title: [Effects of inhibition of PKC alpha on breast cancer cell phenotype and expressions of cyclin E and CDK2].
abstract: Human breast cancer cell line Bcap-37 was stably transfected with the plasmid expressing antisense PKC alpha RNA, and cells, in which PKC alpha was inhibited due to antisense PKC alpha RNA, were isolated. Changes in serum-dependent growth in cell culture, cell clonogenicity in soft agar and growth in nude mice were tested, and the expressions of cyclin E and CDK2 were analyzed. After PKC alpha was inhibited, the cells showed that serum-dependent growth and anchorage-dependent growth enhanced, tumorigenicity in nude mice decreased. The results suggest that less aggressive breast cancer phenotypes may be induced by inhibition of PKC alpha. Levels of cyclin E and CDK2 mRNA in cells with antisense PKC alpha RNA were lower than those in control cell. These indicate that signal transduction system with PKC alpha is closely related to cell cycle control system with cyclin/CDK in the functions.
authors.affiliation: Lab. of Cell Biology, Department of Biology, Beijing Normal University, Beijing 100875.
authors.forename: J L
authors.initials: JL
authors.lastname: Sang
authors.forename: Y C
authors.initials: YC
authors.lastname: Wang
mesh_terms: D000818:Animals; D001943:Breast Neoplasms / Q000378:metabolism* / Q000473:pathology; D042846:CDC2-CDC28 Kinases; D019927:Cyclin E / Q000096:biosynthesis*; D051357:Cyclin-Dependent Kinase 2; D018844:Cyclin-Dependent Kinases / Q000096:biosynthesis*; D005260:Female; D006801:Humans; D008325:Mammary Neoplasms, Experimental / Q000473:pathology; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D011493:Protein Kinase C / Q000096:biosynthesis* / Q000235:genetics*; D051571:Protein Kinase C-alpha; D017346:Protein Serine-Threonine Kinases / Q000096:biosynthesis*; D015398:Signal Transduction; D014162:Transfection; D014407:Tumor Cells, Cultured
chemical_list: D019927:Cyclin E; D017346:Protein Serine-Threonine Kinases; C496628:PRKCA protein, human; C496630:Prkca protein, mouse; D011493:Protein Kinase C; D051571:Protein Kinase C-alpha; D042846:CDC2-CDC28 Kinases; C495894:CDK2 protein, human; C495893:Cdk2 protein, mouse; D051357:Cyclin-Dependent Kinase 2; D018844:Cyclin-Dependent Kinases