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An In Vitro Model for the Study of Cellular Pathophysiology in Globoid Cell Leukodystrophy
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Leukodystrophies with astrocytic dysfunction.

Diana Rodriguez1

  • 1Université Pierre et Marie Curie-Paris 6 and Hôpital Armand Trousseau, Paris, France.

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

Astrocytic dysfunction causes leukodystrophies, impacting CNS myelin maintenance. Genetic mutations in GFAP, EIF2B, MLC1, and ASPA genes lead to these devastating neurological disorders.

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Area of Science:

  • Neuroscience
  • Genetics
  • Pathology

Background:

  • Astrocytic dysfunctions are implicated in several leukodystrophies.
  • Alexander disease, a primary astrocytic disorder, results from GFAP mutations and presents with Rosenthal fibers.
  • Other recessive leukodystrophies involve spongiform or cystic white matter degeneration.

Purpose of the Study:

  • To review and highlight the role of astrocytes in myelination and myelin maintenance.
  • To discuss genetic astrocytic disorders including Alexander disease, CACH/VWM, MLC, and Canavan disease.
  • To correlate genetic mutations with clinical and MRI findings in leukodystrophies.

Main Methods:

  • Review of literature on genetic astrocytic leukodystrophies.
  • Analysis of clinical presentations and neuroimaging (MRI) findings.
  • Correlation of specific gene mutations (GFAP, EIF2B, MLC1, ASPA) with disease phenotypes.

Main Results:

  • Alexander disease (GFAP mutations) shows CNS-wide Rosenthal fibers, megalencephaly, and specific MRI patterns.
  • CACH/VWM (EIF2B mutations) and MLC (MLC1 mutations) exhibit white matter cystic degeneration, with varying clinical severity and MRI features.
  • Canavan disease (ASPA mutations) is diagnosed by increased urinary NAA, with astrocyte involvement.

Conclusions:

  • Astrocytes play a critical role in CNS myelination and myelin maintenance.
  • Genetic mutations affecting astrocytes lead to a spectrum of leukodystrophies with distinct pathological and clinical features.
  • Understanding these astrocytic disorders advances knowledge of myelin biology and potential therapeutic targets.