Discrimination of genotoxic and non-genotoxic hepatocarcinogens by statistical analysis based on gene expression profiling in the mouse liver as determined by quantitative real-time PCR

作者：Watanabe Takashi; Suzuki Takayoshi; Natsume Masakatsu; Nakajima Madoka; Narumi Kazunori; Hamada Shuichi; Sakuma Tomohiro; Koeda Akiko; Oshida Keiyu; Miyamoto Yohei; Maeda Akihisa; Hirayama Michiasa; Sanada Hisakazu; Honda Hiroshi; Ohyama Wakako; Okada Emiko; Fujiishi Yohei; Sutou Shizuyo; Tadakuma Ayami; Ishikawa Yasuyoshi; Kido Mahoko; Minamiguchi Rina; Hanahara Izumi; Furihata Chie^*

来源：Mutation Research: Genetic Toxicology and Environmental Mutagenesis , 2012, 747(2): 164-175.

DOI：10.1016/j.mrgentox.2012.04.011

• Gene expression
• Quantitative real-time PCR
• PCA
• Gene network
• Mouse liver

The general aim of the present study is to discriminate between mouse genotoxic and non-genotoxic hepatocarcinogens via selected gene expression patterns in the liver as analyzed by quantitative real-time PCR (qPCR) and statistical analysis. qPCR was conducted on liver samples from groups of 5 male, 9-week-old B6C3F(1) mice, at 4 and 48 h following a single intraperitoneal administration of chemicals. We quantified 35 genes selected from our previous DNA microarray studies using 12 different chemicals: 8 genotoxic hepatocarcinogens (2-acetylaminofluorene, 2,4-diaminotoluene, diisopropanolnitrosamine, 4-dimethylaminoazobenzene, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone, N-nitrosomorpholine, quinoline and urethane) and 4 non-genotoxic hepatocarcinogens (1,4-dichlorobenzene, dichlorodiphenyltrichloroethane, di(2-ethylhexyl)phthalate and furan). A considerable number of genes exhibited significant changes in their gene expression ratios (experimental group/control group) analyzed statistically by the Dunnett's test and Welch's t-test. Finally, we distinguished between the genotoxic and non-genotoxic hepatocarcinogens by statistical analysis using principal component analysis (PCA) of the gene expression profiles for 7 genes (Btg2, Ccnf, Ccng1, Lpr1, Mbd1, Phlda3 and Tubb2c) at 4 h and for 12 genes (Aen, Bax, Btg2, Ccnf, Ccng1, Cdkn1a, Gdf15, Lrp1, Mbd1, Phlda3, Plk2 and Tubb2c) at 48 h. Seven major biological processes were extracted from the

• 出版日期2012-9-18