6533b852fe1ef96bd12ab32c
RESEARCH PRODUCT
Dppa3 expression is critical for generation of fully reprogrammed iPS cells and maintenance of Dlk1-Dio3 imprinting.
Xu XingboSmorag LukaszNakamura ToshinobuKimura TohruDressel RalfFitzner AntjeTan XiaoyingLinke MatthiasZechner UlrichEngel WolfgangPantakani D V Krishnasubject
MaleChromosomal Proteins Non-HistoneGreen Fluorescent ProteinsInduced Pluripotent Stem CellsMice TransgenicAscorbic AcidIodide PeroxidaseArticleGenomic ImprintingMiceAnimalsCrosses GeneticMice KnockoutGene Expression ProfilingCalcium-Binding ProteinsDNA MethylationFibroblastsMice Inbred C57BLRepressor ProteinsKineticsGerm CellsRetroviridaeGene Expression RegulationIntercellular Signaling Peptides and ProteinsFemaleProtein Bindingdescription
Reprogramming of mouse somatic cells into induced pluripotent stem cells (iPSCs) often generates partially reprogrammed iPSCs (pre-iPSCs), low-grade chimera forming iPSCs (lg-iPSCs) and fully reprogrammed, high-grade chimera production competent iPSCs (hg-iPSCs). Lg-iPSC transcriptome analysis revealed misregulated Dlk1-Dio3 cluster gene expression and subsequently the imprinting defect at the Dlk1-Dio3 locus. Here, we show that germ-cell marker Dppa3 is present only in lg-iPSCs and hg-iPSCs, and that induction with exogenous Dppa3 enhances reprogramming kinetics, generating all hg-iPSCs, similar to vitamin C (Vc). Conversely, Dppa3-null fibroblasts show reprogramming block at pre-iPSCs state and Dlk1-Dio3 imprinting defect. At the molecular level, we show that Dppa3 is associated with Dlk1-Dio3 locus and identify that Dppa3 maintains imprinting by antagonizing Dnmt3a binding. Our results further show molecular parallels between Dppa3 and Vc in Dlk1-Dio3 imprinting maintenance and suggest that early activation of Dppa3 is one of the cascades through which Vc facilitates the generation of fully reprogrammed iPSCs.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-07-30 | Nature communications |