Поколение человека индуцированных плюрипотентных стволовых клеток из периферической крови с помощью STEMCCA Lentiviral векторного
Summary
Здесь мы покажем простой и эффективный протокол для генерации ИПСК человека с 3-4 мл периферической крови с помощью одной лентивирусов вектор перепрограммирования. Перепрограммирование доступны клеток крови обещает ускорить использование ИПСК технологий, сделав их доступными для более широкого научного сообщества.
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
Мы здесь описывать использование вектора STEMCCA лентивирусов для получения ИПСК человека из мононуклеарных клеток, выделенных из нескольких миллилитров свежесобранных периферической крови. Протокол также может быть использован для перепрограммирования замороженные РВМС (полученные …
Disclosures
The authors have nothing to disclose.
Acknowledgements
Эти исследования были частично финансируется за счет NIH UO1HL107443-01 Награда GJM и GM.
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 |
References
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