Aptamer-conjugated, fluorescent gold nanorods as potential cancer theradiagnostic agents
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GNRs are emerging as a new class of probes for theradiagnostic applications thanks to their unique optical properties. However, the achievement of proper nanoconstructs requires the synthesis of highly pure GNRs with well-defined aspect ratio (AR), in addition to extensive surface chemistry modification to provide them with active targeting and, possibly, multifunctionality. In this work, we refined the method of the seed mediated growth and developed a robust procedure for the fabrication of GNRs with specific AR. We also revealed and characterized unexplored aging phenomena that follow the synthesis and consistently alter GNRs' final AR. Such advances appreciably improved the feasibility of GNRs fabrication and offered useful insights on the growth mechanism. We next produced fluorescent, biocompatible, aptamer-conjugated GNRs by performing ligand exchange followed by bioconjugation to anti-cancer oligonucleotide AS1411. In vitro studies showed that our nanoconstructs selectively target cancer cells while showing negligible cytotoxicity. As a result, our aptamer-conjugated GNRs constitute ideal cancer-selective multifunctional probes and promising candidates as photothermal therapy agents.
Gallina , M E , Zhou , Y , Johnson , C J , Harris-Birtill , D , Singh , M , Zhao , H , Ma , D , Cass , T & Elson , D S 2016 , ' Aptamer-conjugated, fluorescent gold nanorods as potential cancer theradiagnostic agents ' Materials Science and Engineering: B , vol 59 , pp. 324-332 . DOI: 10.1016/j.msec.2015.09.101
Materials Science and Engineering: B
© 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Funding for this project was provided by the ERC grant StG242991.
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