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Cell-penetrating peptide enhanced insulin buccal absorption

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

  • Xu, You
  • Xiaojuan Zhang
  • Nana Wang
  • Xing Pei
  • Yiyue Guo
  • Jianxin Wang
  • Stefan Barth
  • Fei Yu
  • Seung Jin Lee
  • Huining He
  • Victor C Yang

Non-injectable delivery of peptides and proteins is not feasible due to the limitations of large molecular mass, high hydrophilic properties, and gastrointestinal degradation. Therefore, proposing a new method to solve this problem is a burning issue. The objective of this study was to propose a novel protein delivery strategy to overcome the poor efficacy and irritation of buccal insulin delivery. In this study, we applied a conjugate of cell-penetrating peptides (LMWP) and insulin (INS-PEG-LMWP) for buccal delivery. INS-PEG-LMWP was prepared using insulin solution and mixture as references. The transport behaviour, in vivo bioactivity, hypoglycaemic effect, and safety of INS-PEG-LMWP were systematically characterised. An in vitro study demonstrated that the uptake and transportation of INS-PEG-LMWP across buccal mucosal multilayers significantly increased. By comparing the effects of different endocytic inhibitors on INS-PEG-LMWP uptake, the conjugate might be delivered via an energy independent, electrostatically adsorbed pathway. INS-PEG-LMWP's relative pharmacological bioavailability was high and its relative bioavailability was up to 26.86%, demonstrating no visible mucosal irritation. Cell-penetrating peptides are likely to become a reliable and safe tool for overcoming insulin's low permeability through the epithelial multilayers, the major barrier to buccal delivery.

OriginalsprogEngelsk
TidsskriftInternational Journal of Pharmaceutics
Vol/bind584
Sider (fra-til)119469
ISSN0378-5173
DOI
StatusUdgivet - 30 jun. 2020

ID: 243383118