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Placental growth factor

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https://www.readbyqxmd.com/read/28526753/altered-feto-placental-vascularization-feto-placental-malperfusion-and-fetal-growth-restriction-in-mice-with-egfl7-loss-of-function
#1
Lauretta A Lacko, Romulo Hurtado, Samantha Hinds, Michael G Poulos, Jason M Butler, Heidi Stuhlmann
EGFL7 is a secreted, angiogenic factor produced by embryonic endothelial cells. To understand its role in placental development, we established a novel Egfl7 knockout mouse. The mutant mice have gross defects in chorioallantoic branching morphogenesis and placental vascular patterning. Microangiography and 3D imaging revealed patchy perfusion of Egfl7(-/-) placentas marked by impeded blood conductance through sites of narrowed vessels. Consistent with poor feto-placental perfusion, Egfl7 knockout resulted in reduced placental weight and fetal growth restriction...
May 19, 2017: Development
https://www.readbyqxmd.com/read/28522536/a-placental-growth-factor-is-silenced-in-mouse-embryos-by-the-zinc-finger-protein-zfp568
#2
Peng Yang, Yixuan Wang, Don Hoang, Matthew Tinkham, Anamika Patel, Ming-An Sun, Gernot Wolf, Mairead Baker, Huan-Chieh Chien, Kuan-Yu Nick Lai, Xiaodong Cheng, Che-Kun James Shen, Todd S Macfarlan
Insulin-like growth factor 2 (IGF2) is the major fetal growth hormone in mammals. We identify zinc finger protein 568 (ZFP568), a member of the rapidly evolving Kruppel-associated box-zinc finger protein (KRAB-ZFP) family linked primarily to silencing of endogenous retroelements, as a direct repressor of a placental-specific Igf2 transcript (designated Igf2-P0) in mice. Loss of Zfp568, which causes gastrulation failure, or mutation of the ZFP568-binding site at the Igf2-P0 promoter causes inappropriate Igf2-P0 activation...
May 19, 2017: Science
https://www.readbyqxmd.com/read/28522033/placenta-directed-gene-therapy-for-fetal-growth-restriction
#3
REVIEW
Tara Krishnan, Anna L David
Fetal growth restriction (FGR) is a serious pregnancy complication affecting ∼8% of all pregnancies. There is no treatment to increase fetal growth in the uterus. Gene therapy presents a promising treatment strategy for FGR, with the use of adenoviral vectors encoding for proteins such as vascular endothelial growth factor (VEGF) and insulin-like growth factor demonstrating improvements in fetal growth, placental function, and neonatal outcome in preclinical studies. Safety assessments suggest no adverse risk to the mother or fetus for VEGF maternal gene therapy; a clinical trial is in development...
May 15, 2017: Seminars in Fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28516786/association-of-angiogenic-cytokines-vegf-a-and-vegf-c-and-clinical-characteristic-in-women-with-unexplained-recurrent-miscarriage
#4
A Bagheri, P Kumar, A Kamath, P Rao
INTRODUCTION: Recurrent miscarriage (RM) defined as 2 or more spontaneous miscarriage before 20 weeks of gestation, affects at least 1 % of couples trying to conceive. In over 50 % of cases, the cause of the loss of pregnancy remains unexplained. Reduced expression of Angiogenic factors such as: vascular endothelial growth factor (VEGF-A) and VEGF-C has been linked with spontaneous miscarriage, likely due to defective foetal and placental angiogenesis. AIMS AND OBJECTIVES: To investigate the relationships between serum level of VEGF-A and VEGF-C with clinical characteristic in women with URM and compare to pregnant and healthy women...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/28506758/decreased-homodimerization-and-increased-timp-1-complexation-of-uteroplacental-and-uterine-arterial-matrix-metalloproteinase-9-during-hypertension-in-pregnancy
#5
Juanjuan Chen, Zongli Ren, Minglin Zhu, Raouf A Khalil
Preeclampsia is a complication of pregnancy manifested as hypertension-in-pregnancy (HTN-Preg) and often intrauterine growth restriction (IUGR). Placental ischemia could be an initiating event, but the molecular mechanisms are unclear. To test the hypothesis that dimerization of matrix metalloproteinases (MMPs) plays a role in HTN-Preg and IUGR, the levels/activity of MMP-9, tissue inhibitor of metalloproteinase (TIMP-1), and their dimerization forms were measured in the placenta, uterus, and uterine artery of normal pregnant (Preg) rats and a rat model of reduced uteroplacental perfusion pressure (RUPP)...
May 12, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28494189/increased-placental-sflt-1-but-unchanged-plgf-expression-in-late-onset-preeclampsia
#6
Laura Ehrlich, Alice Hoeller, Michaela Golic, Florian Herse, Frank H Perschel, Wolfgang Henrich, Ralf Dechend, Berthold Huppertz, Stefan Verlohren
OBJECTIVE: To investigate whether differences between late-onset preeclampsia (PE) and intrauterine growth restriction (IUGR) can be explained by differential placental expression patters of sFlt-1, Flt-1, and placental growth factor (PlGF). METHODS: Placental tissues and maternal blood samples from seven patients with PE, five IUGR, and seven age-matched controls were studied for mRNA and protein levels as well as protein localization and expression intensity. RESULTS: Placental PlGF mRNA and protein expression were not altered by placental dysfunction while placental villous trophoblast expression intensity of PlGF was increased...
May 11, 2017: Hypertension in Pregnancy
https://www.readbyqxmd.com/read/28494174/human-endometrial-stromal-cell-plasticity-reversible-sflt1-expression-negatively-coincides-with-decidualization
#7
Hanh N Cottrell, JuanJuan Wu, Bassam H Rimawi, Juan Manuel Duran, Jessica B Spencer, Neil Sidell, Augustine Rajakumar
Preeclampsia (PE) is a major complication of pregnancy in which the placenta is known to have shallow implantation into the uterine decidua. Studies have implicated soluble fms-like tyrosine kinase-1 (sFlt1), a soluble vascular endothelial growth factor (VEGF) receptor protein, in the pathogenesis of PE. sFlt1 has the ability to bind to and neutralize the angiogenic functions of VEGF and placental growth factor (PlGF). The presence of sFlt1 and its action in the endometrium is yet to be determined. We hypothesize that endometrial stromal cells (ESC) at the maternal-fetal interface may play a role in sFlt-1 regulation during pregnancy...
May 11, 2017: Hypertension in Pregnancy
https://www.readbyqxmd.com/read/28493900/genomic-biomarkers-of-prenatal-intrauterine-inflammation-in-umbilical-cord-tissue-predict-later-life-neurological-outcomes
#8
Sloane K Tilley, Robert M Joseph, Karl C K Kuban, Olaf U Dammann, T Michael O'Shea, Rebecca C Fry
BACKGROUND: Preterm birth is a major risk factor for neurodevelopmental delays and disorders. This study aimed to identify genomic biomarkers of intrauterine inflammation in umbilical cord tissue in preterm neonates that predict cognitive impairment at 10 years of age. STUDY DESIGN: Genome-wide messenger RNA (mRNA) levels from umbilical cord tissue were obtained from 43 neonates born before 28 weeks of gestation. Genes that were differentially expressed across four indicators of intrauterine inflammation were identified and their functions examined...
2017: PloS One
https://www.readbyqxmd.com/read/28491093/therapeutic-effect-and-location-of-gfp-labeled-placental-mesenchymal-stem-cells-on-hepatic-fibrosis-in-rats
#9
Jiong Yu, Guangshu Hao, Dan Wang, Jingqi Liu, Xiaotian Dong, Yanni Sun, Qiaoling Pan, Yang Li, Xiaowei Shi, Lanjuan Li, Hongcui Cao
Background. Liver fibrosis is a chronic progressive liver disease, but no established effective treatment exists except for liver transplantation. The present study was designed to investigate the effect of human placenta mesenchymal stem cells (hPMSCs) expressing green fluorescent protein (GFP) on carbon tetrachloride- (CCl4-) induced liver fibrosis in rats. Methods. Liver fibrosis was induced by subcutaneous injection with CCl4; hPMSCs were directly transplanted into rats through the caudal vein. The therapeutic efficacy of hPMSCs on liver fibrosis was measured by liver function tests, liver elastography, histopathology, Masson's trichrome and Sirius red staining, and immunohistochemical studies...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28487027/interleukin-11-up-regulates-endoplasmic-reticulum-stress-induced-target-pdia4-in-human-first-trimester-placenta-and-in%C3%A2-vivo-in-mice
#10
A L Winship, K Sorby, J Correia, A Rainczuk, J Yap, E Dimitriadis
Interleukin (IL)11 is a crucial factor for human trophoblast function and placentation. Elevated levels are associated with pregnancy complications including preeclampsia, intrauterine growth restriction (IUGR) and preterm birth. However, the regulation of IL11 in the placenta has not been investigated. We examined the effect of pro-inflammatory cytokines IL1β and TNFα, as well as low oxygen tension (2%) on IL11 levels in first trimester placental villous explants. IL1β upregulated IL11 mRNA and protein, while TNFα and low oxygen had no effect...
May 2017: Placenta
https://www.readbyqxmd.com/read/28483805/treating-the-dysfunctional-placenta
#11
Colin Peter Sibley
Placental dysfunction underlies major obstetric diseases such as pre-eclampsia and fetal growth restriction (FGR). Whilst there has been a little progress in prophylaxis there are still no treatments for placental dysfunction in normal obstetric practice. However, a combination of increasingly well described in vitro systems for studying the human placenta, together with the availability of more appropriate animal models of pre-eclampsia and FGR, has facilitated a recent surge in work aimed at repurposing drugs and therapies, developed for other conditions, as treatments for placental dysfunction...
May 8, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28481180/trophoblast-glycoprotein-tpgb-5t4-in-human-placenta-expression-regulation-and-presence-in-extracellular-microvesicles-and-exosomes
#12
S M K Alam, S Jasti, S K Kshirsagar, D S Tannetta, R A Dragovic, C W Redman, I L Sargent, H C Hodes, T L Nauser, T Fortes, A M Filler, K Behan, D R Martin, T A Fields, B K Petroff, M G Petroff
BACKGROUND: Many parallels exist between growth and development of the placenta and that of cancer. One parallel is shared expression of antigens that may have functional importance and may be recognized by the immune system. Here, we characterize expression and regulation of one such antigen, Trophoblast glycoprotein (TPGB; also called 5T4), in the placenta across gestation, in placentas of preeclamptic (PE) pregnancies, and in purified microvesicles and exosomes. METHODS: Trophoblast glycoprotein expression was analyzed by real-time reverse transcription-polymerase chain reaction (RT-PCR), Western blot, and immunohistochemistry...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28478827/mild-anemia-during-pregnancy-upregulates-placental-vascularity-development
#13
A Stangret, M Skoda, A Wnuk, M Pyzlak, D Szukiewicz
The connection between maternal hematological status and pregnancy outcome has been shown by many independent researchers. Attention was initially focused on the adverse effects of moderate and severe anemia. Interestingly, some studies revealed that mild anemia was associated with optimal fetal development and was not affecting pregnancy outcome. The explanation for this phenomenon became a target for scientists. Hemodilution, physiologic anemia and relative decrease in hemoglobin concentration are the changes observed during pregnancy but they do not explain the reasons for the positive influence of mild anemia on a fetomaternal unit...
May 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28470791/impaired-placentation-in-women-with-chronic-hypertension-that-develop-preeclampsia
#14
Anca M Panaitescu, Ranjit Akolekar, Nicholas Kametas, Argyro Syngelaki, Kypros H Nicolaides
OBJECTIVE: To compare the degree of impaired placentation in pregnancies which develop preeclampsia (PE) in women with and without chronic hypertension (CH). METHODS: The data for this study were derived from prospective screening for adverse pregnancy outcomes in women with singleton pregnancies attending for their first routine hospital visit at 11(+0) -13(+6) weeks' gestation. This visit included recording of maternal characteristics and medical history and measurements of mean arterial pressure (MAP), uterine artery pulsatility index (UTPI), serum placental growth factor (PLGF) and serum pregnancy associated plasma protein-A (PAPP-A)...
May 4, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28468839/human-relaxins-rlnh1-rlnh2-their-receptor-rxfp1-and-fetoplacental-growth
#15
Kelly Yamasato, Pai-Jong Stacy Tsai, James Davis, Sandra Yamamoto, Gillian Bryant-Greenwood
Relaxin, a systemic and placental hormone, has potential roles in fetoplacental growth. Human placenta expresses two RLN genes, RLNH1 and RLNH2. Maternal obesity is common and is associated with abnormal fetal growth. Our aims were to relate systemic and cord blood RLNH2, placental RLNs and their receptor (RXFP1) with fetoplacental growth in context of maternal body mass index, and associations with insulin-like growth factor 2 (IGF2) and vascular endothelial growth factor A (VEGFA) in the same placentas. Systemic, cord blood and placental samples were collected prior to term labor, divided by prepregnancy body mass index: underweight/normal (N=25) and overweight/obese (N=44)...
May 3, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28463968/differential-microrna-expression-in-human-placentas-of-term-intra-uterine-growth-restriction-that-regulates-target-genes-mediating-angiogenesis-and-amino-acid-transport
#16
Shanthie Thamotharan, Alison Chu, Katie Kempf, Carla Janzen, Tristan Grogan, David A Elashoff, Sherin U Devaskar
Placental insufficiency leading to intrauterine growth restriction (IUGR) demonstrates perturbed gene expression affecting placental angiogenesis and nutrient transfer from mother to fetus. To understand the post-transcriptional mechanisms underlying such placental gene expression changes, our objective was to identify key non-coding microRNAs that express biological function. To this end, we initially undertook microarrays targeting microRNAs in a small sub-set of placentas of appropriate (AGA) versus small for gestational age (SGA) weight infants, and observed up-regulation of 97 miRs and down-regulation of 44 miRs in SGA versus AGA...
2017: PloS One
https://www.readbyqxmd.com/read/28461601/angiogenic-markers-and-cardiovascular-indices-in-the-prediction-of-hypertensive-disorders-of-pregnancy
#17
Stefan Verlohren, Frank H Perschel, Baskaran Thilaganathan, Lisa Antonia Dröge, Wolfgang Henrich, Andreas Busjahn, Asma Khalil
Angiogenic and antiangiogenic factors have proven to be an accurate predictive means of preeclampsia. Echocardiographic studies have shown that women with preeclampsia exhibit significant cardiovascular strain, especially early-onset preeclampsia. The aim of this study is to determine preeclampsia risk with soluble fms-like tyrosin kinase 1/placental growth factor ratio, serum NT-proBNP (N-terminal pro B-type natriuretic peptide), and biophysical markers of cardiovascular function in a prospective case-control study...
June 2017: Hypertension
https://www.readbyqxmd.com/read/28455450/microvascular-function-in-pre-eclampsia-is-influenced-by-insulin-resistance-and-an-imbalance-of-angiogenic-mediators
#18
Anshuman Ghosh, Nicholas S Freestone, Nicholas Anim-Nyame, Francesca I F Arrigoni
In preeclampsia, maternal microvascular function is disrupted and angiogenesis is dysfunctional. Insulin resistance that occurs in some pregnancies also pathologically affects microvascular function. We wished to examine the relationship of angiogenic mediators and insulin resistance on microvascular health in pregnancy. We performed a nested, case-control study of 16 women who developed preeclampsia with 17 normal pregnant controls. We hypothesized that the impaired microvascular blood flow in preeclamptic women associated with an increased ratio of the antiangiogenic factors; (s-endoglin [sEng] and soluble fms-like tyrosine kinase-1 [sFlt-1]) and proangiogenic molecule (placental growth factor [PlGF]) could be influenced by insulin resistance...
April 2017: Physiological Reports
https://www.readbyqxmd.com/read/28454696/effect-of-glucocorticoids-on-mechanisms-of-placental-angiogenesis
#19
Aslı Ozmen, Gozde Unek, Emin Turkay Korgun
The benefits of antenatal glucocorticoid (GC) treatment to promote human fetal lung maturation are well established. However, reports have emerged indicating that maternal exposure to high concentrations of circulating GCs alters placental and fetal development. Because many adult-onset metabolic and cardiovascular disorders have their origins in utero, the importance of prenatal conditions should be considered in detail. Therefore, this review aims to present an overview of the GC effect on placental and fetal development, specifically with regard to mechanisms of placental angiogenesis...
April 2017: Placenta
https://www.readbyqxmd.com/read/28454690/placental-soluble-fms-like-tyrosine-kinase-expression-in-small-for-gestational-age-infants-and-risk-for-adverse-outcomes
#20
Melissa Spiel, Saira Salahuddin, Elizabeth Pernicone, Zsuzsanna Zsengeller, Alice Wang, Anna M Modest, S Ananth Karumanchi, Jonathan L Hecht
INTRODUCTION: Soluble fms-like tyrosine kinase 1 (sFLT-1) is an anti-angiogenic factor implicated in the pathogenesis of preterm preeclampsia. We evaluated sFLT-1 expression and placental pathology in pregnancies complicated by small for gestational age (SGA) infants (<10th percentile), without evidence of preeclampsia. METHODS: Clinical and histologic data were compared between groups with high or low sFLT-1 expression determined by immunohistochemistry on archived placentas...
April 2017: Placenta
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