heterozygous familial hypercholesterolaemia
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Author(s):  
Hoang Thi Yen ◽  
Vu Duc Anh ◽  
Le Thi Yen ◽  
Dang Thi Ngoc Dung

Background: Familial hypercholesterolemia (FH) is an autosomal dominant disorder of lipoprotein metabolism characterized by high levels of LDL-cholesterol (LDL-C) in the blood. Studies identified more than 1,000 mutations of the LDLR gene in FH patients with incidence rates between 1: 500 and 1: 300. The mutation that occurs primarily in: LDLR, apoB, PCSK9, LDLRAP1 genes, 80% of which were detected the LDLR gene mutation. Nowaday, FH disease has not been paid much attention, leading to a delay in treatment.  Objectives: identify mutations in other family members of the patient FH.  Subjects and Methods: 14 family members of FH patients were gene analyzed, identified mutations on exons 4, 9 LDLR genes. Results: 11/15 family members carrying heterozygous mutations on exon 4 and exon 9 of LDLR gene. Patient and 1 family member detected and treated late, leading to complications of myocardial infarction. Conclusion: Therefore, Cascade screening of patient's family members has an important role in early detection, genetic counseling and treatment, even in cases where pedigree members do not have xanthomas and no increase or slight increase in blood lipids. This is the basis for early counseling and treatment for members with mutations, reducing the risk of coronary artery diseases in the future.


2021 ◽  
Vol 10 (21) ◽  
pp. 4930
Author(s):  
Bojko Bjelakovic ◽  
Claudia Stefanutti ◽  
Željko Reiner ◽  
Gerald F. Watts ◽  
Patrick Moriarty ◽  
...  

Heterozygous familial hypercholesterolaemia (FH) is among the most common genetic metabolic lipid disorders characterised by elevated low-density lipoprotein cholesterol (LDL-C) levels from birth and a significantly higher risk of developing premature atherosclerotic cardiovascular disease. The majority of the current pediatric guidelines for clinical management of children and adolescents with FH does not consider the impact of genetic variations as well as characteristics of vascular phenotype as assessed by recently developed non-invasive imaging techniques. We propose a combined integrated approach of cardiovascular (CV) risk assessment and clinical management of children with FH incorporating current risk assessment profile (LDL-C levels, traditional CV risk factors and familial history) with genetic and non-invasive vascular phenotyping. Based on the existing data on vascular phenotype status, this panel recommends that all children with FH and cIMT ≥0.5 mm should receive lipid lowering therapy irrespective of the presence of CV risk factors, family history and/or LDL-C levels Those children with FH and cIMT ≥0.4 mm should be carefully monitored to initiate lipid lowering management in the most suitable time. Likewise, all genetically confirmed children with FH and LDL-C levels ≥4.1 mmol/L (160 mg/dL), should be treated with lifestyle changes and LLT irrespective of the cIMT, presence of additional RF or family history of CHD


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