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- W1538996896 abstract "Abstract. Surendran RP, Visser ME, Heemelaar S, Wang J, Peter J, Defesche JC, Kuivenhoven JA, Hosseini M, Péterfy M, Kastelein JJP, Johansen CT, Hegele RA, Stroes ESG, Dallinga‐Thie GM (Academic Medical Center, Amsterdam, the Netherlands; Robarts Research Institute, University of Western Ontario, London, Ontario, Canada; UCLA, University of California; Medical Genetics Institute, Cedars‐Sinai Medical Center, Los Angeles, CA, USA). Mutations in LPL, APOC2, APOA5, GPIHBP1 and LMF1 in patients with severe hypertriglyceridaemia. J Intern Med 2012; 272 : 185–196. Objectives. The severe forms of hypertriglyceridaemia (HTG) are caused by mutations in genes that lead to the loss of function of lipoprotein lipase (LPL). In most patients with severe HTG (TG > 10 mmol L −1 ), it is a challenge to define the underlying cause. We investigated the molecular basis of severe HTG in patients referred to the Lipid Clinic at the Academic Medical Center Amsterdam. Methods. The coding regions of LPL , APOC2 , APOA5 and two novel genes, lipase maturation factor 1 ( LMF1 ) and GPI‐anchored high‐density lipoprotein (HDL)‐binding protein 1 ( GPIHBP1 ), were sequenced in 86 patients with type 1 and type 5 HTG and 327 controls. Results. In 46 patients (54%), rare DNA sequence variants were identified, comprising variants in LPL ( n = 19), APOC2 ( n = 1), APOA5 ( n = 2), GPIHBP1 ( n = 3) and LMF1 ( n = 8). In 22 patients (26%), only common variants in LPL (p.Asp36Asn, p.Asn318Ser and p.Ser474Ter) and APOA5 (p.Ser19Trp) could be identified, whereas no mutations were found in 18 patients (21%) . In vitro validation revealed that the mutations in LMF1 were not associated with compromised LPL function. Consistent with this, five of the eight LMF1 variants were also found in controls and therefore cannot account for the observed phenotype. Conclusions. The prevalence of mutations in LPL was 34% and mostly restricted to patients with type 1 HTG. Mutations in GPIHBP1 ( n = 3), APOC2 ( n = 1) and APOA5 ( n = 2) were rare but the associated clinical phenotype was severe. Routine sequencing of candidate genes in severe HTG has improved our understanding of the molecular basis of this phenotype associated with acute pancreatitis and may help to guide future individualized therapeutic strategies." @default.
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- W1538996896 date "2012-02-13" @default.
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- W1538996896 title "Mutations in<i>LPL</i>,<i>APOC2</i>,<i>APOA5</i>,<i>GPIHBP1</i>and<i>LMF1</i>in patients with severe hypertriglyceridaemia" @default.
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- W1538996896 doi "https://doi.org/10.1111/j.1365-2796.2012.02516.x" @default.
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