Evidence map›Paper›PMID 19279047›Full record

SynthesisHuman reproduction update

Regulatory T-cells and immune tolerance in pregnancy: a new target for infertility treatment?

Leigh R Guerin, Jelmer R Prins, Sarah A Robertson

Open access · bronzeAbstract readSystematic Review
In one paragraph

Synthesis in Human reproduction update. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 171 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
171citing papers in PubMed, 1 pooled it
10.9field-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

171 citing papers in PubMed, 1 synthesis or guideline pooled it, 495 citations in OpenAlex.

  1. Pooled it
  2. Trial
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  7. Review
  8. Endometrial Epithelial Lactate Deficiency Drives CD8Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Article
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  11. Observational
  12. Observational
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  15. Interleukin-1 receptor type 1 inhibition improves blood pressure, fetal growth and immune balance in placental ischemic rats.American journal of physiology. Regulatory, integrative and comparative physiology · 2025
    Article
  16. Maternal Immune Characteristics at Mid and Late Pregnancy Are Mostly Independent of Fetal Allogeneity in Mice.American journal of reproductive immunology (New York, N.Y. : 1989) · 2025
    Article
  17. Article
  18. Article
  19. Article
  20. Review

111 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

3 authors at 2 institutions in 2 countries.

Leigh R GuerinResearch Centre for Reproductive Health, School of Paediatrics and Reproductive Health, University of Adelaide, SA 5005, Australia.
Jelmer R Prins
Sarah A Robertson
University of Adelaide · AUUniversity of Groningen · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAdaptation of the maternal immune response to accommodate the semi-allogeneic fetus is necessary for pregnancy success, and disturbances in maternal tolerance are implicated in infertility and reproductive pathologies. T regulatory (Treg) cells are a recently discovered subset of T-lymphocytes with potent suppressive activity and pivotal roles in curtailing destructive immune responses and preventing autoimmune disease.

methodsA systematic review was undertaken of the published literature on Treg cells in the ovary, testes, uterus and gestational tissues in pregnancy, and their link with infertility, miscarriage and pathologies of pregnancy. An overview of current knowledge on the generation, activation and modes of action of Treg cells in controlling immune responses is provided, and strategies for manipulating regulatory T-cells for potential applications in reproductive medicine are discussed.

resultsStudies in mouse models show that Treg cells are essential for maternal tolerance of the conceptus, and that expansion of the Treg cell pool through antigen-specific and antigen non-specific pathways allows their suppressive actions to be exerted in the critical peri-implantation phase of pregnancy. In women, Treg cells accumulate in the decidua and are elevated in maternal blood from early in the first trimester. Inadequate numbers of Treg cells or their functional deficiency are linked with infertility, miscarriage and pre-eclampsia.

conclusionsThe potency and wide-ranging involvement of Treg cells in immune homeostasis and disease pathology indicates the considerable potential of these cells as therapeutic agents, raising the prospect of their utility in novel treatments for reproductive pathologies.

Indexed as

Immune ToleranceAbortion, SpontaneousAnimalsCytokinesDendritic CellsFemaleHumansIndoleamine-Pyrrole 2,3,-DioxygenaseInfertilityMaleMiceModels, ImmunologicalOvaryPregnancyPregnancy ComplicationsProstaglandinsCytokinesIndoleamine-Pyrrole 2,3,-DioxygenaseProstaglandinsToll-Like Receptors

Identifiers

PMID19279047
PMCPMC2725755
OpenAlexW2124221440

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.