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Placenta

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https://www.readbyqxmd.com/read/28817576/gestational-diabetes-mellitus-is-associated-with-increased-pro-migratory-activation-of-vascular-endothelial-growth-factor-receptor-2-and-reduced-expression-of-vascular-endothelial-growth-factor-receptor-1
#1
Felipe Troncoso, Jesenia Acurio, Kurt Herlitz, Claudio Aguayo, Patricio Bertoglia, Enrique Guzman-Gutierrez, Marco Loyola, Marcelo Gonzalez, Meriem Rezgaoui, Gernot Desoye, Carlos Escudero
Placentas from gestational diabetes mellitus (GDM) are often hypervascularized; however, participation of vascular endothelial growth factor (VEGF) and its receptors in this placental adaptation is unclear. We aimed to test whether changes in phosphorylation of tyrosine 951 or tyrosine 1175 (pY951 or pY1175) of the vascular endothelial growth factor receptor 2 (KDR) are associated with the proangiogenic state observed in placentas from GDM. We obtained placental samples from women with normal pregnancies (n = 24) or GDM (n = 18)...
2017: PloS One
https://www.readbyqxmd.com/read/28817493/dna-methylation-of-the-glucocorticoid-receptor-gene-promoter-in-the-placenta-is-associated-with-blood-pressure-regulation-in-human-pregnancy
#2
Sulistyo E Dwi Putra, Christoph Reichetzeder, Martin Meixner, Karsten Liere, Torsten Slowinski, Berthold Hocher
BACKGROUND: Blood pressure (BP) regulation during pregnancy is influenced by hormones of placental origin. It was shown that the glucocorticoid system is altered in hypertensive pregnancy disorders such as preeclampsia. Epigenetic mechanism might influence the activity of genes involved in placental hormone/hormone receptor synthesis/action during pregnancy. METHOD: In the current study, we analyzed the association of 5'-C-phosphate-G-3' (CpG) site methylation of different glucocorticoid receptor gene (NR3C1) promoter regions with BP during pregnancy...
August 16, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28816071/do-the-physiological-aging-of-the-placenta-and-the-changes-in-angiogenesis-marker-sflt-1-and-plgf-concentrations-predispose-patients-to-late-onset-preeclampsia
#3
Sebastian Kwiatkowski, Barbara Dołęgowska, Kwiatkowska Ewa, Rafał Rzepka, Natalia Marczuk, Beata Loj, Wioletta Mikolajek-Bedner, Andrzej Torbe
No abstract text is available yet for this article.
August 17, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28815596/use-of-first-trimester-placenta-growth-factor-concentration-to-predict-hypertensive-disorders-of-pregnancy-in-a-low-risk-asian-population
#4
Manisha Kumar, Karuna Sharma, Shalini Singh, Ritu Singh, Abha Singh, Jayashree Bhattacharjee
OBJECTIVE: To determine the value of placenta growth factor (PlGF) for predicting hypertensive disorders of pregnancy (HDP) in a low-risk population when used either alone or in combination with other markers. METHODS: A prospective observational cohort study was conducted among women with singleton pregnancy in the first trimester in New Delhi, India, between October 1, 2013, and September 30, 2016. First-trimester measures included maternal history, body mass index (BMI), mean arterial pressure (MAP), Doppler uterine artery pulsatility index, and serum levels of biomarkers (including PlGF)...
August 17, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28813271/prenatal-parenting
#5
REVIEW
Vivette Glover, Lauren Capron
Parenting begins before birth. This includes prenatal maternal and paternal bonding with the baby, and biological effects on fetal development. Recent research has confirmed how prenatal maternal stress can alter the development of the fetus and the child, and that this can persist until early adulthood. Children are affected in different ways depending, in part, on their own genetic makeup. The fetus may also have a direct effect on prenatal maternal mood and later parenting behaviour via the placenta. The father is important prenatally too...
June 2017: Current Opinion in Psychology
https://www.readbyqxmd.com/read/28812655/the-placenta-as-a-model-for-understanding-the-origin-and-evolution-of-vertebrate-organs
#6
REVIEW
Oliver W Griffith, Günter P Wagner
How organs originate and evolve is a question fundamental to understanding the evolution of complex multicellular life forms. Vertebrates have a relatively standard body plan with more or less the same conserved set of organs. The placenta is a comparatively more recently evolved organ, derived in many lineages independently. Using placentas as a model, we discuss the genetic basis for organ origins. We show that the evolution of placentas occurs by acquiring new functional attributes to existing tissues, changes in the patterning and development of tissues, and the evolution of novel cell types...
March 23, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812469/placental-pathologic-associations-with-morbidly-adherent-placenta-potential-insights-into-pathogenesis
#7
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/28811141/the-pharmacokinetic-profile-of-synthetic-cathinones-in-a-pregnancy-model
#8
Lauren G Strange, Kerri Kochelek, Robert Keasling, Stacy D Brown, Brooks B Pond
In recent years, the abuse of synthetic cathinones or 'bath salts' has become a major public health concern. Although these compounds were initially sold legally and labeled "not for human consumption", the 'bath salts' are psychostimulants, with similar structures and pharmacologic mechanisms to cocaine, the amphetamines, and 3,4 methylendioxymethamphetamine (MDMA, Molly, or Ecstasy). The reported use of these substances by women of child-bearing age highlights the necessity of studies seeking to delineate risks of prenatal exposure...
August 12, 2017: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/28809844/the-4-vessel-sampling-approach-to-integrative-studies-of-human-placental-physiology-in-vivo
#9
Ane M Holme, Maia B Holm, Marie C P Roland, Hildegunn Horne, Trond M Michelsen, Guttorm Haugen, Tore Henriksen
The human placenta is highly inaccessible for research while still in utero. The current understanding of human placental physiology in vivo is therefore largely based on animal studies, despite the high diversity among species in placental anatomy, hemodynamics and duration of the pregnancy. The vast majority of human placenta studies are ex vivo perfusion studies or in vitro trophoblast studies. Although in vitro studies and animal models are essential, extrapolation of the results from such studies to the human placenta in vivo is uncertain...
August 2, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28808448/relevance-of-the-nr4a-sub-family-of-nuclear-orphan-receptors-in-trophoblastic-bewo-cell-differentiation
#10
Sudha Saryu Malhotra, Satish Kumar Gupta
Nur-77, a member of the NR4A sub-family of nuclear orphan receptors, is downregulated in the placentae of pre-eclamptic women. Here, we investigate the relevance of Nor-1, Nurr-1 and Nur-77 in trophoblastic cell differentiation. Their transcript levels were found to be significantly upregulated in BeWo cells treated with forskolin. The maximum increase was observed after 2 h, with a second peak in the expression levels after 48 h. The expression of NR4A sub-family members was also found to be upregulated in BeWo cells after treatment with hCG and GnRH...
2017: Cellular & Molecular Biology Letters
https://www.readbyqxmd.com/read/28808304/hypoxia-induced-tet1-facilitates-trophoblast-cell-migration-and-invasion-through-hif1%C3%AE-signaling-pathway
#11
Jingping Zhu, Kai Wang, Ting Li, Jiayu Chen, Dandan Xie, Xinwen Chang, Julei Yao, Jinting Wu, Qian Zhou, Yuanhui Jia, Tao Duan
Low oxygen is a typical extrinsic factor for the regulation of trophoblast biological function, including cell migration, invasion and proliferation. Ten-eleven translocation methylcytosine dioxygenase 1 (TET1), an enzyme converting 5-methylcytosine (5-mC) to 5-hydroxymethylcytosine (5-hmC), is transcriptionally activated by hypoxia in cancer cells. Therefore, we focus on the role of TET1 on trophoblast function in a physiologically hypoxic environment (3% oxygen), which is related to early placentation. Here, we found that TET1 was highly expressed in first trimester villi compared with normal term placentas...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807280/immunization-with-inactivated-antigens-of-neospora-caninum-induces-toll-like-receptors-3-7-8-and-9-in-maternal-fetal-interface-of-infected-pregnant-heifers
#12
M S Marin, Y P Hecker, S Quintana, S E Pérez, M R Leunda, G J Cantón, E R Cobo, D P Moore, A C Odeón
Neospora caninum is an obligate parasite and a major cause of abortion in cattle. Pregnancy failures appear to be associated with weak innate defences on the maternal-fetal interface during infection with N. caninum. Herein, we studied the gene expression of Toll-like receptors (TLRs) in pregnant heifers immunized with different vaccine formulations against N. caninum before mating and then challenged the heifers with live N. caninum on day 70 of gestation. TLR7 and TLR8 expression was upregulated in the placental caruncle of infected-pregnant heifers previously exposed to live N...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28806624/bcl-2-bax-protein-and-mrna-expression-in-yak-bos-grunniens-placentomes
#13
JiangFeng Fan, SiJiu Yu, Yan Cui, Gengquan Xu, Libin Wang, Yangyang Pan, Honghong He
Placental function is complex and influenced by various factors; furthermore, it depends on a delicate balance between cell proliferation, cell differentiation, and cell death. Bcl-2 and Bax proteins are key apoptosis regulators and are considered to play an important role in the maintenance of both dynamic balance and integrity of many tissues. Changes in Bcl-2 and Bax expressions have been described during different developmental stages in normal human placentas. Studies furthermore indicated several pathological placental changes to be related to abnormal Bcl-2 and Bax expressions...
July 29, 2017: Theriogenology
https://www.readbyqxmd.com/read/28806286/aortic-balloon-occlusion-and-placenta-percreta-some-concerns-and-clarifications
#14
Shigeki Matsubara
No abstract text is available yet for this article.
August 12, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28806168/mapping-the-mouse-allelome-reveals-tissue-specific-regulation-of-allelic-expression
#15
Daniel Andergassen, Christoph P Dotter, Daniel Wenzel, Verena Sigl, Philipp C Bammer, Markus Muckenhuber, Daniela Mayer, Tomasz M Kulinski, Hans-Christian Theussl, Josef M Penninger, Christoph Bock, Denise P Barlow, Florian M Pauler, Quanah J Hudson
To determine the dynamics of allelic-specific expression during mouse development, we analyzed RNA-seq data from 23 F1 tissues from different developmental stages, including 19 female tissues allowing X chromosome inactivation (XCI) escapers to also be detected. We demonstrate that allelic expression arising from genetic or epigenetic differences is highly tissue-specific. We find that tissue-specific strain-biased gene expression may be regulated by tissue-specific enhancers or by post-transcriptional differences in stability between the alleles...
August 14, 2017: ELife
https://www.readbyqxmd.com/read/28805942/maternal-and-neonatal-outcomes-following-abnormally-invasive-placenta-a-population-based-record-linkage-study
#16
Heather J Baldwin, Jillian A Patterson, Tanya A Nippita, Siranda Torvaldsen, Ibinabo Ibiebele, Judy M Simpson, Jane B Ford
INTRODUCTION: Abnormally invasive placenta (AIP) involves abnormal adherence of the placenta to the myometrium, and is associated with severe pregnancy complications such as blood transfusion and hysterectomy. Knowledge of outcomes has been limited by small sample sizes and a focus on maternal rather than neonatal outcomes. This study uses population-level data collected over ten years to investigate maternal and neonatal outcomes and trends in incidence of AIP (also known as placenta accreta, increta and percreta)...
August 14, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28805619/intrauterine-fetal-death-caused-by-seatbelt-injury
#17
Shizuka Yamada, Koji Nishijima, Jin Takahashi, Nozomu Takahashi, Chiyo Tamamura, Yoshio Yoshida
OBJECTIVE: Severe motor vehicle accidents involving pregnant women can result in fetal and neonatal death. We describe a case in which fetal death occurred due to relatively mild seatbelt injuries and present the characteristic magnetic resonance imaging (MRI) findings of the placenta. CASE REPORT: A 26-year-old primigravid woman at 20 weeks gestation was involved in an automobile accident. Although she suffered only a seatbelt injury, fetal death subsequently occurred...
August 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28805614/pregnancy-with-asymptomatic-uterine-complete-rupture-after-uterine-artery-embolization-for-postpartum-hemorrhage
#18
Hiroaki Soyama, Morikazu Miyamoto, Hidenori Sasa, Hiroki Ishibashi, Masashi Takano, Kenichi Furuya
OBJECTIVE: Uterine artery embolization has become an effective treatment for postpartum hemorrhage. The safety of pregnancy after uterine artery embolization for postpartum hemorrhage has been established. CASE REPORT: We present the case of a pregnant woman with asymptomatic uterine complete rupture who underwent uterine artery embolization for a previous placenta previa. She had not been diagnosed with uterine rupture until cesarean section was performed, and fortunately, we obtained the best maternal and neonatal outcomes...
August 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28805608/the-utility-and-effectiveness-of-an-internal-iliac-artery-balloon-occlusion-catheter-in-surgery-for-large-cervical-uterine-fibroids
#19
Hiroshi Kaneda, Yasuhisa Terao, Yuko Matsuda, Kazunari Fujino, Takafumi Ujihira, Soshi Kusunoki, Miki Kimura, Akihiko Shiraishi, Ryohei Kuwatsuru, Satoru Takeda
OBJECTIVE: Surgery for uterine cervical fibroids is difficult because of restricted surgical access and risks such as intraoperative bleeding or injury to other organs. The internal iliac artery balloon occlusion catheter (IIABOC) provides effective hemostasis for placenta previa and atonic hemorrhage, and is increasingly used in surgery for uterine fibroids for controlling intraoperative hemorrhage. We investigated the efficacy and safety of the IIABOC for controlling intraoperative bleeding in total abdominal hysterectomies (TAH) and abdominal myomectomies (AM) for large cervical fibroids...
August 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28804687/zika-virus-zikv-a-review-of-proposed-mechanisms-of-transmission-and-associated-congenital-abnormalities
#20
Sruti K Desai, Steven D Hartman, Shilpa Jayarajan, Stephanie Liu, G Ian Gallicano
Zika virus (ZIKV) has been of major international public health concern following large outbreaks in the Americas occurring in 2015-2016. Most notably, ZIKV has been seen to pose dangers in pregnancy due to its association with congenital abnormalities such as microcephaly. Numerous experimental approaches have been taken to address how the virus can cross the placenta, alter normal fetal development, and disrupt specific cellular functions. Many areas concerning the mechanisms of transmission, especially from mother to fetus, are largely unknown but demand further research...
2017: American Journal of Stem Cells
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