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Zhonghua Yi Xue Yi Chuan Xue Za Zhi. 2018 Dec 10;35(6):783-786. doi: 10.3760/cma.j.issn.1003-9406.2018.06.001.

[Screening of LDLR gene mutations in nine patients with familial hypercholesterolemia].

[Article in Chinese]

Author information

1
McKusick-Zhang Center for Genetic Medicine and State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100005, China. camsww@hotmail.com.

Abstract

OBJECTIVE:

To screen for LDLR gene mutations in 9 patients with familial hypercholesterolemia (FH).

METHODS:

All exons of the LDLR gene and flanking intronic sequences were amplified by PCR and subjected to automatic DNA sequencing. For patients with homozygous or compound heterozygous mutations, parental DNA sequencing or T cloning sequencing was carried out to determine the parental origin of the mutant alleles.

RESULTS:

Direct sequencing of PCR products revealed 8 LDLR variants in 7 patients, which included c.259T>G, c.513delC, c.530C>T, c.682G>T, c.763C>T, c.1187-10G>A, c.1948delG, and c.1730G>A, among which c.1948delG was novel. Four patients have carried heterozygous mutations, two carried homozygous mutations, and one carried compound heterozygous mutations. The patients with biallelic mutations presented with a more severe phenotype compared those carrying heterozygous mutations.

CONCLUSION:

LDLR mutations were identified in 7 out of 9 patients with FH. Among the 8 identified LDLR mutations, c.1948delG was firstly reported. Above findings have expanded the mutation spectrum of LDLR gene.

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