Evidence map›Paper›PMID 40510743›Full record

ArticleFrontiers in cell and developmental biology2025

Embryo-derived trypsin-induced calcium entry is inhibited by endometrial infertility factor, LEFTY2.

Zhiqi Yang, Jing Yan, Steffen Kull, Md Alauddin, Sara Y Brucker, Melanie Henes, Florian Lang, Madhuri S Salker

Abstract read
In one paragraph

Article in Frontiers in cell and developmental biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
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

3 citing papers in PubMed.

  1. Review
  2. Article
  3. Review
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.

Zhiqi YangDepartment for Women's Health, University Hospital Tübingen, Tübingen, Germany.
Jing YanDepartment of Physiology, University of Tübingen, Tübingen, Germany.
Steffen KullDepartment for Women's Health, University Hospital Tübingen, Tübingen, Germany.
Md AlauddinDepartment for Women's Health, University Hospital Tübingen, Tübingen, Germany.
Sara Y BruckerDepartment for Women's Health, University Hospital Tübingen, Tübingen, Germany.
Melanie HenesDepartment for Women's Health, University Hospital Tübingen, Tübingen, Germany.
Florian LangDepartment of Physiology, University of Tübingen, Tübingen, Germany.
Madhuri S SalkerDepartment for Women's Health, University Hospital Tübingen, Tübingen, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Introduction: A transient window of uterine receptivity ensures that embryos implant in an optimal endometrial environment. Failure to establish or premature closure of the implantation window is thought to be a major cause of infertility, which affects many couples globally. Embryos release trypsin, which designates its developmental potential and plays a crucial role in implantation. Calcium (Ca Methods: Results: We report that the trypsin machinery is established at the blastocyst stage and that high levels of trypsin are associated with a successful pregnancy. Treatment with LEFTY2 or combined treatment with LEFTY2 and trypsin blocked the increase of L-type Ca Discussion: Taken together, we demonstrate that high trypsin levels are associated with a positive pregnancy outcome and that infertility factor LEFTY2 downregulates trypsin induced Ca

Indexed as

Ca2+ channelsendometriumLEFTY2receptivityunexplained reproductive failure

Identifiers

PMID40510743
PMCPMC12158927

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Registered trials

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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.