alexa Faster generation of hiPSCs by coupling high-titer lentivirus and column-based positive selection.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Stem Cell Research & Therapy

Author(s): Dick E, Matsa E, Young LE, Darling D, Denning C

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Abstract The protocols described here address methods used in two crucial stages in the retroviral reprogramming of somatic cells to produce human induced pluripotent stem cell (hiPSC) lines. The first is an optimized method for producing lentivirus at an efficiency 600-fold greater than previously published, and it includes conjugation of the lentivirus to streptavidin superparamagnetic particles; this process takes 8 d. The second method enables the isolation of true hiPSCs immediately after somatic cell reprogramming and involves column-based positive selection of cells expressing the pluripotency marker TRA-1-81. This process takes 2 h and, as it is directly compatible with feeder-free culture, the time burden of manually identifying and mechanically propagating hiPSC colonies is reduced drastically. Taken together, these methods accelerate the production of hiPSCs and enable lines to be isolated, expanded to approxiamtely 10⁷ cells and cryopreserved within 6-8 weeks. This article was published in Nat Protoc and referenced in Journal of Stem Cell Research & Therapy

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