Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 48, 2016
Previous Article Next Article

Increased hydrophobic block length of PTDMs promotes protein internalization

Author affiliations

Abstract

The plasma membrane is a major obstacle in the development and use of biomacromolecules for intracellular therapeutic applications. Protein transduction domains (PTDs) have been used to overcome this barrier, but often require covalent conjugation to their cargo and can be time consuming to synthesize. Synthetic monomers can be designed to mimic the amino acid moieties in PTDs, and their resulting polymers provide a well-controlled platform to vary molecular composition for structure–activity relationship studies. In this paper, a series of polyoxanorbornene-based synthetic mimics, inspired by PTDs, with varying cationic and hydrophobic densities, and the nature of the hydrophobic chain and degree of polymerizations were investigated in vitro to determine their ability to non-covalently transport enhanced green fluorescent protein into HeLa cells, Jurkat T cells, and hTERT mesenchymal stem cells. Polymers with high charge density lead to efficient protein delivery. Similarly, the polymers with the highest hydrophobic content and density proved to be the most efficient at internalization. The observed improvements with increased hydrophobic length and content were consistent across all three cell types, suggesting that these architectural relationships are not cell type specific. However, Jurkat T cells showed more variation in uptake between polymers than with the other two cell types. These results provide important design parameters for effective delivery of biomacromolecules for intracellular delivery applications.

Graphical abstract: Increased hydrophobic block length of PTDMs promotes protein internalization

Back to tab navigation

Associated articles

Supplementary files

Article information


Submitted
13 Sep 2016
Accepted
08 Nov 2016
First published
14 Nov 2016

Polym. Chem., 2016,7, 7514-7521
Article type
Paper

Increased hydrophobic block length of PTDMs promotes protein internalization

C. M. Backlund, F. Sgolastra, R. Otter, L. M. Minter, T. Takeuchi, S. Futaki and G. N. Tew, Polym. Chem., 2016, 7, 7514
DOI: 10.1039/C6PY01615D

Social activity

Search articles by author

Spotlight

Advertisements