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Induction and Clinical Scoring of Chronic-Relapsing Experimental Autoimmune Encephalomyelitis
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Acute disseminated encephalomyelitis in children: clinical features and HLA-DR linkage

Zh R Idrissova1, M N Boldyreva, E P Dekonenko

  • 1First Clinical Infections Hospital, Moscow, Russia. idrissova_z@hotmail.com

European Journal of Neurology
|August 28, 2003
PubMed

Insights

Acute disseminated encephalomyelitis (ADEM) presents differently based on viral triggers like rubella or varicella. Genetic factors, specifically DRB1 gene types, are linked to ADEM in the Russian population, suggesting a distinct autoimmune condition.

Area of Science:

  • Pediatric Neurology
  • Immunology
  • Infectious Diseases

Background:

  • Acute disseminated encephalomyelitis (ADEM) is an immune-mediated demyelinating disease affecting children.
  • Understanding the specific clinical presentations and etiological triggers of ADEM is crucial for diagnosis and management.

Purpose of the Study:

  • To characterize clinical patterns and outcomes of ADEM based on preceding infections (rubella, varicella) and suspected viral etiology.
  • To investigate the association of HLA class II DRB1 gene types with ADEM in the Russian population.
  • To differentiate multiphasic disseminated encephalomyelitis (MDEM) from monophasic ADEM.

Main Methods:

  • Retrospective analysis of 90 children diagnosed with ADEM.
  • Neurological examinations, laboratory tests, viral serology (ELISA), and MRI scans.
  • HLA class II DRB1 gene typing in a subset of patients and long-term follow-up (1-5 years).

Main Results:

  • Rubella-associated ADEM showed explosive onset, seizures, and coma; varicella-associated ADEM presented with cerebellar ataxia.
  • Suspected viral ADEM had a polysymptomatic presentation; MDEM involved older children with severe neurological deficits and distinct MRI findings.
  • ADEM in the Russian population is associated with DRB1*01 and DRB1*017(03) alleles.

Conclusions:

  • ADEM exhibits distinct clinical phenotypes depending on the viral trigger, suggesting specific pathogenic mechanisms.
  • Genetic predisposition, particularly HLA class II alleles, plays a role in ADEM development.
  • ADEM is proposed as a distinct autoimmune condition influenced by viral triggers and genetic background.

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