Dermal absorption of amorphous nanosilica particles after topical exposure for three days
Hirai, T.; Yoshikawa, T.; Nabeshi, H.; Yoshida, T.; Akase, T.; Yoshioka, Y.; Itoh, N.; Tsutsumi, Y.
Die Pharmazie 67(8): 742-743
2012
ISSN/ISBN: 0031-7144 PMID: 22957443 Document Number: 656513
The skin penetration and cellular localization of well-dispersed amorphous nanosilica particles (nSPs) with a diameter of 70 nm was analyzed in mice. Our results suggest that after topical exposure for three days the particles penetrate the skin barrier and are transported to the lymph nodes. These findings underscore the need to examine biological effects following dermal exposure to nSPs for the development of safer use of nSPs.