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Ultrashort Peptides and Gold Nanoparticles: Influence of Constrained Amino Acids on Colloidal Stability

Poor colloidal stability of gold nanoparticles (AuNPs) in physiological environments remains one of the major limitations that contribute to their difficult translation from bench to clinic. For this reason, an active research field is the development of molecules able to hamper AuNPs aggregation te...

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Autores principales: Locarno, Silvia, Bucci, Raffaella, Impresari, Elisa, Gelmi, Maria Luisa, Pellegrino, Sara, Clerici, Francesca
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8517408/
https://www.ncbi.nlm.nih.gov/pubmed/34660531
http://dx.doi.org/10.3389/fchem.2021.736519
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author Locarno, Silvia
Bucci, Raffaella
Impresari, Elisa
Gelmi, Maria Luisa
Pellegrino, Sara
Clerici, Francesca
author_facet Locarno, Silvia
Bucci, Raffaella
Impresari, Elisa
Gelmi, Maria Luisa
Pellegrino, Sara
Clerici, Francesca
author_sort Locarno, Silvia
collection PubMed
description Poor colloidal stability of gold nanoparticles (AuNPs) in physiological environments remains one of the major limitations that contribute to their difficult translation from bench to clinic. For this reason, an active research field is the development of molecules able to hamper AuNPs aggregation tendency in physiological environments. In this context, synthetic peptides are gaining an increased interest as an alternative to the use of biomacromolecules and polymers, due to their easiness of synthesis and their profitable pharmacokinetic profile. In this work, we reported on the use of ultrashort peptides containing conformationally constrained amino acids (AAs) for the stabilization of AuNPs. A small library of non-natural self-assembled oligopeptides were synthesized and used to functionalize spherical AuNPs of 20 nm diameter, via the ligand exchange method. The aim was to investigate the role of the constrained AA, the anchor point (at C- or N-terminus) and the peptide length on their potential use as gold binding motif. Ultrashort Aib containing peptides were identified as effective tools for AuNPs colloidal stabilization. Furthermore, peptide coated AuNPs were found to be storable as powders without losing the stabilization properties once re-dispersed in water. Finally, the possibility to exploit the developed systems for binding proteins via molecular recognition was also evaluated using biotin as model.
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spelling pubmed-85174082021-10-16 Ultrashort Peptides and Gold Nanoparticles: Influence of Constrained Amino Acids on Colloidal Stability Locarno, Silvia Bucci, Raffaella Impresari, Elisa Gelmi, Maria Luisa Pellegrino, Sara Clerici, Francesca Front Chem Chemistry Poor colloidal stability of gold nanoparticles (AuNPs) in physiological environments remains one of the major limitations that contribute to their difficult translation from bench to clinic. For this reason, an active research field is the development of molecules able to hamper AuNPs aggregation tendency in physiological environments. In this context, synthetic peptides are gaining an increased interest as an alternative to the use of biomacromolecules and polymers, due to their easiness of synthesis and their profitable pharmacokinetic profile. In this work, we reported on the use of ultrashort peptides containing conformationally constrained amino acids (AAs) for the stabilization of AuNPs. A small library of non-natural self-assembled oligopeptides were synthesized and used to functionalize spherical AuNPs of 20 nm diameter, via the ligand exchange method. The aim was to investigate the role of the constrained AA, the anchor point (at C- or N-terminus) and the peptide length on their potential use as gold binding motif. Ultrashort Aib containing peptides were identified as effective tools for AuNPs colloidal stabilization. Furthermore, peptide coated AuNPs were found to be storable as powders without losing the stabilization properties once re-dispersed in water. Finally, the possibility to exploit the developed systems for binding proteins via molecular recognition was also evaluated using biotin as model. Frontiers Media S.A. 2021-10-01 /pmc/articles/PMC8517408/ /pubmed/34660531 http://dx.doi.org/10.3389/fchem.2021.736519 Text en Copyright © 2021 Locarno, Bucci, Impresari, Gelmi, Pellegrino and Clerici. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Locarno, Silvia
Bucci, Raffaella
Impresari, Elisa
Gelmi, Maria Luisa
Pellegrino, Sara
Clerici, Francesca
Ultrashort Peptides and Gold Nanoparticles: Influence of Constrained Amino Acids on Colloidal Stability
title Ultrashort Peptides and Gold Nanoparticles: Influence of Constrained Amino Acids on Colloidal Stability
title_full Ultrashort Peptides and Gold Nanoparticles: Influence of Constrained Amino Acids on Colloidal Stability
title_fullStr Ultrashort Peptides and Gold Nanoparticles: Influence of Constrained Amino Acids on Colloidal Stability
title_full_unstemmed Ultrashort Peptides and Gold Nanoparticles: Influence of Constrained Amino Acids on Colloidal Stability
title_short Ultrashort Peptides and Gold Nanoparticles: Influence of Constrained Amino Acids on Colloidal Stability
title_sort ultrashort peptides and gold nanoparticles: influence of constrained amino acids on colloidal stability
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8517408/
https://www.ncbi.nlm.nih.gov/pubmed/34660531
http://dx.doi.org/10.3389/fchem.2021.736519
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