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Genetic regulation of atherosclerotic plaque size and morphology in the innominate artery of hyperlipidemic mice.


ABSTRACT: We sought to determine the genetic factors contributing to atherosclerotic plaque size and cellular composition in the innominate artery, a murine model of advanced atherosclerosis.We examined genetic contributions to innominate atherosclerotic plaque size and cellular composition in an intercross between C57BL/6J.Apoe(-/-), a strain susceptible to aortic lesions, and C3H/HeJ.Apoe(-/-), a strain resistant to aortic lesions. Surprisingly, total innominate lesion size was similar in the two strains. Genetic analyses identified one novel locus on Chromosome 2 for innominate artery lesion size, a significant locus for fibrous cap thickness on Chromosome 15, and several suggestive loci for cellular composition, all distinct from loci influencing aortic lesions. The Chromosome 2 locus contains a candidate, CD44. We show that CD44 is expressed in the innominate artery and differs strikingly in expression between the parental strains.Multiple aspects of innominate lesion composition are genetically determined, but in a manner largely independent of the genetic contributions to aortic lesions.

SUBMITTER: Bennett BJ 

PROVIDER: S-EPMC2704985 | biostudies-literature | 2009 Mar

REPOSITORIES: biostudies-literature

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Genetic regulation of atherosclerotic plaque size and morphology in the innominate artery of hyperlipidemic mice.

Bennett Brian J BJ   Wang Susanna S SS   Wang Xuping X   Wu Xiaohui X   Lusis Aldons J AJ  

Arteriosclerosis, thrombosis, and vascular biology 20090102 3


<h4>Objective</h4>We sought to determine the genetic factors contributing to atherosclerotic plaque size and cellular composition in the innominate artery, a murine model of advanced atherosclerosis.<h4>Methods and results</h4>We examined genetic contributions to innominate atherosclerotic plaque size and cellular composition in an intercross between C57BL/6J.Apoe(-/-), a strain susceptible to aortic lesions, and C3H/HeJ.Apoe(-/-), a strain resistant to aortic lesions. Surprisingly, total innomi  ...[more]

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