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Updated: Jul 16, 2025
LDL Cholesterol Uptake Assay Using Live Cell Imaging Analysis with Cell Health Monitoring
Published on: November 17, 2018
High-Throughput Microscopy Characterization of Rare LDLR Variants
Rafael Graça1,2, Magdalena Zimon3,4, Ana C Alves1,2
1Unidade de Investigação e Desenvolvimento, Grupo de Investigação Cardiovascular, Departamento de Promoção da Saúde e Prevenção de Doenças Não Transmissíveis, Instituto Nacional de Saúde Doutor Ricardo Jorge, Lisbon, Portugal.
Insights
Familial hypercholesterolemia (FH) diagnosis is hindered by unknown LDLR gene variants. A new high-throughput assay functionally profiles these variants, distinguishing disruptive from silent mutations for accurate FH diagnosis.
Area of Science:
- Genetics
- Biochemistry
- Cardiovascular Medicine
Background:
- Familial hypercholesterolemia (FH) is a prevalent, inherited lipid metabolism disorder.
- Early FH diagnosis and treatment are crucial for reducing long-term cardiovascular risk.
- Variants of unknown significance in the LDLR gene impede definitive FH diagnosis.
Purpose of the Study:
- To develop a high-throughput, cost-effective cell-based assay for functional profiling of LDLR variants.
- To differentiate disruptive LDLR variants from silent ones, aiding FH diagnosis.
Main Methods:
- Established a high-throughput cell-based assay.
- Functionally profiled LDLR variants.
- Discriminated between disruptive and silent variants.
Main Results:
- Successfully developed a time- and cost-effective assay.
- The assay effectively distinguished disruptive LDLR variants from silent ones.
- Generated a resource for systematic functional characterization of LDLR variants.
Conclusions:
- The developed assay overcomes a major obstacle in achieving definitive FH diagnosis.
- This functional profiling approach aids in identifying patients with pathogenic LDLR variants.
- The study provides a valuable tool for FH diagnosis and management.
Abstract:
Familial hypercholesterolemia (FH) is the most common inherited life-threatening disorder of lipid metabolism. Early diagnosis and treatment are the key to reduce the cumulative life-long cardiovascular burden of patients with FH. The high number of LDLR variants described as variants of unknown significance is the largest obstacle to achieve a definitive FH diagnosis. This study established a time- and cost-effective high-throughput cell-based assay to functionally profile LDLR variants, which allowed us to discriminate disruptive rare variants from silent ones. This work generated a valuable resource for systematic functional characterization of LDLR variants solving 1 of the major issues to achieve a definitive FH diagnosis.
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