Interstitial Pregnancy in the Third Trimester with Severe Preeclampsia: A Case Report and Literature Review

An interstitial pregnancy that continues beyond the second trimester is a rare phenomenon. We report a patient with an interstitial pregnancy undiagnosed until the third trimester. A multiparous woman was referred to us because of preeclampsia at 26 weeks of gestation. The placental position was the right fundus, and color Doppler ultrasound revealed myometrial thinning and subplacental hypervascularity, leading to a suspicion of placenta accreta spectrum (PAS). Emergency cesarean section was performed at 281/7 weeks of gestation due to severe preeclampsia. The right tubal horn to the isthmus of the fallopian tube bulged with placental adhesion and a part of the tube had ruptured, with the omentum adhering to the ruptured part. Interstitial and tubal isthmic pregnancy with uterine rupture was diagnosed

Studies on Adhesion Properties of Shellac to Bovine Enamel

Though an attempt to apply a natural resin shellac in the dental field has been made in recent years, almost no study have concerned its adhesive strength to the tooth surface or its persistency. In the present study, therefore, the adhesive strength of shellac to the enamel surface, the influence of etching treatment on the adhesive strength and possible changes in the adhesive strength following thermal loading due to thermal cycle were examined by means of compressive shear bond strength test. By using a test material composed of shellac in alcohol solution and bovine extracted tooth, the adhesive strength of shellac at varied concentrations was examined with the results as below. The adhesive strength with no etching treatment was about 5MPa irrespective of the shellac concentration used and no significant difference was observed between the examined groups. When an etching treatment was applied, however, the adhesive strength significantly increased in almost all experimental groups with the maximum value of 13.7±1.5MPa. Though a decreased adhesive strength was observed in all groups examined after thermal loading due to thermal cycle, the rate of decrease however tended to be relatively small in experimental groups at a shellac concentration ranging 0.1 to 1%. In particular, the rate of decrease was the smallest in 0.1% shellac group(11.4%) and the adhesive strength of 10.6 1.9MPa was maintained even after thermal cycle. Based on the above evidences, an practical adhesive strength was suggested to be successfully maintained to some extent of period when it is applied to human oral cavity

Moderate Hypoxia Down-Regulates Interleukin-6 Secretion and TLR4 Expression in Human Sw.71 Placental Cells

Background/Aims: The placenta is a vital organ for pregnancy. Many in vitro placental experiments are conducted under 21% O2; however, O2 tension could influence cellular functions, including cytokine secretion. We investigated the effects of oxygen tension between moderate hypoxia (5% O2) and normoxia (21% O2) by testing the hypothesis that moderate hypoxia regulates cellular phenotypes differently from normoxia in human trophoblast cells. Methods and Results: Sw.71 trophoblast cells were incubated under normoxic or moderately hypoxic conditions. Cells were also treated with lipopolysaccharide (LPS) as a Toll-like receptor 4 (TLR4) ligand inducing inflammation. Interleukin-6 (IL-6) as an inflammatory cytokine was determined, and TLR4, hypoxia-induced factor-1α (HIF1α), and reactive oxygen species (ROS) production were detected. Moderate hypoxia increased HIF1α expression and cell proliferation and acted by two different mechanisms to decrease IL-6 secretion compared with normoxia: it limits the TLR4 expression and ROS production. Treatment with cobalt chloride as an HIF1 activator inhibited IL-6 secretion and TLR4 expression; this effect was reversed on treatment with PX-12 as an HIF1 suppressor. Conclusion: IL-6 secretion, TLR4 expression, and ROS production, classical markers of inflammation, are down-regulated by moderate hypoxia, and HIF1α and ROS have a potential to regulate these responses in human trophoblast cells