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Placenta implantation

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https://www.readbyqxmd.com/read/28812469/placental-pathologic-associations-with-morbidly-adherent-placenta-potential-insights-into-pathogenesis
#1
Linda M Ernst, Rebecca L Linn, Lucy Minturn, Emily S Miller
Background The pathology that underlies morbidly adherent placenta (MAP) is poorly understood. The objective of this study was to describe the placental pathology, especially implantation site pathology, associated with MAP. Methods This was a single institution, retrospective case-control study design examining placentas of patients who delivered between January 2008 and September 2013. MAP cases were defined by the need for clinical intervention at delivery beyond spontaneous placental delivery or simple manual extraction of the placenta...
September 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28782224/prokineticin-1-is-up-regulated-by-insulin-in-decidualizing-human-endometrial-stromal-cells
#2
Dorina Ujvari, Ivika Jakson, Cecilia Oldmark, Sanaz Attarha, Twana Alkasalias, Daniel Salamon, Sebastian Gidlöf, Angelica Lindén Hirschberg
Prokineticin 1 (PROK1), a hypoxia-regulated angiogenic factor, has emerged as a crucial regulator of embryo implantation and placentation. Dysregulation of PROK1 has been linked to recurrent pregnancy loss, pre-eclampsia, foetal growth restriction and preterm birth. These pregnancy complications are common in women with obesity and polycystic ovary syndrome, i.e. conditions associated with insulin resistance and compensatory hyperinsulinaemia. We investigated the effect of insulin on PROK1 expression during in vitro decidualization...
August 7, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28781765/up-and-down-immunity-of-pregnancy-in-humans
#3
REVIEW
Philippe Le Bouteiller, Armand Bensussan
One part of the human placenta in early pregnancy is particularly important for local immunity: the decidua basalis, which is transformed endometrium located at the site of embryo implantation . This placental bed tissue contains both maternal uterine immune cells, including decidual natural killer (NK) cells, the dominant leukocyte population exhibiting a unique phenotype, and fetal extravillous trophoblast which comes into direct contact with maternal decidual cells . To establish a successful placental development and healthy pregnancy outcome, the maternal immune system must tolerate paternal antigens expressed by trophoblast cells yet remain efficient for clearing any local pathogen infection...
2017: F1000Research
https://www.readbyqxmd.com/read/28765940/il%C3%A2-33-restricts-invasion-and-adhesion-of-trophoblast-cell-line-jeg3-by-downregulation-of-integrin-%C3%AE-4%C3%AE-1-and-cd62l
#4
Xiao-Hui Wang, Wei Liu, Deng-Xuan Fan, Wen-Ting Hu, Ming-Qing Li, Xiao-Yong Zhu, Li-Ping Jin
Interleukin-33 (IL-33) promotes migration of cancer cells through downregulating the expression of E-cadherin. Previous studies have demonstrated that IL‑33 stimulates the proliferation of trophoblasts. However, the effect of IL‑33 on the adhesion and invasion of trophoblasts has not been investigated in detail. In the present study, the expression of IL‑33 and its receptor, IL‑1 receptor‑like 1 (ST2), was examined in villi from women during early pregnancy using immunohistochemistry. ST2 expression on human trophoblast and choriocarcinoma cell lines JAR, BeWo, JEG3 and HTR8 was confirmed by flow cytometry (FCM) assay...
July 26, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28758928/role-of-plasminogen-activator-inhibitor-type-1-in-pathologies-of-female-reproductive-diseases
#5
REVIEW
Yao Ye, Aurelia Vattai, Xi Zhang, Junyan Zhu, Christian J Thaler, Sven Mahner, Udo Jeschke, Viktoria von Schönfeldt
Normal pregnancy is a state of hypercoagulability with diminishing fibrinolytic activity, which is mainly caused by an increase of plasminogen activator inhibitor type 1 (PAI-1). PAI-1 is the main inhibitor of plasminogen activators, including tissue-type plasminogen activator (tPA) and urokinase-type plasminogen activator (uPA). In human placentas, PAI-1 is expressed in extravillous interstitial trophoblasts and vascular trophoblasts. During implantation and placentation, PAI-1 is responsible for inhibiting extra cellular matrix (ECM) degradation, thereby causing an inhibition of trophoblasts invasion...
July 29, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28756581/predelivery-uterine-arteries-embolization-in-patients-affected-by-placental-implant-anomalies
#6
Francesco Giurazza, Giuseppe Albano, Liliana Valentino, Emiliano Schena, Tiziana Capussela, Maria Antonella Di Pasquale, Francesco Di Pietto, Rosaria De Ritis, Gennaro Nasti, Giuseppe Scognamiglio, Raffaella Niola
PURPOSE: The aim of this study is to report on a single center experience of managing patients affected by placenta previa major and/or accretism by embolizing uterine arteries immediately before the cesarean delivery to reduce blood loss and secondary the rate of hysterectomies. MATERIALS AND METHODS: Sixty-nine patients have been prospectively enrolled. Inclusion criteria were radiological diagnosis of placenta anomalies and risk factors for peri/postpartum hemorrhage...
July 29, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28753590/ectopic-abdominal-pregnancy-due-to-uterine-perforation-after-an-attempt-to-terminate-pregnancy-a-case-presentation
#7
Jónathan Hernández Núñez, Alexander Abreu Díaz, Ndivhuwo Michael Ndwambi, Fermín Luis Martínez
Secondary abdominal ectopic pregnancy is rare in clinical practice, but may lead to an increased maternal mortality. We present the case of a patient with an abdominal pregnancy secondary to a uterine perforation caused by a voluntary attempt to interrupt pregnancy that presented with nine weeks of abdominal pain and minimal vaginal bleeding which was mistakenly diagnosed as acute pelvic inflammatory disease, urinary tract infection, and post-abortion products of conception. Finally, the abdominal ultrasound test found an abdominal ectopic pregnancy...
July 17, 2017: Medwave
https://www.readbyqxmd.com/read/28747528/embryo-implantation-evolved-from-an-ancestral-inflammatory-attachment-reaction
#8
Oliver W Griffith, Arun R Chavan, Stella Protopapas, Jamie Maziarz, Roberto Romero, Gunter P Wagner
The molecular changes that support implantation in eutherian mammals are necessary to establish pregnancy. In marsupials, pregnancy is relatively short, and although a placenta does form, it is present for only a few days before parturition. However, morphological changes in the uterus of marsupials at term mimic those that occur during implantation in humans and mice. We investigated the molecular similarity between term pregnancy in the marsupials and implantation in eutherian mammals using the gray short-tailed opossum (Monodelphis domestica) as a model...
July 26, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28722160/placental-proteomics-reveal-insights-into-fetal-alcohol-spectrum-disorders
#9
Katie L Davis-Anderson, Sebastian Berger, Emilie R Lunde-Young, Vishal D Naik, Heewon Seo, Greg A Johnson, Hanno Steen, Jayanth Ramadoss
Fetal alcohol spectrum disorders (FASD) describe many of the well-known neurodevelopmental deficits afflicting children exposed to alcohol in utero. The effects of alcohol on the maternal-fetal interface, especially the placenta, have been less explored. We herein hypothesized that chronic binge alcohol exposure during pregnancy significantly alters the placental protein profile in a rat FASD model METHODS: Pregnant rats were orogastrically treated daily with alcohol (4.5 g/kg, gestational day (GD) 5-10; 6...
July 19, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28699111/hla-class-ib-in-pregnancy-and-pregnancy-related-disorders
#10
REVIEW
Gry Persson, Wenna Nascimento Melsted, Line Lynge Nilsson, Thomas Vauvert F Hviid
The HLA class Ib genes, HLA-E, HLA-F, and HLA-G, were discovered long after the classical HLA class Ia genes. The elucidation of their functions had a modest beginning. However, their basic functions and involvement in pathophysiology and a range of diseases are now emerging. Although results from a range of studies support the functional roles for the HLA class Ib molecules in adult life, especially HLA-G and HLA-F have most intensively been, and were also primarily, studied in relation to reproduction and pregnancy...
July 11, 2017: Immunogenetics
https://www.readbyqxmd.com/read/28678605/the-early-pregnancy-placenta-foreshadows-dna-methylation-alterations-of-solid-tumors
#11
Akpéli V Nordor, Djamel Nehar-Belaid, Sophie Richon, David Klatzmann, Dominique Bellet, Virginie Dangles-Marie, Thierry Fournier, Martin J Aryee
The placenta relies on phenotypes that are characteristic of cancer to successfully implant the embryo in the uterus during early pregnancy. Notably, it has to invade its host tissues, promote angiogenesis-while surviving hypoxia-, and escape the immune system. Similarities in DNA methylation patterns between the placenta and cancers suggest that common epigenetic mechanisms may be involved in regulating these behaviors. We show here that megabase-scale patterns of hypomethylation distinguish first from third trimester chorionic villi in the placenta, and that these patterns mirror those that distinguish many tumors from corresponding normal tissues...
July 5, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/28670836/epithelial-cadherin-disassociates-from-the-lateral-plasma-membrane-of-uterine-epithelial-cells-throughout-pregnancy-in-a-marsupial
#12
Jessica S Dudley, Christopher R Murphy, Michael B Thompson, Bronwyn M McAllan
The uterine luminal epithelium is the first site of contact between fetal and maternal tissues during therian pregnancy and must undergo specialised changes for implantation of the blastocyst to be successful. These changes, collectively termed the plasma membrane transformation (PMT), allow the blastocyst to attach to the uterine epithelium preceding the formation of a placenta. There are similarities in the morphological and molecular changes occurring in live-bearing eutherian species during the PMT studied so far...
July 3, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28668162/mr-imaging-of-abnormal-placentation
#13
REVIEW
Manjiri Dighe
Morbidly adherent placenta (MAP) encompasses a spectrum of conditions characterized by abnormal adherence of the placenta to the implantation site. Classification of MAP is based on the degree of trophoblastic invasion through myometrium and uterine serosa and includes accrete, when the villi are attached to the myometrium but do not invade the muscle; increta, when the placenta invades partially through the myometrium; and percreta, when it invades up to and beyond the uterine serosa. Knowledge of the common findings of MAP on MR imaging is important to be able to provide an accurate diagnosis...
August 2017: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/28667126/functional-implications-of-the-relaxin-rln-system-in-the-dog-throughout-pregnancy-and-at-term
#14
Marta Nowak, Aykut Gram, Alois Boos, Selim Aslan, Serhan Serhat Ay, Firdevs Önyay, Mariusz Kowalewski
Relaxin (RLN) is a key hormone of pregnancy in mammals best known for its involvement in connective tissue remodeling. In the domestic dog, placental RLN is the only known endocrine marker of pregnancy. However, knowledge is sparse regarding the spatio-temporal expression of RLN and its receptors (RXFP1 and RXFP2) in the canine uterus and placenta. Here, their expression was investigated in the pre-implantation uterus and utero-placental compartments (UtPl) at selected time points during gestation: post-implantation, mid-gestation, and at normal and antigestagen-induced luteolysis/abortion...
June 30, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28661576/physiological-alterations-associated-with-intrauterine-growth-restriction-in-fetal-pigs-causes-and-insights-for-nutritional-optimization
#15
REVIEW
Junjun Wang, Cuiping Feng, Ting Liu, Meng Shi, Guoyao Wu, Fuller W Bazer
Intrauterine growth restriction (IUGR) remains a major problem in swine production since the associated low birth weight leads to high rates of pre-weaning morbidity and mortality plus permanent retardation of growth and development. Complex biological events-including genetics, epigenetics, maternal maturity, maternal nutrition, placenta efficiency, uterine capacity, and other environmental factors-can affect fetal growth and development during late gestation, as well as maturity of oocytes, duration of estrus, and both implantation and placentation of conceptuses in uteri of sows...
June 29, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28655551/adult-venous-endothelium-is-a-niche-for-highly-proliferative-and-vasculogenic-endothelial-colony-forming-cells
#16
Linden Green, Richard H Ofstein, Brian Rapp, M Reza Saadatzadeh, Janak R Bhavsar, Andres Fajardo, Michael C Dalsing, David A Ingram, Michael P Murphy
OBJECTIVE: Postnatal resident endothelium of blood vessels has been proposed to represent terminally differentiated tissue that does not replicate. We previously isolated endothelial colony-forming cells (ECFCs) from human umbilical cord blood (CB) and term placenta by using colony-forming assays and immunocytochemistry. We showed that ECFCs are highly proliferative and form functioning vessels in vivo, the defining characteristics of a true endothelial progenitor cell. This exploratory investigation was conducted to determine whether the endothelium of healthy adult blood vessels contained resident ECFCs...
June 24, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28653993/mechanistic-insight-into-long-noncoding-rnas-and-the-placenta
#17
REVIEW
Dale McAninch, Claire T Roberts, Tina Bianco-Miotto
Long non-coding RNAs (lncRNAs) are classified as RNAs greater than 200 nucleotides in length that do not produce a protein product. lncRNAs are expressed with cellular and temporal specificity and have been shown to play a role in many cellular events, including the regulation of gene expression, post-transcriptional modifications and epigenetic modifications. Since lncRNAs were first discovered, there has been increasing evidence that they play important roles in the development and function of most organs, including the placenta...
June 27, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28651899/the-cytotrophoblastic-shell-and-complications-of-pregnancy
#18
Graham J Burton, Eric Jauniaux
Many complications of pregnancy have their pathophysiological roots in the early stages of placentation. Impaired trophoblast invasion and deficient remodelling of the maternal spiral arteries are a common feature. While malperfusion of the placenta may underpin cases of fetal growth restriction and early-onset pre-eclampsia, the mechanistic links to spontaneous miscarriage, pre-term labour and premature rupture of the membranes are less obvious. Here, we speculate that formation of a well-developed cytotrophoblastic shell at the maternal-fetal interface is crucial for pregnancy success...
June 13, 2017: Placenta
https://www.readbyqxmd.com/read/28631072/down-regulation-of-soluble-fms-like-tyrosine-kinase-1-expression-in-invasive-placentation
#19
Scott A Shainker, Katelyn Dannheim, Kristin D Gerson, Dayna Neo, Zsuzsanna K Zsengeller, Elizabeth Pernicone, S Ananth Karumanchi, Michele R Hacker, Jonathan L Hecht
PURPOSE: To confirm reduced expression of soluble fms-like tyrosine kinase 1 (sFlt-1) in accreta/increta. METHODS: Formalin-fixed tissue sections from 11 peripartum hysterectomies with invasive placentation and 5 controls were stained for sFlt-1. Stain intensity was scored in selected 100× microscopic fields. We compared sFlt-1 expression in invasive areas among cases, non-invasive areas among cases and areas from control placentas. RESULTS: Chorionic villi displayed significantly decreased sFlt-1 expression in invasive areas of cases compared to control placentas (p = 0...
August 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28612537/-convention-ultrasound-and-contrast-enhanced-ultrasound-imaging-in-the-diagnosis-of-placenta-implantation
#20
Wen Xiong, Hong Luo
OBJECTIVES: To determine the value of conventional ultrasound (US) and contrast-enhanced ultrasound (CEUS) in the diagnosis of placenta residue with implantation. METHODS: We retrospectively analyzed 112 cases of placenta remnants from Apr. 2013 to Mar. 2016, all of which were confirmed by pathological results. The cases were divided into implanted (n =74) and non-implanted (n =38) groups. We compared the characteristics of US and CEUS imaging between the two groups...
March 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
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