Cited by 161Reproductive System and PregnancyCell death mechanisms and regulationPregnancy and preeclampsia studies

Differential Regulation and Function of the Fas/Fas Ligand System in Human Trophoblast Cells1

Aschkenazi, Sarit, Straszewski, Shawn, Verwer, Karlijn M.A., Foellmer, Harald, Rutherford, Thomas, Mor, Gil·2002·Biology of Reproduction

Abstract

Trophoblast rejection, which is characterized by increased apoptosis, is mediated by T helper (Th)-1, or proinflammatory, cytokines, whereas Th-2, or anti-inflammatory, cytokines confer immune protection and facilitate implantation. We investigated the role of both types of cytokines on the expression and function of the Fas/Fas ligand (FasL) apoptotic pathway in trophoblast cells. First-trimester human trophoblast primary-culture cells as well as A3 and HTR/8 trophoblast cell lines were treated with proinflammatory cytokines such as interferon-gamma (IFN-gamma) and tumor necrosis factor alpha (TNFalpha) and with the anti-inflammatory cytokines interleukin (IL)-6 and IL-10. Sensitivity to Fas-mediated apoptosis was measured using an activating anti-Fas monoclonal antibody. Cell viability was evaluated using the MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide) and CellTiter 96 assay. Fas/FasL mRNA and protein expression levels were determined using reverse transcription-polymerase chain reaction (RT-PCR) and Western blot analysis, respectively. Trophoblast cells normally express FasL, but low levels of Fas, and they are resistant to Fas-mediated apoptosis. IFN-gamma and TNFalpha promote Fas expression and sensitivity, whereas IL-6 and IL-10 increase the resistance of trophoblast cells to Fas-mediated apoptosis. Furthermore, IL-10 treatment activates FLICE-like inhibitory protein (FLIP), a downstream inhibitor of Fas apoptotic signaling. Although trophoblast cells express Fas, susceptibility to Fas does not necessarily correlate with its expression. In this study, we demonstrate that Th-2 cytokines increase the resistance of trophoblast cells to Fas-mediated apoptosis either by inhibiting Fas expression or by inducing FLIP activation. This "trophoblast-cytokine-Fas/FasL triad" determines the ability of the Fas/FasL system to regulate trophoblast viability and, consequently, the success or failure of pregnancy.

Integrity signals

Registry

Crossref · 10.1095/biolreprod66.6.1853

Cites

71 of 71 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Aschkenazi, S., Straszewski, S., Verwer, K. M. A., Foellmer, H., Rutherford, T., & Mor, G.
Affiliations
Yale University (US)
Corresponding author
Mor, Gil
Venue
Biology of Reproduction
Published
2002-06-01
Volume
66
Issue
6
Pages
1853-1861
ISSN
  • 0006-3363 (ISSN-L)
  • 1529-7268
OpenAlex
W2142773418
Cited by
161
References
71
Citations by year
2026: 2 · 2025: 2 · 2024: 3 · 2023: 1 · 2022: 4 · 2021: 8 · 2020: 7 · 2019: 5 · 2018: 6 · 2017: 2 · 2016: 6 · 2015: 2 · 2014: 8 · 2013: 8 · 2012: 6
FWCI
3.39
Type
journal article
Language
en
Open access
closed
Locations
  • Biology of Reproduction (publishedVersion)
  • PubMed (publishedVersion)
  • BioOne Complete (BioOne) (submittedVersion)
Funders
  • National Cancer Institute (R01CA092435, R01 CA92435-01)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01 HD37137-01A2, R01HD037137)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Reproductive System and Pregnancy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Health Sciences › Medicine › Obstetrics and Gynecology › Pregnancy and preeclampsia studies
Keywords
Fas/Fas ligand, trophoblast, apoptosis, Th1 cytokines, Th2 cytokines, interferon-gamma, TNF-α, interleukin-6, IL-10, FLICE-like inhibitory protein, Fas expression, implantation, pregnancy outcomes
MeSH terms
Carrier Proteins, Cells, Cultured, Female, Gene Expression Regulation, Gestational Age, Humans, Interferon-gamma, Membrane Glycoproteins, Pregnancy, Trophoblasts, Tumor Necrosis Factor-alpha, Blotting, Western, Interleukin-6, Cytokines, Interleukin-10, Apoptosis, Th1 Cells, Th2 Cells, fas Receptor, Reverse Transcriptase Polymerase Chain Reaction, Intracellular Signaling Peptides and Proteins, Fas Ligand Protein, CASP8 and FADD-Like Apoptosis Regulating Protein

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review