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Placenta implantation

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https://www.readbyqxmd.com/read/28447504/placental-growth-factor-plgf-as-an-angiogenic-inflammatory-switcher-lesson-from-early-pregnancy-losses
#1
Hamid Reza Nejabati, Zeinab Latifi, Tohid Ghasemnejad, Amir Fattahi, Mohammad Nouri
Placental growth factor (PlGF) is an angiogenic factor which belongs to vascular endothelial growth factor (VEGF) family. In addition to the angiogenic function of PlGF, in some conditions such as preeclampsia and early pregnancy losses, it can induce inflammatory reactions which could be accompanied with reduced angiogenesis. Hence, it is crucial to investigate inflammatory and angiogenic switching states and understand underlying mechanisms. PlGF is expressed in endometrium, placenta and trophoblast cells and is involved in maturation of uterine NK cells...
April 27, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28420494/molecular-regulation-and-role-of-angiogenesis-in-reproduction
#2
REVIEW
Momchil Rizov, Petya Andreeva, Ivanka Dimova
Angiogenesis is an essential process for proper functioning of the female reproductive system and for successful pregnancy realization. The multitude of factors required for physiological angiogenesis and the complexity of regulation of their temporal-spatial activities contribute to aberrations in human fertilization and pregnancy outcomes. In this study, we reviewed the current knowledge of the temporal expression patterns, functions, and regulatory mechanisms of angiogenic factors during foliculogenesis, early implantation/placentation and embryo development, as well as recurrent spontaneous abortions...
April 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28418212/role-of-autophagy-in-oocytogenesis-embryogenesis-implantation-and-pathophysiology-of-pre-eclampsia
#3
Akitoshi Nakashima, Aiko Aoki, Tae Kusabiraki, Tomoko Shima, Osamu Yoshino, Shi-Bin Cheng, Surendra Sharma, Shigeru Saito
Autophagy is a well-conserved mechanism in cells from yeast to mammals, and autophagy maintains homeostasis against stress. The role of autophagy was originally shown to be a mechanism of energy production under starvation. In fact, multiple lines of evidence reveal that autophagy has numerous functions, such as protection from stress, energy regulation, immune regulation, differentiation, proliferation, and cell death. In the field of reproduction, the role of autophagy in implantation, embryogenesis, placentation, and delivery has become clearer...
April 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28416845/-anesthetic-choice-for-patients-undergoing-cesarean-section-complicated-with-placenta-implantation
#4
Y Wang, H Zeng, X Y Guo, X Y Rong
OBJECTIVE: To investigate the anesthetic choice for patients undergoing cesarean section complicated with placenta implantation. METHODS: A retrospective case review of the patients with placenta implantation between 2008 and 2013 at Peking University Third Hospital was conducted in the International Classification of Diseases (ICD)-9 codes, excluding natural birth and not first diagnosed in our hospital, a total of 96 cases were incorporated into this study. According to the degree of implantation, they were divided into three groups: accreta group, increta group and percreta group...
April 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28411456/urinary-bladder-injury-during-cesarean-delivery-maternal-outcome-from-a-contemporary-large-case-series
#5
Lina Salman, Shachar Aharony, Anat Shmueli, Arnon Wiznitzer, Rony Chen, Rinat Gabbay-Benziv
BACKGROUND: Urinary bladder injury is a rare complication during cesarean delivery. Little is known on maternal outcome following this injury. OBJECTIVE: To evaluate short and long-term maternal outcome following bladder injury during cesarean delivery. STUDY DESIGN: A retrospective case series of all pregnancies complicated by full-thickness bladder injury during cesarean delivery in a single university affiliated tertiary medical center (August 2007-June 2016)...
April 5, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28402512/defective-trophoblast-invasion-underlies-fetal-growth-restriction-and-pre-eclampsia-like-symptoms-in-the-stroke-prone-spontaneously-hypertensive-rat
#6
G Barrientos, M Pussetto, M Rose, A C Staff, S M Blois, J E Toblli
STUDY QUESTION: What is the impact of chronic hypertension on placental development, fetal growth and maternal outcome in the stroke-prone spontaneously hypertensive rat (SHRSP)? SUMMARY ANSWER: SHRSP showed an impaired remodeling of the spiral arteries and abnormal pattern of trophoblast invasion during placentation, which were associated with subsequent maternal glomerular injury and increased baseline hypertension as well as placental insufficiency and asymmetric fetal growth restriction...
April 11, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28392013/characterizing-the-lipid-and-metabolite-changes-associated-with-placental-function-and-pregnancy-complications-using-ion-mobility-spectrometry-mass-spectrometry-and-mass-spectrometry-imaging
#7
Kristin E Burnum-Johnson, Erin S Baker, Thomas O Metz
Successful pregnancy is dependent upon discrete biological events, which include embryo implantation, decidualization, and placentation. Problems associated with each of these events can cause infertility or conditions such as preeclampsia. A greater understanding of the molecular changes associated with these complex processes is necessary to aid in identifying treatments for each condition. Previous nuclear magnetic resonance spectroscopy and mass spectrometry studies have been used to identify metabolites and lipids associated with pregnancy-related complications...
March 29, 2017: Placenta
https://www.readbyqxmd.com/read/28389754/roles-of-grp78-in-female-mammalian-reproduction
#8
Cheng Zhang
The glucose-regulated protein (GRP78) also referred to as immunoglobulin heavy chain binding protein (Bip) is one of the best characterized endoplasmic reticulum (ER) chaperone proteins, which belongs to the heat-shock protein (HSP) family. GRP78 as a central regulator of ER stress (ERS) plays many important roles in cell survival and apoptosis through controlling the activation of transmembrane ERS sensors: PKR-like ER-associated kinase (PERK), inositol requiring kinase 1 (IRE1), and activating transcription factor 6 (ATF6)...
2017: Advances in Anatomy, Embryology, and Cell Biology
https://www.readbyqxmd.com/read/28376314/endogenous-lysophosphatidic-acid-participates-in-vascularisation-and-decidualisation-at-the-maternal-fetal-interface-in-the-rat
#9
Micaela S Sordelli, Jimena S Beltrame, Elsa Zotta, Natalia Gomez, Ganna Dmytrenko, María Elena Sales, Sandra M Blois, Carlos Davio, Silvina Perez Martinez, Ana M Franchi, María L Ribeiro
Lysophosphatidic acid (LPA) affects several female reproductive functions through G-protein-coupled receptors. LPA contributes to embryo implantation via the lysophospholipid LPA3 receptor. In the present study we investigated the participation of endogenous LPA signalling through the LPA3 receptor in vascularisation and decidualisation, two crucial events at the maternal-fetal interface. Pregnant rats were treated with diacylglycerol pyrophosphate (DGPP), a highly selective antagonist of LPA3 receptors, on Day 5 of gestation...
April 5, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28353203/gene-structure-of-the-pregnancy-associated-glycoprotein-like-pag-l-in-the-eurasian-beaver-castor-fiber-l
#10
Aleksandra Lipka, Marta Majewska, Grzegorz Panasiewicz, Martyna Bieniek-Kobuszewska, Bozena Szafranska
The pregnancy-associated glycoprotein-like family (PAG-L) is a large group of chorionic products, expressed in the pre-placental trophoblast and later in the post-implantational chorionic epithelium, and are involved in proper placenta development and embryo-maternal interaction in eutherians. This study describes identification of the PAG-L family in the genome of the Eurasian beaver (Castor fiber L.), named CfPAG-L. We identified 7657 bp of the CfPAG-L gDNA sequence (Acc. No. KX377932), encompassing nine exons (1-9) and eight introns (A-H)...
March 29, 2017: Functional & Integrative Genomics
https://www.readbyqxmd.com/read/28331644/term-abdominal-pregnancy-revealed-by-amnioperitoneum-in-rural-area
#11
Henri Donald Mutarambirwa, Bruno Kenfack, Jovanny Tsuala Fouogue
Abdominal pregnancy (AP) accounts for 1% of ectopic implantations. In sub-Saharan Africa, the high prevalence of sexually transmitted infections explains the increasing frequency of this pathology. In Cameroon it rose from 1/10000 deliveries (1995) to 3.3/10000 (2015). Authors herein report a case of a viable abdominal pregnancy discovered at term during emergency laparotomy for suspected uterine rupture. The 24-year-old G2P0 patient was HIV-positive, under antiretrovirals, though AP exceptionally occurs in HIV patients...
2017: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28327211/reduced-fetal-vitamin-d-status-by-maternal-undernutrition-during-discrete-gestational-windows-in-sheep
#12
J K Cleal, M R Hargreaves, K R Poore, J C Y Tang, W D Fraser, M A Hanson, L R Green
Placental transport of vitamin D and other nutrients (e.g. amino acids, fats and glucose) to the fetus is sensitive to maternal and fetal nutritional cues. We studied the effect of maternal calorific restriction on fetal vitamin D status and the placental expression of genes for nutrient transport [aromatic T-type amino acid transporter-1 (TAT-1); triglyceride hydrolase/lipoprotein uptake facilitator lipoprotein lipase (LPL)] and vitamin D homeostasis [CYP27B1; vitamin D receptor (VDR)], and their association with markers of fetal cardiovascular function and skeletal muscle growth...
March 22, 2017: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/28326953/placenta-increta-presenting-as-exaggerated-placental-site-reaction
#13
Stewart F Cramer, Debra S Heller
Exaggerated placental site (EPS) is usually an incidental finding seen in curettings after an abortion. Placenta increta is, by definition, a disease that damages and destroys myometrium; however, prior literature has not paid sufficient attention to the role of myometrium in its pathogenesis and diagnosis. We present an unusual case of placenta increta in a hysterectomy performed for uterine perforation after curettage for the termination of pregnancy at 18 weeks. The initial histologic section of the implantation site suggested EPS...
March 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28326648/changes-in-expression-of-the-cd200-tolerance-signaling-molecule-and-its-receptor-cd200r-by-villus-trophoblasts-during-first-trimester-missed-abortion-and-in-chronic-histiocytic-intervillositis
#14
David A Clark, Jennifer M Dmetrichuk, Elizabeth McCready, Sukhbinder Dhesy-Thind, Jorge L Arredondo
PROBLEM: Expression of CD200 at the feto-maternal interface is associated with successful murine and human pregnancy. CD200 binding to CD200 receptors on lymphomyeloid cells suppresses inflammation and induces Tregs. CD200 receptors are also expressed on mouse and human placental trophoblast cells. What is the expression of CD200 and CD200R in human missed abortions which have preserved Treg levels and in chronic histiocytic intervillositis (CHI) where maternal inflammatory cells cause IUGR? METHODS: Immunohistiochemistry for CD200, CD200R, and Ki67 using human placental sections from missed abortions, term placenta, and CHI...
March 22, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28324064/bmp7-induces-uterine-receptivity-and-blastocyst-attachment
#15
Diana Monsivais, Caterina Clementi, Jia Peng, Paul T Fullerton, Renata Prunskaite-Hyyryläinen, Seppo J Vainio, Martin M Matzuk
In women, the window of implantation is limited to a brief 2- to 3-day period characterized by optimal levels of circulating ovarian hormones and a receptive endometrium. Although the window of implantation is assumed to occur 8 to 10 days after ovulation in women, molecular markers of endometrial receptivity are necessary to determine optimal timing prior to embryo transfer. Previous studies showed that members of the bone morphogenetic protein (BMP) family are expressed in the uterus necessary for female fertility; however, the role of BMP7 during implantation and in late gestation is not known...
April 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28295343/epithelial-membrane-protein-2-emp2-deficiency-alters-placental-angiogenesis-mimicking-features-of-human-placental-insufficiency
#16
Carmen J Williams, Alison Chu, Wendy N Jefferson, David Casero, Deepthi Sudhakar, Nevil Khurana, Claire P Hogue, Chinmayi Aryasomayajula, Priya Patel, Peggy Sullivan, Elizabeth Padilla-Banks, Shabnam Mohandessi, Carla Janzen, Madhuri Wadehra
Epithelial membrane protein-2 (EMP2) is a tetraspan protein predicted to regulate placental development. Highly expressed in secretory endometrium and trophectoderm cells, previous studies suggest that it may regulate implantation by orchestrating the surface expression of integrins and other membrane proteins. In order to test the role of EMP2 in pregnancy, mice lacking EMP2 (Emp2(-/-) ) were generated. Emp2(-/-) females are fertile but have reduced litter sizes when carrying Emp2(-/-) but not Emp2(+/-) fetuses...
March 14, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28288930/assessing-the-effect-of-oral-exposure-to-paenibacillus-alvei-a-potential-biocontrol-agent-in-male-non-pregnant-pregnant-animals-and-the-developing-rat-fetus
#17
Robert L Sprando, Thomas Black, Nicholas Olejnik, Zachary Keltner, Vanessa Topping, Martine Ferguson, Darcy Hanes, Eric Brown, Jie Zheng
Paenibacillus alvei, a naturally occurring soil microorganism, may be used in the control and/or elimination of human/animal pathogens present on/within produce commodities associated with human consumption. The safety of oral exposure to P. alvei in male, nulliparous females, the pregnant dam and developing fetus was assessed. Adult male and female rats received a single oral dose (gavage) of P. alvei and tissues were collected at post exposure days 0, 3 and 14. To evaluate the effect of the test organism on fetal development, sperm positive female rats received the test organism every 3 days thereafter throughout gestation...
March 10, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28281300/the-effect-of-anatomical-placental-location-on-the-third-stage-of-labor
#18
Ulaş Fidan, Mustafa Ulubay, Serkan Bodur, Mehmet Ferdi Kinci, Kazim Emre KaraşahiN, Müfit Cemal Yenen
According to the lower uterine segment and trophotropism hypotheses of placental implantation, placentation occurs in uterine segments with a high blood supply. The present study was designed to determine the clinical implications of these hypotheses by assessing the dynamics of the third stage of labor. Two-hundred and ninety-two prospectively followed pregnant women were assessed at the time of delivery. The uterine locations of the placentas were determined according to the position of the main placental volume and mass under a sagittal view obtained using a centrally located ultrasonography probe...
March 9, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28264611/prevalence-and-diagnostic-accuracy-of-doppler-ultrasound-of-placenta-accreta-in-egypt
#19
Ahmed M Maged, Emad Salah, Hany Saad, Hadeer Meshaal, Ashraf Eldaly, Maha A Katta, Wesam S Deeb
OBJECTIVE: To assess the prevalence of placenta accreta among those with placenta implanted over CS scar and to evaluate the accuracy of Doppler ultrasound in diagnosis. METHODS: A cross sectional study included 100 patients with placenta previa anterior with at least one previous CS. Ultrasound and color Doppler was done to all participants and correlated with operative findings. RESULTS: There was a significant difference between accrete and non accrete group regarding maternal age (32...
March 6, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28258943/anaesthesia-for-abnormally-invasive-placenta-a-single-institution-case-series
#20
N J Taylor, R Russell
BACKGROUND: Abnormally invasive placenta describes a spectrum of disorders resulting in pathological placental implantation. It is associated with the potential for severe maternal haemorrhage and poor fetal outcome. Increasing numbers of women are at risk owing to the rising incidence of uterine surgery and increasing maternal age. We report data over a five-year period describing anaesthetic management of cases of abnormally invasive placenta in a UK tertiary-referral maternity unit and assess how management has developed...
January 23, 2017: International Journal of Obstetric Anesthesia
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