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Pharmaceuticals 2010, 3(3), 636-666; doi:10.3390/ph3030636

Dendritic Guanidines as Efficient Analogues of Cell Penetrating Peptides

1 and 1,2,*
Received: 18 December 2010 / Revised: 10 February 2010 / Accepted: 9 March 2010 / Published: 12 March 2010
(This article belongs to the Special Issue Cell-penetrating Peptides)
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The widespread application of cell penetrating agents to clinical therapeutics and imaging agents relies on the ability to prepare them on a large scale and to readily conjugate them to their cargos. Dendritic analogues of cell penetrating peptides, with multiple guanidine groups on their peripheries offer advantages as their high symmetry allows them to be efficiently synthesized, while orthogonal functionalities at their focal points allow them to be conjugated to cargo using simple synthetic methods. Their chemical structures and properties are also highly tunable as their flexibility and the number of guanidine groups can be tuned by altering the dendritic backbone or the linkages to the guanidine groups. This review describes the development of cell-penetrating dendrimers based on several different backbones, their structure-property relationships, and comparisons of their efficacies with those of known cell penetrating peptides. The toxicities of these dendritic guanidines are also reported as well as their application towards the intracellular delivery of biologically significant cargos including proteins and nanoparticles.
Keywords: cell penetrating peptide; dendrimer; guanidine; drug delivery; cell-uptake; toxicity cell penetrating peptide; dendrimer; guanidine; drug delivery; cell-uptake; toxicity
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Bonduelle, C.V.; Gillies, E.R. Dendritic Guanidines as Efficient Analogues of Cell Penetrating Peptides. Pharmaceuticals 2010, 3, 636-666.

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