Evidence map›Paper›PMID 19307558›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2009

The endometrium responds differently to cloned versus fertilized embryos.

Stefan Bauersachs, Susanne E Ulbrich, Valeri Zakhartchenko, Megan Minten, Myriam Reichenbach, Horst-Dieter Reichenbach, Helmut Blum, Thomas E Spencer, Eckhard Wolf

Open access · greenAbstract readComparative Study
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers.

0numbers the graph read from it
0cells of the map it votes in
65citing papers in PubMed
22.9field-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

65 citing papers in PubMed, 214 citations in OpenAlex.

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  8. Bovine Endometrium Drives and Responds to Divergence of In Vitro Produced Conceptus Biochemistry.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2025
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  18. Human embryo implantation.Development (Cambridge, England) · 2023
    Review
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  20. Review

5 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 2 countries.

Stefan BauersachsMolecular Animal Breeding and Biotechnology, and Laboratory for Functional Genome Analysis, Gene Center, Ludwig-Maximilians-Universität München, 81377 Munich, Germany.
Susanne E Ulbrich
Valeri Zakhartchenko
Megan Minten
Myriam Reichenbach
Horst-Dieter Reichenbach
Helmut Blum
Thomas E Spencer
Eckhard Wolf
Ludwig-Maximilians-Universität München · DETexas A&M University · USBavarian State Research Center for Agriculture · DETechnical University of Munich · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although somatic cell nuclear transfer (SCNT) cloning is more efficient in cattle than in any other species tested so far, there is a high rate of pregnancy failure that has been linked to structural and functional abnormalities of the placenta. We tested the hypothesis that these changes may originate from disturbed embryo-maternal interactions in the peri-implantation period. Therefore, we evaluated the response of the endometrium to SCNT embryos (produced from 7 different fetal fibroblast cell lines) as compared with embryos derived from in vitro fertilization (IVF). SCNT embryos and IVF embryos were cultured under identical conditions to the blastocyst stage (day 7) and were transferred to corresponding recipients, which were slaughtered at day 18 of pregnancy. The mRNA profiles of endometrium samples were obtained using a custom cDNA microarray enriched for transcripts differentially expressed in the endometrium and/or oviduct epithelium during the estrous cycle and/or early pregnancy. Overall, the variation in mRNA profiles was greater in the SCNT group than in the IVF group. Furthermore, 58 transcripts were differentially abundant in endometria from SCNT and IVF pregnancies. Prominent examples are orphan nuclear receptor COUP-TFII and connexin 43, both known to play important roles in uterine receptivity and conceptus placentation. These findings suggest that placental failure in bovine clone pregnancies may originate from abnormal embryo-maternal communication that develops during the peri-implantation period. Endometrium transcriptome profiles may serve as a tool to evaluate SCNT embryos for their ability to establish pregnancy and develop a functional placenta.

Indexed as

Fertilization in VitroGene Expression Regulation, DevelopmentalNuclear Transfer TechniquesAnimalsCattleCell LineCloning, OrganismEmbryo, MammalianEmbryonic DevelopmentEndometriumFemaleFibroblastsGene Expression ProfilingPlacentaPregnancyPregnancy ComplicationsRNA, Messenger

Identifiers

PMID19307558
PMCPMC2666995
OpenAlexW2120171525

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.