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https://www.readbyqxmd.com/read/28726776/autophagosome-maturation-mediated-by-rab7-contributes-to-neuroprotection-of-hypoxic-preconditioning-against-global-cerebral-ischemia-in-rats
#1
Lixuan Zhan, Siyuan Chen, Kongping Li, Donghai Liang, Xinyong Zhu, Liu Liu, Zhiwei Lu, Weiwen Sun, En Xu
Autophagy disruption leads to neuronal damage in hypoxic-ischemic brain injury. Rab7, a member of the Rab GTPase superfamily, has a unique role in the regulation of autophagy. Hypoxic preconditioning (HPC) provides neuroprotection against transient global cerebral ischemia (tGCI). However, the underlying mechanisms remain poorly understood. Thus, the current study explored the potential molecular mechanism of the neuroprotective effect of HPC by investigating how Rab7 mediates autophagosome (AP) maturation after tGCI in adult rats...
July 20, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28724891/hypoxia-inducible-factor-1-alpha-is-involved-in-rip-induced-necroptosis-caused-by-in-vitro-and-in-vivo-ischemic-brain-injury
#2
Xiao-Sa Yang, Tai-Long Yi, Sai Zhang, Zhong-Wei Xu, Ze-Qi Yu, Hong-Tao Sun, Cheng Yang, Yue Tu, Shi-Xiang Cheng
Necroptosis, a novel type of programmed cell death, is involved in stroke-induced ischemic brain injury. Although studies have sought to explore the mechanisms of necroptosis, its signaling pathway has not yet to be completely elucidated. Thus, we used oxygen-glucose deprivation (OGD) and middle cerebral artery occlusion (MCAO) models mimicking ischemic stroke (IS) conditions to investigate mechanisms of necroptosis. We found that OGD and MCAO induced cell death, local brain ischemia and neurological deficit, while zVAD-fmk (zVAD, an apoptotic inhibitor), GSK'872 (a receptor interacting protein kinase-3 (RIP3) inhibitor), and combined treatment alleviated cell death and ischemic brain injury...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28708694/structural-neuroimaging-and-early-neuroprognostication-of-hypoxic-ischemic-brain-injury-in-cardiac-arrest-survivors
#3
Mohamed Y Rady, Joseph L Verheijde
No abstract text is available yet for this article.
August 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28707399/neuroglobin-and-friends
#4
REVIEW
Marco Fiocchetti, Manuela Cipolletti, Valentina Brandi, Fabio Polticelli, Paolo Ascenzi
In the year 2000, the third member of the globin family was discovered in human and mouse brain and named neuroglobin (Ngb). Neuroglobin overexpression significantly protects both heart and brain from hypoxic/ischemic and oxidative stress-related insults, whereas decreased Ngb levels lead to an exacerbation of tissue injuries. Moreover, Ngb overexpression protects neurons from mitochondrial dysfunctions and neurodegenerative disorders such as Alzheimer disease; however, it facilitates the survival of cancer cells...
July 14, 2017: Journal of Molecular Recognition: JMR
https://www.readbyqxmd.com/read/28706860/targeted-temperature-management-in-neurological-intensive-care-unit
#5
REVIEW
Sombat Muengtaweepongsa, Winchana Srivilaithon
Targeted temperature management (TTM) shows the most promising neuroprotective therapy against hypoxic/ischemic encephalopathy (HIE). In addition, TTM is also useful for treatment of elevated intracranial pressure (ICP). HIE and elevated ICP are common catastrophic conditions in patients admitted in Neurologic intensive care unit (ICU). The most common cause of HIE is cardiac arrest. Randomized control trials demonstrate clinical benefits of TTM in patients with post-cardiac arrest. Although clinical benefit of ICP control by TTM in some specific critical condition, for an example in traumatic brain injury, is still controversial, efficacy of ICP control by TTM is confirmed by both in vivo and in vitro studies...
June 26, 2017: World Journal of Methodology
https://www.readbyqxmd.com/read/28706729/a-retrospective-review-of-the-pediatric-development-clinic-implementation-a-model-to-improve-medical-nutritional-and-developmental-outcomes-of-at-risk-under-five-children-in-rural-rwanda
#6
Eric Ngabireyimana, Christine Mutaganzwa, Catherine M Kirk, Ann C Miller, Kim Wilson, Evodia Dushimimana, Olivier Bigirumwami, Evelyne S Mukakabano, Fulgence Nkikabahizi, Hema Magge
BACKGROUND: As more high-risk newborns survive the neonatal period, they remain at significant medical, nutritional, and developmental risk. However, no follow-up system for early intervention exists in most developing countries. In 2014, a novel Pediatric Development Clinic (PDC) was implemented to provide comprehensive follow-up to at-risk under-five children, led by nurses and social workers in a district hospital and surrounding health centers in rural Rwanda. METHODS: At each PDC visit, children undergo clinical/nutritional assessment and caregivers participate in counseling sessions...
2017: Maternal Health, Neonatology and Perinatology
https://www.readbyqxmd.com/read/28706574/neuronal-damage-induced-by-perinatal-asphyxia-is-attenuated-by-postinjury-glutaredoxin-2-administration
#7
Juan Ignacio Romero, Mariana Inés Holubiec, Tamara Logica Tornatore, Stéphanie Rivière, Eva-Maria Hanschmann, Rodolfo Alberto Kölliker-Frers, Julia Tau, Eduardo Blanco, Pablo Galeano, Fernando Rodríguez de Fonseca, Christopher Horst Lillig, Francisco Capani
The general disruption of redox signaling following an ischemia-reperfusion episode has been proposed as a crucial component in neuronal death and consequently brain damage. Thioredoxin (Trx) family proteins control redox reactions and ensure protein regulation via specific, oxidative posttranslational modifications as part of cellular signaling processes. Trx proteins function in the manifestation, progression, and recovery following hypoxic/ischemic damage. Here, we analyzed the neuroprotective effects of postinjury, exogenous administration of Grx2 and Trx1 in a neonatal hypoxia/ischemia model...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28704822/prediction-of-outcome-in-neonates-with-hypoxic-ischemic-encephalopathy-ii-role-of-amplitude-integrated-electroencephalography-and-cerebral-oxygen-saturation-measured-by-near-infrared-spectroscopy
#8
Katharina Goeral, Berndt Urlesberger, Vito Giordano, Gregor Kasprian, Michael Wagner, Lisa Schmidt, Angelika Berger, Katrin Klebermass-Schrehof, Monika Olischar
BACKGROUND: Few data have been published on the combined use of amplitude-integrated electroencephalography (aEEG) and near-infrared spectroscopy (NIRS) for outcome prediction in neonates cooled for hypoxic-ischemic encephalopathy (HIE). OBJECTIVE: Our aim was to evaluate the predictive values and the most powerful predictive combinations of single aEEG and NIRS parameters and the respective cut-off values with regard to short-term outcomes in HIE II. METHODS: aEEG and NIRS were prospectively studied at the Medical University of Vienna in the first 102 h of life with regard to magnetic resonance imaging (MRI)...
July 14, 2017: Neonatology
https://www.readbyqxmd.com/read/28704294/early-detection-of-neonatal-hypoxic-ischemic-white-matter-injury-an-mr-diffusion-tensor-imaging-study
#9
Youngseob Seo, Geun-Tae Kim, Jin Wook Choi
The purpose of this study was to compare diffusion tensor metrics in normal age-matched neonates with survivors of hypoxic-ischemic encephalopathy (HIE) and extracorporeal membrane oxygenation (ECMO). Thirty-five normal, 27 HIE, and 13 ECMO infants underwent MRI at 3 T. Neurodevelopmental assessments were performed. Fractional anisotropy (FA), axial diffusivity (AD), and radial diffusivity (RD) of the inferior fronto-occipital fasciculus, inferior longitudinal fasciculus, anterior commissure, genu corpus callosum and splenium of the corpus callosum, anterior and posterior limb of the internal capsule, superior longitudinal fasciculus, and the centrum semiovale were analyzed with tract-based spatial statistics modified for use in neonates...
July 12, 2017: Neuroreport
https://www.readbyqxmd.com/read/28703794/impaired-autophagosome-clearance-contributes-to-neuronal-death-in-a-piglet-model-of-neonatal-hypoxic-ischemic-encephalopathy
#10
Derong Cui, Dawei Sun, Xintao Wang, Liye Yi, Ewa Kulikowicz, Michael Reyes, Junchao Zhu, Zeng-Jin Yang, Wei Jiang, Raymond C Koehler
To examine the temporal relationship of cortical autophagic flux with delayed neuronal cell death after hypoxia-ischemia (HI) in neonatal piglets. HI was produced with 45-min hypoxia and 7-min airway occlusion in 3-5-day-old piglets. Markers of autophagic, lysosomal and cell death signaling were studied via immunohistochemistry, immunoblotting, and histochemistry in piglet brains. In vitro, autophagy was impaired in cultured mouse cortical neurons treated with chloroquine with or without rapamycin for 1 d in the presence of Z-VAD-fmk, cyclosporine A, or vehicle control, and cell viability was assessed with the MTT assay...
July 13, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28700093/interleukin-10-release-from-astrocytes-suppresses-neuronal-apoptosis-via-the-tlr2-nf%C3%AE%C2%BAb-pathway-in-a-neonatal-rat-model-of-hypoxic-ischemic-brain-damage
#11
Mu Lan He, Ze Yu Lv, Xia Shi, Ting Yang, Yun Zhang, Ting-Yu Li, Jie Chen
The biological function of Interleukin-10 (IL-10) and the relationship between IL-10 secretion and the Toll-like receptor 2 (TLR2) expression levels in the central nervous system following hypoxic-ischemic brain damage (HIBD) are poorly understood. Here, we intend to elucidate the biological function and mechanism of IL-10 secretion following HIBD. In the current study, we used a neonatal rat model of HIBD and found that rats injected with adeno-associated virus (AAV)-IL-10-shRNA (short hairpin RNA) exhibited partially impaired learning and memory function compared to rats administered AAV-control-shRNA...
July 12, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28699679/one-session-of-remote-ischemic-preconditioning-does-not-improve-vascular-function-in-acute-normobaric-and-chronic-hypobaric-hypoxia
#12
Mathew G Rieger, Ryan L Hoiland, Joshua C Tremblay, Mike Stembridge, Anthony R Bain, Daniela Flück, Prajan Subedi, James D Anholm, Philip N Ainslie
Application of repeated short duration bouts of ischemia to the limbs, termed remote ischemic preconditioning (RIPC), is a novel technique that may have protective effects on vascular function during hypoxic exposures. In separate parallel-design studies, at sea-level (SL; n = 16), and after 8-12 days at high-altitude (HA; n = 12; White Mountain, 3800 m), participants underwent either a sham protocol or one session of 4 × 5 minutes of dual-thigh cuff occlusion with 5 minutes recovery. Brachial artery flow-mediated dilation (FMD; ultrasound), pulmonary artery systolic pressure (PASP; echocardiography), and internal carotid artery flow (ICA; ultrasound) were measured at SL in normoxia and isocapnic hypoxia [end-tidal PO₂ (PETO₂) maintained to 50 mmHg], and during normal breathing at HA...
July 12, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28698869/effects-of-poly-adp-ribose-polymerase-1-inhibition-in-a-neonatal-rodent-model-of-hypoxic-ischemic-injury
#13
Melanie Klöfers, Jules Kohaut, Ivo Bendix, Josephine Herz, Vinzenz Boos, Ursula Felderhoff-Müser, Mark Dzietko
BACKGROUND: Hypoxia ischemia (HI) to the developing brain occurs in 1-6 in 1000 live births. Large numbers of survivors have neurological long-term sequelae. However, mechanisms of recovery after HI are not understood and preventive measures or clinical treatments are not effective. Poly(ADP-ribose) polymerase-1 is overactivated in response to ischemia. In neonatal mice HI activates PARP-1 but its role in perinatal brain injury remains uncertain. OBJECTIVE: Aim of this study was to explore the effect of TES448 (PARP-1-inhibitor) and hypothermia after an ischemic insult...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28695691/neonatal-therapeutic-hypothermia-outside-of-standard-guidelines-a-survey-of-u-s-neonatologists
#14
Jennifer Burnsed, Santina A Zanelli
AIM: Therapeutic hypothermia is standard of care in term infants with moderate-to-severe hypoxic-ischemic encephalopathy (HIE). The goal of this survey was to explore the attitudes of U.S. neonatologists caring for infants with HIE who fall outside of current guidelines. METHOD: Case-based survey administered to members of the Section on Neonatal-Perinatal Medicine of American Academy of Pediatrics. RESULTS: 447 responses were analyzed, i...
July 11, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28690645/neuroprotective-effects-of-erythropoietin-against-hypoxic-injury-via-modulation-of-the-mitogen-activated-protein-kinase-pathway-and-apoptosis
#15
Ji Eun Jeong, Jae Hyun Park, Chun Soo Kim, Sang Lak Lee, Hai Lee Chung, Woo Taek Kim, Eun Joo Lee
PURPOSE: Hypoxic-ischemic encephalopathy is a significant cause of neonatal morbidity and mortality. Erythropoietin (EPO) is emerging as a therapeutic candidate for neuroprotection. Therefore, this study was designed to determine the neuroprotective role of recombinant human EPO (rHuEPO) and the possible mechanisms by which mitogen-activated protein kinase (MAPK) signaling pathway including extracellular signal-regulated kinase (ERK1/2), JNK, and p38 MAPK is modulated in cultured cortical neuronal cells and astrocytes...
June 2017: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/28686927/servo-controlled-versus-manual-cooling-methods-in-neonates-with-hypoxic-ischemic-encephalopathy
#16
Ashok Buchiboyina, Eric Ma, Andrew Yip, Deepika Wagh, Jason Tan, Judy McMichael, Max Bulsara, Shripada Rao
BACKGROUND: Therapeutic hypothermia is known to improve outcomes in neonates with hypoxic ischemic encephalopathy (HIE). There are no studies that have compared servo controlled cooling (SCC) versus manually controlled cooling (MCC) methods in HIE. AIM: To compare the outcomes of SCC versus MCC in neonates with HIE. METHODS AND OUTCOME MEASURES: Between Jan 2008 and May 2011, MCC with cool-gel packs was used to achieve rectal temperatures of 33...
July 4, 2017: Early Human Development
https://www.readbyqxmd.com/read/28686592/can-cerebellar-and-brainstem-apparent-diffusion-coefficient-adc-values-predict-neuromotor-outcome-in-term-neonates-with-hypoxic-ischemic-encephalopathy-hie-treated-with-hypothermia
#17
Gemma Arca-Díaz, Thomas J Re, Marie Drottar, Carmen Rosa Fortuno, Katyucia De Macedo-Rodrigues, Kiho Im, Josep Figueras-Aloy, Patricia Ellen Grant
BACKGROUND AND PURPOSE: To determine the apparent diffusion coefficient (ADC) in specific infratentorial brain structures during the first week of life and its relation with neuromotor outcome for Hypoxic-ischemic encephalopathy (HIE) in term neonates with and without whole-body hypothermia (TH). MATERIALS AND METHODS: We retrospectively evaluated 45 MRI studies performed in the first week of life of term neonates born between 2010 and 2013 at Boston Children's Hospital...
2017: PloS One
https://www.readbyqxmd.com/read/28685447/diet-induced-ketosis-protects-against-focal-cerebral-ischemia-in-mouse
#18
Kui Xu, Lena Ye, Katyayini Sharma, Yongming Jin, Matthew M Harrison, Tylor Caldwell, Jessica M Berthiaume, Yu Luo, Joseph C LaManna, Michelle A Puchowicz
Over the past decade we have consistently shown that ketosis is neuroprotective against ischemic insults in rats. We reported that diet-induced ketotic rats had a significant reduction in infarct volume when subjected to middle cerebral artery occlusion (MCAO), and improved survival and recovery after cardiac arrest and resuscitation. The neuroprotective mechanisms of ketosis (via ketogenic diet; KG) include (i) ketones are alternate energy substrates that can restore energy balance when glucose metabolism is deficient and (ii) ketones modulate cell-signalling pathways that are cytoprotective...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28680296/distribution-and-function-of-the-bestrophin-1-best1-channel-in-the-brain
#19
REVIEW
Soo-Jin Oh, C Justin Lee
Bestrophin-1 (Best1) is a calcium-activated anion channel identified from retinal pigment epithelium where human mutations are associated with Best's macular degeneration. Best1 is known to be expressed in a variety of tissues including the brain, and is thought to be involved in many physiological processes. This review focuses on the current state of knowledge on aspects of expression and function of Best1 in the brain. Best1 protein is observed in cortical and hippocampal astrocytes, in cerebellar Bergmann glia and lamellar astrocytes, in thalamic reticular neurons, in meninges and in the epithelial cells of the choroid plexus...
June 2017: Experimental Neurobiology
https://www.readbyqxmd.com/read/28678158/early-hippocampal-i-ltp-and-lox-1-overexpression-induced-by-anoxia-a-potential-role-in-neurodegeneration-in-npc-mouse-model
#20
Adriana Lo Castro, Michela Murdocca, Sabina Pucci, Anna Zaratti, Chiara Greggi, Federica Sangiuolo, Virginia Tancredi, Claudio Frank, Giovanna D'Arcangelo
Niemann-Pick type C disease (NPCD) is an autosomal recessive storage disorder, characterized by abnormal sequestration of unesterified cholesterol within the late endo-lysosomal compartment of cells. In the central nervous system, hypoxic insults could result in low-density lipoprotein (LDL) oxidation and Lectin-like oxidized LDL receptor-1 (LOX-1) induction, leading to a pathological hippocampal response, namely, ischemic long-term potentiation (i-LTP). These events may correlate with the progressive neural loss observed in NPCD...
July 5, 2017: International Journal of Molecular Sciences
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