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- W2086148434 abstract "The interaction of amphotericin B with isolated human erythrocyte ghosts was monitored by circular dichroism at 37°C and 15°C. Although different, these spectra were not concentration dependent over a concentration range covering the inducement of K+ leakage and hemolysis, which suggests the existence of only one bound amphotericin B species. At 15°C, the spectra indicate that amphotericin B is complexed with membrane cholesterol; the complex formation is saturable but not cooperative. At 37°C new spectra are observed, and their existence is conditioned by the presence of membrane proteins. The binding is cooperative but not saturable. The amphotericin B right side-out vesicles complexation is temperature as well as ionic strength dependent: at high ionic strength it is the same as with ghosts, with the same temperature dependence. At low ionic strength it is characteristic of an interaction with cholesterol, regardless of temperature. In the large unilamellar vesicles reconstituted from the total lipid extracts of erythrocyte membranes, amphotericin B is complexed with cholesterol, regardless of temperature and ionic strength. These results indicate that there are two different modes of amphotericin B complexation with erythrocyte membranes, reversible one in the other, depending on the molecular organization of the membrane and the presence of membrane proteins." @default.
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- W2086148434 date "1987-02-01" @default.
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- W2086148434 title "Temperature-dependent modes for the binding of the polyene antibiotic amphotericin B to human erythrocyte membranes. A circular dichroism study" @default.
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- W2086148434 doi "https://doi.org/10.1016/0005-2736(87)90419-6" @default.
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