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Cakir-Aktas C, Bodur E, Yemisci M, van Leyen K, Karatas H. 12/15-lipoxygenase inhibition attenuates neuroinflammation by suppressing inflammasomes. Front Cell Neurosci 2023; 17:1277268. [PMID: 37822799 PMCID: PMC10562712 DOI: 10.3389/fncel.2023.1277268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 09/07/2023] [Indexed: 10/13/2023] Open
Abstract
Introduction Lipoxygenases (LOXs) have essential roles in stroke, atherosclerosis, diabetes, and hypertension. 12/15-LOX inhibition was shown to reduce infarct size and brain edema in the acute phase of experimental stroke. However, the significance of 12/15-LOX on neuroinflammation, which has an essential role in the pathophysiology of stroke, has not been clarified yet. Methods In this study, ischemia/recanalization (I/R) was performed by occluding the proximal middle cerebral artery (pMCAo) in mice. Either the 12/15-LOX inhibitor (ML351, 50 mg/kg) or its solvent (DMSO) was injected i.p. at recanalization after 1 h of occlusion. Mice were sacrificed at 6, 24, and 72-h after ischemia induction. Infarct volumes were calculated on Nissl-stained sections. Neurological deficit scoring was used for functional analysis. Lipid peroxidation was determined by the MDA assay, and the inflammatory cytokines IL-6, TNF-alpha, IL-1beta, IL-10, and TGF-beta were quantified by ELISA. The inflammasome proteins NLRP1 and NLRP3, 12/15-LOX, and caspase-1 were detected with immunofluorescence staining. Results Infarct volumes, neurological deficit scores, and lipid peroxidation were significantly attenuated in ML351-treated groups at 6, 24, and 72-h. ELISA results revealed that the pro-inflammatory cytokines IL-1beta, IL-6, and TNF-alpha were significantly decreased at 6-h and/or 24-h of I/R, while the anti-inflammatory cytokines IL-10 and TNF-alpha were increased at 24-h or 72-h of ML351 treatment. NLRP1 and NLRP3 immunosignaling were enhanced at three time points after I/R, which were significantly diminished by the ML351 application. Interestingly, NLRP3 immunoreactivity was more pronounced than NLRP1. Hence, we proceeded to study the co-localization of NLRP3 immunoreactivity with 12/15-LOX and caspase-1, which indicated that NLRP3 was co-localized with 12/15-LOX and caspase-1 signaling. Additionally, NLRP3 was found in neurons at all time points but in non-neuronal cells 72 h after I/R. Discussion These results suggest that 12/15-LOX inhibition suppresses ischemia-induced inflammation in the acute and subacute phases of stroke via suppressing inflammasome activation. Understanding the mechanisms underlying lipid peroxidation and its associated pathways, like inflammasome activation, may have broader implications for the treatment of stroke and other neurological diseases characterized by neuroinflammation.
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Affiliation(s)
- Canan Cakir-Aktas
- Institute of Neurological Sciences & Psychiatry, Hacettepe University, Ankara, Türkiye
| | - Ebru Bodur
- Department of Medical Biochemistry, Faculty of Medicine, Hacettepe University, Ankara, Türkiye
| | - Muge Yemisci
- Institute of Neurological Sciences & Psychiatry, Hacettepe University, Ankara, Türkiye
- Department of Neurology, Faculty of Medicine, Hacettepe University, Ankara, Türkiye
| | - Klaus van Leyen
- Neuroprotection Research Laboratory, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, United States
| | - Hulya Karatas
- Institute of Neurological Sciences & Psychiatry, Hacettepe University, Ankara, Türkiye
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Ninomiya I, Koyama A, Otsu Y, Onodera O, Kanazawa M. Regeneration of the cerebral cortex by direct chemical reprogramming of macrophages into neuronal cells in acute ischemic stroke. Front Cell Neurosci 2023; 17:1225504. [PMID: 37636590 PMCID: PMC10457112 DOI: 10.3389/fncel.2023.1225504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 07/31/2023] [Indexed: 08/29/2023] Open
Abstract
Theoretically, direct chemical reprogramming of somatic cells into neurons in the infarct area represents a promising regenerative therapy for ischemic stroke. Previous studies have reported that human fibroblasts and astrocytes transdifferentiate into neuronal cells in the presence of small molecules without introducing ectopic transgenes. However, the optimal combination of small molecules for the transdifferentiation of macrophages into neurons has not yet been determined. The authors hypothesized that a combination of small molecules could induce the transdifferentiation of monocyte-derived macrophages into neurons and that the administration of this combination may be a regenerative therapy for ischemic stroke because monocytes and macrophages are directly involved in the ischemic area. Transcriptomes and morphologies of the cells were compared before and after stimulation using RNA sequencing and immunofluorescence staining. Microscopic analyses were also performed to identify cell markers and evaluate functional recovery by blinded examination following the administration of small molecules after ischemic stroke in CB-17 mice. In this study, an essential combination of six small molecules [CHIR99021, Dorsomorphin, Forskolin, isoxazole-9 (ISX-9), Y27632, and DB2313] that transdifferentiated monocyte-derived macrophages into neurons in vitro was identified. Moreover, administration of six small molecules after cerebral ischemia in model animals generated a new neuronal layer in the infarct cortex by converting macrophages into neuronal cells, ultimately improving neurological function. These results suggest that altering the transdifferentiation of monocyte-derived macrophages by the small molecules to adjust their adaptive response will facilitate the development of regenerative therapies for ischemic stroke.
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Affiliation(s)
- Itaru Ninomiya
- Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Akihide Koyama
- Department of Legal Medicine, Graduate School of Medical and Dental Science, Niigata University, Niigata, Japan
| | - Yutaka Otsu
- Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Osamu Onodera
- Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Masato Kanazawa
- Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
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Boboc IKS, Rotaru-Zavaleanu AD, Calina D, Albu CV, Catalin B, Turcu-Stiolica A. A Preclinical Systematic Review and Meta-Analysis of Behavior Testing in Mice Models of Ischemic Stroke. Life (Basel) 2023; 13:life13020567. [PMID: 36836924 PMCID: PMC9964520 DOI: 10.3390/life13020567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/10/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023] Open
Abstract
Stroke remains one of the most important causes of death and disability. Preclinical research is a powerful tool for understanding the molecular and cellular response to stroke. However, a lack of standardization in animal evaluation does not always ensure reproducible results. In the present study, we wanted to identify the best strategy for evaluating animal behavior post-experimental stroke. As such, a meta-analysis was made, evaluating behavioral tests done on male C57BL/6 mice subjected to stroke or sham surgery. Overall, fifty-six studies were included. Our results suggest that different types of tests should be used depending on the post-stroke period one needs to analyze. In the hyper-acute, post-stroke period, the best quantifier will be animal examination scoring, as it is a fast and inexpensive way to identify differences between groups. When evaluating stoke mice in the acute phase, a mix of animal examination and motor tests that focus on movement asymmetry (foot-fault and cylinder testing) seem to have the best chance of picking up differences between groups. Complex tasks (the rotarod test and Morris water maze) should be used within the chronic phase to evaluate differences between the late-subacute and chronic phases.
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Affiliation(s)
- Ianis Kevyn Stefan Boboc
- Department of Pharmacology, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
- Experimental Research Centre for Normal and Pathological Aging, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
- U.M.F. Doctoral School Craiova, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Alexandra Daniela Rotaru-Zavaleanu
- Experimental Research Centre for Normal and Pathological Aging, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
- Department of Gastroenterology, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Daniela Calina
- Department of Clinical Pharmacy, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Carmen Valeria Albu
- Department of Neurology, Clinical Hospital of Neuropsychiatry, 200473 Craiova, Romania
| | - Bogdan Catalin
- Experimental Research Centre for Normal and Pathological Aging, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
- Department of Physiology, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
- Correspondence:
| | - Adina Turcu-Stiolica
- Department of Pharmaceutical Management and Marketing, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
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Bitar L, Uphaus T, Thalman C, Muthuraman M, Gyr L, Ji H, Domingues M, Endle H, Groppa S, Steffen F, Koirala N, Fan W, Ibanez L, Heitsch L, Cruchaga C, Lee JM, Kloss F, Bittner S, Nitsch R, Zipp F, Vogt J. Inhibition of the enzyme autotaxin reduces cortical excitability and ameliorates the outcome in stroke. Sci Transl Med 2022; 14:eabk0135. [PMID: 35442704 DOI: 10.1126/scitranslmed.abk0135] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Stroke penumbra injury caused by excess glutamate is an important factor in determining stroke outcome; however, several therapeutic approaches aiming to rescue the penumbra have failed, likely due to unspecific targeting and persistent excitotoxicity, which continued far beyond the primary stroke event. Synaptic lipid signaling can modulate glutamatergic transmission via presynaptic lysophosphatidic acid (LPA) 2 receptors modulated by the LPA-synthesizing molecule autotaxin (ATX) present in astrocytic perisynaptic processes. Here, we detected long-lasting increases in brain ATX concentrations after experimental stroke. In humans, cerebrospinal fluid ATX concentration was increased up to 14 days after stroke. Using astrocyte-specific deletion and pharmacological inhibition of ATX at different time points after experimental stroke, we showed that inhibition of LPA-related cortical excitability improved stroke outcome. In transgenic mice and in individuals expressing a single-nucleotide polymorphism that increased LPA-related glutamatergic transmission, we found dysregulated synaptic LPA signaling and subsequent negative stroke outcome. Moreover, ATX inhibition in the animal model ameliorated stroke outcome, suggesting that this approach might have translational potential for improving the outcome after stroke.
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Affiliation(s)
- Lynn Bitar
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Timo Uphaus
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Carine Thalman
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Muthuraman Muthuraman
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Luzia Gyr
- Transfer Group Anti-Infectives, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knoell Institute, 07745 Jena, Germany
| | - Haichao Ji
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
- Department of Molecular and Translational Neuroscience, Cologne Excellence Cluster for Stress Responses in Aging-Associated Diseases (CECAD), Center for Molecular Medicine Cologne (CMMC), University of Cologne, Faculty of Medicine and University Hospital Cologne, 50937 Cologne, Germany
| | - Micaela Domingues
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Heiko Endle
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
- Department of Molecular and Translational Neuroscience, Cologne Excellence Cluster for Stress Responses in Aging-Associated Diseases (CECAD), Center for Molecular Medicine Cologne (CMMC), University of Cologne, Faculty of Medicine and University Hospital Cologne, 50937 Cologne, Germany
| | - Sergiu Groppa
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Falk Steffen
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Nabin Koirala
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Wei Fan
- Focus Program Translational Neuroscience (FTN), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Laura Ibanez
- Department of Psychiatry, Department of Neurology, NeuroGenomics and Informatics Center, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Laura Heitsch
- Department of Emergency Medicine, Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Carlos Cruchaga
- Department of Psychiatry, Department of Neurology, NeuroGenomics and Informatics Center, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jin-Moo Lee
- Department of Neurology, Radiology, and Biomedical Engineering, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Florian Kloss
- Transfer Group Anti-Infectives, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knoell Institute, 07745 Jena, Germany
| | - Stefan Bittner
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Robert Nitsch
- Institute of Translational Neuroscience, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - Frauke Zipp
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
| | - Johannes Vogt
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany
- Department of Molecular and Translational Neuroscience, Cologne Excellence Cluster for Stress Responses in Aging-Associated Diseases (CECAD), Center for Molecular Medicine Cologne (CMMC), University of Cologne, Faculty of Medicine and University Hospital Cologne, 50937 Cologne, Germany
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Pinto R, Magalhães A, Sousa M, Melo L, Lobo A, Barros P, Gomes JR. Bridging the Transient Intraluminal Stroke Preclinical Model to Clinical Practice: From Improved Surgical Procedures to a Workflow of Functional Tests. Front Neurol 2022; 13:846735. [PMID: 35359638 PMCID: PMC8963503 DOI: 10.3389/fneur.2022.846735] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 02/07/2022] [Indexed: 12/18/2022] Open
Abstract
Acute ischemic stroke (AIS) remains a leading cause of mortality, despite significant advances in therapy (endovascular thrombectomy). Failure in developing novel effective therapies is associated with unsuccessful translation from preclinical studies to clinical practice, associated to inconsistent and highly variable infarct areas and lack of relevant post-stroke functional evaluation in preclinical research. To outreach these limitations, we optimized the intraluminal transient middle cerebral occlusion, a widely used mouse stroke model, in two key parameters, selection of appropriate occlusion filaments and time of occlusion, which show a significant variation in the literature. We demonstrate that commercially available filaments with short coating length (1–2 mm), together with 45-min occlusion, results in a consistent affected brain region, similar to what is observed in most patients with AIS. Importantly, a dedicated post-stroke care protocol, based on clinical practice applied to patients who had stroke, resulted in lower mortality and improved mice welfare. Finally, a battery of tests covering relevant fine motor skills, sensory functions, and learning/memory behaviors revealed a significant effect of tMCAO brain infarction, which is parallel to patient symptomatology as measured by relevant clinical scales (NIH Stroke Scale, NIHSS and modified Rankin Scale, mRS). Thus, in order to enhance translation to clinical practice, future preclinical stroke research must consider the methodology described in this study, which includes improved reproducible surgical procedure, postoperative care, and the battery of functional tests. This will be a major step s closing the gap from bench to bedside, rendering the development of novel effective therapeutic approaches.
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Affiliation(s)
- Raquel Pinto
- Molecular Neurobiology Unit, IBMC-Instituto de Biologia Molecular e Celular, Porto, Portugal.,I3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - Ana Magalhães
- I3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Addiction Biology Unit, IBMC-Instituto de Biologia Molecular e Celular, Porto, Portugal
| | - Mafalda Sousa
- I3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Advanced Light Microscopy Unit, I3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - Lúcia Melo
- Molecular Neurobiology Unit, IBMC-Instituto de Biologia Molecular e Celular, Porto, Portugal.,I3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - Andrea Lobo
- I3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Addiction Biology Unit, IBMC-Instituto de Biologia Molecular e Celular, Porto, Portugal
| | - Pedro Barros
- Neurology Department, Centro Hospitalar de Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal.,Stroke Unit, Centro Hospitalar de Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
| | - João R Gomes
- Molecular Neurobiology Unit, IBMC-Instituto de Biologia Molecular e Celular, Porto, Portugal.,I3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
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Amin N, Du X, Chen S, Ren Q, Hussien AB, Botchway BOA, Hu Z, Fang M. Therapeutic impact of thymoquninone to alleviate ischemic brain injury via Nrf2/HO-1 pathway. Expert Opin Ther Targets 2021; 25:597-612. [PMID: 34236288 DOI: 10.1080/14728222.2021.1952986] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Introduction: Reactive oxygen species (ROS)-mediated inflammation plays a crucial role in ischemic brain injury. Therefore, the activation of the nuclear erythroid 2 related protein and heme-oxygenase-1 (Nrf2/HO-1) pathway by thymoquinone (TQ) could ameliorate ischemic brain damage.Areas covered: The photo-thrombotic method was employed to assess the impact of TQ in attenuating ischemic brain damage in C57BL/6 J mice and thy1-YFP-16 transgenic mice. In vitro study of TQ efficiency to attenuate the oxygen-glucose deprivation/reoxygenation (OGD/R) induced cell death by fluorescence-activated cell sorting (FACs) analysis was also analyzed. The protein expression levels of Nrf2/HO-1, inflammatory, and apoptotic were evaluated by immunofluorescence and western blot techniques. Besides, mRNA expression level of inducible nitric oxide synthase (iNOS), proto-oncogene (c-MYC), proto-oncogene (c-FOS), 5-hydroxytryptamine receptors (5-HT), and autophagy-related 5 (Atg5) were evaluated by RT-qPCR. The dendritic spine density of YFP slices was determined by confocal microscope.Results: Our in vivo and in vitro results indicated that TQ significantly mitigates brain damage and motor dysfunction after ischemic stroke. These observations coincided with curtailed cell death, inflammation, oxidative stress, apoptosis, and autophagy. Most importantly, Nrf2/HO-1 signaling pathway activation by TQ was vital in the modulation of the above processes. Lastly, we found TQ to have minimal toxicity in liver tissue.Conclusion: Our study gives credence to TQ as a promising intervention therapy for cerebral ischemia that decreases inflammation, oxidative stress, and neuronal cell death via the Nrf2/HO-1 pathway, along with modulation of apoptotic and autophagic processes.
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Affiliation(s)
- Nashwa Amin
- Gastroenterology department, Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China.,Department of Zoology, Faculty of Science, Aswan University, Aswan, Egypt.,Institute of Neuroscience, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiaoxue Du
- Translational Medicine Center, Affiliated Hangzhou First People's Hospital, Zhejiang, China
| | - Shijia Chen
- Gastroenterology department, Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China.,Institute of Neuroscience, School of Medicine, Zhejiang University, Hangzhou, China
| | - Qiannan Ren
- Gastroenterology department, Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China.,Institute of Neuroscience, School of Medicine, Zhejiang University, Hangzhou, China
| | - Azhar B Hussien
- Gastroenterology department, Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China.,Institute of Neuroscience, School of Medicine, Zhejiang University, Hangzhou, China
| | - Benson O A Botchway
- Institute of Neuroscience, School of Medicine, Zhejiang University, Hangzhou, China
| | - Zhiying Hu
- Obstetrics & Gynecology Department, Zhejiang Integrated Traditional and Western Medicine Hospital, Hangzhou, China
| | - Marong Fang
- Gastroenterology department, Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China.,Institute of Neuroscience, School of Medicine, Zhejiang University, Hangzhou, China
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Systematic evaluation during early-phase ischemia predicts outcomes in middle cerebral artery occlusion mice. Neuroreport 2020; 32:29-37. [PMID: 33196547 DOI: 10.1097/wnr.0000000000001553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Identifying outcome predictors for ischemic stroke is beneficial for choosing correct intervention protocols. Thus, it is necessary to systemically evaluate histological outcome-associated changes such as hemodynamics, behavior, and body weight during the early phase of ischemia. Here, 50 mice were subjected to 45-min middle cerebral artery occlusion (MCAO) using Longa's method. Hemodynamic changes were monitored by Doppler laser probe, and behaviors were evaluated by scales while the tissues were visualized by staining. The results by correlation analysis demonstrated that with a probe located near the posterior boundary zone of MCA territory, the latency of anoxic depolarization, as well as the cerebral blood flow reduction during MCAO were confirmed to be predictors for the infarct volume on day 3 post-ischemia; histology showed that the risk of a space-occupying secondary hemorrhage was significantly correlated with the increase of infarct volume versus the traditional Bederson's neurological deficit scale, a renewed combined behavioral scoring method performed nicely to reflect the severity of tissue lesions. Weight loss was a valuable metric for the enlargement of both infarct volume and secondary hemorrhage. Monitoring changes during early-phase ischemia may benefit the optimization of ischemia models and the discovery of potential intervention targets.See Video Abstract, http:/links.lww.com/WNR/A601).
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Slow Waves Promote Sleep-Dependent Plasticity and Functional Recovery after Stroke. J Neurosci 2020; 40:8637-8651. [PMID: 33087472 PMCID: PMC7643301 DOI: 10.1523/jneurosci.0373-20.2020] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 09/15/2020] [Accepted: 09/24/2020] [Indexed: 01/13/2023] Open
Abstract
Functional recovery after stroke is associated with a remapping of neural circuits. This reorganization is often associated with low-frequency, high-amplitude oscillations in the peri-infarct zone in both rodents and humans. These oscillations are reminiscent of sleep slow waves (SW) and suggestive of a role for sleep in brain plasticity that occur during stroke recovery; however, direct evidence is missing. Using a stroke model in male mice, we showed that stroke was followed by a transient increase in NREM sleep accompanied by reduced amplitude and slope of ipsilateral NREM sleep SW. We next used 5 ms optical activation of Channelrhodopsin 2-expressing pyramidal neurons, or 200 ms silencing of Archeorhodopsin T-expressing pyramidal neurons, to generate local cortical UP, or DOWN, states, respectively, both sharing similarities with spontaneous NREM SW in freely moving mice. Importantly, we found that single optogenetically evoked SW (SWopto) in the peri-infarct zone, randomly distributed during sleep, significantly improved fine motor movements of the limb corresponding to the sensorimotor stroke lesion site compared with spontaneous recovery and control conditions, while motor strength remained unchanged. In contrast, SWopto during wakefulness had no effect. Furthermore, chronic SWopto during sleep were associated with local axonal sprouting as revealed by the increase of anatomic presynaptic and postsynaptic markers in the peri-infarct zone and corresponding contralesional areas to cortical circuit reorganization during stroke recovery. These results support a role for sleep SW in cortical circuit plasticity and sensorimotor recovery after stroke and provide a clinically relevant framework for rehabilitation strategies using neuromodulation during sleep. SIGNIFICANCE STATEMENT Brain stroke is one of the leading causes of death and major disabilities in the elderly worldwide. A better understanding of the pathophysiological mechanisms underlying spontaneous brain plasticity after stroke, together with an optimization of rehabilitative strategies, are essential to improve stroke treatments. Here, we investigate the role of optogenetically induced sleep slow waves in an animal model of ischemic stroke and identify sleep as a window for poststroke intervention that promotes neuroplasticity and facilitates sensorimotor recovery.
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Huehnchen P, Toyka KV, Gertz K, Endres M, Boehmerle W. Focal brain ischemia in mice does not cause electrophysiological signs of critical illness neuropathy. BMC Res Notes 2020; 13:425. [PMID: 32912287 PMCID: PMC7488231 DOI: 10.1186/s13104-020-05248-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 08/21/2020] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVE Critical illness polyneuropathy (CIP) is a common complication of severe systemic illness treated in intensive care medicine. Ischemic stroke leads to an acute critical injury of the brain with hemiparesis, immunosuppression and subsequent infections, all of which require extended medical treatment. Stroke-induced sarcopenia further contributes to poor rehabilitation and is characterized by muscle wasting and denervation in the paralytic, but also the unaffected limbs. Therefore, we asked whether stroke leads to an additional CIP-like neurodegeneration. RESULTS Focal brain ischemia was induced in adult mice by 60-min middle cerebral artery occlusion (MCAo) following reperfusion and led to functional deficits and marked hemispheric brain atrophy. Nerve conduction function and muscle potentials were measured in the ipsilateral sciatic nerve and gastrocnemius and quadriceps muscle with electroneurography/-myography on days 10, 22, 44 after stroke. An additional crush-injury to the sciatic nerve was included in two sham mice as positive control (sham +). We found no differences in nerve conduction function nor spontaneous electromyographic activity between MCAo and sham animals. Sham + mice developed marked reduction of the motor action potential amplitudes and conduction velocities with pathologic spontaneous activity. In conclusion, we found no peripheral nerve dysfunction/degeneration as signs of a CIP-like phenotype after MCAo.
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Affiliation(s)
- Petra Huehnchen
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Klinik und Hochschulambulanz für Neurologie, 10117, Berlin, Germany.
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Cluster of Excellence NeuroCure, 10117, Berlin, Germany.
- Berlin Institute of Health, Anna-Louisa-Karsch Str. 2, 10178, Berlin, Germany.
| | - Klaus Viktor Toyka
- Department of Neurology, University of Würzburg, 97080, Würzburg, Germany
| | - Karen Gertz
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Klinik und Hochschulambulanz für Neurologie, 10117, Berlin, Germany
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Center for Stroke Resarch Berlin, 10117, Berlin, Germany
| | - Matthias Endres
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Klinik und Hochschulambulanz für Neurologie, 10117, Berlin, Germany
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Cluster of Excellence NeuroCure, 10117, Berlin, Germany
- Berlin Institute of Health, Anna-Louisa-Karsch Str. 2, 10178, Berlin, Germany
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Center for Stroke Resarch Berlin, 10117, Berlin, Germany
- German Center for Neurodegenerative Diseases (DZNE), 10117, Berlin, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Berlin, 10117, Berlin, Germany
| | - Wolfgang Boehmerle
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Klinik und Hochschulambulanz für Neurologie, 10117, Berlin, Germany
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Cluster of Excellence NeuroCure, 10117, Berlin, Germany
- Berlin Institute of Health, Anna-Louisa-Karsch Str. 2, 10178, Berlin, Germany
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10
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Won J, Yi KS, Choi CH, Jeon CY, Seo J, Kim K, Yeo HG, Park J, Kim YG, Jin YB, Koo BS, Lim KS, Lee S, Kim KJ, Choi WS, Park SH, Kim YH, Huh JW, Lee SR, Cha SH, Lee Y. Assessment of Hand Motor Function in a Non-human Primate Model of Ischemic Stroke. Exp Neurobiol 2020; 29:300-313. [PMID: 32921642 PMCID: PMC7492846 DOI: 10.5607/en20023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 08/07/2020] [Accepted: 08/24/2020] [Indexed: 12/12/2022] Open
Abstract
Ischemic stroke results from arterial occlusion and can cause irreversible brain injury. A non-human primate (NHP) model of ischemic stroke was previously developed to investigate its pathophysiology and for efficacy testing of therapeutic candidates; however, fine motor impairment remains to be well-characterized. We evaluated hand motor function in a cynomolgus monkey model of ischemic stroke. Endovascular transient middle cerebral artery occlusion (MCAO) with an angiographic microcatheter induced cerebral infarction. In vivo magnetic resonance imaging mapped and measured the ischemia-induced infarct lesion. In vivo diffusion tensor imaging (DTI) of the stroke lesion to assess the neuroplastic changes and fiber tractography demonstrated three-dimensional patterns in the corticospinal tract 12 weeks after MCAO. The hand dexterity task (HDT) was used to evaluate fine motor movement of upper extremity digits. The HDT was modified for a home cage-based training system, instead of conventional chair restraint training. The lesion was localized in the middle cerebral artery territory, including the sensorimotor cortex. Maximum infarct volume was exhibited over the first week after MCAO, which progressively inhibited ischemic core expansion, manifested by enhanced functional recovery of the affected hand over 12 weeks after MCAO. The total performance time decreased with increasing success rate for both hands on the HDT. Compensatory strategies and retrieval failure improved in the chronic phase after stroke. Our findings demonstrate the recovery of fine motor skill after stroke, and outline the behavioral characteristics and features of functional disorder of NHP stroke model, providing a basis for assessing hand motor function after stroke.
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Affiliation(s)
- Jinyoung Won
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea
| | - Kyung Sik Yi
- Department of Radiology, Chungbuk National University Hospital, Cheongju 28644, Korea
| | - Chi-Hoon Choi
- Department of Radiology, Chungbuk National University Hospital, Cheongju 28644, Korea
| | - Chang-Yeop Jeon
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea
| | - Jincheol Seo
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea
| | - Keonwoo Kim
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea.,School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu 41566, Korea
| | - Hyeon-Gu Yeo
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea.,Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113 Korea
| | - Junghyung Park
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea
| | - Yu Gyeong Kim
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea.,Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113 Korea
| | - Yeung Bae Jin
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea
| | - Bon-Sang Koo
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea
| | - Kyung Seob Lim
- Futuristic Animal Resource & Research Center, KRIBB, Cheongju 28116 Korea
| | - Sangil Lee
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea
| | - Ki Jin Kim
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea
| | - Won Seok Choi
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea
| | - Sung-Hyun Park
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea
| | - Young-Hyun Kim
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea.,Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113 Korea
| | - Jae-Won Huh
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea.,Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113 Korea
| | - Sang-Rae Lee
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea.,Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113 Korea
| | - Sang-Hoon Cha
- Department of Radiology, Chungbuk National University Hospital, Cheongju 28644, Korea
| | - Youngjeon Lee
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju 28116, Korea.,Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113 Korea
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11
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Kinoshita K, Ohtomo R, Takase H, Hamanaka G, Chung KK, Lok J, Katsuki H, Arai K. Different responses after intracerebral hemorrhage between young and early middle-aged mice. Neurosci Lett 2020; 735:135249. [PMID: 32673691 DOI: 10.1016/j.neulet.2020.135249] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 07/10/2020] [Accepted: 07/11/2020] [Indexed: 02/06/2023]
Abstract
Although aging is a major risk factor for intracerebral hemorrhage (ICH), there are very few studies comparing ICH pathology between young and early middle-aged mice. In this study, 8-month old mice (early middle-aged mice) were compared against 2-month old mice (young mice) in neurological and histological changes after ICH induction, such as body weight, lesion volume, astrocytic responses, and motor and cognitive functions. At day 8 after ICH, there was no significant difference in lesion volume between the two groups, and both groups did not exhibit significant cognitive decline, as assessed by spontaneous alternative Y-maze test. On the other hand, 8-month old mice showed delayed recovery from body weight loss, along with reduced astrocytic activation. Interestingly, in the two motor function tests (beam-walking test and corner turn test), 8-month old mice exhibited lower scores only in the beam-walking test, suggesting a partial disturbance in motor recovery after ICH. These results suggest that age-related differences in ICH pathology may already start to appear in early middle-aged brains.
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Affiliation(s)
- Keita Kinoshita
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA; Department of Chemico-Pharmacological Sciences, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Ryo Ohtomo
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA; Department of Neurology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Hajime Takase
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA; Department of Neurosurgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Gen Hamanaka
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Kelly K Chung
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Josephine Lok
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Hiroshi Katsuki
- Department of Chemico-Pharmacological Sciences, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Ken Arai
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA.
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12
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Kim GH, Subash M, Yoon JS, Jo D, Han J, Hong JM, Kim SS, Suh-Kim H. Neurogenin-1 Overexpression Increases the Therapeutic Effects of Mesenchymal Stem Cells through Enhanced Engraftment in an Ischemic Rat Brain. Int J Stem Cells 2020; 13:127-141. [PMID: 31887850 PMCID: PMC7119213 DOI: 10.15283/ijsc19111] [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: 09/26/2019] [Revised: 10/07/2019] [Accepted: 10/08/2019] [Indexed: 12/14/2022] Open
Abstract
Background and Objectives Stem cell therapy is a promising strategy for treating neurological diseases but its effectiveness is influenced by the route of administration and the characteristics of the stem cells. We determined whether neural induction of mesenchymal stem cells (MSCs) was beneficial when the cells were delivered intra-arterially through the carotid artery. Methods and Results MSCs were neurally induced using a retroviral vector expressing the neurogenic transcription factor neurogenin-1 (Ngn1). The LacZ gene encoding bacterial β-galactosidase was used as a control. Ischemic stroke was induced by transluminal occlusion of the middle cerebral artery and 3 days later the MSCs were delivered intra-arterially through the internal carotid artery. Magnetic resonance imaging analysis indicated that compared to MSCs expressing LacZ (MSCs/LacZ), MSCs expressing Ngn1 (MSCs/Ngn1) exhibited increased recruitment to the ischemic region and populated this area for a longer duration. Immunohistochemical analysis indicated that compared to MSCs/LacZ, MSCs/Ngn1 more effectively alleviated neurological dysfunction by blocking secondary damage associated with neuronal cell death and brain inflammation. Microarray and real-time PCR analysis indicated that MSCs/Ngn1 exhibited increased expression of chemotactic cytokine receptors, adherence to endothelial cells, and migration ability. Conclusions Neural induction with Ngn1 increases the homing ability of MSCs, enhancing their engraftment efficiency in the ischemic rat brain. Intra-arterial delivery of neurally induced MSCs/Ngn1 3 days after ischemic injury blocks neuronal cell death and inflammation, and improves functional recovery. Thus, intra-arterial administration of stem cells with neural properties may be a novel therapy for the treatment of ischemic stroke.
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Affiliation(s)
- Gyu-Hee Kim
- Department of Anatomy, Ajou University School of Medicine, Suwon, Korea.,Department of Biomedical Sciences, Ajou Graduate School, Suwon, Korea
| | - Marasini Subash
- Department of Anatomy, Ajou University School of Medicine, Suwon, Korea.,Department of Biomedical Sciences, Ajou Graduate School, Suwon, Korea
| | - Jeong Seon Yoon
- Department of Anatomy, Ajou University School of Medicine, Suwon, Korea
| | - Darong Jo
- Department of Biomedical Sciences, Ajou Graduate School, Suwon, Korea.,Research Center CelleBrain Ltd., Jeonju, Korea
| | - Jihun Han
- Department of Anatomy, Ajou University School of Medicine, Suwon, Korea.,Department of Biomedical Sciences, Ajou Graduate School, Suwon, Korea
| | - Ji Man Hong
- Department of Biomedical Sciences, Ajou Graduate School, Suwon, Korea.,Department of Neurology, Ajou University School of Medicine, Suwon, Korea
| | - Sung-Soo Kim
- Department of Anatomy, Ajou University School of Medicine, Suwon, Korea
| | - Haeyoung Suh-Kim
- Department of Anatomy, Ajou University School of Medicine, Suwon, Korea.,Department of Biomedical Sciences, Ajou Graduate School, Suwon, Korea.,Research Center CelleBrain Ltd., Jeonju, Korea
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13
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Calahorra J, Shenk J, Wielenga VH, Verweij V, Geenen B, Dederen PJ, Peinado MÁ, Siles E, Wiesmann M, Kiliaan AJ. Hydroxytyrosol, the Major Phenolic Compound of Olive Oil, as an Acute Therapeutic Strategy after Ischemic Stroke. Nutrients 2019; 11:E2430. [PMID: 31614692 PMCID: PMC6836045 DOI: 10.3390/nu11102430] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 10/01/2019] [Accepted: 10/02/2019] [Indexed: 12/17/2022] Open
Abstract
Stroke is one of the leading causes of adult disability worldwide. After ischemic stroke, damaged tissue surrounding the irreversibly damaged core of the infarct, the penumbra, is still salvageable and is therefore a target for acute therapeutic strategies. The Mediterranean diet (MD) has been shown to lower stroke risk. MD is characterized by increased intake of extra-virgin olive oil, of which hydroxytyrosol (HT) is the foremost phenolic component. This study investigates the effect of an HT-enriched diet directly after stroke on regaining motor and cognitive functioning, MRI parameters, neuroinflammation, and neurogenesis. Stroke mice on an HT diet showed increased strength in the forepaws, as well as improved short-term recognition memory probably due to improvement in functional connectivity (FC). Moreover, mice on an HT diet showed increased cerebral blood flow (CBF) and also heightened expression of brain derived neurotrophic factor (Bdnf), indicating a novel neurogenic potential of HT. This result was additionally accompanied by an enhanced transcription of the postsynaptic marker postsynaptic density protein 95 (Psd-95) and by a decreased ionized calcium-binding adapter molecule 1 (IBA-1) level indicative of lower neuroinflammation. These results suggest that an HT-enriched diet could serve as a beneficial therapeutic approach to attenuate ischemic stroke-associated damage.
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Affiliation(s)
- Jesús Calahorra
- Department of Experimental Biology, University of Jaén, Campus Las Lagunillas s/n, 23071 Jaén, Spain.
| | - Justin Shenk
- Radboud University Medical Center, Donders Institute for Brain, Cognition & Behaviour, Radboud Alzheimer Center, Department of Anatomy, Preclinical Imaging Centre PRIME, 6500 HB Nijmegen, The Netherlands.
| | - Vera H Wielenga
- Radboud University Medical Center, Donders Institute for Brain, Cognition & Behaviour, Radboud Alzheimer Center, Department of Anatomy, Preclinical Imaging Centre PRIME, 6500 HB Nijmegen, The Netherlands.
| | - Vivienne Verweij
- Radboud University Medical Center, Donders Institute for Brain, Cognition & Behaviour, Radboud Alzheimer Center, Department of Anatomy, Preclinical Imaging Centre PRIME, 6500 HB Nijmegen, The Netherlands.
| | - Bram Geenen
- Radboud University Medical Center, Donders Institute for Brain, Cognition & Behaviour, Radboud Alzheimer Center, Department of Anatomy, Preclinical Imaging Centre PRIME, 6500 HB Nijmegen, The Netherlands.
| | - Pieter J Dederen
- Radboud University Medical Center, Donders Institute for Brain, Cognition & Behaviour, Radboud Alzheimer Center, Department of Anatomy, Preclinical Imaging Centre PRIME, 6500 HB Nijmegen, The Netherlands.
| | - M Ángeles Peinado
- Department of Experimental Biology, University of Jaén, Campus Las Lagunillas s/n, 23071 Jaén, Spain.
| | - Eva Siles
- Department of Experimental Biology, University of Jaén, Campus Las Lagunillas s/n, 23071 Jaén, Spain.
| | - Maximilian Wiesmann
- Radboud University Medical Center, Donders Institute for Brain, Cognition & Behaviour, Radboud Alzheimer Center, Department of Anatomy, Preclinical Imaging Centre PRIME, 6500 HB Nijmegen, The Netherlands.
| | - Amanda J Kiliaan
- Radboud University Medical Center, Donders Institute for Brain, Cognition & Behaviour, Radboud Alzheimer Center, Department of Anatomy, Preclinical Imaging Centre PRIME, 6500 HB Nijmegen, The Netherlands.
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14
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Hanne NJ, Steward AJ, Sessions MR, Thornburg HL, Sheng H, Cole JH. Stroke Prevents Exercise-induced Gains in Bone Microstructure But Not Composition in Mice. J Biomech Eng 2019; 141:1065456. [PMID: 31596925 DOI: 10.1115/1.4045113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Indexed: 11/08/2022]
Abstract
Ischemic stroke induces rapid loss in bone mineral density up to 13 times greater than during normal aging, leading to markedly increased risk of fracture. Little is known about skeletal changes following stroke beyond density loss. In this study we use a mild-moderate middle cerebral artery occlusion model to determine the effects of ischemic stroke without bedrest on bone microstructure, dynamic bone formation, and tissue composition. Twenty-seven 12-week-old male C57Bl/6J mice received either a stroke or sham surgery and then either received daily treadmill exercise or remained sedentary for four weeks. All mice were ambulatory immediately following stroke, and limb coordination during treadmill exercise was unaffected by stroke, indicating similar mechanical loading across limbs for surgery groups. Stroke did not directly detriment microstructure, but exercise only stimulated adaptation in sham group, not stroke group, with increased bone volume fraction and trabecular thickness in the sham distal femoral metaphysis. Stroke differentially decreased cortical area in the affected limb relative to the unaffected limb of the distal femoral metaphysis, and endosteal bone formation rate in the affected tibial diaphysis. Although exercise failed to improve bone microstructure following stroke, exercise increased mineral-to-matrix content in stroke but not sham. Together, these results show that stroke inhibits exercise-induced changes to femoral microstructure but not tibial composition, even without changes to gait. Similarly, affected-unaffected limb differences in cortical bone structure and bone formation rate in ambulatory mice show that stroke affects bone health even without bedrest.
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Affiliation(s)
- Nicholas J Hanne
- Joint Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC, and North Carolina State University, Raleigh, NC, USA; 4130 Engineering Building III, Campus Box 7115, Raleigh, NC 27695-7115
| | - Andrew J Steward
- Joint Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC, and North Carolina State University, Raleigh, NC, USA; 4130 Engineering Building III, Campus Box 7115, Raleigh, NC 27695-7115
| | - Marci R Sessions
- Joint Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC, and North Carolina State University, Raleigh, NC, USA; 4130 Engineering Building III, Campus Box 7115, Raleigh, NC 27695-7115
| | - Hannah L Thornburg
- Joint Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC, and North Carolina State University, Raleigh, NC, USA; 4130 Engineering Building III, Campus Box 7115, Raleigh, NC 27695-7115
| | - Huaxin Sheng
- Department of Anesthesiology, Duke University Medical Center, Durham, NC, USA; P. O. Box 3094, Durham, NC 27710
| | - Jacqueline H Cole
- Joint Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC, and North Carolina State University, Raleigh, NC, USA; 4130 Engineering Building III, Campus Box 7115, Raleigh, NC 27695-7115
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15
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Li Q, Wu X, Yang Y, Zhang Y, He F, Xu X, Zhang Z, Tao L, Luo C. Tachykinin NK1 receptor antagonist L-733,060 and substance P deletion exert neuroprotection through inhibiting oxidative stress and cell death after traumatic brain injury in mice. Int J Biochem Cell Biol 2018; 107:154-165. [PMID: 30593954 DOI: 10.1016/j.biocel.2018.12.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 12/22/2018] [Accepted: 12/25/2018] [Indexed: 01/16/2023]
Abstract
Substance P (SP) is believed to play a role in traumatic brain injury (TBI), and the inhibition of binding of SP to the tachykinin neurokinin-1 receptor (NK1R) using NK1R antagonists had made favorable effects on TBI. Our current study addresses the functional roles and underlying mechanisms of SP and NK1R antagonist L-733,060 following TBI. Adult male wild type C57BL/6 J and SP knock out (SPKO) mice received a controlled cortical impact and outcome parameters were assessed. The results showed that TBI-induced motor and spatial memory deficits, lesion volume, brain water content and blood-brain barrier disruption were alleviated both in L-733,060-treated C57BL/6 J mice and vehicle-treated SPKO mice. L-733,060 treatment and SP deletion inhibited TBI-induced the release of cytochrome c from mitochondria to cytoplasm, activation of caspase-3, oxidative stress and neuroinflammation. Higher SP levels in serum and cortex were observed in wild type mice undergoing TBI relative to wild type sham group, but very little expression of cortical SP was detected in the SP-/- mice either TBI or not. Upregulation of NK1R expression after TBI was observed, and there was no significant difference between wild type and SPKO groups. in vitro, L-733,060 and SP deletion inhibited scratch injury-induced cell death, loss of mitochondrial membrane potential and reactive oxygen species (ROS) production following TBI. Together, the results of this study implicate a functional role for NK1-R antagonist L-733,060 and deletion of SP in TBI-induced neurological outcome, oxidative damage, neuroinflammation and cell death. Upregulation of NK1R maybe a consequence of TBI, independent of the levels of substance P. This study raises the possibility that targeting SP through its receptor NK1R or genetic deletion may have therapeutic efficacy in TBI.
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Affiliation(s)
- Qianqian Li
- School of Forensic Medicine, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Xiao Wu
- School of Forensic Medicine, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Yanyan Yang
- School of Forensic Medicine, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Yue Zhang
- School of Forensic Medicine, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Fang He
- School of Forensic Medicine, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Xiang Xu
- School of Forensic Medicine, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Ziwei Zhang
- School of Forensic Medicine, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Luyang Tao
- Department of Forensic Medicine, Medical College of Soochow University, Suzhou, 215123, Jiangsu, China
| | - Chengliang Luo
- Department of Forensic Medicine, Medical College of Soochow University, Suzhou, 215123, Jiangsu, China.
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16
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Fréchou M, Margaill I, Marchand-Leroux C, Beray-Berthat V. Behavioral tests that reveal long-term deficits after permanent focal cerebral ischemia in mouse. Behav Brain Res 2018; 360:69-80. [PMID: 30500429 DOI: 10.1016/j.bbr.2018.11.040] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 11/26/2018] [Accepted: 11/26/2018] [Indexed: 01/10/2023]
Abstract
Efforts are still needed regarding the research of therapeutics for ischemic stroke. While in experimental studies the protective effect of pharmacological agents is often highlighted by a reduction of the lesion size evaluated in the short term (days), in clinical studies a functional recovery of patients suffering from stroke is expected on the long-term (months and years). Long-term functional preclinical studies are highly recommended to evaluate potential neuroprotective agents for stroke, rather than an assessment of the infarction size at a short time point. The present study thus aimed to select among various behavioral tests those able to highlight long-term deficits (3 months) after cerebral ischemia in mice. Permanent focal cerebral ischemia was carried out in male Swiss mice by intraluminal occlusion of the left middle cerebral artery (MCA). Fourteen behavioral tests were assessed from 7 days to 90 days after ischemia (locomotor activity, neurological score, exit circle test, grip and string tests, chimney test, adhesive removal test, pole test, beam-walking tests, elevated plus maze, marble burying test, forced swimming test, novel object recognition test). The present study clearly identified a battery of behavioral tests able to highlight deficits up to 3 months in our mouse model of permanent MCA occlusion (locomotor activity, neurological score, adhesive removal test, pole test, beam-walking tests, elevated plus maze, marble burying test, forced swimming test and novel object recognition test). This battery of behavioral tests highlighting long-term deficits is useful to study future neuroprotective strategies for stroke treatment.
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Affiliation(s)
- Magalie Fréchou
- Equipe de recherche "Pharmacologie de la Circulation Cérébrale" EA 4475, Université Paris Descartes, Sorbonne Paris Cité, Faculté de Pharmacie de Paris, 75006 Paris, France.
| | - Isabelle Margaill
- Equipe de recherche "Pharmacologie de la Circulation Cérébrale" EA 4475, Université Paris Descartes, Sorbonne Paris Cité, Faculté de Pharmacie de Paris, 75006 Paris, France.
| | - Catherine Marchand-Leroux
- Equipe de recherche "Pharmacologie de la Circulation Cérébrale" EA 4475, Université Paris Descartes, Sorbonne Paris Cité, Faculté de Pharmacie de Paris, 75006 Paris, France.
| | - Virginie Beray-Berthat
- Equipe de recherche "Pharmacologie de la Circulation Cérébrale" EA 4475, Université Paris Descartes, Sorbonne Paris Cité, Faculté de Pharmacie de Paris, 75006 Paris, France.
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17
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Lina RN, Rahmadi M, Khotib J. Erythropoietin Restores Motor Functions through Angiogenesis in the Thalamus Area of Ischemic Stroke in Rats. FOLIA MEDICA INDONESIANA 2018. [DOI: 10.20473/fmi.v54i3.10011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The present study aimed to determine the potency of erythropoietin as angiogenesis inducer in ischemic stroke rats model. Animal model was treated by right unilateral common carotid artery occlusion (rUCCAO) for 90 minutes. The stroke model produced decreased motor function. Eight to 12 week-old Wistar rats were used. rHuEPO was administered for 7 days, starting at 24 hours after stroke induction. Motor functions were measured before and 1, 3 and 7 days after rUCCAO. Whereas, histological damage and VEGF expression were evaluated at day 14. The results showed that rHuEPO significantly increased motor function on day 7, reduced the number of damaged body cell and increased VEGF expression in the thalamus area on day 14. As a conclusion, rHuEPO may restore the motoric function and prevent brain neuronal death by inducing angiogenesis through the increase in the expression of VEGF in rUCCAO-induced ischemic stroke model.
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18
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Schosserer M, Banks G, Dogan S, Dungel P, Fernandes A, Marolt Presen D, Matheu A, Osuchowski M, Potter P, Sanfeliu C, Tuna BG, Varela-Nieto I, Bellantuono I. Modelling physical resilience in ageing mice. Mech Ageing Dev 2018; 177:91-102. [PMID: 30290161 PMCID: PMC6445352 DOI: 10.1016/j.mad.2018.10.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 09/12/2018] [Accepted: 10/01/2018] [Indexed: 02/06/2023]
Abstract
Geroprotectors, a class of drugs targeting multiple deficits occurring with age, necessitate the development of new animal models to test their efficacy. The COST Action MouseAGE is a European network whose aim is to reach consensus on the translational path required for geroprotectors, interventions targeting the biology of ageing. In our previous work we identified frailty and loss of resilience as a potential target for geroprotectors. Frailty is the result of an accumulation of deficits, which occurs with age and reduces the ability to respond to adverse events (physical resilience). Modelling frailty and physical resilience in mice is challenging for many reasons. There is no consensus on the precise definition of frailty and resilience in patients or on how best to measure it. This makes it difficult to evaluate available mouse models. In addition, the characterization of those models is poor. Here we review potential models of physical resilience, focusing on those where there is some evidence that the administration of acute stressors requires integrative responses involving multiple tissues and where aged mice showed a delayed recovery or a worse outcome then young mice in response to the stressor. These models include sepsis, trauma, drug- and radiation exposure, kidney and brain ischemia, exposure to noise, heat and cold shock.
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Affiliation(s)
- Markus Schosserer
- University of Natural Resources and Life Sciences, Vienna, Department of Biotechnology, Vienna, Austria
| | - Gareth Banks
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell Campus, Oxfordshire, OX11 0RD, United Kingdom
| | - Soner Dogan
- Department of Medical Biology, School of Medicine, Yeditepe University, Istanbul, Turkey
| | - Peter Dungel
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Center, Vienna, Austria
| | - Adelaide Fernandes
- Neuron-Glia Biology in Health and Disease, iMed.ULisboa, Research Institute for Medicines, Department of Biochemistry and Human Biology, Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - Darja Marolt Presen
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Center, Vienna, Austria
| | - Ander Matheu
- Oncology Department, Biodonostia Research Institute, San Sebastián, Spain
| | - Marcin Osuchowski
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Center, Vienna, Austria
| | - Paul Potter
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell Campus, Oxfordshire, OX11 0RD, United Kingdom
| | - Coral Sanfeliu
- Institute of Biomedical Research of Barcelona (IIBB) CSIC, IDIBAPS, CIBERESP, Barcelona, Spain
| | - Bilge Guvenc Tuna
- Department of Medical Biophysics, School of Medicine, Yeditepe University, Istanbul, Turkey
| | | | - Ilaria Bellantuono
- MRC/Arthritis Research-UK Centre for Integrated Research into Musculoskeletal Ageing (CIMA), Department of Oncology and Metabolism, The Medical School, Beech Hill Road, Sheffield, S10 2RX, United Kingdom.
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Song H, Mylvaganam SM, Wang J, Mylvaganam SMK, Wu C, Carlen PL, Eubanks JH, Feng J, Zhang L. Contributions of the Hippocampal CA3 Circuitry to Acute Seizures and Hyperexcitability Responses in Mouse Models of Brain Ischemia. Front Cell Neurosci 2018; 12:278. [PMID: 30210302 PMCID: PMC6123792 DOI: 10.3389/fncel.2018.00278] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 08/08/2018] [Indexed: 12/29/2022] Open
Abstract
The hippocampal circuitry is widely recognized as susceptible to ischemic injury and seizure generation. However, hippocampal contribution to acute non-convulsive seizures (NCS) in models involving middle cerebral artery occlusion (MCAO) remains to be determined. To address this, we occluded the middle cerebral artery in adult C57 black mice and monitored electroencephalographic (EEG) discharges from hippocampal and neocortical areas. Electrographic discharges in the absence of convulsive motor behaviors were observed within 90 min following occlusion of the middle cerebral artery. Hippocampal discharges were more robust than corresponding cortical discharges in all seizure events examined, and hippocampal discharges alone or with minimal cortical involvement were also observed in some seizure events. Seizure development was associated with ipsilateral hippocampal injuries as determined by subsequent histological examinations. We also introduced hypoxia-hypoglycemia episodes in mouse brain slices and examined regional hyperexcitable responses ex vivo. Extracellular recordings showed that the hippocampal CA3 region had a greater propensity for exhibiting single/multiunit activities or epileptiform field potentials following hypoxic-hypoglycemic (HH) episodes compared to the CA1, dentate gyrus, entorhinal cortical (EC) or neocortical regions. Whole-cell recordings revealed that CA3 pyramidal neurons exhibited excessive excitatory postsynaptic currents, attenuated inhibitory postsynaptic currents and intermittent or repetitive spikes in response to HH challenge. Together, these observations suggest that hippocampal discharges, possibly as a result of CA3 circuitry hyperexcitability, are a major component of acute NCS in a mouse model of MCAO.
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Affiliation(s)
- Hongmei Song
- Krembil Research Institute, University Health Network, Toronto, ON, Canada
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China
| | | | - Justin Wang
- Krembil Research Institute, University Health Network, Toronto, ON, Canada
| | | | - Chiping Wu
- Krembil Research Institute, University Health Network, Toronto, ON, Canada
| | - Peter L. Carlen
- Krembil Research Institute, University Health Network, Toronto, ON, Canada
- Department of Medicine (Neurology), University of Toronto, Toronto, ON, Canada
- Department of Physiology, University of Toronto, Toronto, ON, Canada
| | - James H. Eubanks
- Krembil Research Institute, University Health Network, Toronto, ON, Canada
- Department of Surgery (Neurosurgery), University of Toronto, Toronto, ON, Canada
| | - Jiachun Feng
- Department of Neurology, The First Hospital of Jilin University, Changchun, China
| | - Liang Zhang
- Krembil Research Institute, University Health Network, Toronto, ON, Canada
- Department of Medicine (Neurology), University of Toronto, Toronto, ON, Canada
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20
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Ramli Y, Alwahdy AS, Kurniawan M, Juliandi B, Wuyung PE, Susanto YD. Permanent flame-blunted monofilament of middle cerebral artery occlusion technique for ischemia stroke induction in animal models. MEDICAL JOURNAL OF INDONESIA 2017. [DOI: 10.13181/mji.v26i3.1645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
Background: Rat is the most frequently used animal for ischemic stroke studies. Recently, middle cerebral artery occlusion (MCAO) by introducing various types of surgical monofilament intraluminally has been widely used, with their advantages and disadvantages. For permanent occlusion, problems with mortality in rats are higher than transient. In this study, we used permanent occlusion using modified monofilament by flaming on its tip which may reduce mortality rate, so that chronic phase of stroke can be learned extensively.Methods: Three male Sprague-Dawley rats underwent permanent MCAO. The flame-blunted monofilament was introduced through common carotid artery. Hematoxylin eosin histopathology confirmation and functional assessment post-stroke induction were then evaluated.Results: Evaluation was conducted on 3 rats in different time post-stroke induction (48 hours, 72 hours, and 3 weeks). Using histopathological examination, the infarction was proved in all 3 rats showing red neurons, perivascular edema and neutrophil spongiosis, in infarct and peri-infarct area. The changes in histopathology showed spongiosis were more dominant in 3 week-post-MCAO rats. On the other hand, red neurons and perivascular edema were less compared to 48 and 72-hour-post-MCAO rats.Conclusion: Flame–blunted monofilament showed its efficacy in producing infarct area. The advantages of this technique are easy to perform with simple and less expensive modification of the monofilament. Conducting successful permanent occlusion with less mortality rate will give chances to do further research on stroke in chronic phase and its effect on novel treatment.
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21
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Takase H, Kurihara Y, Yokoyama TA, Kawahara N, Takei K. LOTUS overexpression accelerates neuronal plasticity after focal brain ischemia in mice. PLoS One 2017; 12:e0184258. [PMID: 28880879 PMCID: PMC5589167 DOI: 10.1371/journal.pone.0184258] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 08/20/2017] [Indexed: 01/13/2023] Open
Abstract
Nogo receptor-1 (NgR1) and its ligands inhibit neuronal plasticity and limit functional recovery after brain damage such as ischemic stroke. We have previously shown that lateral olfactory tract usher substance (LOTUS) antagonizes NgR1-mediated signaling. Here, we investigated whether LOTUS enhances neuronal plasticity and functional recovery after brain focal ischemia in adult mice. Focal ischemic infarcts were induced in wild-type and LOTUS-overexpressing transgenic mice via middle cerebral artery occlusion. Endogenous LOTUS expression was increased in brain and cervical spinal cord of the contralateral side of ischemia in the chronic phase after brain ischemia. LOTUS overexpression accelerated midline-crossing axonal sprouting from the contralateral side to the ipsilateral side of ischemia in the medullar reticular formation and gray matter of denervated cervical spinal cord. Importantly, LOTUS overexpression improved neurological score highly correlated with laterality ratio of corticoreticular fibers of the medulla oblongata, indicating that LOTUS overexpression may overcome the inhibitory environment induced by NgR1 signaling for damaged motor pathway reconstruction after ischemic stroke. Thus, our data suggest that LOTUS overexpression accelerates neuronal plasticity in the brainstem and cervical spinal cord after stroke and LOTUS administration is useful for future therapeutic strategies.
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Affiliation(s)
- Hajime Takase
- Department of Neurosurgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan
- Molecular Medical Bioscience Laboratory, Department of Medical Life Science, Yokohama City University Graduate School of Medical Life Science, Yokohama, Japan
| | - Yuji Kurihara
- Molecular Medical Bioscience Laboratory, Department of Medical Life Science, Yokohama City University Graduate School of Medical Life Science, Yokohama, Japan
| | - Taka-akira Yokoyama
- Department of Neurosurgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan
- Molecular Medical Bioscience Laboratory, Department of Medical Life Science, Yokohama City University Graduate School of Medical Life Science, Yokohama, Japan
| | - Nobutaka Kawahara
- Department of Neurosurgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan
- * E-mail: (KT); (NK)
| | - Kohtaro Takei
- Molecular Medical Bioscience Laboratory, Department of Medical Life Science, Yokohama City University Graduate School of Medical Life Science, Yokohama, Japan
- * E-mail: (KT); (NK)
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22
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High-mobility group box-1 as an autocrine trophic factor in white matter stroke. Proc Natl Acad Sci U S A 2017; 114:E4987-E4995. [PMID: 28584116 DOI: 10.1073/pnas.1702035114] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Maintenance of white matter integrity in health and disease is critical for a variety of neural functions. Ischemic stroke in the white matter frequently results in degeneration of oligodendrocytes (OLs) and myelin. Previously, we found that toll-like receptor 2 (TLR2) expressed in OLs provides cell-autonomous protective effects on ischemic OL death and demyelination in white matter stroke. Here, we identified high-mobility group box-1 (HMGB1) as an endogenous TLR2 ligand that promotes survival of OLs under ischemic stress. HMGB1 rapidly accumulated in the culture medium of OLs exposed to oxygen-glucose deprivation (OGD). This conditioned medium exhibited a protective activity against ischemic OL death that was completely abolished by immunodepletion of HMGB1. Knockdown of HMGB1 or application of glycyrrhizin, a specific HMGB1 inhibitor, aggravated OGD-induced OL death, and recombinant HMGB1 application reduced the extent of OL death in a TLR2-dependent manner. We confirmed that cytosolic translocation of HMGB1 and activation of TLR2-mediated signaling pathways occurred in a focal white matter stroke model induced by endothelin-1 injection. Animals with glycyrrhizin coinjection showed an expansion of the demyelinating lesion in a TLR2-dependent manner, accompanied by aggravation of sensorimotor behavioral deficits. These results indicate that HMGB1/TLR2 activates an autocrine trophic signaling pathways in OLs and myelin to maintain structural and functional integrity of the white matter under ischemic conditions.
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23
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Caballero-Garrido E, Pena-Philippides JC, Galochkina Z, Erhardt E, Roitbak T. Characterization of long-term gait deficits in mouse dMCAO, using the CatWalk system. Behav Brain Res 2017; 331:282-296. [PMID: 28549648 DOI: 10.1016/j.bbr.2017.05.042] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 05/11/2017] [Accepted: 05/17/2017] [Indexed: 01/06/2023]
Abstract
Evaluation of functional outcome is widely used across species to assess the recovery process following various pathological conditions, including spinal cord injury, musculo-skeletal injury, mithochondrial disease, neuropathic cancer, Huntington's disease, chronic pain, cortical lesion, and olivocerebellar degeneration among others. The Stroke Therapy Academic Industry Roundtable (STAIR) recommends multiple endpoints for behavioral studies in pre-clinical stroke research, to demonstrate their clinical relevance. One of the more challenging tasks in experimental stroke research is measuring long-term functional outcome in mice. It is, however, becoming more important, since transgenic mice are increasingly used for modeling human neurological disorders. Using CatWalk, we characterized long-lasting gait/locomotion deficits following mouse distal middle cerebral artery occlusion (dMCAO). The post-dMCAO assessment was performed at 7, 14, 21, and 28days after experimental ischemia. When compared to sham-operated mice, dMCAO animals displayed a statistically significant decrease in Spatial parameters (such as Paw Area), while the Temporal parameters (Stand, Initial and Terminal Dual Stances) were significantly increased for three weeks after surgery. Kinetic parameters were significantly decreased in dMCAO animals at 7days after dMCAO. The Interlimb coordination group of parameters displayed the strongest deficits at 21days. While CatWalk variables were altered in all paws, the degree of change was greatest for the parameters measured from the Right Front Paw (contralateral to the lesion). All parameters measured in dMCAO and Sham-operated groups reached similar levels at four weeks after the experimental insult, which reflects a spontaneous post-ischemic recovery. Based on our investigation, we conclude that CatWalk represents a relevant and sensitive analysis, which allows long-term characterization of animal functional recovery in the dMCAO model of experimental ischemia.
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Affiliation(s)
- E Caballero-Garrido
- Department of Neurosurgery, University of New Mexico Health Sciences Center Albuquerque, NM, USA.
| | - J C Pena-Philippides
- Department of Neurosurgery, University of New Mexico Health Sciences Center Albuquerque, NM, USA
| | - Z Galochkina
- Department of Mathematics and Statistics, University of New Mexico, Albuquerque, NM 87131, USA
| | - E Erhardt
- Department of Mathematics and Statistics, University of New Mexico, Albuquerque, NM 87131, USA
| | - T Roitbak
- Department of Neurosurgery, University of New Mexico Health Sciences Center Albuquerque, NM, USA
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24
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Morris GP, Wright AL, Tan RP, Gladbach A, Ittner LM, Vissel B. A Comparative Study of Variables Influencing Ischemic Injury in the Longa and Koizumi Methods of Intraluminal Filament Middle Cerebral Artery Occlusion in Mice. PLoS One 2016; 11:e0148503. [PMID: 26870954 PMCID: PMC4752454 DOI: 10.1371/journal.pone.0148503] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2015] [Accepted: 01/19/2016] [Indexed: 12/19/2022] Open
Abstract
The intraluminal filament model of middle cerebral artery occlusion (MCAO) in mice and rats has been plagued by inconsistency, owing in part to the multitude of variables requiring control. In this study we investigated the impact of several major variables on survival rate, lesion volume, neurological scores, cerebral blood flow (CBF) and body weight including filament width, time after reperfusion, occlusion time and the choice of surgical method. Using the Koizumi method, we found ischemic injury can be detected as early as 30 min after reperfusion, to a degree that is not statistically different from 24 h post-perfusion, using 2,3,5-Triphenyltetrazolium chloride (TTC) staining. We also found a distinct increase in total lesion volume with increasing occlusion time, with 30–45 min a critical time for the development of large, reproducible lesions. Furthermore, although we found no significant difference in total lesion volume generated by the Koizumi and Longa methods of MCAO, nor were survival rates appreciably different between the two at 4 h after reperfusion, the Longa method produces significantly greater reperfusion. Finally, we found no statistical evidence to support the exclusion of data from animals experiencing a CBF reduction of <70% in the MCA territory following MCAO, using laser-Doppler flowmetry. Instead we suggest the main usefulness of laser-Doppler flowmetry is for guiding filament placement and the identification of subarachnoid haemorrhages and premature reperfusion. In summary, this study provides detailed evaluation of the Koizumi method of intraluminal filament MCAO in mice and a direct comparison to the Longa method.
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Affiliation(s)
- Gary P Morris
- Neurodegenerative Disorders, Garvan Institute of Medical Research, Sydney, Australia.,Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Amanda L Wright
- Neurodegenerative Disorders, Garvan Institute of Medical Research, Sydney, Australia
| | - Richard P Tan
- Neurodegenerative Disorders, Garvan Institute of Medical Research, Sydney, Australia.,Heart Research Institute, 2042 New South Wales, Sydney, Australia
| | - Amadeus Gladbach
- Dementia Research Unit, Department of Anatomy, School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Lars M Ittner
- Dementia Research Unit, Department of Anatomy, School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, Australia.,Neuroscience Research Australia, Sydney, Australia
| | - Bryce Vissel
- Neurodegenerative Disorders, Garvan Institute of Medical Research, Sydney, Australia.,Faculty of Medicine, University of New South Wales, Sydney, Australia.,Faculty of Science, University of Technology Sydney, Sydney, Australia
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25
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Lee S, Yang M, Kim J, Son Y, Kim J, Kang S, Ahn W, Kim SH, Kim JC, Shin T, Wang H, Moon C. Involvement of BDNF/ERK signaling in spontaneous recovery from trimethyltin-induced hippocampal neurotoxicity in mice. Brain Res Bull 2016; 121:48-58. [PMID: 26772626 DOI: 10.1016/j.brainresbull.2016.01.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 12/28/2015] [Accepted: 01/04/2016] [Indexed: 11/17/2022]
Abstract
Trimethyltin (TMT) toxicity causes histopathological damage in the hippocampus and induces seizure behaviors in mice. The lesions and symptoms recover spontaneously over time; however, little is known about the precise mechanisms underlying this recovery from TMT toxicity. We investigated changes in the brain-derived neurotrophic factor/extracellular signal-regulated kinases (BDNF/ERK) signaling pathways in the mouse hippocampus following TMT toxicity. Mice (7 weeks old, C57BL/6) administered TMT (2.6 mg/kg intraperitoneally) showed acute and severe neurodegeneration with increased TUNEL-positive cells in the dentate gyrus (DG) of the hippocampus. The mRNA and protein levels of BDNF in the hippocampus were elevated by TMT treatment. Immunohistochemical analysis showed that TMT treatment markedly increased phosphorylated ERK1/2 expression in the mouse hippocampus 1-4 days after TMT treatment, although the intensity of ERK immunoreactivity in mossy fiber decreased at 1-8 days post-treatment. In addition, ERK-immunopositive cells were localized predominantly in doublecortin-positive immature progenitor neurons in the DG. In primary cultured immature hippocampal neurons (4 days in vitro), BDNF treatment alleviated TMT-induced neurotoxicity, via activation of the ERK signaling pathway. Thus, we suggest that BDNF/ERK signaling pathways may be associated with cell differentiation and survival of immature progenitor neurons, and will eventually lead to spontaneous recovery in TMT-induced hippocampal neurodegeneration.
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Affiliation(s)
- Sueun Lee
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju 500-757, South Korea
| | - Miyoung Yang
- Department of Anatomy, School of Medicine, Wonkwang University, Iksan, Jeonbuk 570-740, South Korea
- Department of Physiology and Neuroscience Program, Michigan State University, East Lansing, MI 48824, USA
| | - Juhwan Kim
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju 500-757, South Korea
| | - Yeonghoon Son
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju 500-757, South Korea
| | - Jinwook Kim
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju 500-757, South Korea
| | - Sohi Kang
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju 500-757, South Korea
| | - Wooseok Ahn
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju 500-757, South Korea
| | - Sung-Ho Kim
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju 500-757, South Korea
| | - Jong-Choon Kim
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju 500-757, South Korea
| | - Taekyun Shin
- College of Veterinary Medicine, Jeju National University, Jeju 690-756, South Korea
| | - Hongbing Wang
- Department of Physiology and Neuroscience Program, Michigan State University, East Lansing, MI 48824, USA
| | - Changjong Moon
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju 500-757, South Korea
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26
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Abstract
A multifunctional microRNA, miR-155, has been recently recognized as an important modulator of numerous biological processes. In our previous in vitro studies, miR-155 was identified as a potential regulator of the endothelial morphogenesis. The present study demonstrates that in vivo inhibition of miR-155 supports cerebral vasculature after experimental stroke. Intravenous injections of a specific miR-155 inhibitor were initiated at 48 h after mouse distal middle cerebral artery occlusion (dMCAO). Microvasculature in peri-infarct area, infarct size, and animal functional recovery were assessed at 1, 2, and 3 weeks after dMCAO. Using in vivo two-photon microscopy, we detected improved blood flow and microvascular integrity in the peri-infarct area of miR-155 inhibitor-injected mice. Electron microscopy revealed that, in contrast to the control group, these animals demonstrated well preserved capillary tight junctions (TJs). Western blot analysis data indicate that improved TJ integrity in the inhibitor-injected animals could be associated with stabilization of the TJ protein ZO-1 and mediated by the miR-155 target protein Rheb. MRI analysis showed significant (34%) reduction of infarct size in miR-155 inhibitor-injected animals at 21 d after dMCAO. Reduced brain injury was confirmed by electron microscopy demonstrating decreased neuronal damage in the peri-infarct area of stroke. Preservation of brain tissue was reflected in efficient functional recovery of inhibitor-injected animals. Based on our findings, we propose that in vivo miR-155 inhibition after ischemia supports brain microvasculature, reduces brain tissue damage, and improves the animal functional recovery. Significance statement: In the present study, we investigated an effect of the in vivo inhibition of a microRNA, miR-155, on brain recovery after experimental cerebral ischemia. To our knowledge, this is the first report describing the efficiency of intravenous anti-miRNA injections in a mouse model of ischemic stroke. The role of miRNAs in poststroke revascularization has been unexplored and in vivo regulation of miRNAs during the subacute phase of stroke has not yet been proposed. Our investigation introduces a new and unexplored approach to cerebral regeneration: regulation of poststroke angiogenesis and recovery through direct modulation of specific miRNA activity. We expect that our findings will lead to the development of novel strategies for regulating neurorestorative processes in the postischemic brain.
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