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Chemical-Functional Diversity in Cell-Penetrating Peptides

Author

Listed:
  • Sofie Stalmans
  • Evelien Wynendaele
  • Nathalie Bracke
  • Bert Gevaert
  • Matthias D’Hondt
  • Kathelijne Peremans
  • Christian Burvenich
  • Bart De Spiegeleer

Abstract

Cell-penetrating peptides (CPPs) are a promising tool to overcome cell membrane barriers. They have already been successfully applied as carriers for several problematic cargoes, like e.g. plasmid DNA and (si)RNA, opening doors for new therapeutics. Although several hundreds of CPPs are already described in the literature, only a few commercial applications of CPPs are currently available. Cellular uptake studies of these peptides suffer from inconsistencies in used techniques and other experimental conditions, leading to uncertainties about their uptake mechanisms and structural properties. To clarify the structural characteristics influencing the cell-penetrating properties of peptides, the chemical-functional space of peptides, already investigated for cellular uptake, was explored. For 186 peptides, a new cell-penetrating (CP)-response was proposed, based upon the scattered quantitative results for cellular influx available in the literature. Principal component analysis (PCA) and a quantitative structure-property relationship study (QSPR), using chemo-molecular descriptors and our newly defined CP-response, learned that besides typical well-known properties of CPPs, i.e. positive charge and amphipathicity, the shape, structure complexity and the 3D-pattern of constituting atoms influence the cellular uptake capacity of peptides.

Suggested Citation

  • Sofie Stalmans & Evelien Wynendaele & Nathalie Bracke & Bert Gevaert & Matthias D’Hondt & Kathelijne Peremans & Christian Burvenich & Bart De Spiegeleer, 2013. "Chemical-Functional Diversity in Cell-Penetrating Peptides," PLOS ONE, Public Library of Science, vol. 8(8), pages 1-1, August.
    • Handle: RePEc:plo:pone00:0071752
    DOI: 10.1371/journal.pone.0071752
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    References listed on IDEAS

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    1. William S Sanders & C Ian Johnston & Susan M Bridges & Shane C Burgess & Kenneth O Willeford, 2011. "Prediction of Cell Penetrating Peptides by Support Vector Machines," PLOS Computational Biology, Public Library of Science, vol. 7(7), pages 1-12, July.
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