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https://www.readbyqxmd.com/read/28109053/frogs-model-man-in-vivo-thyroid-hormone-signaling-during-development
#1
REVIEW
Laurent M Sachs, Daniel R Buchholz
Thyroid hormone (TH) signaling comprises TH transport across cell membranes, metabolism by deiodinases, and molecular mechanisms of gene regulation. Proper TH signaling is essential for normal perinatal development, most notably for neurogenesis and fetal growth. Knowledge of perinatal TH endocrinology needs improvement to provide better treatments for premature infants and endocrine diseases during gestation and to counteract effects of endocrine disrupting chemicals. Studies in amphibians have provided major insights to understand in-vivo mechanisms of TH signaling...
January 21, 2017: Genesis: the Journal of Genetics and Development
https://www.readbyqxmd.com/read/28108103/respiratory-support-for-very-low-birth-weight-infants-receiving-dexamethasone
#2
Yamini V Virkud, Christoph P Hornik, Daniel K Benjamin, Matthew M Laughon, Reese H Clark, Rachel G Greenberg, P Brian Smith
OBJECTIVE: To assess how neonatal intensive care units followed the American Academy of Pediatrics guidelines for use of dexamethasone in preterm infants by evaluating respiratory support at the time of dexamethasone administration. STUDY DESIGN: This is an observational study of infants discharged from one of 290 neonatal intensive care units from 2003 to 2010. The cohort included very low birth weight (<1500 g birth weight) infants born at ≤32 weeks gestational age...
January 18, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28106777/neuroprotection-by-caffeine-in-hyperoxia-induced-neonatal-brain-injury
#3
Stefanie Endesfelder, Ulrike Weichelt, Evelyn Strauß, Anja Schlör, Marco Sifringer, Till Scheuer, Christoph Bührer, Thomas Schmitz
Sequelae of prematurity triggered by oxidative stress and free radical-mediated tissue damage have coined the term "oxygen radical disease of prematurity". Caffeine, a potent free radical scavenger and adenosine receptor antagonist, reduces rates of brain damage in preterm infants. In the present study, we investigated the effects of caffeine on oxidative stress markers, anti-oxidative response, inflammation, redox-sensitive transcription factors, apoptosis, and extracellular matrix following the induction of hyperoxia in neonatal rats...
January 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28106024/-a-rare-cause-of-2-1-atrioventricular-block-and-congestive-heart-failure-in-preterm-infants-hypocalcemia
#4
Emine Azak, Hatice Tatar Aksoy, Handan Ünsal, İbrahim İlker Çetin
Atrioventricular (AV) block in the neonatal period is a rare disorder. It is frequently associated with underlying structural congenital heart disease and maternal lupus. Presently described is premature baby who developed 2:1 AV block and congestive heart failure due to hypocalcemia. Dramatic clinical improvement was observed following treatment of intravenous 10% calcium gluconate. Therefore, it is suggested that serum calcium level of newborns with AV block and congestive heart failure be measured.
January 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28105373/vascular-changes-on-fluorescein-angiography-of-premature-infants-with-low-risk-of-retinopathy-of-prematurity-after-high-oxygen-exposure
#5
Maria Ana Martinez-Castellanos, Raul Velez-Montoya, Kenneth Price, Andree Henaine-Berra, Gerardo García-Aguirre, Virgilio Morales-Canton, Linda Alejandra Cernichiaro-Espinosa
PURPOSE: To describe a wide array of peripheral vascular changes using fluorescein angiography in preterm neonates, without high risk characteristics for developing retinopathy of prematurity, that were exposed to high oxygen concentration. METHODS: Retrospective, two center, case series. Newborns at two different hospitals with ≥1500 g or gestational age of ≥32 weeks, fluorescein angiography performed, and with high oxygen exposure without adequate control were included...
2017: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/28105101/urinary-neutrophil-gelatinase-associated-lipocalin-is-an-early-predictor-of-acute-kidney-injury-in-premature-infants
#6
Ryota Kuribayashi, Hiroshi Suzumura, Toshimi Sairenchi, Yoshiyuki Watabe, Yayoi Tsuboi, George Imataka, Hidemitsu Kurosawa, Osamu Arisaka
Urinary neutrophil gelatinase-associated lipocalin (uNGAL) is produced in response to tubular epithelial injury and is a biomarker of tubulointerstitial injury. The aim of the present study was to examine whether acute kidney injury (AKI) could be predicted by measuring uNGAL in very low-birth weight (VLBW) infants. Forty VLBW infants with birthweight below 1,500 g were enrolled in the present study. uNGAL and serum creatinine (sCre) were measured daily from postnatal days 0 to 8. Infants with sCre ≥1.2 mg/dl were diagnosed with AKI...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28104944/restricted-diffusion-in-the-corpus-callosum-a-neuroradiological-marker-in-hypoxic-ischemic-encephalopathy
#7
Alok Kale, Priscilla Joshi, A B Kelkar
BACKGROUND: Restricted diffusion within the splenium of the corpus callosum has been described by other authors in various conditions, however, restricted diffusion in the entire corpus callosum or isolated involvement of the splenium, genu, or body has been infrequently reported on magnetic resonance imaging (MRI) in neonatal hypoxic-ischemic encephalopathy. We report a series of cases showing different patterns of involvement. METHODS AND MATERIALS: Perinatal imaging with MRI including diffusion-weighted imaging was performed in 40 neonates with hypoxic-ischemic encephalopathy, including 11 premature neonates...
October 2016: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/28104401/leading-causes-of-preterm-delivery-as-risk-factors-for-intraventricular-hemorrhage-in-very-preterm-infants-results-of-the-epipage-2-cohort-study
#8
Marie Chevallier, Thierry Debillon, Veronique Pierrat, Pierre Delorme, Gilles Kayem, Mélanie Durox, François Goffinet, Stephane Marret, Pierre Yves Ancel
BACKGROUND: Intraventricular hemorrhage is a major risk factor for neurodevelopmental disabilities in preterm infants. However, few studies have investigated how pregnancy complications responsible for preterm delivery are related to intraventricular hemorrhage. OBJECTIVE: To investigate the association between the main causes of preterm delivery and intraventricular hemorrhage in very preterm infants born in France during 2011 between 22 and 31 weeks of gestation...
January 16, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28103583/angiogenesis-related-genes-may-be-a-more-important-factor-than-matrix-metalloproteinases-in-bronchopulmonary-dysplasia-development
#9
Min Yang, Bo-Lin Chen, Jian-Bao Huang, Yan-Ni Meng, Xiao-Jun Duan, Lu Chen, Lin-Rui Li, Yan-Ping Chen
We characterized the expression profile of angiogenesis-related genes (ARG) and matrix metalloproteinase (MMP) genes in preterm infants, with and without bronchopulmonary dysplasia (BPD). We reanalyzed a gene expression dataset for preterm infants from the Gene Expression Omnibus database using the Gene-Cloud of Biotechnology Information platform. A total of 1,652 genes were differentially (1.2-fold change) expressed: 811 were highly expressed in infants with BPD, and 841 were highly expressed in those without BPD...
January 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28101838/renal-consequences-of-preterm-birth
#10
REVIEW
Amelie Stritzke, Sumesh Thomas, Harish Amin, Christoph Fusch, Abhay Lodha
BACKGROUND: The developmental origin of health and disease concept identifies the brain, cardiovascular, liver, and kidney systems as targets of fetal adverse programming with adult consequences. As the limits of viability in premature infants have been pushed to lower gestational ages, the long-term impact of prematurity on kidneys still remains a significant burden during hospital stay and beyond. OBJECTIVES: The purpose of this study is to summarize available evidence, mechanisms, and short- and long-term renal consequences of prematurity and identify nephroprotective strategies and areas of uncertainty...
December 2017: Molecular and Cellular Pediatrics
https://www.readbyqxmd.com/read/28100981/isolated-left-subclavian-artery-complete-atrioventricular-block-and-tricuspid-atresia-in-a-neonate
#11
Kanupriya Chaturvedi, Deepa Prasad, Ravi Ashwath, James P Strainic, Christopher S Snyder
Isolated left subclavian artery is one of the rarer aortic arch anomalies. It has been associated with other congenital heart diseases, typically tetralogy of Fallot, double-outlet right ventricle, and atrial and ventricular septal defects. Its significant clinical implications include a left-to-right shunt from the vertebrobasilar system, which causes pulmonary overcirculation and subclavian steal. We present an unusual case of a premature infant who was diagnosed prenatally with congenital complete atrioventricular block and tricuspid atresia and was found to have an isolated left subclavian artery postnatally...
December 2016: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28100335/-methods-for-establishing-animal-model-of-bronchopulmonary-dysplasia-and-their-evaluation
#12
Zeng Xiong, Xia Zhou, Shao-Jie Yue
With the development of treatment, the survival rate of premature infants has significantly increased, especially extremely premature infants and very low birth weight infants. This has led to an increase in incidence of bronchopulmonary dysplasia (BPD) year by year. BPD has been one of the most common respiratory system diseases in premature infants, especially the small premature infants. Arrested alveolar development is an important cause of BPD. Therefore, the mechanism of arrested alveolar development and the intervention measures for promoting alveolar development are the focuses of research on BPD...
January 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28098735/optical-coherence-tomography-angiography-of-the-fovea-in-children-born-preterm
#13
Khalil Ghasemi Falavarjani, Nicholas A Iafe, Federico G Velez, Steven D Schwartz, Srinivas R Sadda, David Sarraf, Irena Tsui
PURPOSE: To compare the foveal avascular zone (FAZ) area measured by optical coherence tomography angiography in children who had been born preterm with age-matched controls. METHODS: In this cross-sectional observational comparative case series, 43 eyes of 26 children (28 eyes of 15 former preterm infants and 15 eyes of 11 former term infants) between the ages of 4 and 12 years old were included. Optical coherence tomography angiography with a scan size of 3 × 3 was performed for all eyes...
January 16, 2017: Retina
https://www.readbyqxmd.com/read/28097843/colonization-and-infection-in-the-newborn-infant-does-chlorhexidine-play-a-role-in-infection-prevention
#14
Lizeth Ortegón, Marcela Puentes-Herrera, Ivohne F Corrales, Jorge A Cortés
Healthcare-associated infections are a major problem in newborn infants, considering their high morbidity, mortality, and long-term sequelae. In preterm infants, it has been shown that skin and gastrointestinal tract colonization undergoes variations compared to healthy term infants, and that preterm infants are more exposed to nosocomial microorganisms given their higher probability of being admitted to the neonatal intensive care unit where they are cared for. This document reviews normal colonization, the changes observed during hospitalization, prematurity, and the potential role of chlorhexidine in the prevention of resistant microorganism transmission, as well as its side effects in newborn infants admitted to the neonatal intensive care unit...
1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28092913/umbilical-venous-catheter-malposition-is-associated-with-necrotizing-enterocolitis-in-premature-infants
#15
Mustafa Sulemanji, Khashayar Vakili, David Zurakowski, Wayne Tworetzky, Steven J Fishman, Heung Bae Kim
OBJECTIVE: The etiology of necrotizing enterocolitis (NEC) remains elusive despite known associations with several factors, including intestinal ischemia related to the effects of umbilical arterial catheterization on the mesenteric circulation. However, the role of the mesenteric venous circulation has yet to be studied as a potential cause of NEC. We examined the association between umbilical venous catheter (UVC) position and the development of NEC in premature infants. DESIGN: A prospective cohort study was performed to examine the effect of UVC on portosystemic shunting via the ductus venosus (DV) and its potential role in NEC...
January 17, 2017: Neonatology
https://www.readbyqxmd.com/read/28091544/ultrasound-prediction-of-abnormal-infant-development-in-hypertensive-pregnant-women-in-the-second-and-third-trimester
#16
Guofang Shen, Yajuan Huang, Lixin Jiang, Jinghong Gu, Yaxin Wang, Bing Hu
The objective was to assess the sensitivities and accuracies of Doppler ultrasound parameters in the second and third trimester of hypertensive pregnancies in determining perinatal outcomes. 1,054 pregnancies were retrospectively categorized into three groups (healthy pregnancies (HP, n = 988), pregnancies of hypertensive women (HypP, n = 30) and high-risk hypertension pregnancies (HRHypP, n = 36), depending on gestational hypertension as well as fetal birth weights and pregnancy outcomes. Systolic/diastolic ratio (S/D), resistance index (RI), pulsatility index (PI) of the bilateral uterine artery, umbilical artery and vein as well as venous flow velocity data were monitored by Doppler ultrasound...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28090255/clinical-utility-of-echocardiography-for-the-diagnosis-and-prognosis-in-children-with-bronchopulmonary-dsyplasia
#17
Young Earl Choi, Hwa Jin Cho, Eun Song Song, In Seok Jeong, Namsik Yoon, Young Youn Choi, Jae Sook Ma, Young Kuk Cho
BACKGROUND: Bronchopulmonary dysplasia (BPD) may result in chronic pulmonary artery hypertension and right ventricular (RV) dysfunction. Various echocardiographic assessments of RV dysfunction have been used to determine whether echocardiographic measurements of premature infants with BPD could provide sensitive measures of RV function that correlates with BPD severity. METHODS: Twenty-eight control subjects without BPD (non BPD group), 28 patients with mild BPD, 11 patients with moderate BPD, and six patients with severe BPD underwent echocardiograms with standard measurement such as ejection fraction by M-mode, tricuspid regurgitation pressure gradient, myocardial performance index (MPI) derived from pulse Doppler, and tissue Doppler imaging (TDI) measurements...
December 2016: Journal of Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/28090228/evaluation-of-radiation-dose-received-by-premature-neonates-admitted-to-neonatal-intensive-care-unit
#18
Mohmmadreza Aramesh, Kobra Aria Zanganeh, Masoud Dehdashtian, Arash Malekian, Jafar Fatahiasl
BACKGROUND: This study aimed to evaluate the radiation dose received by premature neonates using diagnostic radiographies. METHODS: This cross-sectional study was conducted on 116 premature neonates with gestational age from 25 to 37 weeks; with the diagnosis of neonatal respiratory distress syndrome (NRDS) and tachypnea, they were admitted to a neonatal intensive care unit (NICU) at Ahvaz Imam Khomeini Hospital in 2015. For assessing the dose received, the model GR-200 thermoluminescent dosimeter (TLD) was used...
February 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28088587/late-onset-neonatal-sepsis-in-arab-states-in-the-gulf-region-two-year-prospective-study
#19
Majeda S Hammoud, Abdullah Al-Taiar, Sameer Y Al-Abdi, Hussain Bozaid, Anwar Khan, Laila M AlMuhairi, Moghis Ur Rehman
OBJECTIVES: This study aimed to investigate the incidence of Late-Onset Sepsis (LOS) in neonatal intensive care units (NICUs) in Arab states in the gulf region and describe the main causative organisms and their antibiotic resistance. METHODS: Observational prospective cohort study was conducted over two-year period in five NICUs in Kuwait, Saudi Arabia and United Arab Emirates. LOS was defined as the growth of a single potentially pathogenic organism from blood or cerebrospinal fluid in infants >3days of age with clinical and laboratory findings consistent with infection...
January 11, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28088487/adenosine-receptors-and-caffeine-in-retinopathy-of-prematurity
#20
REVIEW
Jiang-Fan Chen, Shuya Zhang, Rong Zhou, Zhenlang Lin, Xiaohong Cai, Jing Lin, Yuqin Huo, Xiaoling Liu
Retinopathy of prematurity (ROP) is a major cause of childhood blindness in the world and is caused by oxygen-induced damage to the developing retinal vasculature, resulting in hyperoxia-induced vaso-obliteration and subsequent delayed retinal vascularization and hypoxia-induced pathological neovascularization driven by vascular endothelial growth factor (VEGF) signaling pathway in retina. Current anti-VEGF therapy has shown some effective in a clinical trial, but is associated with the unintended effects on delayed eye growth and retinal vasculature development of preterm infants...
January 11, 2017: Molecular Aspects of Medicine
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