title: Gene expression profiling: identification of genes with altered expression in Ayu17-449 knockout mice.
abstract: Ayu17-449, a novel gene in mice, has been identified as a tumor-suppressor gene in myeloid malignancy; its product catalyzes the conversion of 5-methylcytosine of DNA to 5-hydroxymethylcytosine. However, in vivo, its functional target genes and biological function have remained unclear. Based on the assumption that alterations in the expression of the Ayu17-449 gene affect the expression of other related genes, we screened a microarray of altered gene expression in Ayu17-449(-/-) and Ayu17-449(+/+) mice. We identified 4049 genes with altered expression, including 1296 up-regulated (fold change ≥2) and 2753 down-regulated (fold change ≤0.5) genes in knockout mice compared with control mice. We then used qRT-PCR and RT-PCR to validate the chip data. Gene ontology and pathway analysis were performed on these altered genes. We found that these altered genes are functional genes in the complement and coagulation cascades, metabolism, biosynthesis, transcriptional regulation, proteolysis, and intracellular signaling pathways, such as the peroxisome proliferator-activated-receptor signaling pathway, the TNF-α-NF-κB pathway, the Notch signaling pathway, the MAPK signaling pathway, and the insulin signaling pathway. The results of our genome-wide comprehensive study could be helpful for comprehending the underlying functional mechanisms of the Ayu17-449 gene in mammals.
authors.affiliation: Department of Clinical Laboratory, Xinqiao Hospital, Third Military Medical University, Chongqing, China. liyi-12qq@163.com
authors.forename: Y
authors.initials: Y
authors.lastname: Li
authors.forename: T T
authors.initials: TT
authors.lastname: Huang
authors.forename: H
authors.initials: H
authors.lastname: Tang
authors.forename: K I
authors.initials: KI
authors.lastname: Yamamura
authors.forename: X Y
authors.initials: XY
authors.lastname: Pu
mesh_terms: D044503:5-Methylcytosine / Q000031:analogs & derivatives; D000818:Animals; D003596:Cytosine / Q000031:analogs & derivatives / Q000378:metabolism; D004247:DNA / Q000378:metabolism; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D016147:Genes, Tumor Suppressor; D016678:Genome; D051379:Mice; D018345:Mice, Knockout; D016328:NF-kappa B / Q000235:genetics / Q000378:metabolism; D020411:Oligonucleotide Array Sequence Analysis; D060888:Real-Time Polymerase Chain Reaction; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics / Q000378:metabolism
chemical_list: D016328:NF-kappa B; D014409:Tumor Necrosis Factor-alpha; C011865:5-hydroxymethylcytosine; D044503:5-Methylcytosine; D003596:Cytosine; D004247:DNA