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Uteroplacental

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https://www.readbyqxmd.com/read/29209071/inhaled-nicotine-equivalent-to-cigarette-smoking-disrupts-systemic-and-uterine-hemodynamics-and-induces-cardiac-arrhythmia-in-pregnant-rats
#1
Xuesi M Shao, Héctor E López-Valdés, Jing Liang, Jack L Feldman
Maternal smoking with obligatory nicotine inhalation is associated with preterm delivery, low birth weight, fetal growth retardation and developmental defects. We tested the hypothesis that cigarette smoking-relevant nicotine inhalation during pregnancy impairs cardiovascular function and uterine hemodynamics with consequential fetal ischemia. Pregnant rats exposed to episodic inhaled nicotine via a novel lung alveolar region-targeted aerosol method produced nicotine pharmacokinetics resembling cigarette smoking in humans...
December 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29208172/investigation-of-role-of-vascular-endothelial-growth-factor-annexin-a5-and-apelin-by-immunohistochemistry-method-in-placenta-of-preeclampsia-patients
#2
Nese Colcimen, Gülay Bulut, Ozlem Ergul Erkec, Murat Cetin Ragbetli
Preeclampsia is a disease characterized by hypertension and proteinuria occurred after 20 weeks of gestation. Preeclampsia is a major cause of maternal and fetal morbidity and mortality.  The pathophysiological mechanism of preeclampsia is not known exactly yet. Preeclampsia endothelial cell dysfunction, associated with inadequate trophoblastic invasion is characterized by abnormal placentation. Vascular endothelial growth factor (VEGF) according to is an angiogenic cytokine, Annexin A5 is among endogenous peptides are both expressed from placental trophoblasts and Apelin is a multifunctional peptide and expressed by placental trophoblasts and endothelial cells...
November 30, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/29196995/epigenetics-and-preeclampsia-programming-of-future-outcomes
#3
Alberto Borges Peixoto, Liliam Cristine Rolo, Luciano Marcondes Machado Nardozza, Edward Araujo Júnior
Pregnancy is known to induce rapid, progressive, and substantial changes to the cardiovascular system, ultimately facilitating successful pregnancy outcomes. Women who develop hypertensive disorders during pregnancy are considered to have "failed" the cardiovascular stress test of pregnancy and likely represent a subpopulation with inadequate cardiovascular accommodation. Preeclampsia is a serious complication with a myriad of manifestations in both mother and offspring. This pregnancy syndrome is a polygenic disease and has now been linked to a greater incidence of cardiovascular disease...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29187760/the-exit-ex-utero-intrapartum-treatment-procedure-from-the-paediatric-ent-perspective
#4
B Pucher, J Szydlowski, K Jonczyk-Potoczna, J Sroczynski
The main principle of the EXIT procedure is to maintain uteroplacental circulation with neonatal anaesthesia by controlled uterine hypotonia. This enables securing the foetal airways and decompress or resect large neck and mediastinal foetal masses. The authors present their experience with use of the EXIT procedure in 7 foetuses in whom evaluation and management of the airways were performed. In 4 patients, the neck mass was surgically removed in the neonatal period, in 1 the propranolol treatment was introduced...
November 30, 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/29184859/risk-factors-for-massive-postpartum-bleeding-in-pregnancies-in-which-incomplete-placenta-previa-are-located-on-the-posterior-uterine-wall
#5
Hyun Jung Lee, Young Jai Lee, Eun Hee Ahn, Hyeon Chul Kim, Sang Hee Jung, Sung Woon Chang, Ji Yeon Lee
Objective: To identify factors associated with massive postpartum bleeding in pregnancies complicated by incomplete placenta previa located on the posterior uterine wall. Methods: A retrospective case-control study was performed. We identified 210 healthy singleton pregnancies with incomplete placenta previa located on the posterior uterine wall, who underwent elective or emergency cesarean section after 24 weeks of gestation between January 2006 and April 2016...
November 2017: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/29181841/epidural-therapy-for-the-treatment-of-severe-pre-eclampsia-in-non-labouring-women
#6
REVIEW
Amita Ray, Sujoy Ray
BACKGROUND: Pre-eclampsia is a pregnancy-specific multi-organ disorder, which is characterised by hypertension and multisystem organ involvement and which has significant maternal and fetal morbidity and mortality. Failure of the placental vascular remodelling and reduced uteroplacental flow form the etiopathological basis of pre-eclampsia. There are several established therapies for pre-eclampsia including antihypertensives and anticonvulsants. Most of these therapies aim at controlling the blood pressure or preventing complications of elevated blood pressure, or both...
November 28, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29176779/maternal-fetal-rejection-reactions-are-unconstrained-in-preeclamptic-women
#7
Tina A Nguyen, Daniel A Kahn, Andrea I Loewendorf
The risk factors for preeclampsia, extremes of maternal age, changing paternity, concomitant maternal autoimmunity, and/or birth intervals greater than 5 years, suggest an underlying immunopathology. We used peripheral blood and lymphocytes from the UteroPlacental Interface (UPI) of 3rd trimester healthy pregnant women in multicolor flow cytometry-and in vitro suppression assays. The major end-point was the characterization of activation markers, and potential effector functions of different CD4-and CD8 subsets as well as T regulatory cells (Treg)...
2017: PloS One
https://www.readbyqxmd.com/read/29171153/gene-expression-and-delayed-nephrogenesis-in-the-growth-restricted-rat-fetus-and-neonate
#8
EDITORIAL
A M Carter
In this issue of Acta Physiologica, Cuffe et al. [1] explore the molecular mechanisms behind impaired nephrogenesis in a rat model of uteroplacental insufficiency and fetal growth restriction. Nephron development was delayed after growth restriction, continuing late into the postnatal period, and this was reflected in increased abundance of branching morphogenesis genes a week after birth. This article is protected by copyright. All rights reserved.
November 24, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/29136193/early-first-trimester-uteroplacental-flow-and-the-progressive-disintegration-of-spiral-artery-plugs-new-insights-from-contrast-enhanced-ultrasound-and-tissue-histopathology
#9
V H J Roberts, T K Morgan, P Bednarek, M Morita, G J Burton, J O Lo, A E Frias
STUDY QUESTION: Does the use of a vascular contrast agent facilitate earlier detection of maternal flow to the placental intervillous space (IVS) in the first trimester of pregnancy? SUMMARY ANSWER: Microvascular filling of the IVS was demonstrated by contrast-enhanced ultrasound from 6 weeks of gestation onwards, earlier than previously believed. WHAT IS KNOWN ALREADY: During placental establishment and remodeling of maternal spiral arteries, endovascular trophoblast cells invade and accumulate in the lumen of these vessels to form 'trophoblast plugs'...
November 10, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29123430/the-use-of-invos%C3%A2-somatic-oximetry-to-measure-variations-in-placental-tissue-oxygenation-in-laboring-healthy-term-parturients-with-epidural-analgesia-an-observational-study
#10
Christian Loubert, Mélissa Ouellette, Valérie Zaphiratos, Issam Tanoubi
Purpose: Near-infrared spectroscopy provides a non-invasive continuous real-time monitoring of tissue oxygen saturation. As uterine contractions during labor may be associated with a transient uteroplacental hypoperfusion, this prospective, observational study investigates the ability of near-infrared spectroscopy to detect variation in uteroplacental oximetry during uterine contractions. Patients and methods: Four Invos™ oximetry probes (Medtronic(®), Minneapolis, MN, USA) per subjects were applied on the placental surface (PLA), the abdomen (MYO), the forearm (ARM) and the leg (LEG), of twenty healthy laboring parturients with epidural analgesia...
2017: Medical Devices: Evidence and Research
https://www.readbyqxmd.com/read/29113124/role-of-placental-vdr-expression-and-function-in-common-late-pregnancy-disorders
#11
REVIEW
Julia Knabl, Aurelia Vattai, Yao Ye, Julia Jueckstock, Stefan Hutter, Franz Kainer, Sven Mahner, Udo Jeschke
Vitamin D, besides its classical role in bone metabolism, plays a distinct role in multiple pathways of the feto-maternal unit. Calcitriol is the major active ligand of the nuclear vitamin D receptor (VDR). The vitamin D receptor (VDR) is expressed in different uteroplacental parts and exerts a variety of functions in physiologic pregnancy. It regulates decidualisation and implantation, influences hormone secretion and placental immune modulations. This review highlights the role of the vitamin D receptor in physiologic and disturbed pregnancy, as preeclampsia, fetal growth restriction, gestational diabetes and preterm birth...
November 6, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29109771/selective-targeting-of-a-novel-vasodilator-to-the-uterine-vasculature-to-treat-impaired-uteroplacental-perfusion-in-pregnancy
#12
Natalie Cureton, Iana Korotkova, Bernadette Baker, Susan Greenwood, Mark Wareing, Venkata R Kotamraju, Tambet Teesalu, Francesco Cellesi, Nicola Tirelli, Erkki Ruoslahti, John D Aplin, Lynda K Harris
Fetal growth restriction (FGR) in pregnancy is commonly caused by impaired uteroplacental blood flow. Vasodilators enhance uteroplacental perfusion and fetal growth in humans and animal models; however, detrimental maternal and fetal side effects have been reported. We hypothesised that targeted uteroplacental delivery of a vasodilator would enhance drug efficacy and reduce the risks associated with drug administration in pregnancy. Phage screening identified novel peptides that selectively accumulated in the uteroplacental vasculature of pregnant mice...
2017: Theranostics
https://www.readbyqxmd.com/read/29108050/the-effects-of-maternal-nutrition-on-the-messenger-ribonucleic-acid-expression-of-neutral-and-acidic-amino-acid-transporters-in-bovine-uteroplacental-tissues-from-day-sixteen-to-fifty-of-gestation
#13
N P Greseth, M S Crouse, K J McLean, M R Crosswhite, N Negrin Pereira, C R Dahlen, P P Borowicz, L P Reynolds, A K Ward, B W Neville, J S Caton
We hypothesized that both day of gestation and maternal nutrition would alter the relative mRNA expression of neutral and acid AA transporters , , , , and . Crossbred Angus heifers ( = 49) were synchronized, bred via AI, assigned to nutritional treatment (100% of NRC requirements for 0.45 kg/d gain [control heifers {CON}] and 60% of CON [restricted heifers {RES}]), and ovariohysterectomized on d 16, 34, or 50 of gestation ( = 6 to 9/d). Nonbred, nonpregnant (NB-NP) controls were ovariohysterectomized on d 16 of the estrous cycle ( = 6) after synchronization...
October 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/29105381/early-gestational-hypoxia-and-adverse-developmental-outcomes
#14
REVIEW
Helen E Ritchie, Diana J Oakes, Debra Kennedy, Jaimie W Polson
Hypoxia is a normal and essential part of embryonic development. However, this state may leave the embryo vulnerable to damage when oxygen supply is disturbed. Embryofetal response to hypoxia is dependent on duration and depth of hypoxia, as well as developmental stage. Early postimplantation rat embryos were resilient to hypoxia, with many surviving up to 1.5 hr of uterine clamping, while most mid-gestation embryos were dead after 1 hour of clamping. Survivors were small and many had a range of defects, principally terminal transverse limb reduction defects...
October 16, 2017: Birth Defects Research
https://www.readbyqxmd.com/read/29097590/molecular-and-cellular-underpinnings-of-normal-and-abnormal-human-placental-blood-flow
#15
Yingchun Li, Ramón A Lorca, Emily J Su
Abnormal placental function is well-established as a major cause for poor pregnancy outcome. Placental blood flow within the maternal uteroplacental compartment, the fetoplacental circulation, or both, is a vital factor in mediating placental function. Impairment in flow in either or both vasculatures is a significant risk factor for adverse pregnancy outcome, potentially impacting maternal well-being, affecting immediate neonatal health, and even influencing the long-term health of the infant. Much remains unknown regarding the mechanistic underpinnings of proper placental blood flow...
November 2, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29067758/scoring-model-to-predict-massive-post-partum-bleeding-in-pregnancies-with-placenta-previa-a-retrospective-cohort-study
#16
Ji Yeon Lee, Eun Hee Ahn, Sukho Kang, Myung Jin Moon, Sang Hee Jung, Sung Woon Chang, Hee Young Cho
AIM: We aimed to identify factors associated with massive post-partum bleeding in pregnancies with placenta previa and to establish a scoring model to predict post-partum severe bleeding. METHODS: A retrospective cohort study was performed in 506 healthy singleton pregnancies with placenta previa from 2006 to 2016. Cases with intraoperative blood loss (≥2000 mL), packed red blood cells transfusion (≥4), uterine artery embolization, or hysterectomy were defined as massive bleeding...
October 25, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/29047216/uteroplacental-insufficiency-in-rats-induces-renal-apoptosis-and-delays-nephrogenesis-completion
#17
James Sm Cuffe, Jessica F Briffa, Shannyn Rosser, Andrew L Siebel, Tania Romano, Deanne H Hryciw, Mary E Wlodek, Karen M Moritz
AIM: Uteroplacental insufficiency in rats reduces nephron endowment, leptin concentrations and programs cardiorenal disease in offspring. Cross-fostering growth restricted (Restricted) offspring onto a mother with normal lactation restores leptin concentrations and nephron endowment. This study aimed to determine if the reduced nephron endowment in Restricted offspring is due to delayed glomerular formation and dysregulation of renal genes regulating branching morphogenesis, apoptosis or leptin signalling...
October 19, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/29044348/sonographically-abnormal-placenta-an-association-with-an-increased-risk-poor-pregnancy-outcomes
#18
W D Wan Masliza, M Y Bajuri, M R Hassan, N M Naim, A Shuhaila, S Das
BACKGROUND: The placenta is a most interesting but unfortunately often ignored and misunderstood organ. Placental abnormalities, therefore, can be an "early warning system" for fetal problems. A complete prenatal sonographic examination of the placenta is an essential component as its abnormalities can have a direct effect on fetal or maternal outcomes, obstetrical management and future fertility. OBJECTIVE: To determine whether any association exists between the finding of an increased thickness of placenta, abnormal placenta shape, placental calcification, placental lake and abnormal cord insertion site at 20-22 and 30-32 weeks gestation with an increased risk of uteroplacental complications or a poor pregnancy outcome...
September 2017: La Clinica Terapeutica
https://www.readbyqxmd.com/read/29031540/maternal-uterine-artery-vegf-gene-therapy-for-treatment-of-intrauterine-growth-restriction
#19
Anna L David
Intrauterine growth restriction (IUGR) is a serious pregnancy complication affecting approximately 8% of all pregnancies. The aetiology is believed to be insufficient maternal uteroplacental perfusion which prevents adequate nutrient and oxygen availability for the fetus. There is no treatment that can improve uteroplacental perfusion and thereby increase fetal growth in the uterus. Maternal uterine artery gene therapy presents a promising treatment strategy for IUGR, with the use of adenoviral vectors encoding for proteins such as Vascular Endothelial Growth Factor (VEGF) demonstrating improvements in fetal growth and neonatal outcome in preclinical studies...
November 2017: Placenta
https://www.readbyqxmd.com/read/29020789/-the-role-of-maternal-imunity-and-woman%C3%A2-s-microbiome-in-the-pathogenesis-of-preterm-labor
#20
M Koucký, K Malíčková, J Hrdý, A Černý, H Hrbáčková, P Šimják, A Pařízek
OBJECTIVE: To summarize available data concerning the role of maternal imunity and woman´s microbiome in the pathogenesis of preterm labor and their use in clinical practice. SETTING: Department of Obstetrics and Gynecology od the First Faculty of Medicine, Charles University in Prague, and General Teaching Hospital. DESIGN: Review article. METHODS: Compilation od published data from scientific literature. CONCLUSION: Preterm labor complicates approximately 10% of all pregnancies and represents a serious medical, social and economic problem...
2017: Ceská Gynekologie
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