DNA Rearrangement Causes Hepatocarcinogenesis in Albumin-plasminogen Activator Transgenic Mice
Overview
Affiliations
Hepatocyte-directed production of urokinase-type plasminogen activator (uPA) in transgenic mice is hepatotoxic. Infrequently, hepatocytes arise that do not express uPA, due to physical loss of transgene DNA, and these cells clonally repopulate the entire liver within 3 months of birth. Surprisingly, hepatic tumors appear in these mice beginning at 8 months of age despite the fact that uPA is not oncogenic or genotoxic. Analysis of the transgene locus reveals that tumors arise only from a particular subclass of transgene-deficient cells in which the entire transgene array, and possibly a significant amount of flanking DNA, is deleted. Considering that all transgene-deficient regenerative nodules undergo extensive replication but only a subset gives rise to tumors, we propose that loss of genomic DNA, not mitogenesis per se, is a primary carcinogenic determinant in this model of hepatocarcinogenesis.
Animal Modeling of Pediatric Liver Cancer.
Whitlock R, Yang T, Vasudevan S, Woodfield S Cancers (Basel). 2020; 12(2).
PMID: 31979130 PMC: 7072332. DOI: 10.3390/cancers12020273.
Generation of Novel Chimeric Mice with Humanized Livers by Using Hemizygous cDNA-uPA/SCID Mice.
Tateno C, Kawase Y, Tobita Y, Hamamura S, Ohshita H, Yokomichi H PLoS One. 2015; 10(11):e0142145.
PMID: 26536627 PMC: 4633119. DOI: 10.1371/journal.pone.0142145.
Hepatocyte-specific deletion of DDB1 induces liver regeneration and tumorigenesis.
Yamaji S, Zhang M, Zhang J, Endo Y, Bibikova E, Goff S Proc Natl Acad Sci U S A. 2010; 107(51):22237-42.
PMID: 21135245 PMC: 3009836. DOI: 10.1073/pnas.1015793108.
Douglas D, Kawahara T, Sis B, Bond D, Fischer K, Tyrrell D PLoS One. 2010; 5(2):e9209.
PMID: 20174638 PMC: 2823785. DOI: 10.1371/journal.pone.0009209.
Liver repopulation and carcinogenesis: two sides of the same coin?.
Marongiu F, Doratiotto S, Montisci S, Pani P, Laconi E Am J Pathol. 2008; 172(4):857-64.
PMID: 18321999 PMC: 2276408. DOI: 10.2353/ajpath.2008.070910.