Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Inducible iPS Cells Support Full-term Development of Tetraploid BlastocystâComplemented Embryos

ABSTRACT: Differentiated somatic cells can be reprogrammed into induced pluripotent stem (iPS) cells by forced expression of four transcription factorsâOct4, Sox2, Klf4, and c-Myc. However, it remains undetermined whether the reprogrammed iPS cells are fully pluripotent, resembling normal embryonic stem (ES) cells, given that no iPS cell lines have been shown to possess the capability to autonomously generate full-term mice after injection into tetraploid blastocysts. Here, we provide evidence demonstrating that iPS cells induced by the four transcription factors can be fully pluripotent and that full-term mice can be produced from complemented tetraploid blastocysts. This work serves as a proof of principle that iPS cells can generate full term embryos by tetraploid complementation. We compared the gene expression profile of iPS cell, ES cell and MEF. ES cell and MEF served as control for iPS cell. Three biological repeats were included for each line.

ORGANISM(S): Mus musculus

SUBMITTER: Jianle Wang

PROVIDER: E-GEOD-17004 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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iPS cells can support full-term development of tetraploid blastocyst-complemented embryos.

Kang Lan L Wang Jianle J Zhang Yu Y Kou Zhaohui Z Gao Shaorong S

Cell stem cell 20090723 2

PMID: 19631602

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Project description:Ten-eleven translocation (TET) family enzymes can convert 5-methylcytosine (5mC) into 5-hydroxymethylcytosine (5hmC) in DNA and have been proposed as potential DNA demethylase candidates1. Evidences from recent studies indicated that Tet1 is predominantly expressed in ES cells and plays dual functions in promoting transcription of pluripotency genes and as well as participating in the repression of developmental genes by facilitating recruitment of PRC21-5. These studies further raised the possibility that Tet1 might play a role in somatic cell reprogramming. Here, we provide evidence showing that Tet1 can substitute for pluripotent transcription factors in reprogramming differentiated somatic cells to pluripotent stem cells. Tet1 can replace any one of the four traditional transcription factors including Oct4, Sox2, Klf4 and c-Myc during somatic cell reprogramming. Subsequently, the chimeric mice with germline transmission capacity could be efficiently produced from all induced pluripotent stem (iPS) cell lines reprogrammed by OT (Oct4, Tet1), TSKM (Tet1, Sox2, Klf4, c-Myc), OTK, OTKM and OSTM combinations. Furthermore, the TSKM-reprogrammed iPS cells without using Oct4 could produce viable full-term iPS mice with normal fertility through tetraploid complementation and secondary iPS cells could be induced subsequently from the somatic cells retrieved from the iPS mice. Moreover, we demonstrated that conversion of 5mC into 5hmC in Nanog promoter occurred during reprogramming, which might account in part for the mechanism of Tet1 mediated reprogramming. To our knowledge, our study provides the first evidence demonstrating that DNA modifying enzyme Tet1 can replace the pluripotent transcription factors to reprogram differentiated somatic cells to iPS cells. Gene expression profile of iPS cells and ES cells were generated by Affymetrix Mouse Gene 1.0 ST Array. The Gene expression profile of ES cell R1 was used as control. Three biological repeats were included for each line.

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Inducible iPS Cells Support Full-term Development of Tetraploid BlastocystâComplemented Embryos

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iPS cells can support full-term development of tetraploid blastocyst-complemented embryos.

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Inducible iPS Cells Support Full-term Development of Tetraploid BlastocystâComplemented Embryos