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Translocation of cell-penetrating peptides across the plasma membrane is controlled by cholesterol and microenvironment created by membranous proteins
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2014 (English)In: Journal of Controlled Release, ISSN 0168-3659, E-ISSN 1873-4995, Vol. 192, 103-113 p.Article in journal (Refereed) Published
Abstract [en]

Despite the extensive research in the field of CPPs' cell entry the exact mechanisms underlying their cellular uptake and the role of involved cell surface molecules in the internalization process have remained controversial. The present study focused on the interactions between CPPs and plasma membrane compounds using giant plasma membrane vesicles (GPMVs). GPMVs have shown to be a suitable model to study the translocation of CPPs across the plasma membrane in conditions lacking endocytosis. Our results show that higher cholesterol content and tighter packing of membrane predominantly reduce the accumulation of transportan, TP10 and model amphipathic peptide (MAP) in vesicles, indicating that the internalization of CPPs takes place preferentially via the more dynamic membrane regions. The partial digestion of membrane proteins from GPMVs' surface, on the other hand, drastically reduced the accumulation of nona-arginine and Tat peptide into vesicles, suggesting that proteins play a crucial role in the uptake of arginine-rich CPPs.

Place, publisher, year, edition, pages
2014. Vol. 192, 103-113 p.
Keyword [en]
Plasma membrane vesicles, Tat peptide, Transportan, Nona-arginine, Direct translocation, Cell-penetrating peptide
National Category
Chemical Sciences
URN: urn:nbn:se:su:diva-108703DOI: 10.1016/j.jconrel.2014.07.002ISI: 000342460400011OAI: diva2:761943


Available from: 2014-11-10 Created: 2014-11-03 Last updated: 2015-04-21Bibliographically approved

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Langel, Ülo
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Department of Neurochemistry
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