Evidence map›Paper›PMID 22869719›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2012

A paradoxical teratogenic mechanism for retinoic acid.

Leo M Y Lee, Chun-Yin Leung, Walfred W C Tang, Heung-Ling Choi, Yun-Chung Leung, Peter J McCaffery, Chi-Chiu Wang, Adrian S Woolf, Alisa S W Shum

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 83 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
83citing papers in PubMed, 1 pooled it
4.3field-weighted citation impact, top 5% 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

83 citing papers in PubMed, 1 synthesis or guideline pooled it, 139 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. A novelFrontiers in cell and developmental biology · 2026
    Article
  4. Review
  5. Article
  6. Review
  7. The genetics and pathogenesis of CAKUT.Nature reviews. Nephrology · 2023
    Review
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Retinoid metabolism: new insights.Journal of molecular endocrinology · 2022
    Review
  15. Review
  16. Article
  17. Review
  18. Article
  19. Review
  20. Article

23 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

9 authors at 4 institutions in 3 countries.

Leo M Y LeeSchool of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong.
Chun-Yin Leung
Walfred W C Tang
Heung-Ling Choi
Yun-Chung Leung
Peter J McCaffery
Chi-Chiu Wang
Adrian S Woolf
Alisa S W Shum
Chinese University of Hong Kong · CNHong Kong Polytechnic University · HKRoyal Manchester Children's Hospital · GBUniversity of Aberdeen · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Retinoic acid, an active metabolite of vitamin A, plays essential signaling roles in mammalian embryogenesis. Nevertheless, it has long been recognized that overexposure to vitamin A or retinoic acid causes widespread teratogenesis in rodents as well as humans. Although it has a short half-life, exposure to high levels of retinoic acid can disrupt development of yet-to-be formed organs, including the metanephros, the embryonic organ which normally differentiates into the mature kidney. Paradoxically, it is known that either an excess or a deficiency of retinoic acid results in similar malformations in some organs, including the mammalian kidney. Accordingly, we hypothesized that excess retinoic acid is teratogenic by inducing a longer lasting, local retinoic acid deficiency. This idea was tested in an established in vivo mouse model in which exposure to excess retinoic acid well before metanephric rudiments exist leads to failure of kidney formation several days later. Results showed that teratogen exposure was followed by decreased levels of Raldh transcripts encoding retinoic acid-synthesizing enzymes and increased levels of Cyp26a1 and Cyp26b1 mRNAs encoding enzymes that catabolize retinoic acid. Concomitantly, there was significant reduction in retinoic acid levels in whole embryos and kidney rudiments. Restoration of retinoic acid levels by maternal supplementation with low doses of retinoic acid following the teratogenic insult rescued metanephric kidney development and abrogated several extrarenal developmental defects. This previously undescribed and unsuspected mechanism provides insight into the molecular pathway of retinoic acid-induced teratogenesis.

Indexed as

Abnormalities, Drug-InducedAnimalsCytochrome P-450 Enzyme SystemFemaleGene Expression Regulation, DevelopmentalKidneyMaternal ExposureMicePregnancyPregnancy, AnimalRetinoic Acid 4-HydroxylaseRNA, MessengerSignal TransductionTeratogensTime FactorsTretinoinCyp26a1 protein, mouseCYP26B1 protein, humanCyp26b1 protein, mouseCytochrome P-450 Enzyme SystemRetinoic Acid 4-HydroxylaseRNA, MessengerTeratogensTretinoin

Identifiers

PMID22869719
PMCPMC3427051
OpenAlexW2054318181

What OpenQuestion holds

Textmetadata
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.