine mechanisms requires further investigation.