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[A biochemical study on the effects of interleukin-6 for premature rupture of membranes]
1First Department of Obstetrics and Gynecology, Toho University School of Medicine, Tokyo.
Insights
Chorionic cells produce significant Interleukin-6 (IL-6), a key inflammatory cytokine. This IL-6 may contribute to premature rupture of membranes (PROM) by affecting amniotic cells.
Area of Science:
- Reproductive biology
- Immunology
- Cell biology
Context:
- Chorioamnionitis is linked to premature rupture of membranes (PROM).
- Interleukin-6 (IL-6) is a critical cytokine in inflammatory processes.
- The role of IL-6 in the pathogenesis of PROM requires further elucidation.
Purpose:
- To investigate the correlation between PROM and IL-6 production and response in human chorionic and amniotic cells.
- To examine IL-6 release from these cells under various stimuli.
- To understand the cellular effects of IL-6 on amniotic cells.
Summary:
- Human chorionic and amniotic cells were cultured to assess IL-6 production.
- Chorionic cells produced significantly more IL-6 than amniotic cells.
- Both cell types increased IL-6 release upon IL-1 stimulation; LPS stimulated chorionic cells but not amniotic cells.
- IL-6 was shown to expand cellular gaps in amniotic cells, and IL-1 treatment induced actin polymerization in co-cultured amniotic cells.
Impact:
- Findings suggest chorionic cells, stimulated by IL-1 or LPS, release substantial IL-6.
- This IL-6 may constrict amniotic cells, potentially playing a role in the mechanism of PROM.
- Highlights IL-6 as a potential mediator in PROM development.
Abstract:
Chorioamnionitis was thought to be a cause of premature rupture of membranes (PROM). Recently it has been accepted that IL-6 is one of the important cytokines in inflammation. To investigate the correlation between PROM and IL-6, IL-6 production in chorionic cells and amniotic cells was examined. Moreover, the response of these cells to IL-6 was also examined. The results were as follows. 1. Chorionic cells and amniotic cells obtained from human membranes were cultured. 2. Comparing IL-6 production, chorionic cells produced a larger amount of IL-6 (425pg/ml/24 hrs) than amniotic cells (4pg/ml/24 hrs). 3. IL-1 treatment (10U/ml) caused a significant increase in IL-6 release from both chorionic and amniotic cells (43.2ng/ml/24hrs vs. 50.3pg/ml/24hrs, respectively). 4. Lipopolysaccharide (LPS) (10 micrograms/ml) stimulated the release of IL-6 in chorionic cells, but did not affect it in amniotic cells at all. 5. By staining with F actin, it was demonstrated that IL-6 expanded the cellular gap in amniotic cells. 6. After amniotic cells were co-cultured with chorionic cells, IL-1 treatment caused actin-polymerization in amniotic cells. These results suggest that chorionic cells produce a large amount of IL-6 as a result of stimulation by IL-1 or LPS, and the IL-6 produced constricts the amniotic cells. The phenomena may participate in the mechanism of PROM.