Quantification and genotyping of lipoprotein lipase in patients with diabetic lipaemia

• DOI: 10.1111/dme.12565
• Publication Date: 2014-08-16T09:47:37Z
• Authors: A. Radhakutty; J. Shen; A. J. Hooper; S. A. Miller; J. R. Burnett; P. M. Mah; M. G. Burt; M. P. Doogue
• Keywords: Adult; Male; Genotype; Hyperlipidemias; Diabetic Ketoacidosis; Young Adult; 03 medical and health sciences; 616; Diabetes Mellitus; Humans; Aged; Receptors, Lipoprotein; Retrospective Studies; Hypertriglyceridemia; 0303 health sciences; Cholesterol, HDL; Middle Aged; 3. Good health; Lipoprotein Lipase; Diabetes Mellitus, Type 1; Diabetes Mellitus, Type 2; Case-Control Studies; Mutation; Apolipoprotein C-II; Female; Type 2; Type 1

AbstractAimsTo determine if diabetic lipaemia is caused by loss of function mutations in the lipoprotein lipase gene, LPL.MethodsWe conducted a case–control study over 2 years in two tertiary care hospitals in South Australia. Six patients with a history of diabetic lipaemia and 12 control subjects, with previous diabetic ketoacidosis and peak triglyceride concentrations < 2.4 mmol/l were included. Participants were well at the time of study investigations.ResultsOnly one patient with lipaemia had a loss of function mutation in LPL and no functional mutations in APOC2 or GPIHBP1 were identified. The mean lipoprotein lipase concentration was lower in patients with diabetic lipaemia than in control subjects (306 vs 484 μg/l, P = 0.04). The mean fasting C‐peptide concentration was higher in patients with diabetic lipaemia than in control subjects (771 vs 50 pmol/l; P = 0.001).ConclusionsLipoprotein lipase deficiency in patients with a history of diabetic lipaemia was predominantly quantitative, rather than secondary to mutations in LPL, APOC2 or GPIHBP1. The majority of patients with severe hypertriglyceridaemia in diabetic ketoacidosis may have ketosis‐prone Type 2, rather than Type 1, diabetes.