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neonatal stroke

Kathirvel Gopalakrishnan, Amar S More, Gary D Hankins, Tatiana N Nanovskaya, Sathish Kumar
Approximately 20% of pregnant women smoke despite intentions to quit. Smoking cessation drugs, such as nicotine replacement therapy (NRT) and bupropion, are recommended treatments. Adverse cardiovascular outcomes in offspring have raised concerns about NRT's safety during pregnancy. However, the effect of bupropion is unknown. Using a rat model, we determined whether NRT and bupropion interventions during pregnancy are safer than continued smoking on offspring's cardiovascular function. Male offspring of controls and dams exposed to cigarette smoke (1...
October 12, 2016: Reproductive Sciences
(no author information available yet)
BACKGROUND: Improving survival and extending the longevity of life for all populations requires timely, robust evidence on local mortality levels and trends. The Global Burden of Disease 2015 Study (GBD 2015) provides a comprehensive assessment of all-cause and cause-specific mortality for 249 causes in 195 countries and territories from 1980 to 2015. These results informed an in-depth investigation of observed and expected mortality patterns based on sociodemographic measures. METHODS: We estimated all-cause mortality by age, sex, geography, and year using an improved analytical approach originally developed for GBD 2013 and GBD 2010...
October 8, 2016: Lancet
Ursula I Tuor, Min Qiao, Manasi Sule, Melissa Morgunov, Tadeusz Foniok
Stroke is a major cause of disability in adults and children. Recently, we have developed an adult rat model of minor stroke containing a peri-infarct region with a modest T2 increase and mild ischemic damage. We hypothesized that a neonatal minor stroke with mild peri-ischemic changes could also be produced, but with potential ontogenic differences. Using our minor photothrombosis method, we produced a range of severities of ischemic lesions (mini, minor, moderate and severe) within magnetic resonance imaging (MRI) slices of adult and neonatal rats...
October 12, 2016: NMR in Biomedicine
M C Vallejo, A F Attaallah, O M Elzamzamy, D T Cifarelli, A L Phelps, G R Hobbs, R E Shapiro, P Ranganathan
BACKGROUND: During spinal anesthesia for cesarean delivery phenylephrine is the vasopressor of choice but can cause bradycardia. Norepinephrine has both β- and α-adrenergic activity suitable for maintaining blood pressure with less bradycardia. We hypothesized that norepinephrine would be superior to phenylephrine, requiring fewer rescue bolus interventions to maintain blood pressure. METHODS: Eighty-five parturients having spinal anesthesia for elective cesarean delivery were randomized to Group P (phenylephrine 0...
August 28, 2016: International Journal of Obstetric Anesthesia
Ursula I Tuor, Manasi Sule, Min Qiao
PURPOSE: To determine whether damage to neonatal brain is exacerbated with multiple mild cerebral insults as detected with MRI and corroborated using histology. MATERIALS AND METHODS: The combined brain injury produced by multiple procedures was compared in neonatal rats having: Sham surgery at P5, Sham surgery at P5 plus a diffuse mild transient unilateral cerebral hypoxia ischemia (HI) at P7, HI alone, and a minor photothrombotic (PT) stroke at P5 followed by HI...
October 1, 2016: Neuroscience Letters
Hai M Nguyen, Eva M Grössinger, Makoto Horiuchi, Kyle W Davis, Lee-Way Jin, Izumi Maezawa, Heike Wulff
Microglia are highly plastic cells that can assume different phenotypes in response to microenvironmental signals. Lipopolysaccharide (LPS) and interferon-γ (IFN-γ) promote differentiation into classically activated M1-like microglia, which produce high levels of pro-inflammatory cytokines and nitric oxide and are thought to contribute to neurological damage in ischemic stroke and Alzheimer's disease. IL-4 in contrast induces a phenotype associated with anti-inflammatory effects and tissue repair. We here investigated whether these microglia subsets vary in their K(+) channel expression by differentiating neonatal mouse microglia into M(LPS) and M(IL-4) microglia and studying their K(+) channel expression by whole-cell patch-clamp, quantitative PCR and immunohistochemistry...
October 3, 2016: Glia
J Fluss, M Dinomais, M Kossotoroff, C Vuillerot, S Darteyre, S Chabrier
Over the last decade considerable advances have been made in the identification, understanding and management of pediatric arterial ischemic stroke. Such increasing knowledge has also brought new perspectives and interrogations in the current acute and rehabilitative care of these patients. Areas covered: In developed countries, focal cerebral arteriopathy is one of the most common causes of arterial ischemic stroke in childhood and imaging features are well characterized. However, there are ongoing debates regarding its underlying mechanisms, natural evolution and proper management...
October 12, 2016: Expert Review of Neurotherapeutics
D Lo Presti, G Gagliardi, G M Tiralongo, I Pisani, D Farsetti, R L Scala, G P Novelli, B Vasapollo, A Andreoli, H Valensise
INTRODUCTION: Several studies have demonstrated the correlation between maternal obesity and pregnancy complications. Obese women seem to be at higher risk to develop late preeclampsia, which shows a more favorable perinatal outcome compared to the early form. The assessment of total vascular resistance (TVR) could play an additional role in the detection of these patients. Targets: To identify patients at higher risk of hypertensive complications through the assessment of pre-pregnancy maternal fat mass (FM) and TVR...
August 2016: Journal of Maternal-fetal & Neonatal Medicine
Marie-Doriane Morard, Carole Vuillerot, Mickael Dinomais, Stéphane Chabrier, Mathilde Chevignard, Kim Bull, Eleni Papathanasiou
OBJECTIVE: To translate and validate a French version of the Pediatric Stroke Outcome Measure - summary of impressions (PSOM-SOI), for application in a population of French children after neonatal arterial ischemic stroke (NAIS). The PSOM measures deficiency of body functions and structures. On completion of this examination, the PSOM-SOI was developed containing and scoring 5 subscales: right sensorimotor, left sensorimotor (each with subcategories), language production, language comprehension and cognitive/behavioral...
September 2016: Annals of Physical and Rehabilitation Medicine
Carole Vuillerot, Mickael Dinomais, Stephane Marret, Stephane Chabrier, Thierry Debillon
Neonatal arterial ischemic stroke (NAIS) affects one child in 6-17 100,000-birth term neonates, most of these children will keep long-term motor and cognitive impairment. In 2014, initiated by the French Center for Pediatric Stroke in association with the French Society of Neonatology, a steering committee was created to propose clinical guidelines after NAIS. From all the relevant questions, the importance is given to long-term outcomes after a NAIS with a need for a better description of motor and cognitive outcomes after a NAIS in order to propose a more consensual monitoring for these children to improve their management...
September 2016: Annals of Physical and Rehabilitation Medicine
Mickaël Dinomais
Long-term motor performances after unilateral neonatal stroke are variable. The presence of motor deficits may be related to structural characteristic (size and location) of the infarct site but also in brain area remote from this injury (cerebellum and thalamus). Analyzing in functional MRI and structural MRI the relationship between long-term motor performance and motor system after neonatal stroke could provide cerebral target for therapy.
September 2016: Annals of Physical and Rehabilitation Medicine
Floris Groenendaal, Linda S de Vries
In the past brain imaging of term infants with HIE was performed with cranial ultrasound (cUS) and computed tomography (CT). Both techniques have several disadvantages, sensitivity and specificity are limited compared to MRI, and CT makes use of radiation.At present MRI including diffusion weighted MRI during the first week of life, has become the method of choice for imaging infants with HIE. In addition to imaging, blood vessels and blood flow can be visualized using MR angiography, MR venography, and arterial spin labeling...
September 27, 2016: Pediatric Research
Gavin P Guy, Hua Z Ling, Paula Garcia, Liona C Poon, Kypros H Nicolaides
OBJECTIVE: To examine the possible effects of maternal characteristics and obstetric and medical history on maternal cardiovascular parameters at 35-37 weeks' gestation. METHODS: In 3,013 singleton pregnancies at 35-37 weeks maternal characteristics and medical history were recorded; uterine artery pulsatility index, mean arterial pressure (MAP) and maternal cardiovascular parameters were measured. Multivariable regression analysis was used to determine significant predictors of the cardiovascular parameters amongst gestational age (GA), maternal characteristics and medical history...
September 27, 2016: Ultrasound in Obstetrics & Gynecology
Froylán Vargas-Martínez, Richard J Schanler, Steven A Abrams, Keli M Hawthorne, Susan Landers, José Guzman-Bárcenas, Onofre Muñoz, Tore Henriksen, Maria Petersson, Kerstin Uvnäs-Moberg, Ismael Jiménez-Estrada
Hypertension is a major risk factor for ischemic heart disease and stroke, leading causes of morbidity and death worldwide. Intrauterine growth restriction (IUGR), caused by an excess of glucocorticoid exposure to the fetus, produces an imbalance in oxidative stress altering many biochemical and epigenetic gene transcription processes exposing the fetus and neonate to the 'thrifty' phenotype and pervasive polymorphisms appearance damaging health, cognitive, and behavioral processes in later life. OT is a major regulator of oxidative stress radicals that plays a major role in neonatal maturation of the central nervous system and many peripheral tissues expressing oxytocin/oxytocin-receptor (OT/OTR) system in the early postnatal period...
September 20, 2016: Biochimica et Biophysica Acta
Hiroko Mori, Ken Momosaki, Jun Kido, Tetsuo Naramura, Kenichi Tanaka, Shirou Matsumoto, Kimitoshi Nakamura, Hiroshi Mitsubuchi, Fumio Endo, Masanori Iwai
BACKGROUND: Glycine protected adult brains against injury in an experimental model of stroke. However, because the ischemic response of neonatal brains differs from that of adult brains, we examined the neuroprotective efficacy of glycine and associated mechanisms in an experimental model of neonatal hypoxic-ischemic (HI) encephalopathy. METHODS: Neonatal (P7) Wister rats were randomly divided into an untreated group (non-HI) and two HI groups that were treated with left common carotid artery ligation and saline control or glycine...
September 10, 2016: Pediatrics International: Official Journal of the Japan Pediatric Society
Rebecca R Adami, Maureen E Grundy, Andrea Poretti, Ryan J Felling, Monica Lemmon, Ernest M Graham
OBJECTIVE: To identify perinatal risk factors that can distinguish arterial ischemic stroke from hypoxic-ischemic encephalopathy at birth. METHODS: This is a cohort study of all neonates born at 35 weeks of gestation or greater admitted to our neonatal intensive care unit from January 1, 2010, to December 31, 2015, that compares neonates with stroke with those with hypoxic-ischemic encephalopathy undergoing whole-body hypothermia with abnormal brain magnetic resonance imaging...
October 2016: Obstetrics and Gynecology
Marlene Biermayr, Barbara Brunner, Kathrin Maurer, Rudolf Trawoeger, Ursula Kiechl-Kohlendorfer, Vera Neubauer
BACKGROUND: Thrombosis in neonates is commonly a central venous access device (CVAD) associated complication. Furthermore, a patent foramen ovale (PFO) is frequently seen in preterm infants. Even though a coincidence of both is not unusual, detaching of the thrombus and organisation of an aortic embolism has not been described until now. Treatment recommendations of CVAD-associated thrombosis in neonates do not consider frequently seen complications of preterm infants e.g. intraventricular haemorrhage...
2016: BMC Pediatrics
Malgorzata Ziemka-Nalecz, Joanna Jaworska, Joanna Sypecka, Rafał Polowy, Robert K Filipkowski, Teresa Zalewska
Neonatal hypoxic-ischemic (HI) injury still remains an important issue as it is a major cause of neonatal death and neurological dysfunctions. Currently, there are no well-established treatments to reduce brain damage and its long-term sequel in infants. Recently, reported data show that histone deacetylase inhibitors provide neuroprotection in adult stroke models. However, the proof of their relevance in vivo after neonatal HI brain injury remains particularly limited. In the present study, we show neuroprotective/neurogenic effect of sodium butyrate (SB), one of histone deacetylase inhibitors (HDACis), in the dentate gyrus of HI-injured immature rats...
August 30, 2016: Molecular Neurobiology
Alexander Drofa, Evgueni Kouznetsov, Stephen Tomek, Matthew Wiisanen, Michael Manchak, Timothy Lindley, Steven Mitchell, Ferdinand Hui, Dane Breker
Cerebral sinus venous thrombosis (CSVT) is a recognized cause of childhood and neonatal stroke. More than 50% of neonates have a poor outcome, and mortality is high. Coma is a predictor of death in neonatal CSVT. We present the case of a 9-day-old infant, who presented in coma and was treated successfully with a combination of mechanical thrombectomy using the MindFrame System via the right jugular vein, local infusion of recombinant tissue plasminogen activator and abciximab, as well as anticoagulation. In this case, aggressive thrombectomy and thrombolysis achieved complete neurologic restoration safely and quickly...
2016: Pediatric Neurosurgery
Anup Katheria, Debra Poeltler, Jayson Durham, Jane Steen, Wade Rich, Kathy Arnell, Mauricio Maldonado, Larry Cousins, Neil Finer
OBJECTIVE: To assess whether providing ventilation during delayed cord clamping (V-DCC) increases placental transfusion compared with delayed cord clamping alone (DCC only). STUDY DESIGN: Inborn premature infants (23(0/7)-31(6/7) weeks' gestational age) were randomized to receive at least 60 seconds of V-DCC (initial continuous positive airway pressure) with addition of positive pressure ventilation if needed) or without assisted ventilation (DCC only). For the DCC-only group, infants were dried and stimulated by gently rubbing the back if apneic...
August 26, 2016: Journal of Pediatrics
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