Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Intrinsic differentiation potential of human postnatal MSC, Mab and MAPC reflected in their transcriptome

ABSTRACT: We have employed whole genome microarray expression profiling to identify genes that characterize different populations of human postnatal stem cells and reflect their potency MSC, Mab and MAPC cultures were established from at least three different donors and their transcriptome was assayed using the Agilent 4x44k whole human genome microarray; furthermore, the H9 ESC line from U of Wisconsin and MSC from Lonza were added for comparison MSC = Mesenchymal Stem Cells, MAPC= Multipotent Adult Progenitor Cells, Mab= Mesoangioblasts, ESC= Embryonic Stem Cells

ORGANISM(S): Homo sapiens

SUBMITTER: Valerie Roobrouck

PROVIDER: E-GEOD-23131 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Differentiation potential of human postnatal mesenchymal stem cells, mesoangioblasts, and multipotent adult progenitor cells reflected in their transcriptome and partially influenced by the culture conditions.

Roobrouck Valerie D VD Clavel Carlos C Jacobs Sandra A SA Ulloa-Montoya Fernando F Crippa Stefania S Sohni Abhishek A Roberts Scott J SJ Luyten Frank P FP Van Gool Stefaan W SW Sampaolesi Maurilio M Delforge Michel M Luttun Aernout A Verfaillie Catherine M CM

Stem cells (Dayton, Ohio) 20110501 5

Several adherent postnatal stem cells have been described with different phenotypic and functional properties. As many of these cells are being considered for clinical therapies, it is of great importance that the identity and potency of these products is validated. We compared the phenotype and functional characteristics of human mesenchymal stem cells (hMSCs), human mesoangioblasts (hMab), and human multipotent adult progenitor cells (hMAPCs) using uniform standardized methods. Human MAPCs cou ...[more]

PMID: 21433224

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Project description:Primary cortical neurons were isolated from E15 mice and after 5 days in vitro were untreated or treated for 24 h with mesenchymal stem cell conditioned medium and then untreated or treated for a further 24 h with NMDA. Neuron gene expression was profiled and compared between the four different conditions (neurons, neurons+MSC cm, neurons+NMDA, neurons+MSC cm+NMDA) to investigate the molecular mechanisms of MSC neuroprotection. Mesenchymal stem cells (MSC) promote functional recovery in experimental models of central nervous system (CNS) pathology and are currently being tested in clinical trials for stroke, multiple sclerosis and CNS injury. Their beneficial effects are attributed to activation of endogenous CNS repair processes and immune regulation but their mechanisms of action are poorly understood. Here we investigated the neuroprotective effects of MSC in simplified MSC-neuron co-culture systems and in mice using models of glutamate excitotoxicity. MSC protected primary cortical neurons against glutamate (NMDA) receptor-induced death and conditioned medium from MSC (MSC cm), but not control NIH3T3 cells, was sufficient for this effect. MSC cm neuroprotection in mouse cortical neurons was reduced by neutralizing antibodies to bFGF and associated with altered gene expression in neurons towards an immature phenotype as well as reduced neuronal Grin1, Grin2a and Grin2b mRNA levels in response to NMDA stimulation. Further, MSC cm neuroprotection in rat retinal ganglion cells was associated with absence of glutamate-induced calcium influx. Adoptive transfer of EGFP+MSC in a mouse kainic acid seizure model reduced CA3 neuron damage and hippocampal astrocytosis and resulted in the increased expression of neuronal genes that are upregulated by MSC cm, Bmi1, Ddx4, Ezh1, in the hippocampus. These results show that MSC mediate direct neuroprotection against glutamate excitotoxicity by secreting bFGF, reducing glutamate receptor expression and function and altering neuron gene expression towards an immature pattern, and provide evidence for a link between the therapeutic effects of MSC and the activation of endogenous repair processes following CNS injury. In vitro cultures primary cortical neurons from mice were protected from glutamate excitotoxicity when pre-treated with MSC cm. Global gene expression changes induced in neurons before and after treatment with MSC cm and/or NMDA were investigated using a cDNA spotted macroarray filter. Four samples were analysed in duplicate: neurons alone (untreated), neurons+MSC cm, neurons+NMDA, neurons+MSC cm+NMDA.

Dataset Information

Intrinsic differentiation potential of human postnatal MSC, Mab and MAPC reflected in their transcriptome

Publications

Differentiation potential of human postnatal mesenchymal stem cells, mesoangioblasts, and multipotent adult progenitor cells reflected in their transcriptome and partially influenced by the culture conditions.

Similar Datasets

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