Apolipoproteins EMice, KnockoutAtherosclerosisArteriosclerosisAortaMice, Inbred C57BLLipoproteinsCholesterolDiet, AtherogenicDisease Models, AnimalMacrophagesCells, CulturedApolipoprotein E3Gene Knockout TechniquesApolipoprotein E4Apolipoprotein E2Mice, TransgenicGenotypePhenotypeGene TargetingGene DeletionMice, 129 StrainReceptors, LDLSignal TransductionRNA, MessengerGene Expression RegulationBrainLiver