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Wendy A Gold1,2, Alan K Percy3, Jeffrey L Neul4,5

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Rett syndrome (RTT) is a severe neurodevelopmental disorder caused by MECP2 gene mutations. Research into MeCP2 deficiency is advancing treatments like trofinetide for RTT patients.

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Area of Science:

  • Neuroscience
  • Genetics
  • Developmental Biology

Background:

  • Rett syndrome (RTT) is a severe neurodevelopmental disorder primarily affecting females.
  • Pathogenic variants in the MECP2 gene are the most common cause of RTT.
  • MeCP2 protein regulates gene expression and is crucial for brain function.

Purpose of the Study:

  • To summarize the understanding of Rett syndrome pathophysiology.
  • To highlight advancements in RTT management and therapeutic development.

Main Methods:

  • Review of neuroimaging, neuropathology, and neurochemistry studies.
  • Analysis of animal and cellular models of MeCP2 deficiency.
  • Examination of clinical data and natural history studies for RTT.

Main Results:

  • RTT is characterized by developmental regression, including loss of speech and hand use, alongside other neurological impairments.
  • Studies reveal reduced brain size, neuronal size, and altered neurotransmitter systems in RTT.
  • MeCP2 deficiency models have been instrumental in understanding RTT and developing therapies.

Conclusions:

  • Understanding MeCP2's role is key to RTT pathophysiology.
  • Therapeutic strategies, including approved drug trofinetide and ongoing gene therapies, show promise for RTT.
  • Continued research in animal and cellular models is vital for future RTT treatments.