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https://www.readbyqxmd.com/read/28916522/viral-infection-sensitizes-human-fetal-membranes-to-bacterial-lipopolysaccharide-by-mertk-inhibition-and-inflammasome-activation
#1
Sarah N Cross, Julie A Potter, Paulomi Aldo, Ja Young Kwon, Mary Pitruzzello, Mancy Tong, Seth Guller, Carla V Rothlin, Gil Mor, Vikki M Abrahams
Chorioamnionitis, premature rupture of fetal membranes (FMs), and subsequent preterm birth are associated with local infection and inflammation, particularly IL-1β production. Although bacterial infections are commonly identified, other microorganisms may play a role in the pathogenesis. Because viral pandemics, such as influenza, Ebola, and Zika, are becoming more common, and pregnant women are at increased risk for associated complications, this study evaluated the impact that viral infection had on human FM innate immune responses...
September 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28915355/thiamin-deficiency-on-fetal-brain-development-with-and-without-prenatal-alcohol-exposure
#2
Olena Kloss, Michael Eskin, Miyoung Suh
Adequate thiamin levels are crucial for optimal health, through maintenance of homeostasis and viability of metabolic enzymes, which require thiamine as a co-factor. Thiamin deficiency occurs during pregnancy when dietary intake is inadequate or excessive alcohol is consumed. Thiamin deficiency leads to brain dysfunction due to its involvement in synthesis of myelin and neurotransmitters (eg. acetylcholine, γ-aminobutyric acid, glutamate), and increases oxidative stress by decreasing the production of reducing agents...
September 15, 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28914670/endometrial-stromal-neoplasm-in-the-placenta-report-of-a-case-and-review-of-the-literature
#3
Debra S Heller, Fadi Hatem
Placental neoplasms involving the fetal membranes are exceptionally rare. In leiomyomas and endometrial stromal neoplasms, a uterine origin for nodules in the membranes is also a possibility. We present a case of an incidental endometrial stromal nodule found in the decidua of the free membranes and review the literature.
September 13, 2017: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/28913146/fetomaternal-outcomes-in-pregnant-women-with-hepatitis-e-infection-still-an-important-fetomaternal-killer-with-an-unresolved-mystery-of-increased-virulence-in-pregnancy
#4
Namrata Kumar, Vinita Das, Anjoo Agarwal, Amita Pandey, Smriti Agrawal
OBJECTIVE: Hepatitis is a prevalent infection in developing countries. While hepatitis B and C are deepening their roots in the developed world, hepatitis A and E are common in the developing world. The uniqueness of hepatitis is in its transformation from a relatively self-limiting disease in the non-pregnant state, to a highly virulent disease during pregnancy. MATERIALS AND METHODS: This retrospective observational study was conducted in the Department of Obstetrics and Gynecology, King George's Medical University, Lucknow, for a period of six months from June 2016 to November 2016 [probably during an endemic peak of hepatitis E virus (HEV)] to observe the clinical outcomes in HEV-infected pregnant women...
June 2017: Turk J Obstet Gynecol
https://www.readbyqxmd.com/read/28912192/mechanical-cervical-ripening-for-women-with-prolongedpregnancies-magpop-protocol-for-a-randomised-controlled-trial-of-a-silicone-double-balloon-catheter-versus-the-propess-system-for-the-slow-release-of-dinoprostone-for-cervical-ripening-of-prolonged-pregnancies
#5
Caroline Diguisto, Amélie Le Gouge, Bruno Giraudeau, Franck Perrotin
INTRODUCTION: Induction of labour for prolonged pregnancies (PP) when the cervix is unfavourable is a challenging situation. Cervical ripening by pharmacological or mechanical techniques before oxytocin administration is used to increase the likelihood of vaginal delivery. Both techniques are equally effective in achieving vaginal delivery but excessive uterine activity, which induces fetal heart rate (FHR) anomalies, is more frequent after the pharmacological intervention. We hypothesised that mechanical cervical ripening could reduce the caesarean rate for non-reassuring FHR especially in PP where fetuses are already susceptible to this...
September 14, 2017: BMJ Open
https://www.readbyqxmd.com/read/28910784/fetal-surgery-for-myelomeningocele-a-systematic-review-and-meta-analysis-of-outcomes-in-fetoscopic-versus-open-repair
#6
Sandra K Kabagambe, Guy W Jensen, Yue Julia Chen, Melissa A Vanover, Diana L Farmer
BACKGROUND/OBJECTIVES: The Management of Myelomeningocele (MMC) Study (MOMS) showed that prenatal repair of MMC resulted in improved neurological outcomes but was associated with high rates of obstetrical complications. This study compares outcomes of open and fetoscopic MMC repair. DATA SOURCES: PubMed and Embase studies reporting outcomes of fetal MMC repair published since the completion of the MOMS. RESULTS: We analyzed 11 studies and found no difference in mortality or the rate of shunt placement for hydrocephalus...
September 15, 2017: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/28898687/outcomes-of-mifepristone-usage-for-cervical-ripening-and-induction-of-labour-in-full-term-pregnancy-randomized-controlled-trial
#7
Oleg R Baev, Valentina P Rumyantseva, Oleg V Tysyachnyu, Olga A Kozlova, Gennady T Sukhikh
OBJECTIVE: The most commonly used approved indications for mifepristone in obstetrics include: termination of early pregnancy, cervical dilatation prior to abortion, labour induction in case of fetal death in utero. Fewer studies have been conducted on the effect of mifepristone on cervical ripening and induction of labour in term pregnancy with a live fetus. The aim of our study was to evaluate efficacy and safety of mifepristone use for cervical ripening and induction of labour versus expectant management in full-term pregnancy...
September 1, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28894161/microbial-communities-in-placentas-from-term-normal-pregnancy-exhibit-spatially-variable-profiles
#8
Lindsay A Parnell, Catherine M Briggs, Bin Cao, Omar Delannoy-Bruno, Andrew E Schrieffer, Indira U Mysorekar
The placenta is the principal organ nurturing the fetus during pregnancy and was traditionally considered to be sterile. Recent work has suggested that the placenta harbours microbial communities, however the location and possible function of these microbes remain to be confirmed and elucidated. Here, we employed genomic DNA sequencing of multiple variable (V) regions of the bacterial 16S ribosomal gene, to interrogate microbial profiles in term pregnancies, from the basal plate, which is in direct contact with maternal uterine, endothelial, and immune cells; placental villi, which are bathed in maternal blood, and fetal membranes, which encapsulate the amniotic cavity...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28893506/cytochrome-b561-copper-%C3%AE-cleaved-amyloid-precursor-protein-and-niemann-pick-c1-protein-are-involved-in-ascorbate-induced-release-and-membrane-penetration-of-heparan-sulfate-from-endosomal-s-nitrosylated-glypican-1
#9
Fang Cheng, Lars-Åke Fransson, Katrin Mani
Ascorbate-induced release of heparan sulfate from S-nitrosylated heparan sulfate proteoglycan glypican-1 takes place in endosomes. Heparan sulfate penetrates the membrane and is transported to the nucleus. This process is dependent on copper and on expression and processing of the amyloid precursor protein. It remains unclear how exogenously supplied ascorbate can generate HS-anMan in endosomes and how passage through the membrane is facilitated. Here we have examined wild-type, Alzheimer Tg2576 and amyloid precursor protein (-/-) mouse fibroblasts and human fetal and Niemann-Pick C1 fibroblasts by using deconvolution immunofluorescence microscopy, siRNA technology and [S(35)]sulfate-labeling, vesicle isolation and gel chromatography...
September 9, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28891072/stable-control-of-physiological-parameters-but-not-infection-in-preterm-lambs-maintained-on-ex-vivo-uterine-environment-therapy
#10
Yuichiro Miura, Haruo Usuda, Shimpei Watanabe, Eleanor Woodward, Masatoshi Saito, Gabrielle C Musk, Suhas G Kallapur, Shinichi Sato, Ryuta Kitanishi, Tadashi Matsuda, John P Newnham, Sarah J Stock, Matthew W Kemp
Ex vivo uterine environment (EVE) therapy is an experimental neonatal intensive care strategy wherein gas exchange is performed by membranous oxygenators attached to the umbilical vessels. Our aim was to assess the ability of a newly refined EVE system to maintain key physiological parameters in preterm lambs within optimal ranges for 48 h. EVE group; n = 6: Preterm lambs were delivered under general anesthesia at 115 ± 2 days of gestational age. Animals were submerged in a bath of artificial amniotic fluid on EVE therapy for 48 h...
September 11, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28890425/platelet-to-lymphocyte-ratio-a-new-inflammatory-marker-for-the-diagnosis-of-preterm-premature-rupture-of-membranes
#11
Erzat Toprak, Murat Bozkurt, Burcu Dinçgez Çakmak, Emel Ebru Özçimen, Musa Silahlı, Ayşe Ender Yumru, Eray Çalışkan
OBJECTIVE: Preterm premature rupture of membranes (PPROM) is closely related with maternal and fetal complications. Therefore, early diagnosis is extremely important to provide maternal and fetal well-being. Many inflammatory markers have been evaluated for their ability to diagnose membrane rupture at early stages. We aimed to investigate the relationship between the platelet-to-lymphocyte ratio (PLR) and preterm premature membrane rupture. MATERIAL AND METHODS: In this study, 121 pregnant women with PPROM and 96 age-matched pregnant women with spontaneous preterm labor who were admitted to our hospital between January 2014 and December 2015 were enrolled...
September 1, 2017: Journal of the Turkish German Gynecological Association
https://www.readbyqxmd.com/read/28883820/decidual-macrophage-functional-polarization-during-abnormal-pregnancy-due-to-toxoplasma-gondii-role-for-lilrb4
#12
Zhidan Li, Mingdong Zhao, Teng Li, Jing Zheng, Xianbing Liu, Yuzhu Jiang, Haixia Zhang, Xuemei Hu
During gestation, Toxoplasma gondii infection produces a series of complications including stillbirths, abortions, and congenital malformations. The inhibitory receptor, LILRB4, which is mainly expressed by professional antigen-presenting cells (especially macrophages and dendritic cells) may play an important immune-regulatory role at the maternal-fetal interface. To assess the role of LILRB4 during T. gondii infection, LILRB4(-/-) and T. gondii infected pregnant mouse models were established. Further, human primary-decidual macrophages were treated with anti-LILRB4 neutralizing antibody and then infected with T...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28878297/role-of-nf-%C3%AE%C2%BAb-gata3-in-the-inhibition-of-lysyl-oxidase-by-il-1%C3%AE-in-human-amnion-fibroblasts
#13
Chuyue Zhang, Wangsheng Wang, Chao Liu, Jiangwen Lu, Kang Sun
Preterm premature rupture of membranes (pPROM) accounts for one third of preterm births, a leading cause of neonatal death. Understanding the mechanism of membrane rupture is thus of clinical significance in the prevention of preterm birth. Parturition at both term and preterm is associated with increased abundance of proinflammatory cytokines in the fetal membranes regardless of the presence of infection, which is believed to induce rupture of membranes through activation of the matrix metalloproteinases. It remains unknown whether there are any alternative mechanisms underpinning proinflammatory cytokine-induced rupture of membranes...
September 7, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28873067/association-of-histological-chorioamnionitis-and-magnesium-sulfate-treatment-in-singleton-and-dichorionic-twin-pregnancies-with-preterm-premature-rupture-of-membranes-preliminary-observations
#14
James M O'Brien, Jacobo L Santolaya, Kristy Palomares, David Blitzer, Joaquin Santolaya-Forgas
OBJECTIVE: To evaluate the possible association between antenatal magnesium sulfate treatment with histological chorioamnionitis in patients with singleton or dichorionic twins that had preterm premature rupture of the membranes. METHODS: This was an observational study performed in patients admitted to the hospital with rupture of membranes before 34 weeks' gestation. The primary outcome was histological chorioamnionitis and the primary predictor was antenatal magnesium sulfate treatment...
September 5, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28868246/antimicrobial-properties-of-amniotic-and-chorionic-membranes-a-comparative-study-of-two-human-fetal-sacs
#15
Majid Zare-Bidaki, Sajad Sadrinia, Soheila Erfani, Ehsan Afkar, Nahid Ghanbarzade
BACKGROUND: There is evidence of antibacterial properties of human chorioamniotic layer. However, the distinctive contribution of its individual parts, amniotic and chorionic membranes, to these effects is still unknown. The aim of present study was comparison of the antibacterial effects between amniotic and chorionic membranes. METHODS: Chorioamniotic layer was removed from placenta belonging to 43 healthy mothers whose infants were delivered by caesarean section...
April 2017: Journal of Reproduction & Infertility
https://www.readbyqxmd.com/read/28864023/clinicoplacental-correlates-of-amniocyte-vacuolization-in-association-with-gastroschisis
#16
Monique E De Paepe, Quanfu Mao, Sharon Chu, Yuqi Zhang, François I Luks
INTRODUCTION/OBJECTIVES: Gastroschisis has been associated with a characteristic type of amniocyte vacuolization. In this study, we determined the frequency and clinicoplacental correlates of this apparently unique alteration of the amniotic epithelium. METHODS: We performed a retrospective clinicopathologic analysis of 74 consecutive cases of isolated gastroschisis. Placental membrane sections were reviewed for presence and extent of amniocyte vacuolization, and immunostained for adipophilin, a lipid droplet-associated protein...
September 2017: Placenta
https://www.readbyqxmd.com/read/28864019/glyburide-treatment-in-gestational-diabetes-is-associated-with-increased-placental-glucose-transporter-1-expression-and-higher-birth-weight
#17
Paula Díaz, Kris Genelyn Dimasuay, Lindsey Koele-Schmidt, Brian Jang, Linda A Barbour, Thomas Jansson, Theresa L Powell
Use of glyburide in gestational diabetes (GDM) has raised concerns about fetal and neonatal side effects, including increased birth weight. Placental nutrient transport is a key determinant of fetal growth, however the effect of glyburide on placental nutrient transporters is largely unknown. We hypothesized that glyburide treatment in GDM pregnancies is associated with increased expression of nutrient transporters in the syncytiotrophoblast plasma membranes. We collected placentas from GDM pregnancies who delivered at term and were treated with either diet modification (n = 15) or glyburide (n = 8)...
September 2017: Placenta
https://www.readbyqxmd.com/read/28864018/bovine-placentomal-heparanase-and-syndecan-expression-is-related-to-placental-maturation
#18
N Hambruch, S Kumstel, J-D Haeger, C Pfarrer
INTRODUCTION: Impaired placental maturation has been associated with retention of fetal membranes, which is a major reproductive disease in cattle. This maturation includes alterations in all tissue compartments of the placenta, specifically of epithelial and stroma cells and extracellular matrix. It is believed to be controlled by hormones, adhesion molecules and proteolytic enzymes. To investigate if the proteolytic enzyme heparanase and its substrates, the syndecans (SDCs) could be involved in the release of fetal membranes, their expression in bovine placentomes was analyzed...
September 2017: Placenta
https://www.readbyqxmd.com/read/28863997/micronized-progesterone-pretreatment-affects-the-inflammatory-response-of-human-gestational-tissues-and-the-cervix-to-lipopolysaccharide-stimulation
#19
Tai-Ho Hung, Szu-Fu Chen, Chung-Pu Wu, Meng-Jen Li, Yi-Lin Yeh, T'sang-T'ang Hsieh
INTRODUCTION: Vaginal administration of micronized progesterone (utrogestan capsule, UG) reduces the risk of preterm birth (PTB) in asymptomatic women with a sonographic short cervix at mid-trimester or with a prior history of spontaneous PTB; however, its exact mechanisms remain unclear. We hypothesized that UG limits the inflammatory processes within the gestational tissues and the cervix. METHODS: Fetal membranes and villous tissues were obtained from normal term placentas from women with cesarean delivery before labor onset...
September 2017: Placenta
https://www.readbyqxmd.com/read/28861917/feto-and-utero-placental-vascular-adaptations-to-chronic-maternal-hypoxia-in-the-mouse
#20
Lindsay S Cahill, Monique Y Rennie, Johnathan Hoggarth, Lisa X Yu, Anum Rahman, John C Kingdom, Mike Seed, Christopher K Macgowan, John G Sled
The fetus and the placenta in eutherian mammals have a unique set of compensatory mechanisms to respond to several pregnancy complications including chronic maternal hypoxia. This study examined the structural adaptations of the feto- and utero-placental vasculature in an experimental mouse model of chronic maternal hypoxia (11% O2 from E14.5-E17.5). While placental weights were unaffected by exposure to chronic hypoxia, using micro-computed tomography, we found a 44% decrease in the absolute feto-placental arterial vascular volume and a 30% decrease in total vessel segments in the chronic hypoxia compared to control group...
September 1, 2017: Journal of Physiology
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