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The molecular basis of familial hypercholesterolaemia in Turkish patients.

Sözen, MM; Whittall, R; Oner, C; Tokatli, A; Kalkanoğlu, HS; Dursun, A; Coşkun, T; ... Humphries, SE; + view all (2005) The molecular basis of familial hypercholesterolaemia in Turkish patients. Atherosclerosis , 180 (1) pp. 63-71. 10.1016/j.atherosclerosis.2004.12.042.

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Familial hypercholesterolaemia (FH) is an autosomal dominant disorder of lipoprotein metabolism. In the majority of patients FH is caused by mutations in the gene for the low-density lipoprotein receptor (LDLR), and to date more than 700 mutations have been reported worldwide. In this study, 36 paediatric patients with a clinical diagnosis of FH (20 homozygous and 16 heterozygotes) were screened for mutations in the LDLR gene. Each exon, with intron-exon junctions, was screened by capillary fluorescent SSCP (F-SSCP) and heteroduplex analysis. Samples showing different band patterns were sequenced. Ten novel (including three frame shift small deletions or insertions) and seven known mutations were detected. A total of 37 out of the predicted 56 FH-causing alleles were identified (66.1%). No patients with the R3500Q mutation in the APOB gene were found. W556R was the most common mutation, explaining 21.4% of the predicted defective LDLR alleles. The novel sequence changes were deemed to be pathogenic if they altered a conserved amino acid (L143P, D147E, Q233H-C234G, C347G) or occurred in or close to a splice site (IVS 16+5) and were absent in DNA from 50 healthy Turkish subjects. These data confirm the genetic heterogeneity of FH in Turkey, and demonstrate the usefulness of F-SSCP for mutation detection.

Type: Article
Title: The molecular basis of familial hypercholesterolaemia in Turkish patients.
Location: Ireland
DOI: 10.1016/j.atherosclerosis.2004.12.042
Keywords: Adolescent, Child, Child, Preschool, Frameshift Mutation, Gene Deletion, Genetic Heterogeneity, Genetic Testing, Humans, Hyperlipoproteinemia Type II, Polymorphism, Single-Stranded Conformational, Receptors, LDL, Turkey
URI: http://discovery.ucl.ac.uk/id/eprint/97304
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