Journal
TOXICOLOGY
Volume 255, Issue 1-2, Pages 33-37Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.tox.2008.09.025
Keywords
Nanoparticles; Silver; Skin absorption; In vitro; Damaged skin
Categories
Funding
- PRIN 2006 (Progetti di Rilevante Interesse Nazionale-Ministero Italiano dell'Universita e della Ricerca)
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There is a growing interest on nanoparticle safety for topical use. The benefits of nanoparticles have been shown in several scientific fields, but little is known about their potential to penetrate the skin. This study aims at evaluating in vitro skin penetration of silver nanoparticles. Experiments were performed using the Franz diffusion cell method with intact and damaged human skin. Physiological solution was used as receiving phase and 70 mu g/cm(2) of silver nanoparticles coated with polyvinylpirrolidone dispersed in synthetic sweat were applied as donor phase to the outer surface of the skin for 24 h. The receptor fluid measurements were performed by electro thermal atomic absorption spectroscopy (ETAAS). Human skin penetration was also determined by using transmission electron microscope (TEM) to verify the location of silver nanoparticles in exposed membranes. Median silver concentrations of 0.46 ng cm(-2) (range
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