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Jang M, Han S, Cho H. Correspondence between development of cytotoxic edema and cerebrospinal fluid volume and flow in the third ventricle after ischemic stroke. J Stroke Cerebrovasc Dis 2023; 32:107200. [PMID: 37290155 DOI: 10.1016/j.jstrokecerebrovasdis.2023.107200] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 05/22/2023] [Accepted: 05/24/2023] [Indexed: 06/10/2023] Open
Abstract
OBJECTIVES The importance of monitoring cerebrospinal fluid for the development of edema in ischemic stroke has been emphasized; however, studies on the relationship between intraventricular cerebrospinal fluid behavior and edema through longitudinal observations and analysis are rare. This study aimed to investigate the correlation between the development of cytotoxic edema and cerebrospinal fluid volume and flow in the third ventricle after ischemic stroke. MATERIALS AND METHODS The ventricle and edema regions were obtained using apparent diffusion coefficients and T2 and subdivided into lateral/ventral 3rd ventricles and cytotoxic/vasogenic (or cyst) edema, respectively. In rat models of ischemic stroke, the volume and flow (via the pseudo-diffusion coefficient [D*]) of the ventricles and edema volumes were longitudinally monitored for up to 45 days after surgery. RESULTS The volume of cytotoxic edema increased in the hyperacute and acute phases, whereas the volume (r = -0.49) and median D* values (r = -0.48 in the anterior-posterior direction) of the ventral 3rd ventricle both decreased, showing negative correlations with the volume of cytotoxic edema. In contrast, the volume of vasogenic edema/cyst was positively correlated with the volume (r = 0.73) and median D* values (r = 0.78 in the anterior-posterior direction) of the lateral ventricle in the subacute and chronic phases. CONCLUSIONS This study showed that the evolution of cerebrospinal fluid volume and flow in the ventricles was associated with edema progression at different time points in the ischemic stroke brain. This provides an efficient framework for monitoring and quantifying the interplay between cerebrospinal fluid and edema.
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Affiliation(s)
- MinJung Jang
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Department of Radiology, Weill Cornell Medicine, New York, NY, USA
| | - SoHyun Han
- Research Equipment Operations Division, Korea Basic Science Institute, Cheongju 28119, South Korea
| | - HyungJoon Cho
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea.
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2
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Younis NS, Mohamed ME. Anethole Pretreatment Modulates Cerebral Ischemia/Reperfusion: The Role of JNK, p38, MMP-2 and MMP-9 Pathways. Pharmaceuticals (Basel) 2023; 16:ph16030442. [PMID: 36986541 PMCID: PMC10057436 DOI: 10.3390/ph16030442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 03/08/2023] [Accepted: 03/13/2023] [Indexed: 03/17/2023] Open
Abstract
Anethole (AN) is one of the major constituents of several plant oils, demonstrating plentiful pharmacological actions. Ischemic stroke is the main cause of morbidity and death worldwide, particularly since ischemic stroke therapeutic choices are inadequate and limited; thus, the development of new therapeutic options is indispensable. This study was planned to explore the preventive actions of AN in ameliorating cerebral ischemia/reperfusion-induced brain damage and BBB permeability leakage, as well as to explore anethole’s potential mechanisms of action. The proposed mechanisms included modulating JNK and p38 as well as MMP-2 and MMP-9 pathways. Sprague–Dawley male rats were randomly assigned into four groups: sham, middle cerebral artery occlusion (MCAO), AN125 + MCAO, and AN250 + MCAO. Animals in the third and fourth groups were pretreated with AN 125 or 250 mg/kg orally, respectively, for two weeks before performing middle cerebral artery occlusion (MCAO)-induced cerebral ischemic/reperfusion surgery. Animals that experienced cerebral ischemia/reperfusion exhibited amplified infarct volume, Evans blue intensity, brain water content, Fluoro-Jade B-positive cells, severe neurological deficits, and numerous histopathological alterations. MCAO animals exhibited elevated MMP-9 and MMP-2 gene expressions, enzyme activities, augmented JNK, and p38 phosphorylation. On the other hand, pretreatment with AN diminished the infarct volume, Evans blue dye intensity, brain water content, and Fluoro-Jade B-positive cells, improved the neurological score and enhanced histopathological examination. AN effectively lowered MMP-9 and MMP-2 gene expression and enzyme activities and diminished phosphorylated JNK, p38. AN decreased MDA content, amplified GSH/GSSG ratio, SOD, and CAT, decreased the serum and brain tissue homogenate inflammatory cytokines (TNF-α, IL-6, IL-1β), NF-κB, and deterred the apoptotic status. This study revealed the neuroprotective ability of AN against cerebral ischemia/reperfusion in rats. AN boosted blood–brain barrier integrity via modulating MMPs and diminished oxidative stress, inflammation, and apoptosis through the JNK/p38 pathway.
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Affiliation(s)
- Nancy S. Younis
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
- Zagazig University Hospitals, Zagazig University, Zagazig 44519, Egypt
- Correspondence:
| | - Maged E. Mohamed
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
- Department of Pharmacognosy, College of Pharmacy, Zagazig University, Zagazig 44519, Egypt
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3
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Singh AA, Kharwar A, Dandekar MP. A Review on Preclinical Models of Ischemic Stroke: Insights Into the Pathomechanisms and New Treatment Strategies. Curr Neuropharmacol 2022; 20:1667-1686. [PMID: 34493185 PMCID: PMC9881062 DOI: 10.2174/1570159x19666210907092928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 07/21/2021] [Accepted: 08/26/2021] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Stroke is a serious neurovascular problem and the leading cause of disability and death worldwide. The disrupted demand to supply ratio of blood and glucose during cerebral ischemia develops hypoxic shock, and subsequently necrotic neuronal death in the affected regions. Multiple causal factors like age, sex, race, genetics, diet, and lifestyle play an important role in the occurrence as well as progression of post-stroke deleterious events. These biological and environmental factors may be contributed to vasculature variable architecture and abnormal neuronal activity. Since recombinant tissue plasminogen activator is the only clinically effective clot bursting drug, there is a huge unmet medical need for newer therapies for the treatment of stroke. Innumerous therapeutic interventions have shown promise in the experimental models of stroke but failed to translate it into clinical counterparts. METHODS Original publications regarding pathophysiology, preclinical experimental models, new targets and therapies targeting ischemic stroke have been reviewed since the 1970s. RESULTS We highlighted the critical underlying pathophysiological mechanisms of cerebral stroke and preclinical stroke models. We discuss the strengths and caveats of widely used ischemic stroke models, and commented on the potential translational problems. We also describe the new emerging treatment strategies, including stem cell therapy, neurotrophic factors and gut microbiome-based therapy for the management of post-stroke consequences. CONCLUSION There are still many inter-linked pathophysiological alterations with regards to stroke, animal models need not necessarily mimic the same conditions of stroke pathology and newer targets and therapies are the need of the hour in stroke research.
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Affiliation(s)
- Aditya A. Singh
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Balanagar, TS 500037, India
| | - Akash Kharwar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Balanagar, TS 500037, India
| | - Manoj P. Dandekar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Balanagar, TS 500037, India,Address correspondence to this author at the Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Balanagar, TS 500037, India; Tel: +91-40-23074750; E-mail:
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4
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Dandekar MP, Yin X, Peng T, Devaraj S, Morales R, McPherson DD, Huang SL. Repetitive xenon treatment improves post-stroke sensorimotor and neuropsychiatric dysfunction. J Affect Disord 2022; 301:315-330. [PMID: 34990636 DOI: 10.1016/j.jad.2022.01.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 07/21/2021] [Accepted: 01/02/2022] [Indexed: 12/20/2022]
Abstract
Stroke is a life-changing event as stroke survivors experience changes in personality, emotions and mood. We investigated the effect of xenon gas encapsulated in liposomes on stroke-generated sensorimotor impairments, and anxiety- and depression-like phenotypes. Ischemic stroke was created by the intraluminal middle cerebral artery occlusion (MCAO) for 6 h followed by reperfusion in rats. Xenon-liposome (6 mg/kg, intravenous) treatment was given multiple times starting at 2 h post-ischemia through 6 h (5X), and once-daily for next 3 days. Rats underwent ischemic injury displayed sensorimotor deficits in the adhesive removal, vibrissae-evoked forelimb placement and rotarod tests. These animals also made lesser entries and spent less time on open arms of the elevated-plus maze and swam more in passive mode in the forced swimming test, indicating anxiety- and depression-like behaviors at 28- and 35-days post-injury, respectively. Repeated intravenous treatment with xenon-liposomes ameliorated these behavioral aberrations (p < 0.05). Gut microbiome analysis (16S ribosomal-RNA gene sequencing) showed a decrease in the Clostridium clusters XI, XIVa, XVIII and Lactobacillus bacterium, and increase of the Prevotella in the xenon-liposome group. No microbiota communities were majorly affected across the treatments. Moreover, xenon treatment group showed augmented plasma levels of IL-6 cytokines (∼5 fold) on day-35 post-ischemia, while no change was noticed in the IL-1β, IL-4, IL-10, IL-13 and MCP-1 levels. Our data highlights the safety, behavioral recovery and reversal of post-stroke brain injury following xenon-liposome treatment in an extended ischemic model. These results show the potential for this treatment strategy to be translated to patients with stroke.
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Affiliation(s)
- Manoj P Dandekar
- Department of Internal Medicine, Division of Cardiology, The University of Texas Health Science Center at Houston (UTHealth) McGovern Medical School, Houston, TX, USA; presently Manoj P. Dandekar is affiliated with Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
| | - Xing Yin
- Department of Internal Medicine, Division of Cardiology, The University of Texas Health Science Center at Houston (UTHealth) McGovern Medical School, Houston, TX, USA
| | - Tao Peng
- Department of Internal Medicine, Division of Cardiology, The University of Texas Health Science Center at Houston (UTHealth) McGovern Medical School, Houston, TX, USA
| | - Sridevi Devaraj
- Department of Pathology & Immunology, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, USA
| | - Rodrigo Morales
- Department of Neurology, The University of Texas Health Science Center at Houston (UTHealth) McGovern Medical School, Houston, TX, USA; CIBQA, Universidad Bernardo O'Higgins. Santiago, Chile
| | - David D McPherson
- Department of Internal Medicine, Division of Cardiology, The University of Texas Health Science Center at Houston (UTHealth) McGovern Medical School, Houston, TX, USA; Center for Clinical and Translational Sciences at The University of Texas Health Science Center at Houston, TX, USA
| | - Shao-Ling Huang
- Department of Internal Medicine, Division of Cardiology, The University of Texas Health Science Center at Houston (UTHealth) McGovern Medical School, Houston, TX, USA.
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Komatsu T, Ohta H, Motegi H, Hata J, Terawaki K, Koizumi M, Muta K, Okano HJ, Iguchi Y. A novel model of ischemia in rats with middle cerebral artery occlusion using a microcatheter and zirconia ball under fluoroscopy. Sci Rep 2021; 11:12806. [PMID: 34140618 PMCID: PMC8211726 DOI: 10.1038/s41598-021-92321-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 06/04/2021] [Indexed: 12/21/2022] Open
Abstract
The failure of neuroprotective treatment-related clinical trials may be partially caused by unestablished animal models. Existing animal models are less likely to provide occlusion confined to the middle cerebral artery (MCA), making transarterial intervention difficult. We aimed to develop a novel focal stroke model using a microcatheter and zirconium dioxide that is non-magnetic under fluoroscopic guidance, which can monitor MCA occlusion and can improve hemorrhagic complications. Using male Sprague Dawley rats (n = 10), a microcatheter was navigated from the caudal ventral artery to the left internal carotid artery using an X-ray fluoroscopy to establish local occlusion. All rat cerebral angiographies were successful. No rats had hemorrhagic complications. Eight (80%) rats underwent occlusion of the MCA bifurcation by zirconium dioxide. Accidentally, the left posterior cerebral artery was failure embolized in 2 rats (20%). The median operating time was 8 min. All rats of occlusion MCA revealed an incomplete hemiparesis on the right side with neurological deficit score ranging from 1 to 3 (median 1, interquartile range 1-3) at 24 h after the induction of ischemia. Moreover, 2% 2,3,5-triphenyl tetrazolium chloride staining showed that the median infarct volume (mm3) was 280 (interquartile range 267-333) 24 h after the left MCA bifurcation occlusion. We present a novel rat model for focal stroke using a microcatheter and zirconium dioxide which does not affect the MRI. The model is predictable which is well confined within the territory supplied by the MCA, and reproducibility of this model is 80%. Fluoroscopy was able to identify which the MCA occlusion and model success while creating the model. It permitted exclusion of animals with complications from the experiment.
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Affiliation(s)
- Teppei Komatsu
- Department of Neurology, The Jikei University School of Medicine, 3-25-8 Nishishimbashi, Minato-ku, Tokyo, 105-8461, Japan.
| | - Hiroki Ohta
- Division of Regenerative Medicine, Research Center for Medical Sciences, The Jikei University School of Medicine, Tokyo, Japan
| | - Haruhiko Motegi
- Department of Neurology, The Jikei University School of Medicine, 3-25-8 Nishishimbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Junichi Hata
- Division of Regenerative Medicine, Research Center for Medical Sciences, The Jikei University School of Medicine, Tokyo, Japan
| | - Koshiro Terawaki
- Department of Radiological Science, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - Makoto Koizumi
- Laboratory Animal Facilities, Research Center for Medical Sciences, The Jikei University School of Medicine, Tokyo, Japan
| | - Kanako Muta
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Hirotaka James Okano
- Division of Regenerative Medicine, Research Center for Medical Sciences, The Jikei University School of Medicine, Tokyo, Japan
| | - Yasuyuki Iguchi
- Department of Neurology, The Jikei University School of Medicine, 3-25-8 Nishishimbashi, Minato-ku, Tokyo, 105-8461, Japan
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Ito Y, Abumiya T, Komatsu T, Funaki R, Gekka M, Kurisu K, Sugiyama T, Kawabori M, Osanai T, Nakayama N, Kazumata K, Houkin K. Neuroprotective effects of combination therapy of regional cold perfusion and hemoglobin-based oxygen carrier administration on rat transient cerebral ischemia. Brain Res 2020; 1746:147012. [PMID: 32652148 DOI: 10.1016/j.brainres.2020.147012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 06/19/2020] [Accepted: 07/06/2020] [Indexed: 10/23/2022]
Abstract
Regional cold perfusion and hemoglobin-based oxygen carrier administration both exert neuroprotective effects against cerebral ischemia reperfusion injury. We herein investigated whether the combination of these two therapies leads to stronger neuroprotective effects. Combination therapy was performed with the regional perfusion of cold HemoAct, a core-shell structured hemoglobin-albumin cluster, in a rat transient middle cerebral artery occlusion model. The effects of combination therapy, the intra-arterial administration of 10 °C HemoAct (10H) initiated at the onset of reperfusion, were compared with those of monotherapies, the intra-arterial administration of 10 °C saline (10S) and 37 °C HemoAct (37H), and an untreated control under the condition of 2-hour ischemia/24-hour reperfusion. The durability of therapeutic effects and the therapeutic time window of combination therapy were assessed based on comparisons with the 10H and control groups. Significantly better neurological findings and smaller infarct volumes were observed in the three treated (10S, 37H, and 10H) groups than in the control group. Among the 3 treated groups, only the 10H group showed significant improvements over the control group in the other items examined, including cerebral blood flow reduction, brain edema, and protein extravasation. The significant therapeutic effects of combination therapy on neurological disabilities and infarct volumes were confirmed at least until 7 days after reperfusion. Furthermore, combination therapy ameliorated neurological disabilities and hemorrhagic transformation in rats subjected to 4- and 5-hour ischemia/24-hour reperfusion. Since therapeutic effects may be expected until at least 5 h of complete ischemia and reperfusion, this combination therapy is a promising neuroprotective strategy against severe ischemic stroke.
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Affiliation(s)
- Yasuhiro Ito
- Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Takeo Abumiya
- Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
| | - Teruyuki Komatsu
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, Tokyo, Japan
| | - Ryosuke Funaki
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, Tokyo, Japan
| | - Masayuki Gekka
- Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Kota Kurisu
- Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Taku Sugiyama
- Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Masahito Kawabori
- Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Toshiya Osanai
- Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Naoki Nakayama
- Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Ken Kazumata
- Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Kiyohiro Houkin
- Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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7
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Juenemann M, Braun T, Schleicher N, Yeniguen M, Schramm P, Gerriets T, Ritschel N, Bachmann G, Obert M, Schoenburg M, Kaps M, Tschernatsch M. Neuroprotective mechanisms of erythropoietin in a rat stroke model. Transl Neurosci 2020; 11:48-59. [PMID: 33312715 PMCID: PMC7702138 DOI: 10.1515/tnsci-2020-0008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 12/15/2019] [Accepted: 01/02/2020] [Indexed: 11/15/2022] Open
Abstract
Objective This study was designed to investigate the indirect neuroprotective properties of recombinant human erythropoietin (rhEPO) pretreatment in a rat model of transient middle cerebral artery occlusion (MCAO). Methods One hundred and ten male Wistar rats were randomly assigned to four groups receiving either 5,000 IU/kg rhEPO intravenously or saline 15 minutes prior to MCAO and bilateral craniectomy or sham craniectomy. Bilateral craniectomy aimed at elimination of the space-consuming effect of postischemic edema. Diagnostic workup included neurological examination, assessment of infarct size and cerebral edema by magnetic resonance imaging, wet–dry technique, and quantification of hemispheric and local cerebral blood flow (CBF) by flat-panel volumetric computed tomography. Results In the absence of craniectomy, EPO pretreatment led to a significant reduction in infarct volume (34.83 ± 9.84% vs. 25.28 ± 7.03%; p = 0.022) and midline shift (0.114 ± 0.023 cm vs. 0.083 ± 0.027 cm; p = 0.013). We observed a significant increase in regional CBF in cortical areas of the ischemic infarct (72.29 ± 24.00% vs. 105.53 ± 33.10%; p = 0.043) but not the whole hemispheres. Infarct size-independent parameters could not demonstrate a statistically significant reduction in cerebral edema with EPO treatment. Conclusions Single-dose pretreatment with rhEPO 5,000 IU/kg significantly reduces ischemic lesion volume and increases local CBF in penumbral areas of ischemia 24 h after transient MCAO in rats. Data suggest indirect neuroprotection from edema and the resultant pressure-reducing and blood flow-increasing effects mediated by EPO.
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Affiliation(s)
- Martin Juenemann
- Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany.,Heart & Brain Research Group, Justus-Liebig-University Giessen and Kerckhoff Clinic, Benekestrasse 2-8, 61231, Bad Nauheim, Germany
| | - Tobias Braun
- Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany.,Heart & Brain Research Group, Justus-Liebig-University Giessen and Kerckhoff Clinic, Benekestrasse 2-8, 61231, Bad Nauheim, Germany
| | - Nadine Schleicher
- Heart & Brain Research Group, Justus-Liebig-University Giessen and Kerckhoff Clinic, Benekestrasse 2-8, 61231, Bad Nauheim, Germany
| | - Mesut Yeniguen
- Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany.,Heart & Brain Research Group, Justus-Liebig-University Giessen and Kerckhoff Clinic, Benekestrasse 2-8, 61231, Bad Nauheim, Germany
| | - Patrick Schramm
- Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany.,Heart & Brain Research Group, Justus-Liebig-University Giessen and Kerckhoff Clinic, Benekestrasse 2-8, 61231, Bad Nauheim, Germany
| | - Tibo Gerriets
- Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany.,Heart & Brain Research Group, Justus-Liebig-University Giessen and Kerckhoff Clinic, Benekestrasse 2-8, 61231, Bad Nauheim, Germany.,Department of Neurology, Gesundheitszentrum Wetterau, Chaumontplatz 1, 61231, Bad Nauheim, Germany
| | - Nouha Ritschel
- Max-Planck-Institute for Heart and Lung Research, Ludwigstraße 43, 61231, Bad Nauheim, Germany
| | - Georg Bachmann
- Department of Radiology, Kerckhoff Clinic, 61231, Bad Nauheim, Germany
| | - Martin Obert
- Department of Radiology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany
| | - Markus Schoenburg
- Department of Cardiac Surgery, Kerckhoff Clinic, 61231, Bad Nauheim, Germany
| | - Manfred Kaps
- Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany
| | - Marlene Tschernatsch
- Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany.,Heart & Brain Research Group, Justus-Liebig-University Giessen and Kerckhoff Clinic, Benekestrasse 2-8, 61231, Bad Nauheim, Germany.,Department of Neurology, Gesundheitszentrum Wetterau, Chaumontplatz 1, 61231, Bad Nauheim, Germany
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8
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Duan JX, Zheng MG, Mu SH, Tian DS, Xu XZ, He ZD, Zhang J. Transcranial direct current stimulation treated by multilead brain reflex instrument accelerates neural functional recovery in a rat model of stroke. Int J Neurosci 2020; 131:571-579. [PMID: 32241216 DOI: 10.1080/00207454.2020.1750391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
PURPOSE Clinical research suggests that transcranial direct current stimulation (tDCS) at bilateral supraorbital foramen and inferior orbital rim and nose intersections may facilitate rehabilitation after stroke. However, the underlying neurobiological mechanisms of tDCS remain poorly understood, impeding its clinical application. Here, we investigated the effect of tDCS applied after stroke on neural cells. MATERIALS AND METHODS Middle cerebral arterial occlusion (MCAO) reperfusion was induced in rats. Animals with comparable infarcts were randomly divided into MCAO group and MCAO + tDCS group. Recovery of neurological function was assessed behaviorally by modified neurological severity score (mNSS). Ischemic tissue damage verified histologically by TTC and HE staining. Immunohistochemical staining, real-time qPCR, and western blot were applied to determine the changes of neural cells in ischemic brains. RESULTS The results reveal that tDCS treated by multilead brain reflex instrument can promote the recovery of neurological function, remarkably reduce cerebral infarct volume, promote brain tissue rehabilitation, and can effectively inhibit astrocytosis and enhance neuronal survival and synaptic function in ischemic brains. CONCULSIONS Our study suggests that tDCS treated by multilead brain reflex instrument could be prospectively developed into a clinical treatment modality.
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Affiliation(s)
- Jun-Xiu Duan
- School of Medicine, Shenzhen University, Shenzhen, China
| | - Mei-Ge Zheng
- Department of Orthopaedics, The Second Hospital of Anhui Medical University, Hefei, China
| | - Shu-Hua Mu
- Psychology & Social College, Shenzhen University, Shenzhen, China
| | - Da-Sheng Tian
- Department of Orthopaedics, The Second Hospital of Anhui Medical University, Hefei, China
| | - Xin-Zhong Xu
- Department of Orthopaedics, The Second Hospital of Anhui Medical University, Hefei, China
| | - Zhen-Dan He
- School of Medicine, Shenzhen University, Shenzhen, China
| | - Jian Zhang
- School of Medicine, Shenzhen University, Shenzhen, China
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9
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Lai TKY, Zhai D, Su P, Jiang A, Boychuk J, Liu F. The receptor-receptor interaction between mGluR1 receptor and NMDA receptor: a potential therapeutic target for protection against ischemic stroke. FASEB J 2019; 33:14423-14439. [DOI: 10.1096/fj.201900417r] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Terence K. Y. Lai
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Dongxu Zhai
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Ping Su
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Anlong Jiang
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Jay Boychuk
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Fang Liu
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
- Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
- Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
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10
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Microcirculatory Changes in Experimental Models of Stroke and CNS-Injury Induced Immunodepression. Int J Mol Sci 2019; 20:ijms20205184. [PMID: 31635068 PMCID: PMC6834192 DOI: 10.3390/ijms20205184] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/14/2019] [Accepted: 10/18/2019] [Indexed: 12/17/2022] Open
Abstract
Stroke is the second-leading cause of death globally and the leading cause of disability in adults. Medical complications after stroke, especially infections such as pneumonia, are the leading cause of death in stroke survivors. Systemic immunodepression is considered to contribute to increased susceptibility to infections after stroke. Different experimental models have contributed significantly to the current knowledge of stroke pathophysiology and its consequences. Each model causes different changes in the cerebral microcirculation and local inflammatory responses after ischemia. The vast majority of studies which focused on the peripheral immune response to stroke employed the middle cerebral artery occlusion method. We review various experimental stroke models with regard to microcirculatory changes and discuss the impact on local and peripheral immune response for studies of CNS-injury (central nervous system injury) induced immunodepression.
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Divani AA, Farr TD, Di Napoli M, Salazar P, SantaCruz KS, Jafarli A, Jafari M, Fisher M. Transfemoral Approach to Induce Transient Middle Cerebral Artery Occlusion in Rats: The Use of Commercially Available Endovascular Wires. Neurocrit Care 2019; 32:575-585. [PMID: 31346935 DOI: 10.1007/s12028-019-00791-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Animal models of stroke play a crucial role in determining the pathophysiology of stroke progression and assessment of any new therapeutic approaches. Transient middle cerebral artery occlusion (tMCAo) in rodent models are the most common site-specific type of ischemia because of their relevance to the clinical setting. Compared with the intraluminal filament technique for inducing tMCAo, the transfemoral approach using endovascular wires is relatively a new technique METHODS: Here we present the use of commercially available wires used for neuro-endovascular surgical procedures to induce tMCAo in rats via a transfemoral approach. We used male Wistar rats in four groups to assess the effect of occlusion time (1 vs. 2 hours) and the wire type (PT2 TM 0.014″ vs. TransendTM EX, 0.014″, Boston Scientific, MA, USA). Infarct volume, edema, neurological deficits, and pro-inflammatory/anti-inflammatory blood biomarkers were used as outcome measures. RESULTS We observed a significant effect of the wire type on the infarct volume (p value = 0.0096) where infarcts were slightly larger in the PT2 wiregroups. However, the occlusion time had no significant effect on infarct volume, even though the interaction between wire-type * occlusion-time was significant (p value = 0.024). Also, the amount of edema and blood pro-inflammatory/anti-inflammatory biomarkers were not statistically different among the wire-type and occlusion-time groups. CONCLUSIONS The choice of appropriate endovascular wire should probably be the focus of the study design instead of the occlusion time when planning an experiment. The transfemoral approach using endovascular wires for inducing tMCAo in rats provides a more consistent outcome with fewer complications compared with suture filament models.
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Affiliation(s)
- Afshin A Divani
- Department of Neurology, University of Minnesota, MMC 295, 420 Delaware Street S.E., Minneapolis, MN, 55455, USA. .,Department of Neurological Surgery, University of Minnesota, Minneapolis, MN, USA. .,Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, USA.
| | - Tracy D Farr
- Faculty of Medicine and Health Sciences, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Mario Di Napoli
- Department of Neurology, San Camillo de' Lellis District General Hospital, Rieti, Italy
| | | | - Karen S SantaCruz
- Department of Pathology, University of New Mexico, Albuquerque, NM, USA
| | - Alibay Jafarli
- Department of Neurology, University of Minnesota, MMC 295, 420 Delaware Street S.E., Minneapolis, MN, 55455, USA
| | - Mostafa Jafari
- Department of Neurology, University of Minnesota, MMC 295, 420 Delaware Street S.E., Minneapolis, MN, 55455, USA
| | - Marc Fisher
- Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
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12
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Liu J, Wu YY, Yu XL, Jia HY, Mao QY, Fang JQ. Temporal effect of acupuncture on amino acid neurotransmitters in rats with acute cerebral ischaemia. Acupunct Med 2019; 37:252-258. [PMID: 31342771 DOI: 10.1136/acupmed-2017-011417] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Acupuncture stimulation at GV26 during the acute phase of cerebral ischaemia can effectively reduce brain damage induced by ischaemic injury. However, the time course of the effects of acupuncture stimulation has not yet been thoroughly studied. OBJECTIVE To investigate the effects of manual acupuncture (MA) on glutamic acid (Glu) and γ-aminobutyric acid (GABA) expression in the cerebrospinal fluid of rats with middle cerebral artery occlusion (MCAO) and determine whether there is a temporal effect of acupuncture on the treatment of cerebral ischaemia. METHODS We performed thread occlusion of the right middle cerebral artery in rats to establish an animal model of MCAO. Simultaneously, during acupuncture treatment, microdialysis was used to continuously and dynamically observe immediate alterations in amino acid metabolism with acupuncture stimulation after cerebral ischaemia in vivo in this rat model of MCAO. RESULTS We found that, in comparison with an untreated MCAO group, Glu content was significantly decreased during the first acupuncture stimulation and during the course of the acupuncture treatment in the MCAO+MA group (MCAO vs MCAO+MA: day 1, P=0.032; day 2, P=0.021; day 3, P=0.017). These findings were also seen after the end of treatment when acupuncture was no longer applied (MCAO vs MCAO+MA: day 7, P=0.009). Measurements of GABA content following cerebral ischaemic injury showed that GABA peaks 24 hours after damage, falls thereafter and decreases to baseline levels on day 7. In the MCAO+MA group, GABA content on days 1 to day 2 was lower than in the MCAO group (MCAO+MA vs MCAO: day 1, P=0.003; day 2, P=0.001), although it was higher than in the control group (MCAO+MA vs control: day 1, P=0.024; day 2, P=0.009). GABA content on day 3 and day 7 was higher in the MCAO+MA group than in the MCAO group and the control group (MCAO+MA vs MCAO: day 3, P=0.008; day 7, P=0.013; MCAO+MA vs control: day 3, P=0.002; day 7, P=0.009). CONCLUSION Acupuncture stimulation at GV26 can effectively decrease excessive release of Glu induced by ischaemia and maintain the endogenous inhibitory activity of GABA. This phenomenon was seen during the entire course of acupuncture treatment and continued for some time after the end of acupuncture treatment.
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Affiliation(s)
- Jing Liu
- 1 The Third Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou, China.,2 The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yuan-Yuan Wu
- 1 The Third Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou, China.,2 The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xiao-Lei Yu
- 1 The Third Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou, China.,2 The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Hong-Yang Jia
- 1 The Third Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou, China.,2 The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Qun-Yan Mao
- 1 The Third Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou, China.,2 The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jian-Qiao Fang
- 1 The Third Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou, China.,2 The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
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13
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Makkiyah FA, Sadewo W. Technical report: Simple method of animal stroke model of luminal occlusion of middle cerebral artery in Indonesia. Surg Neurol Int 2019; 10:143. [PMID: 31528478 PMCID: PMC6744803 DOI: 10.25259/sni_62_2019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 06/10/2019] [Indexed: 12/02/2022] Open
Abstract
Background: Although there are many experimental studies describing the suture method of middle cerebral artery occlusion (MCAO) in rats, this is still a new procedure in Indonesia and the techniques for applying this stroke model in animal research are not well known. There has been a perception in Indonesian scientific community that the technique would be difficult and require advanced equipment. The aim of this study is to demonstrate that it is possible to perform the technique with minimal resources using simple method and basic surgical loupe equipment. Methods: A total of 30 male Wistar rats, aged 6 months, weighing 250 g–400 g Wistar rats, were obtained from the Bandung Biofarma Pasteur. Preliminary trials were performed to gain an understanding of the detailed anatomy of the animals and to master the techniques. An ×8 loupe magnification was used for all surgical steps in this study except taking of surgical operation photos. The procedures applied simple methods, using two loop temporary knots instead of any animal vascular clips. Results: After an extensive training period, two of the 30 rats died within 4 weeks after the procedure. The effects of MCAO were confirmed clinically and by hematoxylin-eosin staining pathology slides. Conclusion: With simple methods, this MCAO procedure could be implemented in developing countries such as Indonesia without the requirement for advanced equipment.
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Affiliation(s)
- Feda Anisah Makkiyah
- Department of Neurosurgery, School of Medicine, Universitas Pembangunan Nasional "Veteran" Jakarta, Indonesia
| | - Wismaji Sadewo
- Department of Neurosurgery, Cipto Mangunkusumo Hospital, School of Medicine, University of Indonesia, Jakarta, Indonesia
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14
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Choi CH, Yi KS, Lee SR, Lee Y, Jeon CY, Hwang J, Lee C, Choi SS, Lee HJ, Cha SH. A novel voxel-wise lesion segmentation technique on 3.0-T diffusion MRI of hyperacute focal cerebral ischemia at 1 h after permanent MCAO in rats. J Cereb Blood Flow Metab 2018; 38:1371-1383. [PMID: 28598225 PMCID: PMC6092770 DOI: 10.1177/0271678x17714179] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
To assess hyperacute focal cerebral ischemia in rats on 3.0-Tesla diffusion-weighted imaging (DWI), we developed a novel voxel-wise lesion segmentation technique that overcomes intra- and inter-subject variation in apparent diffusion coefficient (ADC) distribution. Our novel technique involves the following: (1) intensity normalization including determination of the optimal type of region of interest (ROI) and its intra- and inter-subject validation, (2) verification of focal cerebral ischemic lesions at 1 h with gross and high-magnification light microscopy of hematoxylin-eosin (H&E) pathology, (3) voxel-wise segmentation on ADC with various thresholds, and (4) calculation of dice indices (DIs) to compare focal cerebral ischemic lesions at 1 h defined by ADC and matching H&E pathology. The best coefficient of variation was the mode of the left hemisphere after normalization using whole left hemispheric ROI, which showed lower intra- (2.54 ± 0.72%) and inter-subject (2.67 ± 0.70%) values than the original. Focal ischemic lesion at 1 h after middle cerebral artery occlusion (MCAO) was confirmed on both gross and microscopic H&E pathology. The 83 relative threshold of normalized ADC showed the highest mean DI (DI = 0.820 ± 0.075). We could evaluate hyperacute ischemic lesions at 1 h more reliably on 3-Tesla DWI in rat brains.
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Affiliation(s)
- Chi-Hoon Choi
- 1 Department of Radiology, Chungbuk National University Hospital, Cheongju-si, Chungcheongbuk-do, Republic of Korea
| | - Kyung Sik Yi
- 1 Department of Radiology, Chungbuk National University Hospital, Cheongju-si, Chungcheongbuk-do, Republic of Korea
| | - Sang-Rae Lee
- 2 National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju-si, Chungcheongbuk-do, Republic of Korea
| | - Youngjeon Lee
- 2 National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju-si, Chungcheongbuk-do, Republic of Korea
| | - Chang-Yeop Jeon
- 2 National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju-si, Chungcheongbuk-do, Republic of Korea
| | - Jinwoo Hwang
- 3 Clinical Science, Philips Healthcare, Seoul, Republic of Korea
| | - Chulhyun Lee
- 4 Bioimaging Research Team, Korea Basic Science Institute, Cheongju-si, Chungcheongbuk-do, Republic of Korea
| | - Sung Sik Choi
- 5 Medical Research Institute, Chung-Ang University, Seoul, Republic of Korea
| | - Hong Jun Lee
- 5 Medical Research Institute, Chung-Ang University, Seoul, Republic of Korea
| | - Sang-Hoon Cha
- 1 Department of Radiology, Chungbuk National University Hospital, Cheongju-si, Chungcheongbuk-do, Republic of Korea.,6 College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju-si, Chungcheongbuk-do, Republic of Korea
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15
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Gubskiy IL, Namestnikova DD, Cherkashova EA, Chekhonin VP, Baklaushev VP, Gubsky LV, Yarygin KN. MRI Guiding of the Middle Cerebral Artery Occlusion in Rats Aimed to Improve Stroke Modeling. Transl Stroke Res 2018; 9:417-425. [PMID: 29178027 PMCID: PMC6061245 DOI: 10.1007/s12975-017-0590-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/11/2017] [Accepted: 11/17/2017] [Indexed: 01/30/2023]
Abstract
The middle cerebral artery occlusion (MCAO) model in rats closely imitates ischemic stroke and is widely used. Existing instrumental methods provide a certain level of MCAO guidance, but monitoring of the MCA-occluding intraluminal filament position and possible complications can be improved. The goal of this study was to develop a MRI-based method of simultaneous control of the filament position, blood flow in the intracranial vessels, and hemorrhagic complications. Rats were subjected to either MRI-guided MCAO (group 1, n = 51) or MCAO without MRI control (group 2, n = 38). After operation, group 1 rats were transferred into a MRI scanner for the control of the filament position and possible complications. Ninety minutes after the onset of MCAO, the filament was removed in rats of both groups and MRI control of the infarct volume and hemorrhagic complications performed. High-resolution T1- and T2-weighted imaging performed immediately after filament insertion provided visualization of the filament position, blood flow in brain arteries, and complications related to inappropriate filament insertion. It permitted replacement of wrongly positioned filaments and exclusion of animals with complications from the experiment. MRI-based MCAO guiding provided real-time intra-operational monitoring of crucial parameters determining MCAO suitability for stroke modeling, including better assessment of the operation outcomes in individual animals and significant enhancement of the model success rate. The possibility of simultaneous visualization of the filament, blood flow in the arteries, brain tissue, and hemorrhagic complications is the principal advantage of the proposed method over other instrumental methods of MCAO quality control. Graphical Abstract MRI-guided middle cerebral artery occlusion technique permits intra-operational monitoring via direct non-invasive simultaneous visualization of the filament, blood flow in the arteries, brain tissue, and hemorrhagic complications. It provides better assessment of MCAO outcomes in individual animals and significant enhancement of MCAO success rate.
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Affiliation(s)
- Ilya L Gubskiy
- Research Institute of Cerebrovascular Pathology and Stroke, Pirogov Russian National Research Medical University, Moscow, Russia.
| | - Daria D Namestnikova
- Department of Neurology, Neurosurgery and Medical Genetics, Pirogov Russian National Research Medical University, Moscow, Russia
| | - Elvira A Cherkashova
- Department of Neurology, Neurosurgery and Medical Genetics, Pirogov Russian National Research Medical University, Moscow, Russia
| | - Vladimir P Chekhonin
- Serbsky Federal Medical Research Centre of Psychiatry and Narcology, Pirogov Russian National Research Medical University, Moscow, Russia
| | - Vladimir P Baklaushev
- Federal Research Clinical Center of Specialized Medical Care and Medical Technologies of the FMBA of Russia, Moscow, Russia
| | - Leonid V Gubsky
- Research Institute of Cerebrovascular Pathology and Stroke, Pirogov Russian National Research Medical University, Moscow, Russia
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16
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Korobtsov AV, Kalinichenko SG. [The experimental strategies in the study of ischemic stroke]. Zh Nevrol Psikhiatr Im S S Korsakova 2018; 117:38-44. [PMID: 29411744 DOI: 10.17116/jnevro201711712238-44] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Literature data and own experience in the studies of experimental stroke methodology are reviewed. Advantages and disadvantages of the common models of focal ischemia used in the laboratory practice are discussed in details. The advantages of the filament occlusion of the middle cerebral artery in rats as the most adequate model of human stroke are substantiated. The authors suggest a modification of this variant using an additional coagulation of the pterygopalatine artery that allows the exclusion of the retrograde and collateral blood flow into the inner carotid artery after ligation of the common and external carotid arteries.
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Affiliation(s)
- A V Korobtsov
- Pacific State Medical University, Vladivostok, Russia
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17
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Percie du Sert N, Alfieri A, Allan SM, Carswell HV, Deuchar GA, Farr TD, Flecknell P, Gallagher L, Gibson CL, Haley MJ, Macleod MR, McColl BW, McCabe C, Morancho A, Moon LD, O'Neill MJ, Pérez de Puig I, Planas A, Ragan CI, Rosell A, Roy LA, Ryder KO, Simats A, Sena ES, Sutherland BA, Tricklebank MD, Trueman RC, Whitfield L, Wong R, Macrae IM. The IMPROVE Guidelines (Ischaemia Models: Procedural Refinements Of in Vivo Experiments). J Cereb Blood Flow Metab 2017; 37:3488-3517. [PMID: 28797196 PMCID: PMC5669349 DOI: 10.1177/0271678x17709185] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Most in vivo models of ischaemic stroke target the middle cerebral artery and a spectrum of stroke severities, from mild to substantial, can be achieved. This review describes opportunities to improve the in vivo modelling of ischaemic stroke and animal welfare. It provides a number of recommendations to minimise the level of severity in the most common rodent models of middle cerebral artery occlusion, while sustaining or improving the scientific outcomes. The recommendations cover basic requirements pre-surgery, selecting the most appropriate anaesthetic and analgesic regimen, as well as intraoperative and post-operative care. The aim is to provide support for researchers and animal care staff to refine their procedures and practices, and implement small incremental changes to improve the welfare of the animals used and to answer the scientific question under investigation. All recommendations are recapitulated in a summary poster (see supplementary information).
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Affiliation(s)
- Nathalie Percie du Sert
- 1 National Centre for the Replacement, Refinement and Reduction of Animals in Research (NC3Rs), London, UK
| | - Alessio Alfieri
- 2 The Roslin Institute and R(D)SVS, University of Edinburgh, Easter Bush, Midlothian, UK
| | - Stuart M Allan
- 3 Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Hilary Vo Carswell
- 4 Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), University of Strathclyde, Glasgow, UK
| | - Graeme A Deuchar
- 5 Institute of Neuroscience and Psychology, College of Medical, Veterinary and Life Sciences, University of Glasgow/Arum Biosciences, Glasgow, UK
| | - Tracy D Farr
- 6 School of Life Sciences, University of Nottingham Medical School, Nottingham, UK
| | | | - Lindsay Gallagher
- 5 Institute of Neuroscience and Psychology, College of Medical, Veterinary and Life Sciences, University of Glasgow/Arum Biosciences, Glasgow, UK
| | - Claire L Gibson
- 8 Department of Neuroscience, Psychology and Behaviour, University of Leicester, Leicester, UK
| | - Michael J Haley
- 3 Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Malcolm R Macleod
- 9 Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Barry W McColl
- 2 The Roslin Institute and R(D)SVS, University of Edinburgh, Easter Bush, Midlothian, UK
| | - Christopher McCabe
- 5 Institute of Neuroscience and Psychology, College of Medical, Veterinary and Life Sciences, University of Glasgow/Arum Biosciences, Glasgow, UK
| | - Anna Morancho
- 10 Neurovascular Research Laboratory. Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona; Barcelona, Spain
| | - Lawrence Df Moon
- 11 Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | | | - Isabel Pérez de Puig
- 13 Institut d'Investigacions Biomèdiques de Barcelona (IIBB), Consejo Superior de Investigaciones Científicas (CSIC), IDIBAPS, Barcelona, Spain
| | - Anna Planas
- 13 Institut d'Investigacions Biomèdiques de Barcelona (IIBB), Consejo Superior de Investigaciones Científicas (CSIC), IDIBAPS, Barcelona, Spain
| | | | - Anna Rosell
- 10 Neurovascular Research Laboratory. Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona; Barcelona, Spain
| | - Lisa A Roy
- 5 Institute of Neuroscience and Psychology, College of Medical, Veterinary and Life Sciences, University of Glasgow/Arum Biosciences, Glasgow, UK
| | | | - Alba Simats
- 10 Neurovascular Research Laboratory. Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona; Barcelona, Spain
| | - Emily S Sena
- 9 Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Brad A Sutherland
- 16 Acute Stroke Programme, Radcliffe Department of Medicine, University of Oxford, Oxford, UK.,17 School of Medicine, Faculty of Health, University of Tasmania, Hobart, Australia
| | - Mark D Tricklebank
- 18 Centre for Neuroimaging Sciences, Institute of Psychiatry Psychology and Neuroscience, King's College London, London, UK
| | - Rebecca C Trueman
- 6 School of Life Sciences, University of Nottingham Medical School, Nottingham, UK
| | | | - Raymond Wong
- 3 Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - I Mhairi Macrae
- 5 Institute of Neuroscience and Psychology, College of Medical, Veterinary and Life Sciences, University of Glasgow/Arum Biosciences, Glasgow, UK
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18
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A general protocol of ultra-high resolution MR angiography to image the cerebro-vasculature in 6 different rats strains at high field. J Neurosci Methods 2017; 289:75-84. [PMID: 28694213 DOI: 10.1016/j.jneumeth.2017.07.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 07/06/2017] [Accepted: 07/06/2017] [Indexed: 11/23/2022]
Abstract
BACKGROUND Differences in the cerebro-vasculature among strains as well as individual animals might explain variability in animal models and thus, a non-invasive method tailored to image cerebral vessel of interest with high signal to noise ratio is required. NEW METHOD Experimentally, we describe a new general protocol of three-dimensional time-of-flight magnetic resonance angiography to visualize non-invasively the cerebral vasculature in 6 different rat strains. Flow compensated angiograms of Sprague Dawley, Wistar Kyoto, Lister Hooded, Long Evans, Fisher 344 and Spontaneous Hypertensive Rat strains were obtained without the use of contrast agents. At 11.7T using a repetition time of 60ms, an isotropic resolution of up to 62μm was achieved; total imaging time was 98min for a 3D data set. RESULTS The visualization of the cerebral arteries was improved by removing extra-cranial vessels prior to the calculation of maximum intensity projection to obtain the angiograms. Ultimately, we demonstrate that the newly implemented method is also suitable to obtain angiograms following middle cerebral artery occlusion, despite the presence of intense vasogenic edema 24h after reperfusion. COMPARISON WITH EXISTING METHODS The careful selection of the excitation profile and repetition time at a higher static magnetic field allowed an increase in spatial resolution to reliably detect of the hypothalamic artery, the anterior choroidal artery as well as arterial branches of the peri-amygdoidal complex and the optical nerve in six different rat strains. CONCLUSIONS MR angiography without contrast agent can be utilized to study cerebro-vascular abnormalities in various animal models.
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19
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Malinova V, Psychogios MN, Tsogkas I, Koennecke B, Bleuel K, Iliev B, Rohde V, Mielke D. MR-angiography allows defining severity grades of cerebral vasospasm in an experimental double blood injection subarachnoid hemorrhage model in rats. PLoS One 2017; 12:e0171121. [PMID: 28182715 PMCID: PMC5300130 DOI: 10.1371/journal.pone.0171121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 01/16/2017] [Indexed: 12/27/2022] Open
Abstract
Objective Magnetic resonance (MR) imaging has been used for the detection of cerebral vasospasm (VSP) related infarction in experimental subarachnoid hemorrhage (eSAH) in rats. Conventional angiography is generally used to visualize VSP, which is an invasive technique with a possible increase in morbidity and mortality. In this study we evaluated the validity of MR-angiography (MRA) in detecting VSP and its feasibility to define VSP severity grades after eSAH in rats. Methods SAH was induced using the double-hemorrhage model in 12 rats. In two rats, saline solution was injected instead of blood (sham group). MR was performed on day 1, 2 and on day 5. T1-, T2-, T2*-weighted and time-of-flight MR sequences were applied, which were analyzed by two blinded neuroradiologists. Vessel narrowing of 25–50% was defined as mild, 50–75% as moderate and >75% as severe VSP. Results We performed a total of 34 MRAs in 14 rats. In 14 rats, MRA was performed on day 2 and day 5. In six rats MRA was additionally performed on day1 before the blood injection. A good visualization of cerebral vessels was possible in all cases. No VSP was seen in the sham group neither on day 2 nor on day 5. We found vasospasm on day 2 in 7 of the 14 rats (50%) whereas all 7 rats had mild and one rat had additionally moderate and severe vasospasm in one vessel, respectively. On day 5 we found vasospasm in 8 of the 14 rats (60%) whereas 4 rats had severe vasospasm, 1 rat had moderate vasospasm and 3 rats demonstrated mild vasospasm. In 4 of the 14 rats (30%) an ischemic lesion was detected on day 5. Three of these rats had severe vasospasm and one rat had mild vasospasm. Severe vasospasm on day 5 was statistically significant correlated with the occurrence of ischemic lesions (Fisher’s Exact test, OR 19.5, p = 0.03). Conclusions MRA is a noninvasive diagnostic tool, which allows a good visualization of the cerebral vasculature and provides reproducible results concerning the detection of VSP and the differentiation into three severity grades in rats. Future studies are needed to directly compare MRA with conventional angiography.
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Affiliation(s)
- Vesna Malinova
- Department of Neurosurgery, Georg August University Göttingen, Germany
- * E-mail:
| | | | - Ioannis Tsogkas
- Department of Neuroradiology, Georg August University Göttingen, Germany
| | - Birte Koennecke
- Department of Neurology, Georg August University Göttingen, Germany
| | - Kim Bleuel
- Department of Neurosurgery, Georg August University Göttingen, Germany
| | - Bogdan Iliev
- Department of Neurosurgery, Georg August University Göttingen, Germany
| | - Veit Rohde
- Department of Neurosurgery, Georg August University Göttingen, Germany
| | - Dorothee Mielke
- Department of Neurosurgery, Georg August University Göttingen, Germany
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20
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Sommer CJ. Ischemic stroke: experimental models and reality. Acta Neuropathol 2017; 133:245-261. [PMID: 28064357 PMCID: PMC5250659 DOI: 10.1007/s00401-017-1667-0] [Citation(s) in RCA: 344] [Impact Index Per Article: 49.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 12/31/2016] [Accepted: 01/01/2017] [Indexed: 12/11/2022]
Abstract
The vast majority of cerebral stroke cases are caused by transient or permanent occlusion of a cerebral blood vessel (“ischemic stroke”) eventually leading to brain infarction. The final infarct size and the neurological outcome depend on a multitude of factors such as the duration and severity of ischemia, the existence of collateral systems and an adequate systemic blood pressure, etiology and localization of the infarct, but also on age, sex, comorbidities with the respective multimedication and genetic background. Thus, ischemic stroke is a highly complex and heterogeneous disorder. It is immediately obvious that experimental models of stroke can cover only individual specific aspects of this multifaceted disease. A basic understanding of the principal molecular pathways induced by ischemia-like conditions comes already from in vitro studies. One of the most frequently used in vivo models in stroke research is the endovascular suture or filament model in rodents with occlusion of the middle cerebral artery (MCA), which causes reproducible infarcts in the MCA territory. It does not require craniectomy and allows reperfusion by withdrawal of the occluding filament. Although promptly restored blood flow is far from the pathophysiology of spontaneous human stroke, it more closely mimics the therapeutic situation of mechanical thrombectomy which is expected to be increasingly applied to stroke patients. Direct transient or permanent occlusion of cerebral arteries represents an alternative approach but requires craniectomy. Application of endothelin-1, a potent vasoconstrictor, allows induction of transient focal ischemia in nearly any brain region and is frequently used to model lacunar stroke. Circumscribed and highly reproducible cortical lesions are characteristic of photothrombotic stroke where infarcts are induced by photoactivation of a systemically given dye through the intact skull. The major shortcoming of this model is near complete lack of a penumbra. The two models mimicking human stroke most closely are various embolic stroke models and spontaneous stroke models. Closeness to reality has its price and goes along with higher variability of infarct size and location as well as unpredictable stroke onset in spontaneous models versus unpredictable reperfusion in embolic clot models.
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Affiliation(s)
- Clemens J Sommer
- Institute of Neuropathology, University Medical Center of the Johannes Gutenberg-University Mainz; Focus Program Translational Neuroscience (FTN) and Rhine Main Neuroscience Network (rmn2), Langenbeckstrasse 1, 55131, Mainz, Germany.
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21
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Hernandez A, Donovan V, Grinberg YY, Obenaus A, Carson MJ. Differential detection of impact site versus rotational site injury by magnetic resonance imaging and microglial morphology in an unrestrained mild closed head injury model. J Neurochem 2016; 136 Suppl 1:18-28. [PMID: 26806371 PMCID: PMC5047732 DOI: 10.1111/jnc.13402] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 10/05/2015] [Accepted: 10/06/2015] [Indexed: 01/31/2023]
Abstract
Seventy‐five percent of all traumatic brain injuries are mild and do not cause readily visible abnormalities on routine medical imaging making it difficult to predict which individuals will develop unwanted clinical sequelae. Microglia are brain‐resident macrophages and early responders to brain insults. Their activation is associated with changes in morphology or expression of phenotypic markers including P2Y12 and major histocompatibility complex class II. Using a murine model of unrestrained mild closed head injury (mCHI), we used microglia as reporters of acute brain injury at sites of impact versus sites experiencing rotational stress 24 h post‐mCHI. Consistent with mild injury, a modest 20% reduction in P2Y12 expression was detected by quantitative real‐time PCR (qPCR) analysis but only in the impacted region of the cortex. Furthermore, neither an influx of blood‐derived immune cells nor changes in microglial expression of CD45, TREM1, TREM2, major histocompatibility complex class II or CD40 were detected. Using magnetic resonance imaging (MRI), small reductions in T2 weighted values were observed but only near the area of impact and without overt tissue damage (blood deposition, edema). Microglial morphology was quantified without cryosectioning artifacts using ScaleA2 clarified brains from CX3CR1‐green fluorescence protein (GFP) mice. The cortex rostral to the mCHI impact site receives greater rotational stress but neither MRI nor molecular markers of microglial activation showed significant changes from shams in this region. However, microglia in this rostral region did display signs of morphologic activation equivalent to that observed in severe CHI. Thus, mCHI‐triggered rotational stress is sufficient to cause injuries undetectable by routine MRI that could result in altered microglial surveillance of brain homeostasis.
Acute changes in microglial morphology reveal brain responses to unrestrained mild traumatic brain injury
In areas subjected to rotational stress distant from impact site In the absence of detectable changes in standard molecular indicators of brain damage, inflammation or microglial activation. That might result in decreased surveillance of brain function and increased susceptibility to subsequent brain insults.
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Affiliation(s)
- Alfredo Hernandez
- Center for Glial-Neuronal Interactions, University of California Riverside, School of Medicine, Riverside, California, USA.,MarcU Program, University of California Riverside, Riverside, California, USA.,Division of Biomedical Sciences, University of California Riverside, School of Medicine, Riverside, California, USA
| | - Virgina Donovan
- Center for Glial-Neuronal Interactions, University of California Riverside, School of Medicine, Riverside, California, USA.,Division of Biomedical Sciences, University of California Riverside, School of Medicine, Riverside, California, USA.,Cell Molecular and Developmental Biology Program, University of California Riverside, Riverside, California, USA.,Loma Linda University School of Medicine, Loma Linda California, Loma Linda, CA, USA
| | - Yelena Y Grinberg
- Center for Glial-Neuronal Interactions, University of California Riverside, School of Medicine, Riverside, California, USA.,Division of Biomedical Sciences, University of California Riverside, School of Medicine, Riverside, California, USA
| | - Andre Obenaus
- Center for Glial-Neuronal Interactions, University of California Riverside, School of Medicine, Riverside, California, USA.,Cell Molecular and Developmental Biology Program, University of California Riverside, Riverside, California, USA.,Loma Linda University School of Medicine, Loma Linda California, Loma Linda, CA, USA
| | - Monica J Carson
- Center for Glial-Neuronal Interactions, University of California Riverside, School of Medicine, Riverside, California, USA.,Division of Biomedical Sciences, University of California Riverside, School of Medicine, Riverside, California, USA.,Cell Molecular and Developmental Biology Program, University of California Riverside, Riverside, California, USA
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Spatiotemporal characterization of brain infarction by sequential multimodal MR imaging following transient focal ischemia in a Rat model of intra-arterial middle cerebral artery occlusion. Eur Radiol 2016; 26:4505-4514. [DOI: 10.1007/s00330-016-4290-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 02/15/2016] [Accepted: 02/17/2016] [Indexed: 10/22/2022]
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23
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Braun R, Klein R, Walter HL, Ohren M, Freudenmacher L, Getachew K, Ladwig A, Luelling J, Neumaier B, Endepols H, Graf R, Hoehn M, Fink GR, Schroeter M, Rueger MA. Transcranial direct current stimulation accelerates recovery of function, induces neurogenesis and recruits oligodendrocyte precursors in a rat model of stroke. Exp Neurol 2016; 279:127-136. [PMID: 26923911 DOI: 10.1016/j.expneurol.2016.02.018] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 02/22/2016] [Accepted: 02/24/2016] [Indexed: 12/17/2022]
Abstract
BACKGROUND Clinical data suggest that transcranial direct current stimulation (tDCS) may be used to facilitate rehabilitation after stroke. However, data are inconsistent and the neurobiological mechanisms underlying tDCS remain poorly explored, impeding its implementation into clinical routine. In the healthy rat brain, tDCS affects neural stem cells (NSC) and microglia. We here investigated whether tDCS applied after stroke also beneficially affects these cells, which are known to be involved in regeneration and repair. METHODS Focal cerebral ischemia was induced in rats by transient occlusion of the middle cerebral artery. Twenty-eight animals with comparable infarcts, as judged by magnetic resonance imaging, were randomized to receive a multi-session paradigm of either cathodal, anodal, or sham tDCS. Behaviorally, recovery of motor function was assessed by Catwalk. Proliferation in the NSC niches was monitored by Positron-Emission-Tomography (PET) employing the radiotracer 3'-deoxy-3'-[(18)F]fluoro-l-thymidine ([(18)F]FLT). Microglia activation was depicted with [(11)C]PK11195-PET. In addition, immunohistochemical analyses were used to quantify neuroblasts, oligodendrocyte precursors, and activation and polarization of microglia. RESULTS Anodal and cathodal tDCS both accelerated functional recovery, though affecting different aspects of motor function. Likewise, tDCS induced neurogenesis independently of polarity, while only cathodal tDCS recruited oligodendrocyte precursors towards the lesion. Moreover, cathodal stimulation preferably supported M1-polarization of microglia. CONCLUSIONS TDCS acts through multifaceted mechanisms that far exceed its primary neurophysiological effects, encompassing proliferation and migration of stem cells, their neuronal differentiation, and modulation of microglia responses.
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Affiliation(s)
- Ramona Braun
- Department of Neurology, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany; Max Planck Institute for Metabolism Research, Gleueler Str. 50, 50931 Cologne, Germany
| | - Rebecca Klein
- Department of Neurology, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany
| | - Helene Luise Walter
- Department of Neurology, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany
| | - Maurice Ohren
- Department of Neurology, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany
| | - Lars Freudenmacher
- Department of Neurology, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany
| | - Kaleab Getachew
- Department of Neurology, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany
| | - Anne Ladwig
- Department of Neurology, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany; Max Planck Institute for Metabolism Research, Gleueler Str. 50, 50931 Cologne, Germany
| | - Joachim Luelling
- Department of Neurology, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany
| | - Bernd Neumaier
- Department of Nuclear Medicine, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany; Max Planck Institute for Metabolism Research, Gleueler Str. 50, 50931 Cologne, Germany
| | - Heike Endepols
- Department of Nuclear Medicine, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany
| | - Rudolf Graf
- Max Planck Institute for Metabolism Research, Gleueler Str. 50, 50931 Cologne, Germany
| | - Mathias Hoehn
- Max Planck Institute for Metabolism Research, Gleueler Str. 50, 50931 Cologne, Germany
| | - Gereon Rudolf Fink
- Department of Neurology, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany; Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Juelich, 52425 Juelich, Germany
| | - Michael Schroeter
- Department of Neurology, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany; Max Planck Institute for Metabolism Research, Gleueler Str. 50, 50931 Cologne, Germany; Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Juelich, 52425 Juelich, Germany
| | - Maria Adele Rueger
- Department of Neurology, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany; Max Planck Institute for Metabolism Research, Gleueler Str. 50, 50931 Cologne, Germany; Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Juelich, 52425 Juelich, Germany.
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Zuo XL, Deng HL, Wu P, Xu E. Do different reperfusion methods affect the outcomes of stroke induced by MCAO in adult rats? Int J Neurosci 2015; 126:850-5. [PMID: 26268737 DOI: 10.3109/00207454.2015.1074903] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
There are two patterns of ischemia/reperfusion (I/R) models used in rat middle cerebral artery occlusion (MCAO) I/R models, which differ in the use of unilateral or bilateral carotid artery reperfusion. The primary difference between the two patterns of I/R models is the complexity of the surgery procedure. However, researchers in this field have no idea whether there are any differences in outcomes of these two methods. In this study, we investigated the effects of the two methods on neurological deficits, infarct volume, blood-brain barrier (BBB) integrity and brain derived neurotrophic factor (BDNF) expression. Through evaluating the current way of bilateral common carotid artery reperfusion, we tried to find whether it could be replaced by an easier way. We found that there were no statistical significant differences between the different methods in infarct volume, neurological deficits, BBB integrity, and the level of BDNF (P > 0.05). These data demonstrated that different methods did not affect the neurological deficits, infarct volume, BBB integrity, and the BDNF protein level, which provides reference when we use an experimental stroke. These results suggest that the two methods have similar capability for inducing cerebral I/R injury and can be interchanged.
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Affiliation(s)
- Xia-Lin Zuo
- a 1 Institute of Neurosciences and the Second Affiliated Hospital , Guangzhou Medical University , Guangzhou , P.R. China
| | - Hou-Liang Deng
- b 2 Center for Drug Research and Development, zhujiang Hospital , Southern Medical University , Guangzhou , P.R. China
| | - Ping Wu
- b 2 Center for Drug Research and Development, zhujiang Hospital , Southern Medical University , Guangzhou , P.R. China
| | - En Xu
- a 1 Institute of Neurosciences and the Second Affiliated Hospital , Guangzhou Medical University , Guangzhou , P.R. China
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25
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Chen JC. The effects of acupuncture and traditional Chinese medicines on apoptosis of brain tissue in a rat intracerebral hemorrhage model. Physiol Behav 2015; 151:421-5. [PMID: 26238027 DOI: 10.1016/j.physbeh.2015.07.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 07/28/2015] [Accepted: 07/29/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVE This study aimed to evaluate the effects of Chinese herbs and acupuncture on the neuronal apoptosis and the expression of apoptosis-related genes in the brain tissue of rats following intracerebral hemorrhage (ICH). METHODS Collagenase VII was injected into the caudate nucleus of Sprague-Dawley rats to induce ICH. Chinese herbs (musk, borneol and tetrandrine) were intragastrically administered, and acupuncture was performed using Dazhui, Fengfu and Shuigou acupoints. Each group was further subdivided into 4 subgroups based on treatment duration (6-hour, 24-hour, 72-hour, and 1-week). Neurological impairment score, TUNEL assay and apoptotic markers, BCL-2, BAX, and caspase-3 were used to evaluate the apoptosis status after ICH and subsequent treatment. RESULTS Chinese herbal therapy and acupuncture improved neurological impairment compared with no therapy and sham-operated animals. Significant differences in TUNEL positive cells were found between treatment groups (p < 0.001) and over time (p < 0.001). Differential expression of BCL-2, BAX, and caspase-3 was observed between treatment groups (p = 0.014 for BAX and < 0.05 for BCL-2 and caspase-3) and treatment duration groups (p = 0.006 for BAX and < 0.05 BCL-2 and caspase-3). CONCLUSIONS Results indicate that Chinese herbs and acupuncture may improve neural impairment and reduce apoptosis, although there was no difference between therapies in a rat model of ICH. Additional experiments are needed to further clarify the role of these therapies following ICH.
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Affiliation(s)
- Jui-Chu Chen
- Department of Food and Beverage Management, Jen-Teh College of Medicine, Nursing & Management, Hou-loung Town, Miaoli County, Taiwan, ROC.
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Chronic cerebral hypoperfusion induces vascular plasticity and hemodynamics but also neuronal degeneration and cognitive impairment. J Cereb Blood Flow Metab 2015; 35:1249-59. [PMID: 25853908 PMCID: PMC4528009 DOI: 10.1038/jcbfm.2015.55] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Revised: 02/19/2015] [Accepted: 03/10/2015] [Indexed: 12/16/2022]
Abstract
Chronic cerebral hypoperfusion (CCH) induces cognitive impairment, but the compensative mechanism of cerebral blood flow (CBF) is not fully understood. The present study mainly investigated dynamic changes in CBF, angiogenesis, and cellular pathology in the cortex, the striatum, and the cerebellum, and also studied cognitive impairment of rats induced by bilateral common carotid artery occlusion (BCCAO). Magnetic resonance imaging (MRI) techniques, immunochemistry, and Morris water maze were employed to the study. The CBF of the cortex, striatum, and cerebellum dramatically decreased after right common carotid artery occlusion (RCCAO), and remained lower level at 2 weeks after BCCAO. It returned to the sham level from 3 to 6 weeks companied by the dilation of vertebral arteries after BCCAO. The number of microvessels declined at 2, 3, and 4 weeks but increased at 6 weeks after BCCAO. Neuronal degeneration occurred in the cortex and striatum from 2 to 6 weeks, but the number of glial cells dramatically increased at 4 weeks after BCCAO. Cognitive impairment of ischemic rats was directly related to ischemic duration. Our results suggest that CCH induces a compensative mechanism attempting to maintain optimal CBF to the brain. However, this limited compensation cannot prevent neuronal loss and cognitive impairment after permanent ischemia.
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Walberer M, Rueger MA. The macrosphere model-an embolic stroke model for studying the pathophysiology of focal cerebral ischemia in a translational approach. ANNALS OF TRANSLATIONAL MEDICINE 2015. [PMID: 26207251 DOI: 10.3978/j.issn.2305-5839.2015.04.02] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
The main challenge of stroke research is to translate promising experimental findings from the bench to the bedside. Many suggestions have been made how to achieve this goal, identifying the need for appropriate experimental animal models as one key issue. We here discuss the macrosphere model of focal cerebral ischemia in the rat, which closely resembles the pathophysiology of human stroke both in its acute and chronic phase. Key pathophysiological processes such as brain edema, cortical spreading depolarizations (CSD), neuroinflammation, and stem cell-mediated regeneration are observed in this stroke model, following characteristic temporo-spatial patterns. Non-invasive in vivo imaging allows studying the macrosphere model from the very onset of ischemia up to late remodeling processes in an intraindividual and longitudinal fashion. Such a design of pre-clinical stroke studies provides the basis for a successful translation into the clinic.
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Affiliation(s)
- Maureen Walberer
- 1 Department of Neurology, University Hospital of Cologne, Cologne, Germany ; 2 Max-Planck-Institute for Metabolism Research, Cologne, Germany ; 3 Animal Welfare Office, University of Cologne, Germany
| | - Maria Adele Rueger
- 1 Department of Neurology, University Hospital of Cologne, Cologne, Germany ; 2 Max-Planck-Institute for Metabolism Research, Cologne, Germany ; 3 Animal Welfare Office, University of Cologne, Germany
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28
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Juenemann M, Braun T, Doenges S, Nedelmann M, Mueller C, Bachmann G, Singh P, Blaes F, Gerriets T, Tschernatsch M. Aquaporin-4 autoantibodies increase vasogenic edema formation and infarct size in a rat stroke model. BMC Immunol 2015; 16:30. [PMID: 25986484 PMCID: PMC4437448 DOI: 10.1186/s12865-015-0087-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 03/25/2015] [Indexed: 01/01/2023] Open
Abstract
Background Neuromyelitis optica (NMO) is an autoimmune disorder of the central nervous system, which is characterized by autoantibodies directed against the water channel aquaporin-4 (AQP4). As one of the main water regulators in the central nervous system, APQ4 is supposed to be involved in the dynamics of brain edema. Cerebral edema seriously affects clinical outcome after ischemic stroke; we therefore aimed to investigate whether NMO-antibodies may exert the same functional effects as an AQP4-inhibitor in-vivo in acute ischemic stroke. Methods Sixteen male Wistar rats were randomized into two groups twice receiving either purified NMO-IgG or immune globulin from healthy controls, 24 hours and 30 minutes before middle cerebral artery occlusion (MCAO) was performed. T2-weighted MRI was carried out 24 hours after MCAO. Results MRI-examination showed a significant increase of infarct size in relation to the cerebral hemisphere volume with NMO-IgG treated animals (27.1% ± 11.1% vs. 14.3% ± 7.2%; p < 0.05) when corrected for the space-occupying effect of vasogenic edema formation and similar results without edema correction (34.4% ± 16.4% vs. 17.5% ± 9.3%; p < 0.05). Furthermore, T2-RT revealed a significant increase in cortical brain water content of the treatment group (19.5 ms ± 9.7 ms vs. 9.2 ms ± 5.2 ms; p < 0.05). Conclusions These results support the functional impact of NMO-antibodies and also offer an in-vivo-applicable animal model to investigate the properties of AQP4 in ischemic stroke.
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Affiliation(s)
- Martin Juenemann
- Heart & Brain Research Group, Justus-Liebig-University Giessen and Kerckhoff Clinic, Benekestrasse 2-8, 61231, Bad Nauheim, Germany. .,Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany.
| | - Tobias Braun
- Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany.
| | - Simone Doenges
- Heart & Brain Research Group, Justus-Liebig-University Giessen and Kerckhoff Clinic, Benekestrasse 2-8, 61231, Bad Nauheim, Germany.
| | - Max Nedelmann
- Heart & Brain Research Group, Justus-Liebig-University Giessen and Kerckhoff Clinic, Benekestrasse 2-8, 61231, Bad Nauheim, Germany. .,Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany.
| | - Clemens Mueller
- Department of Radiology, Kerckhoff Clinic, Benekestrasse 2-8, 61231, Bad Nauheim, Germany.
| | - Georg Bachmann
- Department of Radiology, Kerckhoff Clinic, Benekestrasse 2-8, 61231, Bad Nauheim, Germany.
| | - Pratibha Singh
- Department of Pharmacology, Max-Planck-Institute for Heart and Lung Research, Ludwigstraße 43, 61231, Bad Nauheim, Germany.
| | - Franz Blaes
- Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany. .,Department of Neurology, Kreiskrankenhaus Gummersbach, Wilhelm-Breckow-Allee 20, 51643, Gummersbach, Germany.
| | - Tibo Gerriets
- Heart & Brain Research Group, Justus-Liebig-University Giessen and Kerckhoff Clinic, Benekestrasse 2-8, 61231, Bad Nauheim, Germany. .,Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany. .,Department of Neurology, Buergerhospital Friedberg, Ockstaedter Strasse 3-5, 61169, Friedberg, Germany.
| | - Marlene Tschernatsch
- Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392, Giessen, Germany.
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Divani AA, Chow R, Sadeghi-Bazargani H, Murphy AJ, Nordberg JA, Tokarev JV, Hevesi M, Wang X, Zhu XH, Acompanado T, Edwards PA, Zhang Y, Chen W. Focal middle cerebral artery ischemia in rats via a transfemoral approach using a custom designed microwire. J Neurointerv Surg 2015; 8:608-14. [PMID: 25935923 DOI: 10.1136/neurintsurg-2014-011607] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 04/15/2015] [Indexed: 11/03/2022]
Abstract
OBJECTIVES The aim of this study was to develop a reliable and repeatable method of inducing focal middle cerebral artery occlusion (MCAo) in rats without ligation of the external carotid artery (ECA), while reducing the risk of subarachnoid hemorrhage. METHODS We prototyped microwires with different diameters (0.0120 inch, 0.0115 inch, 0.0110 inch), materials, and construction methods (coil-on-core, extruded polymer jacket-on-core). Under fluoroscopic guidance and using femoral artery access, the microwires were navigated into the internal carotid artery of male Wistar rats (n=50, weight 376±64 g) to induce MCAo for 1 or 2 h. We performed neurological assessments at baseline, and at 3, 24, 72, and 168 h after MCAo. MRI measurements were performed on a 9.4 T scanner at 1 and 7 days post-injury. RESULTS The 0.0115 inch microwire with polymer jacket-on-core provided the most successful outcome. At 1 and 7 days post-injury, we observed similar infarction volumes for 1 and 2 h MCAo in the MRI study. Infarcted lesion volumes in both MCAo groups were significantly reduced at 7 days compared with 1 day post-injury. The trend in longitudinal changes for the scores of different neurological assessments was confirmed to be significant after the injury, but both groups showed a similar trend of neurological deficits over the course of the study. CONCLUSIONS We have developed a reliable and repeatable MCAo method in rats, allowing for precise occlusion of the MCA under direct fluoroscopic visualization without alteration of the cerebral hemodynamics associated with ECA ligation. The custom designed microwire can also be sized for targeted focal ischemia in larger animals.
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Affiliation(s)
- Afshin A Divani
- Department of Neurology, University of Minnesota, Minneapolis, Minnesota, USA Department of Neurological Surgery, University of Minnesota, Minneapolis, Minnesota, USA Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota, USA
| | - Ricky Chow
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota, USA Lake Region Medical, Chaska, Minnesota, USA
| | - Homayoun Sadeghi-Bazargani
- Neurosciences Research Center, Tabriz University of Medical Sciences, Iran Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
| | - Amanda J Murphy
- Department of Neurology, University of Minnesota, Minneapolis, Minnesota, USA Medical School, University of Minnesota, Minneapolis, Minnesota, USA
| | - Jessica A Nordberg
- Department of Neurology, University of Minnesota, Minneapolis, Minnesota, USA
| | - Julian V Tokarev
- Department of Neurology, University of Minnesota, Minneapolis, Minnesota, USA Medical School, University of Minnesota, Minneapolis, Minnesota, USA
| | - Mario Hevesi
- Department of Neurology, University of Minnesota, Minneapolis, Minnesota, USA Medical School, University of Minnesota, Minneapolis, Minnesota, USA
| | - Xiao Wang
- Department of Radiology, Center for Magnetic Imaging Research, University of Minnesota, Minneapolis, Minnesota, USA
| | - Xiao-Hong Zhu
- Department of Radiology, Center for Magnetic Imaging Research, University of Minnesota, Minneapolis, Minnesota, USA
| | | | | | - Yi Zhang
- Department of Radiology, Center for Magnetic Imaging Research, University of Minnesota, Minneapolis, Minnesota, USA
| | - Wei Chen
- Department of Radiology, Center for Magnetic Imaging Research, University of Minnesota, Minneapolis, Minnesota, USA
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Fluri F, Grünstein D, Cam E, Ungethuem U, Hatz F, Schäfer J, Samnick S, Israel I, Kleinschnitz C, Orts-Gil G, Moch H, Zeis T, Schaeren-Wiemers N, Seeberger P. Fullerenols and glucosamine fullerenes reduce infarct volume and cerebral inflammation after ischemic stroke in normotensive and hypertensive rats. Exp Neurol 2015; 265:142-51. [DOI: 10.1016/j.expneurol.2015.01.005] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 01/15/2015] [Indexed: 11/29/2022]
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31
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Zhao B, Shang G, Chen J, Geng X, Ye X, Xu G, Wang J, Zheng J, Li H, Akbary F, Li S, Lu J, Ling F, Ji X. A more consistent intraluminal rhesus monkey model of ischemic stroke. Neural Regen Res 2014; 9:2087-94. [PMID: 25657726 PMCID: PMC4316474 DOI: 10.4103/1673-5374.147936] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/22/2014] [Indexed: 01/20/2023] Open
Abstract
Endovascular surgery is advantageous in experimentally induced ischemic stroke because it causes fewer cranial traumatic lesions than invasive surgery and can closely mimic the pathophysiology in stroke patients. However, the outcomes are highly variable, which limits the accuracy of evaluations of ischemic stroke studies. In this study, eight healthy adult rhesus monkeys were randomized into two groups with four monkeys in each group: middle cerebral artery occlusion at origin segment (M1) and middle cerebral artery occlusion at M2 segment. The blood flow in the middle cerebral artery was blocked completely for 2 hours using the endovascular microcoil placement technique (1 mm × 10 cm) (undetachable), to establish a model of cerebral ischemia. The microcoil was withdrawn and the middle cerebral artery blood flow was restored. A reversible middle cerebral artery occlusion model was identified by hematoxylin-eosin staining, digital subtraction angiography, magnetic resonance angiography, magnetic resonance imaging, and neurological evaluation. The results showed that the middle cerebral artery occlusion model was successfully established in eight adult healthy rhesus monkeys, and ischemic lesions were apparent in the brain tissue of rhesus monkeys at 24 hours after occlusion. The rhesus monkeys had symptoms of neurological deficits. Compared with the M1 occlusion group, the M2 occlusion group had lower infarction volume and higher neurological scores. These experimental findings indicate that reversible middle cerebral artery occlusion can be produced with the endovascular microcoil technique in rhesus monkeys. The M2 occluded model had less infarction and less neurological impairment, which offers the potential for application in the field of brain injury research.
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Affiliation(s)
- Bo Zhao
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Guowei Shang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Jian Chen
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Xiaokun Geng
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Xin Ye
- Department of Anesthesiology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Guoxun Xu
- Department of Anesthesiology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Ju Wang
- Department of Laboratory Animal Science, Capital Medical University, Beijing, China
| | - Jiasheng Zheng
- Radiology Department, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Hongjun Li
- Radiology Department, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Fauzia Akbary
- Wayne State University School of Medicine, Detroit, MI, USA
| | - Shengli Li
- Department of Laboratory Animal Science, Capital Medical University, Beijing, China
| | - Jing Lu
- Department of Laboratory Animal Science, Capital Medical University, Beijing, China
| | - Feng Ling
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Xunming Ji
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Center of Stroke, Beijing Institute for Brain Disorders, Beijing, China
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Robertson CA, McCabe C, Lopez-Gonzalez MR, Deuchar GA, Dani K, Holmes WM, Muir KW, Santosh C, Macrae IM. Detection of ischemic penumbra using combined perfusion and T2* oxygen challenge imaging. Int J Stroke 2014; 10:42-50. [PMID: 25042078 PMCID: PMC4283703 DOI: 10.1111/ijs.12327] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 05/27/2014] [Indexed: 01/28/2023]
Abstract
Background Acute ischemic stroke is common and disabling, but there remains a paucity of acute treatment options and available treatment (thrombolysis) is underutilized. Advanced brain imaging, designed to identify viable hypoperfused tissue (penumbra), could target treatment to a wider population. Existing magnetic resonance imaging and computed tomography-based technologies are not widely used pending validation in ongoing clinical trials. T2* oxygen challenge magnetic resonance imaging, by providing a more direct readout of tissue viability, has the potential to identify more patients likely to benefit from thrombolysis – irrespective of time from stroke onset – and patients within and beyond the 4·5 h thrombolysis treatment window who are unlikely to benefit and are at an increased risk of hemorrhage. Aims This study employs serial multimodal imaging and voxel-based analysis to develop optimal data processing for T2* oxygen challenge penumbra assessment. Tissue in the ischemic hemisphere is compartmentalized into penumbra, ischemic core, or normal using T2* oxygen challenge (single threshold) or T2* oxygen challenge plus cerebral blood flow (dual threshold) data. Penumbra defined by perfusion imaging/apparent diffusion coefficient mismatch (dual threshold) is included for comparison. Methods Permanent middle cerebral artery occlusion was induced in male Sprague-Dawley rats (n = 6) prior to serial multimodal imaging: T2* oxygen challenge, diffusion-weighted and perfusion imaging (cerebral blood flow using arterial spin labeling). Results Across the different methods evaluated, T2* oxygen challenge combined with perfusion imaging most closely predicted 24 h infarct volume. Penumbra volume declined from one to four-hours post-stroke: mean ± SD, 77 ± 44 to 49 ± 37 mm3 (single T2* oxygen challenge-based threshold); 55 ± 41 to 37 ± 12 mm3 (dual T2* oxygen challenge/cerebral blood flow); 84 ± 64 to 42 ± 18 mm3 (dual cerebral blood flow/apparent diffusion coefficient), as ischemic core grew: 155 ± 37 to 211 ± 36 mm3 (single apparent diffusion coefficient threshold); 178 ± 56 to 205 ± 33 mm3 (dual T2* oxygen challenge/cerebral blood flow); 139 ± 30 to 168 ± 38 mm3 (dual cerebral blood flow/apparent diffusion coefficient). There was evidence of further lesion growth beyond four-hours (T2-defined edema-corrected infarct, 231 ± 19 mm3). Conclusions In conclusion, T2* oxygen challenge combined with perfusion imaging has advantages over alternative magnetic resonance imaging techniques for penumbra detection by providing serial assessment of available penumbra based on tissue viability.
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Affiliation(s)
- Craig A Robertson
- Centre for Stroke and Brain Imaging Research, Institute of Neuroscience and Psychology, College of Medicine, Veterinary & Life Sciences, University of Glasgow, Glasgow, UK
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Güzel A, Rölz R, Nikkhah G, Kahlert UD, Maciaczyk J. A microsurgical procedure for middle cerebral artery occlusion by intraluminal monofilament insertion technique in the rat: a special emphasis on the methodology. EXPERIMENTAL & TRANSLATIONAL STROKE MEDICINE 2014; 6:6. [PMID: 24949193 PMCID: PMC4063429 DOI: 10.1186/2040-7378-6-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 05/09/2014] [Indexed: 11/10/2022]
Abstract
Introduction Although there are many experimental studies describing the methodology of the middle cerebral artery occlusion (MCAO) in the literature, only limited data on these distinct anatomical structures and the details of the surgical procedure in a step by step manner. The aim of the present study simply is to examine the surgical anatomy of MCAO model and its modifications in the rat. Materials and methods Forty Sprague-Dawley rats were used; 20 during the training phase and 20 for the main study. The monofilament sutures were prepared as described in the literature. All surgical steps of the study were performed under the operating microscope, including insertion of monofilament into middle cerebral artery through the internal carotid artery. Results After an extensive training period, we lost two rats in four weeks. The effects of MCAO were confirmed by the evidence of severe motor deficit during the recovery period, and histopathological findings of infarction were proved in all 18 surviving rats. Conclusion In this study, a microsurgical guideline of the MCAO model in the rat is provided with the detailed description of all steps of the intraluminal monofilament insertion method with related figures.
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Affiliation(s)
- Aslan Güzel
- Department of Neurosurgery, Bahcesehir University, MedicalPark Hospital, 27060 Sehit Kamil, Gaziantep, Turkey
| | - Roland Rölz
- Department of Neurosurgery, University Medical Center Freiburg, Breisacher Strasse 66, 79106 Freiburg, Germany
| | - Guido Nikkhah
- Department of Stereotactic Neurosurgery, University Medical Center Erlangen, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Ulf D Kahlert
- Department of Neurosurgery, University Medical Center Duesseldorf, Moorenstrasse 5, 40225 Duesseldorf, Germany ; Department of Pathology, Division of Neuropathology, Johns Hopkins Hospital, 400 N Wolfe Street, Baltimore 21231, USA
| | - Jaroslaw Maciaczyk
- Department of Neurosurgery, University Medical Center Duesseldorf, Moorenstrasse 5, 40225 Duesseldorf, Germany
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Mode of action of S-methyl-N, N-diethylthiocarbamate sulfoxide (DETC-MeSO) as a novel therapy for stroke in a rat model. Mol Neurobiol 2014; 50:655-72. [PMID: 24573692 DOI: 10.1007/s12035-014-8658-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 02/05/2014] [Indexed: 10/25/2022]
Abstract
One approach for protecting neurons from excitotoxic damage in stroke is to attenuate receptor activity with specific antagonists. S-Methyl-N, N-diethylthiocarbamate sulfoxide (DETC-MeSO), the active metabolite of disulfiram, has been shown to be a partial antagonist of glutamate receptors and effective in reducing seizure. First, we investigated neuroprotective effect of DETC-MeSO on primary cortical neuronal culture under hypoxia/reoxygenation condition in vitro. Then, DETC-MeSO was administered subcutaneously for 4 and 8 days with the first injection occurring 1 h before or 24 h after reperfusion in the rat middle cerebral artery occlusion stroke model. Rats were subjected to the neuroscore test, and the brain was analyzed for infarct size. Monitoring neurotransmitter release was carried out by microdialysis. Heat shock proteins, key proteins involved in apoptosis and endoplasmic reticulum (ER) stress, were analyzed by immunoblotting. DETC-MeSO greatly reduced both cell death following hypoxia/reoxygenation and brain infarct size. It improved performance on the neuroscore test and attenuated proteolysis of αII-spectrin. The level of pro-apoptotic proteins declined, and anti-apoptotic and HSP27 protein expressions were markedly increased. Levels of the ER stress protein markers p-PERK, p-eIF2α, ATF4, JNK, XBP-1, GADD34, and CHOP significantly declined after DETC-MeSO administration. Microdialysis data showed that DETC-MeSO increased high potassium-induced striatal dopamine release indicating that more neurons were protected and survived under ischemic insult in the presence of DETC-MeSO. We also showed that DETC-MeSO can prevent gliosis. DETC-MeSO elicits neuroprotection through the preservation of ER resulting in reduction of apoptosis by increase of anti-apoptotic proteins and decrease of pro-apoptotic proteins.
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Abstract
AbstractPrevious reports revealed that middle cerebral artery occlusion (MCAO) models in rats were very diverse in nature, and experimental stroke of a more homogenous nature had not been previously documented. This paper aims to present our novel observations of experimental stroke in rats with similar MRI characteristics after MCAO. Immediately after MCAO, 19 rats were placed into a 4.7 T MRI scanner, and diffusion weighted imaging (DWI) of axial and coronal planes was repeated every 10 minutes up to post-occlusion 115 minutes. Apparent diffusion coefficient (ADC) values of the ischemic lesions were calculated and compared to those of the unaffected contra-lateral hemispheres. Successful MCAO was defined when the whole left MCA territory showed ADC abnormality on DWI. Percentage of hemispheric lesion volume (% HLV), relative ADC value (rADC), and relative DWI signal intensity (rDWI) were serially evaluated for quantitative analysis of ADC-derived lesion characteristics. Successful MCA territorial infarction was induced in nine rats (9/19, 47.4%). In quantitative analysis of ADC-derived lesion characteristics, lesion volumes of seven rats (group 1) were very similar, but larger than those of the other two rats (group 2): % HLV of initial MRI = 45.4 ± 2.5 / 19.1 ± 6.6. rADCs and rDWIs of group 1 showed similar patterns of temporal change, which was different from those of group 2. Using prospective diffusion MRI after MCAO in rats, we identified territorial hyperacute ischemic lesions with similar MRI characteristics. This observation would contribute to the establishment of more homogenous rodent models for ischemic stroke translational research.
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Juenemann M, Yeniguen M, Schleicher N, Blumenstein J, Nedelmann M, Tschernatsch M, Bachmann G, Kaps M, Urbanek P, Schoenburg M, Gerriets T. Impact of bubble size in a rat model of cerebral air microembolization. J Cardiothorac Surg 2013; 8:198. [PMID: 24139539 PMCID: PMC4016598 DOI: 10.1186/1749-8090-8-198] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2013] [Accepted: 09/24/2013] [Indexed: 11/16/2022] Open
Abstract
Background Cerebral air microembolization (CAM) is a frequent side effect of diagnostic or therapeutic interventions. Besides reduction of the amount of bubbles, filter systems in the clinical setting may also lead to a dispersion of large gas bubbles and therefore to an increase of the gas–liquid-endothelium interface. We evaluated the production and application of different strictly defined bubble diameters in a rat model of CAM and assessed functional outcome and infarct volumes in relation to the bubble diameter. Methods Gas emboli of defined number and diameter were injected into the carotid artery of rats. Group I (n = 7) received 1800 air bubbles with a diameter of 45 μm, group II (n = 7) 40 bubbles of 160 μm, controls (n = 6) saline without gas bubbles; group I and II yielded the same total injection volume of air with 86 nl. Functional outcome was assessed at baseline, after 4 h and 24 h following cerebral MR imaging and infarct size calculation. Results Computer-aided evaluation of bubble diameters showed high constancy (group I: 45.83 μm ± 2.79; group II: 159 μm ± 1.26). Animals in group I and II suffered cerebral ischemia and clinical deterioration without significant difference. Infarct sizes did not differ significantly between the two groups (p = 0.931 u-test). Conclusions We present further development of a new method, which allows reliable and controlled CAM with different bubble diameters, producing neurological deficits due to unilateral cerebral damage. Our findings could not display a strong dependency of stroke frequency and severity on bubble diameter.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Tibo Gerriets
- Department of Neurology, Justus-Liebig-University Giessen, Giessen, Germany.
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Juenemann M, Goegel S, Obert M, Schleicher N, Ritschel N, Doenges S, Eitenmueller I, Schwarz N, Kastaun S, Yeniguen M, Tschernatsch M, Gerriets T. Flat-panel volumetric computed tomography in cerebral perfusion: evaluation of three rat stroke models. J Neurosci Methods 2013; 219:113-23. [PMID: 23880321 DOI: 10.1016/j.jneumeth.2013.07.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2013] [Revised: 07/10/2013] [Accepted: 07/11/2013] [Indexed: 11/16/2022]
Abstract
Flat-panel volumetric computed tomography (fpVCT) is a non-invasive approach to three-dimensional small animal imaging. The capability of volumetric scanning and a high resolution in time and space enables whole organ perfusion studies. We aimed to assess feasibility and validity of fpVCT in cerebral perfusion measurement with impaired hemodynamics by evaluation of three well-established rat stroke models for temporary and permanent middle cerebral artery occlusion (MCAO). Male Wistar rats were randomly assigned to temporary (group I: suture model) and permanent (group II: suture model; III: macrosphere model) MCAO and to a control group. Perfusion scans with respect to cerebral blood flow (CBF) and volume (CBV) were performed 24h post intervention by fpVCT, using a Gantry rotation time of 1s and a total scanning time of 30s. Postmortem analysis included infarct-size calculation by 2,3,5-triphenyltetrazolium chloride (TTC) staining. Infarct volumes did not differ significantly throughout intervention groups. After permanent MCAO, CBF significantly decreased in subcortical regions to 78.2% (group II, p=0.005) and 79.9% (group III, p=0.012) and in total hemisphere to 77.4% (group II, p=0.010) and 82.0% (group III, p=0.049). CBF was less impaired with temporary vessel occlusion. CBV measurement revealed no significant differences. Results demonstrate feasibility of cerebral perfusion quantification in rats with the fpVCT, which can be a useful tool for non-invasive dynamic imaging of cerebral perfusion in rodent stroke models. In addition to methodological advantages, CBF data confirm the macrosphere model as a useful alternative to the suture model for permanent experimental MCAO.
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Affiliation(s)
- Martin Juenemann
- Department of Neurology, Justus-Liebig-University Giessen, Klinikstrasse 33, 35392 Giessen, Germany.
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Neuropilin-1 modulates vascular endothelial growth factor-induced poly(ADP-ribose)-polymerase leading to reduced cerebrovascular apoptosis. Neurobiol Dis 2013; 59:111-25. [PMID: 23816753 DOI: 10.1016/j.nbd.2013.06.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 05/21/2013] [Accepted: 06/15/2013] [Indexed: 01/13/2023] Open
Abstract
Cerebral ischemia is encompassed by cerebrovascular apoptosis, yet the mechanisms behind apoptosis regulation are not fully understood. We previously demonstrated inhibition of endothelial apoptosis by vascular endothelial growth factor (VEGF) through upregulation of poly(ADP-ribose)-polymerase (PARP) expression. However, PARP overactivation through oxidative stress can lead to necrosis. This study tested the hypothesis that neuropilin-1 (NP-1), an alternative VEGF receptor, regulates the response to cerebral ischemia by modulating PARP expression and, in turn, apoptosis inhibition by VEGF. In endothelial cell culture, NP-1 colocalized with VEGF receptor-2 (VEGFR-2) and acted as its coreceptor. This significantly enhanced VEGF-induced PARP mRNA and protein expression demonstrated by receptor-specific inhibitors and VEGF-A isoforms. NP-1 augmented the inhibitory effect of VEGF/VEGFR-2 interaction on apoptosis induced by adhesion inhibition through the αV-integrin inhibitor cRGDfV. NP-1/VEGFR-2 signal transduction involved JNK and Akt. In rat models of permanent and temporary middle cerebral artery occlusion, the ischemic cerebral hemispheres displayed endothelial and neuronal apoptosis next to increased endothelial NP-1 and VEGFR-2 expression compared to non-ischemic cerebral hemispheres, sham-operated or untreated controls. Increased vascular superoxide dismutase-1 and catalase expression as well as decreased glycogen reserves indicated oxidative stress in the ischemic brain. Of note, protein levels of intact PARP remained stable despite pro-apoptotic conditions through increased PARP mRNA production during cerebral ischemia. In conclusion, NP-1 is upregulated in conditions of imminent cerebrovascular apoptosis to reinforce apoptosis inhibition and modulate VEGF-dependent PARP expression and activation. We propose that NP-1 is a key modulator of VEGF maintaining cerebrovascular integrity during ischemia. Modulating the function of NP-1 to target PARP could help to prevent cellular damage in cerebrovascular disease.
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Livingston-Thomas JM, Tasker RA. Animal models of post-ischemic forced use rehabilitation: methods, considerations, and limitations. EXPERIMENTAL & TRANSLATIONAL STROKE MEDICINE 2013; 5:2. [PMID: 23343500 PMCID: PMC3605246 DOI: 10.1186/2040-7378-5-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Accepted: 01/15/2013] [Indexed: 12/12/2022]
Abstract
Many survivors of stroke experience arm impairments, which can severely impact their quality of life. Forcing use of the impaired arm appears to improve functional recovery in post-stroke hemiplegic patients, however the mechanisms underlying improved recovery remain unclear. Animal models of post-stroke rehabilitation could prove critical to investigating such mechanisms, however modeling forced use in animals has proven challenging. Potential problems associated with reported experimental models include variability between stroke methods, rehabilitation paradigms, and reported outcome measures. Herein, we provide an overview of commonly used stroke models, including advantages and disadvantages of each with respect to studying rehabilitation. We then review various forced use rehabilitation paradigms, and highlight potential difficulties and translational problems. Lastly, we discuss the variety of functional outcome measures described by experimental researchers. To conclude, we outline ongoing challenges faced by researchers, and the importance of translational communication. Many stroke patients rely critically on rehabilitation of post-stroke impairments, and continued effort toward progression of rehabilitative techniques is warranted to ensure best possible treatment of the devastating effects of stroke.
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Affiliation(s)
- Jessica M Livingston-Thomas
- Department of Biomedical Sciences University of Prince Edward Island, 550 University Avenue, Charlottetown, PEI C1A4P3, Canada.
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Bleilevens C, Roehl AB, Goetzenich A, Zoremba N, Kipp M, Dang J, Tolba R, Rossaint R, Hein M. Effect of anesthesia and cerebral blood flow on neuronal injury in a rat middle cerebral artery occlusion (MCAO) model. Exp Brain Res 2012; 224:155-64. [PMID: 23064810 DOI: 10.1007/s00221-012-3296-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Accepted: 09/29/2012] [Indexed: 12/20/2022]
Abstract
Middle cerebral artery occlusion (MCAO) models have become well established as the most suitable way to simulate stroke in experimental studies. The high variability in the size of the resulting infarct due to filament composition, rodent strain and vessel anatomy makes the setup of such models very complex. Beside controllable variables of homeostasis, the choice of anesthetics and the grade of ischemia and reperfusion played a major role for extent of neurological injury. Transient MCAO was induced during either isoflurane or ketamine/xylazine (ket/xyl) anesthesia with simultaneously measurement of cerebral blood flow (CBF) in 60 male Wistar rats (380-420 g). Neurological injury was quantified after 24 h. Isoflurane compared with ket/xyl improved mortality 24 h after MCAO (10 vs. 50 %, p = 0.037) and predominantly led to striatal infarcts (78 vs. 18 %, p = 0.009) without involvement of the neocortex and medial caudoputamen. Independent of anesthesia type, cortical infarcts could be predicted with a sensitivity of 67 % and a specificity of 100 % if CBF did not exceed 35 % of the baseline value during ischemia. In all other cases, cortical infarcts developed if the reperfusion values remained below 50 %. Hyperemia during reperfusion significantly increased infarct and edema volumes. The cause of frequent striatal infarcts after isoflurane anesthesia might be attributed to an improved CBF during ischemia (46 ± 15 % vs. 35 ± 19 %, p = 0.04). S-100β release, edema volume and upregulation of IL-6 and IL-1β expression were impeded by isoflurane. Thus, anesthetic management as well as the grade of ischemia and reperfusion after transient MCAO demonstrated important effects on neurological injury.
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Affiliation(s)
- C Bleilevens
- Department of Anesthesiology, University Hospital Aachen, Pauwelsstrasse 30, 52074 Aachen, Germany
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Michalski D, Weise C, Hobohm C, Küppers-Tiedt L, Pelz J, Schneider D, Kacza J, Härtig W. Autonomic reactions and peri-interventional alterations in body weight as potential supplementary outcome parameters for thromboembolic stroke in rats. EXPERIMENTAL & TRANSLATIONAL STROKE MEDICINE 2012; 4:7. [PMID: 22510241 PMCID: PMC3398859 DOI: 10.1186/2040-7378-4-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Accepted: 04/17/2012] [Indexed: 12/02/2022]
Abstract
Background Since several neuroprotectives failed to reproduce promising preclinical results under clinical conditions, efforts emerged to implement clinically relevant endpoints in animal stroke studies. Thereby, insufficient attention was given on autonomic reactions due to experimental stroke, although clinical trials reported on high functional and prognostic impact. This study focused on autonomic consequences and body weight changes in a translational relevant stroke model and investigated interrelations to different outcome measurements. Methods Forty-eight rats underwent thromboembolic middle cerebral artery occlusion (MCAO) while recording heart rate (HR) and mean arterial pressure (MAP). After assessing early functional impairment (Menzies score), animals were assigned to control procedure or potentially neuroprotective treatment with normobaric (NBO) or hyperbaric oxygen (HBO). Four or 24 hours after ischemia onset, functional impairment was re-assessed and FITC-albumin administered intravenously obtaining leakage-related blood–brain barrier (BBB) impairment. Body weight was documented prior to MCAO and 4 or 24 hours after ischemia onset. Results During MCAO, HR was found to increase significantly while MAP decreased. The amount of changes in HR was positively correlated with early functional impairment (P = 0.001): Severely affected animals provided an increase of 15.2 compared to 0.8 beats/minute in rats with low impairment (P = 0.048). Regarding body weight, a decrease of 9.4% within 24 hours after MCAO occurred, but treatment-specific alterations showed no significant correlations with respective functional or BBB impairment. Conclusions Future studies should routinely include autonomic parameters to allow inter-group comparisons and better understanding of autonomic reactions due to experimental stroke. Prospectively, autonomic consequences might represent a useful outcome parameter enhancing the methodological spectrum of preclinical stroke studies.
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Affiliation(s)
- Dominik Michalski
- Department of Neurology, University of Leipzig, Liebigstr, 20, 04103, Leipzig, Germany.
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Zuo XL, Wu P, Ji AM. Nylon filament coated with paraffin for intraluminal permanent middle cerebral artery occlusion in rats. Neurosci Lett 2012; 519:42-6. [DOI: 10.1016/j.neulet.2012.05.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 05/02/2012] [Accepted: 05/03/2012] [Indexed: 11/16/2022]
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Guan Y, Wang Y, Yuan F, Lu H, Ren Y, Xiao T, Chen K, Greenberg DA, Jin K, Yang GY. Effect of suture properties on stability of middle cerebral artery occlusion evaluated by synchrotron radiation angiography. Stroke 2011; 43:888-91. [PMID: 22180249 DOI: 10.1161/strokeaha.111.636456] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE The intraluminal suture technique for producing middle cerebral artery occlusion in rodents is the most commonly used method for modeling focal cerebral ischemia associated with clinical ischemic stroke. Synchrotron radiation angiography may provide a novel solution to directly monitor the success of middle cerebral artery occlusion. METHODS Twenty adult Sprague-Dawley rats for middle cerebral artery occlusion models were prepared randomly with different suture head silicone coating. In vivo imaging was performed at beam line BL13W1, Shanghai Synchrotron Radiation Facility, Shanghai, China. RESULTS Silicone-coated suture was superior to uncoated suture for producing consistent brain infarction. Additionally, silicone coating length was an important variable controlling the extent of the ischemic lesion: infarcts affected predominantly the caudate-putamen with large variability (<2 mm), both the cortex and caudate-putamen (2-3.3 mm), and most of the hemisphere, including the hypothalamus (>3.3 mm). CONCLUSIONS Synchrotron radiation angiography provides a useful tool to observe hemodynamic changes after middle cerebral artery occlusion, and the physical properties of suture are critical to the success of the middle cerebral artery occlusion model.
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Affiliation(s)
- Yongjing Guan
- Department of Radiology, Ruijin Hospital, School of Medicine, Shanghai, China
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Rink C, Christoforidis G, Khanna S, Peterson L, Patel Y, Khanna S, Abduljalil A, Irfanoglu O, Machiraju R, Bergdall VK, Sen CK. Tocotrienol vitamin E protects against preclinical canine ischemic stroke by inducing arteriogenesis. J Cereb Blood Flow Metab 2011; 31:2218-30. [PMID: 21673716 PMCID: PMC3210346 DOI: 10.1038/jcbfm.2011.85] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Vitamin E consists of tocopherols and tocotrienols, in which α-tocotrienol is the most potent neuroprotective form that is also effective in protecting against stroke in rodents. As neuroprotective agents alone are insufficient to protect against stroke, we sought to test the effects of tocotrienol on the cerebrovascular circulation during ischemic stroke using a preclinical model that enables fluoroscopy-guided angiography. Mongrel canines (mean weight=26.3±3.2 kg) were supplemented with tocotrienol-enriched (TE) supplement (200 mg b.i.d, n=11) or vehicle placebo (n=9) for 10 weeks before inducing transient middle cerebral artery (MCA) occlusion. Magnetic resonance imaging was performed 1 hour and 24 hours post reperfusion to assess stroke-induced lesion volume. Tocotrienol-enriched supplementation significantly attenuated ischemic stroke-induced lesion volume (P<0.005). Furthermore, TE prevented loss of white matter fiber tract connectivity after stroke as evident by probabilistic tractography. Post hoc analysis of cerebral angiograms during MCA occlusion revealed that TE-supplemented canines had improved cerebrovascular collateral circulation to the ischemic MCA territory (P<0.05). Tocotrienol-enriched supplementation induced arteriogenic tissue inhibitor of metalloprotease 1 and subsequently attenuated the activity of matrix metalloproteinase-2. Outcomes of the current preclinical trial set the stage for a clinical trial testing the effects of TE in patients who have suffered from transient ischemic attack and are therefore at a high risk for stroke.
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Affiliation(s)
- Cameron Rink
- Department of Surgery, The Ohio State University Medical Center, Columbus, Ohio 43210, USA
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Lipsanen A, Jolkkonen J. Experimental approaches to study functional recovery following cerebral ischemia. Cell Mol Life Sci 2011; 68:3007-17. [PMID: 21626271 PMCID: PMC11114796 DOI: 10.1007/s00018-011-0733-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Revised: 05/10/2011] [Accepted: 05/12/2011] [Indexed: 01/10/2023]
Abstract
Valid experimental models and behavioral tests are indispensable for the development of therapies for stroke. The translational failure with neuroprotective drugs has forced us to look for alternative approaches. Restorative therapies aiming to facilitate the recovery process by pharmacotherapy or cell-based therapy have emerged as promising options. Here we describe the most common stroke models used in cell-based therapy studies with particular emphasis on their inherent complications, which may affect behavioral outcome. Loss of body weight, stress, hyperthermia, immunodepression, and infections particularly after severe transient middle cerebral artery occlusion (filament model) are recognized as possible confounders to impair performance in certain behavioral tasks and bias the treatment effects. Inherent limitations of stroke models should be carefully considered when planning experiments to ensure translation of behavioral data to the clinic.
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Affiliation(s)
- Anu Lipsanen
- Institute of Clinical Medicine - Neurology, University of Eastern Finland, Yliopistonranta 1C, FI-70210 Kuopio, Finland
- Brain Research and Rehabilitation Center Neuron, Kortejoki, FI-71130 Kuopio, Finland
| | - Jukka Jolkkonen
- Institute of Clinical Medicine - Neurology, University of Eastern Finland, Yliopistonranta 1C, FI-70210 Kuopio, Finland
- Brain Research and Rehabilitation Center Neuron, Kortejoki, FI-71130 Kuopio, Finland
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Zhang F, Wu Y, Jia J. Electro-acupuncture can alleviate the cerebral oedema of rat after ischemia. Brain Inj 2011; 25:895-900. [PMID: 21699400 DOI: 10.3109/02699052.2011.581639] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PRIMARY OBJECTIVE This study was designed to determine whether electro-acupuncture (EA) could alleviate cerebral oedema after cerebral ischemia. RESEARCH DESIGN EA has been widely used for cerebrovascular disease in East Asian countries. However, whether EA might reduce cerebral oedema after stroke remains unclear. In the current study, diffusion-weighted MRI, which is a reliable method for detecting cerebral oedema, was used to determine whether EA could ameliorate cerebral oedema. METHODS AND PROCEDURES Twelve rats with induced strokes were divided into two groups: one group with EA treatment (EA group) and one group without EA treatment (non-EA group). Both groups of rats underwent MRI scanning at the same time point following ischemia. MAIN OUTCOMES AND RESULTS Diffusion-weighted imaging showed that the relative apparent diffusion coefficient increased significantly in the cortical and sub-cortical areas of the EA group relative to the non-EA group, indicating that EA can alleviate cerebral oedema after ischemic stroke. CONCLUSIONS Electro-acupuncture can alleviate cerebral oedema in rats following ischemia.
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Affiliation(s)
- Feng Zhang
- Department of Rehabilitation, Huashan Hospital, Fudan University, WuLuMuQi Middle Road 12, Shanghai, PR China
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Li H, Yan Z, Zhu J, Yang J, He J. Neuroprotective effects of resveratrol on ischemic injury mediated by improving brain energy metabolism and alleviating oxidative stress in rats. Neuropharmacology 2011; 60:252-8. [DOI: 10.1016/j.neuropharm.2010.09.005] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Revised: 08/03/2010] [Accepted: 09/06/2010] [Indexed: 01/01/2023]
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Senda DM, Franzin S, Mori MA, Oliveira RMWD, Milani H. Acute, post-ischemic sensorimotor deficits correlate positively with infarct size but fail to predict its occurrence and magnitude after middle cerebral artery occlusion in rats. Behav Brain Res 2011; 216:29-35. [DOI: 10.1016/j.bbr.2010.06.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2010] [Revised: 06/13/2010] [Accepted: 06/18/2010] [Indexed: 10/19/2022]
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Dynamics of neuroinflammation in the macrosphere model of arterio-arterial embolic focal ischemia: an approximation to human stroke patterns. EXPERIMENTAL & TRANSLATIONAL STROKE MEDICINE 2010; 2:22. [PMID: 21171972 PMCID: PMC3024233 DOI: 10.1186/2040-7378-2-22] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Accepted: 12/20/2010] [Indexed: 11/15/2022]
Abstract
Background Neuroinflammation evolves as a multi-facetted response to focal cerebral ischemia. It involves activation of resident glia cell populations, recruitment of blood-derived leucocytes as well as humoral responses. Among these processes, phagocyte accumulation has been suggested to be a surrogate marker of neuroinflammation. We previously assessed phagocyte accumulation in human stroke by MRI. We hypothesize that phagocyte accumulation in the macrosphere model may resemble the temporal and spatial patterns observed in human stroke. Methods In a rat model of permanent focal ischemia by embolisation of TiO2-spheres we assessed key features of post-ischemic neuroinflammation by the means of histology, immunocytochemistry of glial activation and influx of hematogeneous cells, and quantitative PCR of TNF-α, IL-1, IL-18, and iNOS mRNA. Results In the boundary zone of the infarct, a transition of ramified microglia into ameboid phagocytic microglia was accompanied by an up-regulation of MHC class II on the cells after 3 days. By day 7, a hypercellular infiltrate consisting of activated microglia and phagocytic cells formed a thick rim around the ischemic infarct core. Interestingly, in the ischemic core microglia could only be observed at day 7. TNF-α was induced rapidly within hours, IL-1β and iNOS peaked within days, and IL-18 later at around 1 week after ischemia. Conclusions The macrosphere model closely resembles the characteristical dynamics of postischemic inflammation previously observed in human stroke. We therefore suggest that the macrosphere model is highly appropriate for studying the pathophysiology of stroke in a translational approach from rodent to human.
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Calloni RL, Winkler BC, Ricci G, Poletto MG, Homero WM, Serafini EP, Corleta OC. Transient middle cerebral artery occlusion in rats as an experimental model of brain ischemia. Acta Cir Bras 2010; 25:428-33. [DOI: 10.1590/s0102-86502010000500008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2010] [Accepted: 05/18/2010] [Indexed: 11/21/2022] Open
Abstract
PURPOSE: To assess a rat model of cerebral ischemia induced by occlusion of the middle cerebral artery and its effect on the area of cerebral infarction. METHODS: Brain ischemia was induced in 52 male Wistar rats by introduction of a 3-0 nylon suture into the middle cerebral artery for either 90 (n=28) or 120 (n=24) minutes. Ischemic injury volume was determined by TTC staining, digital photography and analysis with the Image J software. Statistical analysis employed Student’s t test and the Mann-Whitney U test. RESULTS: The groups were similar in terms of weight (p=0.59). The length of thread inserted was 14.7 mm in the 90 min group and 20.2 mm in the 120 min group (p=0.37). Ischemic injury was detected in 11 animals (39%) after 90 min and 11 (45%) after 120 min (p=0.77). In animals exhibiting injury, filament length was 16.1±11 mm (90 min) vs. 21.9±7.4 mm (120 min) (p=0.15). The mean infarction zone volume was greater after 120 (259.2 mm³) than after 90 min (162.9 mm³) (p=0.04). The neurological deficit score for the 90 and 120 min groups was 2.0 and 2.4, respectively (p=0.84). CONCLUSION: The experimental model induced significant ischemic cerebral injury in both groups.
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