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Effects of physicochemical properties of TiO2 nanomaterials for pulmonary inflammation, acute phase response and alveolar proteinosis in intratracheally exposed mice
- Source :
- Toxicology and Applied Pharmacology, Toxicol. Appl. Pharmacol. 386:114830 (2020), Danielsen, P H, Knudsen, K B, Štrancar, J, Umek, P, Koklič, T, Garvas, M, Vanhala, E, Savukoski, S, Ding, Y, Madsen, A M, Jacobsen, N R, Weydahl, I K, Berthing, T, Poulsen, S S, Schmid, O, Wolff, H & Vogel, U B 2020, ' Effects of physicochemical properties of TiO 2 nanomaterials for pulmonary inflammation, acute phase response and alveolar proteinosis in intratracheally exposed mice ', Toxicology and Applied Pharmacology, vol. 386, 114830 . https://doi.org/10.1016/j.taap.2019.114830
- Publication Year :
- 2019
-
Abstract
- Nanomaterial (NM) characteristics may affect the pulmonary toxicity and inflammatory response, including specific surface area, size, shape, crystal phase or other surface characteristics. Grouping of TiO2 in hazard assessment might be challenging because of variation in physicochemical properties. We exposed C57BL/6 J mice to a single dose of four anatase TiO2 NMs with various sizes and shapes by intratracheal instillation and assessed the pulmonary toxicity 1, 3, 28, 90 or 180 days post-exposure. The quartz DQ12 was included as benchmark particle. Pulmonary responses were evaluated by histopathology, electron microscopy, bronchoalveolar lavage (BAL) fluid cell composition and acute phase response. Genotoxicity was evaluated by DNA strand break levels in BAL cells, lung and liver in the comet assay. Multiple regression analyses were applied to identify specific TiO2 NMs properties important for the pulmonary inflammation and acute phase response. The TiO2 NMs induced similar inflammatory responses when surface area was used as dose metrics, although inflammatory and acute phase response was greatest and more persistent for the TiO2 tube. Similar histopathological changes were observed for the TiO2 tube and DQ12 including pulmonary alveolar proteinosis indicating profound effects related to the tube shape. Comparison with previously published data on rutile TiO2 NMs indicated that rutile TiO2 NMs were more inflammogenic in terms of neutrophil influx than anatase TiO2 NMs when normalized to total deposited surface area. Overall, the results suggest that specific surface area, crystal phase and shape of TiO2 NMs are important predictors for the observed pulmonary effects of TiO2 NMs.
- Subjects :
- 0301 basic medicine
Pathology
medicine.medical_specialty
Pulmonary toxicity
Alveolar proteinosis
GENOTOXICITY
Acute phase response
INHALATION
DNA STRAND BREAKS
Toxicology
CARBON NANOTUBES
03 medical and health sciences
0302 clinical medicine
INSTILLATION
NANOPARTICLES
medicine
PARTICLES
CYTOTOXICITY
Titanium Dioxide
Nanoparticles
Crystal Phase
Inflammation
Acute Phase Response
Pulmonary Alveolar Proteinosis
Pharmacology
Lung
Inhalation
medicine.diagnostic_test
Chemistry
technology, industry, and agriculture
Acute-phase protein
medicine.disease
Crystal phase
3. Good health
Comet assay
030104 developmental biology
medicine.anatomical_structure
Bronchoalveolar lavage
030220 oncology & carcinogenesis
CELLS
Titanium dioxide
3111 Biomedicine
Pulmonary alveolar proteinosis
LUNG
Subjects
Details
- ISSN :
- 0041008X
- Database :
- OpenAIRE
- Journal :
- Toxicology and Applied Pharmacology
- Accession number :
- edsair.doi.dedup.....35e0a67e12f94e660e6485f4e70d67ea
- Full Text :
- https://doi.org/10.1016/j.taap.2019.114830