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Cai D, Fraunfelder M, Fujise K, Chen SY. ADAR1 exacerbates ischemic brain injury via astrocyte-mediated neuron apoptosis. Redox Biol 2023; 67:102903. [PMID: 37801857 PMCID: PMC10570147 DOI: 10.1016/j.redox.2023.102903] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 09/19/2023] [Accepted: 09/22/2023] [Indexed: 10/08/2023] Open
Abstract
Astrocytes affect stroke outcomes by acquiring functionally dominant phenotypes. Understanding molecular mechanisms dictating astrocyte functional status after brain ischemia/reperfusion may reveal new therapeutic strategies. Adenosine deaminase acting on RNA (ADAR1), an RNA editing enzyme, is not normally expressed in astrocytes, but highly induced in astrocytes in ischemic stroke lesions. The expression of ADAR1 steeply increased from day 1 to day 7 after middle cerebral artery occlusion (MCAO) for 1 h followed by reperfusion. ADAR1 deficiency markedly ameliorated the volume of the cerebral infarction and neurological deficits as shown by the rotarod and cylinder tests, which was due to the reduction of the numbers of activated astrocytes and microglia. Surprisingly, ADAR1 was mainly expressed in astrocytes while only marginally in microglia. In primary cultured astrocytes, ADAR1 promoted astrocyte proliferation via phosphatidylinositol 3-kinase (PI3K)/Akt pathway. Furthermore, ADAR1 deficiency inhibited brain cell apoptosis in mice with MCAO as well as in activated astrocyte-conditioned medium-induced neurons in vitro. It appeared that ADAR1 induces neuron apoptosis by secretion of IL-1β, IL-6 and TNF-α from astrocytes through the production of reactive oxygen species. These results indicated that ADAR1 is a novel regulator promoting the proliferation of the activated astrocytes following ischemic stroke, which produce various inflammatory cytokines, leading to neuron apoptosis and worsened ischemic stroke outcome.
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Affiliation(s)
- Dunpeng Cai
- Departments of Surgery, University of Missouri School of Medicine, Columbia, MO, USA
| | - Mikayla Fraunfelder
- Departments of Surgery, University of Missouri School of Medicine, Columbia, MO, USA
| | - Ken Fujise
- Harborview Medical Center, Department of Medicine, University of Washington, Seattle, WA, USA
| | - Shi-You Chen
- Departments of Surgery, University of Missouri School of Medicine, Columbia, MO, USA; The Research Service, Harry S. Truman Memorial Veterans Hospital, Columbia, MO, USA.
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2
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Ferreira JRP, Sucupira ID, Carvalho GMC, Paiva FF, Pimentel-Coelho PM, Rosado-de-Castro PH, Mourão PAS, Fonseca RJC. A Combination of Ex Vivo and In Vivo Strategies for Evaluating How Much New Oral Anticoagulants Exacerbate Experimental Intracerebral Bleeding. TH OPEN 2023; 7:e195-e205. [PMID: 37435564 PMCID: PMC10332909 DOI: 10.1055/s-0043-1770782] [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: 03/02/2023] [Accepted: 05/22/2023] [Indexed: 07/13/2023] Open
Abstract
Background Intracerebral hemorrhage is the most serious complication of anticoagulant therapy but the effects of different types of oral anticoagulants on the expansion of these hemorrhages are still unclear. Clinical studies have revealed controversial results; more robust and long-term clinical evaluations are necessary to define their outcomes. An alternative is to test the effect of these drugs in experimental models of intracerebral bleeding induced in animals. Aims To test new oral anticoagulants (dabigatran etexilate, rivaroxaban, and apixaban) in an experimental model of intracerebral hemorrhage induced by collagenase injection into the brain striatum of rats. Warfarin was used for comparison. Methods Ex vivo anticoagulant assays and an experimental model of venous thrombosis were employed to determine the doses and periods of time required for the anticoagulants to achieve their maximum effects. Subsequently, volumes of brain hematoma were evaluated after administration of the anticoagulants, using these same parameters. Volumes of brain hematoma were evaluated by magnetic resonance imaging, H&E (hematoxylin and eosin) staining, and Evans blue extravasation. Neuromotor function was assessed by the elevated body swing test. Results and Conclusions The new oral anticoagulants did not increase intracranial bleeding compared with control animals, while warfarin markedly favored expansion of the hematomas, as revealed by magnetic resonance imaging and H&E staining. Dabigatran etexilate caused a modest but statistically significant increase in Evans blue extravasation. We did not observe significant differences in elevated body swing tests among the experimental groups. The new oral anticoagulants may provide a better control over a brain hemorrhage than warfarin.
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Affiliation(s)
- Juliana R. P. Ferreira
- Laboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho and Programa de Glicobiologia, Instituto de Bioquímica Médica Leopoldo de Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Isabela D. Sucupira
- Laboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho and Programa de Glicobiologia, Instituto de Bioquímica Médica Leopoldo de Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Gabriella M. C. Carvalho
- Laboratório de Coagulação e Trombose, Hospital Universitário Clementino Fraga Filho, Instituto de Ciências Biomédicas, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Fernando F. Paiva
- Centro de Imagens e Espectroscopia por Ressonância Magnética (CIERMag). Departamento de Física e Ciência Interdisciplinar. Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, Brazil
| | - Pedro M. Pimentel-Coelho
- Laboratório Intermediário de Neuropatologia Experimental. Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Laboratório Intermediário de Neuropatologia Experimental. Instituto Nacional de Ciência e Tecnologia em Medicina Regenerativa, Rio de Janeiro, Brazil
| | - Paulo H. Rosado-de-Castro
- Laboratório de Coagulação e Trombose, Hospital Universitário Clementino Fraga Filho, Instituto de Ciências Biomédicas, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Laboratório Intermediário de Neuropatologia Experimental. Instituto Nacional de Ciência e Tecnologia em Medicina Regenerativa, Rio de Janeiro, Brazil
| | - Paulo A. S. Mourão
- Laboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho and Programa de Glicobiologia, Instituto de Bioquímica Médica Leopoldo de Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Roberto J. C. Fonseca
- Laboratório de Coagulação e Trombose, Hospital Universitário Clementino Fraga Filho, Instituto de Ciências Biomédicas, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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3
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Liu H, Xue Y, Chen L. Angiotensin II increases the firing activity of pallidal neurons and participates in motor control in rats. Metab Brain Dis 2023; 38:573-587. [PMID: 36454502 DOI: 10.1007/s11011-022-01127-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 11/22/2022] [Indexed: 12/05/2022]
Abstract
The globus pallidus has emerged as a crucial node in the basal ganglia motor control circuit under both healthy and parkinsonian states. Previous studies have shown that angiotensin II (Ang II) and angiotensin subtype 1 receptor (AT1R) are closely related to Parkinson's disease (PD). Recent morphological study revealed the expression of AT1R in the globus pallidus of mice. To investigate the functions of Ang II/AT1R on the globus pallidus neurons of both normal and parkinsonian rats, electrophysiological recordings and behavioral tests were performed in the present study. Electrophysiological recordings showed that exogenous and endogenous Ang II mainly excited the globus pallidus neurons through AT1R. Behavioral tests further demonstrated that unilateral microinjection of Ang II into the globus pallidus induced significantly contralateral-biased swing in elevated body swing test (EBST), and bilateral microinjection of Ang II into the globus pallidus alleviated catalepsy and akinesia caused by haloperidol. AT1R was involved in Ang II-induced behavioral effects. Immunostaining showed that AT1R was expressed in the globus pallidus of rats. On the basis of the present findings, we concluded that pallidal Ang II/AT1R alleviated parkinsonian motor deficits through activating globus pallidus neurons, which will provide a rationale for further investigations into the potential of Ang II in the treatment of motor disorders originating from the basal ganglia.
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Affiliation(s)
- Hongxia Liu
- Department of Physiology, School of Basic Medicine, Qingdao University, Qingdao, China
- Department of Physiology, Binzhou Medical University, Yantai, China
| | - Yan Xue
- Department of Physiology, School of Basic Medicine, Qingdao University, Qingdao, China.
| | - Lei Chen
- Department of Physiology, School of Basic Medicine, Qingdao University, Qingdao, China.
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4
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Chan WH, Hsu YJ, Cheng CP, Chou KN, Chen CL, Huang SM, Kan WC, Chiu YL. Assessing the Global Impact on the Mouse Kidney After Traumatic Brain Injury: A Transcriptomic Study. J Inflamm Res 2022; 15:4833-4851. [PMID: 36042866 PMCID: PMC9420446 DOI: 10.2147/jir.s375088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 08/19/2022] [Indexed: 11/23/2022] Open
Abstract
Purpose In this study, we use animal models combined with bioinformatics strategies to investigate the potential changes in overall renal transcriptional expression after traumatic brain injury. Methods Microarray analysis was performed after kidney acquisition using unilateral controlled cortical impact as the primary mouse TBI model. Multi-oriented gene set enrichment analysis was performed for differentially expressed genes. Results The results showed that TBI affected the gene set associated with mitochondria function in kidney cells, and a negative enrichment of gene sets associated with immune cell migration and epidermal development was also observed. Analysis of the disease phenotype gene set revealed that differential expression of mitochondria-related genes was associated with lactate metabolism. Alternatively, activation and adhesion of immune cells associated with the complement system may promote autoinflammation in kidney tissue. The simulated immune cell infiltration analysis showed an increase in the proportion of activated memory CD4 T cells and a decrease in the proportion of resting memory CD4 T cells, suggesting that activated memory CD4 T cell infiltration may be involved in the inflammation of renal tissue and cause damage to renal cells, such as principal cells, mesangial cells and loops of Henle cells. Conclusion This study is the first to reveal the effects of brain trauma on the kidney. TBI may affect the expression of mitochondria function-related gene sets in renal cells by increasing lactate. It may also affect renal mesangial cells by inducing increased infiltration of immune cells through mechanisms related to complement system activation or autoimmune antibodies.
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Affiliation(s)
- Wei-Hung Chan
- Department of Anesthesiology, Tri-Service General Hospital, National Defense Medical Center, Taipei City, Taiwan, Republic of China.,Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei City, Taiwan, Republic of China
| | - Yu-Juei Hsu
- Division of Nephrology, Department of Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei City, Taiwan, Republic of China
| | - Chiao-Pei Cheng
- Department of Anesthesiology, Tri-Service General Hospital, National Defense Medical Center, Taipei City, Taiwan, Republic of China
| | - Kuan-Nien Chou
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei City, Taiwan, Republic of China.,Department of Neurosurgery, Tri-Service General Hospital, National Defense Medical Center, Taipei City, Taiwan, Republic of China
| | - Chin-Li Chen
- Division of Urology, Department of Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei City, Taiwan, Republic of China
| | - Shih-Ming Huang
- Department of Biochemistry, National Defense Medical Center, Taipei City, Taiwan, Republic of China
| | - Wei-Chih Kan
- Department of Nephrology, Department of Internal Medicine, Chi-Mei Medical Center, Tainan City, Taiwan, Republic of China.,Department of Biological Science and Technology, Chung Hwa University of Medical Technology, Tainan City, Taiwan, Republic of China
| | - Yi-Lin Chiu
- Department of Biochemistry, National Defense Medical Center, Taipei City, Taiwan, Republic of China
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5
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In vivo Bidirectional Modulation of Cannabinoid on the Activity of Globus Pallidus in Rats. Neuroscience 2021; 468:123-138. [PMID: 34129911 DOI: 10.1016/j.neuroscience.2021.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/29/2021] [Accepted: 06/01/2021] [Indexed: 11/23/2022]
Abstract
Endocannabinoids are bioactive substances which participate in central motor control. The globus pallidus (GP) is a major nucleus in the basal ganglia circuit, which plays an important function in movement regulation. Both cannabinoid receptor type 1 (CB1R) and cannabinoid receptor type 2 (CB2R) are expressed in the GP suggesting GP as a main action area of endocannabinoids. To investigate the direct electrophysiological and behavioral effects of cannabinoids in GP, in vivo single unit extracellular recordings and behavioral tests were performed in rats. Administration of WIN 55,212-2 exerted three neuronal response patterns from all sampled neurons of GP, including (1) increase of the firing rate; (2) decrease of the firing rate; (3) increase and then decrease of the firing rate. Selectively blocking CB1R by AM 251 decreased the firing rate and increased the firing rate. Selectively blocking CB2R by AM 630 did not change the firing rate significantly, which suggested that endocannabinoids modulated the spontaneous firing activity of pallidal neurons mainly via CB1R. Furthermore, co-application of AM 251, but not AM 630, blocked WIN 55,212-2-induced modulation of firing activity of pallidal neurons. Finally, both haloperidol-induced postural behavioral test and elevated body swing test (EBST) showed that unilateral microinjection of WIN 55,212-2 mainly induced contralateral-biased swing and deflection behaviors. Meanwhile, AM 251 produced opposite effect. The present in vivo study revealed that cannabinoids produced complicated electrophysiological and behavioral effects in the GP, which further demonstrated that the GP is a major functional region of endocannabinoid.
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Abbasi Y, Mousavizadeh K, Shabani R, Katebi M, Mehdizadeh M. Behavioral Changes in Combination Therapy of Ethanol and Modafinil on Rats Focal Cerebral Ischemia. Basic Clin Neurosci 2020; 11:269-278. [PMID: 32963720 PMCID: PMC7502185 DOI: 10.32598/bcn.11.3.269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 10/05/2018] [Accepted: 02/16/2019] [Indexed: 11/20/2022] Open
Abstract
Introduction: Ethanol is considered as an effective agent in reducing brain stroke injury. In this study, we assessed the effects of modafinil along with ethanol as a combination therapy on behavioral function in Wistar rats. Methods: The right Middle Cerebral Artery Occlusion (MCAO) was performed and the rats were divided into nine groups (n=8 per group). The animal groups in this study were as follows: 1. MCAO control group (ischemia without treatment); 2. Vehicle group; 3. Modafinil group that was randomly subdivided into three groups receiving different doses of modafinil (10, 30, and 100 mg/kg) for 7 days before MCAO; 4. Ethanol group receiving 1.5 g/kg ethanol at the time of reperfusion; 5. Modafinil + ethanol group that was further subdivided into three groups receiving modafinil at different doses (10, 30, and 100 mg/kg) for 7 days before MCAO and ethanol at the time of reperfusion. The motor behavior was measured using the Garcia test 24, 48, and 72 h after the ischemia, and the elevated body swing test was performed 48 and 72 h after the ischemia. The anxiety and locomotor activity were analyzed by open field test 48 and 72 h post-ischemia. Results: The results showed that the neurological deficit score, locomotor activity, and unexpected thigmotaxis (anxiety) in the ethanol, modafinil (in a dose-dependent manner), and ethanol+modafinil treatment groups were significantly higher than the MCAO control group. Conclusion: It seems that the combination therapy of modafinil (100 mg/kg) and ethanol (1.5 g/kg) significantly enhanced neuroprotection via an improvement in locomotor activity and neurological functions.
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Affiliation(s)
- Yusef Abbasi
- Department of Anatomy, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Department of Anatomy, School of Medicine, Arak University of Medical Sciences, Arak, Iran
| | - Kazem Mousavizadeh
- Cellular and Molecular Research Center, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Department of Molecular Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Ronak Shabani
- Department of Anatomy, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Cellular and Molecular Research Center, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Majid Katebi
- Department of Anatomy, School of Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Mehdi Mehdizadeh
- Department of Anatomy, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Cellular and Molecular Research Center, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
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7
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CYP3A Excipient-Based Microemulsion Prolongs the Effect of Magnolol on Ischemia Stroke Rats. Pharmaceutics 2020; 12:pharmaceutics12080737. [PMID: 32764430 PMCID: PMC7464078 DOI: 10.3390/pharmaceutics12080737] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/29/2020] [Accepted: 08/04/2020] [Indexed: 12/14/2022] Open
Abstract
Magnolol, which is a CYP3A substrate, is a well-known agent that can facilitate neuroprotection and reduce ischemic brain damage. However, a well-controlled release formulation is needed for the effective delivery of magnolol due to its poor water solubility. In this study, we have developed a formulation for a CYP3A-excipient microemulsion, which can be administrated intraperitoneally to increase the solubility and bioavailability of magnolol and increase its neuroprotective effect against ischemic brain injury. The results showed a significant improvement in the area under the plotted curve of drug concentration versus time curve (AUC0–t) and mean residence time (MRT) of magnolol in microemulsion compared to when it was dissolved in dimethyl sulfoxide (DMSO). Both magnolol in DMSO and microemulsion, administrated after the onset of ischemia, showed a reduced visual brain infarct size. As such, this demonstrates a therapeutic effect on ischemic brain injury caused by occlusion, however it is important to note that a pharmacological effect cannot be concluded by this study. Ultimately, our study suggests that the excipient inhibitor-based microemulsion formulation could be a promising concept for the substrate drugs of CYP3A.
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8
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Mello TG, Rosado-de-Castro PH, Campos RMP, Vasques JF, Rangel-Junior WS, Mattos RSDARD, Puig-Pijuan T, Foerster BU, Gutfilen B, Souza SAL, Boltze J, Paiva FF, Mendez-Otero R, Pimentel-Coelho PM. Intravenous Human Umbilical Cord-Derived Mesenchymal Stromal Cell Administration in Models of Moderate and Severe Intracerebral Hemorrhage. Stem Cells Dev 2020; 29:586-598. [PMID: 32160799 DOI: 10.1089/scd.2019.0176] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Intracerebral hemorrhage (ICH) is as a life-threatening condition that can occur in young adults, often causing long-term disability. Recent preclinical data suggest mesenchymal stromal cell (MSC)-based therapies as promising options to minimize brain damage after ICH. However, therapeutic evidence and mechanistic insights are still limited, particularly when compared with other disorders such as ischemic stroke. Herein, we employed a model of collagenase-induced ICH in young adult rats to investigate the potential therapeutic effects of an intravenous injection of human umbilical cord Wharton's jelly-derived MSCs (hUC-MSCs). Two doses of collagenase were used to cause moderate or severe hemorrhages. Magnetic resonance imaging showed that animals treated with hUC-MSCs after moderate ICH had smaller residual hematoma volumes than vehicle-treated rats, whereas the cell therapy failed to decrease the hematoma volume in animals with a severe ICH. Functional assessments (rotarod and elevated body swing tests) were performed for up to 21 days after ICH. Enduring neurological impairments were seen only in animals subjected to severe ICH, but the cell therapy did not induce statistically significant improvements in the functional recovery. The biodistribution of Technetium-99m-labeled hUC-MSCs was also evaluated, showing that most cells were found in organs such as the spleen and lungs 24 h after transplantation. Nevertheless, it was possible to detect a weak signal in the brain, which was higher in the ipsilateral hemisphere of rats subjected to a severe ICH. These data indicate that hUC-MSCs have moderately beneficial effects in cases of less severe brain hemorrhages in rats by decreasing the residual hematoma volume, and that optimization of the therapy is still necessary.
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Affiliation(s)
- Tanira Giara Mello
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,Instituto de Engenharia Nuclear, Comissão Nacional de Energia Nuclear, Rio de Janeiro, Brazil.,Instituto Nacional de Ciência e Tecnologia em Medicina Regenerativa, Rio de Janeiro, Brazil
| | - Paulo Henrique Rosado-de-Castro
- Instituto Nacional de Ciência e Tecnologia em Medicina Regenerativa, Rio de Janeiro, Brazil.,Departamento de Radiologia, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Juliana Ferreira Vasques
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,Instituto Nacional de Ciência e Tecnologia em Medicina Regenerativa, Rio de Janeiro, Brazil
| | | | | | - Teresa Puig-Pijuan
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,Instituto Nacional de Ciência e Tecnologia em Medicina Regenerativa, Rio de Janeiro, Brazil
| | - Bernd Uwe Foerster
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, Brazil
| | - Bianca Gutfilen
- Departamento de Radiologia, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Sergio Augusto Lopes Souza
- Departamento de Radiologia, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Johannes Boltze
- School of Life Sciences, University of Warwick, Coventry, United Kingdom
| | | | - Rosalia Mendez-Otero
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,Instituto Nacional de Ciência e Tecnologia em Medicina Regenerativa, Rio de Janeiro, Brazil
| | - Pedro Moreno Pimentel-Coelho
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,Instituto Nacional de Ciência e Tecnologia em Medicina Regenerativa, Rio de Janeiro, Brazil
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9
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Hung YW, Wang Y, Lee SL. DPP-4 inhibitor reduces striatal microglial deramification after sensorimotor cortex injury induced by external force impact. FASEB J 2020; 34:6950-6964. [PMID: 32246809 DOI: 10.1096/fj.201902818r] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 03/08/2020] [Accepted: 03/17/2020] [Indexed: 12/12/2022]
Abstract
Dipeptidyl peptidase-4 inhibitors (or gliptins), a class of antidiabetic drugs, have recently been shown to have protective actions in the central nervous system. Their cellular and molecular mechanisms responsible for these effects are largely unknown. In the present study, two structurally different gliptins, sitagliptin and vildagliptin, were examined for their therapeutic actions in a controlled cortical impact (CCI) model of moderate traumatic brain injury (TBI) in mice. Early post-CCI treatment with sitagliptin, but not vildagliptin, significantly reduced body asymmetry, locomotor hyperactivity, and brain lesion volume. Sitagliptin attenuated post-CCI microglial deramification in the ipsilateral dorsolateral (DL) striatum, while vildagliptin had no effect. Sitagliptin also reduced striatal expression of galectin-3 and monocyte chemoattractant protein 1(MCP-1), and increased the cortical and striatal levels of the anti-inflammatory cytokine IL-10 on the ipsilateral side. These data support a differential protective effect of sitagliptin against TBI, possibly mediated by an anti-inflammatory effect in striatum to preserve connective network. Both sitagliptin and vildagliptin produced similar increases of active glucagon-like peptide-1 (GLP-1) in blood and brain. Increasing active GLP-1 may not be the sole molecular mechanisms for the neurotherapeutic effect of sitagliptin in TBI.
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Affiliation(s)
- Yu-Wen Hung
- Institute of Cellular and System Medicine, National Health Research Institutes, Zhunan Town, Miaoli County, Taiwan, R.O.C
| | - Yun Wang
- Center for Neuropsychiatric Research, National Health Research Institutes, Zhunan Town, Miaoli County, Taiwan, R.O.C
| | - Sheau-Ling Lee
- Institute of Cellular and System Medicine, National Health Research Institutes, Zhunan Town, Miaoli County, Taiwan, R.O.C
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10
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The Effect of Exosomes Derived from Bone Marrow Stem Cells in Combination with Rosuvastatin on Functional Recovery and Neuroprotection in Rats After Ischemic Stroke. J Mol Neurosci 2020; 70:724-737. [PMID: 31974756 DOI: 10.1007/s12031-020-01483-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 01/17/2020] [Indexed: 02/06/2023]
Abstract
Rosuvastatin, known as a cholesterol-lowering agent, has been used as an alternative therapy after the onset of stroke. In this study, neuroprotection and functional recovery of exosomes in combination with rosuvastatin have been investigated. Sixty adult male Wistar rats were subjected to middle cerebral artery occlusion (MCAO). Exosome at the dose of 100 μg and/or rosuvastatin at the dose of 20 mg/kg/day for 7 days were administered to rats as a therapeutic strategy. The elevated body swing test (EBST) and Garcia score were conducted as behavioral tests for the measurement of functional recovery. The histopathological and immunohistochemical analyses were also performed for the assessment of infarcted volume and neuroprotection in the brain of rats. The real-time PCR method was carried out to determine the relative expressions of the NLRP-3 and NLRP1 genes. After 7 days of treatment with exosome and rosuvastatin in rats which underwent MCAO, the decrease in infarct volume of the animals treated with exosome was more pronounced compared with those treated only with exosome. The combination therapy remarkably lowered the size of infarct volume. Our observation was confirmed by the downregulation of the NLRP1 and NLRP3 genes in response to combinatory treatment of rats induced by MCOA, denoting a lower rate of cell death. The number of GFAP-positive cells were reduced in the exosome-treated group compared with the MCAO group. The rate of lipid peroxidation was measured by malondialdehyde (MDA) levels which demonstrated a significant reduction of MDA in the exosome- and rotuvastatin-treated groups when compared with the MCAO group. However, the levels of the SOD enzyme did not significantly alter when the treatment groups were compared with the MCAO group. According to our findings, it seems that the use of exosomes and rosuvastatin, as a novel treatment regimen, might promote neurological recovery after the onset of stroke.
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11
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Zhao X, Bai F, Zhang E, Zhou D, Jiang T, Zhou H, Wang Q. Electroacupuncture Improves Neurobehavioral Function Through Targeting of SOX2-Mediated Axonal Regeneration by MicroRNA-132 After Ischemic Stroke. Front Mol Neurosci 2018; 11:471. [PMID: 30618618 PMCID: PMC6306468 DOI: 10.3389/fnmol.2018.00471] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 12/04/2018] [Indexed: 11/14/2022] Open
Abstract
Our previous studies have shown that electroacupuncture (EA) enhances neurobehavioral functional recovery after ischemic stroke, however, the underlying regulatory mechanisms remain unclear. MicroRNAs (miRNAs) are abundant in the brain and are involved in post-transcriptional gene regulation. During cerebral ischemia reperfusion, miRNAs perform numerous biological functions in the central nervous system related to regeneration and repair of damaged nerves. Our previous studies also have shown that the expression of miRNA-132 (miR-132) is obviously down-regulated after stroke by middle cerebral artery occlusion (MCAO), which can be up-regulated by EA. This study aimed to identify whether up-regulation of miR-132 by EA improved the damaged nerves after stroke and to screen the potential target of miR-132. The results showed that EA up-regulated miR-132 thus suppressing SOX2 expression in vivo after MCAO, which obviously ameliorated neurobehavioral functional recovery. Moreover, our results also suggested that up-regulated miR-132 suppressed SOX2 in primary neurons after oxygen-glucose deprivation (OGD), which promoted neurite outgrowth. In conclusion, EA enhances neurobehavioral functional recovery against ischemic stroke through targeting of SOX2-mediated axonal regeneration by miR-132.
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Affiliation(s)
- Xiaoying Zhao
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China.,Department of Anesthesiology, Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Fuhai Bai
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Erfei Zhang
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China.,Department of Anesthesiology, The Affiliated Hospital of Yan'an University, Yan'an, China
| | - Dandan Zhou
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China.,Department of Anesthesiology, The Northwest Women's and Children's Hospital, Xi'an, China
| | - Tao Jiang
- Department of Anesthesiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Heng Zhou
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Qiang Wang
- Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China.,Department of Anesthesiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
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12
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Balkaya MG, Trueman RC, Boltze J, Corbett D, Jolkkonen J. Behavioral outcome measures to improve experimental stroke research. Behav Brain Res 2018; 352:161-171. [DOI: 10.1016/j.bbr.2017.07.039] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 07/18/2017] [Accepted: 07/27/2017] [Indexed: 01/22/2023]
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13
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Wu D, Lu W, Wei Z, Xu M, Liu X. Neuroprotective Effect of Sirt2-specific Inhibitor AK-7 Against Acute Cerebral Ischemia is P38 Activation-dependent in Mice. Neuroscience 2018; 374:61-69. [PMID: 29382550 DOI: 10.1016/j.neuroscience.2018.01.040] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/29/2017] [Accepted: 01/18/2018] [Indexed: 01/08/2023]
Abstract
Cerebral ischemia is the most common cause of stroke with high morbidity, disability and mortality. Sirtuin-2 (Sirt2), a vitally important NAD+-dependent deacetylase which has been widely researched in central nervous system diseases, has also been identified as a promising treatment target using its specific inhibitors such as AK-7. In this study, we found that P38 was specifically activated after focal cerebral ischemic injury, and it was also significantly activated after AK-7 administration in a concentration-dependent manner in vitro and in vivo. AK-7 decreased the infarction volume remarkably and promoted the recovery of neurological function efficiently in the mice evaluated by behavior tests. In contrast, pP38 inhibition increased the infarct volume and exacerbated the symptoms of paralysis. Herein, we suggest AK-7 improves the outcome of brain ischemia in dependence on the P38 activation in mice, which may serve as a strategy for the treatment of stroke.
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Affiliation(s)
- Danhong Wu
- Department of Neurology, The Affiliated Shanghai NO.10 People's Hospital, Nanjing Medical University, 301 Yanchang Road, Shanghai 200072, China; Department of Oncology, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 280 Mohe Road, Shanghai 201999, China; Department of Neurology, Shanghai Fifth People's Hospital, Fudan University, 801 Heqing Road, Shanghai 200240, China
| | - Wenmei Lu
- Department of Oncology, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 280 Mohe Road, Shanghai 201999, China; Department of Neurology, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 280 Mohe Road, Shanghai 201999, China
| | - Zhenyu Wei
- Department of Neurology, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 280 Mohe Road, Shanghai 201999, China
| | - Ming Xu
- Department of Oncology, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 280 Mohe Road, Shanghai 201999, China.
| | - Xueyuan Liu
- Department of Neurology, The Affiliated Shanghai NO.10 People's Hospital, Nanjing Medical University, 301 Yanchang Road, Shanghai 200072, China; Department of Neurology, Shanghai Tenth People's Hospital of Tongji University, 301 Yanchang Road, Shanghai 200072, China.
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14
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Diao HL, Xue Y, Han XH, Wang SY, Liu C, Chen WF, Chen L. Adenosine A 2A Receptor Modulates the Activity of Globus Pallidus Neurons in Rats. Front Physiol 2017; 8:897. [PMID: 29163226 PMCID: PMC5682020 DOI: 10.3389/fphys.2017.00897] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 10/24/2017] [Indexed: 12/23/2022] Open
Abstract
The globus pallidus is a central nucleus in the basal ganglia motor control circuit. Morphological studies have revealed the expression of adenosine A2A receptors in the globus pallidus. To determine the modulation of adenosine A2A receptors on the activity of pallidal neurons in both normal and parkinsonian rats, in vivo electrophysiological and behavioral tests were performed in the present study. The extracellular single unit recordings showed that micro-pressure administration of adenosine A2A receptor agonist, CGS21680, regulated the pallidal firing activity. GABAergic neurotransmission was involved in CGS21680-induced modulation of pallidal neurons via a PKA pathway. Furthermore, application of two adenosine A2A receptor antagonists, KW6002 or SCH442416, mainly increased the spontaneous firing of pallidal neurons, suggesting that endogenous adenosine system modulates the activity of pallidal neurons through adenosine A2A receptors. Finally, elevated body swing test (EBST) showed that intrapallidal microinjection of adenosine A2A receptor agonist/antagonist induced ipsilateral/contralateral-biased swing, respectively. In addition, the electrophysiological and behavioral findings also revealed that activation of dopamine D2 receptors by quinpirole strengthened KW6002/SCH442416-induced excitation of pallidal activity. Co-application of quinpirole with KW6002 or SCH442416 alleviated biased swing in hemi-parkinsonian rats. Based on the present findings, we concluded that pallidal adenosine A2A receptors may be potentially useful in the treatment of Parkinson's disease.
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Affiliation(s)
- Hui-Ling Diao
- Department of Physiology, Qingdao University, Qingdao, China.,Department of Physiology, Binzhou Medical University, Yantai, China
| | - Yan Xue
- Department of Physiology, Qingdao University, Qingdao, China
| | - Xiao-Hua Han
- Department of Physiology, Qingdao University, Qingdao, China
| | - Shuang-Yan Wang
- Department of Physiology, Qingdao University, Qingdao, China.,Department of Anatomy, Qingdao University, Qingdao, China
| | - Cui Liu
- Department of Physiology, Qingdao University, Qingdao, China
| | - Wen-Fang Chen
- Department of Physiology, Qingdao University, Qingdao, China
| | - Lei Chen
- Department of Physiology, Qingdao University, Qingdao, China
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