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- W3121368045 abstract "Abstract Preterm birth is associated with significant neonatal mortality and morbidity worldwide. Chorioamnionitis, inflammation of the fetal membranes (FMs), is a major risk factor and is characterized by neutrophil infiltration. However, the role of neutrophils at the FMs remains unclear. We recently reported that FMs exposed to bacterial LPS recruited more neutrophils compared with resting FMs and activated them to degranulate and release reactive oxygen species, chemokines/cytokines, and neutrophil extracellular traps. We posit that under resting conditions, neutrophils play a protective surveillance role, whereas during infection/inflammation, they induce FM tissue injury. To test this, human FM explants were exposed to neutrophil conditioned media (CM). We demonstrate that CM from neutrophils exposed to resting FM-CM did not affect FM viability or function. Conversely, CM from neutrophils activated by LPS-stimulated FM-CM significantly increased FM secretion of inflammatory IL-6, IL-8, GRO-α, and the markers of membrane weakening, MMP-9 and PGE2. This FM response was partially mediated by ERK signaling and neutrophil extracellular traps through the activation of the DNA sensor, TLR-9. Thus, neutrophils recruited by FMs during infection can propagate FM inflammation and weakening, acting in a feed-forward mechanism to propagate tissue injury at the maternal–fetal interface, increasing the risk of premature FM rupture and preterm birth in women with intrauterine infection." @default.
- W3121368045 created "2021-02-01" @default.
- W3121368045 creator A5005367112 @default.
- W3121368045 creator A5047310369 @default.
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- W3121368045 date "2021-03-01" @default.
- W3121368045 modified "2023-10-17" @default.
- W3121368045 title "Activated Neutrophils Propagate Fetal Membrane Inflammation and Weakening through ERK and Neutrophil Extracellular Trap–Induced TLR-9 Signaling" @default.
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- W3121368045 doi "https://doi.org/10.4049/jimmunol.2001268" @default.
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- W3121368045 hasPublicationYear "2021" @default.
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