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Cell-Penetrating Peptides as Carriers for Transepithelial Drug Delivery

2021; Springer Science+Business Media; Linguagem: Inglês

10.1007/978-1-0716-1752-6_24

1940-6029

Danai-Anastasia Panou, Ragna Guldsmed Diedrichsen, Mie Kristensen, Hanne Mørck Nielsen,

Advanced Drug Delivery Systems

This chapter describes the use of cell-penetrating peptides (CPPs) as carriers for transepithelial delivery of therapeutic peptides. Assessment of transepithelial peptide permeation and the mechanisms of action that permeability enhancing drug carriers exert on the epithelium requires subtle sample preparation and analysis by orthogonal methods. Here, the preparation and use of CPP-insulin physical mixture samples including the quantification of insulin by enzyme-linked immunosorbent assay (ELISA) is described. In addition, effects of CPPs on the epithelium and its barrier properties immediately upon exposure and after a recovery period are evaluated by epithelial cell viability, transepithelial electrical resistance, immunostaining of the tight junction associated zonula occludens (ZO-1) protein, and actin cytoskeleton staining.