Premium
Time‐dependent bioaccumulation of distinct rod‐type TiO 2 nanoparticles: Comparison by crystalline phase
Author(s) -
Park EunJung,
Lee GwangHee,
Yoon Cheolho,
Kang MinSung,
Kim Soo Nam,
Cho MyungHaing,
Kim JaeHo,
Kim DongWan
Publication year - 2014
Publication title -
journal of applied toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.784
H-Index - 87
eISSN - 1099-1263
pISSN - 0260-437X
DOI - 10.1002/jat.3006
Subject(s) - nanoparticle , brookite , anatase , titanium dioxide , bioaccumulation , surface charge , chemistry , biophysics , phase (matter) , chemical engineering , nanotechnology , materials science , environmental chemistry , photocatalysis , biochemistry , biology , organic chemistry , engineering , catalysis
A complete understanding of the interaction between nanoparticles and biological systems, including nanoparticle uptake and distribution and the biological responses, could guide the design of safer and more effective nanoparticles than those currently available. In this study, we compared the distribution in mice over time of two rod‐type titanium dioxide nanoparticles (TiNPs) that feature distinct phases, anatase (ATO) and brookite (BTO). Surface areas of BTO and ATO were estimated to be 102 and 268 m 2 g –1 , respectively, and negative charge on the surface of ATO was higher than that of BTO in deionized water. Both TiNPs were rapidly distributed into tissues after injection. At 4 weeks after injection, both TiNPs were maximally accumulated in the spleen, followed by the liver, but the total accumulation of ATO in tissues measured in this study was more than that of BTO. Moreover, the cellular antioxidant function was similar although the levels of Ti measured in tissues were distinct between the two TiNPs. Based on these results, we suggest that the fate of TiNPs in the body may differ according to the size and surface charge of the TiNPs even when their shape is the same. Copyright © 2014 John Wiley & Sons, Ltd.