Whole Exome Sequencing for Non-selective Pediatric Patients with Hyperlipidemia

Gene
Xuyun HuChanjuan Hao

Abstract

Hyperlipidemia is a group of conditions with abnormally elevated levels of any or all lipids or lipoproteins in the blood. It is highly heterogeneous both genetically and clinically, which contributes to diagnostic challenges and results in many patients to be underdiagnosed and undertreated in China. Precise diagnosis and early management are critical to reduce the incidence of potential coronary artery disease and cardiovascular disease. We performed a single center study to demonstrate the clinical utility of the genome-first approach by whole exome sequencing (WES) for 12 pediatric patients with abnormal lipids or lipoproteins levels. In vitro experiments were performed in COS-7 cells to further evaluate the biological function of the novel variants. We identified ten pathogenic and likely pathogenic variants and three of them were novel. Molecular cause was uncovered in five (41.7%) patients including three lipoprotein lipase deficiency patients, one hypercholesterolemia patient and one sitosterolemia patient. We also found three patients with rare variants of uncertain significance. Copy number variant (CNV) analysis with WES data did not reveal any potential hyperlipidemia related CNVs in all patients. We expanded the mu...Continue Reading

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