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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Analysis of lacI mutations in Big Blue transgenic mice subjected to parasite-induced inflammation.

Parasite infections have long been associated with specific types of human cancers. Schistosoma hematobium is an inducer of urinary bladder cancer, Helicobacter pylori is a gastric carcinogen, and hepatitis B virus and Opisthorchis viverrini are causative agents of hepatocellular carcinoma. Another liver fluke, Fasciola hepatica, has also been identified as a neoplastic risk agent, primarily in animals. We used F. hepatica-induced inflammation in mice to determine if the presence of an aggressive liver fluke could induce mutagenic events in mammalian tissue. This provides a perspective on the relationship between chronic inflammation and cancer and may be a model for future studies on this complex association. In previous studies using the Big Blue transgenic mouse assay, we demonstrated an increase in lacI mutations in liver cells harvested from mice harboring F. hepatica flukes when compared to uninfected control animals. In these studies, we report on the types of mutations associated with this parasite infection. The observed mutational spectrum roughly corresponded to the spectrum of spontaneous mutations in liver cells when compared to control (uninfected) animals. However, the spectrum of mutations from parasitized animals showed a significant increase in complex changes and multiple mutations (18.2%) when compared to what would be expected from control animals (2.8%).[1]


  1. Analysis of lacI mutations in Big Blue transgenic mice subjected to parasite-induced inflammation. Motorna, O.O., Martin, H., Gentile, G.J., Gentile, J.M. Mutat. Res. (2001) [Pubmed]
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