Proteomics

Dataset Information

25

Secretome analysis of human bone marrow derived mesenchymal stromal cells


ABSTRACT: As an essential cellular component of the bone marrow (BM) microenvironment mesenchymal stromal cells (MSC) play a pivotal role for the physiological regulation of hematopoiesis, in particular through the secretion of cytokines and chemokines. Mass spectrometry (MS) facilitates the identification and quantification of a large amount of secreted proteins (secretome), but can be hampered by the false-positive identification of contaminating proteins released from dead cells or derived from cell medium. To reduce the likelihood of contaminations we applied an approach combining secretome and proteome analysis to characterize the physiological secretome of BM derived human MSC. Our analysis revealed a secretome consisting of 315 proteins. Pathway analyses of these proteins revealed a high abundance of proteins related to cell growth and/or maintenance, signal transduction and cell communication thereby representing key biological functions of BM derived MSC on protein level. Within the MSC secretome we identified several cytokines and growth factors such as VEGFC, TGF-β1, TGF-β2 and GDF6 which are known to be involved in the physiological regulation of hematopoiesis. By comparing the peptide patterns of secretomes and cell lysates 17 proteins were identified as candidates for proteolytic processing. Taken together, our combined MS work-flow reduced the likelihood of contaminations and enabled us to carve out a specific overview about the composition of the secretome from human BM derived MSC. This methodological approach and the specific secretome signature of BM derived MSC may serve as basis foffuture comparative analyses of the interplay of MSC and HSPC in patients with hematological malignancies.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Homo sapiens  

TISSUE(S): Bone Marrow

DISEASE(S): Not Available

SUBMITTER: Falk Baberg  

LAB HEAD: Prof. Kai Stühler

PROVIDER: PXD011643 | Pride | 2019-02-12

REPOSITORIES: Pride

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Publications

Secretome analysis of human bone marrow derived mesenchymal stromal cells.

Baberg Falk F   Geyh Stefanie S   Waldera-Lupa Daniel D   Stefanski Anja A   Zilkens Christoph C   Haas Rainer R   Schroeder Thomas T   Stühler Kai K  

Biochimica et biophysica acta. Proteins and proteomics 20190201 4


As an essential cellular component of the bone marrow (BM) microenvironment mesenchymal stromal cells (MSC) play a pivotal role for the physiological regulation of hematopoiesis, in particular through the secretion of cytokines and chemokines. Mass spectrometry (MS) facilitates the identification and quantification of a large amount of secreted proteins (secretome), but can be hampered by the false-positive identification of contaminating proteins released from dead cells or derived from cell me  ...[more]

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