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Bone marrow-derived mesenchymal stromal cells (BM-MSCs) in culture are derived from BM stromal cells or skeletal stem cells. Whereas MSCs have been exploited in clinical medicine, the identification of MSC-specific markers has been limited. Here, we report that a cell surface and secreted protein, Meflin, is expressed in cultured MSCs, fibroblasts and pericytes, but not other types of cells including epithelial, endothelial and smooth muscle cells. In vivo, Meflin is expressed by immature osteoblasts and chondroblasts. In addition, Meflin is found on stromal cells distributed throughout the BM, and on pericytes and perivascular cells in multiple organs. Meflin maintains the undifferentiated state of cultured MSCs and is downregulated upon their differentiation, consistent with the observation that Meflin-deficient mice exhibit increased number of osteoblasts and accelerated bone development. In the bone and BM, Meflin is more highly expressed in primitive stromal cells that express platelet-derived growth factor receptor α and Sca-1 than the Sca-1-negative adipo-osteogenic progenitors, which create a niche for hematopoiesis. Those results are consistent with a decrease in the number of clonogenic colony-forming unit-fibroblasts within the BM of Meflin-deficient mice. These preliminary data suggest that Meflin is a potential marker for cultured MSCs and their source cells in vivo.
Pubmed ID: 26924503
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Embryonic stem cell distribution unit that distributes material arising within European Conditional Mouse Mutagenesis Program consortium, currently targeting vectors and ES cells. Upon user request EUCOMM grow targeting vectors from glycerol stocks and prepare vector DNA. Identity of vector is verified by restriction mapping. Upon user request EUCOMM thaw, expand and re-freeze several aliquots of desired ES cell clone. Standard controls include PCR based assay. Upon additional request EuMMCR unit develops genotyping PCR, which can be used to genotype chimeric mice that may be generated using those ES cell clones.
View all literature mentionsCenter that produces knockout mice and carries out high-throughput phenotyping of each line in order to determine function of every gene in mouse genome. These mice will be preserved in repositories and made available to scientific community representing valuable resource for basic scientific research as well as generating new models for human diseases.
View all literature mentionsMus musculus with name C57BL/6J from IMSR.
View all literature mentionsCell line NIH 3T3 is a Spontaneously immortalized cell line with a species of origin Mus musculus
View all literature mentionsCell line 3T3-L1 is a Spontaneously immortalized cell line with a species of origin Mus musculus (Mouse)
View all literature mentionslaboratory mouse with name C57BL/6N from MGI.
View all literature mentionsCell line COS-7 is a Transformed cell line with a species of origin Chlorocebus aethiops (Green monkey)
View all literature mentionsCell line C3H/10T1/2 clone 8 is a Spontaneously immortalized cell line with a species of origin Mus musculus
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