Critical Paracrine Interactions Between TNF-α and IL-10 Regulate Lipopolysaccharide-Stimulated Human Choriodecidual Cytokine and Prostaglandin E2 Production

Sato, Timothy A.; Keelan, Jeffrey A.; Mitchell, Murray D.

doi:10.4049/jimmunol.170.1.158

Cited by 104 publications

(75 citation statements)

References 72 publications

(52 reference statements)

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“…It inhibits production of proinflammatory cytokines such as TNFα, IL-1β, IL-6 and IL-8 (71,72). In the present study, we observed a decrease in IL-10 after treating RAW 264.7 cells with DMA in the presence of LPS.…”

Section: Dma Inhibits the Transcriptional Activity Of Nf-κb But Not Asupporting

confidence: 66%

N,N-Dimethylacetamide Significantly Attenuates LPS- and TNFα-Induced Proinflammatory Responses Via Inhibition of the Nuclear Factor Kappa B Pathway

Pekson

Poltoratsky

Gorasiya

et al. 2016

Mol Med

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Previously, we have shown that N,N-dimethylacetamide (DMA) prevents inflammation-induced preterm birth in a murine model, inhibits lipopolysaccharide (LPS)-induced increases in placental proinflammatory cytokines and upregulates the antiinflammatory cytokine interleukin-10 (IL-10). However, DMA's mechanism of action remains to be elucidated. In the current study, we investigate how DMA produces its antiinflammatory effect. Using in vitro and ex vivo models, we show that DMA suppresses secretion of proinflammatory cytokines in lipopolysaccharide (LPS)-induced RAW 264.7 cells, TNFα-challenged JEG-3 cells and LPS-stimulated human placental explants. DMA significantly attenuated secretion of TNFα, IL-6, IL-10 and granulocyte macrophage colony stimulating factor (GM-CSF) from LPS-stimulated RAW 264.7 cells; IL-6 secretion from TNFα-stimulated JEG-3 cells; and TNFα, IL-6, IL-10, GM-CSF and Interleukin-8 (IL-8) from LPS-stimulated human placental explants. We further investigated whether DMA's effect on cytokine expression involves the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) and mitogen-activated protein kinase (MAPK) pathways. DMA (10 mM) significantly inhibited degradation of nuclear factor of kappa light polypeptide gene enhancer in B cell inhibitor α (IκBα) in LPS-stimulated RAW 264.7 cells, but there was no significant change in the expression of phosphorylated or native forms of downstream proteins in the MAPK pathway. In addition, DMA significantly attenuated luciferase activity in cells co-transfected with NF-κB-Luc reporter plasmid, but not with AP-1-Luc or CEBP-Luc reporters. Overall, our findings suggest that the antiinflammatory activity of DMA is mediated by inhibition of the NF-κB pathway via decreased IκBα degradation.

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Section: Dma Inhibits the Transcriptional Activity Of Nf-κb But Not Asupporting

confidence: 66%

N,N-Dimethylacetamide Significantly Attenuates LPS- and TNFα-Induced Proinflammatory Responses Via Inhibition of the Nuclear Factor Kappa B Pathway

Pekson

Poltoratsky

Gorasiya

et al. 2016

Mol Med

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“…To test this hypothesis, the role of D6 in two animal models of fetal loss associated with inflammatory conditions was investigated. The first model was based on the induction of a systemic inflammatory response in mice by LPS treatment (16), an animal model mimicking a clinical condition frequently associated with abortion and preterm delivery in humans (17). Injection of pregnant D6 Ϫ/Ϫ mice with LPS resulted in a significant increase in fetal loss frequency (Fig.…”

Section: Resultsmentioning

confidence: 99%

Protection against inflammation- and autoantibody-caused fetal loss by the chemokine decoy receptor D6

Torre

Buracchi

Borroni

et al. 2007

Proc. Natl. Acad. Sci. U.S.A.

168

204

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Fetal loss in animals and humans is frequently associated with inflammatory conditions. D6 is a promiscuous chemokine receptor with decoy function, expressed in lymphatic endothelium, that recognizes and targets to degradation most inflammatory CC chemokines. Here, we report that D6 is expressed in placenta on invading extravillous trophoblasts and on the apical side of syncytiotrophoblast cells, at the very interface between maternal blood and fetus. Exposure of D6 ؊/؊ pregnant mice to LPS or antiphospholipid autoantibodies results in higher levels of inflammatory CC chemokines and increased leukocyte infiltrate in placenta, causing an increased rate of fetal loss, which is prevented by blocking inflammatory chemokines. Thus, the promiscuous decoy receptor for inflammatory CC chemokines D6 plays a nonredundant role in the protection against fetal loss caused by systemic inflammation and antiphospholipid antibodies.trophoblast ͉ leukocyte ͉ placenta

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“…This response is amplified by LPS-induced uterine NK cell synthesis of IFN-␥ (47). Cytokine responses in decidual leukocytes are augmented by increased production of a range of inflammatory cytokines, including TNF-␣, IL-1, IL-6, and IL-12 in choriodecidual membranes (49) and placental trophoblast cells (50).…”

Section: Discussionmentioning

confidence: 99%

Essential Role for IL-10 in Resistance to Lipopolysaccharide-Induced Preterm Labor in Mice

Robertson

Skinner

Care

2006

The Journal of Immunology

174

139

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IL-10 is highly expressed in the uterus and placenta and is implicated in controlling inflammation-induced pathologies of pregnancy. To investigate the role of IL-10 in regulating preterm labor, the response of IL-10 null mutant mice to low-dose LPS in late gestation was evaluated. When IL-10 null mutant C57BL/6 (IL-10−/−) and control (IL-10+/+) mice were administered LPS on day 17 of pregnancy, the dose of LPS required to elicit 50% preterm fetal loss was 10-fold lower in IL-10−/− mice than in IL-10+/+ mice. Surviving fetuses in IL-10−/− mice exhibited fetal growth restriction at lower doses of LPS than IL-10+/+ mice. Marked elevation of LPS-induced immunoactive TNF-α and IL-6 was evident in the serum, uterus, and placenta of IL-10−/− mice, and TNF-α and IL-6 mRNA expression was elevated in the uterus and placenta, but not the fetus. Serum IL-1α, IFN-γ, and IL-12p40 were increased and soluble TNFRII was diminished in the absence of IL-10, with these changes also reflected in the gestational tissues. Administration of rIL-10 to IL-10−/− mice attenuated proinflammatory cytokine synthesis and alleviated their increased susceptibility to preterm loss. Exogenous IL-10 also protected IL-10+/+ mice from fetal loss. These data show that IL-10 modulates resistance to inflammatory stimuli by down-regulating proinflammatory cytokines in the uterus and placenta. Abundance of endogenous IL-10 in gestational tissues is therefore identified as a critical determinant of resistance to preterm labor, and IL-10 may provide a useful therapeutic agent in this common condition.

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Critical Paracrine Interactions Between TNF-α and IL-10 Regulate Lipopolysaccharide-Stimulated Human Choriodecidual Cytokine and Prostaglandin E2 Production

Cited by 104 publications

References 72 publications

N,N-Dimethylacetamide Significantly Attenuates LPS- and TNFα-Induced Proinflammatory Responses Via Inhibition of the Nuclear Factor Kappa B Pathway

N,N-Dimethylacetamide Significantly Attenuates LPS- and TNFα-Induced Proinflammatory Responses Via Inhibition of the Nuclear Factor Kappa B Pathway

Protection against inflammation- and autoantibody-caused fetal loss by the chemokine decoy receptor D6

Essential Role for IL-10 in Resistance to Lipopolysaccharide-Induced Preterm Labor in Mice

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