title: Differential gene expression in adipose stem cells cultured in allogeneic human serum versus fetal bovine serum.
abstract: In preclinical studies, human adipose stem cells (ASCs) have been shown to have therapeutic applicability, but standard expansion methods for clinical applications remain yet to be established. ASCs are typically expanded in the medium containing fetal bovine serum (FBS). However, sera and other animal-derived culture reagents stage safety issues in clinical therapy, including possible infections and severe immune reactions. By expanding ASCs in the medium containing human serum (HS), the problem can be eliminated. To define how allogeneic HS (alloHS) performs in ASC expansion compared to FBS, a comparative in vitro study in both serum supplements was performed. The choice of serum had a significant effect on ASCs. First, to reach cell proliferation levels comparable with 10% FBS, at least 15% alloHS was required. Second, while genes of the cell cycle pathway were overexpressed in alloHS, genes of the bone morphogenetic protein receptor-mediated signaling on the transforming growth factor beta signaling pathway regulating, for example, osteoblast differentiation, were overexpressed in FBS. The result was further supported by differentiation analysis, where early osteogenic differentiation was significantly enhanced in FBS. The data presented here underscore the importance of thorough investigation of ASCs for utilization in cell therapies. This study is a step forward in the understanding of these potential cells.
authors.affiliation: Regea-Institute for Regenerative Medicine, University of Tampere and Tampere University Hospital, Tampere, Finland. bettina.lindroos@regea.fi
authors.forename: Bettina
authors.initials: B
authors.lastname: Lindroos
authors.forename: Kaisa-Leena
authors.initials: KL
authors.lastname: Aho
authors.forename: Hannu
authors.initials: H
authors.lastname: Kuokkanen
authors.forename: Sari
authors.initials: S
authors.lastname: Räty
authors.forename: Heini
authors.initials: H
authors.lastname: Huhtala
authors.forename: Riina
authors.initials: R
authors.lastname: Lemponen
authors.forename: Olli
authors.initials: O
authors.lastname: Yli-Harja
authors.forename: Riitta
authors.initials: R
authors.lastname: Suuronen
authors.forename: Susanna
authors.initials: S
authors.lastname: Miettinen
mesh_terms: D000273:Adipose Tissue / Q000166:cytology*; D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D002417:Cattle; D002453:Cell Cycle / Q000235:genetics; D002462:Cell Membrane / Q000378:metabolism; D049109:Cell Proliferation; D048430:Cell Shape; D002478:Cells, Cultured; D016000:Cluster Analysis; D005260:Female; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D006801:Humans; D008875:Middle Aged; D039902:Multipotent Stem Cells / Q000166:cytology / Q000378:metabolism; D015203:Reproducibility of Results; D020133:Reverse Transcriptase Polymerase Chain Reaction; D044967:Serum / Q000378:metabolism*; D015398:Signal Transduction / Q000235:genetics; D013234:Stem Cells / Q000166:cytology / Q000378:metabolism*
chemical_list: D015415:Biomarkers