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https://www.readbyqxmd.com/read/28097491/small-interfering-rna-targeting-dickkopf-1-contributes-to-neuroprotection-after-intracerebral-hemorrhage-in-rats
#1
Zhihua Li, Xi Chen, Xiaoyang Zhang, Xiuhua Ren, Xuemei Chen, Jing Cao, Weidong Zang, Xianzhi Liu, Fuyou Guo
Excessive Dickkopf-1 (Dkk-1) plays a vital role in secondary brain injury following ischemic stroke and psychotic disease. However, it is unclear whether an increased expression of Dkk-1 occurred after intracerebral hemorrhage (ICH). The present study examined the potential role of Dkk-1 after ICH. ICH was induced by a single injection of autologous blood into the basal ganglia of rats. Dkk-1 protein levels in brain tissue and serum were detected by enzyme-linked immunosorbent assay after ICH. Rats were treated with small interfering RNA targeting Dkk-1 (siDkk-1) or vehicle following ICH...
January 17, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28087184/clinical-characteristics-of-ruptured-distal-middle-cerebral-artery-aneurysms-review-of-the-literature
#2
REVIEW
Keiji Tsutsumi, Tetsuyoshi Horiuchi, Alhusain Nagm, Yasuyuki Toba, Kazuhiro Hongo
Middle cerebral artery (MCA) aneurysms usually arise at the primary MCA bifurcation or trifurcation. Distal MCA aneurysms are rarely considered as sources of aneurysmal subarachnoid hemorrhage (SAH). It has been reported that ruptured distal MCA aneurysms are associated with head trauma, neoplastic emboli, arterial dissection, or bacterial infection. We experienced five cases of ruptured distal MCA aneurysms and evaluated their clinical characteristics. Retrospective analysis of aneurysmal SAH at Kobayashi Neurosurgical Neurological Hospital was performed from January, 2004 to December, 2014...
January 10, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28079139/blood-occludin-level-as-a-potential-biomarker-for-early-blood-brain-barrier-damage-following-ischemic-stroke
#3
Rong Pan, Kewei Yu, Theodore Weatherwax, Handong Zheng, Wenlan Liu, Ke Jian Liu
Concern about intracerebral hemorrhage (ICH) is the primary reason for withholding tPA therapy from patients with ischemic stroke. Early blood brain barrier (BBB) damage is the major risk factor for fatal post-thrombolysis ICH, but rapidly assessing BBB damage before tPA administration is highly challenging. We recently reported that ischemia induced rapid degradation of tight junction protein occludin in cerebromicrovessels. The present study investigates whether the cleaved occludin is released into the blood stream and how blood occludin levels correlate to the extent of BBB damage using a rat model of ischemic stroke...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28072704/sudden-death-due-to-the-atrioventricular-node-contusion-three-cases-report
#4
Wenhe Li, Lin Zhang, Yue Liang, Fang Tong, Yiwu Zhou
INTRODUCTION: Atrioventricular node (AVN) contusion usually results in cardiogenic shock and arrhythmia and is a rare but fatal condition. The condition is difficult to diagnose and easily overlooked because it develops rapidly and is asymptomatic. We here report 3 cases that demonstrate blunt chest impact and hemorrhages of the posterior atrioventricular junction, eventually result in death. CLINICAL FINDINGS: Autopsy and histological examination were performed on all cases...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28067671/a-fatal-case-of-coin-battery-ingestion-in-an-18-month-old-child-case-report-and-literature-review
#5
Francesco Ventura, Sara Candosin, Rosario Barranco, Alessandro Bonsignore, Luisa Andrello, Luca Tajana, Antonio Osculati
The ingestion of extraneous substances is quite common in clinical practice; it usually befalls in the pediatric age, mostly between 6 months and 6 years. In most cases, complications do not emerge, and the prognosis is considered favorable. However, when a case of battery ingestion occurs, serious adverse events may develop. The ingestion of these components is a potential life-threatening event for children.In this article, we report the case of an 18-month-old child who died from hemorrhagic shock due to an aortoesophageal fistula caused by a 20 mm lithium button battery lodged in the esophagus...
January 7, 2017: American Journal of Forensic Medicine and Pathology
https://www.readbyqxmd.com/read/28062861/incidence-locations-and-longitudinal-course-of-cerebral-microbleeds-in-european-moyamoya
#6
Holger Wenz, Ralf Wenz, Máté Maros, Gregory Ehrlich, Mansour Al-Zghloul, Christoph Groden, Alex Förster
BACKGROUND AND PURPOSE: Cerebral microbleeds (cMBs) have previously been linked with especially high incidence in Asian patients with moyamoya together with high tendency to bleed. This, presumably, is characteristic of patients with moyamoya. Herein, we, therefore, investigate retrospectively the frequency, location, and longitudinal course of cMBs in a large German cohort. METHODS: We included all patients with moyamoya who underwent standard magnetic resonance imaging, including T2*-weighted images, in our department between 1998 and 2015...
January 6, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28054340/fingolimod-confers-neuroprotection-through-activation-of-rac1-after-experimental-germinal-matrix-hemorrhage-in-rat-pups
#7
William B Rolland, Paul R Krafft, Tim Lekic, Damon Klebe, Julia LeGrand, Abby Jones Weldon, Liang Xu, John H Zhang
Fingolimod, a sphingosine-1-phosphate receptor (S1PR) agonist, is clinically available to treat multiple sclerosis and is showing promise in treating stroke. We investigated if fingolimod provides long-term protection from experimental neonatal germinal matrix hemorrhage (GMH), aiming to support a potential mechanism of acute fingolimod-induced protection. GMH was induced in P7 rats by infusion of collagenase (0.3 U) into the right ganglionic eminence. Animals euthanized at four weeks post-GMH received low or high dose fingolimod (0...
January 5, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28042109/a-new-mouse-model-of-hemorrhagic-shock-induced-acute-kidney-injury
#8
Lei Wang, Jiangping Song, Jacentha Buggs, Jin Wei, Shaohui Wang, Jie Zhang, Gensheng Zhang, Yan Lu, Kay-Pong Yip, Ruisheng Liu
Current animal models of hemorrhagic shock-induced acute kidney injury (HS-induced AKI) require extensive surgical procedures and constant monitoring of hemodynamic parameters. Application of these HS-induced AKI models in mice to produce consistent kidney injury is challenging. In the present study, we developed a simple and highly reproducible mouse model of HS-induced AKI by combining moderate bleeding and renal pedicle clamping, which was abbreviated as HS-AKI. HS was induced by retroorbital bleeding of 0...
January 1, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28042016/spontaneous-intraventricular-hemorrhage-a-rare-presentation-of-a-skull-base-mesenchymal-chondrosarcoma
#9
Altaf Ali Laghari, Gohar Javed, Muhammad Faheem Khan, Syed Ijlal Ahmed, Karim Rizwan Nathani, Riyasat Ahmed
INTRODUCTION: Chondrosarcomas (CSA) are very rare malignant slow growing tumors which develop in or near the petroclival region of the brain. We report our experience of a very rare case in which the tumor originated from left petrous bone and induced intraventricular hemorrhage (IVH) leading to an acute comatose presentation. CASE DESCRIPTION: A 28 year old male initially presented in outpatient department (OPD) with a 1 month history of headache, vomiting, vertigo and left facial numbness...
December 29, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27999766/cerebral-hemorrhage-following-chiropractic-activator-treatment-case-report-and-review-of-literature
#10
Fred L Cohen
Background Despite widespread utilization of chiropractic treatment for various ailments, there is a paucity of documentation regarding intracerebral hemorrhage related to chiropractic trauma. Stroke has been reported from cervical manipulation, although with a suggested low incidence. Activator treatment, an instrument that produces a high-velocity, low-amplitude impact to the spine, is considered especially safe. There are no prior reports of intracerebral hemorrhage resulting from a chiropractic activator treatment...
October 2016: Journal of Neurological Surgery Reports
https://www.readbyqxmd.com/read/27986386/intraocular-hemorrhages-and-retinopathy-of-prematurity-in-the-telemedicine-approaches-to-evaluating-acute-phase-retinopathy-of-prematurity-e-rop-study
#11
Ebenezer Daniel, Gui-Shuang Ying, R Michael Siatkowski, Wei Pan, Eli Smith, Graham E Quinn
PURPOSE: To describe the clinical characteristics of intraocular hemorrhages (IOHs) in infants in the Telemedicine Approaches to Evaluating Acute-Phase Retinopathy of Prematurity (e-ROP) Study and to evaluate their potential use for prediction of disease severity. DESIGN: Secondary data analysis from a prospective study. PARTICIPANTS: Preterm infants with birth weight (BW) ≤1250 g. METHODS: Infants underwent serial digital retinal imaging in both eyes starting at 32 weeks' postmenstrual age...
December 13, 2016: Ophthalmology
https://www.readbyqxmd.com/read/27979493/curcumin-attenuates-blood-brain-barrier-disruption-after-subarachnoid-hemorrhage-in-mice
#12
Jichao Yuan, Wei Liu, Haitao Zhu, Xuan Zhang, Yang Feng, Yaxing Chen, Hua Feng, Jiangkai Lin
BACKGROUND: Early brain injury, one of the most important mechanisms underlying subarachnoid hemorrhage (SAH), comprises edema formation and blood-brain barrier (BBB) disruption. Curcumin, an active extract from the rhizomes of Curcuma longa, alleviates neuroinflammation by as yet unknown neuroprotective mechanisms. In this study, we examined whether curcumin treatment ameliorates SAH-induced brain edema and BBB permeability changes, as well as the mechanisms underlying this phenomenon...
January 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/27929421/ghrelin-attenuates-intestinal-barrier-dysfunction-following-intracerebral-hemorrhage-in-mice
#13
Yijun Cheng, Yongxu Wei, Wenlei Yang, Yu Cai, Bin Chen, Guoyuan Yang, Hanbing Shang, Weiguo Zhao
Intestinal barrier dysfunction remains a critical problem in patients with intracerebral hemorrhage (ICH) and is associated with poor prognosis. Ghrelin, a brain-gut peptide, has been shown to exert protection in animal models of gastrointestinal injury. However, the effect of ghrelin on intestinal barrier dysfunction post-ICH and its possible underlying mechanisms are still unknown. This study was designed to investigate whether ghrelin administration attenuates intestinal barrier dysfunction in experimental ICH using an intrastriatal autologous blood infusion mouse model...
December 6, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27920871/suprasellar-pilocytic-astrocytoma-in-an-adult-with-hemorrhage-and-leptomeningeal-dissemination-case-report-and-review-of-literature
#14
Radwa K Soliman, Caterina Budai, Pravin Mundada, Bakar Aljohani, Elisabeth J Rushing, Spyros S Kollias
Pilocytic astrocytoma (PA) is a low-grade tumor. It has an excellent prognosis after total resection. Leptomeningeal dissemination and hemorrhage are very rare to be associated with PA and lead to unfavorable prognosis. A 35-year-old man was diagnosed with a hemorrhagic suprasellar PA in 2006. Subsequent examination in 2007 revealed another large subdural hemorrhagic lesion in the sacral region, which proved to be PA by histopathologic assessment. Other leptomeningeal foci were discovered mainly at the craniocervical junction...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920543/intestinal-permeability-in-a-patient-with-liver-cirrhosis
#15
REVIEW
Jonathan Manuel Aguirre Valadez, Liliana Rivera-Espinosa, Osvely Méndez-Guerrero, Juan Luis Chávez-Pacheco, Ignacio García Juárez, Aldo Torre
Liver cirrhosis is a worldwide public health problem, and patients with this disease are at high risk of developing complications, bacterial translocation from the intestinal lumen to the mesenteric nodes, and systemic circulation, resulting in the development of severe complications related to high mortality rate. The intestinal barrier is a structure with a physical and biochemical activity to maintain balance between the external environment, including bacteria and their products, and the internal environment...
2016: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/27868153/carnosine-attenuates-brain-oxidative-stress-and-apoptosis-after-intracerebral-hemorrhage-in-rats
#16
Rong-Xia Xie, Da-Wei Li, Xi-Chang Liu, Ming-Feng Yang, Jie Fang, Bao-Liang Sun, Zong-Yong Zhang, Xiao-Yi Yang
Carnosine, an endogenous dipeptide (β-alanyl-L-histidine), exerts multiple neuroprotective properties, but its role in intracerebral hemorrhage (ICH) remains unclear. This study investigates the effect of Carnosine on brain injury using the rat ICH model, which is established by type IV collagenase caudatum infusion. The results indicate that intraperitoneal administration of Carnosine (1000 mg/kg) significantly attenuates brain edema, blood-brain barrier (BBB) disruption, oxidative stress, microglia activation and neuronal apoptosis of perihematoma at 72 h following ICH in rats models, as convinced by preventing the disruption of tight junction protein ZO-1, occludin and claudin-5, followed by the decrease of ROS, MDA, 3-NT, 8-OHDG level and the increase of GSH-Px and SOD activity, then followed by the decline of Iba-1, ED-1, active caspase-3 and TUNEL positive cells and the decrease of IL-1β, IL-6, TNF-α, active caspase-3 and cytochrome c level...
November 21, 2016: Neurochemical Research
https://www.readbyqxmd.com/read/27867676/cardiac-magnetic-resonance-for-evaluating-catheter-related-fdg-avidity
#17
Daniel Jeong, Kenneth L Gage, Claudia G Berman, Jaime L Montilla-Soler
A 53-year-old female with a history of metastatic left arm melanoma presented for F(18) fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) which showed a moderately FDG avid focus at her port catheter tip near the cavoatrial junction. Although catheter tip related FDG avidity has previously been suggested to be bland thrombus or infection, melanoma can metastasize to unusual locations including the superior vena cava. In addition, the patient had an elevated risk of anticoagulation due to a history of hemorrhagic brain metastases...
2016: Case Reports in Radiology
https://www.readbyqxmd.com/read/27857923/a-case-of-traumatic-unilateral-internuclear-ophthalmoplegia-clinical-significance-of-susceptibility-weighted-imaging
#18
Shin-Heon Lee, Taek-Kyun Nam, Yong-Sook Park, Jeong-Taik Kwon
A 43-year-old man was admitted for head trauma after falling backward. The patient complained of diplopia. Unilateral internuclear ophthalmoplegia (INO) was diagnosed during the neurologic examination. Initially, no specific finding was shown on T2-weighted, T1-weighted, and fluid attenuated inversion recovery brain magnetic resonance image (MRI) or brain computed tomography (CT). However, susceptibility-weighted imaging (SWI) definitively demonstrated a tiny hemorrhage at the midline of the pontomesencephalic junction...
October 2016: Korean Journal of Neurotrauma
https://www.readbyqxmd.com/read/27815150/solnatide-demonstrates-profound-therapeutic-activity-in-a-rat-model-of-pulmonary-edema-induced-by-acute-hypobaric-hypoxia-and-exercise
#19
Qiquan Zhou, Dong Wang, Yunsheng Liu, Xiaohong Yang, Rudolf Lucas, Bernhard Fischer
BACKGROUND: The synthetic peptide solnatide is a novel pharmacological agent that reduces extravascular lung water, blunts reactive oxygen species production and improves lung function due to its ability to directly activate the epithelial sodium channel ENaC. We aimed to investigate the effect of solnatide in pulmonary edema induced by acute hypobaric hypoxia and exercise in rats, which is considered a model for high altitude pulmonary edema. METHODS: Sprague-Dawley rats were assigned to low altitude control and eight treatment groups...
November 1, 2016: Chest
https://www.readbyqxmd.com/read/27807801/role-of-glibenclamide-in-brain-injury-after-intracerebral-hemorrhage
#20
Bing Jiang, Lin Li, Qianwei Chen, Yihao Tao, Liming Yang, Bo Zhang, John H Zhang, Hua Feng, Zhi Chen, Jun Tang, Gang Zhu
Brain edema following intracerebral hemorrhage (ICH) causes severe secondary brain injury, and no efficient pharmacological preventions are available. The present study was designed to demonstrate the neuroprotective effects of glibenclamide on brain edema and key factors of the blood-brain barrier (BBB). The study was divided into two parts. First, we utilized an autoblood-induced rat model to investigate the expression of sulfonylurea receptor 1 (Sur1). Second, rats were randomized into sham, vehicle, and glibenclamide groups...
November 3, 2016: Translational Stroke Research
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