Evidence map›Paper›PMID 32183826›Full record

ArticleReproductive biology and endocrinology : RB&E2020

Characterization of VDR and CYP27B1 expression in the endometrium during the menstrual cycle before embryo transfer: implications for endometrial receptivity.

Jing Guo, Shan Liu, Peng Wang, Haiying Ren, Yuan Li

Open access · goldAbstract read
In one paragraph

Article in Reproductive biology and endocrinology : RB&E, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
3.8field-weighted citation impact, top 6% 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

20 citing papers in PubMed, 1 synthesis or guideline pooled it, 42 citations in OpenAlex.

  1. Pooled it
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  7. Phospholipid flippase ATP11A brokers uterine epithelial integrity and function.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  19. Vitamin DInternational journal of molecular sciences · 2022
    Article
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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 2 institutions in 1 country.

Jing GuoCenter for Reproductive Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Workers' stadium South Road 8, Chao-yang district, Beijing, China.
Shan LiuCenter for Reproductive Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Workers' stadium South Road 8, Chao-yang district, Beijing, China.
Peng WangCenter for Reproductive Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Workers' stadium South Road 8, Chao-yang district, Beijing, China.
Haiying RenCenter for Reproductive Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Workers' stadium South Road 8, Chao-yang district, Beijing, China. 13381139927@163.com.
Yuan LiCenter for Reproductive Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Workers' stadium South Road 8, Chao-yang district, Beijing, China. cyliyuan@126.com.
Beijing Chao-Yang Hospital · CNCapital Medical University · CN

Funding

the 1351 Program of Beijing Chao-Yang Hospital CYXX-2017-20 and CYMY-2017-21the Science Research and Development Fund of Capital Medical University PYZ2017003
6 · The paper itself

Abstract

backgroundMolecular analyses of vitamin D in a typical cycling endometrium has received minimal research attention in the reproductive field. This study was designed to assess how expression of the endometrial vitamin D receptor (VDR) and CYP27B1, a vitamin D metabolizing enzyme, change during the menstrual cycle in women of reproductive age. In addition, this study explores the association between expression of vitamin D-VDR system and endometrial receptivity during the implantation window.

methodsSixteen patients underwent standardized in vitro fertilization (IVF) treatment and freeze-all techniques. Before embryo transfer, total serum 25(OH) D levels were determined through blood samples and VDR, CYP27B1, HOXA10, and CYP19 expression were determined through endometrial samples. Endometrial receptivity was also assessed using an electron microscope.

resultsWe found that VDR protein expression was significantly lower throughout the endometrial secretory phase compared to the proliferative phase, while CYP27B1 expression remained constant during the menstrual cycle. During the implantation window, ultrastructural evaluation showed that higher serum vitamin D levels were associated with more mature pinopodes; VDR and HOXA10 protein expression were substantially elevated in pregnant women compared to non-pregnant women; and VDR protein levels were positively correlated with HOXA10 levels. In addition, serum vitamin D levels were positively correlated with VDR and HOXA10 protein levels in the endometrium.

conclusionsWomen with increased VDR expression in the endometrium, especially during the implantation window of the menstrual cycle, were significantly more likely to be pregnant than women with decreased expression. Our results support the hypothesis that the Vitamin D-VDR system performs a role during the development of endometrial receptivity.

Indexed as

Embryo ImplantationMenstrual Cycle25-Hydroxyvitamin D3 1-alpha-HydroxylaseAdultEndometriumFemaleFertilization in VitroHomeobox A10 ProteinsHumansImmunohistochemistryMicroscopy, Electron, ScanningMicroscopy, Electron, TransmissionReceptors, CalcitriolVitamin D25-Hydroxyvitamin D3 1-alpha-HydroxylaseCYP27B1 protein, humanHomeobox A10 ProteinsHOXA10 protein, humanReceptors, CalcitriolVDR protein, humanVitamin DCYP27B1Endometrial receptivityIn-vitro fertilizationVitamin DVitamin D receptor

Identifiers

PMID32183826
PMCPMC7079352
OpenAlexW3010668667

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.