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Lai S, Centi S, Borri C, Ratto F, Cavigli L, Micheletti F, Kemper B, Ketelhut S, Kozyreva T, Gonnelli L, Rossi F, Colagrande S, Pini R. A multifunctional organosilica cross-linker for the bio-conjugation of gold nanorods. Colloids Surf B Biointerfaces 2017; 157:174-181. [PMID: 28586730 DOI: 10.1016/j.colsurfb.2017.05.068] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 05/03/2017] [Accepted: 05/26/2017] [Indexed: 12/21/2022]
Abstract
We report on the use of organosilica shells to couple gold nanorods to functional peptides and modulate their physiochemical and biological profiles. In particular, we focus on the case of cell penetrating peptides, which are used to load tumor-tropic macrophages and implement an innovative drug delivery system for photothermal and photoacoustic applications. The presence of organosilica exerts subtle effects on multiple parameters of the particles, including their size, shape, electrokinetic potential, photostability, kinetics of endocytic uptake and cytotoxicity, which are investigated by the interplay of colorimetric methods and digital holographic microscopy. As a rule of thumb, as the thickness of organosilica increases from none to ∼30nm, we find an improvement of the photophysical performances at the expense of a deterioration of the biological parameters. Therefore, detailed engineering of the particles for a certain application will require a careful trade-off between photophysical and biological specifications.
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Affiliation(s)
- Sarah Lai
- Institute of Applied Physics, National Research Council of Italy, Sesto Fiorentino, Italy
| | - Sonia Centi
- Institute of Applied Physics, National Research Council of Italy, Sesto Fiorentino, Italy
| | - Claudia Borri
- Institute of Applied Physics, National Research Council of Italy, Sesto Fiorentino, Italy; Department of Experimental and Clinical Biomedical Science, University of Florence, Florence, Italy
| | - Fulvio Ratto
- Institute of Applied Physics, National Research Council of Italy, Sesto Fiorentino, Italy.
| | - Lucia Cavigli
- Institute of Applied Physics, National Research Council of Italy, Sesto Fiorentino, Italy
| | - Filippo Micheletti
- Institute of Applied Physics, National Research Council of Italy, Sesto Fiorentino, Italy
| | - Bjӧrn Kemper
- Biomedical Technology Center, University of Muenster, Muenster, Germany
| | - Steffi Ketelhut
- Biomedical Technology Center, University of Muenster, Muenster, Germany
| | | | | | - Francesca Rossi
- Institute of Applied Physics, National Research Council of Italy, Sesto Fiorentino, Italy
| | - Stefano Colagrande
- Department of Experimental and Clinical Biomedical Science, University of Florence, Florence, Italy
| | - Roberto Pini
- Institute of Applied Physics, National Research Council of Italy, Sesto Fiorentino, Italy
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