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Insulin-loaded liposomes packaged in alginate hydrogels promote the oral bioavailability of insulin.

Authors :
Wu, Haishan
Nan, Jian
Yang, Liu
Park, Hyun Jin
Li, Jinglei
Source :
Journal of Controlled Release. Jan2023, Vol. 353, p51-62. 12p.
Publication Year :
2023

Abstract

Compared to subcutaneous injections, oral administration of insulin would be a preferred route of drug administration for diabetic patients. For oral delivery, both liposomes and alginate hydrogels face many challenges, including early burst release of the encapsulated drug and poor intestinal drug absorption. Also, adhesion to the intestinal mucosa remains weak, which all result in a low bioavailability of the payload. This study reports on an alginate hydrogel loaded with liposomes for oral insulin administration. Liposomes (Lip) loaded with arginine-insulin complexes (AINS) were incorporated into a hydrogel prepared from cysteine modified alginate (Cys-Alg) to form liposome-in-alginate hydrogels (AINS-Lip-Gel). An ex vivo study proves that intestinal permeation of AINS and AINS-Lip is approximately 2.0 and 6.0-fold, respectively, higher than that of free insulin. The hydrogel retarded early release of insulin (∼30%) from the liposomes and enhanced the intestinal mucosal retention. In vivo experiments revealed that the AINS-Lip-Gel released insulin in a controlled manner and possessed strong hypoglycemic effects. We conclude that liposome-in-alginate hydrogels loaded with AINS represent an attractive strategy for the oral delivery of insulin. [Display omitted] • A novel liposome-in-hydrogel complex system was developed for oral delivery of insulin. • The modification of cysteine promotes mucosal retention of alginate. • Complex system only releases ∼10% insulin at pH 1.2. • Arginine modification and liposome encapsulation promotes intestinal absorption of insulin. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
01683659
Volume :
353
Database :
Academic Search Index
Journal :
Journal of Controlled Release
Publication Type :
Academic Journal
Accession number :
161552715
Full Text :
https://doi.org/10.1016/j.jconrel.2022.11.032