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• W2085368583 abstract "Amphotericin B (AmB) is one of the main antibiotics applied in treatment of deep-seated mycotic infections. Tensiometric technique has been applied to monitor binding of AmB, from the water subphase, to the lipid monomolecular layers, formed with dipalmitoylphosphatidylcholine at the air-water interface. Time dependencies of surface pressure in the monolayers demonstrate strong enhancement of AmB binding to monolayers brought about by sterols present in the membranes. The monolayers have been deposited to a solid support and examined by means of FTIR spectroscopy. FTIR measurements show that majority of the AmB molecules which bind to the membranes are localized in the polar headgroup region. The results of the linear dichroism-FTIR measurements are consistent with the microscopic picture according to which the molecules of the membrane-bound AmB are distributed among two orientational fractions: one horizontal and one vertical with respect to the plane of the membrane (59% versus 41% respectively, in the case of the membrane formed with the pure lipid without sterols). The presence of cholesterol in the membranes (50 mol% with respect to lipid) slightly affects such a distribution (53% horizontal versus 47% vertical) but the presence of ergosterol has a pronounced effect in the increase in population of the fraction of horizontally bound AmB (85% horizontal vs. 15% vertical). The results of the measurements indicate that mode of action of the AmB consists in disruption of the polar headgroup region of biomembranes, brought about by the AmB molecules bound horizontally with respect to the plane of the membrane." @default.
• W2085368583 created "2016-06-24" @default.
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• W2085368583 date "2005-01-01" @default.
• W2085368583 modified "2023-10-14" @default.
• W2085368583 title "Binding of antibiotic amphotericin B to lipid membranes: monomolecular layer technique and linear dichroism-FTIR studies" @default.
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• W2085368583 doi "https://doi.org/10.1080/09687860500287832" @default.
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