In vitro reprogramming of fibroblasts into a pluripotent ES-cell-like state

Marius Wernig, Alexander Meissner, Ruth Foreman, Tobias Brambrink, Manching Ku, Konrad Hochedlinger, Bradley E. Bernstein and Rudolf Jaenisch ()
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Marius Wernig: Whitehead Institute for Biomedical Research and,
Alexander Meissner: Whitehead Institute for Biomedical Research and,
Ruth Foreman: Whitehead Institute for Biomedical Research and,
Tobias Brambrink: Whitehead Institute for Biomedical Research and,
Manching Ku: Molecular Pathology Unit and Center for Cancer Research, Massachusetts General Hospital, Charlestown, Massachusetts 02129, USA
Konrad Hochedlinger: Whitehead Institute for Biomedical Research and,
Bradley E. Bernstein: Molecular Pathology Unit and Center for Cancer Research, Massachusetts General Hospital, Charlestown, Massachusetts 02129, USA
Rudolf Jaenisch: Whitehead Institute for Biomedical Research and,

Nature, 2007, vol. 448, issue 7151, 318-324

Abstract: Abstract Nuclear transplantation can reprogramme a somatic genome back into an embryonic epigenetic state, and the reprogrammed nucleus can create a cloned animal or produce pluripotent embryonic stem cells. One potential use of the nuclear cloning approach is the derivation of ‘customized’ embryonic stem (ES) cells for patient-specific cell treatment, but technical and ethical considerations impede the therapeutic application of this technology. Reprogramming of fibroblasts to a pluripotent state can be induced in vitro through ectopic expression of the four transcription factors Oct4 (also called Oct3/4 or Pou5f1), Sox2, c-Myc and Klf4. Here we show that DNA methylation, gene expression and chromatin state of such induced reprogrammed stem cells are similar to those of ES cells. Notably, the cells—derived from mouse fibroblasts—can form viable chimaeras, can contribute to the germ line and can generate live late-term embryos when injected into tetraploid blastocysts. Our results show that the biological potency and epigenetic state of in-vitro-reprogrammed induced pluripotent stem cells are indistinguishable from those of ES cells.

Date: 2007
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DOI: 10.1038/nature05944

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