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Membrane proteomic analysis of human mesenchymal stromal cells during adipogenesis
Author(s) -
Jeong Ju Ah,
Ko KyungMin,
Park Hyung Soon,
Lee Jinsook,
Jang Cholsoon,
Jeon ChoonJu,
Koh Gou Young,
Kim Hoeon
Publication year - 2007
Publication title -
proteomics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.26
H-Index - 167
eISSN - 1615-9861
pISSN - 1615-9853
DOI - 10.1002/pmic.200700502
Subject(s) - mesenchymal stem cell , adipogenesis , membrane protein , proteome , microvesicles , microbiology and biotechnology , cell , chemistry , proteomics , cell membrane , biology , membrane , biochemistry , gene , microrna
Mesenchymal stromal cells (MSCs) have proven useful for cell and immune therapy, but the molecular constituents responsible for their functionalities, in particular, those on the plasma membrane, remain largely unknown. Here we employed both gel and nongel based MS to analyze human MSCs' membrane proteome before and after adipogenesis. 2‐DE of cells that were pretreated with membrane impermeable fluorescent dyes revealed that both the whole cell proteome and the cell surface subproteome were independent of donors. LC coupled with tandem MS analysis of the plasma membrane‐containing fraction allowed us to identify 707 proteins, approximately half of which could be annotated as membrane‐related proteins. Of particular interest was a subset of ectodomain‐containing membrane‐bound proteins that encompass most known surface markers for MSCs, but also contain a multitude of solute carriers and ATPases. Upon adipogenic differentiation, this proteomic profile was amended to include several proteins involved in lipid metabolism and trafficking, at the expense of, most noticeably, ectoenzymes. Our results here provide not only a basis for future studies of MSC‐specific molecular mechanisms, but also a molecular inventory for the development of antibody‐based cell isolation and identification procedures.