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Nanoscale radiotherapy with hafnium oxide nanoparticles
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Journal Article
Nanoscale radiotherapy with hafnium oxide nanoparticles
2012
Overview
There is considerable interest in approaches that could improve the therapeutic window of radiotherapy. In this study, hafnium oxide nanoparticles were designed that concentrate in tumor cells to achieve intracellular high-energy dose deposit.
Conventional methods were used, implemented in different ways, to explore interactions of these high-atomic-number nanoparticles and ionizing radiation with biological systems.
Using the Monte Carlo simulation, these nanoparticles, when exposed to high-energy photons, were shown to demonstrate an approximately ninefold radiation dose enhancement compared with water. Importantly, the nanoparticles show satisfactory dispersion and persistence within the tumor and they form clusters in the cytoplasm of cancer cells. Marked antitumor activity is demonstrated in human cancer models. Safety is similar in treated and control animals as demonstrated by a broad program of toxicology evaluation.
These findings, supported by good tolerance, provide the basis for developing this new type of nanoparticle as a promising anticancer approach in human patients.
Publisher
Future Medicine Ltd
Subject
/ cancer
/ Cell Survival - radiation effects
/ Female
/ Hafnium
/ Hafnium - administration & dosage
/ Humans
/ Mice
/ Nanoparticles - administration & dosage
/ Nanoparticles - adverse effects
/ NBTXR3
/ Neoplasms - diagnostic imaging
/ Oxides - administration & dosage
/ Radiation-Sensitizing Agents - administration & dosage
/ Radiation-Sensitizing Agents - adverse effects
/ Radiation-Sensitizing Agents - pharmacokinetics
/ therapy
/ Tumor Burden - radiation effects
/ Tumors
