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TiO 2 Nanomaterials Non-Controlled Contamination Could Be Hazardous for Normal Cells Located in the Field of Radiotherapy.
- Source :
-
International journal of molecular sciences [Int J Mol Sci] 2020 Jan 31; Vol. 21 (3). Date of Electronic Publication: 2020 Jan 31. - Publication Year :
- 2020
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Abstract
- Among nanomaterials (NMs), titanium dioxide (TiO <subscript>2</subscript> ) is one of the most manufactured NMs and can be found in many consumers' products such as skin care products, textiles and food (as E171 additive). Moreover, due to its most attractive property, a photoactivation upon non-ionizing UVA radiation, TiO <subscript>2</subscript> NMs is widely used as a decontaminating agent. Uncontrolled contaminations by TiO <subscript>2</subscript> NMs during their production (professional exposure) or by using products (consumer exposure) are rather frequent. So far, TiO <subscript>2</subscript> NMs cytotoxicity is still a matter of controversy depending on biological models, types of TiO <subscript>2</subscript> NMs, suspension preparation and biological endpoints. TiO <subscript>2</subscript> NMs photoactivation has been widely described for UV light radiation exposure, it could lead to reactive oxygen species production, known to be both cyto- and genotoxic on human cells. After higher photon energy exposition, such as X-rays used for radiotherapy and for medical imaging, TiO <subscript>2</subscript> NMs photoactivation still occurs. Importantly, the question of its hazard in the case of body contamination of persons receiving radiotherapy was never addressed, knowing that healthy tissues surrounding the tumor are indeed exposed. The present work focuses on the analysis of human normal bronchiolar cell response after co-exposition TiO <subscript>2</subscript> NMs (with different coatings) and ionizing radiation. Our results show a clear synergistic effect, in terms of cell viability, cell death and oxidative stress, between TiO <subscript>2</subscript> NMS and radiation.<br />Competing Interests: The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results
- Subjects :
- Bronchioles drug effects
Bronchioles metabolism
Bronchioles radiation effects
Cell Line
Cell Proliferation drug effects
Cell Proliferation radiation effects
Cell Survival drug effects
Cell Survival radiation effects
Humans
Metal Nanoparticles toxicity
Oxidative Stress
Reactive Oxygen Species metabolism
Bronchioles cytology
Radiotherapy adverse effects
Titanium toxicity
Subjects
Details
- Language :
- English
- ISSN :
- 1422-0067
- Volume :
- 21
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- International journal of molecular sciences
- Publication Type :
- Academic Journal
- Accession number :
- 32023866
- Full Text :
- https://doi.org/10.3390/ijms21030940