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Placenta implantation

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https://www.readbyqxmd.com/read/27918727/the-current-state-of-reproductive-biology-research-in-australia-and-new-zealand-core-themes-from-the-society-for-reproductive-biology-annual-meeting-2016
#1
L K Akison, P H Andraweera, M J Bertoldo, H M Brown, J S M Cuffe, T Fullston, O Holland, J E Schjenken
Because reproduction is essential for all life, it is central to our understanding of all aspects of biology. The Society for Reproductive Biology (SRB) 2016 conference held on the Gold Coast (Qld, Australia) displayed the current breadth of reproductive research in Australia and New Zealand, with additional insights from world leaders in the field. This conference review provides a focused summary of the key questions, emerging ideas and novel technologies that were presented in the symposia. Presented research demonstrated key advances in how stem cell biology may allow us to better understand pluripotency, as well as how environmental and lifestyle factors, such as circadian disruption, smoking, alcohol and diet, affect gametogenesis, embryo implantation, placental function and reproductive capacity...
December 6, 2016: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/27907939/intraoperative-intermittent-blocking-of-the-common-iliac-arteries-in-cases-of-placenta-percreta-without-the-use-of-fluoroscopy
#2
S Heinze, B Filsinger, G Kastenholz, R J Schröder
Background: The number of patients with placenta accreta, percreta and increta is increasing. The morbidity and mortality are higher mostly due to hemorrhage. Therefore, new methods to reduce the risk of severe bleeding are necessary. Methods: Three patients were treated in collaboration by obstetricians, urologists, anesthesiologists, and radiologists. An MRI of the pelvis was performed and the diameters and lengths of the iliac arteries were measured to avoid fluoroscopy during the preoperative placement of catheter balloons into the iliac arteries...
December 2016: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/27904691/implantation-of-placenta-derived-mesenchymal-stem-cells-accelerates-murine-dermal-wound-closure-through-immunomodulation
#3
Haifeng Wang, Lianyu Chen, Yang Liu, Bangzhen Luo, Nanzi Xie, Tao Tan, Lige Song, Pei Erli, Ming Luo
BACKGROUND: Diabetic foot ulcer (DFU) is a major complication of diabetes mellitus. Although previous studies have established that inflammation, ischemia and neuropathy contribute to the development of DFU, it is still an unmet medical need due to lack knowledge of cellular and molecular mechanisms associated with DFU. In the present study, we tested our hypothesis that subcutaneous application of human placental mesenchymal stem cells (PMSCs) can accelerate diabetic dermal wound healing by modulating immunoresponse...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27871470/the-function-of-mir-519d-in-cell-migration-invasion-and-proliferation-suggests-a-role-in-early-placentation
#4
REVIEW
Lan Xie, Yoel Sadovsky
The processes of proliferation, migration, and invasion of extravillous trophoblasts are critical for placental implantation and early development, and directly influence pregnancy outcome. Dysregulation of these processes has been associated with placental dysfunction, implicated in clinical conditions such as preeclampsia and placental accreta. Among diverse microRNA (miRNA) species that are expressed in placental trophoblasts, members of the chromosome 19 miRNA cluster (C19MC) stand out in their nearly exclusive expression in the placenta...
December 2016: Placenta
https://www.readbyqxmd.com/read/27871464/downregulation-of-mir-29a-b-c-in-placenta-accreta-inhibits-apoptosis-of-implantation-site-intermediate-trophoblast-cells-by-targeting-mcl1
#5
Yongzhong Gu, Yuehong Bian, Xiaofei Xu, Xietong Wang, Changting Zuo, Jinlai Meng, Hongyan Li, Shigang Zhao, Yunnan Ning, Yongzhi Cao, Tao Huang, Junhao Yan, Zi-Jiang Chen
OBJECTIVE: Placenta accreta is defined as abnormal adhesion of placental villi to the uterine myometrium. Although this condition has become more common as a result of the increasing rate of cesarean sections, the underlying causative mechanism(s) remain elusive. Because microRNA-29a/b/c (miR-29a/b/c) have been shown to play important roles in placental development, this study evaluated the roles of these microRNAs in placenta accreta. METHODS: Expression of miR-29a/b/c and myeloid cell leukemia-1 (MCL1) were quantified in patient tissues and HTR8/SVneo trophoblast cells using the real-time quantitative polymerase chain reaction...
December 2016: Placenta
https://www.readbyqxmd.com/read/27862405/decidualization-of-the-canine-uterus-from-early-until-late-gestational-in-vivo-morphological-observations-and-functional-characterization-of-immortalized-canine-uterine-stromal-cell-lines
#6
F R Graubner, I M Reichler, N A Rahman, R Payan-Carreira, A Boos, M P Kowalewski
The apparent lack of classical mechanisms for maternal recognition of pregnancy is one of the most intriguing features of canine reproduction. Consequently, similar levels of circulating luteal steroids are observed in pregnant and non-pregnant dogs. However, the early pre-implantation canine embryo locally modulates uterine responses to its presence, facilitating the successful onset of pregnancy. As a part of this interaction, the canine uterus undergoes a species-specific decidualization. Maternal stroma-derived decidual cells develop, the only cells of the canine placenta expressing progesterone receptor (PGR)...
November 15, 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27861702/placental-implantation-and-migration-following-a-previous-caesarean-section-scar
#7
Reihaneh Pirjani, Farahnaz Seifmanesh, Afsaneh Tehranian, Ladan Hosseini, Reza Heidari, Alireza Ghajar, Mahdi Sepidarkish
This prospective cohort study was conducted in Arash Women's Hospital between August 2014 and August 2015 to define the relationship between caesarean section scar and placental implantation and migration. Seven hundred and thirty women with one previous birth (caesarean section or vaginal delivery) and a singleton pregnancy underwent three ultrasound examinations for placental evaluation at 11-14, 20 and 34 weeks gestation. Previous caesarean section was related to the increased odds of anterior placental implantation but no relation was seen between low-lying placenta or placenta praevia and previous caesarean...
November 11, 2016: Australian & New Zealand Journal of Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/27859764/differential-expression-and-activity-of-matrix-metalloproteinases-2-and-9-in-canine-early-placenta
#8
M Diessler, M Ventureira, R Hernandez, C Sobarzo, L Casas, C Barbeito, E Cebral
The zonary and endotheliochorial dog placenta is the most invasive placenta of carnivores. The importance of matrix metalloproteinases (MMP) in placenta invasiveness has been determined in several mammals including species with haemochorial, epitheliochorial and endotheliochorial placentation. Regarding the latter, the expression of MMP enzymes has been studied in the cat and the mature canine placenta. The aim of this study was to analyse the expression and activity of MMP-2 and MMP-9 in the early dog placenta...
November 11, 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27853262/the-lnc-rna-spry4-it1-modulates-trophoblast-cell-invasion-and-migration-by-affecting-the-epithelial-mesenchymal-transition
#9
Qing Zuo, Shiyun Huang, Yanfen Zou, Yetao Xu, Ziyan Jiang, Shan Zou, Haoqing Xu, Lizhou Sun
Preeclampsia is a common, pregnancy-specific disease and a major contributor to maternal and foetal morbidity and mortality. Some placental abnormalities, including deficient implantation, abnormal trophoblast cell function, and improper placental vascular development, are believed to lead to preeclampsia. The long noncoding RNA SPRY4-IT1 is more highly expressed in preeclamptic human placentas than in normal placentas. We assessed the role of epithelial-mesenchymal transition (EMT)-associated invasion and migration in HTR-8/SVneo trophoblast cells...
November 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27843122/allele-specific-methylome-and-transcriptome-analysis-reveals-widespread-imprinting-in-the-human-placenta
#10
Hirotaka Hamada, Hiroaki Okae, Hidehiro Toh, Hatsune Chiba, Hitoshi Hiura, Kenjiro Shirane, Tetsuya Sato, Mikita Suyama, Nobuo Yaegashi, Hiroyuki Sasaki, Takahiro Arima
DNA methylation is globally reprogrammed after fertilization, and as a result, the parental genomes have similar DNA-methylation profiles after implantation except at the germline differentially methylated regions (gDMRs). We and others have previously shown that human blastocysts might contain thousands of transient maternally methylated gDMRs (transient mDMRs), whose maternal methylation is lost in embryonic tissues after implantation. In this study, we performed genome-wide allelic DNA methylation analyses of purified trophoblast cells from human placentas and, surprisingly, found that more than one-quarter of the transient-in-embryo mDMRs maintained their maternally biased DNA methylation...
November 3, 2016: American Journal of Human Genetics
https://www.readbyqxmd.com/read/27827961/positive-regulation-of-decidualization-by-l-type-amino-acid-transporter-1-lat1-in-pregnant-mice
#11
Xiaojie Wang, Dongmei Tan, Jing Ma, Hao Liang, Qian Zhang, Yi Tan, Jiang Wang, Wenping Luo
Amino acids have an important role in the pre and post implantation of placenta and embryo development. l-type amino-acid transporter 1 (lat1) is responsible for the transportation of large neutral amino acids and is mainly expressed in human fetal liver, placenta, brain, etc. This study is the first to investigate the expression of lat1 in the early pregnancy of mouse uteri and its role in the process of decidualization. Endometrial stromal cells of a mouse model were used to evaluate decidualization from Day 4-8 of pregnancy in vitro followed by lat1 knock down by small interfering RNA and by a competitive inhibitor of Leucine transport 2-aminobicyclo-(2,2,1)-heptane-2-carboxylic acid (BCH)...
November 5, 2016: Nutrients
https://www.readbyqxmd.com/read/27827796/effect-of-body-position-and-ventilation-on-umbilical-artery-and-venous-blood-flows-during-delayed-umbilical-cord-clamping-in-preterm-lambs
#12
Stuart B Hooper, Kelly J Crossley, Valerie A Zahra, Jeroen van Vonderen, Alison Moxham, Andrew W Gill, Martin Kluckow, Arjan B Te Pas, Euan M Wallace, Graeme R Polglase
OBJECTIVE: While delayed umbilical cord clamping (UCC) is thought to facilitate placental to infant blood transfusion, the physiological factors regulating flow in the umbilical arteries and veins during delayed UCC is unknown. We investigated the effects of gravity, by changing fetal height relative to the placenta, and ventilation on umbilical blood flows and the cardiovascular transition during delayed UCC at birth. METHODS: Catheters and flow probes were implanted into preterm lambs (128 days) prior to delivery to measure pulmonary, carotid, umbilical artery (UaBF) and umbilical venous (UvBF) blood flows...
November 8, 2016: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/27822346/ultrasonographic-evaluation-of-placental-cord-insertion-at-different-gestational-ages-in-low-risk-singleton-pregnancies-a-predictive-algorithm
#13
F Padula, A S Laganà, S G Vitale, L Mangiafico, L D'Emidio, P Cignini, M Giorlandino, F A Gulino, S Capriglione, C Giorlandino
OBJECTIVE: To evaluate the accuracy of ultrasound in visualizing placental cord insertion (PCI) at different gestational ages in order to recommend the most feasible period during pregnancy to identify it. Secondary aim was to propose a predictive algorithm for PCI visualization. METHODS: We performed a single-center, prospective cohort study. We enrolled patients with singleton low-risk pregnancies who underwent fetal ultrasound scan at different gestational ages...
March 28, 2016: Facts, Views & Vision in ObGyn
https://www.readbyqxmd.com/read/27716437/effects-of-developmental-exposure-to-silver-in-ionic-and-nanoparticle-form-a-study-in-rats
#14
Mohammad Charehsaz, Karin Sørig Hougaard, Hande Sipahi, Asiye Işın Doğan Ekici, Çiğdem Kaspar, Mustafa Culha, Ülkü Ündeğer Bucurgat, Ahmet Aydin
BACKGROUND: Evaluations of silver in both nanoparticle (Ag-NPs) and ionic forms indicate some adverse effects on living organisms, but little is known about their potential for developmental toxicity. In this study, developmental toxicity of Ag-NPs (from 0.2 to 20 mg/kg/day) and ionic Ag (AgNO3, 20 mg Ag/kg/day) were investigated in rats. METHODS: Animals were dosed by gavage from gestation day 7 - 20. The day after parturition, dams and pups were sacrificed and Ag level assessed in several maternal and pup organs...
October 6, 2016: Daru: Journal of Faculty of Pharmacy, Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27714564/heat-shock-protein-27-hsp27-regulates-stat3-and-eif4g-levels-in-first-trimester-human-placenta
#15
Gali Epstein Shochet, Oded Komemi, Dana Sadeh-Mestechkin, Meir Pomeranz, Ami Fishman, Liat Drucker, Michael Lishner, Shelly Tartakover Matalon
During placental implantation, cytotrophoblast cells differentiate to extravillous trophoblast (EVT) cells that invade from the placenta into the maternal uterine blood vessels. The heat shock protein-27 (HSP27), the signal transducer and activator of transcription-3 (STAT3) and the eukaryotic translation initiation factor 4E (EIF4E) are involved in regulating EVT cell differentiation/migration. EIF4E and EIF4G compose the translation initiation complex, which is a major control point in protein translation...
October 6, 2016: Journal of Molecular Histology
https://www.readbyqxmd.com/read/27706615/hla-g-genetic-variants-and-hepatocellular-carcinoma-a-meta-analysis
#16
A V C Coelho, R R Moura, S Crovella, F Celsi
Human leukocyte antigen (HLA)-G is a key tolerogenic molecule mainly expressed in the placenta and is crucial for implantation of the embryo and immunological tolerance of the fetus during pregnancy. However, under pathological conditions, such as cancer or viral infections, HLA-G can be expressed in other tissues. The gene coding for HLA-G (HLA-G, chromosome 6p21.3) presents numerous polymorphisms, some of them influencing its expression. One of the most studied, is the 14 bp ins/del (rs371194629) situated at the 3'-UTR of the gene...
August 26, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27685354/transcriptional-analysis-by-nascent-rna-fish-of-in-vivo-trophoblast-giant-cells-or-in-vitro-short-term-cultures-of-ectoplacental-cone-explants
#17
Catherine Corbel, Edith Heard
The placenta derives from one extra-embryonic lineage, the trophectoderm. In the peri-implantation murine blastocyst, mural trophectoderm cells differentiate into primary trophoblast giant cells (TGCs) while the polar trophectoderm overlying the inner cell mass continues to proliferate later differentiating into secondary TGCs. TGCs play a key role in developing placenta and are essential for a successful pregnancy. Investigation of transcriptional regulation of specific genes during post-implantation development can give insights into TGCs development...
August 31, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27679825/the-effect-of-luteal-phase-gonadotropin-releasing-hormone-antagonist-administration-on-ivf-outcomes-in-women-at-risk-of-ohss
#18
Maryam Eftekhar, Sepideh Miraj, Zahrasadat Mortazavifar
BACKGROUND: Gonadotropin-releasing hormone (GnRH) plays essential roles in embryo implantation, invasion of trophoblastic tissue, and steroid synthesis in the placenta. OBJECTIVE: The aim of this study was to evaluate the effect of GnRH antagonist administration on pregnancy outcomes in early implantation period. MATERIALS AND METHODS: In this retrospective study, 94 infertile women undergoing GnRH antagonist protocol who were at risk of ovarian hyperstimulation syndrome (OHSS) were included...
August 2016: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/27671873/three-dimensional-microct-imaging-of-mouse-development-from-early-post-implantation-to-early-postnatal-stages
#19
Chih-Wei Hsu, Leeyean Wong, Tara L Rasmussen, Sowmya Kalaga, Melissa L McElwee, Lance C Keith, Ritu Bohat, John R Seavitt, Arthur L Beaudet, Mary E Dickinson
In this work, we report the use of iodine-contrast microCT to perform high-throughput 3D morphological analysis of mouse embryos and neonates between embryonic day 8.5 to postnatal day 3, with high spatial resolution up to 3µm/voxel. We show that mouse embryos at early stages can be imaged either within extra embryonic tissues such as the yolk sac or the decidua without physically disturbing the embryos. This method enables a full, undisturbed analysis of embryo turning, allantois development, vitelline vessels remodeling, yolk sac and early placenta development, which provides increased insights into early embryonic lethality in mutant lines...
September 23, 2016: Developmental Biology
https://www.readbyqxmd.com/read/27661402/placental-implantation-abnormalities-a-modern-approach
#20
Sevan A Vahanian, Anthony M Vintzileos
PURPOSE OF REVIEW: Placental implantation abnormalities (PIAs) comprise a large group of disorders associated with significant maternal, fetal, and neonatal morbidity. RECENT FINDINGS: Risk factors include prior uterine surgery/myometrial scarring and the presence of placenta previa with or without prior cesarean delivery. Newly identified risk factors include previous prelabor cesarean delivery and previous postpartum hemorrhage. PIAs contribute substantially to preterm birth with prematurity rates ranging from 38 to 82%...
December 2016: Current Opinion in Obstetrics & Gynecology
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