title: Differential gene expression profiling of human epidermal growth factor receptor 2-overexpressing mammary tumor.
abstract: Human epidermal growth factor receptor 2 (HER2) is highly expressed in approximately 30% of breast cancer patients, and substantial evidence supports the relationship between HER2 overexpression and poor overall survival. However, the biological function of HER2 signal transduction pathways is not entirely clear. To investigate gene activation within the pathways, we screened differentially expressed genes in HER2-positive mouse mammary tumor using two-directional suppression subtractive hybridization combined with reverse dot-blotting analysis. Forty genes and expressed sequence tags related to transduction, cell proliferation/growth/apoptosis and secreted/extracellular matrix proteins were differentially expressed in HER2-positive mammary tumor tissue. Among these, 19 were already reported to be differentially expressed in mammary tumor, 11 were first identified to be differentially expressed in mammary tumor in this study but were already reported in other tumors, and 10 correlated with other cancers. These genes can facilitate the understanding of the role of HER2 signaling in breast cancer.
authors.affiliation: Key Laboratory of Protein Chemistry and Developmental Biology of the Education Ministry of China, College of Life Science, Hunan Normal University, Changsha 410081, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.forename: Haining
authors.initials: H
authors.lastname: Peng
authors.forename: Yingli
authors.initials: Y
authors.lastname: Zhong
authors.forename: Daiqiang
authors.initials: D
authors.lastname: Li
authors.forename: Mi
authors.initials: M
authors.lastname: Tang
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Ding
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
mesh_terms: D000818:Animals; D005260:Female; D020869:Gene Expression Profiling; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D015674:Mammary Neoplasms, Animal / Q000378:metabolism*; D051379:Mice; D009363:Neoplasm Proteins / Q000378:metabolism*; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000378:metabolism*; D015533:Transcriptional Activation; D014407:Tumor Cells, Cultured; D015854:Up-Regulation
chemical_list: D009363:Neoplasm Proteins; D018719:Erb-b2 Receptor Tyrosine Kinases