alexa Vesicles from Pluronic poly(lactic acid) block copolymers as new carriers for oral insulin delivery.
Materials Science

Materials Science

Journal of Nanomedicine & Nanotechnology

Author(s): Xiong XY, Li YP, Li ZL, Zhou CL, Tam KC,

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Abstract The morphologies of poly(lactic acid)-b-Pluronic-b-poly(lactic acid) (PLA-F127-PLA) aggregates in aqueous solutions were reported previously to be vesicular nano-particles by our group. In the present study, we seek to investigate the feasibility of using PLA-F127-PLA vesicles as oral delivery carrier for insulin. Both in vitro and in vivo release behavior of insulin loaded in PLA-F127-PLA vesicles were studied. A biphasic release behavior was observed for the in vitro release of insulin from PLAF127-29 vesicles. More importantly, it was found in the diabetic mice tests that the blood glucose concentration of oral insulin-loaded PLAF127-29 vesicles decreased from 18.5 to 5.3 mmol/L within 4.5 h and the minimum blood glucose concentration (about 4.5 mmol/L) was achieved after about 5 h. Furthermore, the blood glucose concentration was maintained at this level for at least an additional 18.5 h. These results proved that PLA-F127-PLA vesicles could be promising polymeric carriers for oral insulin delivery application due to their prolonged hypoglycemic effect. This article was published in J Control Release and referenced in Journal of Nanomedicine & Nanotechnology

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