Evidence map›Paper›PMID 34172448›Full record

ArticleScience advances2021

Epigenetic clocks reveal a rejuvenation event during embryogenesis followed by aging.

Csaba Kerepesi, Bohan Zhang, Sang-Goo Lee, Alexandre Trapp, Vadim N Gladyshev

Open access · goldAbstract read
In one paragraph

Article in Science advances, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed
7.6field-weighted citation impact, top 2% 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

73 citing papers in PubMed, 113 citations in OpenAlex.

  1. Article
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  9. Research progress on blood therapy for anti-aging.Journal of advanced research · 2026
    Review
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  18. The Morphological, Behavioral, and Transcriptomic Life Cycle of Anthrobots.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
    Article
  19. Review
  20. Observational

13 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

5 authors at 1 institution in 1 country.

Csaba KerepesiDivision of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.ORCID http://orcid.org/0000-0001-9541-246X
Bohan ZhangDivision of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.
Sang-Goo LeeDivision of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.ORCID http://orcid.org/0000-0003-0699-0765
Alexandre TrappDivision of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.ORCID http://orcid.org/0000-0001-7938-0410
Vadim N GladyshevDivision of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. vgladyshev@rics.bwh.harvard.edu.ORCID http://orcid.org/0000-0002-0372-7016
Brigham and Women's Hospital · US

Funding

The role of hyaluronan in longevity and cancer resistance of longest-lived rodentP01AG047200 · NIA · UNIVERSITY OF ROCHESTER · PI Vadim N. Gladyshev · 2014 to 2026
$36.9M
QUANTITATIVE ASSESSMENT OF BIOLOGICAL AGE AND ITS APPLICATIONSR01AG065403 · NIA · YALE UNIVERSITY · PI Vadim N. Gladyshev, Albert Tzongyang Higgins-Chen · 2020 to 2026
$4.2M
Unbiased identification of interventions that extend lifespanR01AG067782 · NIA · BRIGHAM AND WOMEN'S HOSPITAL · PI GLADYSHEV, VADIM N. · 2019 to 2023
$3.5M
Role of rare damaging mutations in agingR01AG064223 · NIA · BRIGHAM AND WOMEN'S HOSPITAL · PI GLADYSHEV, VADIM N. · 2020 to 2024
$2.8M
NIA NIH HHS P01 AG047200NIA NIH HHS R01 AG064223NIA NIH HHS R01 AG065403NIA NIH HHS R01 AG067782
6 · The paper itself

Abstract

The notion that the germ line does not age goes back to the 19th-century ideas of August Weismann. However, being metabolically active, the germ line accumulates damage and other changes over time, i.e., it ages. For new life to begin in the same young state, the germ line must be rejuvenated in the offspring. Here, we developed a multi-tissue epigenetic clock and applied it, together with other aging clocks, to track changes in biological age during mouse and human prenatal development. This analysis revealed a significant decrease in biological age, i.e., rejuvenation, during early stages of embryogenesis, followed by an increase in later stages. We further found that pluripotent stem cells do not age even after extensive passaging and that the examined epigenetic age dynamics is conserved across species. Overall, this study uncovers a natural rejuvenation event during embryogenesis and suggests that the minimal biological age (ground zero) marks the beginning of organismal aging.

Identifiers

PMID34172448
PMCPMC8232908
OpenAlexW3174549668

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.