ArticleAmerican journal of reproductive immunology (New York, N.Y. : 1989)2017
Amniotic fluid neutrophils can phagocytize bacteria: A mechanism for microbial killing in the amniotic cavity.
Article in American journal of reproductive immunology (New York, N.Y. : 1989), 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers.
What it found
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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.
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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.
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Who cites it
51 citing papers in PubMed, 65 citations in OpenAlex.
- Amniotic fluid cell-free transcriptome: a glimpse into fetal development and placental cellular dynamics during normal pregnancy.BMC medical genomics · 2020Trial
- Cellular immune responses in amniotic fluid of women with preterm labor and intra-amniotic infection or intra-amniotic inflammation.American journal of reproductive immunology (New York, N.Y. : 1989) · 2019Trial
- Fetal T Cell Activation in the Amniotic Cavity during Preterm Labor: A Potential Mechanism for a Subset of Idiopathic Preterm Birth.Journal of immunology (Baltimore, Md. : 1950) · 2019Trial
- Effector and Activated T Cells Induce Preterm Labor and Birth That Is Prevented by Treatment with Progesterone.Journal of immunology (Baltimore, Md. : 1950) · 2019Trial
- Complement and neutrophils are actively involved at the cervicovaginal interface in cases of adverse microbial composition, cervical shortening and spontaneous preterm birth.NPJ biofilms and microbiomes · 2026Article
- Infections as a Cause of Preterm Birth: Amniotic Fluid Sludge-An Ultrasound Marker for Intra-Amniotic Infections and a Risk Factor for Preterm Birth.Diagnostics (Basel, Switzerland) · 2025Review
- The clinic application of mNGS and ENA-78 assays to identify intra-amniotic infection/inflammation.Frontiers in cellular and infection microbiology · 2025Article
- Article
- Factors of Fetal Origin in the Regulation of Labor Initiation and Preterm Birth.Maternal-fetal medicine (Wolters Kluwer Health, Inc.) · 2023Article
- Microbial Profiling of Amniotic Fluid, Umbilical Blood and Placenta of the Foaling Mare.Animals : an open access journal from MDPI · 2023Article
- Intra-amniotic inflammation in the mid-trimester of pregnancy is a risk factor for neuropsychological disorders in childhood.Journal of perinatal medicine · 2023Article
- Circulating Extracellular Vesicles microRNAs Are Altered in Women Undergoing Preterm Birth.International journal of molecular sciences · 2023Article
- The Role of Neutrophils in Pregnancy, Term and Preterm Labour.Life (Basel, Switzerland) · 2022Review
- The amniotic fluid proteome predicts imminent preterm delivery in asymptomatic women with a short cervix.Scientific reports · 2022Article
- The immunobiology of preterm labor and birth: intra-amniotic inflammation or breakdown of maternal-fetal homeostasis.Reproduction (Cambridge, England) · 2022Review
- Pregnancy tailors endotoxin-induced monocyte and neutrophil responses in the maternal circulation.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2022Article
- IL-22 Plays a Dual Role in the Amniotic Cavity: Tissue Injury and Host Defense against Microbes in Preterm Labor.Journal of immunology (Baltimore, Md. : 1950) · 2022Article
- The amniotic fluid proteome changes with gestational age in normal pregnancy: a cross-sectional study.Scientific reports · 2022Article
- Article
- Preterm labor is characterized by a high abundance of amniotic fluid prostaglandins in patients with intra-amniotic infection or sterile intra-amniotic inflammation.The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians · 2021Article
Corrections and comments
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Authors and funding
8 authors at 2 institutions in 1 country.
Funding
Abstract
problemNeutrophils are capable of performing phagocytosis, a primary mechanism for microbial killing. Intra-amniotic infection is characterized by an influx of neutrophils into the amniotic cavity. Herein, we investigated whether amniotic fluid neutrophils could phagocytize bacteria found in the amniotic cavity of women with intra-amniotic infection.
methodsAmniotic fluid neutrophils from women with intra-amniotic infection were visualized by transmission electron microscopy (n=6). The phagocytic activity of amniotic fluid neutrophils from women with intra-amniotic infection and/or inflammation (n=10) or peripheral neutrophils from healthy individuals (controls, n=3) was tested using ex vivo phagocytosis assays coupled with live imaging. Phagocytosis by amniotic fluid neutrophils was also visualized by confocal microscopy (n=10) as well as scanning and transmission electron microscopy (n=5).
results(i) Intra-amniotic infection-related bacteria including cocci (eg Streptococcus agalactiae), bacilli (eg Bacteriodes fragilis and Prevotella spp.), and small bacteria without a cell wall (eg Ureaplasma urealyticum) were found inside of amniotic fluid neutrophils; (ii) peripheral neutrophils (controls) rapidly phagocytized S. agalactiae, U. urealyticum, Gardnerella vaginalis, and Escherichia coli; (iii) amniotic fluid neutrophils rapidly phagocytized S. agalactiae and G. vaginalis; and (iv) amniotic fluid neutrophils slowly phagocytized U. urealyticum and E. coli; yet, the process of phagocytosis of the genital mycoplasma was lengthier.
conclusionAmniotic fluid neutrophils can phagocytize bacteria found in the amniotic cavity of women with intra-amniotic infection, namely S. agalactiae, U. urealyticum, G. vaginalis, and E. coli. Yet, differences in the rapidity of phagocytosis were observed among the studied microorganisms. These findings provide a host defense mechanism whereby amniotic fluid neutrophils can kill microbes invading the amniotic cavity.
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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.