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Spinal cord ischemia

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https://www.readbyqxmd.com/read/29138973/surgical-ligation-of-spinal-dural-arteriovenous-fistula
#1
Thomas Sorenson, Enrico Giordan, Delia Cannizzaro, Giuseppe Lanzino
BACKGROUND: Spinal dural arteriovenous fistulas (SDAVFs) are abnormal arteriovenous shunts between a radicular artery and the radicular vein, located in the dorsal surface of the dura sleeve, which drains in a retrograde manner into the coronal venous plexus of the spinal cord without an interposed capillary network. This result is a venous hypertension that reduces spinal cord perfusion and leads to ischemia and edema. Spontaneous resolution is extremely rare and, once symptomatic, the typical course is further progression with increased neurological impairment...
November 14, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29130941/remote-ischemia-preconditioning-attenuates-blood-spinal-cord-barrier-breakdown-in-rats-undergoing-spinal-cord-ischemia-reperfusion-injury-associated-with-activation-and-upregulation-of-cb1-and-cb2-receptors
#2
Na Jing, Bo Fang, Zhi-Lin Wang, Hong Ma
BACKGROUND/AIMS: Remote ischemic preconditioning (RIPC) has protective effects on spinal cord ischemia reperfusion (I/R) injury, but the potential mechanisms remain unclear. In our study, the effects and underlying mechanisms of RIPC on blood-spinal cord barrier (BSCB) breakdown following I/R injury were investigated. METHODS: animals underwent intraperitoneal administration with cannabinoid-1 (CB1) receptor antagonist AM251, cannabinoid-2 (CB2) receptor antagonist AM630 or vehicle 15 minutes before three 3-minute occlusion-reperfusion cycles on the right femoral artery or a sham operation...
October 31, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29125103/effect-of-calcium-sensing-receptor-on-the-apoptosis-of-rat-spinal-cord-neurons-in-anoxia-reoxygenation-injury-and-its-significance
#3
Wei He, Ji-Fu Sun, Run-Yu Jiang, Zhi-Jian Zhang, Qian Chen, Yong-Hui Huang
Objective To investigate the effect and significance of calcium-sensing receptor (CaSR) on the apoptosis of rat spinal cord neurons in anoxia/reoxygenation(A/R) injury. Methods The spinal cells were in ischemia and hypoxia environment for 1 h and in normal environment for 24 h to establish a model of A/R. After spinal A/R model was established,the spinal cells were divided into four groups randomly:the control group,A/R group,A/R+GdCl3 group,and A/R+NPS-2390 group. The expression of CaSR in each group was detected by immunofluorescence and Western blotting...
October 30, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/29125039/astrocyte-autophagy-flux-protects-neurons-against-oxygen-glucose-deprivation-and-ischemic-reperfusion-injury
#4
Xue Liu, Fengfeng Tian, Shiquan Wang, Feng Wang, Lize Xiong
The role of autophagy varies with the type of acute brain injury. In general, autophagy mediates a clear neuroprotective effect in intoxication caused by various psychoactive agents, subarachnoid hemorrhage and spinal cord injury. In contrast, autophagic cell death has also been reported to actively contribute to neuronal loss in neonatal hypoxic ischemic encephalopathy. However, it still remains to be determined whether autophagy pays a cytoprotective or a cytotoxic role in stroke. Previous studies focused primarily on the role of neurons rather than the role of astrocytes in brain injury...
November 10, 2017: Rejuvenation Research
https://www.readbyqxmd.com/read/29122422/comparison-of-open-surgical-techniques-for-repair-of-types-iii-and-iv-thoracoabdominal-aortic-aneurysms
#5
Muhammad A Rana, Peter Gloviczki, Audra A Duncan, Manju Kalra, Kevin L Greason, Gustavo S Oderich, Stephen S Cha, Thomas C Bower
OBJECTIVE: The objective of this study was to compare outcomes after repair of type III and type IV thoracoabdominal aortic aneurysms (TAAAs) by three different open surgical techniques at a tertiary care institution. METHODS: Consecutive patients who underwent elective repair of type III and type IV TAAAs at our institution between 1999 and 2011 were retrospectively reviewed. Patients were divided into three groups according to surgical technique: clamp and sew (CS), left-sided heart bypass (LHB), and visceral branching (VB) followed by aortic reconstruction...
November 6, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29100806/comparison-of-sacrificed-healthy-aorta-during-thoracoabdominal-aortic-aneurysm-repair-using-off-the-shelf-endovascular-branched-devices-and-open-surgery
#6
Luca Bertoglio, Tommaso Cambiaghi, Ciro Ferrer, Domenico Baccellieri, Fabio Verzini, Germano Melissano, Roberto Chiesa, Yamume Tshomba
BACKGROUND: Off-the-shelf devices for branched endovascular aortic repair of thoracoabdominal aortic aneurysm (TAAA) have been developed to overcome the manufacturing- and logistics-related delays characteristic of device customization. Nonetheless, the structural requirements of branched endovascular aortic repair, together with the need for additional thoracic components to suit different anatomies, might lead to a large sacrifice of healthy aorta. METHODS: We enrolled 18 consecutive TAAA patients treated between 2010 and 2016 in two centers employing the off-the-shelf t-Branch (Cook Medical, Bloomington, Ind) device (TB group)...
October 31, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29100648/erythropoietin-s-beta-common-receptor-mediates-neuroprotection-in-spinal-cord-neurons
#7
Lisa S Foley, David A Fullerton, Joshua Mares, Mitchell Sungelo, Michael J Weyant, Joseph C Cleveland, T Brett Reece
BACKGROUND: Paraplegia from spinal cord ischemia-reperfusion (SCIR) remains an elusive and devastating complication of complex aortic operations. Erythropoietin (EPO) attenuates this injury in models of SCIR. Upregulation of the EPO beta common receptor (βcR) is associated with reduced damage in models of neural injury. The purpose of this study was to examine whether EPO-mediated neuroprotection was dependent on βcR expression. We hypothesized that spinal cord neurons subjected to oxygen-glucose deprivation would mimic SCIR injury in aortic surgery and EPO treatment attenuates this injury in a βcR-dependent fashion...
October 31, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29099428/neuroprotective-effects-of-fasudil-a-rho-kinase-inhibitor-after-spinal-cord-ischemia-and-reperfusion-in-rats
#8
Masahiko Ohbuchi, Tetsu Kimura, Toshiaki Nishikawa, Takashi Horiguchi, Masayuki Fukuda, Yoko Masaki
BACKGROUND: Excessive Rho/Rho-kinase pathway activation occurs subsequent to stroke. We examined the neuroprotective effects of pre- and posttreatment with fasudil (a Rho-kinase inhibitor) in a rat transient spinal cord ischemia-reperfusion model under normothermic conditions. METHODS: After approval by our animal research committee, male Sprague-Dawley rats were assigned to 1 of 6 groups: pre- and postcontrol (C); pre- and postfasudil (F); and pre- and postsham (S)...
November 1, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29097044/standard-off-the-shelf-multibranched-thoracoabdominal-endograft-in-urgent-and-elective-patients-with-single-and-staged-procedures-in-a-multicenter-experience
#9
Roberto Silingardi, Stefano Gennai, Nicola Leone, Mauro Gargiulo, Gianluca Faggioli, Piergiorgio Cao, Fabio Verzini, Arnaldo Ippoliti, Nicola Tusini, Carmelo Ricci, Michele Antonello, Roberto Chiesa, Enrico Maria Marone, Nicola Mangialardi, Francesco Speziale, Gian Franco Veraldi, Stefano Bonardelli, Luigi Marcheselli
OBJECTIVE: The objective of this study was to assess immediate and midterm outcomes for urgent/emergent and elective patients with thoracoabdominal aortic aneurysms (TAAAs) treated with the first commercially available "off-the-shelf" multibranched endograft for endovascular aneurysm repair, with a single-step or a staged surgical approach. METHODS: A multicenter, nonrandomized, retrospective study was conducted of TAAA patients grouped by urgent/emergent and elective treatment with multibranched endograft for endovascular aneurysm repair at 13 Italian centers from November 2012 to August 2016...
October 31, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29094209/comparison-of-the-protective-effects-of-direct-ischemic-preconditioning-and-remote-ischemic-preconditioning-in-a-rabbit-model-of-transient-spinal-cord-ischemia
#10
Takehiko Fukui, Kazuyoshi Ishida, Yoichi Mizukami, Kiyotaka Shiramoto, Hidenori Harada, Atsuo Yamashita, Satoshi Yamashita, Mishiya Matsumoto
INTRODUCTION: This study aimed to determine the relative potency of direct ischemic preconditioning (DIPC) and remote ischemic preconditioning (RIPC) for protection against ischemic spinal cord injury in rabbits and to explore the mechanisms involved. METHODS: In experiment 1, we compared the neurological and histopathological outcomes of DIPC, kidney RIPC, and limb RIPC. The DIPC and kidney RIPC groups received two cycles of 5-min occlusion/15-min reperfusion of the abdominal aorta and left renal artery, respectively...
November 1, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/29061187/elevated-microrna-129-5p-level-ameliorates-neuroinflammation-and-blood-spinal-cord-barrier-damage-after-ischemia-reperfusion-by-inhibiting-hmgb1-and-the-tlr3-cytokine-pathway
#11
Xiao-Qian Li, Feng-Shou Chen, Wen-Fei Tan, Bo Fang, Zai-Li Zhang, Hong Ma
BACKGROUND: Ischemia-reperfusion (IR) affects microRNA (miR) expression and causes substantial inflammation. Multiple roles of the tumor suppressor miR-129-5p in cerebral IR have recently been reported, but its functions in the spinal cord are unclear. Here, we investigated the role of miR-129-5p after spinal cord IR, particularly in regulating high-mobility group box-1 (HMGB1) and the Toll-like receptor (TLR)-3 pathway. METHODS: Ischemia was induced via 5-min occlusion of the aortic arch...
October 23, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29057179/chiari-i-malformation-and-spinal-cord-ischemia-in-a-cadaver
#12
Faizullah Mashriqi, Marios Loukas, Rod J Oskouian, Anthony V D'Antoni, R Shane Tubbs
With advanced imaging, the Chiari I malformation (CIM) is more frequently diagnosed than in the past when this entity was identified most commonly at autopsy. Herein, we report the rare case of an adult cadaver found not only to have CIM but also adjacent spinal cord ischemia. This case is discussed in the context of chronic compression of the spinal cord by a CIM and the need for close monitoring of these patients.
August 15, 2017: Curēus
https://www.readbyqxmd.com/read/29054697/a-novel-method-for-oxygen-glucose-deprivation-model-in-organotypic-spinal-cord-slices
#13
Jing-Jie Liu, Xiao-Yan Ding, Li Xiang, Feng Zhao, Sheng-Li Huang
This study aimed to establish a model to closely mimic spinal cord hypoxic-ischemic injury with high production and high reproducibility. Fourteen-day cultured organotypic spinal cord slices were divided into 4 groups: control (Ctrl), oxygen glucose deprived for 30min (OGD 30min), OGD 60min, and OGD 120min. The Ctrl slices were incubated with 1ml propidium iodide (PI) solution (5μg/ml) for 30min. The OGD groups were incubated with 1ml glucose-free DMEM/F12 medium and 5μl PI solution (1mg/ml) for 30min, 60min and 120min, respectively...
October 17, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/29022855/association-of-left-subclavian-artery-coverage-without-revascularization-and-spinal-cord-ischemia-in-patients-undergoing-thoracic-endovascular-aortic-repair-a-vascular-quality-initiative%C3%A2-analysis
#14
Pedro Gr Teixeira, Karen Woo, Adam W Beck, Salvatore T Scali, Fred A Weaver
Objectives Investigate the impact of left subclavian artery coverage without revascularization on spinal cord ischemia development in patients undergoing thoracic endovascular aortic repair. Methods The Vascular Quality Initiative thoracic endovascular aortic repair module (April 2011-July 2014) was analyzed. Patients undergoing left subclavian artery coverage were divided into two groups according to revascularization status. The association between left subclavian artery revascularization with the primary outcome of spinal cord ischemia and the secondary outcome of stroke was assessed with multivariable analysis adjusting for between-group baseline differences...
January 1, 2017: Vascular
https://www.readbyqxmd.com/read/29019146/spinal-cord-injury-after-thoracic-endovascular-aortic-aneurysm-repair
#15
Hamdy Awad, Mohamed Ehab Ramadan, Hosam F El Sayed, Daniel A Tolpin, Esmerina Tili, Charles D Collard
PURPOSE: Thoracic endovascular aortic aneurysm repair (TEVAR) has become a mainstay of therapy for aneurysms and other disorders of the thoracic aorta. The purpose of this narrative review article is to summarize the current literature on the risk factors for and pathophysiology of spinal cord injury (SCI) following TEVAR, and to discuss various intraoperative monitoring and treatment strategies. SOURCE: The articles considered in this review were identified through PubMed using the following search terms: thoracic aortic aneurysm, TEVAR, paralysis+TEVAR, risk factors+TEVAR, spinal cord ischemia+TEVAR, neuromonitoring+thoracic aortic aneurysm, spinal drain, cerebrospinal fluid drainage, treatment of spinal cord ischemia...
December 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/29017806/implementation-of-a-bundled-protocol-significantly-reduces-risk-of-spinal-cord-ischemia-after-branched-or-fenestrated-endovascular-aortic-repair
#16
Salvatore T Scali, Moses Kim, Paul Kubilis, Robert J Feezor, Kristina A Giles, Brittney Miller, Javairiah Fatima, Thomas S Huber, Scott A Berceli, Martin Back, Adam W Beck
OBJECTIVE: Spinal cord ischemia (SCI) is a devastating complication after branched or fenestrated endovascular aortic repair (B/FEVAR) for thoracoabdominal aortic disease. The purpose of this analysis was to describe the impact of a bundled clinical care protocol designed to reduce the risk of SCI in this population of patients. METHODS: A bundled SCI prevention protocol including cerebrospinal fluid drainage, blood pressure parameters, transfusion goals, and pharmacologic adjuncts (steroids, naloxone) was initiated in May 2015...
October 7, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28993035/outcomes-of-hybrid-procedure-for-type-b-aortic-dissection-with-an-aberrant-right-subclavian-artery
#17
Huanyu Ding, Songyuan Luo, Yuan Liu, Wenhui Huang, Minchun Jiang, Jie Li, Nianjin Xie, Xiaoping Fan, Ruixin Fan, Jianfang Luo
OBJECTIVE: To report our single-center experience of the hybrid procedure for type B aortic dissection (TBAD) with an aberrant right subclavian artery (ARSA) and the early to midterm outcomes in these patients. METHODS: From December 2011 to February 2016, 16 patients (12 males; median age, 51 years; range, 40-66 years) underwent thoracic endovascular aortic repair and extraanatomic bypass hybrid procedure for TBAD with an ARSA in our center. Demographics, coexisting medical conditions, imaging features, operation details, and follow-up outcomes of these patients were collected retrospectively and analyzed...
October 6, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28981094/tat-protein-disulfide-isomerase-a3-a-possible-candidate-for-preventing-ischemic-damage-in-the-spinal-cord
#18
Dae Young Yoo, Su Bin Cho, Hyo Young Jung, Woosuk Kim, Goang-Min Choi, Moo-Ho Won, Dae Won Kim, In Koo Hwang, Soo Young Choi, Seung Myung Moon
In the present study, we searched for possible candidates that can prevent ischemic damage in the rabbit spinal cord. For this study, we used two-dimensional gel electrophoresis followed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, in sham- and ischemia-operated animals. As the level of protein disulfide-isomerase A3 (PDIA3) significantly decreased 3 h after ischemia/reperfusion, we further investigated its possible role against ischemic damage using an in vitro spinal cord cell line and in vivo spinal cord ischemic model...
October 5, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28981091/neuron-and-microglia-macrophage-derived-fgf10-activate-neuronal-fgfr2-pi3k-akt-signaling-and-inhibit-microglia-macrophages-tlr4-nf-%C3%AE%C2%BAb-dependent-neuroinflammation-to-improve-functional-recovery-after-spinal-cord-injury
#19
Jian Chen, Zhouguang Wang, ZengMing Zheng, Yu Chen, Sinan Khor, KeSi Shi, ZiLi He, Qingqing Wang, Yingzheng Zhao, Hongyu Zhang, Xiaokun Li, Jiawei Li, Jiayu Yin, Xiangyang Wang, Jian Xiao
Therapeutics used to treat central nervous system (CNS) injury were designed to repair neurites and inhibit cell apoptosis. Previous studies have shown that neuron-derived FGF10 exerts potential neuroprotective effects after cerebral ischemia injury. However, little is known about the role of endogenous FGF10 in the recovery process after spinal cord injury (SCI). In this study, we found that FGF10 is mainly produced by neuron and microglia/macrophages, and its expression is increased after SCI. Exogenous treatment of FGF10 improved functional recovery after injury by reducing apoptosis, as well as repairing neurites via FGFR2/PI3K/Akt pathway...
October 5, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28979699/autophagy-plays-a-protective-role-in-motor-neuron-degeneration-following-spinal-cord-ischemia-reperfusion-induced-spastic-paralysis
#20
Li Wang, Dongliang Feng, Yuan Liu, Sen Li, Long Jiang, Zaiyun Long, Yamin Wu
Spinal cord ischemia and reperfusion (SCIR) injury can lead to neurologic dysfunction and paraplegia, which are serious complications after shock or thoracoabdominal aortic surgery. Autophagy is a fundamental cellular process in eukaryotes, and homeostasis of autophagic activities in the cytoplasm is critical for the maintenance of neuronal function. To date, no studies have addressed the involvement of autophagy in the regulation of motor neurons in the ventral horn of the spinal cord area following SCIR-induced spastic paralysis or the underlying mechanisms of this process...
2017: American Journal of Translational Research
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