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Children with Severe Hypercholesterolemia Caused by a Pathogenic Mutation in ABCG5.
Hayato Tada1, Hirofumi Okada1, Akihiro Nomura1
1Department of Cardiology, Kanazawa University Graduate School of Medicine, Japan.
Internal Medicine (Tokyo, Japan)
|June 15, 2022
Summary
Pathogenic mutations in ABCG5 cause severe hypercholesterolemia in infants, particularly when breastfed. Dietary changes and ezetimibe effectively lowered low-density lipoprotein (LDL) cholesterol levels in affected patients.
Area of Science:
- Biochemistry
- Genetics
- Pediatrics
Background:
- Familial hypercholesterolemia is a genetic disorder characterized by extremely high LDL cholesterol.
- The ATP-binding cassette sub-family G member 5 (ABCG5) gene plays a crucial role in cholesterol transport.
Observation:
- Three infants with severe hypercholesterolemia, exclusively breastfed, showed decreased LDL cholesterol after weaning.
- An 8-year-old girl with suspected familial hypercholesterolemia also had pathogenic ABCG5 mutations.
Findings:
- Genetic sequencing identified pathogenic mutations in the ABCG5 gene in all studied patients.
- A cholesterol-reduced diet significantly lowered LDL cholesterol levels.
- Ezetimibe administration proved beneficial in managing hypercholesterolemia.
Implications:
- This study highlights ABCG5 mutations as a cause of severe infantile hypercholesterolemia.
- Early diagnosis and targeted interventions, including diet and medication, are crucial for managing this condition.
- Understanding the role of ABCG5 in cholesterol metabolism can inform future therapeutic strategies.
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