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https://www.readbyqxmd.com/read/29786973/amniotic-fluid-lactic-acid-and-matrix-metalloproteinase-8-levels-at-the-time-of-fetal-surgery-for-a-spine-defect-association-with-subsequent-premature-preterm-rupture-of-membranes
#1
Antonio F Moron, Aikaterini Athanasiou, Mauricio Barbosa, Herbene J Milani, Stephanno G Sarmento, Sergio Cavalheiro, Steven S Witkin
OBJECTIVE: In utero fetal surgery to correct incomplete closure of the spinal cord lessens the extent of permanent damage but is associated with preterm premature rupture of membranes (pPROM). We determined if compounds in amniotic fluid (AF) collected at the time of surgery predicted subsequent development of pPROM. DESIGN: Prospective study. SETTING: Hospitals in Sao Paulo, Brazil. POPULATION: Twenty four consecutive pregnant women at 24-26 weeks gestation seen between February and October 2017 with a singleton pregnancy underwent in utero surgery to correct an open spinal defect in their fetus...
May 22, 2018: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29783884/roles-of-progesterone-receptor-membrane-component-1-in-oxidative-stress-induced-aging-in-chorion-cells
#2
Liping Feng, Terrence K Allen, William P Marinello, Amy P Murtha
INTRODUCTION: Oxidative stress-mediated fetal membrane cell aging is activated prematurely in preterm premature rupture of membranes (PPROMs). The mechanism of this phenomenon is largely understudied. Progesterone receptor membrane component 1 (PGRMC1) has been recognized as a potential protective component for maintaining fetal membrane integrity and healthy pregnancies. We aimed to investigate the effects of oxidative stress (represented by hydrogen peroxide [H2 O2]) on fetal membrane and chorion cell senescence, p38 mitogen-activated protein kinase (MAPK) phosphorylation, and sirtuin 3 (SIRT3) and to examine the roles of PGRMC1 in these effects...
January 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/29781742/early-prenatal-diagnosis-of-blakes-pouch-cyst-by-2d-3d-ultrasound-with-cristal-and-realistic-vue-application
#3
Gabriele Tonni, Gianpaolo Grisolia, Paolo Zampriolo, Edward Araujo Júnior, Rodrigo Ruano
INTRODUCTION: Blake's pouch cyst (BPC) represents an abnormal development of the posterior membranous area of the fetal brain. MATERIAL AND METHODS: Two- and three-dimensional ultrasound with Cristal and Realistic Vue were used to characterized the early prenatal diagnosis. RESULTS: At 9 weeks and 5 days a ballooning in the posterior fossa and resulting in an enlarged intracranial translucency (IT) was detected by 3D ultrasound using Cristal Vue in "inversion" mode and Cristal plus Realistic Vue...
May 21, 2018: Fetal and Pediatric Pathology
https://www.readbyqxmd.com/read/29771920/maternal-human-telomerase-reverse-transcriptase-variants-are-associated-with-preterm-labor-and-preterm-premature-rupture-of-membranes
#4
Caroline Marrs, Kevin Chesmore, Ramkumar Menon, Scott Williams
OBJECTIVE: Premature aging and short telomere lengths of fetal tissues are associated with spontaneous preterm labor (PTL) and preterm premature rupture of membranes (pPROM). Maintenance of telomere length is performed by the enzyme telomerase. Human telomerase reverse transcriptase (hTERT) is a subunit of telomerase, and its dysfunction affects telomere shortening. This study assessed whether maternal or fetal genetic variations in the hTERT gene are associated with PTL or pPROM. METHODS: A case (PTL or pPROM) control (term birth) genetic association study was conducted in 654 non-Hispanic white mothers (438 term, 162 PTL, 54 pPROM) and 502 non-Hispanic white newborns (346 term, 116 PTB, 40 pPROM)...
2018: PloS One
https://www.readbyqxmd.com/read/29769009/mesenchymal-stem-cell-research-in-veterinary-medicine
#5
Mudasir Bashir Gugjoo, Amarpal, Vikash Chandra, Mohd Yaqoob Wani, Kuldeep Dhama, Gutulla Taru Sharma
BACKGROUND: The stem cells due to their unique characteristic features like self-renewal, multiplication, immuno-modulation and differentiation, are seen and hoped to bring new horizons in the field of biology, in general and medicine, in particular. OBJECTIVE: Among various stem cell types, currently mesenchymal stem cells (MSCs) are extensively studied in regenerative medicine owing to their readily available sources, easy harvesting and ability to differentiate both into mesodermal as well as non-mesodermal tissues with little associated ethical issues...
May 16, 2018: Current Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29765697/analytical-model-of-the-feto-placental-vascular-system-consideration-of-placental-oxygen-transport
#6
Parisa Mirbod
The placenta is a transient vascular organ that enables nutrients and blood gases to be exchanged between fetal and maternal circulations. Herein, the structure and oxygen diffusion across the trophoblast membrane between the fetal and maternal red blood cells in the feto-placental vasculature system in both human and mouse placentas are presented together as a functional unit. Previous models have claimed that the most efficient fetal blood flow relies upon structures containing a number of 'conductive' symmetrical branches, offering a path of minimal resistance that maximizes blood flow to the terminal villi, where oxygen diffusion occurs...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29759046/classification-of-preterm-birth-with-placental-correlates
#7
Karen M Chisholm, Mary E Norton, Anna A Penn, Amy Heerema-McKenney
Premature birth lacks a widely accepted classification that unites features of the clinical presentation with placental pathology. To further explore associations between the clinical categories of preterm birth and placental histology, 109 infants with gestational age <34 weeks and birth weight <2000 g were selected and, based on electronic records, were classified into preterm birth categories of preterm labor, prelabor premature rupture of membranes, preeclampsia, indicated preterm birth for maternal factors (other than preeclampsia), indicated preterm birth for fetal factors, and the clinical diagnosis of abruption...
January 1, 2018: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/29757275/isolation-of-primary-human-decidual-cells-from-the-fetal-membranes-of-term-placentae
#8
Tali Farine, Michael Parsons, Stephen Lye, Oksana Shynlova
The decidua, also known as the pregnant endometrium, is a critically important reproductive tissue. Decidual cells, comprised mainly of decidualized stromal cells and immune cells, are responsible for the secretion of hormonal and inflammatory factors which are critical for successful blastocyst implantation, placental development and play a role in the initiation of labor at term and preterm. Many pregnancy complications can arise from perturbations of a fine balance of different cell populations comprising decidua...
April 30, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29756666/abnormal-lymphatic-vessel-development-is-associated-with-decreased-decidual-regulatory-t-cells-in-severe-preeclampsia
#9
Yun Ji Jung, Yejin Park, Hyun-Soo Kim, Hwa Jin Lee, Yoo-Na Kim, JoonHo Lee, Young-Han Kim, Yong-Sun Maeng, Ja-Young Kwon
PROBLEM: The lymphatic vasculature controls leukocytes trafficking and limits the adaptive immune response. In previous models of preeclampsia (PE), defective immune function caused by disruption of lymphangiogenesis was shown to be involved in the disease pathophysiology. Especially, the dysfunction of regulatory T cells (Treg) at the maternal-fetal interface may be one of the causes of severe PE. In particular, activation of Tregs to obtain immune tolerance requires adequate antigen presentation through the lymphatic system...
May 14, 2018: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/29756067/concurrent-intraoperative-uterine-rupture-and-placenta-accreta-do-preoperative-chronic-hypertension-preterm-premature-rupture-of-membranes-chorioamnionitis-and-placental-abruption-provide-warning-to-this-rare-occurrence
#10
M Anthony Cometa, Scott M Wasilko, Adam L Wendling
Uterine and placental pathology can be a major cause of morbidity and mortality in the parturient and infant. When presenting alone, placental abruption, uterine rupture, or placenta accreta can result in significant peripartum hemorrhage, requiring aggressive surgical and anesthetic management; however, the presence of multiple concurrent uterine and placental pathologies can result in significant morbidity and mortality. We present the anesthetic management of a parturient who underwent an urgent cesarean delivery for non-reassuring fetal tracing in the setting of chronic hypertension, preterm premature rupture of membranes, and chorioamnionitis who was subsequently found to have placental abruption, uterine rupture, and placenta accreta...
April 2018: Romanian Journal of Anaesthesia and Intensive Care
https://www.readbyqxmd.com/read/29751216/pellino-1-is-a-novel-regulator-of-tnf-and-tlr-signalling-in-human-myometrial-and-amnion-cells
#11
Ratana Lim, Gillian Barker, Martha Lappas
Preterm birth is the primary cause of neonatal deaths and morbidities. Pathological processes causally linked to preterm birth are inflammation and infection. Pellino-1 (Peli1) has previously been found to regulate the inflammatory response in non-gestational tissues in response to toll-like receptor (TLR) ligands and pro-inflammatory cytokines. The aims of this study were to determine the effect of labor on Peli1 expression in myometrium and fetal membranes, and the effect of Peli1 silencing by siRNA (siPELI1) on the production of pro-inflammatory and pro-labor mediators...
April 14, 2018: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/29742660/management-of-labor-and-delivery-after-fetoscopic-repair-of-an-open-neural-tube-defect
#12
Jaden R Kohn, Vibha Rao, Allison A Sellner, Dina Sharhan, Jimmy Espinoza, Alireza A Shamshirsaz, William E Whitehead, Michael A Belfort, Magdalena Sanz Cortes
OBJECTIVE: To report labor, delivery, and neonatal outcomes in a cohort of women delivering neonates who had undergone fetoscopic neural tube defect repair. METHODS: We conducted a retrospective cohort study from April 2014 to January 2018. All patients met Management of Myelomeningocele Study eligibility criteria. We included patients with completed second-trimester fetoscopic neural tube defect repair (laparotomy, uterine exteriorization, and minimally invasive access through two or three uterine ports) followed by standardized management of labor and delivery at our institution...
May 7, 2018: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29740832/perinatal-outcomes-of-single-fetal-survivor-after-fetal-intervention-for-complicated-monochorionic-twins
#13
Mallory Hoffman, Mounira Habli, Roopali Donepudi, Noemi Boring, Anthony Johnson, Kenneth J Moise, Ramesha Papanna
OBJECTIVE: To compare perinatal outcomes between acute single fetal demise following FLP to planned selective reduction (SR) in complicated monochorionic (MC) twin pregnancies. METHODS: This was a secondary analysis of prospectively collected data in complicated MC twin pregnancies from two fetal centers from 2011-2016. Group 1 included women undergoing FLP for TTTS who experienced a single fetal demise within 24 hours of the procedure. Group 2 consisted of women undergoing planned SR with TTTS, and Group 3 SR for indications other than TTTS...
May 9, 2018: Prenatal Diagnosis
https://www.readbyqxmd.com/read/29738787/experimental-challenges-regarding-the-in-vitro-investigation-of-the-nanoparticle-biocorona-in-disease-states
#14
Sherleen Xue-Fu Adamson, Zhoumeng Lin, Ran Chen, Lisa Kobos, Jonathan Shannahan
Toxicological evaluation of nanoparticles (NPs) requires the utilization of in vitro techniques due to their number and diverse properties. Cell culture systems are often lacking in their ability to perform comparative toxicity assessment due to dosimetry issues and capacity to simulate in vivo environments. Upon encountering a physiological environment, NPs become coated with biomolecules forming a biocorona (BC), influencing function, biodistribution, and toxicity. Disease-induced alterations in the biological milieu can alter BC formation...
May 5, 2018: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/29736806/amniotic-membrane-seeded-fetal-fibroblasts-as-skin-substitute-for-wound-regeneration
#15
Ehsan Taghiabadi, Bahareh Beiki, Nasser Aghdami, Amir Bajouri
Various natural and synthetic biomaterials have been applied as skin substitutes for regenerating damaged skin. Here, we describe a straightforward method for fabrication of a tissue-engineered skin substitute by seeding human fetal fibroblasts on acellular human amniotic membrane (HAM). Fetal fibroblasts are achieved from the skin of normal and non-macerated fetus of 11-14 weeks old after spontaneous pregnancy termination. Acellular HAM is obtained by separation of the outer membrane of the chorion and removing its epithelial cells...
May 8, 2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29727918/the-inoss-study-of-uterine-rupture-a-descriptive-multi-country-population-based-study
#16
Griet Vandenberghe, Kitty Bloemenkamp, Silvia Berlage, Lotte Colmorn, Catherine Deneux-Tharaux, Mika Gissler, Marian Knight, Jens Langhoff-Roos, Pelle G Lindqvist, Willi Oberaigner, Jos Van Roosmalen, Joost Zwart, Kristien Roelens
OBJECTIVE: International comparison of complete uterine rupture. DESIGN: Descriptive multi-country population-based study. SETTING: International. POPULATION: International Network of Obstetric Survey Systems (INOSS). METHODS: We merged individual data, collected prospectively in nine population-based studies, of women with complete uterine rupture, defined as complete disruption of the uterine muscle and the uterine serosa, regardless of symptoms and rupture of fetal membranes...
May 4, 2018: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29727785/gender-and-preterm-birth-is-male-fetal-gender-a-clinically-important-risk-factor-for-preterm-birth-in-high-risk-women
#17
P J Teoh, A Ridout, P Seed, R M Tribe, A H Shennan
Gender differences in several adverse pregnancy outcomes have been described, including preterm labour and delivery. In the low risk population, the male fetus is at significantly higher risk of spontaneous preterm birth. OBJECTIVES: Our objective was to examine the risk effect of fetal gender on pregnant women at higher risk of preterm birth, and therefore its potential impact on targeting management. STUDY DESIGN: This was an analysis of prospectively collected data from a dedicated inner-city Prematurity Surveillance Clinic over a sixteen-year period...
April 22, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29727248/quantitative-fetal-fibronectin-and-cervical-length-in-symptomatic-women-results-from-a-prospective-blinded-cohort-study
#18
Lisa D Levine, Katheryne L Downes, Julie A Romero, Hope Pappas, Michal A Elovitz
OBJECTIVES: Our objectives were to determine whether quantitative fetal fibronectin (fFN) and cervical length (CL) screening can be used alone or in combination as prognostic tests to identify symptomatic women at highest or lowest risk for spontaneous preterm birth (sPTB). METHODS: A prospective, blinded cohort study of women presenting with a singleton gestation to our triage unit between 22-33w6d with preterm labor symptoms was performed. Women with ruptured membranes, moderate/severe bleeding, and dilation > 2 cm were excluded...
May 4, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29726290/alpha-lipoic-acid-in-obstetrics-and-gynecology
#19
Chiara Di Tucci, Mara Di Feliciantonio, Flaminia Vena, Carmela Capone, Michele Carlo Schiavi, Daniela Pietrangeli, Ludovico Muzii, Pierluigi Benedetti Panici
Alpha-Lipoic acid (ALA) is a natural antioxidant synthetized by plants and animals, identified as a catalytic agent for oxidative decarboxylation of pyruvate and α-ketoglutarate. In this review, we analyzed the action of ALA in gynecology and obstetrics focusing in particular on neuropathic pain and antioxidant and anti-inflammatory action. A comprehensive literature search was performed in PubMed and Cochrane Library for retrieving articles in English language on the antioxidant and anti-inflammatory effects of ALA in gynecological and obstetrical conditions...
May 4, 2018: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29722560/intrauterine-growth-restriction-decreases-nuclear-factor-kappa-b-signaling-in-fetal-pulmonary-artery-endothelial-cells-of-fetal-sheep
#20
R Blair Dodson, Kyle N Powers, Jason Gien, Paul J Rozance, Gregory J Seedorf, David Astling, Kenneth Lloyd Jones, Timothy M Crombleholme, Steven H Abman, Cristina M Alvira
Intrauterine growth restriction (IUGR) in premature newborns increases the risk for bronchopulmonary dysplasia (BPD), a chronic lung disease characterized by disrupted pulmonary angiogenesis and alveolarization. We previously showed that experimental IUGR impairs angiogenesis, however, mechanisms that impair pulmonary artery endothelial cell (PAEC) function are uncertain. The nuclear factor-kappa-B (NFκB) pathway promotes vascular growth in the developing mouse lung, and we hypothesized that IUGR disrupts NFκB-regulated pro-angiogenic targets in fetal PAEC...
May 3, 2018: American Journal of Physiology. Lung Cellular and Molecular Physiology
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