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https://www.readbyqxmd.com/read/28330995/hepatic-fcrn-regulates-albumin-homeostasis-and-susceptibility-to-liver-injury
#1
Michal Pyzik, Timo Rath, Timothy T Kuo, Sanda Win, Kristi Baker, Jonathan J Hubbard, Rosa Grenha, Amit Gandhi, Thomas D Krämer, Adam R Mezo, Zachary S Taylor, Kevin McDonnell, Vicki Nienaber, Jan Terje Andersen, Atsushi Mizoguchi, Laurence Blumberg, Shalaka Purohit, Susan D Jones, Greg Christianson, Wayne I Lencer, Inger Sandlie, Neil Kaplowitz, Derry C Roopenian, Richard S Blumberg
The neonatal crystallizable fragment receptor (FcRn) is responsible for maintaining the long half-life and high levels of the two most abundant circulating proteins, albumin and IgG. In the latter case, the protective mechanism derives from FcRn binding to IgG in the weakly acidic environment contained within endosomes of hematopoietic and parenchymal cells, whereupon IgG is diverted from degradation in lysosomes and is recycled. The cellular location and mechanism by which FcRn protects albumin are partially understood...
March 22, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28330415/novel-detection-of-placental-insufficiency-by-magnetic-resonance-imaging-in-the-nonhuman-primate
#2
Jamie O Lo, Victoria H J Roberts, Matthias C Schabel, Xiaojie Wang, Terry K Morgan, Zheng Liu, Colin Studholme, Christopher D Kroenke, Antonio E Frias
The placenta is a vital organ necessary for healthy fetal development. Placental insufficiency creates an in utero environment where the fetus is at risk of insufficient oxygen or nutrient exchange. This is primarily caused by impairment of either maternal or fetal circulation or vascular thrombosis such as placental infarction. As a result of placental dysfunction, affected fetuses may be growth restricted, neurologically impaired, and at risk of increased morbidity and mortality. In a cohort of 4 pregnant Rhesus macaques, we describe antenatal detection of naturally occurring intrauterine growth restriction (IUGR) and aberrant fetal neurodevelopment in 1 animal...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28318007/myocardial-infarction-in-a-neonate-lessons-for-neonatal-and-internal-medicine
#3
Werner Streif
Due to the lack of evidence-based guidelines, management strategies for neonatal MI should be individualized and administered largely at the discretion of responsible treating teams. Supportive care with a focus on preserving adequate circulation and antithrombotic therapy with a view to restoring vascular patency are the mainstays of treatment. Thrombolytic therapy of neonatal MI includes a chance to completely restore myocardial function. Understanding the resilience of the neonatal heart and mechanism of cardiac cell repair in neonates may spark novel treatment strategies for severe MI in the large number of affected individuals in an aging population...
March 20, 2017: Hämostaseologie
https://www.readbyqxmd.com/read/28315352/bilirubin-and-brain-a-pharmacological-approach
#4
REVIEW
Cesare Mancuso
For many decades, the world scientific literature has accounted for a number of works on the biological effects of bilirubin-IXalpha (BR). The first studies focused on the neurotoxic effects of the excessive production of BR, in particular regarding both physiological neonatal jaundice and the more severe ones, typically as consequences of severe hemolysis or other underlying diseases. Only since 1987, has significant evidence, however, underlined the neuroprotective role of BR linked to the scavenging effect of free radicals as reactive oxygen species and nitric oxide and its congeners...
March 14, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28298945/doppler-ultrasound-assessment-of-the-splanchnic-circulation-in-preterms-with-neonatal-sepsis-at-risk-for-necrotizing-enterocolitis
#5
Rania H Hashem, Yasmeen A Mansi, Nehal S Almasah, Shereen Abdelghaffar
OBJECTIVE: To evaluate the role of Doppler ultrasonography in the assessment of splanchnic circulation's hemodynamic changes in septic preterms at risk of necrotizing enterocolitis. METHODS: A total of 51 septic preterms were divided into two groups: 25 preterms with clinical signs of necrotizing enterocolitis (NEC) and 26 preterms with no clinical signs of NEC. Both groups were assessed with Doppler ultrasonography of the celiac and superior mesenteric arteries, and each septic preterm's peak systolic velocity (PSV), end-diastolic velocity (EDV), resistivity index (RI), and pulsatility index (PI) was calculated and recorded...
March 2017: Journal of Ultrasound
https://www.readbyqxmd.com/read/28289707/eomesodermin-and-t-bet-mark-developmentally-distinct-human-natural-killer-cells
#6
Amélie Collins, Nyanza Rothman, Kang Liu, Steven L Reiner
Immaturity of the immune system of human fetuses and neonates is often invoked to explain their increased susceptibility to infection; however, the development of the fetal innate immune system in early life remains incompletely explored. We now show that the most mature NK cells found in adult (or postnatal) human circulation (CD94(-)CD16(+)) are absent during ontogeny. Human fetal NK cells were found to express the 2 signature T-box transcription factors essential for the development of all murine NK and NK-like cells, eomesodermin (Eomes) and T-bet...
March 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28285896/perinatal-changes-in-fetal-ventricular-geometry-myocardial-performance-and-cardiac-function-in-normal-term-pregnancies
#7
Olga Patey, Michael A Gatzoulis, Basky Thilaganathan, Julene S Carvalho
BACKGROUND: The fetal heart at term is exposed to an increase in hemodynamic work as a consequence of fetal growth, increased circulating volume, and alteration in loading patterns due to maturational changes in fetoplacental circulation. The extent to which these cardiovascular changes influence human fetal and neonatal cardiac adaptation has not been fully elucidated. The aim of this study was to evaluate perinatal cardiovascular changes in ventricular geometry and myocardial performance in normal term fetuses...
March 9, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28282447/neonatal-overfeeding-disrupts-pituitary-ghrelin-signalling-in-female-rats-long-term-implications-for-the-stress-response
#8
Luba Sominsky, Ilvana Ziko, Sarah J Spencer
The hypothalamic-pituitary-adrenal (HPA) axis responses to psychological stress are exacerbated in adult female but not male rats made obese due to overfeeding in early life. Ghrelin, traditionally known for its role in energy homeostasis, has been recently recognised for its role in coordinating the HPA responses to stress, particularly by acting directly at the anterior pituitary where the growth hormone secretagogue receptor (GHSR), the receptor for acyl ghrelin, is abundantly expressed. We therefore hypothesised that neonatal overfeeding in female rats would compromise pituitary responsiveness to ghrelin, contributing to a hyperactive central stress responsiveness...
2017: PloS One
https://www.readbyqxmd.com/read/28281412/early-hybrid-approach-and-enteral-feeding-algorithm-could-reduce-the-incidence-of-necrotising-enterocolitis-in-neonates-with-ductus-dependent-systemic-circulation
#9
Lucia Manuri, Stefano Morelli, Salvatore Agati, Michele B Saitta, Lilia Oreto, Giuseppe Mandraffino, Enrico Iannace, Fiore S Iorio, Paolo Guccione
BACKGROUND: The reported incidence of necrotising enterocolitis in neonates with complex CHD with ductus-dependent systemic circulation ranges from 6.8 to 13% despite surgical treatment; the overall mortality is between 25 and 97%. The incidence of gastrointestinal complications after hybrid palliation for neonates with ductus-dependent systemic circulation still has to be defined, but seems comparable with that following the Norwood procedure. METHODS: We reviewed the incidence of gastrointestinal complications in a series of 42 consecutive neonates with ductus-dependent systemic circulation, who received early hybrid palliation associated with a standardised feeding protocol...
January 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28272149/plasticity-of-auricular-cartilage-in-response-to-hormone-therapy
#10
Patrick S Cottler, Matthew D McLeod, Jesse L Payton, Angela Pineros-Fernandez, Jonathan S Black
INTRODUCTION: Correction of auricular deformities can be accomplished through splinting within the first few weeks of life. This is hypothesized to be due to retained circulating maternal estrogens decreasing the structural density of collagen; however, this has not been fully tested. Cartilage elasticity is dependent on the concentration of the proteoglycan aggregate, and hyaluronic acid, a constituent of proteoglycan aggregate, is increased by estrogens. Nonsurgical correction of these deformities in more developed patients has the potential to change clinical practice and eliminate surgical risks...
March 7, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28267443/balloon-removal-after-fetoscopic-endoluminal-tracheal-occlusion-for-congenital-diaphragmatic-hernia
#11
Julio A Jiménez, Elisenda Eixarch, Philip Dekoninck, João R Bennini, Roland Devlieger, Cleisson F Peralta, Eduard Gratacos, Jan Deprest
BACKGROUND: Isolated congenital diaphragmatic hernia (CDH) defect allows viscera to herniate into the chest, competing for space with the developing lungs. At birth, pulmonary hypoplasia leads to respiratory insufficiency and persistent pulmonary hypertension that is lethal in up to 30% of patients. Antenatal measurement of lung size and liver herniation can predict survival after birth. Prenatal intervention aims at stimulating lung development, clinically achieved by percutaneous fetal endoscopic tracheal occlusion (FETO) under local anesthesia...
March 3, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28264506/plasma-membrane-na%C3%A2-%C2%BA-coupled-citrate-transporter-slc13a5-and-neonatal-epileptic-encephalopathy
#12
REVIEW
Yangzom D Bhutia, Jonathan J Kopel, John J Lawrence, Volker Neugebauer, Vadivel Ganapathy
SLC13A5 is a Na⁺-coupled transporter for citrate that is expressed in the plasma membrane of specific cell types in the liver, testis, and brain. It is an electrogenic transporter with a Na⁺:citrate(3-) stoichiometry of 4:1. In humans, the Michaelis constant for SLC13A5 to transport citrate is ~600 μM, which is physiologically relevant given that the normal concentration of citrate in plasma is in the range of 150-200 μM. Li⁺ stimulates the transport function of human SLC13A5 at concentrations that are in the therapeutic range in patients on lithium therapy...
February 28, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28253519/reliability-of-pulse-oximetry-during-progressive-hypoxia-cardiopulmonary-resuscitation-and-recovery-in-a-piglet-model-of-neonatal-hypoxic-cardiac-arrest
#13
Mohammad Ahmad Hassan, Claudia Weber, Markus Waitz, Li Huang, Helmut D Hummler, Marc Robin Mendler
BACKGROUND: Pulse oximetry is widely used in intensive care and emergency conditions to monitor arterial oxygenation and to guide oxygen therapy. OBJECTIVE: To study the reliability of pulse oximetry in comparison with CO-oximetry in newborn piglets during progressive hypoxia, cardiac arrest, cardiopulmonary resuscitation (CPR), and after return of spontaneous circulation (ROSC). METHODS: Thirty-three newborn piglets were exposed to hypoxia until asystole occurred and then resuscitated until ROSC...
March 3, 2017: Neonatology
https://www.readbyqxmd.com/read/28246614/mannose-binding-lectin-biologic-characteristics-and-role-in-the-susceptibility-to-infections-and-ischemia-reperfusion-related-injury-in-critically-ill-neonates
#14
REVIEW
Cinzia Auriti, Giusi Prencipe, Maria Moriondo, Iliana Bersani, Chiara Bertaina, Vito Mondì, Rita Inglese
The mannose-binding lectin (MBL) is a member of the collectin family, belonging to the innate immunity system. Genetic, biologic, and clinical properties of MBL have been widely investigated throughout the last decades, although some interesting aspects of its potential clinical relevance are still poorly understood. Low circulating concentrations of MBL have been associated with increased risk of infection and poor neurologic outcome in neonates. On the other hand, an excessive and uncontrolled inflammatory response by the neonatal intestine after the exposure to luminal bacteria, leading to an increased production of MBL, may be involved in the onset of necrotizing enterocolitis...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28243937/zika-virus-an-emerging-flavivirus
#15
REVIEW
Sang-Im Yun, Young-Min Lee
Zika virus (ZIKV) is a previously little-known flavivirus closely related to Japanese encephalitis, West Nile, dengue, and yellow fever viruses, all of which are primarily transmitted by blood-sucking mosquitoes. Since its discovery in Uganda in 1947, ZIKV has continued to expand its geographic range, from equatorial Africa and Asia to the Pacific Islands, then further afield to South and Central America and the Caribbean. Currently, ZIKV is actively circulating not only in much of Latin America and its neighbors but also in parts of the Pacific Islands and Southeast Asia...
March 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28217680/first-reported-case-of-fetal-aortic-valvuloplasty-in-asia
#16
Sun-Young Yoon, Hye-Sung Won, Mi-Young Lee, Min Kyong Cho, Euiseok Jung, Ki-Soo Kim, Young-Hwue Kim
Prenatal intervention of severe fetal aortic valve stenosis by ultrasound-guided percutaneous balloon valvuloplasty has been performed to prevent the progression to hypoplastic left heart syndrome, and achieve biventricular circulation in neonates. Here we report a case of fetal aortic valvuloplasty prenatally diagnosed with aortic stenosis at 24 weeks of gestation and showed worsening features on a follow-up echocardiography. Prenatal aortic valvuloplasty was performed at 29 weeks of gestation, and was a technical success...
January 2017: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/28214793/evaluation-of-timing-and-route-of-epinephrine-in-a-neonatal-model-of-asphyxial-arrest
#17
Payam Vali, Praveen Chandrasekharan, Munmun Rawat, Sylvia Gugino, Carmon Koenigsknecht, Justin Helman, William J Jusko, Bobby Mathew, Sara Berkelhamer, Jayasree Nair, Myra H Wyckoff, Satyan Lakshminrusimha
BACKGROUND: Epinephrine administered by low umbilical venous catheter (UVC) or endotracheal tube (ETT) is indicated in neonates who fail to respond to positive pressure ventilation and chest compressions at birth. Pharmacokinetics of ETT epinephrine via fluid-filled lungs or UVC epinephrine in the presence of fetal shunts is unknown. We hypothesized that epinephrine administered by ETT or low UVC results in plasma epinephrine concentrations and rates of return of spontaneous circulation (ROSC) similar to right atrial (RA) epinephrine...
February 18, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28212839/incidence-and-prognosis-of-nosocomial-infection-after-recovering-of-cardiac-arrest-in-children
#18
Andrés Fernández, Ana Solís, Paloma Cañete, Jimena Del Castillo, Javier Urbano, Angel Carrillo, Jesús López-Herce
OBJECTIVE: to analyze the incidence of infection in children who have suffered an in-hospital cardiac arrest (CA) and the association with mortality. METHODS: A retrospective unicenter observational study on a prospective database with children between one month and 16 years old, who have suffered an in-hospital CA was performed. Clinical, analytical and monitorization data, treatment, mortality and cause of death were recorded. RESULTS: 57 children were studied (57...
April 2017: Resuscitation
https://www.readbyqxmd.com/read/28208844/spectrum-of-factors-triggering-endothelial-dysfunction-in-pih
#19
Visala Sree Jammalamadaga, Philips Abraham
INTRODUCTION: Pre-eclampsia (PE) is a major cause of maternal and fetal/neonatal mortality and morbidity. The aetiology and pathogenesis of PE is yet to be completely understood. Evidence shows that, Endothelial Dysfunction (ED) plays a pivotal role in the genesis of this multi-system disorder that develops in PE and eclampsia. AIM: To determine the circulating levels of factors Malondialdehyde (MDA), Ferric Reducing Ability of Plasma-α (FRAP), Tumour Necrosis Factor (TNF-α), sFlt-1, VEGF, PlGF, Nitric Oxide (NO) that influence the ED...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28194805/fetal-adaptations-in-insulin-secretion-result-from-high-catecholamines-during-placental-insufficiency
#20
Sean W Limesand, Paul J Rozance
Placental insufficiency and intrauterine growth restriction (IUGR) of the fetus affects approximately 8% of all pregnancies and is associated with short- and long-term disturbances in metabolism. In pregnant sheep, experimental models with a small, defective placenta that restricts delivery of nutrients and oxygen to the fetus result in IUGR. Low blood oxygen concentrations increase fetal plasma catecholamine concentrations, which lower fetal insulin concentrations. All of these observations in sheep models with placental insufficiency are consistent with cases of human IUGR...
February 14, 2017: Journal of Physiology
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