title: Generation of human-induced pluripotent stem cells from gut mesentery-derived cells by ectopic expression of OCT4/SOX2/NANOG.
abstract: Induced pluripotent stem (iPS) cells have been generated from human somatic cells by ectopic expression of defined transcription factors. Application of this approach in human cells may have enormous potential to generate patient-specific pluripotent stem cells. However, traditional methods of reprogramming in human somatic cells involve the use of oncogenes c-MYC and KLF4, which are not applicable to clinical translation. In the present study, we investigated whether human fetal gut mesentery-derived cells (hGMDCs) could be successfully reprogrammed into induced pluripotent stem (iPS) cells by OCT4, SOX2, and NANOG alone. We used lentiviruses to express OCT4, SOX2, NANOG, in hGMDCs, then generated iPS cells that were identified by morphology, presence of pluripotency markers, global gene expression profile, DNA methylation status, capacity to form embryoid bodies (EBs), and terotoma formation. iPS cells resulting from hGMDCs were similar to human embryonic stem (ES) cells in morphology, proliferation, surface markers, gene expression, and epigenetic status of pluripotent cell-specific genes. Furthermore, these cells were able to differentiate into cell types of all three germ layers both in vitro and in vivo, as shown by EB and teratoma formation assays. DNA fingerprinting showed that the human iPS cells were derived from the donor cells, and are not a result of contamination. Our results provide proof that hGMDCs can be reprogrammed into pluripotent cells by ectopic expression of three factors (OCT4, SOX2, and NANOG) without the use of oncogenes c-MYC and KLF4.
authors.affiliation: Peking University Stem Cell Research Center, Beijing, People's Republic of China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.forename: Hongxi
authors.initials: H
authors.lastname: Zhao
authors.forename: Feng
authors.initials: F
authors.lastname: Lan
authors.forename: Andrew
authors.initials: A
authors.lastname: Lee
authors.forename: Liu
authors.initials: L
authors.lastname: Chen
authors.forename: Changsheng
authors.initials: C
authors.lastname: Lin
authors.forename: Yuanqing
authors.initials: Y
authors.lastname: Yao
authors.forename: Lingsong
authors.initials: L
authors.lastname: Li
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002460:Cell Line; D005434:Flow Cytometry; D018398:Homeodomain Proteins / Q000235:genetics*; D006801:Humans; D007621:Karyotyping; D000090062:Kruppel-Like Factor 4; D008643:Mesentery / Q000166:cytology*; D051379:Mice; D016513:Mice, SCID; D000071317:Nanog Homeobox Protein; D050814:Octamer Transcription Factor-3 / Q000235:genetics*; D020411:Oligonucleotide Array Sequence Analysis; D039904:Pluripotent Stem Cells / Q000166:cytology*; D011401:Promoter Regions, Genetic; D020133:Reverse Transcriptase Polymerase Chain Reaction; D055748:SOXB1 Transcription Factors / Q000235:genetics*
chemical_list: D018398:Homeodomain Proteins; C000715467:KLF4 protein, human; C000715468:Klf4 protein, mouse; D000090062:Kruppel-Like Factor 4; C486780:NANOG protein, human; D000071317:Nanog Homeobox Protein; D050814:Octamer Transcription Factor-3; C494173:POU5F1 protein, human; C527782:SOX2 protein, human; D055748:SOXB1 Transcription Factors