Evidence map›Paper›PMID 34936886›Full record

ArticleCell stem cell2022

Human embryonic genome activation initiates at the one-cell stage.

Maki Asami, Brian Y H Lam, Marcella K Ma, Kara Rainbow, Stefanie Braun, Matthew D VerMilyea, Giles S H Yeo, Anthony C F Perry

Open access · hybridAbstract read
In one paragraph

Article in Cell stem cell, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 89 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
89citing papers in PubMed, 1 pooled it
8.0field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

89 citing papers in PubMed, 1 synthesis or guideline pooled it, 128 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Emerging roles of mJournal of assisted reproduction and genetics · 2026
    Review
  4. Review
  5. Review
  6. Article
  7. Species-specific roles of SP1 in bovine and human embryonic genome activation and early embryonic development.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  8. Article
  9. Article
  10. Article
  11. Clocks and Dominoes: Timing Mechanisms of Embryogenesis.bioRxiv : the preprint server for biology · 2026
    Article
  12. Article
  13. Single-Cell and Single-Embryo RNA Sequencing.Methods in molecular biology (Clifton, N.J.) · 2026
    Article
  14. Review
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Review

29 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 3 institutions in 2 countries.

Maki AsamiLaboratory of Mammalian Molecular Embryology, Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, England.
Brian Y H LamMRC Metabolic Diseases Unit, Wellcome-MRC Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, England.
Marcella K MaMRC Metabolic Diseases Unit, Wellcome-MRC Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, England.
Kara RainbowMRC Metabolic Diseases Unit, Wellcome-MRC Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, England.
Stefanie BraunOvation Fertility Austin, Embryology and Andrology Laboratories, Austin, TX 78731, USA.
Matthew D VerMilyeaOvation Fertility Austin, Embryology and Andrology Laboratories, Austin, TX 78731, USA. Electronic address: mvermilyea@ovationfertility.com.
Giles S H YeoMRC Metabolic Diseases Unit, Wellcome-MRC Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, England. Electronic address: gshy2@cam.ac.uk.
Anthony C F PerryLaboratory of Mammalian Molecular Embryology, Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, England. Electronic address: perry135@aol.com.
University of Cambridge · GBOvation Fertility · USUniversity of Bath · GB

Funding

Biotechnology and Biological Sciences Research Council BB/P009506/1Biotechnology and Biological Sciences Research Council BB/S017593/1Cancer Research UKMedical Research Council G1000839Medical Research Council MC_UU_00014/1Medical Research Council MC_UU_00014/5Medical Research Council MC_UU_12012/5Medical Research Council MR/N000080/1Medical Research Council MR/N020294/1Medical Research Council MR/S026193/1Wellcome TrustWellcome Trust 208363/Z/17/Z
6 · The paper itself

Abstract

In human embryos, the initiation of transcription (embryonic genome activation [EGA]) occurs by the eight-cell stage, but its exact timing and profile are unclear. To address this, we profiled gene expression at depth in human metaphase II oocytes and bipronuclear (2PN) one-cell embryos. High-resolution single-cell RNA sequencing revealed previously inaccessible oocyte-to-embryo gene expression changes. This confirmed transcript depletion following fertilization (maternal RNA degradation) but also uncovered low-magnitude upregulation of hundreds of spliced transcripts. Gene expression analysis predicted embryonic processes including cell-cycle progression and chromosome maintenance as well as transcriptional activators that included cancer-associated gene regulators. Transcription was disrupted in abnormal monopronuclear (1PN) and tripronuclear (3PN) one-cell embryos. These findings indicate that human embryonic transcription initiates at the one-cell stage, sooner than previously thought. The pattern of gene upregulation promises to illuminate processes involved at the onset of human development, with implications for epigenetic inheritance, stem-cell-derived embryos, and cancer.

Indexed as

Embryo, MammalianGenome, HumanBlastocystEmbryonic DevelopmentGene Expression Regulation, DevelopmentalHumansOocytesembryonic genome activation (EGA)fertilizationhuman one-cell embryosingle-cell RNA-seqtotipotencytranscriptomezygote

Identifiers

PMID34936886
PMCPMC8826644
OpenAlexW4200386511

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.