0000000000077069

AUTHOR

Patricia J. Blanche

showing 4 related works from this author

Effects on lipoprotein subclasses of combined expression of human hepatic lipase and human apoB in transgenic rabbits

2003

Objective— The effects of combined expression of human hepatic lipase (HL) and human apolipoprotein B (apoB) on low-density lipoprotein (LDL) subclasses were examined in rabbits, a species naturally deficient in HL activity. Methods and Results— In apoB-transgenic rabbit plasma, >80% of the protein was found in the 1.006- to 1.050-g/mL fraction. Gradient gel electrophoresis (GGE) of this fraction revealed two distinct species, designated large and small LDL. A denser fraction (d=1.050 to 1.063 g/mL) contained small LDL as well as another discrete LDL subspecies, designated very small LDL. Expression of HL resulted in reductions in protein concentrations in the 1.006- to 1.050-g/mL densi…

medicine.medical_specialtyApolipoprotein BRecombinant Fusion ProteinsTriacylglycerol lipaseAnimals Genetically ModifiedSpecies SpecificityInternal medicineCentrifugation Density GradientmedicineAnimalsHumansTriglyceridesApolipoproteins BGel electrophoresischemistry.chemical_classificationLagomorphabiologyLipasebiology.organism_classificationAnimal FeedSpecific Pathogen-Free OrganismsLipoproteins LDLMolecular WeightEndocrinologyEnzymechemistrybiology.proteinElectrophoresis Polyacrylamide GelFemalelipids (amino acids peptides and proteins)Density gradient ultracentrifugationRabbitsHepatic lipaseCardiology and Cardiovascular MedicineLipoprotein
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Enhanced oxidative susceptibility and reduced antioxidant content of metabolic precursors of small, dense low-density lipoproteins.

2001

Abstract PURPOSE: Elevated plasma concentrations of low-density lipoproteins (LDL) increase risk for coronary heart disease. However, lipoprotein profiles rich in small, dense LDL particles confer greater risk than those that mainly consist of large, buoyant LDL. This may be due, in part, to the greater oxidative susceptibility of small, dense LDL. In the current studies, we tested whether differences in the oxidative behavior of buoyant and dense LDL arise from differences in their immediate metabolic precursors, intermediate-density lipoproteins. SUBJECTS AND METHODS: We compared the properties of intermediate-density lipoproteins and buoyant and dense LDL subfractions in 9 subjects with …

AdultMalemedicine.medical_specialtyAntioxidantParinaric Acidmedicine.medical_treatmentOxidative phosphorylationAntioxidantsReference ValuesInternal medicineMedicineHumansPolyacrylamide gel electrophoresisFluorescent DyesIntermediate-density lipoproteinbusiness.industryGeneral MedicineLipoproteins LDLEndocrinologyPhenotypeFatty Acids Unsaturatedlipids (amino acids peptides and proteins)Electrophoresis Polyacrylamide GelFemaleUltracentrifugebusinessQuantitative analysis (chemistry)Oxidation-ReductionLipoproteinThe American journal of medicine
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Overexpression of human hepatic lipase and ApoE in transgenic rabbits attenuates response to dietary cholesterol and alters lipoprotein subclass dist…

1999

Abstract —The effect of the expression of human hepatic lipase (HL) or human apoE on plasma lipoproteins in transgenic rabbits in response to dietary cholesterol was compared with the response of nontransgenic control rabbits. Supplementation of a chow diet with 0.3% cholesterol and 3.0% soybean oil for 10 weeks resulted in markedly increased levels of plasma cholesterol and VLDL and IDL in control rabbits as expected. Expression of either HL or apoE reduced plasma cholesterol response by 75% and 60%, respectively. The HL transgenic rabbits had substantial reductions in medium and small VLDL and IDL fractions but not in larger VLDL. LDL levels were also reduced, with a shift from larger, m…

Apolipoprotein EMalemedicine.medical_specialtyVery low-density lipoproteinTransgeneLipoproteinsCholesterol VLDLHypercholesterolemiaGene ExpressionPathogenesisAnimals Genetically ModifiedCholesterol Dietarychemistry.chemical_compoundApolipoproteins EInternal medicinemedicineAnimalsHumansTransgenesParticle SizeApolipoproteins BLagomorphabiologyCholesterolCholesterol HDLLipasebiology.organism_classificationEndocrinologyCholesterolchemistrylipoproteins apoE hepatic lipase rabbits transgeneLiverDiet Atherogeniclipids (amino acids peptides and proteins)Hepatic lipaseRabbitsCardiology and Cardiovascular MedicineLipoproteinArteriosclerosis, thrombosis, and vascular biology
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Plasma clearance of human low-density lipoprotein in human apolipoprotein B transgenic mice is related to particle diameter.

2004

To test for intrinsic differences in metabolic properties of low-density lipoprotein (LDL) as a function of particle size, we examined the kinetic behavior of 6 human LDL fractions ranging in size from 251 to 265 A injected intravenously into human apolipoprotein (apo) B transgenic mice. A multicompartmental model was formulated and fitted to the data by standard nonlinear regression using the Simulation, Analysis and Modeling (SAAM II) program. Smaller sized LDL particles (251 to 257 A) demonstrated a significantly slower fractional catabolic rate (FCR) (0.050 +/- 0.045 h(-1)) compared with particles of larger size (262 to 265 A) (0.134 +/- -0.015 h(-1), P.03), and there was a significant …

Genetically modified mouseAdultMalemedicine.medical_specialtySimvastatinApolipoprotein BMetabolic Clearance RateEndocrinology Diabetes and MetabolismPlasma clearance low-density lipoprotein apolipoprotein B trangenic miceMice Transgenicchemistry.chemical_compoundMiceEndocrinologyInternal medicineBlood plasmamedicineAnimalsHumansParticle SizeApolipoproteins BPravastatinbiologyCatabolismMiddle AgedLipoproteins LDLEndocrinologychemistryLow-density lipoproteinModels Animalbiology.proteinRegression Analysislipids (amino acids peptides and proteins)Particle sizeNonlinear regressionLipoproteinMetabolism: clinical and experimental
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