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[The incorporation of rifampicin into multilayer and monolayer vesicles (liposomes) of different phosholipid composition].

The incorporation of rifampicin into multilayer phospholipid vesicles depending on the concentration of antibiotic and phospholipid content was studied. The extent of incorporation of rifampicin into monolayer vesicles (liposomes), obtained by the homogenization of multilamellar vesicles, was determined by the method of gel filtration. It was found that rifampicin better penetrates and is retained in membranes consisting of a mixture of phosphatidylcholine and cardiolipin, the maximum incorporation of rifampicin into liposomes being 17%. It was shown by 31P NMR spectroscopy that, during the interaction of rifampicin with the phospholipid membrane, the bilayer packing of phospholipids is destroyed.