title: Metastatic effect of LY-6K gene in breast cancer cells.
abstract: The over-expression of urokinase receptor in breast cancer cells results in increased tumor invasion, growth and metastasis. As LY-6K belongs to the Ly6/uPAR superfamily, we assessed the association of LY-6K with metastasis in breast cancer cell lines and how the LY-6K gene mediates cancer cell metastasis. The migration ability of cells in which expression of LY-6K gene is up- or down-regulated was investigated by transfecting LY-6K naked DNA and treating LY-6K siRNA. Assays of wound healing, migration and invasion were performed. The assays demonstrated that cell migration significantly increased when LY-6K gene is over-expressed or LY-6K protein is abnormally expressed in breast cancer cells. In addition, LY-6K caused cancer cell metastasis and it is linked to the Ras/ERK signaling pathway. Our results suggest that LY-6K meaningfully participates in breast cancer cell metastasis by influencing cell migration and invasion through the Ras/ERK pathway.
authors.affiliation: Department of Biological Science, Sookmyung Women's University, 52 Hyochangwonro, Yongsan-gu, Seoul, Korea.
authors.forename: Suh Hee
authors.initials: SH
authors.lastname: Choi
authors.forename: Hyun Kyung
authors.initials: HK
authors.lastname: Kong
authors.forename: So Young
authors.initials: SY
authors.lastname: Park
authors.forename: Jong Hoon
authors.initials: JH
authors.lastname: Park
mesh_terms: D000950:Antigens, Ly / Q000235:genetics*; D014408:Biomarkers, Tumor / Q000235:genetics; D015153:Blotting, Western; D001943:Breast Neoplasms / Q000235:genetics* / Q000473:pathology*; D045744:Cell Line, Tumor; D002465:Cell Movement / Q000235:genetics*; D022202:Chromosomes, Artificial, Bacterial; D048049:Extracellular Signal-Regulated MAP Kinases / Q000235:genetics; D005260:Female; D006801:Humans; D018613:Microscopy, Confocal; D009361:Neoplasm Invasiveness / Q000235:genetics* / Q000473:pathology; D055293:Receptors, Urokinase Plasminogen Activator / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015398:Signal Transduction / Q000235:genetics; D014162:Transfection
chemical_list: D000950:Antigens, Ly; D014408:Biomarkers, Tumor; D055293:Receptors, Urokinase Plasminogen Activator; D048049:Extracellular Signal-Regulated MAP Kinases