Publication date: September 2017
Source:International Journal of Biological Macromolecules, Volume 102
Author(s): Yi Wu, Lei Yi, Entao Li, Youying Li, Yan Lu, Peijuan Wang, Honglei Zhou, Jiaguo Liu, Yuanliang Hu, Deyun Wang
Glycyrrhiza polysaccharide liposome (GPSL) was prepared by reverse-phase evaporation method and optimized with response surface methodology. As a result, the optimum preparation conditions were as follows: the ratio of soybean phosphatide to Glycyrrhiza polysaccharide (GPS) of 24:1, temperature of drug incubation of 46°C, the ultrasound time of 16min. Confirmation experiments and transmission electron micrograph (SEM) exhibited the entrapment efficiency of liposome as 78.33±0.25%, with spherical shape and uniform sizes. Furthermore, proliferation assay, allogeneic mixed lymphocyte reaction and supernatant cytokines of chBM-DCs were performed by MTT and ELISA methods to investigate the immune-modulating effects of GPSL and GPS. The results showed that GPSL could significantly promote the proliferation of immature chBM-DCs, enhance the ability of mature chBM-DCs to induce T-cell proliferation and modulate the mature chBM-DCs to secret cytokines such as IL-2, IFN-γ and IL-10. These evidences indicated that the immune-modulating activity of GPS was significantly improved after encapsulated with liposome.
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