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Growth restriction

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https://www.readbyqxmd.com/read/29351845/a-precise-cdk-activity-threshold-determines-passage-through-the-restriction-point
#1
Clayton Schwarz, Amy Johnson, Mardo Kõivomägi, Evgeny Zatulovskiy, Carolyn J Kravitz, Andreas Doncic, Jan M Skotheim
At the restriction point (R), mammalian cells irreversibly commit to divide. R has been viewed as a point in G1 that is passed when growth factor signaling initiates a positive feedback loop of Cdk activity. However, recent studies have cast doubt on this model by claiming R occurs prior to positive feedback activation in G1 or even before completion of the previous cell cycle. Here we reconcile these results and show that whereas many commonly used cell lines do not exhibit a G1 R, primary fibroblasts have a G1 R that is defined by a precise Cdk activity threshold and the activation of cell-cycle-dependent transcription...
January 18, 2018: Molecular Cell
https://www.readbyqxmd.com/read/29351603/the-unexpected-function-of-a-flavin-dependent-oxidoreductase-fox-from-variovorax-paradoxus-tbea6
#2
Christina Meinert, Marc Schürmann, Jan-Eike Domeyer, Anja Poehlein, Rolf Daniel, Alexander Steinbüchel
3,3'-Thiodipropionic acid (TDP) is used as an additive in food and cosmetic industry and as precursor substrate for biotechnical polythioester production. Its catabolism was investigated in Variovorax paradoxus TBEA6 previous to this study. It was reported that the insertion of the transposon Tn5::mob into a gene showing high homology to flavin-dependent oxidoreductases (fox) resulted in impaired growth with TDP. Therefore, it was assumed that the initial cleavage of TDP is catalyzed by an FAD-dependent oxidoreductase (Fox, VPARA_05580)...
January 17, 2018: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/29351580/maternal-nutrient-restriction-impairs-young-adult-offspring-ovarian-signaling-resulting-in-reproductive-dysfunction-and-follicle-loss
#3
K A Chan, P A Jazwiec, W Gohir, J J Petrik, D M Sloboda
Reproductive abnormalities are included as health complications in offspring exposed to poor prenatal nutrition. We have previously shown in a rodent model, that offspring born to nutrient restriction during pregnancy are born small, enter puberty early, and display characteristics of early ovarian aging as adults. The present study investigated whether key proteins involved in follicle recruitment and growth mediate ovarian follicle loss. Pregnant rats were randomized to: a standard diet throughout pregnancy and lactation (CON), or a calorie-restricted (50% of control) diet (UN) during pregnancy...
January 17, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29351577/effects-of-excess-thromboxane-a2-on-placental-development-and-nutrient-transporters-in-a-mus-musculus-model-of-fetal-growth-restriction
#4
Karen J Gibbins, Katherine N Gibson-Corley, Ashley S Brown, Matthew Wieben, Richard C Law, Camille M Fung
Hypertensive disease of pregnancy (HDP) with placental insufficiency is the most common cause of fetal growth restriction (FGR) in the developed world. Despite the known negative consequences of HDP both to the mother and fetus, little is known about the longitudinal placental changes that occur as HDP progresses in pregnancy. This is because longitudinal sampling of human placentae during each gestation is impossible. Therefore, using a mouse model of thromboxane A2-analog infusion to mimic human HDP in the last trimester, we calculated placental efficiencies based on fetal and placental weights, quantified spongiotrophoblast and labyrinth thicknesses and vascular density within these layers, examined whether hypoxia signaling pathway involving vascular endothelial growth factor A (VEGFA) and its receptors (VEGFR1, VEGFR2) and matrix metalloproteinases (MMPs) contributed to vascular change, and examined nutrient transporter abundance including glucose transporters 1 and 3 (GLUT1, GLUT3), neutral amino acid transporters 1, 2, and 4 (SNAT1, SNAT2, and SNAT4), fatty acid transporters 2 and 4 (FATP2, FATP4) and fatty acid translocase (CD36) from embryonic day 15...
January 17, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29351561/preconception-use-of-cart-by-hiv-positive-pregnant-women-increases-the-risk-of-infants-being-born-small-for-gestational-age
#5
Ingrid J M Snijdewind, Colette Smit, Mieke H Godfried, Rachel Bakker, Jeannine F J B Nellen, Vincent W V Jaddoe, Elisabeth van Leeuwen, Peter Reiss, Eric A P Steegers, Marchina E van der Ende
BACKGROUND: The benefits of combination anti-retroviral therapy (cART) in HIV-positive pregnant women (improved maternal health and prevention of mother to child transmission [pMTCT]) currently outweigh the adverse effects due to cART. As the variety of cART increases, however, the question arises as to which type of cART is safest for pregnant women and women of childbearing age. We studied the effect of timing and exposure to different classes of cART on adverse birth outcomes in a large HIV cohort in the Netherlands...
2018: PloS One
https://www.readbyqxmd.com/read/29351431/feasibility-of-phase-contrast-cine-magnetic-resonance-imaging-for-measuring-blood-flow-in-the-sheep-fetus
#6
An Qi Duan, Jack R T Darby, Jia Yin Soo, Mitchell C Lock, Meng Yuan Zhu, Lucy V Flynn, Sunthara Rajan Perumal, Christopher K Macgowan, Joseph B Selvanayagam, Janna L Morrison, Mike Seed
Phase-contrast cine MRI (PC-MRI) is the gold-standard non-invasive technique for measuring vessel blood flow and has previously been applied in the human fetal circulation. We aimed to assess the feasibility of using PC-MRI to define the distribution of the fetal circulation in sheep. Fetuses were catheterized at 119-120 days gestation (term, 150 days) and underwent MRI at 123 days gestation under isoflurane anesthesia, ventilated at a FiO2 of 1.0. PC-MRI was performed using a fetal arterial blood pressure catheter signal for cardiac triggering...
December 13, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29351419/maternal-nutrient-restriction-in-guinea-pigs-as-an-animal-model-for-studying-growth-restricted-offspring-with-post-natal-catch-up-growth
#7
Catherine L Nevin, Evan Formosa, Yohei Maki, Brad Matushewski, Timothy R H Regnault, Bryan S Richardson
We determined the impact of moderate maternal nutrient restriction (MNR) in guinea pigs with fetal growth restriction (FGR) on offspring body and organ weights, hypothesizing that FGR-MNR animals will show catch-up growth, but with organ-specific differences. Guinea pig sows were fed ad libitum (Control) or 70% of the control diet from 4 week`s pre-conception, switching to 90% at mid-pregnancy (MNR). Control newborns >95g (appropriate for gestational age or AGA, N=37) and MNR newborns <85g (FGR, N=37) were monitored until neonatal (~25 days) or adult (~110 days) necropsy...
January 10, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29351292/allocation-of-distinct-organ-fates-from-a-precursor-field-requires-a-shift-in-expression-and-function-of-gene-regulatory-networks
#8
Sneha Palliyil, Jinjin Zhu, Luke R Baker, Sarah D Neuman, Arash Bashirullah, Justin P Kumar
A common occurrence in metazoan development is the rise of multiple tissues/organs from a single uniform precursor field. One example is the anterior forebrain of vertebrates, which produces the eyes, hypothalamus, diencephalon, and telencephalon. Another instance is the Drosophila wing disc, which generates the adult wing blade, the hinge, and the thorax. Gene regulatory networks (GRNs) that are comprised of signaling pathways and batteries of transcription factors parcel the undifferentiated field into discrete territories...
January 19, 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29350662/high-protein-intake-in-human-maternal-milk-fortification-for-%C3%A2-1250-gr-infants-intrahospital-growth-and-neurodevelopmental-outcome-at-two-years
#9
Augusto Biasini, Fiorella Monti, Maria Chiara Laguardia, Marcello Stella, Lucia Marvulli, Erica Neri
BACKGROUND AND AIM OF THE STUDY: Extrauterine growth restriction and failure to thrive remain a major problem in Extremely Low Birth Weight infants. Nutritional support in preterm babies has the objective to improve the achieve rate of growth similar to those of the fetus in utero at the equivalent gestational age. The aim of the study was to evaluate feeding tolerance, intrahospital growth, neurological outcome and anthropometric data until 24 months of corrected age (mca) from different protein intake assumed by preterm babies <1250 g during their stay in NICU...
January 16, 2018: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29348829/roflumilast-restores-camp-pka-creb-signaling-axis-for-ftmt-mediated-tumor-inhibition-of-ovarian-cancer
#10
Shipeng Gong, Yongning Chen, Fanliang Meng, Yadi Zhang, Huan Wu, Fei Wu
The abrogation of cAMP generation by overexpression of PDE isoforms promotes the inflammatory pathology, and the PDE inhibitors have showed the potential anti-inflammation effects in clinical. However, the function of PDE inhibitors in cancer treatment remains unclear. We here investigated the role of PDE4 inhibitor Roflumilast in the treatment of ovarian cancer. We found that Roflumilast could effectively inhibit the proliferation, and induce apoptosis and cell cycle arrest in two ovarian cancer cell lines OVCAR3 and SKOV3...
December 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/29348547/high-strength-nanostructured-al-based-alloys-through-optimized-processing-of-rapidly-quenched-amorphous-precursors
#11
Song-Yi Kim, Gwang-Yeob Lee, Gyu-Hyeon Park, Hyeon-Ah Kim, A-Young Lee, Sergio Scudino, Konda Gokuldoss Prashanth, Do-Hyang Kim, Jürgen Eckert, Min-Ha Lee
We report the methods increasing both strength and ductility of aluminum alloys transformed from amorphous precursor. The mechanical properties of bulk samples produced by spark-plasma sintering (SPS) of amorphous Al-Ni-Co-Dy powders at temperatures above 673 K are significantly enhanced by in-situ crystallization of nano-scale intermetallic compounds during the SPS process. The spark plasma sintered Al84Ni7Co3Dy6 bulk specimens exhibit 1433 MPa compressive yield strength and 1773 MPa maximum strength together with 5...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29348396/a-case-of-umbilical-artery-thrombosis-in-the-third-trimester-of-pregnancy
#12
Fouad Lutfallah, Nina Oufkir, Georges A Markou, Delphine Frimigacci, Christophe Poncelet
BACKGROUND Umbilical artery thrombosis is an extremely rare complication during pregnancy. Umbilical artery thrombosis has a poor prognosis and is associated with increased rates of perinatal morbidity, including intrauterine growth restriction (IUGR), and fetal mortality. CASE REPORT We report a rare case of umbilical artery thrombosis, diagnosed by ultrasound, at 33 weeks gestation in a 30-year-old woman who had previously had an uneventful pregnancy. CONCLUSIONS Umbilical artery thrombosis is a rare complication of pregnancy that is associated with high fetal mortality...
January 19, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29346601/accumulation-of-mutational-load-at-the-edges-of-a-species-range
#13
Yvonne Willi, Marco Fracassetti, Stefan Zoller, Josh Van Buskirk
Why species have geographically restricted distributions is an unresolved question in ecology and evolutionary biology. Here we test a new explanation, that mutation accumulation due to small population size or a history of range expansion can contribute to restricting distributions by reducing population growth rate at the edge. We examined genomic diversity and mutational load across the entire geographic range of the North American plant Arabidopsis lyrata, including old, isolated populations predominantly at the southern edge and regions of postglacial range expansion at the northern and southern edges...
January 15, 2018: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/29346528/a-novel-stromal-lncrna-signature-reprograms-fibroblasts-to-promote-the-growth-of-oral-squamous-cell-carcinoma-via-lncrna-caf-interleukin-33
#14
Liang Ding, Jing Ren, Dongya Zhang, Yi Li, Xiaofeng Huang, Qingang Hu, Hui Wang, Yuxian Song, Yanhong Ni, Yayi Hou
Stromal carcinoma-related fibroblasts (CAFs) are the main type of non-immune cells in the tumor microenvironment (TME). CAFs interact with cancer cells to promote tumor proliferation. Long non-coding RNAs (lncRNAs) are known to regulate cell growth, apoptosis, and metastasis of cancer cells, but their role in stromal cells is unclear. Using RNA sequencing, we identified a stromal lncRNA signature during the transformation of CAFs from normal fibroblasts (NFs) in oral squamous cell carcinoma (OSCC). We uncovered an uncharacterized lncRNA, FLJ22447, which was remarkably up-regulated in CAFs, referred to LncRNA-CAF (Lnc-CAF) hereafter...
January 13, 2018: Carcinogenesis
https://www.readbyqxmd.com/read/29346146/use-of-oxidized-regenerated-cellulose-collagen-matrix-in-chronic-diabetic-foot-ulcers-a-systematic-review
#15
Gisele Chicone, Viviane Fernandes de Carvalho, André Oliveira Paggiaro
OBJECTIVE: Diabetic wounds that do not heal completely usually exhibit inflammatory markers, increased protease activity, and reduced levels of growth factors and cell count. A systematic review was performed to determine whether there is enough evidence to support the use of an oxidized regenerated cellulose/collagen matrix (ORC+C) to treat diabetic foot ulcers (DFUs). METHODS: Study authors analyzed randomized controlled trials (RCTs) on ORC+C dressings for the treatment of DFUs...
February 2018: Advances in Skin & Wound Care
https://www.readbyqxmd.com/read/29345287/intermittent-calorie-restriction-enhances-epithelial-mesenchymal-transition-through-the-alteration-of-energy-metabolism-in-a-mouse-tumor-model
#16
Osamu Kusuoka, Rina Fujiwara-Tani, Chie Nakashima, Kiyomu Fujii, Hitoshi Ohmori, Takuya Mori, Shingo Kishi, Yoshihiro Miyagawa, Kei Goto, Isao Kawahara, Hiroki Kuniyasu
The effect of intermittent calorie restriction (ICR) on cancer is controversial. In this study, we examined the effects of ICR and food content in syngeneic BALB/c mice injected with CT26 mouse colon cancer cells. Mice were subjected to 24-h fasting once a week for 4 weeks, and then provided with a control, high-calorie, or trans fatty acid-rich diet. While ICR resulted in increases in tumor weights, metastasis and in the number of cancer stem cells (CSCs) in the tumors or blood of mice fed the control and high-fat diets, it had no effect on body weight after 4 weeks...
February 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29344838/association-between-human-brucellosis-and-adverse-pregnancy-outcome-a-cross-sectional-population-based-study
#17
Nesrin Ghanem-Zoubi, Silvia Pessah Eljay, Emilia Anis, Mical Paul
To investigate the association between the incidence of human brucellosis (HB) and adverse pregnancy outcomes (APOs), a population-based, cross-sectional aggregate data study was conducted in Israel between 2010 and 2014. HB-endemic localities were matched by ethnicity, population size and socioeconomic status to localities with a low incidence of HB. We compared APO rates in high-incidence vs low-incidence localities. The primary outcome was intrauterine fetal demise (IUFD). Secondary outcomes were premature birth (less than 37 weeks), early or threatened labour and poor fetal growth...
January 17, 2018: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29344814/nutritional-therapy-in-autosomal-dominant-polycystic-kidney-disease
#18
REVIEW
Biagio R Di Iorio, Adamasco Cupisti, Claudia D'Alessandro, Antonio Bellasi, Vincenzo Barbera, Luca Di Lullo
CKD-related nutritional therapy (NT) is a crucial cornerstone of CKD patients' treatment, but the role of NT has not been clearly investigated in autosomal dominant polycystic kidney disease (ADPKD). Several clinical studies have focused on new pharmacological approaches to delay cystic disease progression, but there are no data on dietary interventions in ADPKD patients. The aim of this paper is to analyze the evidence from the literature on the impact of five nutritional aspects (water, sodium, phosphorus, protein intake, and net acid load) in CKD-related ADPKD extrapolating-where information is unavailable-from what occurs in CKD non-ADPKD patients Sodium intake restriction could be useful in decreasing the growth rate of cysts...
January 17, 2018: Journal of Nephrology
https://www.readbyqxmd.com/read/29343842/leptin-resistance-was-involved-in-susceptibility-to-overweight-in-the-striped-hamster-re-fed-with-high-fat-diet
#19
Ying Zhao, Li-Bing Chen, Si-Si Mao, Hong-Xia Min, Jing Cao
Food restriction (FR) is the most commonly used intervention to prevent the overweight. However, the lost weight is usually followed by "compensatory growth" when FR ends, resulting in overweight. The present study was aimed to examining the behavior patterns and hormones mechanisms underpinning the over-weight. Energy budget and body fat content, and several endocrine markers related to leptin signals were examined in the striped hamsters under 20% FR refed by either low-fat diet (LF group) or high-fat diet (HF group)...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343712/zika-virus-infection-in-pregnant-rhesus-macaques-causes-placental-dysfunction-and-immunopathology
#20
Alec J Hirsch, Victoria H J Roberts, Peta L Grigsby, Nicole Haese, Matthias C Schabel, Xiaojie Wang, Jamie O Lo, Zheng Liu, Christopher D Kroenke, Jessica L Smith, Meredith Kelleher, Rebecca Broeckel, Craig N Kreklywich, Christopher J Parkins, Michael Denton, Patricia Smith, Victor DeFilippis, William Messer, Jay A Nelson, Jon D Hennebold, Marjorie Grafe, Lois Colgin, Anne Lewis, Rebecca Ducore, Tonya Swanson, Alfred W Legasse, Michael K Axthelm, Rhonda MacAllister, Ashlee V Moses, Terry K Morgan, Antonio E Frias, Daniel N Streblow
Zika virus (ZIKV) infection during pregnancy leads to an increased risk of fetal growth restriction and fetal central nervous system malformations, which are outcomes broadly referred to as the Congenital Zika Syndrome (CZS). Here we infect pregnant rhesus macaques and investigate the impact of persistent ZIKV infection on uteroplacental pathology, blood flow, and fetal growth and development. Despite seemingly normal fetal growth and persistent fetal-placenta-maternal infection, advanced non-invasive in vivo imaging studies reveal dramatic effects on placental oxygen reserve accompanied by significantly decreased oxygen permeability of the placental villi...
January 17, 2018: Nature Communications
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