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Genetics of type III hyperlipoproteinemia
G Feussner1, S Piesch, J Dobmeyer
1Abteilung Innere Medizin I, Medizinische Universitätsklinik Heidelberg, Germany.
Genetic Epidemiology
|January 1, 1997
Summary
Type III hyperlipoproteinemia (HLP) may stem from multiple genetic factors beyond apoE2. This study suggests additional genes contribute to HLP development in affected families, highlighting a multifactorial disease origin.
Area of Science:
- Genetics
- Metabolic Disorders
- Cardiovascular Research
Background:
- Type III hyperlipoproteinemia (HLP) is a primary lipoprotein disorder.
- The apolipoprotein E (apoE) E2/2 phenotype is associated with HLP.
- The genetic basis of HLP is not fully understood.
Purpose of the Study:
- To investigate the occurrence of hyperlipidemia in relatives of HLP patients.
- To identify potential additional genetic factors contributing to HLP.
- To confirm and extend previous findings on the multifactorial genesis of HLP.
Main Methods:
- Studied 147 relatives of 43 patients with classical type III HLP and apoE2/2 phenotype.
- Analyzed pedigrees for prevalent dyslipidemia and genetic contributions.
- This represents the largest family study for type III HLP to date.
Main Results:
- Primary dyslipidemia was prevalent in 12 out of 43 pedigrees.
- Genes for familial combined hyperlipidemia, familial hypertriglyceridemia, and familial hypercholesterolemia were suspected in these kindreds.
- Confirmed multifactorial genesis of HLP.
Conclusions:
- Homozygosity for apoE2 alone may not explain all cases of type III HLP.
- Additional genes for familial lipoprotein disorders likely contribute to HLP pathogenesis.
- HLP results from a complex interplay of genetic factors.