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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+Genet
2015 ; 11
(12
): e1005711
Nephropedia Template TP
gab.com Text
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Genetic Architecture of Atherosclerosis in Mice: A Systems Genetics Analysis of
Common Inbred Strains
#MMPMID26694027
Bennett BJ
; Davis RC
; Civelek M
; Orozco L
; Wu J
; Qi H
; Pan C
; Packard RR
; Eskin E
; Yan M
; Kirchgessner T
; Wang Z
; Li X
; Gregory JC
; Hazen SL
; Gargalovic PS
; Lusis AJ
PLoS Genet
2015[Dec]; 11
(12
): e1005711
PMID26694027
show ga
Common forms of atherosclerosis involve multiple genetic and environmental
factors. While human genome-wide association studies have identified numerous
loci contributing to coronary artery disease and its risk factors, these studies
are unable to control environmental factors or examine detailed molecular traits
in relevant tissues. We now report a study of natural variations contributing to
atherosclerosis and related traits in over 100 inbred strains of mice from the
Hybrid Mouse Diversity Panel (HMDP). The mice were made hyperlipidemic by
transgenic expression of human apolipoprotein E-Leiden (APOE-Leiden) and human
cholesteryl ester transfer protein (CETP). The mice were examined for lesion size
and morphology as well as plasma lipid, insulin and glucose levels, and blood
cell profiles. A subset of mice was studied for plasma levels of metabolites and
cytokines. We also measured global transcript levels in aorta and liver. Finally,
the uptake of acetylated LDL by macrophages from HMDP mice was quantitatively
examined. Loci contributing to the traits were mapped using association analysis,
and relationships among traits were examined using correlation and statistical
modeling. A number of conclusions emerged. First, relationships among
atherosclerosis and the risk factors in mice resemble those found in humans.
Second, a number of trait-loci were identified, including some overlapping with
previous human and mouse studies. Third, gene expression data enabled enrichment
analysis of pathways contributing to atherosclerosis and prioritization of
candidate genes at associated loci in both mice and humans. Fourth, the data
provided a number of mechanistic inferences; for example, we detected no
association between macrophage uptake of acetylated LDL and atherosclerosis.
Fifth, broad sense heritability for atherosclerosis was much larger than narrow
sense heritability, indicating an important role for gene-by-gene interactions.
Sixth, stepwise linear regression showed that the combined variations in plasma
metabolites, including LDL/VLDL-cholesterol, trimethylamine N-oxide (TMAO),
arginine, glucose and insulin, account for approximately 30 to 40% of the
variation in atherosclerotic lesion area. Overall, our data provide a rich
resource for studies of complex interactions underlying atherosclerosis.
|*Inbreeding
[MESH]
|*Quantitative Trait Loci
[MESH]
|Animals
[MESH]
|Aorta/metabolism/pathology
[MESH]
|Apolipoproteins E/genetics/metabolism
[MESH]
|Atherosclerosis/*genetics/pathology
[MESH]
|Cholesterol Ester Transfer Proteins/*genetics/metabolism
[MESH]