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Folate Targeted PEGylated Liposomes For The Oral Delivery Of Insulin: In Vitro And In Vivo Studies.

Jafar Rahnama Yazdi, M. Tafaghodi, K. Sadri, Mohammad Mashreghi, A. R. Nikpoor, S. Nikoofal-Sahlabadi, J. Chamani, R. Vakili, Seyedeh Alia Moosavian, M. R. Jaafari
Published 2020 · Chemistry, Medicine

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In this study using phospholipids with high transition temperature and taking advantage of PEGylation, we designed liposomal formulation targeted with folic acid (FA) to improve the stability of liposomes with high penetration efficiency at the same time. The results of characterization demonstrated that liposomal formulations are in range of 150-210 nm size with negative surface charge. The results of cell uptake indicated that FA conjugation resulted in the more uptake of insulin. However, the results of transepithelial electrical resistance (TEER) showed no statistical differences among the formulations. The results of biodistribution also demonstrated that PEGylated liposome targeted with FA had more residence time in stomach and intestine along with higher amounts in blood and liver. The anti-diabetic effects of formulation in vivo indicated the efficacy of PEGylated liposome targeted with FA had promising results in decreasing blood glucose and increasing insulin levels. The results of this study indicated that using phospholipids with high Tm along with PEGylation and using targeting ligand could improve efficiency of oral delivery of liposomes which merit further investigation.
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