Functional Characterization of a CRH Missense Mutation Identified in an ADNFLE Family

Veronica Sansoni, Matilde Forcella, Alessandra Mozzi, Paola Fusi, Roberto Ambrosini, Luigi Ferini-Strambi, Romina Combi

Research output: Contribution to journalArticlepeer-review

Abstract

Nocturnal frontal lobe epilepsy has been historically considered a channelopathy caused by mutations in subunits of the neuronal nicotinic acetylcholine receptor or in a recently reported potassium channel. However, these mutations account for only a minority of patients, and the existence of at least a new locus for the disease has been demonstrated. In 2005, we detected two nucleotide variations in the promoter of the CRH gene coding for the corticotropin releasing hormone in 7 patients. These variations cosegregated with the disease and were demonstrated to alter the cellular levels of this hormone. Here, we report the identification in an Italian affected family of a novel missense mutation (hpreproCRH p.Pro30Arg) located in the region of the CRH coding for the protein pro-sequence. The mutation was detected in heterozygosity in the two affected individuals. In vitro assays demonstrated that this mutation results in reduced levels of protein secretion in the short time thus suggesting that mutated people could present an altered capability to respond immediately to stress agents.

Original languageEnglish
Article numbere61306
JournalPLoS One
Volume8
Issue number4
DOIs
Publication statusPublished - Apr 11 2013

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

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