title: Expression profile identifies novel genes involved in neuronal differentiation.
abstract: In the presence of NGF, PC12 cells extend neuronal processes, cease cell division, become electrically excitable, and undergo several biochemical changes that are detectable in developing sympathetic neurons. We investigated the expression pattern of the apoptosis-related genes at each stage of neuronal differentiation using a cDNA microarray containing 320 apoptosis-related rat genes. By comparing the expression patterns through time-series analysis, we identified candidate genes that appear to regulate neuronal differentiation. Among the candidate genes, HO2 was selected by real-time PCR and Western blot analysis. To identify the roles of selected genes in the stages of neuronal differentiation, transfection of HO2 siRNA in PC12 cells was performed. Down-regulation of HO2 expression causes a reduction in neuronal differentiation in PC12 cells. Our results suggest that the HO2 gene could be related to the regulation of neuronal differentiation levels.
authors.affiliation: Department of Biological Science, Sookmyung Women's University, Seoul, Korea.
authors.forename: Jung Hee
authors.initials: JH
authors.lastname: Kim
authors.forename: Tae Young
authors.initials: TY
authors.lastname: Lee
authors.forename: Kyung Hyun
authors.initials: KH
authors.lastname: Yoo
authors.forename: Hyo Soo
authors.initials: HS
authors.lastname: Lee
authors.forename: Sun A
authors.initials: SA
authors.lastname: Cho
authors.forename: Jong Hoon
authors.initials: JH
authors.lastname: Park
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000378:metabolism*; D015153:Blotting, Western; D002454:Cell Differentiation / Q000235:genetics*; D002478:Cells, Cultured; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D006419:Heme Oxygenase (Decyclizing) / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism; D020932:Nerve Growth Factor / Q000494:pharmacology; D009474:Neurons / Q000166:cytology* / Q000378:metabolism; D020411:Oligonucleotide Array Sequence Analysis; D016716:PC12 Cells; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D034741:RNA, Small Interfering / Q000494:pharmacology; D051381:Rats; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014162:Transfection
chemical_list: D015415:Biomarkers; D012333:RNA, Messenger; D034741:RNA, Small Interfering; D020932:Nerve Growth Factor; D006419:Heme Oxygenase (Decyclizing); C105245:heme oxygenase-2