Liver gene expression associated with diet and lesion development in atherosclerosis-prone mice: induction of components of alternative complement pathway

Physiological Genomics
Adrian RecinosAllan R Brasier

Abstract

Diet-induced changes in serum lipoproteins are a major risk factor for the development of atherosclerosis, the leading cause of mortality in Westernized countries. Atherosclerosis is now appreciated to be a systemic inflammatory disease where increased synthesis of inducible proteins by the liver, such as C-reactive protein (CRP) and others, may play roles in accelerating the disease process. To systematically investigate the genetic response of the liver to diet-induced atherosclerosis, we applied high-density microarray technology in a mouse model of atherosclerosis (LDLR-/- mouse). LDLR-/- mice and congenic (LDLR+/+) controls were placed on low-fat (LF) or high-fat (HF) Western-style diets. The Western diet produced sustained elevations in total cholesterol (2.5-fold for LDLR+/+, 5.0-fold LDLR-/-) relative to the respective LF groups. Tissues were harvested after 12 wk when significant atherosclerotic lesion development was first detectable by en face histomorphometry of oil red O-stained aortas. Diet, rather than genotype, was most highly associated with development of atherosclerotic lesions. Liver mRNA expression profiles of triplicate animals from each group were determined by high-density oligonucleotide microarrays; an...Continue Reading

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