मानव परिधीय रक्त से प्रेरित pluripotent स्टेम सेल का प्रयोग STEMCCA lentiviral वेक्टर पीढ़ी
Summary
यहाँ हम एक एकल lentiviral reprogramming वेक्टर का उपयोग परिधीय रक्त के 3-4 मिलीग्राम से मानव iPSCs पीढ़ी के लिए एक सरल और प्रभावी प्रोटोकॉल दिखाते हैं. आसानी से उपलब्ध रक्त कोशिकाओं की Reprogramming यह एक व्यापक अनुसंधान समुदाय के लिए सुलभ बनाने के द्वारा iPSC प्रौद्योगिकी के उपयोग में तेजी लाने का वादा किया है.
Abstract
Through the ectopic expression of four transcription factors, Oct4, Klf4, Sox2 and cMyc, human somatic cells can be converted to a pluripotent state, generating so-called induced pluripotent stem cells (iPSCs)1-4. Patient-specific iPSCs lack the ethical concerns that surround embryonic stem cells (ESCs) and would bypass possible immune rejection. Thus, iPSCs have attracted considerable attention for disease modeling studies, the screening of pharmacological compounds, and regenerative therapies5.
We have shown the generation of transgene-free human iPSCs from patients with different lung diseases using a single excisable polycistronic lentiviral Stem Cell Cassette (STEMCCA) encoding the Yamanaka factors6. These iPSC lines were generated from skin fibroblasts, the most common cell type used for reprogramming. Normally, obtaining fibroblasts requires a skin punch biopsy followed by expansion of the cells in culture for a few passages. Importantly, a number of groups have reported the reprogramming of human peripheral blood cells into iPSCs7-9. In one study, a Tet inducible version of the STEMCCA vector was employed9, which required the blood cells to be simultaneously infected with a constitutively active lentivirus encoding the reverse tetracycline transactivator. In contrast to fibroblasts, peripheral blood cells can be collected via minimally invasive procedures, greatly reducing the discomfort and distress of the patient. A simple and effective protocol for reprogramming blood cells using a constitutive single excisable vector may accelerate the application of iPSC technology by making it accessible to a broader research community. Furthermore, reprogramming of peripheral blood cells allows for the generation of iPSCs from individuals in which skin biopsies should be avoided (i.e. aberrant scarring) or due to pre-existing disease conditions preventing access to punch biopsies.
Here we demonstrate a protocol for the generation of human iPSCs from peripheral blood mononuclear cells (PBMCs) using a single floxed-excisable lentiviral vector constitutively expressing the 4 factors. Freshly collected or thawed PBMCs are expanded for 9 days as described10,11 in medium containing ascorbic acid, SCF, IGF-1, IL-3 and EPO before being transduced with the STEMCCA lentivirus. Cells are then plated onto MEFs and ESC-like colonies can be visualized two weeks after infection. Finally, selected clones are expanded and tested for the expression of the pluripotency markers SSEA-4, Tra-1-60 and Tra-1-81. This protocol is simple, robust and highly consistent, providing a reliable methodology for the generation of human iPSCs from readily accessible 4 ml of blood.
Protocol
Representative Results
Discussion
हम यहाँ STEMCCA lentiviral वेक्टर का उपयोग करने के लिए हौसले से एकत्र परिधीय रक्त के कुछ मिलीलीटर से अलग mononuclear कोशिकाओं से मानव iPSCs उत्पन्न का वर्णन करता है. प्रोटोकॉल भी जमी PBMCs (buffy कोट से सीधे प्राप्त), महत्वपूर्ण व्या…
Divulgazioni
The authors have nothing to disclose.
Acknowledgements
इन अध्ययनों के हिस्से में NIH UO1HL107443-01 जीजेएम और जीएम के लिए पुरस्कार द्वारा वित्त पोषित किया गया.
Materials
| Name of the reagent | Company | Catalogue number | Comments (optional) |
| BD Vacutainer CPT Cell Preparation Tube with sodium citrate | BD Biosciences | 362760 | |
| QBSF-60 Stem Cell Medium | Quality Biological | 160-204-101 | |
| IMDM | Invitrogen | 12440 | |
| DMEM/F12 | Invitrogen | 11330 | |
| FBS | Atlanta Biologicals | S10250 | |
| Knockout Serum Replacement | Invitrogen | 10828 | |
| Primocin | Invivogen | ant-pm-2 | |
| Pen/Strep | Invitrogen | 15140 | |
| L-Glutamine | Invitrogen | 25030 | |
| Non-Essential Amino Acids | Invitrogen | 11140 | |
| β-mercaptoethanol | MP Biomedicals | 190242 | |
| Ascorbic Acid | Sigma | A4544 | |
| IGF-1 | R&D Systems | 291-G1 | |
| IL-3 | R&D Systems | 203-IL | |
| SCF | R&D Systems | 255-SC | |
| EPO | R&D Systems | 286-EP | |
| Dexamethasone | Sigma | D4902 | |
| Polybrene | Sigma | H-9268 | |
| bFGF | R&D Systems | 233-FB | |
| Stemolecule Y27632 | Stemgent | 04-0012 | |
| ES Cell Marker Sample Kit | Millipore | SCR002 |
Riferimenti
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- Somers, A., Jean, J. C., Sommer, C. A., et al. Generation of transgene-free lung disease-specific human induced pluripotent stem cells using a single excisable lentiviral stem cell cassette. Stem Cells. 28, 1728-1740 (2010).
- Loh, Y. H., Hartung, O., Li, H., et al. Reprogramming of T cells from human peripheral blood. Cell Stem Cell. 7, 15-19 (2010).
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- Chou, B. K., Mali, P., Huang, X., et al. Efficient human iPS cell derivation by a non-integrating plasmid from blood cells with unique epigenetic and gene expression signatures. Cell Res. 21, 518-529 (2011).
- vanden Akker, E., Satchwell, T. J., Pellegrin, S., Daniels, G., Toye, A. M. The majority of the in vitro erythroid expansion potential resides in CD34(-) cells, outweighing the contribution of CD34(+) cells and significantly increasing the erythroblast yield from peripheral blood samples. Haematologica. 95, 1594-1598 (2010).
