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Cellular localization, accumulation and trafficking of double-walled carbon nanotubes in human prostate cancer cells

Neves, Vera and Gerondopoulos, Andreas and Heister, Elena and Tîlmaciu, Carmen and Flahaut, Emmanuel and Soula, Brigitte and Silva, S. Ravi P. and McFadden, Johnjoe and Coley, Helen M. Cellular localization, accumulation and trafficking of double-walled carbon nanotubes in human prostate cancer cells. (2012) Nano Research, 5 (4). 223-234. ISSN 1998-0124

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Official URL: http://dx.doi.org/10.1007/s12274-012-0202-9

Abstract

Carbon nanotubes (CNTs) are at present being considered as potential nanovectors with the ability to deliver therapeutic cargoes into living cells. Previous studies established the ability of CNTs to enter cells and their therapeutic utility, but an appreciation of global intracellular trafficking associated with their cellular distribution has yet to be described. Despite the many aspects of the uptake mechanism of CNTs being studied, only a few studies have investigated internalization and fate of CNTs inside cells in detail. In the present study, intracellular localization and trafficking of RNA-wrapped, oxidized double-walled CNTs (oxDWNT–RNA) is presented. Fixed cells, previously exposed to oxDWNT–RNA, were subjected to immunocytochemical analysis using antibodies specific to proteins implicated in endocytosis; moreover cell compartment markers and pharmacological inhibitory conditions were also employed in this study. Our results revealed that an endocytic pathway is involved in the internalization of oxDWNT–RNA. The nanotubes were found in clathrin-coated vesicles, after which they appear to be sorted in early endosomes, followed by vesicular maturation, become located in lysosomes. Furthermore, we observed co-localization of oxDWNT–RNA with the small GTP-binding protein (Rab 11), involved in their recycling back to the plasma membrane via endosomes from the trans-golgi network.

Item Type:Article
HAL Id:hal-00836017
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > University of Surrey (UNITED KINGDOM)
Laboratory name:
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Deposited By: cirimat webmestre
Deposited On:14 Jun 2013 13:50

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