Publication details

Penetration, distribution and brain toxicity of titanium nanoparticles in rodents' body: a review.

Authors

ZEMAN Tomáš LOH El -Wui ČIERNY Daniel ŠERÝ Omar

Year of publication 2018
Type Article in Periodical
Magazine / Source IET Nanobiotechnology
MU Faculty or unit

Faculty of Science

Citation
Doi http://dx.doi.org/10.1049/iet-nbt.2017.0109
Keywords nanoparticles
Description Titanium dioxide (TiO2) has been vastly used commercially, especially as white pigment in paints, colorants, plastics, coatings, cosmetics. There are three common exposure routes for TiO2: (i) inhalation exposure, (ii) exposure via gastrointestinal tract, (iii) dermal exposure. Inhalation and gastrointestinal exposure appear to be the most probable ways of exposure, although nanoparticle (NP) penetration is limited. However, the penetration rate may increase substantially when the tissue is impaired. When TiO2 NPs migrate into the circulatory system, they can be distributed into all tissues including brain. In brain, TiO2 lead to oxidative stress mediated by the microglia phagocytic cells which respond to TiO2 NPs by the production and release of superoxide radicals that convert to multiple reactive oxygen species (ROS). The ROS production may also cause the damage of blood-brain barrier which then becomes more permeable for NPs. Moreover, several studies have showed neuron degradation and the impairment of spatial recognition memory and learning abilities in laboratory rodent exposed to TiO2 NPs.

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