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The effect of nanoparticle size on theranostic systems: the optimal particle size for imaging is not necessarily optimal for drug delivery
Author(s): Tamar Dreifuss; Oshra Betzer; Eran Barnoy; Menachem Motiei; Rachela Popovtzer
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Paper Abstract

Theranostics is an emerging field, defined as combination of therapeutic and diagnostic capabilities in the same material. Nanoparticles are considered as an efficient platform for theranostics, particularly in cancer treatment, as they offer substantial advantages over both common imaging contrast agents and chemotherapeutic drugs. However, the development of theranostic nanoplatforms raises an important question: Is the optimal particle for imaging also optimal for therapy? Are the specific parameters required for maximal drug delivery, similar to those required for imaging applications? Herein, we examined this issue by investigating the effect of nanoparticle size on tumor uptake and imaging. Anti-epidermal growth factor receptor (EGFR)-conjugated gold nanoparticles (GNPs) in different sizes (diameter range: 20–120 nm) were injected to tumor bearing mice and their uptake by tumors was measured, as well as their tumor visualization capabilities as tumor-targeted CT contrast agent. Interestingly, the results showed that different particles led to highest tumor uptake or highest contrast enhancement, meaning that the optimal particle size for drug delivery is not necessarily optimal for tumor imaging. These results have important implications on the design of theranostic nanoplatforms.

Paper Details

Date Published: 20 February 2018
PDF: 8 pages
Proc. SPIE 10506, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XV, 1050613 (20 February 2018); doi: 10.1117/12.2287392
Show Author Affiliations
Tamar Dreifuss, Bar-Ilan Univ. (Israel)
Oshra Betzer, Bar-Ilan Univ. (Israel)
Eran Barnoy, Bar-Ilan Univ. (Israel)
Menachem Motiei, Bar-Ilan Univ. (Israel)
Rachela Popovtzer, Bar-Ilan Univ. (Israel)

Published in SPIE Proceedings Vol. 10506:
Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XV
Alexander N. Cartwright; Dan V. Nicolau; Dror Fixler, Editor(s)

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