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Journal of Biomedicine and Biotechnology
Volume 2010, Article ID 362524, 8 pages
Research Article

Acute, Multiple-Dose Dermal and Genetic Toxicity of Nu-3: A Novel Antimicrobial Agent

1College of Veterinary Medicine, China Agricultura University, Beijing 100193, China
2Department of Medical and Molecular Biosciences, University of Technology Sydney, Broadway, Sydney, NSW 2007, Australia
3Xiangya Hospital, Center for Molecular Medicine of Central South University, Changsha 410078, China

Received 26 January 2010; Revised 10 May 2010; Accepted 9 June 2010

Academic Editor: Schwan William

Copyright © 2010 Juan Sun et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Nu-3 [butyl-phosphate- 5 -thymidine- 3 -phosphate-butyl] is a modified nucleotide that has been shown to have antimicrobial activity against a range of bacteria including Pseudomonas aeruginosa. However, data on the toxicological profile of Nu-3 are still lacking. In the present study, the toxicity of Nu-3 was evaluated by the following studies: acute oral toxicity, dermal and mucous membrane irritation, multiple-dose toxicity and genotoxicity in vivo and vitro. The acute oral toxicity test in mice showed that Nu-3 had an L D 5 0 of 2001mg/kg body weight. The irritation tests on rats revealed that Nu-3 was not irritant, with an irritation scoring of 0. The multiple-dose toxicity study in rats showed that Nu-3 did not cause significant changes in histology, selected serum chemistry, and hematological parameters compared to the controls. Rats administrated with multiple-doses of Nu-3 showed no visible toxic symptoms. Both in vitro and in vivo, Nu-3 exhibited no notable genetic toxicity. Overall, the data suggest that Nu-3 is hypotoxic or nontoxic antimicrobial compound that warrants being further developed for treating Pseudomonas aeruginosa infection.