Evidence map›Paper›PMID 23445935›Full record

ArticleBMC pregnancy and childbirth2013

Maternal circulating leukocytes display early chemotactic responsiveness during late gestation.

Nardhy Gomez-Lopez, Satomi Tanaka, Zoya Zaeem, Gerlinde A Metz, David M Olson

Open access · goldAbstract read
In one paragraph

Article in BMC pregnancy and childbirth, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed
6.3field-weighted citation impact, top 3% 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

42 citing papers in PubMed, 113 citations in OpenAlex.

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  6. Single-cell-level digital twins for preterm birth prevention strategies.bioRxiv : the preprint server for biology · 2025
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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 2 countries.

Nardhy Gomez-LopezDepartment of Obstetrics and Gynecology, Pediatrics and Physiology, University of Alberta, Edmonton T6G 2S2, Canada.
Satomi Tanaka
Zoya Zaeem
Gerlinde A Metz
David M Olson
University of Alberta · CAUniversity of Lethbridge · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundParturition has been widely described as an immunological response; however, it is unknown how this is triggered. We hypothesized that an early event in parturition is an increased responsiveness of peripheral leukocytes to chemotactic stimuli expressed by reproductive tissues, and this precedes expression of tissue chemotactic activity, uterine activation and the systemic progesterone/estradiol shift.

methodsTissues and blood were collected from pregnant Long-Evans rats on gestational days (GD) 17, 20 and 22 (term gestation). We employed a validated Boyden chamber assay, flow cytometry, quantitative real time-polymerase chain reaction, and enzyme-linked immunosorbent assays.

resultsWe found that GD20 maternal peripheral leukocytes migrated more than those from GD17 when these were tested with GD22 uterus and cervix extracts. Leukocytes on GD20 also displayed a significant increase in chemokine (C-C motif) ligand 2 (Ccl2) gene expression and this correlated with an increase in peripheral granulocyte proportions and a decrease in B cell and monocyte proportions. Tissue chemotactic activity and specific chemokines (CCL2, chemokine (C-X-C motif) ligand 1/CXCL1, and CXCL10) were mostly unchanged from GD17 to GD20 and increased only on GD22. CXCL10 peaked on GD20 in cervical tissues. As expected, prostaglandin F2α receptor and oxytocin receptor gene expression increased dramatically between GD20 and 22. Progesterone concentrations fell and estradiol-17β concentrations increased in peripheral serum, cervical and uterine tissue extracts between GD20 and 22.

conclusionMaternal circulating leukocytes display early chemotactic responsiveness, which leads to their infiltration into the uterus where they may participate in the process of parturition.

Indexed as

AnimalsCervix UteriChemokinesChemotaxis, LeukocyteEnzyme-Linked Immunosorbent AssayEstradiolFemaleGene ExpressionLeukocytesParturitionPregnancyPregnancy, AnimalProgesteroneRatsRats, Long-EvansReceptors, OxytocinChemokinesEstradiolProgesteroneReceptors, OxytocinReceptors, Prostaglandin

Identifiers

PMID23445935
PMCPMC3561147
OpenAlexW2023655975

What OpenQuestion holds

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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.