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Polyglutamic acid–PEG nanocapsules as long circulating carriers for the delivery of docetaxel

Abstract : Recently we reported for the first time a new type of nanocapsules consisting of an oily core and a polymer shell made of a polyglutamic acid–polyethylene glycol (PEG–PGA) grafted copolymer with a 24% w/w PEG content. The goal of the work presented here has been to develop a new version of these nanocapsules, in which the shell is made of a di-block PEG–PGA copolymer with a 57% w/w PEG content and to evaluate their potential for improving the biodistribution and pharmacokinetics of the anticancer drug docetaxel (DCX). A comparative analysis of the biodistribution of fluorescently labeled PGA–PEG nanocapsules versus PGA nanocapsules or a control nanoemulsion (containing the same oil than the nanocapsules) showed that the nanocapsules, and in particular PEGylated nanocapsules, have significantly higher half-life, MRT (Mean Residence Time) and AUC (Area under the Curve) than the nanoemulsion. On a separate set of experiments, PGA–PEG nanocapsules were loaded with DCX and their antitumor efficacy was evaluated in a xenograft U87MG glioma mouse model. The results showed that the survival rate for mice treated with DCX-loaded nanocapsules was significantly increased over the control Taxotere®, while the antitumoral effect of both formulations was comparable (60% tumor growth inhibition with respect to the untreated mice). These results highlight the potential use of these novel nanocapsules as a new drug delivery platform in cancer therapy.
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Soumis le : mercredi 24 mars 2021 - 12:22:44
Dernière modification le : mercredi 20 octobre 2021 - 03:19:23


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Giovanna Lollo, Gustavo Rivera-Rodriguez, Jérôme Bejaud, Tristan Montier, Catherine Passirani-Malleret, et al.. Polyglutamic acid–PEG nanocapsules as long circulating carriers for the delivery of docetaxel. European Journal of Pharmaceutics and Biopharmaceutics, Elsevier, 2014, 87 (1), Non spécifié. ⟨10.1016/j.ejpb.2014.02.004⟩. ⟨hal-03179499⟩



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