Steroid-derived phospholipid scramblases induce exposure of phosphatidylserine on the surface of red blood cells
| Autor: | Kristy M. DiVittorio, Timothy N. Lambert, Bradley D. Smith |
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| Rok vydání: | 2005 |
| Předmět: |
Phospholipid scramblase
Magnetic Resonance Spectroscopy Clinical Biochemistry Phospholipid Pharmaceutical Science Phosphatidylserines Spectrometry Mass Fast Atom Bombardment Biochemistry chemistry.chemical_compound Annexin Drug Discovery medicine Phospholipid Transfer Proteins Molecular Biology Chemistry Vesicle Organic Chemistry Erythrocyte Membrane Membrane Proteins Biological activity Phosphatidylserine Red blood cell medicine.anatomical_structure Membrane Spectrometry Fluorescence Molecular Medicine lipids (amino acids peptides and proteins) Cholates |
| Zdroj: | Bioorganicmedicinal chemistry. 13(14) |
| ISSN: | 0968-0896 |
| Popis: | A series of methyl 7alpha,12alpha-bis(phenylurea) cholate derivatives with different cationic substituents at the 3alpha-position were prepared and evaluated for an ability to increase the level of endogenous phosphatidylserine (PS) on the surface of red blood cells (erythrocytes). Some of the compounds induced large fractions of erythrocytes to expose sufficient PS to become stained by the protein annexin V-FITC. In addition, the compounds were found to bind PS in homogeneous solution, and to promote the translocation of fluorescent NBD-labeled phospholipids across vesicle membranes, which supports the hypothesis that cholate-induced exposure of endogenous PS on the erythrocyte surface is due to the ability of the cationic cholates to promote anionic phospholipid flip-flop. |
| Databáze: | OpenAIRE |
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