Author:
De Lorenzi Federica,Rizzo Larissa Yokota,Daware Rasika,Motta Alessandro,Baues Maike,Bartneck Matthias,Vogt Michael,van Zandvoort Marc,Kaps Leonard,Hu Qizhi,Thewissen Marielle,Casettari Luca,Rijcken Cristianne J. F.,Kiessling Fabian,Sofias Alexandros Marios,Lammers Twan
Abstract
AbstractPolymeric micelles are increasingly explored for tumor-targeted drug delivery. CriPec® technology enables the generation of core‐crosslinked polymeric micelles (CCPMs) based on thermosensitive (mPEG-b-pHPMAmLacn) block copolymers, with high drug loading capacity, tailorable size, and controlled drug release kinetics. In this study, we decorated clinical-stage CCPM with the αvβ3 integrin-targeted cyclic arginine-glycine-aspartic acid (cRGD) peptide, which is one of the most well-known active targeting ligands evaluated preclinically and clinically. Using a panel of cell lines with different expression levels of the αvβ3 integrin receptor and exploring both static and dynamic incubation conditions, we studied the benefit of decorating CCPM with different densities of cRGD. We show that incubation time and temperature, as well as the expression levels of αvβ3 integrin by target cells, positively influence cRGD-CCPM uptake, as demonstated by immunofluorescence staining and fluorescence microscopy. We demonstrate that even very low decoration densities (i.e., 1 mol % cRGD) result in increased engagement and uptake by target cells as compared to peptide-free control CCPM, and that high cRGD decoration densities do not result in a proportional increase in internalization. In this context, it should be kept in mind that a more extensive presence of targeting ligands on the surface of nanomedicines may affect their pharmacokinetic and biodistribution profile. Thus, we suggest a relatively low cRGD decoration density as most suitable for in vivo application.
Graphical Abstract
Funder
European Fund for Regional Development
European Research Council
German Research Foundation
German Federal Ministry of Research and Education
Deutsche Krebshilfe
RWTH Aachen University
Publisher
Springer Science and Business Media LLC
Cited by
9 articles.
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