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Öğe Altered expression of Notch signaling, Tlr receptors, and surfactant protein expression after prostaglandin inhibition may be associated with the delayed labor in LPS-induced mice(Springer/Plenum Publishers, 2022) Avci, Sema; Kuscu, Nilay; Durkut, Begum; Kilinc, Leyla; Ustunel, Ismail; Celik-Ozenci, CilerPurpose This study aims to investigate whether indomethacin (IND) delays preterm birth by regulating the Notch pathway, Tlr receptors, and Sp-A in the placenta in lipopolysaccharide (LPS)-induced preterm labor (PTL) model. Methods CD-1 mice were distributed to the pregnant control (PC), Sham, PBS, IND (2 mg/kg; i.p.), LPS (25 mu g/100 mu l; intrauterine), and LPS + IND groups. The injections were performed on day 14.5 of pregnancy. Placentae were collected on day 15.5 of pregnancy, and immunohistochemical analyzes were performed. Differences in staining intensities between the Cox-1, Notch-1 (N1), Dll-1, Jagged-2 (Jag-2), Tlr-2, and Tlr-4 proteins were compared. Results Preterm labor rates were 100% and 66% (preterm delivery delayed 5 h) in the LPS and LPS + IND groups, respectively. In LPS-treated mice, a general morphological deterioration was observed in the placenta. Total placental mid-sagittal measurement was significantly reduced in the LPS-treated group, while it was similar to the PC group in the LPS + IND group. Cox-1 expression in the LZ increased, and Sp-A expression decreased after LPS injection, and IND administration diminished this increase. N1 expression increased in the labyrinth zone (LZ) and the junctional zone (JZ). Dll-1 and Jag-2 expression increased in the JZ after LPS injection (p < 0.0001). IND administration diminished Tlr-2 expression in the LZ and Tlr-4 expression in the JZ after LPS injection. Conclusion In conclusion, PG (prostaglandin) inhibition may alter Notch signaling, Tlr, and Sp-A protein expression and may be associated with delayed labor in LPS-induced mice.Öğe Decreased IL-33 Expression in the Cervix in LPS-Induced Preterm Birth and the Potential Role of Mast Cells: A Murine Model(Wiley, 2025) Avci, Sema; Celik-Ozenci, Ciler; Kuscu, Nilay; Bektas, Nayce IlaydaProblem: In order to gain a deeper understanding of the mechanisms underlying LPS-mediated preterm birth, it is crucial to investigate the relationship between preterm birth and mast cells (MCs). Moreover, the role of antihistamines in inflammatory processes during pregnancy remains incompletely understood. Method of Study: CD-1 female mice were administered intrauterine lipopolysaccharide (LPS) via midline laparotomy to establish an inflammation-induced preterm birth model. The experimental groups (n = 6 per group) were formed as Nonpregnant and pregnant control, Sham, PBS, LPS, Cetirizine (CET) control, and two CET treatment groups (CET 10 mg/kg-low dose, and CET 20 mg/kg-high dose with LPS administration). Tissue samples were analyzed using immunohistochemistry and Western blot techniques. Results: Our findings suggest that MCs play a significant role in preterm birth, with LPS administration inducing MC dysfunction in the reproductive tract during pregnancy. Additionally, high doses of CET may support inflammatory responses. A particularly notable result was the reduction in interleukin-33 (IL-33) expression in the cervix during LPS-induced preterm birth. This suggests that IL-33 may serve as a potential biomarker for preterm birth in the cervix. Conclusions: The effects of CET during LPS-mediated preterm birth appear to be dose-dependent, warranting further exploration of their role in this context.Öğe INDOMETHACIN CAN PROTECT PLACENTAL INFLAMMATION AND DELAY PRETERM BIRTH IN THE LPS-INDUCED PRETERM DELIVERY MODEL.(Elsevier Science Inc, 2021) Avci, Sema; Kuscu, Nilay; Durkut, Begum; Kilinc, Leyla; Ustunel, Ismail; Celik-Ozenci, Ciler[Abstract Not Available]
