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American Chemical Society's Weekly PressPac -- Aug. 8, 2007
Date:8/13/2007

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CONTACT:
Christine Jr me, Ph.D.
University of Liege
Liege, Belgium
Phone: 32-4-3663491
Fax: 32-4-3663497
Email: c.jerome@ulg.ac.be


ARTICLE #2 FOR IMMEDIATE RELEASE

Easing concerns about a promising new medical imaging agent
Chemical Research in Toxicology

In a study that eases concern about the toxicity of nanoparticles being considered for use in medical imaging and biomedical research, scientists in North Dakota are reporting no significant toxic effects from tests of silica nanoparticles. It is scheduled for the Aug. 20 issue of ACS Chemical Research in Toxicology, a monthly journal.

Min Wu and Julia Xiaojun Zhao and colleagues point out that scientists hope to use several kinds of nanomaterials that luminesce, or glow, in clinical medicine and biomedical research. Those materials might, for instance, become a new generation of imaging agents that pinpoint the location of diseased tissue in the body. However, the question of whether these nanomaterials are toxic to living cells or organisms has not been fully answered, the researchers explain.

The scientists used laboratory tests on human lung cells to show that luminescent silica nanoparticles did not damage cellular DNA. Our study indicates that the luminescent silica nanoparticle is a promising labeling reagent for various biomedical applications, the study concluded, citing the need for further research on potential long-term toxicity.

ARTICLE #2 FOR IMMEDIATE RELEASE Toxicity of Luminescent Silica Nanoparticles to Living Cells

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American Chemical Society
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