title: Importance of suitable reference gene selection for quantitative RT-PCR during ATDC5 cells chondrocyte differentiation.
abstract: Real-time quantitative reverse transcription-polymerase chain reaction (qPCR) is an efficient and accurate method to detect and compare patterns of gene expression. The reliability of qPCR is highly dependent on the selection of appropriate reference genes used for normalization. By analyzing 16 potential candidates of reference genes (GAPDH, Actb, 18 s, PGK1, Hprt, Tbp, Rpl5, B2M, Gusb, Ppia, UBC, Sdha, Eef1a1, H2afz, Tkt and Ldha) through geNorm, we identified Ppia, Tbp, Hprt and Eef1a1 as the most stable reference genes while UBC, B2M, Gusb as the least stable ones during the chondrocyte differentiation of ATDC5 cells. Considering the low expression of Eef1a1 and Tbp would cause divergent results for they failed to provide accurate normalization for RNA extraction and reverse transcription efficiency, we recommended the use of Ppia and Hprt as the most suitable genes to normalize qPCR. In addition, although GAPDH, Actb and 18 s were usually adopted in most of studies using ATDC5 cells, they were found unstable and then were not ideal reference genes for qPCR assay in ATDC5 cells chondrocyte differentiation. Also, we further confirmed that the Ppia and Hprt worked well during chondrocyte differentiation of mouse mesenchymal cells.
authors.affiliation: School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong, China.
authors.forename: Zhichen
authors.initials: Z
authors.lastname: Zhai
authors.forename: Yongchang
authors.initials: Y
authors.lastname: Yao
authors.forename: Yingjun
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000818:Animals; D002356:Cartilage / Q000378:metabolism; D002454:Cell Differentiation / Q000235:genetics*; D002460:Cell Line; D019902:Chondrocytes / Q000166:cytology* / Q000378:metabolism*; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D005796:Genes / Q000235:genetics*; D056726:Genetic Association Studies; D059630:Mesenchymal Stem Cells / Q000166:cytology / Q000378:metabolism; D051379:Mice; D009928:Organ Specificity / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D012015:Reference Standards; D015203:Reproducibility of Results; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods* / Q000592:standards*; D012984:Software
chemical_list: D012333:RNA, Messenger