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Targeting Ultrasmall Gold Nanoparticles with cRGD Peptide Increases the Uptake and Efficacy of Cytotoxic Payload

Cyclic arginyl-glycyl-aspartic acid peptide (cRGD) peptides show a high affinity towards αVβ3 integrin, a receptor overexpressed in many cancers. We aimed to combine the versatility of ultrasmall gold nanoparticles (usGNP) with the target selectivity of cRGD peptide for the directed delivery of a cy...

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Detalles Bibliográficos
Autores principales: Perrins, Richard D., McCarthy, Lee-Anne, Robinson, Angela, Spry, Kelly L., Cognet, Valentin, Ferreira, Avelino, Porter, John, Garcίa, Cristina Espinosa, Rodriguez, Miguel Ángel, Lopez, Diana, Perera, Ibon, Conlon, Kelly, Barrientos, Africa, Coulter, Tom, Pace, Alessandro, Hale, Sarah J. M., Ferrari, Enrico, Bachrati, Csanad Z.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9696180/
https://www.ncbi.nlm.nih.gov/pubmed/36432299
http://dx.doi.org/10.3390/nano12224013
Descripción
Sumario:Cyclic arginyl-glycyl-aspartic acid peptide (cRGD) peptides show a high affinity towards αVβ3 integrin, a receptor overexpressed in many cancers. We aimed to combine the versatility of ultrasmall gold nanoparticles (usGNP) with the target selectivity of cRGD peptide for the directed delivery of a cytotoxic payload in a novel design. usGNPs were synthesized with a modified Brust-Schiffrin method and functionalized via amide coupling and ligand exchange and their uptake, intracellular trafficking, and toxicity were characterized. Our cRGD functionalized usGNPs demonstrated increased cellular uptake by αVβ3 integrin expressing cells, are internalized via clathrin-dependent endocytosis, accumulated in the lysosomes, and when loaded with mertansine led to increased cytotoxicity. Targeting via cRGD functionalization provides a mechanism to improve the efficacy, tolerability, and retention of therapeutic GNPs.