Is there any correlation between platelet aggregation, plasma lipoproteins, apoproteins and membrane fluidity of human blood platelets? 1989

E Malle, and A Gries, and G M Kostner, and K Pfeiffer, and J Nimpf, and A Hermetter
Institute of Medical Biochemistry, University of Graz, Austria.

Fluorescence anisotropy (which is inversely related to membrane fluidity) of gel filtered platelets of 18 normolipemic subjects (20-26 years) was measured after incubation with three different fluorescent probes (DPH, TMA-DPH, and 6-As). These values were correlated to both platelet aggregation parameters after stimulation with ADP (4 microM), epinephrine (10 microM) or collagen (2 micrograms/ml PRP) and to plasma lipids, lipoproteins and apoproteins. Fluorescence anisotropy values after DPH-labeling of platelets were only negatively correlated to TG (p less than 0.05). No correlation was found between fluorescence anisotropy values of DPH, TMA-DPH and 6-As to LDL-C, Lp(a), HDL-C and HDL3-C (p less than 0.01). However, fluorescence anisotropy values of DPH and TMA-DPH were negatively correlated to apoproteins A2 and B (p less than 0.05). No correlations were found between fluorescence anisotropy after DPH labeling and different aggregation parameters. TMA-DPH and 6-As fluorescence anisotropy values are correlated to epinephrine induced stimulation (p less than 0.01).

UI MeSH Term Description Entries
D008074 Lipoproteins Lipid-protein complexes involved in the transportation and metabolism of lipids in the body. They are spherical particles consisting of a hydrophobic core of TRIGLYCERIDES and CHOLESTEROL ESTERS surrounded by a layer of hydrophilic free CHOLESTEROL; PHOSPHOLIPIDS; and APOLIPOPROTEINS. Lipoproteins are classified by their varying buoyant density and sizes. Circulating Lipoproteins,Lipoprotein,Lipoproteins, Circulating
D008560 Membrane Fluidity The motion of phospholipid molecules within the lipid bilayer, dependent on the classes of phospholipids present, their fatty acid composition and degree of unsaturation of the acyl chains, the cholesterol concentration, and temperature. Bilayer Fluidity,Bilayer Fluidities,Fluidities, Bilayer,Fluidities, Membrane,Fluidity, Bilayer,Fluidity, Membrane,Membrane Fluidities
D010974 Platelet Aggregation The attachment of PLATELETS to one another. This clumping together can be induced by a number of agents (e.g., THROMBIN; COLLAGEN) and is part of the mechanism leading to the formation of a THROMBUS. Aggregation, Platelet
D005454 Fluorescence Polarization Measurement of the polarization of fluorescent light from solutions or microscopic specimens. It is used to provide information concerning molecular size, shape, and conformation, molecular anisotropy, electronic energy transfer, molecular interaction, including dye and coenzyme binding, and the antigen-antibody reaction. Anisotropy, Fluorescence,Fluorescence Anisotropy,Polarization, Fluorescence,Anisotropies, Fluorescence,Fluorescence Anisotropies,Fluorescence Polarizations,Polarizations, Fluorescence
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D001059 Apoproteins The protein components of a number of complexes, such as enzymes (APOENZYMES), ferritin (APOFERRITINS), or lipoproteins (APOLIPOPROTEINS). Apoprotein

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