elF2B-Related Disorders: Antenatal Onset and Involvement of Multiple Organs

Marjo S. Van Der Knaap, Carola G.M. Van Berkel, Jochen Herms, Rudy Van Coster, Martina Baethmann, Sakkubai Naidu, Eugen Boltshauser, Michèl A.A.P. Willemsen, Barbara Plecko, Georg F. Hoffmann, Christopher G. Proud, Gert C. Scheper, Jan C. Pronk

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111 Citations (Scopus)

Abstract

Leukoencephalopathy with vanishing white matter, also called "childhood ataxia with central nervous system hypomyelination," is the first human disease related to mutations in any of the five genes encoding subunits of eukaryotic initiation factor eIF2B or any translation factor at all. eIF2B is essential in all cells of the body for protein synthesis and the regulation of this protein synthesis under different stress conditions. It is surprising that mutations in the eIF2B genes have been reported to lead to abnormalities of the white matter of the brain only, although it has been shown recently that ovarian failure may accompany the leukoencephalopathy. Another surprising observation is that the onset of the disease varies from early childhood to adulthood, with the exception of Cree leukoencephalopathy, a disease related to a particular mutation in one of the eIF2B genes, which invariably has its onset within the first year of life. We analyzed the eIF2B genes of nine patients with an antenatal- or early-infantile-onset encephalopathy and an early demise and found mutations in eight of the patients. In addition to signs of a serious encephalopathy, we found oligohydramnios, intrauterine growth retardation, cataracts, pancreatitis, hepatosplenomegaly, hypoplasia of the kidneys, and ovarian dysgenesis. Until now, no evidence had been found for a genotype-phenotype correlation, but the consistently severe phenotype in affected siblings among our patients and in Cree encephalopathy patients suggests an influence of the genotype on the phenotype.

Original languageEnglish
Pages (from-to)1199-1207
Number of pages9
JournalAmerican Journal of Human Genetics
Volume73
Issue number5
DOIs
Publication statusPublished - Nov 2003

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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