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https://www.readbyqxmd.com/read/28634705/how-does-pregnancy-affect-the-patients-with-pituitary-adenomas-a-study-on-113-pregnancies-from-turkey
#1
Z Karaca, S Yarman, I Ozbas, P Kadioglu, M Akturk, F Kilicli, H S Dokmetas, R Colak, H Atmaca, Z Canturk, Y Altuntas, N Ozbey, N Hatipoglu, F Tanriverdi, K Unluhizarci, F Kelestimur
OBJECTIVE: Data regarding pregnancies in relation to pituitary tumors are limited. The effects of pregnancy on pituitary adenomas and the effects of adenoma itself (hormonal activity, mass effects and pituitary insufficiency) and/or treatment on the ongoing gestation and developing fetus were evaluated. METHODS: The study was a retrospective study. A questionnaire involving questions regarding medical history before index gestation, history of related pregnancy, result of index gestation and postpartum follow-up of the patients was filled by the investigator in one of the eight Referral Endocrinology Centers from Turkey...
June 20, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28631291/folate-deficiency-disturbs-hsa-let-7-g-level-through-methylation-regulation-in-neural-tube-defects
#2
Li Wang, Shaofang Shangguan, Yu Xin, Shaoyan Chang, Zhen Wang, Xiaolin Lu, Lihua Wu, Bo Niu, Ting Zhang
Folic acid deficiency during pregnancy is believed to be a high-risk factor for neural tube defects (NTDs). Disturbed epigenetic modifications, including miRNA regulation, have been linked to the pathogenesis of NTDs in those with folate deficiency. However, the mechanism by which folic acid-regulated miRNA influences this pathogenesis remains unclear. It is believed that DNA methylation is associated with dysregulated miRNA expression. To clarify this issue, here we measured the methylation changes of 22 miRNAs in 57 human NTD cases to explore whether such changes are involved in miRNA regulation in NTD cases through folate metabolism...
June 19, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28630660/npc-exs-alleviate-endothelial-oxidative-stress-and-dysfunction-through-the-mir-210-downstream-nox2-and-vegfr2-pathways
#3
Hua Liu, Jinju Wang, Yusen Chen, Yanfang Chen, Xiaotang Ma, Ji C Bihl, Yi Yang
We have demonstrated that neural progenitor cells (NPCs) protect endothelial cells (ECs) from oxidative stress. Since exosomes (EXs) can convey the benefit of parent cells through their carried microRNAs (miRs) and miR-210 is ubiquitously expressed with versatile functions, we investigated the role of miR-210 in the effects of NPC-EXs on oxidative stress and dysfunction in ECs. NPCs were transfected with control and miR-210 scramble/inhibitor/mimic to generate NPC-EXs(con), NPC-EXs(sc), NPC-EXs(anti-miR-210), and NPC-EXs(miR-210)...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28628360/genetic-risk-factors-for-folate-responsive-neural-tube-defects
#4
Anne M Molloy, Faith Pangilinan, Lawrence C Brody
Neural tube defects (NTDs) are the most severe congenital malformations of the central nervous system. The etiology is complex, with both genetic and environmental factors having important contributions. Researchers have known for the past two decades that maternal periconceptional use of the B vitamin folic acid can prevent many NTDs. Though this finding is arguably one of the most important recent discoveries in birth defect research, the mechanism by which folic acid exerts this benefit remains unknown. Research to date has focused on the hypothesis that an underlying genetic susceptibility interacts with folate-sensitive metabolic processes at the time of neural tube closure...
June 19, 2017: Annual Review of Nutrition
https://www.readbyqxmd.com/read/28627765/measurement-of-surface-topography-and-stiffness-distribution-on-cross-section-of-xenopus-laevis-tailbud-for-estimation-of-mechanical-environment-in-embryo
#5
Fumiaki Murakami, Yoriko Ando, Asuka Miyagi, Shukei Sugita, Naoto Ueno, Takeo Matsumoto
The stress distribution inside a Xenopus laevis tailbud embryo was estimated to examine the cause of the straightening and elongation. The embryos were cut in the middle, yielding a cross-section perpendicular to the body axis. The section was not flat, owing to the residual stress relief. The stress needed to restore the flatness corresponded to the stress inside the embryo and was calculated using the surface topography and Young's-moduli in the section. We found the areas of the notochord (Nc), neural tube (NT), and abdominal tissue (AT) bulged in the cross-section, which revealed that compressive forces acted in these tissues...
June 19, 2017: Development, Growth & Differentiation
https://www.readbyqxmd.com/read/28625870/pax3-and-pax7-mediated-dbx1-regulation-orchestrates-the-patterning-of-intermediate-spinal-interneurons
#6
Chris Gard, Gloria Gonzalez-Curto, Youcef El-Mokhtar Frarma, Elodie Chollet, Nathalie Duval, Valentine Auzié, Frédéric Auradé, Lisa Vigier, Frédéric Relaix, Alessandra Pierani, Frédéric Causeret, Vanessa Ribes
Transcription factors are key orchestrators of the emergence of neuronal diversity within the developing spinal cord. As such, the two paralogous proteins Pax3 and Pax7 regulate the specification of progenitor cells within the intermediate neural tube, by defining a neat segregation between those fated to form motor circuits and those involved in the integration of sensory inputs. To attain insights into the molecular means by which they control this process, we have performed detailed phenotypic analyses of the intermediate spinal interneurons (IN), namely the dI6, V0D, V0VCG and V1 populations in compound null mutants for Pax3 and Pax7...
June 15, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28624345/lamprey-neural-crest-migration-is-snail-dependent-and-occurs-without-a-differential-shift-in-cadherin-expression
#7
Joshua R York, Tian Yuan, Kevin Zehnder, David W McCauley
The acquisition of neural crest cells was a key step in the origin of the vertebrate body plan. An outstanding question is how neural crest cells acquired their ability to undergo an epithelial-mesenchymal transition (EMT) and migrate extensively throughout the vertebrate embryo. We tested if differential regulation of classical cadherins-a highly conserved feature of neural crest EMT and migration in jawed vertebrates-mediates these cellular behaviors in lamprey, a basal jawless vertebrate. Lamprey has single copies of the type I and type II classical cadherins (CadIA and CadIIA)...
June 14, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28623428/quantitative-measurement-of-pard3-copy-number-variations-in-human-neural-tube-defects
#8
Yonghui Gao, Jianhua Wang, Shaofang Shangguan, Yihua Bao, Xiaoli Lu, Jizhen Zou, Yaohua Dai, Junling Liu, Ting Zhang
Although more than 200 genes are known to be related to neural tube defects (NTDs), the exact molecular basis is still unclear. Evaluating the contribution of copy number variation (CNV) might be a priority because CNV involves changes in the copy number of large segments of DNA, leading to phenotypic traits and disease susceptibility. Recent studies have documented that the polarity protein partitioning defective 3 homolog (Pard3) plays an essential role in the process of neural tube closure. The aim of this study was to assess the role of PARD3 CNVs in the etiology of human NTDs...
June 16, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28621422/a-new-role-of-the-membrane-type-matrix-metalloproteinase-16-mmp16-mt3-mmp-in-neural-crest-cell-migration
#9
Lee Roth, Rotem Kalev-Altman, Efrat Monsonego-Ornan, Dalit Sela-Donenfeld
Neural crest cells (NCCs) are a transient population of neuroectodermal-originated cells that populate the dorsal neural tube (dNT), before migrating and giving rise to multiple cell lineages in the developing embryo. Prior to their migration, NCCs undergo epithelial-to-mesenchymal-transition (EMT) through which they lose cell contacts and detach from the dNT to invade their surrounding environment. Multiple signals and transcription factors have been identified to regulate these events. Yet, less is known regarding effectors that act downstream to execute the actual NCC separation and migration...
2017: International Journal of Developmental Biology
https://www.readbyqxmd.com/read/28621421/roles-of-dscam-in-axonal-decussation-and-fasciculation-of-chick-spinal-interneurons
#10
Oksana Cohen, Lilach Vald, Masahito Yamagata, Joshua R Sanes, Avihu Klar
The ventral midline of the embryonic neural tube, the floor plate, has a profound role in guiding axons during embryonic development. Floor plate-derived guidance cues attract or repel axons, depending on the neuronal subtype and developmental stage. Netrin-1 and its receptor, Deleted in Colon Carcinoma (DCC), are the key constituents of commissurral axons guidance cues toward the floor plate. Recent studies have implicated Down Syndrome Cell Adhesion Molecule (Dscam) as an additional Netrin-1 receptor. In this study, we examined the role of Dscam in guiding defined spinal dorsal interneuron populations...
2017: International Journal of Developmental Biology
https://www.readbyqxmd.com/read/28621417/cell-fate-decisions-during-neural-crest-ontogeny
#11
Chaya Kalcheim, Deepak Kumar
The neural crest (NC) originates in the central nervous system (CNS) primordium. Born as an epithelium, NC progenitors undergo an epithelial-to-mesenchymal transition that generates cellular movement away from the CNS. Mesenchymal NC progenitors then migrate through stereotypic pathways characteristic of various axial levels until homing to distinct primordia where phenotypic differentiation takes place. Being the source of most of the peripheral nervous system, pigment cells and ectomesenchyme, the embryonic NC is considered to be a multipotent population of precursors...
2017: International Journal of Developmental Biology
https://www.readbyqxmd.com/read/28618200/ambient-and-dosed-exposure-to-quaternary-ammonium-disinfectants-causes-neural-tube-defects-in-rodents
#12
Terry C Hrubec, Vanessa E Melin, Caroline S Shea, Elizabeth E Ferguson, Craig Garofola, Claire M Repine, Tyler W Chapman, Hiral R Patel, Reza M Razvi, Jesse E Sugrue, Haritha Potineni, Geraldine Magnin-Bissel, Patricia A Hunt
BACKGROUND: Quaternary ammonium compounds are a large class of chemicals used for their antimicrobial and antistatic properties. Two common quaternary ammonium compounds, alkyldimethylbenzyl ammonium chloride (ADBAC) and didecyldimethyl ammonium chloride (DDAC), are combined in common cleaners and disinfectants. Introduction of a cleaner containing ADBAC+DDAC in the vivarium caused neural tube defects (NTDs) in mice and rats. METHODS: To further evaluate this finding, male and female mice were dosed in the feed at 60 or 120 mg/kg/day, or by oral gavage at 7...
June 15, 2017: Birth defects research
https://www.readbyqxmd.com/read/28617970/trends-in-the-prevalence-of-neural-tube-defects-a-tale-of-two-policies
#13
Babak Khoshnood, Nathalie Lelong
No abstract text is available yet for this article.
June 15, 2017: Paediatric and Perinatal Epidemiology
https://www.readbyqxmd.com/read/28617257/do-italian-pregnant-women-use-periconceptional-folate-supplementation
#14
Alice Maraschini, Paola D'Aloja, Ilaria Lega, Marta Buoncristiano, Ursula Kirchmayer, Martina Ventura, Serena Donati
INTRODUCTION: Deficiency of folic acid (FA) has been identified as a risk factor for neural tube defects (NTDs) as well as other congenital anomalies. Thus, periconceptional folate supplementation is recommended for all women planning to get pregnant. METHODS: We conducted a KAP (knowledge, attitude, practice) survey to investigate the use of FA and its appropriateness. The survey included a sample of 562 women who delivered in the Lazio region between 2013 and 2014...
April 2017: Annali Dell'Istituto Superiore di Sanità
https://www.readbyqxmd.com/read/28615372/preconception-micronutrient-supplementation-with-iron-and-folic-acid-compared-with-folic-acid-alone-affects-linear-growth-and-fine-motor-development-at-2-years-of-age-a-randomized-controlled-trial-in-vietnam
#15
Phuong H Nguyen, Ines Gonzalez-Casanova, Melissa F Young, Truong Viet Truong, Hue Hoang, Huong Nguyen, Son Nguyen, Ann M DiGirolamo, Reynaldo Martorell, Usha Ramakrishnan
Background: Maternal health and nutrition play a crucial role in early child growth and development. However, little is known about the benefits of preconception micronutrient interventions beyond the role of folic acid (FA) and neural tube defects.Objective: We evaluated the impact of weekly preconception multiple micronutrient (MM) or iron and folic acid (IFA) supplementation on child growth and development through the age of 2 y compared with FA alone.Methods: We followed 1599 offspring born to women who participated in a randomized controlled trial of preconception supplementation in Vietnam...
June 14, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28607062/biomechanical-coupling-facilitates-spinal-neural-tube-closure-in-mouse-embryos
#16
Gabriel L Galea, Young-June Cho, Gauden Galea, Matteo A Molè, Ana Rolo, Dawn Savery, Dale Moulding, Lucy H Culshaw, Evanthia Nikolopoulou, Nicholas D E Greene, Andrew J Copp
Neural tube (NT) formation in the spinal region of the mammalian embryo involves a wave of "zippering" that passes down the elongating spinal axis, uniting the neural fold tips in the dorsal midline. Failure of this closure process leads to open spina bifida, a common cause of severe neurologic disability in humans. Here, we combined a tissue-level strain-mapping workflow with laser ablation of live-imaged mouse embryos to investigate the biomechanics of mammalian spinal closure. Ablation of the zippering point at the embryonic dorsal midline causes far-reaching, rapid separation of the elevating neural folds...
June 12, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28606934/cell-lineage-of-timed-cohorts-of-tbx6-expressing-cells-in-wild-type-and-tbx6-mutant-embryos
#17
Daniel Concepcion, Andrew J Washkowitz, Akiko DeSantis, Phillip Ogea, Jason I Yang, Nataki C Douglas, Virginia E Papaioannou
Tbx6 is a T-box transcription factor with multiple roles in embryonic development as evidenced by dramatic effects on mesoderm cell fate determination, left/right axis determination, and somite segmentation in mutant mice. The expression of Tbx6 is restricted to the primitive streak and presomitic mesoderm, but some of the phenotypic features of mutants are not easily explained by this expression pattern. We have used genetically-inducible fate mapping to trace the fate of Tbx6-expressing cells in wild type and mutant embryos to explain some of the puzzling features of the mutant phenotype...
June 12, 2017: Biology Open
https://www.readbyqxmd.com/read/28603928/the-nutritional-role-of-folate
#18
REVIEW
Shuhei Ebara
Folate functions as a coenzyme to transfer one-carbon units that are necessary for deoxythymidylate synthesis, purine synthesis, and various methylation reactions. Ingested folate becomes a functional molecule through intestinal absorption, circulation, transport to cells, and various modifications to its structure. Associations between nutritional folate status and chronic diseases such as cardiovascular disease, cancer, and cognitive dysfunction have been reported. It has also been reported that maternal folate nutritional status is related to the risk of neural tube defects (NTDs) in the offspring...
June 11, 2017: Congenital Anomalies
https://www.readbyqxmd.com/read/28602745/effect-of-systemic-estradiol-administration-on-tail-hiding-behavior-and-cfos-expression-of-brain-areas-in-female-rats-exposed-to-cold-environment
#19
Yuki Uchida, Kei Nagashima, Kazunari Yuri
Rats place their tails underneath their body trunks in the cold (tail-hiding behavior), which is a new behavioral indicator of thermoregulation in the cold. The aim of the present study was to elucidate the effect of estradiol (E2) on tail-hiding behavior and neural activity in brain areas in the cold. Ovariectomized rats were implanted with a silastic tube with or without E2 underneath the dorsal skin (E2 (-) and E2 (+) groups), and exposed to 27°C, 16°C, and 10°C for 2 hours with continuous body temperature (Tb), tail skin temperature (Ttail), and behavioral measurements...
June 8, 2017: Brain Research
https://www.readbyqxmd.com/read/28600640/deep-convolutional-neural-networks-for-endotracheal-tube-position-and-x-ray-image-classification-challenges-and-opportunities
#20
Paras Lakhani
The goal of this study is to evaluate the efficacy of deep convolutional neural networks (DCNNs) in differentiating subtle, intermediate, and more obvious image differences in radiography. Three different datasets were created, which included presence/absence of the endotracheal (ET) tube (n = 300), low/normal position of the ET tube (n = 300), and chest/abdominal radiographs (n = 120). The datasets were split into training, validation, and test. Both untrained and pre-trained deep neural networks were employed, including AlexNet and GoogLeNet classifiers, using the Caffe framework...
June 9, 2017: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
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