Biological response to nano-scale titanium dioxide (TiO2): role of particle dose, shape, and retention.
Biological response to nano-scale titanium dioxide (TiO2): role of particle dose, shape, and retention.
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DOI:
10.1080/15287394.2013.826567
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
Pinkerton KE
中科院分区:
文献类型:
--
作者:
Silva RM;Teesy C;Franzi L;Weir A;Westerhoff P;Evans JE;Pinkerton KE
TiO2 is one of the most widely used nanomaterials, valued for its highly refractive, photocatalytic and pigmenting properties. TiO2 is also classified by the International Agency for Research on Cancer (IARC) as a possible human carcinogen. The objectives of this study were to establish a lowest observed effect level (LOEL) for nano-scale TiO2, determine TiO2 uptake in the lungs, and estimate toxicity based on physico-chemical properties and retention in the lungs. In vivo lung toxicity of nano-scale TiO2 using varying forms of well-characterized, highly-dispersed TiO2 was assessed. Anatase/rutile P25 spheres (TiO2-P25), pure anatase spheres (TiO2-A), and anatase nanobelts (TiO2-NB) were tested. To determine the effects of dose and particle characteristics, male Sprague-Dawley rats were given TiO2 (0, 20, 70, or 200 µg) via intratracheal instillation. Broncho-alveolar lavage fluid (BALF) and lung tissue were obtained for analysis 1 and 7 days post exposure. Despite abundant TiO2 inclusions in all exposed animals, only TiO2-NB elicited any significant degree of inflammation seen in BALF at the 1-day time-point. This inflammation resolved by 7 days; although, TiO2 particles had not cleared from alveolar macrophages recovered from the lung. Histological examination showed TiO2-NB caused cellular changes at day 1 which were still evident at day 7. We conclude TiO2-NB is the most inflammatory with a lowest observable effect level of 200 µg at 1 day post instillation.
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影响因子:
10.4
作者:
Bonner JC;Silva RM;Taylor AJ;Brown JM;Hilderbrand SC;Castranova V;Porter D;Elder A;Oberdörster G;Harkema JR;Bramble LA;Kavanagh TJ;Botta D;Nel A;Pinkerton KE
通讯作者:
Pinkerton KE
影响因子:
10
作者:
Hamilton RF;Wu N;Porter D;Buford M;Wolfarth M;Holian A
通讯作者:
Holian A
DOI:
10.1080/15287390903232467
发表时间:
2009
期刊:
Journal of toxicology and environmental health. Part A
影响因子:
--
作者:
LeBlanc AJ;Cumpston JL;Chen BT;Frazer D;Castranova V;Nurkiewicz TR
通讯作者:
Nurkiewicz TR
影响因子:
3.8
作者:
Bermudez, E;Mangum, JB;Everitt, JI
通讯作者:
Everitt, JI
影响因子:
3.2
作者:
Nemmar, Abderrahim;Melghit, Khaled;Ali, Badreldin H.
通讯作者:
Ali, Badreldin H.