PMID- 18976469 OWN - NLM STAT- MEDLINE DCOM- 20081211 LR - 20220408 IS - 1471-2199 (Electronic) IS - 1471-2199 (Linking) VI - 9 DP - 2008 Oct 31 TI - Instability of standard PCR reference genes in adipose-derived stem cells during propagation, differentiation and hypoxic exposure. PG - 98 LID - 10.1186/1471-2199-9-98 [doi] AB - BACKGROUND: For the accurate determination of gene expression changes during growth and differentiation studies on adipose-derived stem cells (ASCs), quantitative real-time RT-PCR has become a method of choice. The technology is very sensitive, however, without a proper selection of reference genes, to which the genes of interest are normalized, erroneous results may be obtained. RESULTS: In this study, we have compared the gene expression levels of a panel of twelve widely used reference genes during hypoxic culture, osteogenic and chondrogenic differentiation, and passaging of primary human ASCs. We found that several of the commonly used reference genes including 18S rRNA, glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and beta-actin were unsuitable for normalization in the conditions we tested, whereas tyrosine 3/tryptophan 5-monooxygenase activation protein (YMHAZ), TATAA-box binding protein (TBP), beta-glucuronidase (GUSB) were the most stable across all conditions. CONCLUSION: When determining gene expression levels in adipose-derived stem cells, we recommend normalizing transcription levels to the geometric mean of YMHAZ, TBP and GUSB. FAU - Fink, Trine AU - Fink T AD - Laboratory for Stem Cell Research, Aalborg University, Denmark. trinef@hst.aau.dk FAU - Lund, Pia AU - Lund P FAU - Pilgaard, Linda AU - Pilgaard L FAU - Rasmussen, Jeppe Grondahl AU - Rasmussen JG FAU - Duroux, Meg AU - Duroux M FAU - Zachar, Vladimir AU - Zachar V LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20081031 PL - England TA - BMC Mol Biol JT - BMC molecular biology JID - 100966983 RN - 0 (Actins) RN - 0 (RNA, Ribosomal, 18S) RN - 63231-63-0 (RNA) RN - EC 1.2.1.- (Glyceraldehyde-3-Phosphate Dehydrogenases) RN - EC 3.2.1.31 (Glucuronidase) SB - IM MH - Actins/genetics MH - Adipose Tissue/*cytology MH - Adult MH - *Cell Differentiation MH - Chondrogenesis MH - Female MH - *Gene Expression Profiling MH - Glucuronidase/genetics MH - Glyceraldehyde-3-Phosphate Dehydrogenases/genetics MH - Humans MH - Hypoxia/*genetics MH - Mesenchymal Stem Cells/chemistry/*cytology MH - Middle Aged MH - Osteogenesis MH - Polymerase Chain Reaction/*standards MH - RNA/analysis MH - RNA, Ribosomal, 18S/genetics MH - Reference Standards PMC - PMC2585587 EDAT- 2008/11/04 09:00 MHDA- 2008/12/17 09:00 PMCR- 2008/10/31 CRDT- 2008/11/04 09:00 PHST- 2008/05/24 00:00 [received] PHST- 2008/10/31 00:00 [accepted] PHST- 2008/11/04 09:00 [pubmed] PHST- 2008/12/17 09:00 [medline] PHST- 2008/11/04 09:00 [entrez] PHST- 2008/10/31 00:00 [pmc-release] AID - 1471-2199-9-98 [pii] AID - 10.1186/1471-2199-9-98 [doi] PST - epublish SO - BMC Mol Biol. 2008 Oct 31;9:98. doi: 10.1186/1471-2199-9-98.