keyword
MENU ▼
Read by QxMD icon Read
search

Fetal hypoxic

keyword
https://www.readbyqxmd.com/read/29774552/no-sympathy-for-the-hypoxic-the-role-of-fetal-oxygenation-in-autonomic-dysfunction
#1
Jonathan D Hoang, Marmar Vaseghi
Uteroplacental insufficiency, defined as the failure of the placenta to adequately supply nutrients to the developing fetus, can result from insufficient blood flow to the placenta, and thereby deficient fetal oxygenation. This article is protected by copyright. All rights reserved.
May 17, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29753694/physiological-adaptation-of-the-growth-restricted-fetus
#2
REVIEW
Karel Maršál
The growth-restricted fetus in utero is exposed to a hostile environment and suffers undernutrition and hypoxia. To cope with the stress, the fetus changes its physiological functions. These adaptive changes aid intrauterine survival; however, they can lead to permanent functional and structural changes that can contribute to the development of serious chronic diseases later in life. Epigenetic mechanisms are an important part of the pathophysiological processes behind this "developmental origin of adult diseases...
February 24, 2018: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/29752712/maternal-diabetes-alters-the-development-of-ductus-venosus-shunting-in-the-fetus
#3
Agnethe Lund, Cathrine Ebbing, Svein Rasmussen, Torvid W Kiserud, Jörg Kessler
INTRODUCTION: Despite adequate glycemic control, the risks of fetal macrosomia and perinatal complications are increased in diabetic pregnancies. Adjustments of the umbilical venous (UV) distribution, including increased ductus venosus (DV) shunting, can be important fetal compensatory mechanisms, but the impact of pregestational diabetes on UV and DV flow is not known. MATERIAL AND METHODS: In this prospective study, 49 women with pregestational diabetes mellitus underwent monthly ultrasound examinations from gestational week 20 to 36...
May 11, 2018: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/29739273/angiogenic-dysregulation-in-pregnancy-related-hypertension-a-role-for-metformin
#4
Nerolen Soobryan, Saravanakumar Murugesan, Arunagiri Pandiyan, Jagidesa Moodley, Irene Mackraj
In the face of escalating maternal and fetal health threats, hypertensive pregnancy disorders (HPDs) is one of the leading cause of maternal and fetal morbidity and mortality. The range of HPDs include white-coat hypertension, chronic hypertension, gestational hypertension, mild-to-moderate and severe preeclampsia and eclampsia. Current evidence implicates an imbalance of circulating anti- and angiogenic factors in HPDs emanating from the placental vasculature, impacting on angiogenesis. Delivery of the fetus is thus far the only curative measure, albeit with increased risk...
January 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/29710737/cerebral-glucose-deficiency-versus-oxygen-deficiency-in-neonatal-encephalopathy
#5
A M Rudolph
Hypoxic-ischemic encephalopathy (HIE) in newborn infants is generally considered to result from decreased arterial oxygen content or cerebral blood flow. Cerebral injury similar to that of HIE has been noted with hypoglycemia. Studies in fetal lambs have shown that ventilation with 3% oxygen did not change cerebral blood flow, but ventilation with 100% oxygen resulted in marked reduction in cerebral blood flow, glucose delivery and glucose consumption. Blood glucose concentration falls markedly after birth; this, associated with the fall in cerebral blood flow, greatly reduces glucose supply to the brain...
April 24, 2018: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/29695975/characterizing-the-key-metabolic-pathways-of-the-neonatal-mouse-heart-using-a-quantitative-combinatorial-omics-approach
#6
Maciej M Lalowski, Susann Björk, Piet Finckenberg, Rabah Soliymani, Miikka Tarkia, Giulio Calza, Daria Blokhina, Sari Tulokas, Matti Kankainen, Päivi Lakkisto, Marc Baumann, Esko Kankuri, Eero Mervaala
The heart of a newborn mouse has an exceptional capacity to regenerate from myocardial injury that is lost within the first week of its life. In order to elucidate the molecular mechanisms taking place in the mouse heart during this critical period we applied an untargeted combinatory multiomics approach using large-scale mass spectrometry-based quantitative proteomics, metabolomics and mRNA sequencing on hearts from 1-day-old and 7-day-old mice. As a result, we quantified 1.937 proteins (366 differentially expressed), 612 metabolites (263 differentially regulated) and revealed 2...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29674976/neocytolysis-how-to-get-rid-of-the-extra-erythrocytes-formed-by-stress-erythropoiesis-upon-descent-from-high-altitude
#7
REVIEW
Heimo Mairbäurl
Neocytolysis is the selective destruction of those erythrocytes that had been formed during stress-erythropoiesis in hypoxia in order to increase the oxygen transport capacity of blood. Neocytolysis likely aims at decreasing this excess amount of erythrocytes and hemoglobin (Hb) when it is not required anymore and to decrease blood viscosity. Neocytolysis seems to occur upon descent from high altitude. Similar processes seem to occur in microgravity, and are also discussed to mediate the replacement of erythrocytes containing fetal hemoglobin (HbF) with those having adult hemoglobin (HbA) after birth...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29674624/brain-and-spinal-cord-injury-repair-by-implantation-of-human-neural-progenitor-cells-seeded-onto-polymer-scaffolds
#8
Jeong Eun Shin, Kwangsoo Jung, Miri Kim, Kyujin Hwang, Haejin Lee, Il-Sun Kim, Bae Hwan Lee, Il-Shin Lee, Kook In Park
Hypoxic-ischemic (HI) brain injury and spinal cord injury (SCI) lead to extensive tissue loss and axonal degeneration. The combined application of the polymer scaffold and neural progenitor cells (NPCs) has been reported to enhance neural repair, protection and regeneration through multiple modes of action following neural injury. This study investigated the reparative ability and therapeutic potentials of biological bridges composed of human fetal brain-derived NPCs seeded upon poly(glycolic acid)-based scaffold implanted into the infarction cavity of a neonatal HI brain injury or the hemisection cavity in an adult SCI...
April 20, 2018: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/29659625/st-waveform-analysis-for-monitoring-hypoxic-distress-in-fetal-sheep-after-prolonged-umbilical-cord-occlusion
#9
Peter Andriessen, Alex Zwanenburg, Judith O E H van Laar, Rik Vullings, Ben J M Hermans, Hendrik J Niemarkt, Reint K Jellema, Daan R M G Ophelders, Tim G A M Wolfs, Boris W Kramer, Tammo Delhaas
INTRODUCTION: The inconclusive clinical results for ST-waveform analysis (STAN) in detecting fetal hypoxemia may be caused by the signal processing of the STAN-device itself. We assessed the performance of a clinical STAN device in signal processing and in detecting hypoxemia in a fetal sheep model exposed to prolonged umbilical cord occlusion (UCO). METHODS: Eight fetal lambs were exposed to 25 minutes of UCO. ECG recordings were analyzed during a baseline period and during UCO...
2018: PloS One
https://www.readbyqxmd.com/read/29655964/infant-outcome-after-complete-uterine-rupture
#10
Iqbal Al-Zirqi, Anne Kjersti Daltveit, Siri Vangen
BACKGROUND: Complete uterine rupture is a rare peripartum complication often associated with a catastrophic outcome for both mother and child. However, little has been written based on large data sets about maternal and infant outcome after complete ruptures. This is partly due to the rarity of the event and the serious maternal and infant outcome; it is also partly due to the use of international diagnostic codes that do not differentiate between the less catastrophic partial rupture and more catastrophic complete uterine rupture...
April 12, 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29648595/progesterone-as-a-postnatal-prophylactic-agent-for-encephalopathy-caused-by-prenatal-hypoxic-ischemic-insult
#11
Yoshimasa Kawarai, Hirokazu Tanaka, Tatsuya Kobayashi, Makio Shozu
Brain damage caused by hypoxic ischemic insult during the perinatal period causes hypoxic ischemic encephalopathies (HIEs). Therapeutic hypothermia is indicated for HIE, but since the therapeutic burden is large for its limited therapeutic effectiveness, another strategy is needed. Progesterone (P4) plays a neuroprotective role through the actions of its metabolite, allopregnanolone (Allo), on P4 receptor, GABA (γ-aminobutyric acid)A receptors or both. We examined the therapeutic potential of P4 using a newborn rat model of HIE...
April 10, 2018: Endocrinology
https://www.readbyqxmd.com/read/29625873/-lower-uterine-segment-trial-a-pragmatic-open-multicenter-randomized-trial
#12
P Rozenberg, P Deruelle, M-V Sénat, R Desbrière, N Winer, E Simon, Y Ville, G Kayem, I Boutron
BACKGROUND: The data from literature show that trial of labor and elective repeat cesarean delivery after a prior cesarean delivery both present significant risks and benefits, and these risks and benefits differ for the woman and her fetus. The benefits to the woman can be at the expense of her fetus and vice-versa. This uncertainty is compounded by the scarcity of high-level evidence that preclude accurate quantification of the risks and benefits that could help provide a fair counseling about a trial of labor and elective repeat cesarean delivery...
April 4, 2018: Gynecologie, Obstetrique, Fertilite & Senologie
https://www.readbyqxmd.com/read/29625512/%C3%AE-arrestin2-affects-cardiac-progenitor-cell-survival-through-cell-mobility-and-tube-formation-in-severe-hypoxia
#13
Seul Ki Seo, Nari Kim, Ju Hee Lee, Sang Min Kim, Sang Yeub Lee, Jang Whan Bae, Kyung Kuk Hwang, Dong Woon Kim, Walter J Koch, Myeong Chan Cho
BACKGROUND AND OBJECTIVES: β-arrestin2 (β-arr2) basically regulates multiple signaling pathways in mammalian cells by desensitization and internalization of G-protein coupled receptors (GPCRs). We investigated impacts of β-arr2 on survival, mobility, and tube formation of cardiac progenitor cells (CPCs) obtained from wild-type (WT) mouse (CPC-WT), and β-arr2 knock-out (KO) mouse (CPC-KO) cultured in presence or absence of serum and oxygen as non-canonical roles in GPCR system. METHODS: CPCs were cultured in Dulbecco's Modified Eagle Medium/Nutrient Mixture F-12 -based media containing fetal bovine serum and growth factors...
April 2018: Korean Circulation Journal
https://www.readbyqxmd.com/read/29604081/the-peripheral-chemoreflex-indefatigable-guardian-of-fetal-physiological-adaptation-to-labour
#14
Christopher A Lear, Guido Wassink, Jenny A Westgate, Jan G Nijhuis, Austin Ugwumadu, Robert Galinsky, Laura Bennet, Alistair J Gunn
The fetus is consistently exposed to repeated periods of impaired oxygen (hypoxaemia) and nutrient supply in labour. This is balanced by the healthy fetus's remarkable anaerobic tolerance, and impressive ability to mount protective adaptations to hypoxaemia. The most important mediator of fetal adaptations to brief repeated hypoxaemia is the peripheral chemoreflex, a rapid reflex response to acute falls in arterial oxygen tension. The overwhelming majority of fetuses are able to respond to repeated uterine contractions without developing hypotension or hypoxic-ischaemic injury...
March 31, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29604064/altered-autonomic-control-of-heart-rate-variability-in-the-chronically-hypoxic-fetus
#15
C J Shaw, B J Allison, N Itani, K J Botting, Y Niu, C C Lees, D A Giussani
Although fetal heart rate variability (FHRV) has long been recognised as a powerful predictor of fetal wellbeing, the mechanisms by which it is reduced in the chronically hypoxic fetus have yet to be established. In particular, the physiological mechanism underlying the reduction of short term variation (STV) in fetal compromise remains unclear. In this study, we present a longitudinal study of the development of autonomic control of FHRV, assessed by indirect indices, time domain (SDNN, RMSSD) and power spectral analysis (LF, HF, LF/HF), in normoxic and chronically hypoxic, chronically catheterised, singleton fetal sheep over the last third of gestation...
March 31, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29604062/saving-the-brain-one-heartbeat-at-a-time
#16
Martin G Frasch
In their article "Evolving changes in fetal heart rate variability and brain injury after hypoxia-ischemia in preterm fetal sheep," Dr. Yamaguchi et al. set out to demonstrate the time course of changes in several widely-used heart rate variability (HRV) measures during an exposure to a hypoxic-ischemic (HI) insult using fetal sheep as a model. This article is protected by copyright. All rights reserved.
March 31, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29550864/fetal-neuroimaging-an-update-on-technical-advances-and-clinical-findings
#17
REVIEW
Ashley J Robinson, M Ashraf Ederies
This paper is based on a literature review from 2011 to 2016. The paper is divided into two main sections. The first section relates to technical advances in fetal imaging techniques, including fetal motion compensation, imaging at 3.0 T, 3-D T2-weighted MRI, susceptibility-weighted imaging, computed tomography, morphometric analysis, diffusion tensor imaging, spectroscopy and fetal behavioral assessment. The second section relates to clinical updates, including cerebral lamination, migrational anomalies, midline anomalies, neural tube defects, posterior fossa anomalies, sulcation/gyration and hypoxic-ischemic insults...
April 2018: Pediatric Radiology
https://www.readbyqxmd.com/read/29545262/downregulation-of-l-type-voltage-gated-ca-2-voltage-gated-k-and-large-conductance-ca-2-activated-k-channels-in-vascular-myocytes-from-salt-loading-offspring-rats-exposed-to-prenatal-hypoxia
#18
Bailin Liu, Ruixiu Shi, Xiang Li, Yanping Liu, Xueqin Feng, Xueyi Chen, Xiaorong Fan, Yingying Zhang, Wenna Zhang, Jiaqi Tang, Xiuwen Zhou, Na Li, Xiyuan Lu, Zhice Xu
BACKGROUND: Prenatal hypoxia is suggested to be associated with increased risks of hypertension in offspring. This study tested whether prenatal hypoxia resulted in salt-sensitive offspring and its related mechanisms of vascular ion channel remodeling. METHODS AND RESULTS: Pregnant rats were housed in a normoxic (21% O2 ) or hypoxic (10.5% O2 ) chamber from gestation days 5 to 21. A subset of male offspring received a high-salt diet (8% NaCl) from 4 to 12 weeks after birth...
March 15, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29527911/alcohol-and-fetoplacental-vasoconstrictor-reactivity
#19
V Jakoubek, V Hampl
Alcohol abuse during pregnancy is a well-known factor in fetal morbidity, including smaller fetal size. We have shown that chronic hypoxia, considered the main pathogenetic factor in intrauterine growth restriction, elevates fetoplacental vascular resistance (and vasoconstrictor reactivity) and thus, presumably, reduces placental blood flow. We thus hypothesized that alcohol may affect the fetus - in addition to other mechanisms - by altering fetoplacental vascular resistance and/or reactivity. Using isolated, double-perfused rat placenta model, we found that maternal alcohol intake in the last third of gestation doubled the vasoconstrictor responses to angiotensin II but did not affect resting vascular resistance...
March 12, 2018: Physiological Research
https://www.readbyqxmd.com/read/29524565/impact-of-prenatal-hypoxia-on-fetal-bone-growth-and-osteoporosis-in-ovariectomized-offspring-rats
#20
Yuxian Yang, Xiaorong Fan, Jianying Tao, Ting Xu, Yingying Zhang, Wenna Zhang, Lingjun Li, Xiang Li, Hongmei Ding, Miao Sun, Qinqin Gao, Zhice Xu
Prenatal hypoxia causes intrauterine growth retardation. It is unclear whether/how hypoxia affects the bone in fetal and offspring life. This study showed that prenatal hypoxia retarded fetal skeletal growth in rats, inhibited extracellular matrix (ECM) synthesis and down-regulated of insulin-like growth factor 1 (IGF1) signaling in fetal growth plate chondrocytes in vivo and in vitro. In addition, ovariectomized (OVX) was used for study of postmenopausal osteoporosis. Compared with the control, OVX offspring in prenatal hypoxic group showed an enhanced osteoporosis in the femurs, associated with reduced proteoglycan and IGF1 signaling...
March 7, 2018: Reproductive Toxicology
keyword
keyword
83400
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"