Identification of a novel LMF1 nonsense mutation responsible for severe hypertriglyceridemia by targeted next-generation sequencing

Maurizio Averna, Rossella Spina, Chiara Scrimali, Valeria Ingrassia, Gabriella Misiano, Grazia Ida Altieri, Carlo Maria Barbagallo, Ornella Palesano, Gianfranco Cocorullo, Antonina Giammanco, Angelo Baldassare Cefalu', Vincenza Valenti, Vincenza Valenti, Rossella Spina, Angelo B. Cefalù, Valeria Ingrassia, Chiara Scrimali, Gabriella Misiano, Maurizio R. Averna, Antonina GanciDavide Noto, Francesca Fayer

Risultato della ricerca: Articlepeer review

12 Citazioni (Scopus)

Abstract

Background Severe hypertriglyceridemia (HTG) may result from mutations in genes affecting the intravascular lipolysis of triglyceride (TG)-rich lipoproteins. Objective The aim of this study was to develop a targeted next-generation sequencing panel for the molecular diagnosis of disorders characterized by severe HTG. Methods We developed a targeted customized panel for next-generation sequencing Ion Torrent Personal Genome Machine to capture the coding exons and intron/exon boundaries of 18 genes affecting the main pathways of TG synthesis and metabolism. We sequenced 11 samples of patients with severe HTG (TG>885 mg/dL–10 mmol/L): 4 positive controls in whom pathogenic mutations had previously been identified by Sanger sequencing and 7 patients in whom the molecular defect was still unknown. Results The customized panel was accurate, and it allowed to confirm genetic variants previously identified in all positive controls with primary severe HTG. Only 1 patient of 7 with HTG was found to be carrier of a homozygous pathogenic mutation of the third novel mutation of LMF1 gene (c.1380C>G–p.Y460X). The clinical and molecular familial cascade screening allowed the identification of 2 additional affected siblings and 7 heterozygous carriers of the mutation. Conclusions We showed that our targeted resequencing approach for genetic diagnosis of severe HTG appears to be accurate, less time consuming, and more economical compared with traditional Sanger resequencing. The identification of pathogenic mutations in candidate genes remains challenging and clinical resequencing should mainly intended for patients with strong clinical criteria for monogenic severe HTG.
Lingua originaleEnglish
pagine (da-a)272-281
Numero di pagine10
RivistaJournal of Clinical Lipidology
Volume11
Stato di pubblicazionePublished - 2017

All Science Journal Classification (ASJC) codes

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics
  • Cardiology and Cardiovascular Medicine

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