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Published on: September 15, 2018
Molecular basis of familial hypercholesterolemia
Caroline S Bruikman1, Gerard K Hovingh, John J P Kastelein
1Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands.
Insights
Familial hypercholesterolemia (FH) is a genetic disorder causing early heart disease. Understanding its molecular basis, involving over 1700 mutations in key genes, is vital for diagnosis and treatment.
Area of Science:
- Genetics
- Cardiology
- Molecular Biology
Background:
- Familial hypercholesterolemia (FH) is a prevalent genetic condition.
- It is a significant cause of premature coronary heart disease.
- Less than 1% of FH patients are identified globally, despite 1 in 250 individuals having heterozygous FH.
Purpose of the Study:
- To present an overview of the molecular underpinnings of familial hypercholesterolemia.
- To highlight the importance of understanding FH genetics for accurate diagnosis.
Main Methods:
- Review of existing literature on familial hypercholesterolemia genetics.
- Analysis of mutation data from key genes associated with FH.
- Discussion of next-generation sequencing applications in FH research.
Main Results:
- Over 1700 mutations in LDLR, apoB, and PCSK9 genes account for approximately 85% of FH cases.
- Untreated heterozygous FH leads to early coronary heart disease, with high mortality rates from myocardial infarction before age 55.
- Next-generation sequencing is identifying an increasing number of mutations in both known and novel genes linked to the FH phenotype.
Conclusions:
- The genetic basis of familial hypercholesterolemia is complex, involving numerous mutations in specific genes.
- Early identification and understanding of FH molecular basis are critical for preventing premature cardiovascular events.
- Advancements in genetic sequencing technologies are expanding our knowledge of FH-associated genes.
Purpose Of Review:
To provide an overview about the molecular basis of familial hypercholesterolemia.
Recent Findings:
Familial hypercholesterolemia is a common hereditary cause of premature coronary heart disease. It has been estimated that 1 in every 250 individuals has heterozygous familial hypercholesterolemia and that fewer than 1% of patients with familial hypercholesterolemia have been identified across the globe. If heterozygous familial hypercholesterolemia is left untreated, it is likely that coronary heart disease will manifest clinically prior to the age of 55 years and that half of all patients will prematurely die from the consequences of myocardial infarction. It is crucial to understand the molecular basis of familial hypercholesterolemia to diagnose familial hypercholesterolemia properly.
Summary:
The phenotype of familial hypercholesterolemia is caused by more than 1700 mutations the LDLR, apoB and PCSK9 genes, which explains approximately 85% of familial hypercholesterolemia cases. By means of next-generation sequencing, an increasing number of mutations in established and putative novel genes associated with this phenotype have been identified.
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