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Genetic basis of hypertriglyceridemia.

María José Ariza Corbo1, Ovidio Muñiz-Grijalvo2, Agustín Blanco Echevarría3

  • 1Departamento de Medicina y Dermatología, Laboratorio de Lípidos y Aterosclerosis, Centro de Investigaciones Médico Sanitarias (CIMES), Instituto de Investigación Biomédica de Málaga plataforma Bionand (IBIMA), Universidad de Málaga, Málaga, España.

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|December 13, 2024
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Summary

Massive sequencing identifies new familial chylomicronemia syndrome (FCS) cases, primarily in LPL gene variants. Multifactorial chylomicronemia syndrome (MCS) involves common and loss-of-function variants in triglyceride metabolism genes.

Keywords:
Atherosclerotic cardiovascular diseaseEnfermedad cardiovascular ateroscleróticaFamilial chylomicronemiaHipertrigliceridemias gravesMultifactorial chylomicronemiaPancreatitisQuilomicronemia familiarQuilomicronemia multifactorialSevere hypertriglyceridemias

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Area of Science:

  • Genetics
  • Metabolic Disorders
  • Molecular Biology

Background:

  • Familial chylomicronemia syndrome (FCS) and multifactorial chylomicronemia syndrome (MCS) are severe hypertriglyceridemia conditions.
  • Genetic factors play a crucial role in the pathogenesis of these disorders.
  • Advances in sequencing technologies facilitate the identification of genetic variants.

Purpose of the Study:

  • To review the genetic basis of FCS and MCS.
  • To identify genes associated with chylomicronemia.
  • To understand the contribution of different variant types to disease manifestation.

Main Methods:

  • Review of studies identifying genetic variants in FCS and MCS patients.
  • Analysis of variant pathogenicity in key triglyceride metabolism genes.
  • Identification of common and rare variants in canonical and other related genes.

Main Results:

  • New FCS cases identified, predominantly with variants in LPL, GPIHBP1, APOA5, LMF1, and APOC2 genes.
  • MCS pathogenesis involves loss-of-function and common variants in established FCS genes.
  • Other triglyceride metabolism genes harbor variants in MCS patients, but their impact is uncertain.

Conclusions:

  • Genetic analysis is key to diagnosing FCS and understanding MCS.
  • Multiple genes contribute to severe hypertriglyceridemia, with potential for more discoveries.
  • Further research is needed to elucidate the role of other triglyceride metabolism genes in severe hypertriglyceridemia.