Patterns of novel alleles and genotype/phenotype correlations resulting from the analysis of 108 previously undetected mutations in patients affected by neurofibromatosis type I

Francesco Bonatti, Alessia Adorni, Annalisa Matichecchia, Paola Mozzoni, Vera Uliana, Francesco Pisani, Livia Garavelli, Claudio Graziano, Maria Gnoli, Diana Carli, Stefania Bigoni, Elena Boschi, Davide Martorana, Antonio Percesepe

Research output: Contribution to journalArticlepeer-review

Abstract

Neurofibromatosis type I, a genetic disorder due to mutations in the NF1 gene, is characterized by a high mutation rate (about 50% of the cases are de novo) but, with the exception of whole gene deletions associated with a more severe phenotype, no specific hotspots and few solid genotype/phenotype correlations. After retrospectively re-evaluating all NF1 gene variants found in the diagnostic activity, we studied 108 patients affected by neurofibromatosis type I who harbored mutations that had not been previously reported in the international databases, with the aim of analyzing their type and distribution along the gene and of correlating them with the phenotypic features of the affected patients. Out of the 108 previously unreported variants, 14 were inherited by one of the affected parents and 94 were de novo. Twenty-nine (26.9%) mutations were of uncertain significance, whereas 79 (73.2%) were predicted as pathogenic or probably pathogenic. No differential distribution in the exons or in the protein domains was observed and no statistically significant genotype/phenotype correlation was found, confirming previous evidences.

Original languageEnglish
Article number2071
JournalInternational Journal of Molecular Sciences
Volume18
Issue number10
DOIs
Publication statusPublished - Oct 1 2017

Keywords

  • Genotype/phenotype correlation
  • Neurofibromatosis type I
  • NF1 gene

ASJC Scopus subject areas

  • Catalysis
  • Molecular Biology
  • Spectroscopy
  • Computer Science Applications
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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