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Receptor binding peptides for target-selective delivery of nanoparticles encapsulated drugs

Authors Accardo A, Aloj L, Aurilio M, Morelli G, Tesauro D

Received 26 August 2013

Accepted for publication 23 October 2013

Published 27 March 2014 Volume 2014:9(1) Pages 1537—1557

DOI https://doi.org/10.2147/IJN.S53593

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

Antonella Accardo,1 Luigi Aloj,2 Michela Aurilio,2 Giancarlo Morelli,1 Diego Tesauro1

1Centro interuniversitario di Ricerca sui Peptidi Bioattivi (CIRPeB), Department of Pharmacy and Istituto di Biostrutture e Bioimmagini - Consiglio Nazionale delle Ricerche (IBB CNR), University of Naples “Federico II”, 2Department of Nuclear Medicine, Istituto Nazionale per lo Studio e la Cura dei Tumori, Fondazione “G. Pascale”, Napoli, Italy

Abstract: Active targeting by means of drug encapsulated nanoparticles decorated with targeting bioactive moieties represents the next frontier in drug delivery; it reduces drug side effects and increases the therapeutic index. Peptides, based on their chemical and biological properties, could have a prevalent role to direct drug encapsulated nanoparticles, such as liposomes, micelles, or hard nanoparticles, toward the tumor tissues. A considerable number of molecular targets for peptides are either exclusively expressed or overexpressed on both cancer vasculature and cancer cells. They can be classified into three wide categories: integrins; growth factor receptors (GFRs); and G-protein coupled receptors (GPCRs). Therapeutic agents based on nanovectors decorated with peptides targeting membrane receptors belonging to the GPCR family overexpressed by cancer cells are reviewed in this article. The most studied targeting membrane receptors are considered: somatostatin receptors; cholecystokinin receptors; receptors associated with the Bombesin like peptides family; luteinizing hormone-releasing hormone receptors; and neurotensin receptors. Nanovectors of different sizes and shapes (micelles, liposomes, or hard nanoparticles) loaded with doxorubicin or other cytotoxic drugs and externally functionalized with natural or synthetic peptides are able to target the overexpressed receptors and are described based on their formulation and in vitro and in vivo behaviors.

Keywords: receptors binding peptides, drug delivery, nanoparticles, supramolecular aggregates, active targeting

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