Unique molecular events during reprogramming of human somatic cells to induced pluripotent stem cells (iPSCs) at naïve state

Abstract

Derivation of human naïve cells in the ground state of pluripotency provides promising avenues for developmental biology studies and therapeutic manipulations. However, the molecular mechanisms involved in the establishment and maintenance of human naïve pluripotency remain poorly understood. Using the human inducible reprogramming system together with the 5iLAF naïve induction strategy, integrative analysis of transcriptional and epigenetic dynamics across the transition from human fibroblasts to naïve iPSCs revealed ordered waves of gene network activation sharing signatures with those found during embryonic development from late embryogenesis to pre-implantation stages. More importantly, Transcriptional analysis showed a significant transient reactivation of transcripts with 8-cell-stage-like characteristics in the late stage of reprogramming, suggesting transient activation of gene network with human zygotic genome activation (ZGA)-like signatures during the establishment of naïve pluripotency. Together, Dissecting the naïve reprogramming dynamics by integrative analysis improves the understanding of the molecular features involved in the generation of naïve pluripotency directly from somatic cells.

Data availability

The following data sets were generated
The following previously published data sets were used
    1. Guo H
    2. Zhu P
    3. Yan L
    4. Qiao J
    5. Tang F
    (2014) The DNA methylation landscape of human early embryos
    Publicly available at the NCBI Gene Expression Omnibus (accession no: GSE49828).

Article and author information

Author details

  1. Yixuan Wang

    School of Life Sciences and Technology, Tongji University, Shanghai, China
    For correspondence
    wangyixuan@tongji.edu.cn
    Competing interests
    The authors declare that no competing interests exist.
  2. Chengchen Zhao

    School of Life Sciences and Technology, Tongji University, Shanghai, China
    Competing interests
    The authors declare that no competing interests exist.
  3. Zhenzhen Hou

    School of Life Sciences and Technology, Tongji University, Shanghai, China
    Competing interests
    The authors declare that no competing interests exist.
  4. Yuanyuan Yang

    School of Life Sciences and Technology, Tongji University, Shanghai, China
    Competing interests
    The authors declare that no competing interests exist.
  5. Yan Bi

    School of Life Sciences and Technology, Tongji University, Shanghai, China
    Competing interests
    The authors declare that no competing interests exist.
  6. Hong Wang

    School of Life Sciences and Technology, Tongji University, Shanghai, China
    Competing interests
    The authors declare that no competing interests exist.
  7. Yong Zhang

    School of Life Sciences and Technology, Tongji University, Shanghai, China
    Competing interests
    The authors declare that no competing interests exist.
  8. Shaorong Gao

    School of Life Sciences and Technology, Tongji University, Shanghai, China
    For correspondence
    gaoshaorong@tongji.edu.cn
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0003-1041-3928

Funding

National Natural Science Foundation of China (31671530)

  • Shaorong Gao

Ministry of Science and Technology of the People's Republic of China (2016YFA0100400)

  • Shaorong Gao

National Natural Science Foundation of China (31325019)

  • Shaorong Gao

National Natural Science Foundation of China (31471392)

  • Shaorong Gao

Ministry of Science and Technology of the People's Republic of China (2014CB964601)

  • Shaorong Gao

The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.

Ethics

Human subjects: Human subjects: Human skin specimens from abortive fetus were obtained from the Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Tongji University to make human embryonic fibroblasts (HEFs). The patients provided informed consent for tissue donations, and the Biological Research Ethics Committee of Tongji University approved the study.

Copyright

© 2018, Wang et al.

This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.

Metrics

  • 3,653
    views
  • 693
    downloads
  • 36
    citations

Views, downloads and citations are aggregated across all versions of this paper published by eLife.

Download links

A two-part list of links to download the article, or parts of the article, in various formats.

Downloads (link to download the article as PDF)

Open citations (links to open the citations from this article in various online reference manager services)

Cite this article (links to download the citations from this article in formats compatible with various reference manager tools)

  1. Yixuan Wang
  2. Chengchen Zhao
  3. Zhenzhen Hou
  4. Yuanyuan Yang
  5. Yan Bi
  6. Hong Wang
  7. Yong Zhang
  8. Shaorong Gao
(2018)
Unique molecular events during reprogramming of human somatic cells to induced pluripotent stem cells (iPSCs) at naïve state
eLife 7:e29518.
https://doi.org/10.7554/eLife.29518

Share this article

https://doi.org/10.7554/eLife.29518

Further reading

    1. Stem Cells and Regenerative Medicine
    Jens Schuster, Xi Lu ... Xingqi Chen
    Research Article

    Dravet syndrome (DS) is a devastating early-onset refractory epilepsy syndrome caused by variants in the SCN1A gene. A disturbed GABAergic interneuron function is implicated in the progression to DS but the underlying developmental and pathophysiological mechanisms remain elusive, in particularly at the chromatin level. Induced pluripotent stem cells (iPSCs) derived from DS cases and healthy donors were used to model disease-associated epigenetic abnormalities of GABAergic development. Chromatin accessibility was assessed at multiple time points (Day 0, Day 19, Day 35, and Day 65) of GABAergic differentiation. Additionally, the effects of the commonly used anti-seizure drug valproic acid (VPA) on chromatin accessibility were elucidated in GABAergic cells. The distinct dynamics in the chromatin profile of DS iPSC predicted accelerated early GABAergic development, evident at D19, and diverged further from the pattern in control iPSC with continued differentiation, indicating a disrupted GABAergic maturation. Exposure to VPA at D65 reshaped the chromatin landscape at a variable extent in different iPSC-lines and rescued the observed dysfunctional development of some DS iPSC-GABA. The comprehensive investigation on the chromatin landscape of GABAergic differentiation in DS-patient iPSC offers valuable insights into the epigenetic dysregulations associated with interneuronal dysfunction in DS. Moreover, the detailed analysis of the chromatin changes induced by VPA in iPSC-GABA holds the potential to improve the development of personalized and targeted anti-epileptic therapies.

    1. Neuroscience
    2. Stem Cells and Regenerative Medicine
    Amber R Philp, Carolina R Reyes ... Francisco J Rivera
    Short Report

    Revealing unknown cues that regulate oligodendrocyte progenitor cell (OPC) function in remyelination is important to optimise the development of regenerative therapies for multiple sclerosis (MS). Platelets are present in chronic non-remyelinated lesions of MS and an increase in circulating platelets has been described in experimental autoimmune encephalomyelitis (EAE) mice, an animal model for MS. However, the contribution of platelets to remyelination remains unexplored. Here we show platelet aggregation in proximity to OPCs in areas of experimental demyelination. Partial depletion of circulating platelets impaired OPC differentiation and remyelination, without altering blood-brain barrier stability and neuroinflammation. Transient exposure to platelets enhanced OPC differentiation in vitro, whereas sustained exposure suppressed this effect. In a mouse model of thrombocytosis (Calr+/-), there was a sustained increase in platelet aggregation together with a reduction of newly-generated oligodendrocytes following toxin-induced demyelination. These findings reveal a complex bimodal contribution of platelet to remyelination and provide insights into remyelination failure in MS.