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Cell entry and antimicrobial properties of eukaryotic cell-penetrating peptides
KTH, Superseded Departments, Biotechnology.
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2003 (English)In: The FASEB Journal, ISSN 0892-6638, E-ISSN 1530-6860, Vol. 17, no 15, 394-+ p.Article in journal (Refereed) Published
Abstract [en]

Antimicrobial drug action is limited by both microbial and host cell membranes. Microbes stringently exclude the entry of most drugs, and mammalian membranes limit drug distribution and access to intracellular pathogens. Recently, cell-penetrating peptides (CPPs) have been developed as carriers to improve mammalian cell uptake. Given that CPP's are cationic and often amphipathic, similar to membrane active antimicrobial peptides, it may be possible to use CPP activity to improve drug delivery to microbes. Here, two CPPs, TP10 and pVEC, were found to enter a range of bacteria and fungi. The uptake route involves rapid surface accumulation within minutes followed by cell entry. TP10 inhibited Candida albicans and Staphylococcus aureus growth, and pVEC inhibited Mycobacterium smegmatis growth at low micromolar doses, below the levels that harmed human HeLa cells. Therefore, although TP10 and pVEC entered all cell types tested, they preferentially damage microbes, and this effect was sufficient to clear HeLa cell cultures from noninvasive S. aureus infection. Also, conversion of the cytotoxicity indicator dye SYTOX Green showed that TP10 causes rapid and lethal permeabilization of S. aureus and pVEC permeabilizes M. smegmatis, but not HeLa cells. Therefore, TP10 and pVEC can enter both mammalian and microbial cells and preferentially permeabilize and kill microbes.

Place, publisher, year, edition, pages
2003. Vol. 17, no 15, 394-+ p.
Keyword [en]
bacteria, fungi, cell-permeable peptide, drug delivery, membranes, permeability, antibiotics, mechanism, buforin, analogs
URN: urn:nbn:se:kth:diva-23090DOI: 10.1096/fj.03-0449fjeISI: 000188067500030OAI: diva2:341788
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Kuttuva, Gunaratna R.
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