Nano Archive

Alumina nanoparticles induce expression of endothelial cell adhesion molecules

Oesterling, Elizabeth and Chopra, Nitin and Gavalas, Vasileios and Arzuaga, Xabier and Lim, Eun Jin and Sultana, Rukhsana and Butterfield, D. Allan and Bachas, Leonidas and Hennig, Bernhard (2008) Alumina nanoparticles induce expression of endothelial cell adhesion molecules. TOXICOLOGY LETTERS, 178 (3). pp. 160-166.

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Nanotechnology is a rapidly growing industry that has elicited much concern because of the lack of available toxicity data. Exposure to ultrafine particles may be a risk for the development of vascular diseases due to dysfunction of the vascular endothelium. Increased endothelial adhesiveness is a critical first step in the development of vascular diseases, such as atherosclerosis. The hypothesis that alumina nanoparticles increase inflammatory markers of the endothelium, measured by the induction of adhesion molecules as well as the adhesion of monocytes to the endothelial monolayer, was tested. Following characterization of alumina nanoparticles by transmission electron microscopy (TEM), electron diffraction, and particle size distribution analysis, endothelial cells were exposed to alumina at various concentrations and times. Both porcine pulmonary artery endothelial cells and human umbilical vein endothelial cells showed increased mRNA and protein expression of VCAM-1, ICAM-1, and ELAM-1. Furthermore, human endothelial cells treated with alumina particles showed increased adhesion of activated monocytes. The alumina particles tended to agglomerate at physiological pH in serum-containing media, which led to a range of particle sizes from nano to micron size during treatment conditions. These data show that alumina nanoparticles can elicit a proinflammatory response and thus present a cardiovascular disease risk. (c) 2008 Published by Elsevier Ireland Ltd.

Item Type:Article
Uncontrolled Keywords:manufactured nanoparticles; endothelium; adhesion molecules; cardiovascular disease; atherosclerosis
Subjects:NanoSafety > Environment, health and safety aspects of nanotechnology
ID Code:745
Deposited By:SPI
Deposited On:21 Jan 2009 11:17
Last Modified:21 Jan 2009 11:17

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