Abstract：
:We measured 381 genomewide markers and performed genetic linkage analyses in search of loci influencing coronary artery calcification (CAC), a measure of atherosclerosis determined by electron beam computed tomography, in 948 non-Hispanic white siblings (mean age [+/-standard deviation] = 59.6 +/- 9.9 years; 73.7% hypertensive). Measured risk factors for atherosclerosis included body mass index, pulse pressure, and high-density lipoprotein (HDL)-cholesterol. After adjustment for sex and age, the logarithm transformed measure of CAC was heritable (0.40 +/- 0.08, P < 0.0001) and genetically correlated with body mass index (0.28, P < 0.001), pulse pressure (0.36, P < 0.001), and HDL-cholesterol (-0.19, P < 0.001). Univariate linkage analysis demonstrated evidence of linkage for CAC, defined by maximum LOD scores (MLS) >or= 1.30, on chromosomes 1p, 4p, 5q, 7p, 13q, and 14q. Bivariate linkage analyses of CAC with each risk factor provided evidence of two regions with pleiotropic effects on CAC and HDL-cholesterol on chromosomes 4p16 (MLS=3.03, P = 0.00084) and 9q12 (MLS = 3.21, P = 0.00056), and of a region with pleiotropic effects on CAC and body mass index on chromosome 17p11 (MLS = 3.04, P = 0.00082). Inasmuch as the chromosome 9 and 17 regions were not detected in the univariate linkage analysis for CAC, multivariate linkage analyses of CAC and genetically correlated risk factors may help localize genes for coronary atherosclerosis.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Turner ST,Peyser PA,Kardia SL,Bielak LF,Sheedy PF 3rd,Boerwinkle E,de Andrade Mdoi
10.1016/j.atherosclerosis.2005.06.010keywords:
subject
Has Abstractpub_date
2006-04-01 00:00:00pages
340-6issue
2eissn
0021-9150issn
1879-1484pii
S0021-9150(05)00385-0journal_volume
185pub_type
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