Clinically applicable mutation screening in familial hypercholesterolemia

Henrik Nissen*, Per Guldberg, Annebirthe Bo Hansen, Niels Erik Petersen, Mogens Hørder

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Mutations in the LDL receptor (LDLR) gene and the codon 3500 region of the apolipoprotein (apo) B-100 gene result in the clinically indistinguishable phenotypes designated familial hypercholesterolemia (FH) and familial defective apo B-100 (FDB), respectively. Introduction of genetic diagnosis in phenotypic FH families may remove the diagnostic inaccuracies known from traditional clinical/biochemical FH diagnosis and allow more differentiated prognostic evaluations and genetic counseling of FH/FDB families. Previous genetic screening methods for FH have, however, been too cumbersome for routine use, however. To overcome these problems, we designed a mutation screening assay based on the highly sensitive denaturing gradient gel electrophoresis (DGGE) technique. The setup allows within 24 hr to pinpoint if and where a potential mutation is located in the LDLR promoter, the 18 LDLR gene exons and corresponding intronic splice site sequences, or in the codon 3500 region of apo B-100. The pinpointed region is subsequently sequenced. As an evaluation of the sensitivity, we demonstrated the ability of the assay to detect 27 different mutations or pelymorphisms covering all the examined regions, except LDLR exon 16. In conclusion, a simple, but sensitive, clinically applicable mutation screening assay based on the DGGE principle may reveal the underlying mutation in most FH/FDB families and offer a tool for a more differentiated prognostic and therapeutic evaluation in FH/FDB.

Original languageEnglish
JournalHuman Mutation
Volume8
Issue number2
Pages (from-to)168-177
Number of pages10
ISSN1059-7794
DOIs
Publication statusPublished - 22. Aug 1996

Keywords

  • Diagnostics
  • Familial hypercholesterolemia
  • Genetics

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