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Macrophage interaction of HDL subclasses separated by free flow isotachophoresis. by G Nowicka; T Brüning; A Böttcher; G Kahl; G Schmitz is a Medicine article available to read on EtoBox.

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Preparative isotachophoresis (ITP) was used for the fractionation of fasting and postprandial high density lipoproteins (HDL) according to their net charge in the absence of molecular sieve effects. Three major HDL subpopulations with fast, intermediate, and slow mobility have been recognized. Particle size analysis by gradient gel electrophoresis has shown that in the fast-migrating subpopulation particles dominate with a size of HDL3a and HDL2b. The subpopulation with intermediate mobility contains particles with a size between HDL2a and HDL3b, while in the slow migrating subpopulation particles dominate with a size of HDL2b, HDL3a, and HDL3c. The fast-migrating subpopulation is rich in apoA-I and phosphatidylcholine. The particles of this fraction bind at 4 degrees C to HDL receptors on macrophages with high affinity (KD = 7.71 micrograms/ml; Bmax = 245.6 ng). The subpopulations with intermediate mobility is rich in apoA-II, apoE, C apolipoproteins, cholesteryl esters, and sphingomyelin. Its affinity to HDL receptors (KD = 17.7 micrograms/ml; Bmax = 198.4 ng) is lower than that of the HDL particles in the fast-migrating subfraction. The slow-migrating subpopulation consists of p

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Author

G Nowicka; T Brüning; A Böttcher; G Kahl; G Schmitz

Publisher

Elsevier BV

Published

1990

Language

EN

Field

Medicine (Health Sciences)