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Neonatal injury

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https://www.readbyqxmd.com/read/29218325/protection-of-meconium-induced-lung-epithelial-injury-by-protease-inhibitors
#1
C Ota, I Gopallawa, V Ivanov, I H Gewolb, B D Uhal
Earlier work form this laboratory showed that exposure of alveolar epithelial cells (AECs) to meconium caused significant cell detachment and that meconium-induced detachment of cells was prevented by a protease inhibitor cocktail. Therefore, it was hypothesized that protease inhibitors might protect AEC monolayers against meconium-induced collapse of epithelial barrier function both in vitro and in vivo. To investigate this theory in vitro, albumin flux was measured across cultured, confluent monolayers of human type II derived cell line A549 on microporous filter inserts...
2017: Journal of Lung, Pulmonary & Respiratory Research
https://www.readbyqxmd.com/read/29214686/myricetin-attenuated-lps-induced-cardiac-injury-in-vivo-and-in-vitro
#2
Nan Zhang, Hong Feng, Hai-Han Liao, Si Chen, Zheng Yang, Wei Deng, Qi-Zhu Tang
Sepsis induced myocardial dysfunction (SIMD) is a common complication and leads to an increased mortality. SIMD is closely related to inflammation and oxidative stress. Myricetin exhibits strong capacities of anti-inflammation and anti-oxidative stress, but its pharmacological effects for lipopolysaccharide (LPS) induced cardiac injury remains undefined. This study aimed to explore whether myricetin was efficient to alleviate SIMD in mice and neonatal rat cardiomyocytes injury. Mice administrated with myricetin (100 mg/kg, po, bid) or vehicle groups were challenged with LPS (10 mg/kg, ip), and cardiac functions examined by echocardiography after 12 hr LPS exposure...
December 7, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29213350/immediate-early-response-gene-x-1-iex-1-mediates-ischemic-preconditioning-induced-cardioprotection-in-rats
#3
Ming-Jiang Xu, Yan Cai, Aijuan Qu, John Y-J Shyy, Wenjing Li, Xian Wang
Reversible myocardial ischemia/reperfusion (I/R) or ischemic preconditioning (IPC) is associated with an immediate genomic response; IPC-induced immediate early genes are associated with reduced infarct size. Because the immediate early response gene X-1 (IEX-1) plays a central role in cell apoptosis, we examine whether IEX-1 exerts protective effects against I/R injury. We found that the IEX-1 mRNA level was increased in the IPC-imposed rat heart. However, it was downregulated in the I/R rat heart, which was prevented by in situ IPC...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29211056/krebs-cycle-metabolites-and-preferential-succinate-oxidation-following-neonatal-hypoxic-ischemic-brain-injury-in-mice
#4
Prateek V Sahni, Jimmy Zhang, Sergey Sosunov, Alexander Galkin, Zoya Niatsetskaya, Anatoly Starkov, Paul S Brookes, Vadim S Ten
BackgroundReverse electron transport (RET) driven by the oxidation of succinate has been proposed as the mechanism of accelerated production of reactive oxygen species (ROS) in post-ischemic mitochondria. However, it remains unclear whether upon reperfusion, mitochondria preferentially oxidase succinate.MethodsNeonatal mice were subjected to Rice-Vannucci model of hypoxic-ischemic brain injury (HI) followed by assessment of Krebs cycle metabolites, mitochondrial substrate preference, and H2O2 generation rate in the ischemic brain...
December 6, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29209134/metabolically-based-liver-damage-pathophysiology-in-patients-with-urea-cycle-disorders-a-new-hypothesis
#5
Ivan Ivanovski, Miloš Ješić, Ana Ivanovski, Livia Garavelli, Petar Ivanovski
The underlying pathophysiology of liver dysfunction in urea cycle disorders (UCDs) is still largely elusive. There is some evidence that the accumulation of urea cycle (UC) intermediates are toxic for hepatocyte mitochondria. It is possible that liver injury is directly caused by the toxicity of ammonia. The rarity of UCDs, the lack of checking of iron level in these patients, superficial knowledge of UC and an underestimation of the metabolic role of fumaric acid, are the main reasons that are responsible for the incomprehension of the mechanism of liver injury in patients suffering from UCDs...
November 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29206808/extrinsic-calcitonin-gene-related-peptide-inhibits-hyperoxia-induced-alveolar-epithelial-type-ii-cells-apoptosis-oxidative-stress-and-reactive-oxygen-species-ros-production-by-enhancing-notch-1-and-homocysteine-induced-endoplasmic-reticulum-protein-herp-expression
#6
Yu-Xin Bai, Fang Fang, Jia-Ling Jiang, Feng Xu
BACKGROUND Lung alveolar epithelial type II cells (AEC II) are the most important stem cells in lung tissues, which are critical for wound repair of bronchopulmonary dysplasia (BPD). This study investigated the effects of calcitonin gene-related peptide (CGRP) on AEC II cells exposed to hyperoxia. MATERIAL AND METHODS Neonatal rat AEC II cells were isolated and identified by detecting surfactant protein C (SP-C). Three small interfering RNAs targeting Notch 1 were synthesized and transfected into AEC II. A hyperoxia-exposed AEC II cell injury model was established and was divided into 8 groups...
December 5, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29206362/prevalence-of-neonate-adhesive-skin-injuries-in-a-jordanian-intensive-care-unit
#7
Laila Habiballah
AIM: To determine the prevalence of adhesive skin injuries in neonates in a Jordanian neonatal intensive care unit (NICU) and to examine the characteristics of neonates with these injuries. METHOD: A cross-sectional period-prevalence study was conducted in a NICU in Irbid National University Hospital in Jordan. A total of 169 neonates were examined for skin injuries caused by adhesive equipment. RESULTS: The prevalence of skin injuries in this population was 26...
December 5, 2017: Nursing Children and Young People
https://www.readbyqxmd.com/read/29206066/magnesium-induces-preconditioning-of-the-neonatal-brain-via-profound-mitochondrial-protection
#8
Gabriella Koning, Anna-Lena Leverin, Syam Nair, Leslie Schwendimann, Joakim Ek, Ylva Carlsson, Pierre Gressens, Claire Thornton, Xiaoyang Wang, Carina Mallard, Henrik Hagberg
Magnesium sulphate (MgSO4) given to women in preterm labor reduces cerebral palsy in their offspring but the mechanism behind this protection is unclear, limiting its effective, safe clinical implementation. Previous studies suggest that MgSO4 is not neuroprotective if administered during or after the insult, so we hypothesised that MgSO4 induces preconditioning in the immature brain. Therefore, we administered MgSO4 at various time-points before/after unilateral hypoxia-ischemia (HI) in seven-day-old rats...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29204092/effect-of-perinatal-risk-factors-on-neutrophil-gelatinase-associated-lipocalin-ngal-level-in-umbilical-and-peripheral-blood-in-neonates
#9
Agnieszka Kisiel, Maria Roszkowska-Blaim, Małgorzata Pańczyk-Tomaszewska, Anna Stelmaszczyk-Emmel, Elżbieta Górska, Maria Borszewska-Kornacka
Introduction: Acute kidney injury biomarkers are opening a new era in diagnosing kidney failure. The requirement for a specific and sensitive marker of kidney function is highly desirable in neonates because the diagnostic possibilities in this age group are not sufficient. Recent research show that neutrophil gelatinase-associated lipocalin (NGAL) can have a great potential but there is a wide range of medical conditions, that may influence their expression. The aim of the study: was to evaluate the impact of perinatal risk factors on NGAL level in neonates...
2017: Central-European Journal of Immunology
https://www.readbyqxmd.com/read/29199131/combined-therapy-involving-electroacupuncture-and-treadmill-exercise-attenuates-demyelination-in-the-corpus-callosum-by-stimulating-oligodendrogenesis-in-a-rat-model-of-neonatal-hypoxia-ischemia
#10
Malk Eun Pak, Da Hee Jung, Hong Ju Lee, Myung Jun Shin, Soo-Yeon Kim, Yong Beom Shin, Young Ju Yun, Hwa Kyoung Shin, Byung Tae Choi
We investigated whether electroacupuncture (EA) and treadmill (TM) exercise improve behaviors related to motor and memory dysfunction in a cerebral palsy-like rat model via activation of oligodendrogenesis. A neonatal hypoxia-ischemia model was created using Sprague-Dawley rats (P7), and these underwent EA stimulation and treadmill training from 3 to 5weeks after hypoxia-ischemia induction. EA treatment was delivered via electrical stimulation (2Hz, 1mA) at two acupoints, Baihui (GV20) and Zusanli (ST36). Behavioral tests showed that EA alleviated motor dysfunction caused by hypoxia-ischemia on a rotarod test, and TM exercise alleviated motor and memory dysfunction seen on cylinder and passive avoidance tests...
November 30, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29197064/postnatal-subacute-benzo-a-pyrene-exposure-caused-neurobehavioral-impairment-and-metabolomic-changes-of-cerebellum-in-the-early-adulthood-period-of-sprague-dawley-rats
#11
Chunlin Li, Jing Wang, Qiuping Su, Kai Yang, Chengzhi Chen, XueJun Jiang, Tingli Han, Shuqun Cheng, Tingting Mo, Ruiyuan Zhang, Bin Peng, Yuming Guo, Philip N Baker, Baijie Tu, Yinyin Xia
Benzo(a)pyrene (BaP) is a widespread environmental contaminant that has been associated with neurotoxicity in mammals. It has strong toxic effects on the developing central nervous system. Cerebellum is associated with locomotor activity and anxiety behavior, but there is very little research about the toxic effects of BaP in cerebellum. The present study aims to investigate the global influence of BaP subacute exposure on the metabolome of rat cerebellum. Male neonatal rats (postnatal day 5) were divided into two groups: control group and BaP-treated group (2 mg/kg/day for 7 weeks)...
December 1, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/29196880/role-of-intestinal-hsp70-in-barrier-maintenance-contribution-of-milk-to-the-induction-of-hsp70-2
#12
Rebecca M Rentea, Yuee Guo, Xiaorong Zhu, Mark W Musch, Eugene B Chang, David M Gourlay, Jennifer L Liedel
BACKGROUND: Necrotizing enterocolitis (NEC) is a gastrointestinal disease of complex etiology resulting in devastating systemic inflammation and often death in premature newborns. We previously demonstrated that formula feeding inhibits ileal expression of heat shock protein-70 (Hsp70), a critical stress protein within the intestine. Barrier function for the premature intestine is critical. We sought to determine whether reduced Hsp70 protein expression increases neonatal intestinal permeability...
December 1, 2017: Pediatric Surgery International
https://www.readbyqxmd.com/read/29196442/nephron-progenitor-cell-death-elicits-a-limited-compensatory-response-associated-with-interstitial-expansion-in-the-neonatal-kidney
#13
Sree Deepthi Muthukrishnan, Sergey Ryzhov, Michele Karolak, Leif Oxburgh
The final nephron number in an adult kidney is regulated by nephron progenitor cell availability and collecting duct branching in the fetal period. Fetal environmental perturbations that cause reductions in cell numbers in these two compartments result in low nephron endowment. Previous work has shown that maternal dietary factors influence nephron progenitor cell availability, with both caloric restriction and protein deprivation leading to reduced cell numbers through apoptosis. In this study, we evaluate the consequences of inducing nephron progenitor cell death on progenitor niche dynamics and on nephron endowment...
December 1, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/29194835/oxidative-stress-diseases-unique-to-the-perinatal-period-a-window-into-the-developing-innate-immune-response
#14
Robert M Dietz, Clyde J Wright
The innate immune system has evolved to play an integral role in the normally developing lung and brain. However, in response to oxidative stress, innate immunity, mediated by specific cellular and molecular programs and signaling, contributes to pathology in these same organ systems. Despite opposing drivers of oxidative stress, namely hyperoxia in neonatal lung injury and hypoxia/ischemia in neonatal brain injury, similar pathways-including toll-like receptors, NFκB and MAPK cascades-have been implicated in tissue damage...
November 30, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/29194416/melatonin-pharmacokinetics-following-oral-administration-in-preterm-neonates
#15
Silvia Carloni, Fabrizio Proietti, Marco Rocchi, Mariangela Longini, Lucia Marseglia, Gabriella D'Angelo, Walter Balduini, Eloisa Gitto, Giuseppe Buonocore
Melatonin possesses potential efficacy in perinatal brain injuries, and has been proposed as adjunctive pharmacological therapy in combination with hypothermia in the clinical setting. However, the pharmacokinetics of melatonin in preterm and term newborns is still unknown. The aim of this study was to analyze the pharmacokinetics of melatonin after intragastric administration in preterm infants. Preterm newborns were enrolled 24-72 h after birth, and randomly assigned to three groups receiving a single bolus of 0...
December 1, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29194174/the-effects-of-endotracheal-suctioning-in-the-pediatric-population-an-integrative-review
#16
Anna C Fisk
BACKGROUND: Critically ill pediatric patients with endotracheal tubes routinely receive endotracheal tube suctioning to clear secretions and ensure tube patency. This common practice can result in adverse effects. OBJECTIVES: The aim of this study was to evaluate the research literature on the stressors of endotracheal suctioning and consequent effect on the pediatric patient. METHODS: An integrative review was conducted using the Whittemore and Knafl modified framework for integrative reviews, and article selection was guided by the Preferred Reporting Items for Systematic Reviews and Meta-analyses flow diagram...
January 2018: Dimensions of Critical Care Nursing: DCCN
https://www.readbyqxmd.com/read/29187642/irisin-protects-mitochondria-function-during-pulmonary-ischemia-reperfusion-injury
#17
Ken Chen, Zaicheng Xu, Yukai Liu, Zhen Wang, Yu Li, Xuefei Xu, Caiyu Chen, Tianyang Xia, Qiao Liao, Yonggang Yao, Cindy Zeng, Duofen He, Yongjian Yang, Tao Tan, Jianxun Yi, Jingsong Zhou, Hua Zhu, Jianjie Ma, Chunyu Zeng
Limb remote ischemic preconditioning (RIPC) is an effective means of protection against ischemia/reperfusion (IR)-induced injury to multiple organs. Many studies are focused on identifying endocrine mechanisms that underlie the cross-talk between muscle and RIPC-mediated organ protection. We report that RIPC releases irisin, a myokine derived from the extracellular portion of fibronectin domain-containing 5 protein (FNDC5) in skeletal muscle, to protect against injury to the lung. Human patients with neonatal respiratory distress syndrome show reduced concentrations of irisin in the serum and increased irisin concentrations in the bronchoalveolar lavage fluid, suggesting transfer of irisin from circulation to the lung under physiologic stress...
November 29, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/29187166/what-is-the-safest-mode-of-delivery-for-extremely-preterm-cephalic-non-cephalic-twin-pairs-a-systematic-review-and-meta-analyses
#18
Catherine Dagenais, Anne-Mary Lewis-Mikhael, Marinela Grabovac, Amit Mukerji, Sarah D McDonald
BACKGROUND: Given the controversy around mode of delivery, our objective was to assess the evidence regarding the safest mode of delivery for actively resuscitated extremely preterm cephalic/non-cephalic twin pairs before 28 weeks of gestation. METHODS: We searched Cochrane CENTRAL, MEDLINE, EMBASE and  http://clinicaltrials.gov from January 1994 to January 2017. Two reviewers independently screened titles, abstracts and full text articles, extracted data and assessed risk of bias...
November 29, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29185054/vacuum-extraction-in-low-birth-weight-%C3%A2-2500%C3%A2-g-neonates
#19
Amir Aviram, Eran Ashwal, Liran Hiersch, Yariv Yogev
PURPOSE: To evaluate the impact of vacuum extraction on birth injuries among low birth weight neonate (2000-2499 g). METHODS: Retrospective cohort study of women with singleton pregnancies > 34 weeks, birth weight of 2000-3500 g, undergoing vacuum extraction, between 2007 and 2014. Outcomes were compared between neonates who weighed 2000-2499 g and 2500-3500 g. RESULTS: Out of 62,102 deliveries, 5064 (8.2%) met the inclusion criteria, of which 269 (5...
November 28, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/29184182/a-quantitative-method-for-microstructural-analysis-of-myelinated-axons-in-the-injured-rodent-brain
#20
Erik van Tilborg, Caren M van Kammen, Caroline G M de Theije, Maurits P A van Meer, Rick M Dijkhuizen, Cora H Nijboer
MRI studies (e.g. using diffusion tensor imaging) revealed that injury to white matter tracts, as observed in for instance perinatal white matter injury and multiple sclerosis, leads to compromised microstructure of myelinated axonal tracts. Alterations in white matter microstructure are also present in a wide range of neurological disorders including autism-spectrum disorders, schizophrenia and ADHD. Whereas currently myelin quantity measures are often used in translational animal models of white matter disease, it can be an important valuable addition to study the microstructural organization of myelination patterns in greater detail...
November 28, 2017: Scientific Reports
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