title: Identification of a membrane proteomic signature for human embryonic stem cells independent of culture conditions.
abstract: Proteomic profiling of human embryonic stem cells (hESC) can identify cell fate determination and self-renewal biomarkers. Employing Fourier transform LC-ESI-MS/MS and MS(3) mass spectrometry, we obtained a membrane proteomic signature overlapping between hESC cultured on mouse embryonic fibroblast (MEF) feeders and those grown under MEF-free culture conditions. We identified 444 transmembrane or membrane-associated proteins, of which 157 were common between both culture conditions. Functional annotation revealed CD antigens (10%), adhesion proteins (4%), proliferation-associated proteins (4%), receptors (41%), transport proteins (21%), structural proteins (5%), and proteins with miscellaneous functions (15%). In addition, 15 CD antigens and a number of surface marker molecules not previously observed in hESC at a proteome level, e.g., Nodal modulator 1, CD222, transgelin-2, and CD81, were identified. In conclusion, we describe the first membrane proteome profile of hESC that is independent of culture conditions. These data can be used to define the phenotype of hESC.
authors.affiliation: Department of Endocrinology and Metabolism, Medical Biotechnology Center, University of Southern Denmark, Odense C, Denmark.
authors.forename: Linda
authors.initials: L
authors.lastname: Harkness
authors.forename: Helle
authors.initials: H
authors.lastname: Christiansen
authors.forename: Jan
authors.initials: J
authors.lastname: Nehlin
authors.forename: Torben
authors.initials: T
authors.lastname: Barington
authors.forename: Jens S
authors.initials: JS
authors.lastname: Andersen
authors.forename: Moustapha
authors.initials: M
authors.lastname: Kassem
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000032:analysis; D018929:Cell Culture Techniques; D018920:Coculture Techniques; D053595:Embryonic Stem Cells / Q000166:cytology*; D005347:Fibroblasts / Q000166:cytology; D006801:Humans; D013058:Mass Spectrometry / Q000379:methods; D008565:Membrane Proteins / Q000032:analysis*; D051379:Mice; D040901:Proteomics / Q000379:methods*
chemical_list: D015415:Biomarkers; D008565:Membrane Proteins