Novel LMF1 nonsense mutation in a patient with severe hypertriglyceridemia

Rossella Spina, Carlo Maria Barbagallo, Angelo Baldassare Cefalu', Antonio Carroccio, Maurizio Averna, Marja-Riitta Taskinen, Hannele Hilden, Miklós Péterfy, Patrizia Tarugi, Maria Luisa Arpi, Sebastiano Squatrito, Riccardo Vigneri, Fen Yin

Risultato della ricerca: Article

42 Citazioni (Scopus)

Abstract

AbstractCONTEXT: Lipase maturation factor 1 (LMF1) gene is a novel candidate gene in severe hypertriglyceridemia. Lmf1 is involved in the maturation of lipoprotein lipase (LPL) and hepatic lipase in endoplasmic reticulum. To date only one patient with severe hypertriglyceridemia and related disorders was found to be homozygous for a nonsense mutation in LMF1 gene (Y439X).OBJECTIVE: The objective of the study was to investigate LMF1 gene in hypertriglyceridemic patients in whom mutations in LPL, APOC2, and APOA5 genes had been excluded.RESULTS: The resequencing of LMF1 gene led to the discovery of a novel homozygous nonsense mutation in one patient with severe hypertriglyceridemia and recurrent episodes of pancreatitis. The mutation causes a G>A substitution in exon 9 (c.1395G>A), leading to a premature stop codon (W464X). LPL activity and mass were reduced by 76 and 50%, respectively, compared with normolipidemic controls. The proband over the years has shown a good response to treatment. The proband's son, heterozygous for the W464X, shows normal plasma triglyceride levels.CONCLUSIONS: We identified the second novel pathogenic mutation in LMF1 gene in a patient with severe hypertriglyceridemia. LPL deficiency in our patient was milder than in the carrier of the Y439X previously described.
Lingua originaleEnglish
pagine (da-a)4584-4590
Numero di pagine7
RivistaTHE JOURNAL OF CLINICAL ENDOCRINOLOGY AND METABOLISM
Volume2009-11
Stato di pubblicazionePublished - 2009

All Science Journal Classification (ASJC) codes

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Endocrinology
  • Clinical Biochemistry
  • Biochemistry, medical

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    Spina, R., Barbagallo, C. M., Cefalu', A. B., Carroccio, A., Averna, M., Taskinen, M-R., Hilden, H., Péterfy, M., Tarugi, P., Arpi, M. L., Squatrito, S., Vigneri, R., & Yin, F. (2009). Novel LMF1 nonsense mutation in a patient with severe hypertriglyceridemia. THE JOURNAL OF CLINICAL ENDOCRINOLOGY AND METABOLISM, 2009-11, 4584-4590.