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Genetics of Hypertriglyceridemia.

Jacqueline S Dron1, Robert A Hegele1

  • 1Departments of Medicine and Biochemistry, Schulich School of Medicine and Dentistry, Robarts Research Institute, Western University, London, ON, Canada.

Frontiers in Endocrinology
|August 15, 2020
PubMed
Summary
This summary is machine-generated.

Hypertriglyceridemia genetics are complex, involving rare variants causing severe familial chylomicronemia syndrome (FCS) and common variants contributing to multifactorial chylomicronemia (MCM). Understanding these genetic factors is crucial for managing cardiovascular and metabolic health.

Keywords:
autosomal recessivecomplex traitfamilial chylomicronemia syndrome (FCS)multifactoriel chylomicronemia (MCM)polygenic scoretriglyceride

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Isolation and Analysis of Plasma Lipoproteins by Ultracentrifugation
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Area of Science:

  • Genetics
  • Metabolic Diseases
  • Cardiovascular Medicine

Background:

  • Hypertriglyceridemia is a common yet complex metabolic disorder.
  • Genetic factors significantly influence hypertriglyceridemia, ranging from severe to mild forms.
  • Familial chylomicronemia syndrome (FCS) and multifactorial chylomicronemia (MCM) represent distinct genetic etiologies.

Purpose of the Study:

  • To elucidate the complex genetic underpinnings of hypertriglyceridemia.
  • To differentiate the genetic basis of severe FCS from the more common MCM.
  • To explore the role of various genetic variants, including rare and common ones, in hypertriglyceridemia susceptibility.

Main Methods:

  • Analysis of genetic variants, including single-nucleotide and copy number variants.
  • Identification of homozygous/biallelic loss-of-function variants in key genes (LPL, APOC2, APOA5, LMF1, GPIHBP1) for FCS.
  • Assessment of rare heterozygous variants and common variants using polygenic scores for MCM.

Main Results:

  • Severe hypertriglyceridemia (FCS) is linked to biallelic loss-of-function variants in specific genes.
  • Multifactorial chylomicronemia (MCM) arises from rare heterozygous variants and common variants quantified by polygenic scores.
  • Evidence suggests complex genetic predispositions in related conditions like combined hyperlipidemia.

Conclusions:

  • Hypertriglyceridemia exhibits complex genetic heterogeneity.
  • Distinguishing between FCS and MCM genetic causes is essential.
  • Future research should investigate the clinical impact of genetic predispositions and explore novel genetic and non-genomic contributors.