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Molecular genetics of familial hypercholesterolemia in Spain: Ten novel LDLR mutations and population analysis
Author(s) -
GarcíaGarcía Ana B.,
Real José T.,
Puig Oscar,
Cebolla Elvira,
MarínGarcía Pablo,
Martínez Ferrandis Jose I.,
GarcíaSogo Magdalena,
Civera Miguel,
Ascaso Juan F.,
Carmena Rafael,
Armengod M. Eugenia,
Chaves F. Javier
Publication year - 2001
Publication title -
human mutation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.981
H-Index - 162
eISSN - 1098-1004
pISSN - 1059-7794
DOI - 10.1002/humu.1218
Subject(s) - biology , genetics , familial hypercholesterolemia , mutation , gene , population , proband , exon , single strand conformation polymorphism , apolipoprotein b , gene mutation , microbiology and biotechnology , cholesterol , endocrinology , medicine , environmental health
Mutations underlying FH in Spain are largely unknown because only a few and limited surveys have been carried out on Spanish FH patients up to now. To gain information on this issue, we have analysed a group of 113 unrelated Spanish FH patients from an eastern area of Spain (Valencian Community). We have screened the LDLR gene by Southern blot and PCR‐SSCP analysis to detect large rearrangements and small mutations, respectively. In addition, we have screened the Apo B gene for mutations known to cause FDB by PCR‐SSCP analysis. We have identified a total of 47 different mutations in the LDLR gene (5 large rearrangements, and 42 small mutations, which were characterized by DNA sequencing), 19 of which have not been described in other populations (Valencia‐1 to ‐4, 112insA, P160R, 790DelATGA, 920insTCAG, G642E, and the ten novel mutations E246A, 884delT, I289T, S305F, Q328X, Y354C, I603del, 2312‐3C>A, V779M, and N804K). Three of these mutations (15%) were present in more than 1 proband, being mutation 112insA the most prevalent (frequency ∼ 8%) in our sample. The Apo B gene R3500Q mutation was found in only one patient and no underlying defect was found in about 27% of patients. Our data support the notion that Spaniards represent a heterogeneous population with its own spectrum of LDLR gene mutations and that, in our population, FDB has a lower frequency or a milder expression than in central Europe countries. © Wiley‐Liss, Inc.