Abstract
To evaluate the usefulness of liposomes as a carrier for the targeted delivery of antigens to gut-associated lymphoid tissue, liposomal stability and uptake by rat Peyer's patches were investigated. Liposomes composed of distearoylphosphatidylcholine, phosphatidylserine, and cholesterol (DSPC-liposome), or dipalmitoylphosphatidylcholine, phosphatidylserine, and cholesterol were stable in acidic solution (pH 2.0), diluted bile, and pancreatin solution. Following the oral administration of liposomes to rats, rhodamine B-PE incorporated in the lipid phase of DSPC-liposomes was preferentially taken up by Peyer's patches in the lower ileum. The uptake of rhodamine B-PE from DSPC-liposomes larger than 374 nm in mean diameter was high. Orally administered DSPC-liposomes of a large diameter thus appear to serve effectively as a vehicle for delivering antigens to Peyer's patches.
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Aramaki, Y., Tomizawa, H., Hara, T. et al. Stability of Liposomes in Vitro and Their Uptake by Rat Peyer's Patches Following Oral Administration. Pharm Res 10, 1228–1231 (1993). https://doi.org/10.1023/A:1018936806278
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DOI: https://doi.org/10.1023/A:1018936806278