Abstract
Liposomes composed of dipalmitoylphosphatidylcholine (DPPC), cholesterol and a neoglycolipid, mannopentaose-conjugated dipalmitoylphosphatidylethanolamine (Man5-DPPE), have been shown to have a strong adjuvant effect in inducing the antigen-specific cellular immunity. In this study, a rapid and simple analytical method using a HPLC system with an evaporative light scattering detector was developed for simultaneous quantification of the liposome components Man5-DPPE, cholesterol and DPPC. The chromatographic separation of these components was performed using a trimethylsilane column with an isocratic mobile phase of chloroform–methanol–water (1:33:6, v/v) after disrupting the liposomes with chloroform–methanol–water (10:10:3, v/v). This HPLC method provided sufficient reproducibility and linearity of calibration curves for the quantification of the liposome constituents. In addition, this method can be used for the quantification of various neoglycolipids with different carbohydrate structures.
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