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Two novel mutations in the LDL receptor gene: common causes of familial hypercholesterolemia in a Spanish population. 1996

A Cenarro, and H K Jensen, and F Civeira, and E Casao, and J Ferrando, and J González-Bonillo, and M Pocoví, and N Gregersen
Center for Medical Molecular Biology, Aarhus University Hospital, Denmark.

In our investigation of the LDL receptor gene in 30 Spanish patients, who were clinically diagnosed as heterozygous FH and were unrelated, we have applied single strand conformation polymorphism (SSCP) analysis and solid-phase sequencing. We identified two novel pathogenic mutations accounting for one third of the FH in this patient sample. Six patients were found to have a G to T substitution at nucleotide position 91 in exon 2 that results in a stop codon, E10X. Four patients were found to have a G deletion at nucleotide 518 in exon 4, causing a translational frameshift and a stop codon, 518delG. We have developed two polymerase chain reaction (PCR) based assays to detect easily these two mutations in all the available family members. We found fourteen E10X mutation carriers and eighteen 518delG mutation carriers. There was no statistically significant difference in mean lipid levels between carriers of these two mutations. Furthermore, haplotype analysis revealed that all E10X mutation carriers had the allele determined by TaqI-, StuI+, AvaII+, NcoI- and all 518delG mutation carriers had the haplotype TaqI-, StuI+, AvaII-, NcoI+. This indicates that both mutations may have been inherited from common ancestors, respectively.

UI MeSH Term Description Entries
D008055 Lipids A generic term for fats and lipoids, the alcohol-ether-soluble constituents of protoplasm, which are insoluble in water. They comprise the fats, fatty oils, essential oils, waxes, phospholipids, glycolipids, sulfolipids, aminolipids, chromolipids (lipochromes), and fatty acids. (Grant & Hackh's Chemical Dictionary, 5th ed) Lipid
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D009154 Mutation Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations. Mutations
D010375 Pedigree The record of descent or ancestry, particularly of a particular condition or trait, indicating individual family members, their relationships, and their status with respect to the trait or condition. Family Tree,Genealogical Tree,Genealogic Tree,Genetic Identity,Identity, Genetic,Family Trees,Genealogic Trees,Genealogical Trees,Genetic Identities,Identities, Genetic,Tree, Family,Tree, Genealogic,Tree, Genealogical,Trees, Family,Trees, Genealogic,Trees, Genealogical
D011973 Receptors, LDL Receptors on the plasma membrane of nonhepatic cells that specifically bind LDL. The receptors are localized in specialized regions called coated pits. Hypercholesteremia is caused by an allelic genetic defect of three types: 1, receptors do not bind to LDL; 2, there is reduced binding of LDL; and 3, there is normal binding but no internalization of LDL. In consequence, entry of cholesterol esters into the cell is impaired and the intracellular feedback by cholesterol on 3-hydroxy-3-methylglutaryl CoA reductase is lacking. LDL Receptors,Lipoprotein LDL Receptors,Receptors, Low Density Lipoprotein,LDL Receptor,LDL Receptors, Lipoprotein,Low Density Lipoprotein Receptor,Low Density Lipoprotein Receptors,Receptors, Lipoprotein, LDL,Receptor, LDL,Receptors, Lipoprotein LDL
D005260 Female Females
D006239 Haplotypes The genetic constitution of individuals with respect to one member of a pair of allelic genes, or sets of genes that are closely linked and tend to be inherited together such as those of the MAJOR HISTOCOMPATIBILITY COMPLEX. Haplotype
D006579 Heterozygote An individual having different alleles at one or more loci regarding a specific character. Carriers, Genetic,Genetic Carriers,Carrier, Genetic,Genetic Carrier,Heterozygotes

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