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High density lipoprotein (HDL) is the major plasma lipoprotein found in mice fed normal laboratory chow containing 4% fat. When female mice from some inbred strains, such as C57BL/6, are fed a high fat diet (1.25% cholesterol, 15% fat, and 0.5% cholic acid), the levels of HDL-cholesterol decrease by about 50%, and lipid staining lesions form in the aorta within 14 weeks. In other strains of mice, such as C3H and BALB/c, HDL-lipid levels decrease only slightly, and few or no aortic lesions are observed at 14 weeks.

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