NDLI: One-Pot Synthesis of Silica-Coated Gold Nanostructures Loaded with Cyanine 5.5 for Cell Imaging by SERS Spectroscopy.

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One-Pot Synthesis of Silica-Coated Gold Nanostructures Loaded with Cyanine 5.5 for Cell Imaging by SERS Spectroscopy.

Content Provider	Europe PMC
Author	Smirnov, Aleksei N. Aslanov, Simar F. Danilov, Denis V. Kurapova, Olga Yu. Solovyeva, Elena V.
Editor	Amendola, Vincenzo
Copyright Year	2023
Abstract	Anisotropic gold nanoparticles have been recognized as promising agents for medical diagnostics and cancer therapy due to their wide functionality, photothermal effect, and ability for optical signal amplification in the near-infrared range. In this work, a simple and rapid method for the preparation of bone-shaped gold nanoparticles coated with a dye-impregnated silica shell with an aminated surface is proposed. The possibility of further functionalization the nanostructures with a delivery vector using folic acid as an example is demonstrated. The average size of the resulting tags does not exceed 70 nm, meeting the criteria of cell endocytosis. The prepared tags exhibit surface-enhanced Raman scattering (SERS) spectra at excitation with lasers of 632.8 and 785 nm. Cell imaging is performed on HeLa cells based on the most pronounced SERS bands as a tracking signal. The obtained images, along with scanning electron microscopy of cell samples, revealed the tendency of tags to agglomerate during endocytosis followed by the “hot spots” effect. To evaluate the toxic and proliferative effect of the nanotags, an MTT assay was performed with two HeLa and HEP G2 cell lines. The results revealed higher viability for HEP G2 cells.
Journal	Nanomaterials (Basel, Switzerland)
Volume Number	13
PubMed Central reference number	PMC10097174
Issue Number	7
PubMed reference number	37049360
e-ISSN	20794991
DOI	10.3390/nano13071267
Language	English
Publisher	MDPI
Publisher Date	2023-04-03
Access Restriction	Open
Rights License	Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). © 2023 by the authors.
Subject Keyword	gold nanoparticles silicon oxide one-pot synthesis tag SERS bioimaging cyanine
Content Type	Text
Resource Type	Article
Subject	Chemical Engineering Materials Science

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