title: Hepatic temporal gene expression profiling in Helicobacter hepaticus-infected A/JCr mice.
abstract: Helicobacter hepaticus infection of A/JCr mice is a model of infectious liver cancer. We monitored hepatic global gene expression profiles in H. hepaticus infected and control male A/JCr mice at 3 months, 6 months, and 1 year of age using an Affymetrix-based oligonucleotide microarray platform on the premise that a specific genetic expression signature at isolated time points would be indicative of disease status. Model based expression index comparisons generated by dChip yielded consistent profiles of differential gene expression for H. hepaticus infected male mice with progressive liver disease versus uninfected control mice within each age group. Linear discriminant analysis and principal component analysis allowed segregation of mice based on combined age and lesion status, or age alone. Up-regulation of putative tumor markers correlated with advancing hepatocellular dysplasia. Transcriptionally down-regulated genes in mice with liver lesions included those related to peroxisome proliferator, fatty acid, and steroid metabolism pathways. In conclusion, transcriptional profiling of hepatic genes documented gene expression signatures in the livers of H. hepaticus infected male A/JCr mice with chronic progressive hepatitis and preneoplastic liver lesions, complemented the histopathological diagnosis, and suggested molecular targets for the monitoring and intervention of disease progression prior to the onset of hepatocellular neoplasia.
authors.affiliation: Division of Comparative Medicine, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
authors.forename: Samuel R
authors.initials: SR
authors.lastname: Boutin
authors.forename: Arlin B
authors.initials: AB
authors.lastname: Rogers
authors.forename: Zeli
authors.initials: Z
authors.lastname: Shen
authors.forename: Rebecca C
authors.initials: RC
authors.lastname: Fry
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Love
authors.forename: Prashant R
authors.initials: PR
authors.lastname: Nambiar
authors.forename: Sebastian
authors.initials: S
authors.lastname: Suerbaum
authors.forename: James G
authors.initials: JG
authors.lastname: Fox
mesh_terms: D000375:Aging / Q000235:genetics; D000818:Animals; D049109:Cell Proliferation; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D005802:Genes, MHC Class II; D016481:Helicobacter Infections / Q000235:genetics / Q000378:metabolism*; D044923:Helicobacter hepaticus; D007249:Inflammation / Q000235:genetics; D008099:Liver / Q000378:metabolism*; D051379:Mice; D008805:Mice, Inbred A; D020411:Oligonucleotide Array Sequence Analysis
chemical_list: D003577:Cytochrome P-450 Enzyme System