Chimeric mice with human hepatocytes: A new system for genotoxicity studies
2019
Abstract
Genotoxicity
assaysare characterized by a method, an in vitro or in vivo target, and an endpoint. Many cell types have been used as targets, including bacterial cells, cultured mammalian cells, and rodent cells in vivo . Human cells are the most important target for evaluating the risk to humans associated with exposure to chemicals. Almost exclusively, the human cells used in
genotoxicitytests have been cultured cells. Here, we have tested human hepatocytes in PXB-mice ® , chimeric mice in which the liver has been
repopulatedwith human hepatocytes, as a source of target cells for in vivo
genotoxicity
assays. We applied the single-cell gel electrophoresis (
comet)
assayto detect DNA damage and the
micronucleus
assayto evaluate chromosomal aberrations. These chimeric mice can serve as a valuable model system for
genotoxicity
assays.
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