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Encephalitis ll: Pathophysiology01:26

Encephalitis ll: Pathophysiology

Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...
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Related Experiment Video

Updated: May 11, 2026

An Electrochemiluminescence-Based Assay for MeCP2 Protein Variants
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Published on: May 22, 2020

Genetically determined encephalopathy: Rett syndrome.

Nadia Bahi-Buisson1

  • 1Department of Pediatric Neurology, Université Paris Descartes; Imaging Institute; INSERM U781, Paris, France.

Handbook of Clinical Neurology
|April 30, 2013
PubMed
Summary
This summary is machine-generated.

Rett syndrome (RTT) is a severe neurodevelopmental disorder in females, often caused by MECP2 gene mutations. Management focuses on individualized, multidisciplinary care to optimize abilities and address key health issues.

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Area of Science:

  • Genetics
  • Neuroscience
  • Pediatrics

Background:

  • Rett syndrome (RTT) is a severe neurodevelopmental disorder affecting approximately 1 in 10,000 female births.
  • Characterized by normal early development followed by loss of motor skills, social interaction, and development of stereotyped hand movements.
  • Includes classical and atypical variants like congenital, early onset seizure, preserved speech, and "forme fruste."

Purpose of the Study:

  • To provide an overview of Rett syndrome, including its genetic basis, clinical presentation, and management strategies.
  • To highlight the genetic mutations associated with different RTT variants.
  • To emphasize the importance of a multidisciplinary approach in managing RTT patients.

Main Methods:

  • Review of existing literature on Rett syndrome.
  • Identification of genetic mutations (MECP2, CDKL5, FoxG1) linked to RTT variants.
  • Description of current symptomatic and individualized management approaches.

Main Results:

  • Mutations in the MECP2 gene are found in most classical RTT cases.
  • CDKL5 and FoxG1 gene mutations are identified in early onset seizure and congenital RTT variants, respectively.
  • Management is symptomatic and individualized, focusing on optimizing patient abilities.

Conclusions:

  • RTT is a complex disorder with variable presentation and genetic underpinnings.
  • A dynamic, multidisciplinary approach is crucial for effective management.
  • Addressing specific issues like seizures, scoliosis, osteoporosis, spasticity, and communication is vital for improving quality of life.