GFAP mutations and polymorphisms in 13 unrelated Italian patients affected by Alexander disease

F. Caroli, R. Biancheri, M. Seri, A. Rossi, A. Pessagno, M. Bugiani, F. Corsolini, S. Savasta, A. Romano, C. Antonelli, A. Romano, D. Pareyson, P. Gambero, G. Uziel, R. Ravazzolo, I. Ceccherini, Mirella Filocamo

Research output: Contribution to journalArticle

Abstract

Alexander disease (AD), a rare neurodegenerative disorder of the central nervous system, is characterized by the accumulation of cytoplasmic protein aggregates (Rosenthal fibers) composed of glial fibrillary acidic protein (GFAP) and small heat-shock proteins within astrocytes. To date, more than 40 different GFAP mutations have been reported in AD. The present study is aimed at the molecular diagnosis of Italian patients suspected to be affected by AD. By analyzing the GFAP gene of 13 unrelated patients (eight with infantile form, two with juvenile form and three with adult form), we found 11 different alleles, including four new ones. Among the novel mutations, three (p.R70Q, p.R73K, and p.R79P) were identified in exon 1 and p.L359P in exon 6. The sequence analysis also detected six different single nucleotide polymorphic variants, including two previously unreported ones, spread throughout non-coding regions (introns 2, 3, 5, 6, and 3′UTR) of the gene. All patients were heterozygous for the mutations, thus confirming their dominant effect.

Original languageEnglish
Pages (from-to)427-433
Number of pages7
JournalClinical Genetics
Volume72
Issue number5
DOIs
Publication statusPublished - Nov 2007

Keywords

  • Alexander disease
  • GFAP
  • Leukoencephalopathy
  • MRI
  • Mutations
  • Neurodegenerative disorder
  • SNPs

ASJC Scopus subject areas

  • Genetics(clinical)
  • Genetics

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    Caroli, F., Biancheri, R., Seri, M., Rossi, A., Pessagno, A., Bugiani, M., Corsolini, F., Savasta, S., Romano, A., Antonelli, C., Romano, A., Pareyson, D., Gambero, P., Uziel, G., Ravazzolo, R., Ceccherini, I., & Filocamo, M. (2007). GFAP mutations and polymorphisms in 13 unrelated Italian patients affected by Alexander disease. Clinical Genetics, 72(5), 427-433. https://doi.org/10.1111/j.1399-0004.2007.00869.x