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. 2015 Aug 18;6(1):144.
doi: 10.1186/s13287-015-0137-7.

Mesenchymal stem cells derived from human induced pluripotent stem cells retain adequate osteogenicity and chondrogenicity but less adipogenicity

Affiliations

Mesenchymal stem cells derived from human induced pluripotent stem cells retain adequate osteogenicity and chondrogenicity but less adipogenicity

Ran Kang et al. Stem Cell Res Ther. .

Abstract

Introduction: Previously, we established a simple method for deriving mesenchymal stem cells (MSCs) from human induced pluripotent stem cells (iPSC-MSCs). These iPSC-MSCs were capable of forming osteogenic structures in scaffolds and nanofibers. The objective of this study is to systematically characterize the mesenchymal characteristics of the iPSC-MSCs by comparing them to bone marrow-derived MSCs (BM-MSCs).

Methods: Two iPSC-MSC lines (named as mRNA-iPSC-MSC-YL001 and lenti-iPSC-MSC-A001) and one BM-MSC line were used for the study. Cell proliferation, presence of mesenchymal surface markers, tri-lineage differentiation capability (osteogenesis, chondrogenesis, adipogenesis), and expression of "stemness" genes were analyzed in these MSC lines.

Results: The iPSC-MSCs were similar to BM-MSCs in terms of cell morphology (fibroblast-like) and surface antigen profile: CD29+, CD44+, CD73+, CD90+, CD105+, CD11b-, CD14-, CD31-, CD34-, CD45- and HLA-DR-. A faster proliferative capability was seen in both iPSC-MSCs lines compared to the BM-MSCs. The iPSC-MSCs showed adequate capacity of osteogenesis and chondrogenesis compared to the BM-MSCs, while less adipogenic potential was found in the iPSC-MSCs. The iPSC-MSCs and the tri-lineage differentiated cells (osteoblasts, chondrocytes, adipocytes) all lack expression of "stemness" genes: OCT4, SOX2, GDF3, CRIPTO, UTF1, DPPA4, DNMT3B, LIN28a, and SAL4.

Conclusions: The MSCs derived from human iPSCs with our method have advanced proliferation capability and adequate osteogenic and chondrogenic properties compared to BM-MSCs. However, the iPSC-MSCs were less efficient in their adipogenicity, suggesting that further modifications should be applied to our method to derive iPSC-MSCs more closely resembling the naïve BM-MSCs if necessary.

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Figures

Fig. 1
Fig. 1
Derivation of iPSC-MSCs from iPSCs produced by lentiviral-mediated programming of normal human dermal fibroblasts. a One lenti-iPSC line characterized by live cell imaging of TRA-1-60+ and CD44–; immunofluorescence staining of NANOG+ and OCT3/4+, and phase-contrast image of the iPSC clone used for MSC differentiation. b Cell cycle analysis of the lenti-iPSC clone. c Phase-contrast morphology of the BM-MSC, mRNA-iPSC-MSC-YL001 and the lenti-iPSC-MSC-A001 derived from the lenti-iPSCs. Magnification 200×. d A representative DAPI banded karyotype result for BM-MSC (P12), mRNA-iPSC-MSC-YL001 (P13) and the lenti-iPSC-MSC-A001 (P10). BM bone marrow, iPSC induced pluripotent stem cell, MSC mesenchymal stem cell, NHDF normal human dermal fibroblast
Fig. 2
Fig. 2
Flow cytometric analysis of mesenchymal markers CD11b–, CD14–, CD29+, CD31–, CD34–, CD44+, CD45–, CD73+, CD90+, CD105+, and HLA-DR– in BM-MSCs (P13), mRNA-iPSC-MSC-YL001 (P14), lenti-iPSC-MSC-A001 (P10). Unstained cells were used as flow cytometry control; 10,000 events were recorded for each sample. Bottom panel: percentage of cells positive for each marker is calculated by normalizing to the unstained cells. A minus value was replaced with “0”. BM bone marrow, iPSC induced pluripotent stem cell, MSC mesenchymal stem cell
Fig. 3
Fig. 3
Characterization of cell proliferation and growth. Analysis of the cell proliferation rate with a Click IT cell proliferation assay in a control cell line (K562, chronic myeloid leukemia-derived cell line), b lenti-iPSC-MSC-YL001 (P7), c mRNA-iPSC-MSC-A001 (P7) and d BM-MSCs (P8). Blue plots represents negative control without EdU incubation. Pink plots represents cells treated with EdU. e Cumulative population doubling assay of the BM-MSCs (P11), miPSC-MSC-YL001 (P11) and lenti-iPSC-MSC-A001 (P8) for a period of 2 weeks. BM bone marrow, iPSC induced pluripotent stem cell, MSC mesenchymal stem cell
Fig. 4
Fig. 4
Comparative analyses of the osteogenic capacity of the iPSC-MSCs and BM-MSCs. a Alizarin Red staining of calcium in the BM-MSCs, the mRNA-iPSC-MSC-YL001, and the lenti-iPSC-MSC-A001 with growth medium or osteogenic medium for 3 weeks. Images are representative of six repeats. In the left corner there is an image from one well of the 96-well plate. Scale bar for the microscopic images is 300 μm. b Quantitative calcium deposition of the BM-MSC, mRNA-iPSC-MSC-YL001, and lenti-iPSC-MSC-A001 cells after 3 weeks in the MSC growth medium or osteogenic medium (n = 8). c Quantitative PCR analysis of the expression of osteogenic genes RUNX2, ALP, COL1A1, and OC in the BM-MSC, mRNA-iPSC-MSC-YL001, lenti-iPSC-MSC-A001 after 3 weeks in the MSC growth medium or osteogenic medium (n = 6). *P < 0.05. BM bone marrow, iPSC induced pluripotent stem cell, MSC mesenchymal stem cell
Fig. 5
Fig. 5
Comparative analysis of the chondrogenic and adipogenic capacities. Toluidine blue staining of cartilaginous extracellular matrix of the BM-MSCs (a and d), the mRNA-iPSC-MSC-YL001 (b and e), and the lenti-iPSC-MSC-A001 (c and f) after 3 weeks in MSC growth medium (ac) or chondrogenic medium (df). Oil-Red O staining of lipids in the BM-MSCs (g and j), the mRNA-iPSC-MSC-YL001 (h and k), and the lenti-iPSC-MSC-A001 (i and l) after 3 weeks in MSC growth medium (gi) or adipogenic medium (jl). Arrow heads indicate the cartilaginous extracellular matrix (df) and lipids (jl). Scale bar: af, 150 μm; gl, 300 μm
Fig. 6
Fig. 6
Gene expression analysis of “stemness” genes in the NHDFs, iPSCs (two lines: mRNA-iPSC and lenti-iPSC), BM-MSCs, mRNA-iPSC-MSC-YL001, lenti-iPSC-MSC-A001 and the three derived lineages (osteogenic, chondrogenic, adipogenic). Expression of eleven stemness genes (POU class 5 homeobox 1 (OCT4/ POU5F1), Kruppel-like factor 4 (KLF4), v-myc avian myelocytomatosis viral oncogene homolog (C-MYC), SRY (sex determining region Y)-box 2 (SOX2), growth differentiation factor 3 (GDF3), teratocarcinoma-derived growth factor 1 (CRIPTO/ TDGF1), undifferentiated embryonic cell transcription factor 1 (UTF1), developmental pluripotency associated 4 (DPPA4), DNA (cytosine-5-)-methyltransferase 3 beta (DNMT3B), lin-28 homolog A (LIN28A) and spalt-like transcription factor 4 (SALL4)) was analyzed by PCR. a BM-MSCs in growth medium, and after 3 weeks in osteogenic, chondrogenic and adipogenic medium; b NHDF, mRNA-iPSCs, mRNA-iPSC-MSC-YL001 in growth medium, and mRNA-iPSC-MSC-YL001 after 3 weeks in osteogenic, chondrogenic and adipogenic medium; c NHDF, lenti-iPSCs, lenti-iPSC-MSC-A001 in growth medium, and lviPSC-MSC-A001 after 3 weeks in osteogenic, chondrogenic and adipogenic medium. BM bone marrow, iPSC induced pluripotent stem cell, MSC mesenchymal stem cell, NHDF normal human dermal fibroblast

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