Cell-Penetrating Peptides as Carriers for Transepithelial Drug Delivery

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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.
Original languageEnglish
Title of host publicationCell Penetrating Peptides : Methods and Protocols
EditorsÜlo Langel
Publication date2022
ISBN (Print)978-1-0716-1751-9
ISBN (Electronic)978-1-0716-1752-6
Publication statusPublished - 2022
SeriesMethods in Molecular Biology

Bibliographical note

The Novo Nordisk Foundation is acknowledged for supporting the Center for Biopharmaceuticals and Biobarriers in Drug Delivery (BioDelivery; Grand Challenge Program, grant number NNF16OC0021948) (D.A.P., R.G.D.).

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