title: Cell surface and transcriptional characterization of human adipose-derived adherent stromal (hADAS) cells.
abstract: Adult human subcutaneous adipose tissue contains cells with intriguing multilineage developmental plasticity, much like marrow-derived mesenchymal stem cells. Putative stem or progenitor cells from fat have been given many different names in the literature, reflecting an early and evolving consensus regarding their phenotypic characterization. The study reported here used microarrays to evaluate over 170 genes relating to angiogenesis and extracellular matrix in undifferentiated, early-passage human adipose-derived adherent stromal (hADAS) cells isolated from three separate donors. The hADAS populations unanimously transcribed 66% of the screened genes, and 83% were transcribed by at least two of the three populations. The most highly transcribed genes relate to functional groupings such as cell adhesion, matrix proteins, growth factors and receptors, and proteases. The transcriptome of hADAS cells demonstrated by this work reveals many similarities to published profiles of bone marrow mesenchymal stem cells (MSCs). In addition, flow analysis of over 24 hADAS cell surface proteins (n = 7 donors) both confirms and expands on the existing literature and reveals strong intergroup correlation, despite an inconsistent nomenclature and the lack of standardized protocols for cell isolation and culture. Finally, based on flow analysis and reverse transcription polymerase chain reaction studies, our results suggest that hADAS cells do not express several proteins that are implicated as markers of "stemness" in other stem cell populations, including telomerase, CD133, and the membrane transporter ABCG2.
authors.affiliation: Department of Plastic and Reconstructive Surgery, University of Virginia, Charlottesville, VA 22908, USA. ajk2f@virginia.edu
authors.forename: Adam J
authors.initials: AJ
authors.lastname: Katz
authors.forename: Ashok
authors.initials: A
authors.lastname: Tholpady
authors.forename: Sunil S
authors.initials: SS
authors.lastname: Tholpady
authors.forename: Hulan
authors.initials: H
authors.lastname: Shang
authors.forename: Roy C
authors.initials: RC
authors.lastname: Ogle
mesh_terms: D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters / Q000235:genetics; D000273:Adipose Tissue / Q000737:chemistry / Q000166:cytology* / Q000378:metabolism; D000328:Adult; D000943:Antigens, Differentiation / Q000032:analysis; D000954:Antigens, Surface / Q000032:analysis*; D002454:Cell Differentiation / Q000502:physiology; D002478:Cells, Cultured; D005434:Flow Cytometry; D020869:Gene Expression Profiling; D006801:Humans; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000235:genetics; D020411:Oligonucleotide Array Sequence Analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017154:Stromal Cells / Q000737:chemistry / Q000166:cytology* / Q000378:metabolism; D019098:Telomerase / Q000235:genetics; D014158:Transcription, Genetic / Q000235:genetics
chemical_list: C116614:ABCG2 protein, human; D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters; D000943:Antigens, Differentiation; D000954:Antigens, Surface; D009363:Neoplasm Proteins; D019098:Telomerase