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Zhang SH, Yin J, Jing LJ, Cheng Y, Miao YL, Fan B, Zhang HF, Yang CH, Wang SS, Li Y, Jiao XY, Fan YY. Targeting astrocytic TDAG8 with delayed CO 2 postconditioning improves functional outcomes after controlled cortical impact injury in mice. Exp Neurol 2024; 380:114892. [PMID: 39047809 DOI: 10.1016/j.expneurol.2024.114892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 06/18/2024] [Accepted: 07/21/2024] [Indexed: 07/27/2024]
Abstract
T-cell death-associated gene 8 (TDAG8), a G-protein-coupled receptor sensing physiological or weak acids, regulates inflammatory responses. However, its role in traumatic brain injury (TBI) remains unknown. Our recent study showed that delayed CO2 postconditioning (DCPC) has neuroreparative effects after TBI. We hypothesized that activating astrocytic TDAG8 is a key mechanism for DCPC. WT and TDAG8-/- mice received DCPC daily by transiently inhaling 10% CO2 after controlled cortical impact (CCI). HBAAV2/9-GFAP-m-TDAG8-3xflag-EGFP was used to overexpress TDAG8 in astrocytes. The beam walking test, mNSS, immunofluorescence and Golgi-Cox staining were used to evaluate motor function, glial activation and dendritic plasticity. DCPC significantly improved motor function; increased total dendritic length, neuronal complexity and spine density; inhibited overactivation of astrocytes and microglia; and promoted the expression of astrocytic brain-derived neurotrophic factor in WT but not TDAG8-/- mice. Overexpressing TDAG8 in astrocytes surrounding the lesion in TDAG8-/- mice restored the beneficial effects of DCPC. Although the effects of DCPC on Days 14-28 were much weaker than those of DCPC on Days 3-28 in WT mice, these effects were further enhanced by overexpressing astrocytic TDAG8. Astrocytic TDAG8 is a key target of DCPC for TBI rehabilitation. Its overexpression is a strategy that broadens the therapeutic window and enhances the effects of DCPC.
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Affiliation(s)
- Shu-Han Zhang
- Department of Pharmacology, School of Basic Medical Science, Shanxi Medical University, Taiyuan 030001, Shanxi, China
| | - Jing Yin
- Department of Pharmacology, School of Basic Medical Science, Shanxi Medical University, Taiyuan 030001, Shanxi, China
| | - Lian-Ju Jing
- Department of Pharmacology, School of Basic Medical Science, Shanxi Medical University, Taiyuan 030001, Shanxi, China
| | - Yao Cheng
- Department of Pharmacology, School of Basic Medical Science, Shanxi Medical University, Taiyuan 030001, Shanxi, China
| | - Yu-Lu Miao
- Department of Pharmacology, School of Basic Medical Science, Shanxi Medical University, Taiyuan 030001, Shanxi, China; Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan 030001, Shanxi, China
| | - Bo Fan
- Medicinal Basic Research Innovation Center of Chronic Kidney Disease, Ministry of Education, Shanxi Medical University, Taiyuan 030001, China
| | - Hui-Feng Zhang
- Department of Pharmacology, School of Basic Medical Science, Shanxi Medical University, Taiyuan 030001, Shanxi, China
| | - Cai-Hong Yang
- Department of Pharmacology, School of Basic Medical Science, Shanxi Medical University, Taiyuan 030001, Shanxi, China
| | - Shao-Shuai Wang
- Department of Neurology, First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Yan Li
- Department of Pharmacology, School of Basic Medical Science, Shanxi Medical University, Taiyuan 030001, Shanxi, China; Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan 030001, Shanxi, China.
| | - Xiang-Ying Jiao
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan 030001, Shanxi, China.
| | - Yan-Ying Fan
- Department of Pharmacology, School of Basic Medical Science, Shanxi Medical University, Taiyuan 030001, Shanxi, China; Medicinal Basic Research Innovation Center of Chronic Kidney Disease, Ministry of Education, Shanxi Medical University, Taiyuan 030001, China.
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Fan YY, Li Y, Tian XY, Wang YJ, Huo J, Guo BL, Chen R, Yang CH, Li Y, Zhang HF, Niu BL, Zhang MS. Delayed Chronic Acidic Postconditioning Improves Poststroke Motor Functional Recovery and Brain Tissue Repair by Activating Proton-Sensing TDAG8. Transl Stroke Res 2024; 15:620-635. [PMID: 36853417 DOI: 10.1007/s12975-023-01143-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 12/13/2022] [Accepted: 02/17/2023] [Indexed: 03/01/2023]
Abstract
Acidic postconditioning by transient CO2 inhalation applied within minutes after reperfusion has neuroprotective effects in the acute phase of stroke. However, the effects of delayed chronic acidic postconditioning (DCAPC) initiated during the subacute phase of stroke or other acute brain injuries are unknown. Mice received daily DCAPC by inhaling 5%/10%/20% CO2 for various durations (three cycles of 10- or 20-min CO2 inhalation/10-min break) at days 3-7, 7-21, or 3-21 after photothrombotic stroke. Grid-walk, cylinder, and gait tests were used to assess motor function. DCAPC with all CO2 concentrations significantly promoted motor functional recovery, even when DCAPC was delayed for 3-7 days. DCAPC enhanced the puncta density of GAP-43 (a marker of axon growth and regeneration) and synaptophysin (a marker of synaptogenesis) and reduced the amoeboid microglia number, glial scar thickness and mRNA expression of CD16 and CD32 (markers of proinflammatory M1 microglia) compared with those of the stroke group. Cerebral blood flow (CBF) increased in response to DCAPC. Furthermore, the mRNA expression of TDAG8 (a proton-activated G-protein-coupled receptor) was increased during the subacute phase of stroke, while DCAPC effects were blocked by systemic knockout of TDAG8, except for those on CBF. DCAPC reproduced the benefits by re-expressing TDAG8 in the peri-infarct cortex of TDAG8-/- mice infected with HBAAV2/9-CMV-TDAG8-3flag-ZsGreen. Taken together, we first showed that DCAPC promoted functional recovery and brain tissue repair after stroke with a wide therapeutic time window of at least 7 days after stroke. Brain-derived TDAG8 is a direct target of DCAPC that induces neuroreparative effects.
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Affiliation(s)
- Yan-Ying Fan
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China.
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China.
| | - Yu Li
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China
| | - Xiao-Ying Tian
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China
| | - Ying-Jing Wang
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China
| | - Jing Huo
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China
| | - Bao-Lu Guo
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China
| | - Ru Chen
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China
| | - Cai-Hong Yang
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China
| | - Yan Li
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China
| | - Hui-Feng Zhang
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China
| | - Bao-Long Niu
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China.
- College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China.
| | - Ming-Sheng Zhang
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China.
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Lee YS, Park YR, Lee HB, Park HJ, Lee HE, Kim GA, Kim SH, Shin JH. The preventive effect of Gastrodia elata Blume extract on vancomycin-induced acute kidney injury in rats. Lab Anim Res 2024; 40:14. [PMID: 38589968 PMCID: PMC11000351 DOI: 10.1186/s42826-024-00200-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 03/14/2024] [Accepted: 03/20/2024] [Indexed: 04/10/2024] Open
Abstract
BACKGROUND Gastrodia elata Blume (GEB), a traditional medicinal herb, has been reported to have pharmacological effect including protection against liver, neuron and kidney toxicity. However, explanation of its underlying mechanisms remains a great challenge. This study investigated the protective effects of GEB extract on vancomycin (VAN)-induced nephrotoxicity in rats and underlying mechanisms with emphasis on the anti-oxidative stress, anti-inflammation and anti-apoptosis. The male Sprague-Dawley rats were randomly divided three groups: control (CON) group, VAN group and GEB group with duration of 14 days. RESULTS The kidney weight and the serum levels of blood urea nitrogen and creatinine in the GEB group were lower than the VAN group. Histological analysis using hematoxylin & eosin and periodic acid Schiff staining revealed pathological changes of the VAN group. Immunohistochemical analysis revealed that the expression levels of N-acetyl-D-glucosaminidase, myeloperoxidase and tumor necrosis factor-alpha in the GEB group were decreased when compared with the VAN group. The number of terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling-positive cells, phosphohistone and malondialdehyde levels were lower in the GEB group than VAN group. The levels of total glutathione in the GEB group were higher than the VAN group. CONCLUSIONS The findings of this study suggested that GEB extract prevents VAN-induced renal tissue damage through anti-oxidation, anti-inflammation and anti-apoptosis.
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Affiliation(s)
- Yeon Su Lee
- Department of Senior Healthcare, Eulji University, Uijeongbu, 11549, Korea
- Department of Biomedical Laboratory Science, Eulji University, Seongnam, 13135, Korea
| | - Yu Rim Park
- Department of Senior Healthcare, Eulji University, Uijeongbu, 11549, Korea
- Department of Biomedical Laboratory Science, Eulji University, Seongnam, 13135, Korea
| | - Hyo Bin Lee
- Department of Senior Healthcare, Eulji University, Uijeongbu, 11549, Korea
- Department of Biomedical Laboratory Science, Eulji University, Seongnam, 13135, Korea
| | - Hye Joon Park
- Department of Senior Healthcare, Eulji University, Uijeongbu, 11549, Korea
- Department of Biomedical Laboratory Science, Eulji University, Seongnam, 13135, Korea
| | - Ha Eun Lee
- Department of Senior Healthcare, Eulji University, Uijeongbu, 11549, Korea
- Department of Biomedical Laboratory Science, Eulji University, Seongnam, 13135, Korea
| | - Geon A Kim
- Department of Senior Healthcare, Eulji University, Uijeongbu, 11549, Korea
- Department of Biomedical Laboratory Science, Eulji University, Uijeongbu, 11759, Korea
| | - Sang-Hoon Kim
- Department of Internal Medicine, Eulji Hospital, Seoul, 01830, Korea.
- Eulji Medi-Bio Research Institute, Eulji University School of Medicine, Seoul, 01830, Korea.
| | - Jae-Ho Shin
- Department of Senior Healthcare, Eulji University, Uijeongbu, 11549, Korea.
- Department of Biomedical Laboratory Science, Eulji University, Seongnam, 13135, Korea.
- Eulji Medi-Bio Research Institute, Eulji University School of Medicine, Seoul, 01830, Korea.
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Li Y, Chen R, Shen G, Yin J, Li Y, Zhao J, Nan F, Zhang S, Zhang H, Yang C, Wu M, Fan Y. Delayed CO 2 postconditioning promotes neurological recovery after cryogenic traumatic brain injury by downregulating IRF7 expression. CNS Neurosci Ther 2023; 29:3378-3390. [PMID: 37208955 PMCID: PMC10580333 DOI: 10.1111/cns.14268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 04/23/2023] [Accepted: 05/03/2023] [Indexed: 05/21/2023] Open
Abstract
AIMS Few treatments are available in the subacute phase of traumatic brain injury (TBI) except rehabilitation training. We previously reported that transient CO2 inhalation applied within minutes after reperfusion has neuroprotective effects against cerebral ischemia/reperfusion injury. In this study, it was hypothesized that delayed CO2 postconditioning (DCPC) starting at the subacute phase may promote neurological recovery of TBI. METHODS Using a cryogenic TBI (cTBI) model, mice received DCPC daily by inhaling 5%/10%/20% CO2 for various time-courses (one/two/three cycles of 10-min inhalation/10-min break) at Days 3-7, 3-14 or 7-18 after cTBI. Beam walking and gait tests were used to assess the effect of DCPC. Lesion size, expression of GAP-43 and synaptophysin, amoeboid microglia number and glia scar area were detected. Transcriptome and recombinant interferon regulatory factor 7 (Irf7) adeno-associated virus were applied to investigate the molecular mechanisms. RESULTS DCPC significantly promoted recovery of motor function in a concentration and time-course dependent manner with a wide therapeutic time window of at least 7 days after cTBI. The beneficial effects of DCPC were blocked by intracerebroventricular injection of NaHCO3 . DCPC also increased puncta density of GAP-43 and synaptophysin, and reduced amoeboid microglia number and glial scar formation in the cortex surrounding the lesion. Transcriptome analysis showed many inflammation-related genes and pathways were altered by DCPC, and Irf7 was a hub gene, while overexpression of IRF7 blocked the motor function improvement of DCPC. CONCLUSIONS We first showed that DCPC promoted functional recovery and brain tissue repair, which opens a new therapeutic time window of postconditioning for TBI. Inhibition of IRF7 is a key molecular mechanism for the beneficial effects of DCPC, and IRF7 may be a potential therapeutic target for rehabilitation after TBI.
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Affiliation(s)
- Yan Li
- Department of Pharmacology, Basic Medical Sciences CenterShanxi Medical UniversityTaiyuanChina
| | - Ru Chen
- Department of Pharmacology, Basic Medical Sciences CenterShanxi Medical UniversityTaiyuanChina
| | - Gui‐Ping Shen
- Department of Pharmacology, Basic Medical Sciences CenterShanxi Medical UniversityTaiyuanChina
| | - Jing Yin
- Department of Pharmacology, Basic Medical Sciences CenterShanxi Medical UniversityTaiyuanChina
| | - Yu Li
- Department of Pharmacology, Basic Medical Sciences CenterShanxi Medical UniversityTaiyuanChina
| | - Jing Zhao
- Department of Pharmacology, Basic Medical Sciences CenterShanxi Medical UniversityTaiyuanChina
| | - Fang Nan
- Department of Pharmacology, Basic Medical Sciences CenterShanxi Medical UniversityTaiyuanChina
| | - Shu‐Han Zhang
- Department of Pharmacology, Basic Medical Sciences CenterShanxi Medical UniversityTaiyuanChina
| | - Hui‐Feng Zhang
- Department of Pharmacology, Basic Medical Sciences CenterShanxi Medical UniversityTaiyuanChina
| | - Cai‐Hong Yang
- Department of Pharmacology, Basic Medical Sciences CenterShanxi Medical UniversityTaiyuanChina
| | - Mei‐Na Wu
- Key Laboratory of Cellular Physiology, Ministry of EducationShanxi Medical UniversityTaiyuanChina
| | - Yan‐Ying Fan
- Department of Pharmacology, Basic Medical Sciences CenterShanxi Medical UniversityTaiyuanChina
- Key Laboratory of Cellular Physiology, Ministry of EducationShanxi Medical UniversityTaiyuanChina
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Gałgańska H, Jarmuszkiewicz W, Gałgański Ł. Carbon dioxide and MAPK signalling: towards therapy for inflammation. Cell Commun Signal 2023; 21:280. [PMID: 37817178 PMCID: PMC10566067 DOI: 10.1186/s12964-023-01306-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 09/05/2023] [Indexed: 10/12/2023] Open
Abstract
Inflammation, although necessary to fight infections, becomes a threat when it exceeds the capability of the immune system to control it. In addition, inflammation is a cause and/or symptom of many different disorders, including metabolic, neurodegenerative, autoimmune and cardiovascular diseases. Comorbidities and advanced age are typical predictors of more severe cases of seasonal viral infection, with COVID-19 a clear example. The primary importance of mitogen-activated protein kinases (MAPKs) in the course of COVID-19 is evident in the mechanisms by which cells are infected with SARS-CoV-2; the cytokine storm that profoundly worsens a patient's condition; the pathogenesis of diseases, such as diabetes, obesity, and hypertension, that contribute to a worsened prognosis; and post-COVID-19 complications, such as brain fog and thrombosis. An increasing number of reports have revealed that MAPKs are regulated by carbon dioxide (CO2); hence, we reviewed the literature to identify associations between CO2 and MAPKs and possible therapeutic benefits resulting from the elevation of CO2 levels. CO2 regulates key processes leading to and resulting from inflammation, and the therapeutic effects of CO2 (or bicarbonate, HCO3-) have been documented in all of the abovementioned comorbidities and complications of COVID-19 in which MAPKs play roles. The overlapping MAPK and CO2 signalling pathways in the contexts of allergy, apoptosis and cell survival, pulmonary oedema (alveolar fluid resorption), and mechanical ventilation-induced responses in lungs and related to mitochondria are also discussed. Video Abstract.
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Affiliation(s)
- Hanna Gałgańska
- Faculty of Biology, Molecular Biology Techniques Laboratory, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 6, 61-614, Poznan, Poland
| | - Wieslawa Jarmuszkiewicz
- Faculty of Biology, Department of Bioenergetics, Adam Mickiewicz University in Poznan, Institute of Molecular Biology and Biotechnology, Uniwersytetu Poznanskiego 6, 61-614, Poznan, Poland
| | - Łukasz Gałgański
- Faculty of Biology, Department of Bioenergetics, Adam Mickiewicz University in Poznan, Institute of Molecular Biology and Biotechnology, Uniwersytetu Poznanskiego 6, 61-614, Poznan, Poland.
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Zhou Z, Zhang Y, Han F, Chen Z, Zheng Y. Umbelliferone protects against cerebral ischemic injury through selective autophagy of mitochondria. Neurochem Int 2023; 165:105520. [PMID: 36933866 DOI: 10.1016/j.neuint.2023.105520] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/06/2023] [Accepted: 03/13/2023] [Indexed: 03/18/2023]
Abstract
Effective therapeutic treatments for ischemic stroke are limited. Previous studies suggest selective activation of mitophagy alleviates cerebral ischemic injury while excessive autophagy is detrimental. However, few compounds are available to selectively activate mitophagy without affecting autophagy flux. Here, we found that acute administration of Umbelliferone (UMB) upon reperfusion exerted neuroprotective effects against ischemic injury in mice subjected to transient middle cerebral artery occlusion (tMCAO) and suppressed oxygen-glucose deprivation reperfusion (OGD-R)-induced apoptosis in SH-SY5Y cells. Interestingly, UMB promoted the translocation of mitophagy adaptor SQSTM1 to mitochondria and further reduced the mitochondrial content as well as the expression of SQSTM1 in SHSY5Y cells after OGD-R. Importantly, both the mitochondrial loss and reduction of SQSTM1 expression after UMB incubation can be reversed by autophagy inhibitor chloroquine and wortmannin, proving the mitophagy activation by UMB. Nevertheless, UMB failed to further affect neither LC3 lipidation nor the number of autophagosomes after cerebral ischemia in vivo and in vitro. Furthermore, UMB facilitated OGD-R-induced mitophagy in a Parkin-dependent manner. Inhibition of autophagy/mitophagy either pharmaceutically or genetically abolished the neuroprotective effects of UMB. Taken all, these results suggest that UMB protects against cerebral ischemic injury, both in vivo and in vitro, via promoting mitophagy without increasing the autophagic flux. UMB might serve as a potential leading compound for selectively activating mitophagy and the treatment of ischemic stroke.
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Affiliation(s)
- Zhuchen Zhou
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Yan Zhang
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Feng Han
- Key Lab of Cardiovascular and Cerebrovascular Medicine, Drug Target and Drug Discovery Center, School of Pharmacy, Nanjing Medical University, Nanjing, 210023, China
| | - Zhong Chen
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
| | - Yanrong Zheng
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
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Munteanu C, Rotariu M, Turnea M, Dogaru G, Popescu C, Spînu A, Andone I, Postoiu R, Ionescu EV, Oprea C, Albadi I, Onose G. Recent Advances in Molecular Research on Hydrogen Sulfide (H 2S) Role in Diabetes Mellitus (DM)-A Systematic Review. Int J Mol Sci 2022; 23:ijms23126720. [PMID: 35743160 PMCID: PMC9223903 DOI: 10.3390/ijms23126720] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/10/2022] [Accepted: 06/13/2022] [Indexed: 02/01/2023] Open
Abstract
Abundant experimental data suggest that hydrogen sulfide (H2S) is related to the pathophysiology of Diabetes Mellitus (DM). Multiple molecular mechanisms, including receptors, membrane ion channels, signalingmolecules, enzymes, and transcription factors, are known to be responsible for the H2S biological actions; however, H2S is not fully documented as a gaseous signaling molecule interfering with DM and vascular-linked pathology. In recent decades, multiple approaches regarding therapeutic exploitation of H2S have been identified, either based on H2S exogenous apport or on its modulated endogenous biosynthesis. This paper aims to synthesize and systematize, as comprehensively as possible, the recent literature-related data regarding the therapeutic/rehabilitative role of H2S in DM. This review was conducted following the “Preferred reporting items for systematic reviews and meta-analyses” (PRISMA) methodology, interrogating five international medically renowned databases by specific keyword combinations/“syntaxes” used contextually, over the last five years (2017–2021). The respective search/filtered and selection methodology we applied has identified, in the first step, 212 articles. After deploying the next specific quest steps, 51 unique published papers qualified for minute analysis resulted. To these bibliographic resources obtained through the PRISMA methodology, in order to have the best available information coverage, we added 86 papers that were freely found by a direct internet search. Finally, we selected for a connected meta-analysis eight relevant reports that included 1237 human subjects elicited from clinical trial registration platforms. Numerous H2S releasing/stimulating compounds have been produced, some being used in experimental models. However, very few of them were further advanced in clinical studies, indicating that the development of H2S as a therapeutic agent is still at the beginning.
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Affiliation(s)
- Constantin Munteanu
- Faculty of Medical Bioengineering, University of Medicine and Pharmacy “Grigore T. Popa” Iași, 700115 Iași, Romania; (M.R.); (M.T.)
- Teaching Emergency Hospital “Bagdasar-Arseni”, 041915 Bucharest, Romania; (C.P.); (A.S.); (I.A.); (R.P.)
- Correspondence: (C.M.); (G.O.)
| | - Mariana Rotariu
- Faculty of Medical Bioengineering, University of Medicine and Pharmacy “Grigore T. Popa” Iași, 700115 Iași, Romania; (M.R.); (M.T.)
| | - Marius Turnea
- Faculty of Medical Bioengineering, University of Medicine and Pharmacy “Grigore T. Popa” Iași, 700115 Iași, Romania; (M.R.); (M.T.)
| | - Gabriela Dogaru
- Clinical Rehabilitation Hospital, 400066 Cluj-Napoca, Romania;
- Faculty of Medicine, “Iuliu Hatieganu” University of Medicine and Pharmacy, 400347 Cluj-Napoca, Romania
| | - Cristina Popescu
- Teaching Emergency Hospital “Bagdasar-Arseni”, 041915 Bucharest, Romania; (C.P.); (A.S.); (I.A.); (R.P.)
| | - Aura Spînu
- Teaching Emergency Hospital “Bagdasar-Arseni”, 041915 Bucharest, Romania; (C.P.); (A.S.); (I.A.); (R.P.)
- Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 050474 Bucharest, Romania
| | - Ioana Andone
- Teaching Emergency Hospital “Bagdasar-Arseni”, 041915 Bucharest, Romania; (C.P.); (A.S.); (I.A.); (R.P.)
- Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 050474 Bucharest, Romania
| | - Ruxandra Postoiu
- Teaching Emergency Hospital “Bagdasar-Arseni”, 041915 Bucharest, Romania; (C.P.); (A.S.); (I.A.); (R.P.)
| | - Elena Valentina Ionescu
- Faculty of Medicine, Ovidius University of Constanta, 900527 Constanta, Romania; (E.V.I.); (C.O.); (I.A.)
- Balneal and Rehabilitation Sanatorium of Techirghiol, 906100 Techirghiol, Romania
| | - Carmen Oprea
- Faculty of Medicine, Ovidius University of Constanta, 900527 Constanta, Romania; (E.V.I.); (C.O.); (I.A.)
- Balneal and Rehabilitation Sanatorium of Techirghiol, 906100 Techirghiol, Romania
| | - Irina Albadi
- Faculty of Medicine, Ovidius University of Constanta, 900527 Constanta, Romania; (E.V.I.); (C.O.); (I.A.)
- Teaching Emergency County Hospital “Sf. Apostol Andrei” Constanta, 900591 Constanta, Romania
| | - Gelu Onose
- Teaching Emergency Hospital “Bagdasar-Arseni”, 041915 Bucharest, Romania; (C.P.); (A.S.); (I.A.); (R.P.)
- Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 050474 Bucharest, Romania
- Correspondence: (C.M.); (G.O.)
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Role of Mitophagy in the Pathogenesis of Stroke: From Mechanism to Therapy. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:6232902. [PMID: 35265262 PMCID: PMC8898771 DOI: 10.1155/2022/6232902] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 02/02/2022] [Indexed: 12/15/2022]
Abstract
Mitochondria can supply adenosine triphosphate (ATP) to the tissue, which can regulate metabolism during the pathologic process and is also involved in the pathophysiology of neuronal injury after stroke. Recent studies have suggested that selective autophagy could play important roles in the pathophysiological process of stroke, especially mitophagy. It is usually mediated by the PINK1/Parkin-independent pathway or PINK1/Parkin-dependent pathway. Moreover, mitophagy may be a potential target in the therapy of stroke because the control of mitophagy is neuroprotective in stroke in vitro and in vivo. In this review, we briefly summarize recent researches in mitophagy, introduce the role of mitophagy in the pathogenesis of stroke, then highlight the strategies targeting mitophagy in the treatment of stroke, and finally propose several issues in the treatment of stroke by targeting mitophagy.
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Yeo LL, Arnberg F, Chireh A, Sharma V, Tan B, Gontu V, Little P, Holmin S. The Role of Carbon Dioxide in the Rat Acute Stroke Penumbra. Front Digit Health 2022; 3:824334. [PMID: 35187526 PMCID: PMC8854855 DOI: 10.3389/fdgth.2021.824334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 12/31/2021] [Indexed: 11/13/2022] Open
Abstract
Purpose The vasodilatory response to inhaled CO2 occurs in the acute stroke ischemic penumbra and may be a potential therapeutic modality. Methods Twenty-two Sprague-Dawley rats were subjected to 90-min occlusion of the M2 segment of the middle cerebral artery (M2CAO) by endovascular technique. The animals were administered different C02 concentrations and scanned serially with 9.4 T MRI. Infarct tissue was determined by diffusion-weighted imaging (DWI) and hypoperfused tissue was determined by arterial spin labeling (PWI). Results 4 animals were administered room air (RA)+ 6% CO2 (group 1), 6 animals RA+12% CO2 (Group 2) and 4 animals only RA (group 3). In the rats with CO2 administered (groups 1 and 2), the DWI lesion to cerebral hypoperfusion volume ratio (SD) at pre-CO2 administration, was 0.145(0.168), which increased to 0.708(0.731) during CO2 administration and reduced to 0.533(0.527) post-CO2 administration. In 9 of 10 rats the hypoperfused volume decreased when CO2 was administered. When CO2 was stopped the hypoperfused volume became larger again. Administration of RA+12% CO2 (Group 2) decreased the volume of CBF hypoperfusion significantly compared to the control group (95%CI: 0.084 ± 0.0213, p = 0.004). Conclusion Inhaled CO2 appears to reduce the size of the hypoperfused tissue volume during acute stroke and may be a potential modality for treatment of acute ischemic stroke. These findings will nonetheless need to be validated in a larger cohort in other centers.
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Affiliation(s)
- Leonard L. Yeo
- Departments of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Division of Neurology, Department of Medicine, National University Health System, Singapore, Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- *Correspondence: Leonard L. Yeo
| | - Fabian Arnberg
- Departments of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Arvin Chireh
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Vijay Sharma
- Division of Neurology, Department of Medicine, National University Health System, Singapore, Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Benjamin Tan
- Division of Neurology, Department of Medicine, National University Health System, Singapore, Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Vamsi Gontu
- Departments of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Philip Little
- Departments of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Staffan Holmin
- Departments of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
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10
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Onose G, Anghelescu A, Blendea D, Ciobanu V, Daia C, Firan FC, Oprea M, Spinu A, Popescu C, Ionescu A, Busnatu Ș, Munteanu C. Cellular and Molecular Targets for Non-Invasive, Non-Pharmacological Therapeutic/Rehabilitative Interventions in Acute Ischemic Stroke. Int J Mol Sci 2022; 23:ijms23020907. [PMID: 35055089 PMCID: PMC8846361 DOI: 10.3390/ijms23020907] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/07/2022] [Accepted: 01/12/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Cerebral circulation delivers the blood flow to the brain through a dedicated network of sanguine vessels. A healthy human brain can regulate cerebral blood flow (CBF) according to any physiological or pathological challenges. The brain is protected by its self-regulatory mechanisms, which are dependent on neuronal and support cellular populations, including endothelial ones, as well as metabolic, and even myogenic factors. OBJECTIVES Accumulating data suggest that "non-pharmacological" approaches might provide new opportunities for stroke therapy, such as electro-/acupuncture, hyperbaric oxygen therapy, hypothermia/cooling, photobiomodulation, therapeutic gases, transcranial direct current stimulations, or transcranial magnetic stimulations. We reviewed the recent data on the mechanisms and clinical implications of these non-pharmaceutical treatments. METHODS To present the state-of-the-art for currently available non-invasive, non-pharmacological-related interventions in acute ischemic stroke, we accomplished this synthetic and systematic literature review based on the Preferred Reporting Items for Systematic Principles Reviews and Meta-Analyses (PRISMA). RESULTS The initial number of obtained articles was 313. After fulfilling the five steps in the filtering/selection methodology, 54 fully eligible papers were selected for synthetic review. We enhanced our documentation with other bibliographic resources connected to our subject, identified in the literature within a non-standardized search, to fill the knowledge gaps. Fifteen clinical trials were also identified. DISCUSSION Non-invasive, non-pharmacological therapeutic/rehabilitative interventions for acute ischemic stroke are mainly holistic therapies. Therefore, most of them are not yet routinely used in clinical practice, despite some possible beneficial effects, which have yet to be supplementarily proven in more related studies. Moreover, few of the identified clinical trials are already completed and most do not have final results. CONCLUSIONS This review synthesizes the current findings on acute ischemic stroke therapeutic/rehabilitative interventions, described as non-invasive and non-pharmacological.
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Affiliation(s)
- Gelu Onose
- Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 020022 Bucharest, Romania; (C.D.); (M.O.); (A.S.); (A.I.); (Ș.B.)
- Neuromuscular Rehabilitation Clinic Division, Teaching Emergency Hospital” Bagdasar-Arseni”, 041915 Bucharest, Romania; (A.A.); (C.P.)
- Correspondence: (G.O.); (C.M.)
| | - Aurelian Anghelescu
- Neuromuscular Rehabilitation Clinic Division, Teaching Emergency Hospital” Bagdasar-Arseni”, 041915 Bucharest, Romania; (A.A.); (C.P.)
- Faculty of Midwives and Nursing, University of Medicine and Pharmacy “Carol Davila”, 020022 Bucharest, Romania
| | - Dan Blendea
- Faculty of Medicine, University ”Titu Maiorescu”, 0400511 Bucharest, Romania;
- Physical and Rehabilitation Medicine & Balneology Clinic Division, Teaching Emergency Hospital of the Ilfov County, 022113 Bucharest, Romania;
| | - Vlad Ciobanu
- Computer Science Department, Politehnica University of Bucharest, 060042 Bucharest, Romania;
| | - Cristina Daia
- Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 020022 Bucharest, Romania; (C.D.); (M.O.); (A.S.); (A.I.); (Ș.B.)
- Neuromuscular Rehabilitation Clinic Division, Teaching Emergency Hospital” Bagdasar-Arseni”, 041915 Bucharest, Romania; (A.A.); (C.P.)
| | - Florentina Carmen Firan
- Physical and Rehabilitation Medicine & Balneology Clinic Division, Teaching Emergency Hospital of the Ilfov County, 022113 Bucharest, Romania;
| | - Mihaela Oprea
- Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 020022 Bucharest, Romania; (C.D.); (M.O.); (A.S.); (A.I.); (Ș.B.)
- Neuromuscular Rehabilitation Clinic Division, Teaching Emergency Hospital” Bagdasar-Arseni”, 041915 Bucharest, Romania; (A.A.); (C.P.)
| | - Aura Spinu
- Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 020022 Bucharest, Romania; (C.D.); (M.O.); (A.S.); (A.I.); (Ș.B.)
- Neuromuscular Rehabilitation Clinic Division, Teaching Emergency Hospital” Bagdasar-Arseni”, 041915 Bucharest, Romania; (A.A.); (C.P.)
| | - Cristina Popescu
- Neuromuscular Rehabilitation Clinic Division, Teaching Emergency Hospital” Bagdasar-Arseni”, 041915 Bucharest, Romania; (A.A.); (C.P.)
| | - Anca Ionescu
- Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 020022 Bucharest, Romania; (C.D.); (M.O.); (A.S.); (A.I.); (Ș.B.)
| | - Ștefan Busnatu
- Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 020022 Bucharest, Romania; (C.D.); (M.O.); (A.S.); (A.I.); (Ș.B.)
| | - Constantin Munteanu
- Neuromuscular Rehabilitation Clinic Division, Teaching Emergency Hospital” Bagdasar-Arseni”, 041915 Bucharest, Romania; (A.A.); (C.P.)
- Faculty of Medical Bioengineering, University of Medicine and Pharmacy” Grigore T. Popa”, 700115 Iași, Romania
- Correspondence: (G.O.); (C.M.)
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11
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Ehresman J, Cottrill E, Caplan JM, McDougall CG, Theodore N, Nyquist PA. Neuroprotective Role of Acidosis in Ischemia: Review of the Preclinical Evidence. Mol Neurobiol 2021; 58:6684-6696. [PMID: 34606050 DOI: 10.1007/s12035-021-02578-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 09/26/2021] [Indexed: 12/09/2022]
Abstract
Efforts to develop effective neuroprotective therapies for ischemic stroke have had little success to date. One promising approach to neuroprotection is ischemic postconditioning, which utilizes brief bouts of ischemia after acute ischemic stroke to elicit neuroprotection, although the mechanism is largely unknown. As the primary components of transient ischemia are local hypoxia and acidosis, and hypoxic postconditioning has had little success, it is possible that the acidosis component may be the primary driver. To address the evidence behind this, we performed a systematic review of preclinical studies focused on the neuroprotective role of transient acidosis after ischemia. Animal studies demonstrated that mild-to-moderate acidosis after ischemic events led to better functional neurologic outcomes with reduced infarct volumes, while severe acidosis often led to cerebral edema and worse functional outcomes. In vitro studies demonstrated that mild-to-moderate acidosis improves neuronal survival largely through two means: (1) inhibition of harmful superoxide formation in the excitotoxic pathway and (2) remodeling neuronal mitochondria to allow for efficient ATP production (i.e., oxidative phosphorylation), even in the absence of oxygen. Similar to the animal studies, acidotic postconditioning in humans would entail short cycles of carbon dioxide inhalation, which has already been demonstrated to be safe as part of a hypercapnic challenge when measuring cerebrovascular reactivity. Due to the preclinical efficacy of acidotic postconditioning, its relatively straightforward translation into humans, and the growing need for neuroprotective therapies, future preclinical studies should focus on filling the current knowledge gaps that are currently restricting the development of phase I/II clinical trials.
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Affiliation(s)
- Jeff Ehresman
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Phipps 416, 600 N. Wolfe St., Baltimore, MD, 21287, USA
| | - Ethan Cottrill
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Phipps 416, 600 N. Wolfe St., Baltimore, MD, 21287, USA
| | - Justin M Caplan
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Phipps 416, 600 N. Wolfe St., Baltimore, MD, 21287, USA
| | - Cameron G McDougall
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Phipps 416, 600 N. Wolfe St., Baltimore, MD, 21287, USA
| | - Nicholas Theodore
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Phipps 416, 600 N. Wolfe St., Baltimore, MD, 21287, USA
| | - Paul A Nyquist
- Department of Neurology, Johns Hopkins University School of Medicine, Phipps 416, 600 N. Wolfe St., Baltimore, MD, 21287, USA.
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12
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Sheng R, Chen JL, Qin ZH. Cerebral conditioning: Mechanisms and potential clinical implications. BRAIN HEMORRHAGES 2021. [DOI: 10.1016/j.hest.2021.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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13
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Quade BN, Parker MD, Occhipinti R. The therapeutic importance of acid-base balance. Biochem Pharmacol 2021; 183:114278. [PMID: 33039418 PMCID: PMC7544731 DOI: 10.1016/j.bcp.2020.114278] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 10/06/2020] [Indexed: 02/06/2023]
Abstract
Baking soda and vinegar have been used as home remedies for generations and today we are only a mouse-click away from claims that baking soda, lemon juice, and apple cider vinegar are miracles cures for everything from cancer to COVID-19. Despite these specious claims, the therapeutic value of controlling acid-base balance is indisputable and is the basis of Food and Drug Administration-approved treatments for constipation, epilepsy, metabolic acidosis, and peptic ulcers. In this narrative review, we present evidence in support of the current and potential therapeutic value of countering local and systemic acid-base imbalances, several of which do in fact involve the administration of baking soda (sodium bicarbonate). Furthermore, we discuss the side effects of pharmaceuticals on acid-base balance as well as the influence of acid-base status on the pharmacokinetic properties of drugs. Our review considers all major organ systems as well as information relevant to several clinical specialties such as anesthesiology, infectious disease, oncology, dentistry, and surgery.
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Affiliation(s)
- Bianca N Quade
- Department of Physiology and Biophysics, The State University of New York, The University at Buffalo, Buffalo, NY 14203, USA
| | - Mark D Parker
- Department of Physiology and Biophysics, The State University of New York, The University at Buffalo, Buffalo, NY 14203, USA; Department of Ophthalmology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, The State University of New York, Buffalo, NY, USA; State University of New York Eye Institute, University at Buffalo, The State University of New York, Buffalo, NY, USA
| | - Rossana Occhipinti
- Department of Physiology and Biophysics, Case Western Reserve University, School of Medicine, Cleveland, OH 44106, USA.
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14
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Pan XW, Wang MJ, Gong SS, Sun MH, Wang Y, Zhang YY, Li F, Yu BY, Kou JP. YiQiFuMai Lyophilized Injection ameliorates tPA-induced hemorrhagic transformation by inhibiting cytoskeletal rearrangement associated with ROCK1 and NF-κB signaling pathways. JOURNAL OF ETHNOPHARMACOLOGY 2020; 262:113161. [PMID: 32730882 DOI: 10.1016/j.jep.2020.113161] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 04/29/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Thrombolytic therapy with tissue plasminogen activator (tPA) after ischemic stroke exacerbates blood-brain barrier (BBB) breakdown and leads to hemorrhagic transformation (HT). YiQiFuMai Lyophilized Injection (YQFM) is a modern preparation derived from Sheng-mai San (a traditional Chinese medicine). YQFM attenuates the BBB dysfunction induced by cerebral ischemia-reperfusion injury. However, whether YQFM can suppress tPA-induced HT remains unknown. AIM OF THE STUDY We investigated the therapeutic effect of YQFM on tPA-induced HT and explored the underlying mechanisms in vivo and in vitro to improve the safety of tPA use against stroke. METHODS Male C57BL/6J mice were subjected to 45 min of ischemia and 24 h of reperfusion. tPA (10 mg/kg) were infused 2 h after occlusion and YQFM (0.671 g/kg) was injected 2.5 h after occlusion. The in vitro effect of YQFM (100, 200, 400 μg/mL) on tPA (60 μg/mL)-induced dysfunction of the microvascular endothelial barrier in the brain following oxygen-glucose deprivation/reoxygenation (OGD/R) was observed in bEnd.3 cells. RESULTS YQFM suppressed tPA-induced high hemoglobin level in the brain, mortality, neurologic severity score, BBB permeability, expression and activation of matrix metalloproteinase (MMP)-9 and MMP-2, and degradation of tight-junction proteins. Furthermore, YQFM significantly blocked tPA-induced brain microvascular endothelial permeability and phosphorylation of Rho-associated kinase (ROCK)1, myosin light chain (MLC), cofilin and p65 in vivo and in vitro. CONCLUSION YQFM suppressed tPA-induced HT by inhibiting cytoskeletal rearrangement linked with ROCK-cofilin/MLC pathways and inhibiting the nuclear factor-kappa B pathway to ameliorate BBB damage caused by tPA.
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Affiliation(s)
- Xue-Wei Pan
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing, 211198, PR China.
| | - Mei-Juan Wang
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing, 211198, PR China.
| | - Shuai-Shuai Gong
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing, 211198, PR China.
| | - Min-Hui Sun
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing, 211198, PR China.
| | - Yan Wang
- Departments of Neurology, University of California, Davis, School of Medicine and Shriners Hospital, Sacramento, CA, 95817, USA.
| | - Yuan-Yuan Zhang
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing, 211198, PR China.
| | - Fang Li
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing, 211198, PR China.
| | - Bo-Yang Yu
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing, 211198, PR China.
| | - Jun-Ping Kou
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Pharmacology of Chinese Material Medica, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing, 211198, PR China.
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15
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Ritzel RM, He J, Li Y, Cao T, Khan N, Shim B, Sabirzhanov B, Aubrecht T, Stoica BA, Faden AI, Wu LJ, Wu J. Proton extrusion during oxidative burst in microglia exacerbates pathological acidosis following traumatic brain injury. Glia 2020; 69:746-764. [PMID: 33090575 PMCID: PMC7819364 DOI: 10.1002/glia.23926] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 10/01/2020] [Accepted: 10/07/2020] [Indexed: 01/02/2023]
Abstract
Acidosis is among the least studied secondary injury mechanisms associated with neurotrauma. Acute decreases in brain pH correlate with poor long‐term outcome in patients with traumatic brain injury (TBI), however, the temporal dynamics and underlying mechanisms are unclear. As key drivers of neuroinflammation, we hypothesized that microglia directly regulate acidosis after TBI, and thereby, worsen neurological outcomes. Using a controlled cortical impact model in adult male mice we demonstrate that intracellular pH in microglia and extracellular pH surrounding the lesion site are significantly reduced for weeks after injury. Microglia proliferation and production of reactive oxygen species (ROS) were also increased during the first week, mirroring the increase in extracellular ROS levels seen around the lesion site. Microglia depletion by a colony stimulating factor 1 receptor (CSF1R) inhibitor, PLX5622, markedly decreased extracellular acidosis, ROS production, and inflammation in the brain after injury. Mechanistically, we identified that the voltage‐gated proton channel Hv1 promotes oxidative burst activity and acid extrusion in microglia. Compared to wildtype controls, microglia lacking Hv1 showed reduced ability to generate ROS and extrude protons. Importantly, Hv1‐deficient mice exhibited reduced pathological acidosis and inflammation after TBI, leading to long‐term neuroprotection and functional recovery. Our data therefore establish the microglial Hv1 proton channel as an important link that integrates inflammation and acidosis within the injury microenvironment during head injury.
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Affiliation(s)
- Rodney M Ritzel
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Junyun He
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Yun Li
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Tuoxin Cao
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Niaz Khan
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Bosung Shim
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Boris Sabirzhanov
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Taryn Aubrecht
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Bogdan A Stoica
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Alan I Faden
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland, USA.,University of Maryland Center to Advance Chronic Pain Research, University of Maryland, Baltimore, Maryland, USA
| | - Long-Jun Wu
- Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | - Junfang Wu
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, Maryland, USA.,University of Maryland Center to Advance Chronic Pain Research, University of Maryland, Baltimore, Maryland, USA
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16
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Khan H, Kashyap A, Kaur A, Singh TG. Pharmacological postconditioning: a molecular aspect in ischemic injury. J Pharm Pharmacol 2020; 72:1513-1527. [PMID: 33460133 DOI: 10.1111/jphp.13336] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 06/21/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Ischaemia/reperfusion (I/R) injury is defined as the damage to the tissue which is caused when blood supply returns to tissue after ischaemia. To protect the ischaemic tissue from irreversible injury, various protective agents have been studied but the benefits have not been clinically applicable due to monotargeting, low potency, late delivery or poor tolerability. KEY FINDINGS Strategies involving preconditioning or postconditioning can address the issues related to the failure of protective therapies. In principle, postconditioning (PoCo) is clinically more applicable in the conditions in which there is unannounced ischaemic event. Moreover, PoCo is an attractive beneficial strategy as it can be induced rapidly at the onset of reperfusion via series of brief I/R cycles following a major ischaemic event or it can be induced in a delayed manner. Various pharmacological postconditioning (pPoCo) mechanisms have been investigated systematically. Using different animal models, most of the studies on pPoCo have been carried out preclinically. SUMMARY However, there is a need for the optimization of the clinical protocols to quicken pPoCo clinical translation for future studies. This review summarizes the involvement of various receptors and signalling pathways in the protective mechanisms of pPoCo.
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Affiliation(s)
- Heena Khan
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Ankita Kashyap
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Amarjot Kaur
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
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17
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Zeng Q, Zhou Y, Liang D, He H, Liu X, Zhu R, Zhang M, Luo X, Wang Y, Huang G. Exosomes Secreted From Bone Marrow Mesenchymal Stem Cells Attenuate Oxygen-Glucose Deprivation/Reoxygenation-Induced Pyroptosis in PC12 Cells by Promoting AMPK-Dependent Autophagic Flux. Front Cell Neurosci 2020; 14:182. [PMID: 32765221 PMCID: PMC7379865 DOI: 10.3389/fncel.2020.00182] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 05/28/2020] [Indexed: 12/14/2022] Open
Abstract
Background: Cerebral ischemia–reperfusion (I/R) injury can lead to severe dysfunction, and its treatment is difficult. It is reported that nucleotide-binding domain and leucine-rich repeat family protein 3 (NLRP3) inflammasome-mediated cell pyroptosis is an important part of cerebral I/R injury and the activation of autophagy can inhibit pyroptosis in some tissue injury. Our previous study found that the protective effects of bone marrow mesenchymal stem cells (BMSCs) in cerebral I/R injury may be associated with the regulation of autophagy. Recent studies have demonstrated that exosomes secreted from BMSCs (BMSC-Exos) may play an essential role in the effective biological performance of BMSCs and the protective mechanism of BMSC-Exos is associated with the activation of autophagy and the remission of inflammation, but it has not been reported in studies of cerebral I/R injury. We aimed to investigate the effects of BMSC-Exos on cerebral I/R injury and determine if the mechanism is associated with the regulation of pyroptosis and autophagic flux. Method: PC12 cells were subjected to oxygen-glucose deprivation/reoxygenation (OGD/R) to induce cerebral I/R in vitro and were cocultured with BMSC-Exos. Cell viability was determined with CCK-8 and lactate dehydrogenase (LDH) detection kits. Scanning electron microscopy (SEM), Hoechst 33342/propidium iodide (PI) double staining, 2′,7′-dichlorodihydrofluorescein diacetate assay, immunofluorescence, Western blot, and Enzyme-linked immunosorbent assay (ELISA) were used to detect cell pyroptosis. Furthermore, transmission electron microscopy (TEM), GFP-RFP-LC3 adenovirus transfection, and Western blot were used to detect autophagic flux and its influence on pyroptosis. Finally, coimmunoprecipitation was used to detect the binding interaction between NLRP3 and LC3. Results: BMSC-Exos increased cell viability in OGD/R. The inhibitory effect of BMSC-Exos on pyroptosis was comparable to the NLRP3 inhibitor MCC950 and was reversed by NLRP3 overexpression. Furthermore, BMSC-Exos promoted autophagic flux through the AMP-activated kinase (AMPK)/mammalian target of the rapamycin pathway, whereas chloroquine, AMPK silencing, and compound C blocked the inhibitory effect on pyroptosis. Conclusions: BMSC-Exos can protect PC12 cells against OGD/R injury via attenuation of NLRP3 inflammasome-mediated pyroptosis by promoting AMPK-dependent autophagic flux.
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Affiliation(s)
- Qing Zeng
- Department of Rehabilitation Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Rehabilitation Medical School, Southern Medical University, Guangzhou, China
| | - Yuqing Zhou
- Department of Rehabilitation Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Rehabilitation Medical School, Southern Medical University, Guangzhou, China
| | - Donghui Liang
- Department of Traditional Chinese Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - He He
- Department of Rehabilitation Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Rehabilitation Medical School, Southern Medical University, Guangzhou, China
| | - Xiaoli Liu
- Department of Rehabilitation Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Rehabilitation Medical School, Southern Medical University, Guangzhou, China
| | - Rui Zhu
- Department of Rehabilitation Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Rehabilitation Medical School, Southern Medical University, Guangzhou, China
| | - Meimei Zhang
- Department of Rehabilitation Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Rehabilitation Medical School, Southern Medical University, Guangzhou, China
| | - Xun Luo
- Kerry Rehabilitation Medicine Research Institute, Shenzhen, China.,Shenzhen Sanming Project Group, Spaulding Rehabilitation Hospital, Harvard Medical School, Charlestown, MA, United States
| | - Yao Wang
- Department of Rehabilitation Medicine, Shenzhen Dapeng New District Nan'ao People's Hospital, Shenzhen, China
| | - Guozhi Huang
- Department of Rehabilitation Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Rehabilitation Medical School, Southern Medical University, Guangzhou, China
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18
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Tumor Necrosis Factor Receptor-Associated Protein 1 Protects against Mitochondrial Injury by Preventing High Glucose-Induced mPTP Opening in Diabetes. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:6431517. [PMID: 32215175 PMCID: PMC7079224 DOI: 10.1155/2020/6431517] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Accepted: 01/23/2020] [Indexed: 01/14/2023]
Abstract
Diabetic kidney disease (DKD) has become the leading cause of end-stage renal disease worldwide. Renal tubular epithelial cell apoptosis and tubular atrophy have been recognized as indicators of the severity and progression of DKD, while the mechanism remains elusive. Tumor necrosis factor receptor-associated protein 1 (TRAP1) plays critical roles in apoptosis. The aim of this study was to investigate the protective role TRAP1 plays in DKD and to study the potential underlying mechanisms. TRAP1 expression was decreased, and mitochondria were injured in NRK-52e cells under high-glucose (HG) conditions. The overexpression of TRAP1 ameliorated HG-induced apoptosis, increased cell viability, maintained mitochondrial morphology, adenosine triphosphate (ATP) levels, and mitochondrial membrane potential (MMP), and buffered oxidative stress, whereas TRAP1 knockdown aggravated these effects. The protective effects of TRAP1 may be exerted via the inhibition of mitochondrial permeability transition pore (mPTP) opening, and the damage caused by TRAP1 knockdown can be partially reversed by treatment with the mPTP opening inhibitor cyclosporin A (CsA). In vivo, TRAP1 expression upregulation by AAV2/9 injection prevented renal dysfunction, ameliorated histopathological changes, maintained mitochondrial morphology and function, and reduced apoptosis and reactive oxygen species (ROS) in STZ-treated DKD rats. Thus, our results suggest that TRAP1 ameliorates diabetes-induced renal injury by preventing abnormal mPTP opening and maintaining mitochondrial structure and function, which may be treated as a potential target for DKD treatment.
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19
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Collateral augmentation treatment with a combination of acetazolamide and head-down tilt in a rat ischemic stroke model. J Clin Neurosci 2020; 73:252-258. [PMID: 32037062 DOI: 10.1016/j.jocn.2020.01.079] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 01/27/2020] [Indexed: 11/24/2022]
Abstract
Cerebral collaterals is crucially important in the pathophysiology of acute ischemic stroke and associated with outcome after reperfusion therapy. We explored the effectiveness of collateral augmentation treatment with a combination of acetazolamide (ACZ) and head-down tilt (HDT) in the transient middle cerebral artery occlusion (MCAO) rat model. Transient MCAO was induced in all animals for 1.5 h, followed by reperfusion for 22.5 h. Seventy-two male Wistar rats were divided into four treatment groups: control, ACZ, HDT, and combination. Twenty sham rats, which underwent surgery, were randomly allocated to these groups. Twenty-four hours after MCAO or sham surgery, we measured the infarction volume, brain edema (aquaporin-4 [AQP4], and brain water content), and neurological deficits (Garcia and Longa tests). Collateral augmentation treatments were associated with reduced infarction volume, less brain edema, and better neurological outcomes compared with untreated animals. More specifically, ACZ and HDT treatments resulted in small infarction volumes, and HDT was associated with a low AQP4 expression and improved neurological score, while the combination of ACZ and HDT improved neurological scores and reduced brain water content. This study shows that collateral augmentation treatments are associated with a better stroke prognosis compared with untreated animals after transient MCAO. The combination of ACZ and HDT seems to have some synergistic effect, but was not proven to be superior to HDT treatment alone.
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20
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Zhang X, Liu Z, Shu Q, Yuan S, Xing Z, Song J. LncRNA SNHG6 functions as a ceRNA to regulate neuronal cell apoptosis by modulating miR-181c-5p/BIM signalling in ischaemic stroke. J Cell Mol Med 2019; 23:6120-6130. [PMID: 31334597 PMCID: PMC6714173 DOI: 10.1111/jcmm.14480] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 04/04/2019] [Accepted: 04/28/2019] [Indexed: 12/11/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) play important roles in the pathogenesis of brain and neurodegenerative disorders. As far as we know, the functions and potential mechanisms of small nucleolar RNA host gene 6 (SNHG6) in ischaemic stroke have not been explored. This study aimed to examine the functional role of SNHG6 in the ischaemic stroke. Middle cerebral artery occlusion (MCAO) in mice and the oxygen glucose deprivation (OGD)-induced injury in neuronal cells were applied to mimic ischaemic stroke. TTC staining, quantitative real-time PCR, cell apoptosis assay, caspase-3 activity assay, Western blot, RNA immunoprecipitation and luciferase reporter assay were performed to evaluate the function and possible mechanisms of SNHG6 in the pathogenesis of ischaemic stroke. The results show that SNHG6 expression was significantly increased both OGD-induced neuronal cells and MCAO model mice. In vitro results showed that inhibition of SNHG6 increased cell viability, inhibited cell apoptosis and caspase-3 activity in OGD-induced neuronal cells. Consistently, knockdown of SNHG6 reduced brain infarct size and improved neurological scores in the MCAO mice. Mechanistic study further revealed that SNHG6 functioned as a competing endogenous RNA (ceRNA) for miR-181c-5p, which in turn repressed its downstream target of Bcl-2 interacting mediator of cell death (BIM) and inhibiting cell apoptosis. This study revealed a novel function of SNHG6 in the modulating neuronal apoptosis in the ischaemic stroke model, and the role of SNHG6 in the regulating of neuronal apoptosis was at least partly via targeting miR-181c-5p/BIM signalling pathway.
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Affiliation(s)
- Xi'an Zhang
- Department of NeurosurgeryThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anChina
- Department of NeurosurgeryThe Ninth Hospital of Xi'anXi'anChina
| | - Zhanhui Liu
- Department of NeurosurgeryThe Ninth Hospital of Xi'anXi'anChina
| | - Qing Shu
- Department of PharmacyThe Ninth Hospital of Xi'anXi'anChina
| | - Shanqi Yuan
- Department of NeurosurgeryThe Ninth Hospital of Xi'anXi'anChina
| | - Zhiguo Xing
- Department of NeurosurgeryThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anChina
| | - Jinning Song
- Department of NeurosurgeryThe First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anChina
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21
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Zhan L, Liu D, Wen H, Hu J, Pang T, Sun W, Xu E. Hypoxic postconditioning activates the Wnt/β-catenin pathway and protects against transient global cerebral ischemia through Dkk1 Inhibition and GSK-3β inactivation. FASEB J 2019; 33:9291-9307. [PMID: 31120770 DOI: 10.1096/fj.201802633r] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The Wingless/Int (Wnt)/β-catenin pathway plays an essential role in cell survival. Although postconditioning with 8% oxygen can alleviate transient global cerebral ischemia (tGCI)-induced neuronal damage in hippocampal CA1 subregion in adult rats as demonstrated by our previous studies, little is understood about the role of Wnt/β-catenin pathway in hypoxic postconditioning (HPC)-induced neuroprotection. This study tried to investigate the involvement of Wnt/β-catenin pathway in HPC-induced neuroprotection against tGCI and explore the underlying molecular mechanism thereof. We observed that HPC elevated nuclear β-catenin level as well as increased Wnt3a and decreased Dickkopf-1 (Dkk1) expression in CA1 after tGCI. Accordingly, HPC enhanced the expression of survivin and reduced the ratio of B-cell lymphoma/lewkmia-2 (Bcl-2)-associated X protein (Bax) to Bcl-2 following reperfusion. Moreover, our study has shown that these effects of HPC were abolished by lentivirus-mediated overexpression of Dkk1, and that the overexpression of Dkk1 completely reversed HPC-induced neuroprotection. Furthermore, HPC suppressed the activity of glycogen synthase kinase-3β (GSK-3β) in CA1 after tGCI, and the inhibition of GSK-3β activity with SB216763 increased the nuclear accumulation of β-catenin, up-regulated the expression of survivin, and reduced the ratio of Bax to Bcl-2, thus preventing the delayed neuronal death after tGCI. Finally, the administration of LY294002, an inhibitor of PI3K, increased GSK-3β activity and blocked nuclear β-catenin accumulation, thereby decreasing survivin expression and elevating the Bax-to-Bcl-2 ratio after HPC. These results suggest that activation of the Wnt/β-catenin pathway through Dkk1 inhibition and PI3K/protein kinase B pathway-mediated GSK-3β inactivation contributes to the neuroprotection of HPC against tGCI.-Zhan, L., Liu, D., Wen, H., Hu, J., Pang, T., Sun, W., Xu, E. Hypoxic postconditioning activates the Wnt/β-catenin pathway and protects against transient global cerebral ischemia through Dkk1 inhibition and GSK-3β inactivation.
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Affiliation(s)
- Lixuan Zhan
- Institute of Neurosciences and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou, China.,Beijing Key Laboratory of Hypoxia Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Dandan Liu
- Institute of Neurosciences and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou, China
| | - Haixia Wen
- Institute of Neurosciences and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou, China
| | - Jiaoyue Hu
- Institute of Neurosciences and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou, China
| | - Taoyan Pang
- Institute of Neurosciences and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou, China
| | - Weiwen Sun
- Institute of Neurosciences and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou, China
| | - En Xu
- Institute of Neurosciences and Department of Neurology of the Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou, China
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22
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Zhu MY, Zhang DL, Zhou C, Chai Z. Mild Acidosis Protects Neurons during Oxygen-Glucose Deprivation by Reducing Loss of Mitochondrial Respiration. ACS Chem Neurosci 2019; 10:2489-2497. [PMID: 30835994 DOI: 10.1021/acschemneuro.8b00737] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Brain ischemia is often accompanied by brain acidosis and this acidosis can affect ischemic neuronal injury. Ischemic neuronal injury is initiated by a decrease in ATP production which mainly relies on mitochondrial oxidative phosphorylation. Ischemia often causes mitochondrial dysfunction, and acidosis has been found to affect mitochondrial function, suggesting that acidosis accompanying ischemia may influence neurons by targeting mitochondrial metabolism. However, the effects of acidosis on mitochondrial energy metabolism during ischemia lacks thorough investigation. Here, we found that mild acidosis significantly reduced neuronal death possibly by slowing the process of ATP deprivation during oxygen-glucose deprivation (OGD), an in vitro ischemic model. The maintaining of neuronal ATP depended on protecting mitochondrial ATP production. Further investigation of mitochondrial function revealed that mild acidosis alleviated OGD-induced collapse of mitochondrial membrane potentials as well as damage to respiratory function, at least in part by reducing impacts on complex I and II activities. Inhibition of complex I activity aggravated neuronal death, which suggests that the contribution of mild acidosis to maintaining complex I activity promoted neuronal survival during OGD. Our findings reveal maintaining mitochondrial respiration as a new possible protective mechanism of mild acidosis during ischemia, on neurons.
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Affiliation(s)
- Ming-Yue Zhu
- State Key Laboratory of Membrane Biology, School of Life Sciences, Peking University, Beijing 100871, China
| | - Dong-Liang Zhang
- State Key Laboratory of Membrane Biology, School of Life Sciences, Peking University, Beijing 100871, China
| | - Chen Zhou
- State Key Laboratory of Membrane Biology, School of Life Sciences, Peking University, Beijing 100871, China
| | - Zhen Chai
- State Key Laboratory of Membrane Biology, School of Life Sciences, Peking University, Beijing 100871, China
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23
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Taş YÇ, Solaroğlu İ, Gürsoy-Özdemir Y. Spreading Depolarization Waves in Neurological Diseases: A Short Review about its Pathophysiology and Clinical Relevance. Curr Neuropharmacol 2019; 17:151-164. [PMID: 28925885 PMCID: PMC6343201 DOI: 10.2174/1570159x15666170915160707] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 09/03/2017] [Accepted: 09/09/2017] [Indexed: 02/05/2023] Open
Abstract
Lesion growth following acutely injured brain tissue after stroke, subarachnoid hemorrhage and traumatic brain injury is an important issue and a new target area for promising therapeutic interventions. Spreading depolarization or peri-lesion depolarization waves were demonstrated as one of the significant contributors of continued lesion growth. In this short review, we discuss the pathophysiology for SD forming events and try to list findings detected in neurological disorders like migraine, stroke, subarachnoid hemorrhage and traumatic brain injury in both human as well as experimental studies. Pharmacological and non-pharmacological treatment strategies are highlighted and future directions and research limitations are discussed.
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Affiliation(s)
| | | | - Yasemin Gürsoy-Özdemir
- Address correspondence to these authors at the Department of Neurosurgery, School of Medicine, Koç University, İstanbul, Turkey; Tel: +90 850 250 8250; E-mails: ,
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24
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Fan W, Li X, Huang L, He S, Xie Z, Fu Y, Fang W, Li Y. S-oxiracetam ameliorates ischemic stroke induced neuronal apoptosis through up-regulating α7 nAChR and PI3K / Akt / GSK3β signal pathway in rats. Neurochem Int 2018; 115:50-60. [DOI: 10.1016/j.neuint.2018.01.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 12/29/2017] [Accepted: 01/16/2018] [Indexed: 01/01/2023]
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25
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Lee JY, Alexeyev M, Kozhukhar N, Pastukh V, White R, Stevens T. Carbonic anhydrase IX is a critical determinant of pulmonary microvascular endothelial cell pH regulation and angiogenesis during acidosis. Am J Physiol Lung Cell Mol Physiol 2018; 315:L41-L51. [PMID: 29631360 DOI: 10.1152/ajplung.00446.2017] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Carbonic anhydrase IX (CA IX) is highly expressed in rapidly proliferating and highly glycolytic cells, where it serves to enhance acid-regulatory capacity. Pulmonary microvascular endothelial cells (PMVECs) actively utilize aerobic glycolysis and acidify media, whereas pulmonary arterial endothelial cells (PAECs) primarily rely on oxidative phosphorylation and minimally change media pH. Therefore, we hypothesized that CA IX is critical to PMVEC angiogenesis because of its important role in regulating pH. To test this hypothesis, PMVECs and PAECs were isolated from Sprague-Dawley rats. CA IX knockout PMVECs were generated using the CRISPR-Cas9 technique. During serum-stimulated growth, mild acidosis (pH 6.8) did not affect cell counts of PMVECs, but it decreased PAEC cell number. Severe acidosis (pH 6.2) decreased cell counts of PMVECs and elicited an even more pronounced reduction of PAECs. PMVECs had a higher CA IX expression compared with PAECs. CA activity was higher in PMVECs compared with PAECs, and enzyme activity was dependent on the type IX isoform. Pharmacological inhibition and genetic ablation of CA IX caused profound dysregulation of extra- and intracellular pH in PMVECs. Matrigel assays revealed impaired angiogenesis of CA IX knockout PMVECs in acidosis. Lastly, pharmacological CA IX inhibition caused profound cell death in PMVECs, whereas genetic CA IX ablation had little effect on PMVEC cell death in acidosis. Thus CA IX controls PMVEC pH necessary for angiogenesis during acidosis. CA IX may contribute to lung vascular repair during acute lung injury that is accompanied by acidosis within the microenvironment.
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Affiliation(s)
- Ji Young Lee
- Department of Physiology and Cell Biology, University of South Alabama , Mobile, Alabama.,Department of Internal Medicine, University of South Alabama , Mobile, Alabama.,Division of Pulmonary and Critical Care Medicine, University of South Alabama , Mobile, Alabama.,Center for Lung Biology, University of South Alabama , Mobile, Alabama
| | - Mikhail Alexeyev
- Department of Physiology and Cell Biology, University of South Alabama , Mobile, Alabama.,Center for Lung Biology, University of South Alabama , Mobile, Alabama
| | - Natalya Kozhukhar
- Department of Physiology and Cell Biology, University of South Alabama , Mobile, Alabama.,Center for Lung Biology, University of South Alabama , Mobile, Alabama
| | - Viktoriya Pastukh
- Department of Physiology and Cell Biology, University of South Alabama , Mobile, Alabama.,Center for Lung Biology, University of South Alabama , Mobile, Alabama
| | - Roderica White
- Center for Healthy Communities, University of South Alabama , Mobile, Alabama
| | - Troy Stevens
- Department of Physiology and Cell Biology, University of South Alabama , Mobile, Alabama.,Department of Internal Medicine, University of South Alabama , Mobile, Alabama.,Center for Lung Biology, University of South Alabama , Mobile, Alabama
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26
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Xie R, Li J, Zhao H. The underlying mechanisms involved in the protective effects of ischemic postconditioning. CONDITIONING MEDICINE 2018; 1:73-79. [PMID: 29782624 PMCID: PMC5959054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Cerebral ischemic postconditioning (PostC) refers to a series of brief ischemia and reperfusion (I/R) cycles applied at the onset of reperfusion following an ischemic event. PostC has been shown to have neuroprotective effects, and represents a promising clinical strategy against cerebral ischemia-reperfusion injury. Many studies have indicated that cerebral PostC can effectively reduce neural cell death, cerebral edema and infarct size, improve cerebral circulation, and relieve inflammation, apoptosis and oxidative stress. In addition, several protective molecular pathways such as Akt, mTOR and MAPK have been shown to play a role in PostC-induced neuroprotection. PostC represents an attractive therapeutic option because of its ability to be induced rapidly or in a delayed fashion, as well as being inducible by pharmacological agents. As a potential clinical treatment, PostC is therapeutically translatable as it can be induced remotely. The underlying mechanisms of PostC have been systematically investigated, but still need to be comprehensively analyzed. As most PostC studies to date were conducted preclinically using animal models, future studies are needed to optimize protocols in order to accelerate the clinical translation of PostC.
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Affiliation(s)
- Rong Xie
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Jinquan Li
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Heng Zhao
- Department of Neurosurgery, Stanford University, Stanford, California, USA
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27
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Yuan Y, Zheng Y, Zhang X, Chen Y, Wu X, Wu J, Shen Z, Jiang L, Wang L, Yang W, Luo J, Qin Z, Hu W, Chen Z. BNIP3L/NIX-mediated mitophagy protects against ischemic brain injury independent of PARK2. Autophagy 2017; 13:1754-1766. [PMID: 28820284 DOI: 10.1080/15548627.2017.1357792] [Citation(s) in RCA: 184] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
Cerebral ischemia induces massive mitochondrial damage. These damaged mitochondria are cleared, thus attenuating brain injury, by mitophagy. Here, we identified the involvement of BNIP3L/NIX in cerebral ischemia-reperfusion (I-R)-induced mitophagy. Bnip3l knockout (bnip3l-/-) impaired mitophagy and aggravated cerebral I-R injury in mice, which can be rescued by BNIP3L overexpression. The rescuing effects of BNIP3L overexpression can be observed in park2-/- mice, which showed mitophagy deficiency after I-R. Interestingly, bnip3l and park2 double-knockout mice showed a synergistic mitophagy deficiency with I-R treatment, which further highlighted the roles of BNIP3L-mediated mitophagy as being independent from PARK2. Further experiments indicated that phosphorylation of BNIP3L serine 81 is critical for BNIP3L-mediated mitophagy. Nonphosphorylatable mutant BNIP3LS81A failed to counteract both mitophagy impairment and neuroprotective effects in bnip3l-/- mice. Our findings offer insights into mitochondrial quality control in ischemic stroke and bring forth the concept that BNIP3L could be a potential therapeutic target for ischemic stroke, beyond its accepted role in reticulocyte maturation.
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Affiliation(s)
- Yang Yuan
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China , Zhejiang University , Hangzhou , China
| | - Yanrong Zheng
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China , Zhejiang University , Hangzhou , China
| | - Xiangnan Zhang
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China , Zhejiang University , Hangzhou , China.,b Collaborative Innovation Center for Infectious Diseases, The First Affiliated Hospital, School of Medicine , Zhejiang University , Hangzhou , China
| | - Ying Chen
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China , Zhejiang University , Hangzhou , China
| | - Xiaoli Wu
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China , Zhejiang University , Hangzhou , China
| | - Jiaying Wu
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China , Zhejiang University , Hangzhou , China
| | - Zhe Shen
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China , Zhejiang University , Hangzhou , China
| | - Lei Jiang
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China , Zhejiang University , Hangzhou , China
| | - Lu Wang
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China , Zhejiang University , Hangzhou , China
| | - Wei Yang
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China , Zhejiang University , Hangzhou , China
| | - Jianhong Luo
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China , Zhejiang University , Hangzhou , China
| | - Zhenghong Qin
- c Department of Pharmacology and Laboratory of Aging and Nervous Diseases, Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases , Soochow University School of Pharmaceutical Science , Suzhou , China
| | - Weiwei Hu
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China , Zhejiang University , Hangzhou , China.,b Collaborative Innovation Center for Infectious Diseases, The First Affiliated Hospital, School of Medicine , Zhejiang University , Hangzhou , China
| | - Zhong Chen
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China , Zhejiang University , Hangzhou , China.,b Collaborative Innovation Center for Infectious Diseases, The First Affiliated Hospital, School of Medicine , Zhejiang University , Hangzhou , China
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28
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Zheng Y, Shen Z, Wu X, Jiang L, Hu W, Chen Z, Zhang X. Experimental Models to Study the Neuroprotection of Acidic Postconditioning Against Cerebral Ischemia. J Vis Exp 2017. [PMID: 28784980 DOI: 10.3791/55931] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Stroke is one of the leading causes of mortality and disability worldwide, with limited therapeutic approaches. As an endogenous strategy for neuroprotection, postconditioning treatments have proven to be promising therapies against cerebral ischemia. However, complicated procedures and potential safety issues limit their clinical application. To overcome these disadvantages, we have developed acidic postconditioning (APC) as a therapy for experimental focal cerebral ischemia. APC refers to the mild acidosis treatment by inhaling CO2 during reperfusion following ischemia. Here we present two models to execute APC in vitro and in vivo, respectively. The oxygen-glucose deprivation (OGD) treatment of mice and the corticostriatal occlusion and middle cerebral artery occlusion (MCAO) of mice were employed to mimic cerebral ischemia. APC can be simply achieved by transferring brain slices to acidic buffer bubbled with 20% CO2, or by mice inhaling 20% CO2. APC showed significant protective effects against cerebral ischemia, as reflected by tissue viability and brain infarct volume.
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Affiliation(s)
- Yanrong Zheng
- Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University
| | - Zhe Shen
- Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University
| | - Xiaoli Wu
- Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University
| | - Lei Jiang
- Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University
| | - Weiwei Hu
- Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University
| | - Zhong Chen
- Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University;
| | - Xiangnan Zhang
- Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences, Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University;
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29
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Postconditioning-induced neuroprotection, mechanisms and applications in cerebral ischemia. Neurochem Int 2017; 107:43-56. [DOI: 10.1016/j.neuint.2017.01.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 01/04/2017] [Accepted: 01/08/2017] [Indexed: 02/07/2023]
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30
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Zhang J, Zhang Y, Xu T, Pan SJ, Nie G, Miao XY, Qiu JY, Yu WQ, Zhang SY, Liang TB. Severe traumatic hemorrhagic shock induces compromised immune barrier function of the mesenteric lymph node leading to an increase in intestinal bacterial translocation. Am J Transl Res 2017; 9:2363-2373. [PMID: 28559986 PMCID: PMC5446518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 04/26/2017] [Indexed: 06/07/2023]
Abstract
Critically ill patients have increased susceptibility to translocation of gut bacteria. However, the mechanisms are complicated and remain unclear, and the aim of this study was to explore these mechanisms. Rats exposed to different levels of shock were orally administrated with bioluminescent Citrobacter. We found that severe shock caused an increase in bacterial translocation to the visceral organs, such as liver, spleen and blood, compared with mild shock. Surprisingly, bacterial translocation to mesenteric lymph node (MLN) was unchanged between the two shock groups. Various methods, including flow cytometry, a co-culture model and western blots, were used to evaluate MLN-associated immune function. Specifically, we focused on mesenteric lymph node dendritic cells (MLN-DCs), the critical antigen presenting cells involved in the construction of the immune barrier in MLN. We also found that severe shock impaired the phenotypic maturation of MLN-DCs and induced a tolerogenic phenotype. Furthermore, co-culture assays of DCs with naive CD4+ T cells showed that DCs subject to severe shock were more inclined to polarize native CD4+ T cells into Th2 and Treg cells. This study successfully reproduced the clinical phenomenon of severe shock resulting in increased bacterial translocation to extraintestinal tissues, and this may be related to the compromised immune barrier function of MLN, as maturation and function of MLN-DC's were badly impaired.
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Affiliation(s)
- Jian Zhang
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Pancreatic DiseaseChina
| | - Yun Zhang
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Pancreatic DiseaseChina
| | - Tao Xu
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Pancreatic DiseaseChina
| | - Sheng-Jing Pan
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Pancreatic DiseaseChina
| | - Gang Nie
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Pancreatic DiseaseChina
| | - Xiao-Yan Miao
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, Zhejiang, China
| | - Jun-Yu Qiu
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Pancreatic DiseaseChina
| | - Wen-Qiao Yu
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Pancreatic DiseaseChina
| | - Shao-Yang Zhang
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Pancreatic DiseaseChina
| | - Ting-Bo Liang
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Pancreatic DiseaseChina
- Zhejiang University, Collaborative Innovation Center for Cancer MedicineGuangzhou, China
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Shen Z, Zheng Y, Wu J, Chen Y, Wu X, Zhou Y, Yuan Y, Lu S, Jiang L, Qin Z, Chen Z, Hu W, Zhang X. PARK2-dependent mitophagy induced by acidic postconditioning protects against focal cerebral ischemia and extends the reperfusion window. Autophagy 2017; 13:473-485. [PMID: 28103118 PMCID: PMC5361599 DOI: 10.1080/15548627.2016.1274596] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Prompt reperfusion after cerebral ischemia is critical for neuronal survival. Any strategies that extend the limited reperfusion window will be of great importance. Acidic postconditioning (APC) is a mild acidosis treatment that involves inhaling CO2 during reperfusion following ischemia. APC attenuates ischemic brain injury although the underlying mechanisms have not been elucidated. Here we report that APC reinforces ischemia-reperfusion-induced mitophagy in middle cortical artery occlusion (MCAO)-treated mice, and in oxygen-glucose deprivation (OGD)-treated brain slices and neurons. Inhibition of mitophagy compromises neuroprotection conferred by APC. Furthermore, mitophagy and neuroprotection are abolished in Park2 knockout mice, indicating that APC-induced mitophagy is facilitated by the recruitment of PARK2 to mitochondria. Importantly, in MCAO mice, APC treatment extended the effective reperfusion window from 2 to 4 h, and this window was further extended to 6 h by exogenously expressing PARK2. Taken together, we found that PARK2-dependent APC-induced mitophagy renders the brain resistant to ischemic injury. APC treatment could be a favorable strategy to extend the thrombolytic time window for stroke therapy.
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Affiliation(s)
- Zhe Shen
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences , Department of Pharmacology , Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University , Hangzhou , China
| | - Yanrong Zheng
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences , Department of Pharmacology , Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University , Hangzhou , China
| | - Jiaying Wu
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences , Department of Pharmacology , Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University , Hangzhou , China
| | - Ying Chen
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences , Department of Pharmacology , Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University , Hangzhou , China
| | - Xiaoli Wu
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences , Department of Pharmacology , Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University , Hangzhou , China
| | - Yiting Zhou
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences , Department of Pharmacology , Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University , Hangzhou , China
| | - Yang Yuan
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences , Department of Pharmacology , Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University , Hangzhou , China
| | - Shousheng Lu
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences , Department of Pharmacology , Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University , Hangzhou , China
| | - Lei Jiang
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences , Department of Pharmacology , Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University , Hangzhou , China
| | - Zhenghong Qin
- b Department of Pharmacology and Laboratory of Aging and Nervous Diseases , Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, School of Pharmaceutical Science, Soochow University , Suzhou , China
| | - Zhong Chen
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences , Department of Pharmacology , Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University , Hangzhou , China
| | - Weiwei Hu
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences , Department of Pharmacology , Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University , Hangzhou , China
| | - Xiangnan Zhang
- a Institute of Pharmacology & Toxicology, College of Pharmaceutical Sciences , Department of Pharmacology , Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University , Hangzhou , China
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YiQiFuMai Powder Injection Ameliorates Cerebral Ischemia by Inhibiting Endoplasmic Reticulum Stress-Mediated Neuronal Apoptosis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:5493279. [PMID: 27087890 PMCID: PMC4818822 DOI: 10.1155/2016/5493279] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 02/04/2016] [Indexed: 02/05/2023]
Abstract
YiQiFuMai (YQFM) powder injection as a modern preparation derived from Sheng Mai San, a traditional Chinese medicine, has been widely used in the treatment of cardiovascular and cerebrovascular diseases. However, its neuroprotective effect and underlying mechanism in cerebral ischemia remain to be explored. The present study was designed to investigate the neuroprotective effect of YQFM on endoplasmic reticulum (ER) stress-mediated neuronal apoptosis in the permanent middle cerebral artery occlusion- (MCAO-) injured mice and the oxygen-glucose deprivation- (OGD-) induced pheochromocytoma (PC12) cells. The results showed that single administration of YQFM (1.342 g/kg, i.p.) could reduce the brain infarction and improve the neurological deficits and the cerebral blood flow (CBF) after MCAO for 24 h in mice. Moreover, incubation with YQFM (100, 200, and 400 μg/mL) could increase the cell viability, decrease the caspase-3 activity, and inhibit the cell apoptosis in OGD-induced PC12 cells for 12 h. In addition, YQFM treatment could significantly modulate cleaved caspase-3 and Bcl-2 expressions and inhibit the expressions of ER stress-related marker proteins and signaling pathways in vivo and in vitro. In conclusion, our findings provide the first evidence that YQFM ameliorates cerebral ischemic injury linked with modulating ER stress-related signaling pathways, which provided some new insights for its prevention and treatment of cerebral ischemia diseases.
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Jin Z, Wu J, Yan LJ. Chemical Conditioning as an Approach to Ischemic Stroke Tolerance: Mitochondria as the Target. Int J Mol Sci 2016; 17:351. [PMID: 27005615 PMCID: PMC4813212 DOI: 10.3390/ijms17030351] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 02/26/2016] [Accepted: 03/04/2016] [Indexed: 12/17/2022] Open
Abstract
It is well established that the brain can be prepared to resist or tolerate ischemic stroke injury, and mitochondrion is a major target for this tolerance. The preparation of ischemic stroke tolerance can be achieved by three major approaches: ischemic conditioning, hypoxic conditioning and chemical conditioning. In each conditioning approach, there are often two strategies that can be used to achieve the conditioning effects, namely preconditioning (Pre-C) and postconditioning (Post-C). In this review, we focus on chemical conditioning of mitochondrial proteins as targets for neuroprotection against ischemic stroke injury. Mitochondrial targets covered include complexes I, II, IV, the ATP-sensitive potassium channel (mitoKATP), adenine dinucleotide translocase (ANT) and the mitochondrial permeability transition pore (mPTP). While numerous mitochondrial proteins have not been evaluated in the context of chemical conditioning and ischemic stroke tolerance, the paradigms and approaches reviewed in this article should provide general guidelines on testing those mitochondrial components that have not been investigated. A deep understanding of mitochondria as the target of chemical conditioning for ischemic stroke tolerance should provide valuable insights into strategies for fighting ischemic stroke, a leading cause of death in the world.
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Affiliation(s)
- Zhen Jin
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, University of North Texas Health Science Center, Fort Worth, TX 76107, USA.
| | - Jinzi Wu
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, University of North Texas Health Science Center, Fort Worth, TX 76107, USA.
| | - Liang-Jun Yan
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, University of North Texas Health Science Center, Fort Worth, TX 76107, USA.
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Liu C, Du Q, Zhang X, Tang Z, Ji H, Li Y. Clematichinenoside Serves as a Neuroprotective Agent Against Ischemic Stroke: The Synergistic Action of ERK1/2 and cPKC Pathways. Front Cell Neurosci 2016; 9:517. [PMID: 26793066 PMCID: PMC4709476 DOI: 10.3389/fncel.2015.00517] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 12/23/2015] [Indexed: 12/18/2022] Open
Abstract
There are numerous evidences suggesting that inhibition of apoptosis of neurons play a critical role in preventing the damage and even death of neurons after brain ischemia/reperfusion, which shows therapeutic potential for clinical treatment of brain injury induced by stroke. In this study, we aimed to investigate the neuroprotective effect of Clematichinenoside (AR) and its underlying mechanisms. MCAO mode was performed in rats and OGD/R model in primary cortical neurons to investigate the neuroprotective effect of AR. The rate of apoptotic cells was measured using TUNEL assay in cerebral cortex and flow cytometric assay in cortical neurons. Apoptosis-related proteins such as bcl-2, bcl-xl, and bax and the phosphorylation of ERK1/2, cPKC, p90RSK, and CREB in ischemic penumbra were assayed by western blot. Furthermore, we made a thorough inquiry about how these proteins play roles in the anti-apoptotic mechanism using targets-associated inhibitors step by step. The results revealed that AR could activate both ERK1/2 and cPKC which resulted in p90RSK phosphorylation and translocation into the nucleus. Moreover, CREB, a downstream target of p90RSK, was phosphorylated and then bound to cAMP-regulated enhancer (CRE) to activate apoptosis-related genes, and finally ameliorate ischemic stroke through preventing neuron death. In conclusion, these data strongly suggest that AR could be used as an effective neuroprotective agent to protect against ischemic stroke after cerebral I/R injury through regulating both ERK1/2 and cPKC mediated p90RSK/CREB apoptotic pathways.
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Affiliation(s)
- Chao Liu
- State Key Laboratory of Natural Medicines, Department of Physiology, China Pharmaceutical University Nanjing, China
| | - Qianming Du
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University Nanjing, China
| | - Xu Zhang
- Department of Combine Traditional Chinese and Western Medicine, College of Clinical Medicine, Chengdu University of TCM Chengdu, China
| | - Zhichao Tang
- State Key Laboratory of Natural Medicines, Department of Pharmacochemistry, China Pharmaceutical University Nanjing, China
| | - Hui Ji
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University Nanjing, China
| | - Yunman Li
- State Key Laboratory of Natural Medicines, Department of Physiology, China Pharmaceutical University Nanjing, China
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Magalhães PADF, de Brito TS, Freire RS, da Silva MTB, dos Santos AA, Vale ML, de Menezes DB, Martins AMC, Libório AB. Metabolic acidosis aggravates experimental acute kidney injury. Life Sci 2016; 146:58-65. [PMID: 26773857 DOI: 10.1016/j.lfs.2016.01.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 11/30/2015] [Accepted: 01/06/2016] [Indexed: 01/13/2023]
Abstract
AIMS Ischemia/reperfusion (I/R) injury and metabolic acidosis (MA) are two critical conditions that may simultaneously occur in clinical practice. The result of this combination can be harmful to the kidneys, but this issue has not been thoroughly investigated. The present study evaluated the influence of low systemic pH on various parameters of kidney function in rats that were subjected to an experimental model of renal I/R injury. MAIN METHODS Metabolic acidosis was induced in male Wistar rats by ingesting ammonium chloride (NH4Cl) in tap water, beginning 2 days before ischemic insult and maintained during the entire study. Ischemia/reperfusion was induced by clamping both renal arteries for 45 min, followed by 48 h of reperfusion. Four groups were studied: control (subjected to sham surgery, n=8), I/R (n=8), metabolic acidosis (MA; 0.28 M NH4Cl solution and sham surgery, n=6), and MA+I/R (0.28 M NH4Cl solution plus I/R, n=9). KEY FINDINGS Compared with I/R rats, MA+I/R rats exhibited higher mortality (50 vs. 11%, p=0.03), significant reductions of blood pH, plasma bicarbonate (pBic), and standard base excess (SBE), with a severe decline in the glomerular filtration rate and tubular function. Microscopic tubular injury signals were detected. Immunofluorescence revealed that the combination of MA and I/R markedly increased nuclear factor κB (NF-κB) and heme-oxygenase 1 (HO-1), but it did not interfere with the decrease in endothelial nitric oxide synthase (eNOS) expression that was caused by I/R injury. SIGNIFICANCE Acute ischemic kidney injury is exacerbated by acidic conditions.
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Affiliation(s)
| | | | | | | | | | - Mariana Lima Vale
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, CE, Brazil
| | | | - Alice Maria Costa Martins
- Department of Clinical and Toxicological Analysis, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Alexandre Braga Libório
- Department of Clinical Medicine, Federal University of Ceará, Fortaleza, CE, Brazil; Universidade de Fortaleza, UNIFOR, Fortaleza, CE, Brazil
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Kwong KK, Chan ST. Neuroprotection and acidosis induced by cortical spreading depression. Neuropsychiatr Dis Treat 2016; 12:3191-3194. [PMID: 28003755 PMCID: PMC5161389 DOI: 10.2147/ndt.s125677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
- Kenneth K Kwong
- Department of Radiology, MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, MA, USA
| | - Suk-Tak Chan
- Department of Radiology, MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, MA, USA
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Histidine provides long-term neuroprotection after cerebral ischemia through promoting astrocyte migration. Sci Rep 2015; 5:15356. [PMID: 26481857 PMCID: PMC4611873 DOI: 10.1038/srep15356] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Accepted: 09/09/2015] [Indexed: 11/24/2022] Open
Abstract
The formation of glial scar impedes the neurogenesis and neural functional recovery following cerebral ischemia. Histamine showed neuroprotection at early stage after cerebral ischemia, however, its long-term effect, especially on glial scar formation, hasn’t been characterized. With various administration regimens constructed for histidine, a precursor of histamine, we found that histidine treatment at a high dose at early stage and a low dose at late stage demonstrated the most remarkable long-term neuroprotection with decreased infarct volume and improved neurological function. Notably, this treatment regimen also robustly reduced the glial scar area and facilitated the astrocyte migration towards the infarct core. In wound-healing assay and transwell test, histamine significantly promoted astrocyte migration. H2 receptor antagonists reversed the promotion of astrocyte migration and the neuroprotection provided by histidine. Moreover, histamine upregulated the GTP-bound small GTPase Rac1, while a Rac1 inhibitor, NSC23766, abrogated the neuroprotection of histidine and its promotion of astrocyte migration. Our data indicated that a dose/stage-dependent histidine treatment, mediated by H2 receptor, promoted astrocyte migration towards the infarct core, which benefited long-term post-cerebral ischemia neurological recovery. Therefore, targeting histaminergic system may be an effective therapeutic strategy for long-term cerebral ischemia injury through its actions on astrocytes.
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38
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Wu JY, Li M, Cao LJ, Sun ML, Chen D, Ren HG, Xia Q, Tao ZT, Qin ZH, Hu QS, Wang GH. Protease Omi cleaving Hax-1 protein contributes to OGD/R-induced mitochondrial damage in neuroblastoma N2a cells and cerebral injury in MCAO mice. Acta Pharmacol Sin 2015; 36:1043-52. [PMID: 26299953 DOI: 10.1038/aps.2015.50] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 05/04/2015] [Indexed: 12/31/2022] Open
Abstract
AIM In the penumbra after focal cerebral ischemia, an increase of protease Omi is linked to a decrease of Hs1-associated protein X-1 (Hax-1), a protein belonging to the Bcl-2 family. In this study we investigated the mechanisms underlying the regulation of Hax-1 by protease Omi in cerebral ischemia/reperfusion (I/R) injury. METHODS Mouse neuroblastoma N2a cells were subjected to oxygen-glucose deprivation and reoxygenation (OGD/R); cell viability was assessed with MTT assay. Mice underwent 2-h middle cerebral artery occlusion (MCAO) and reperfusion, and the infarct volume was determined with TTC staining. The expression of Omi and Hax-1 was detected using immunoblot and immunofluorescence assays. The mitochondrial membrane potential was measured using TMRM staining. RESULTS In the brains of MCAO mice, the protein level of Omi was significantly increased, while the protein level of Hax-1 was decreased. Similar changes were observed in OGD/R-treated N2a cells, but the mRNA level of Hax-1 was not changed. Furthermore, in OGD/R-treated N2a cells, knockdown of Omi significantly increased Hax-1 protein level. Immunofluorescence assay showed that Omi and Hax-1 were co-localized in mitochondria of N2a cells. OGD/R caused marked mitochondrial damage and apoptosis in N2a cells, while inhibition of Omi protease activity with UCF-101 (10 μmol/L) or overexpression of Hax-1 could restore the mitochondrial membrane potential and attenuate cell apoptosis. Moreover, pretreatment of MCAO mice with UCF-101 (7.15 mg/kg, ip) could restore Hax-1 expression, inhibit caspase activation, and significantly reduce the infarct volume. CONCLUSION Protease Omi impairs mitochondrial function by cleaving Hax-1, which induces apoptosis in OGD/R-treated N2a cells and causes I/R injury in MCAO mice.
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Detante O, Jaillard A, Moisan A, Barbieux M, Favre I, Garambois K, Barbier E, Hommel M. Fisiopatologia dell’ischemia cerebrale. Neurologia 2015. [DOI: 10.1016/s1634-7072(14)69823-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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40
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Shen Z, Jiang L, Yuan Y, Deng T, Zheng YR, Zhao YY, Li WL, Wu JY, Gao JQ, Hu WW, Zhang XN, Chen Z. Inhibition of G protein-coupled receptor 81 (GPR81) protects against ischemic brain injury. CNS Neurosci Ther 2014; 21:271-9. [PMID: 25495836 DOI: 10.1111/cns.12362] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 10/24/2014] [Accepted: 10/26/2014] [Indexed: 01/08/2023] Open
Abstract
AIM Lactates accumulate in ischemic brains. G protein-coupled receptor 81 (GPR81) is an endogenous receptor for lactate. We aimed to explore whether lactate is involved in ischemic injury via activating GPR81. METHODS N2A cells were transfected with GFP-GPR81 plasmids 24 h previously, and then treated with GPR81 antagonist 3-hydroxy-butyrate (3-OBA) alone or cotreated with agonists lactate or 3, 5-dihydroxybenzoic acid (3, 5-DHBA) during 3 h of oxygen-glucose deprivation (OGD). Adult male C57BL/6J mice and primary cultured cortical neurons were treated with 3-OBA at the onset of middle cerebral artery occlusion (MCAO) or OGD, respectively. RESULTS The GPR81 overexpression increased the cell vulnerability to ischemic injury. And GPR81 antagonism by 3-OBA significantly prevented cell death and brain injury after OGD and MCAO, respectively. Furthermore, inhibition of GPR81 reversed ischemia-induced apoptosis and extracellular signal-regulated kinase (ERK) signaling may be involved in the neuroprotection. CONCLUSIONS G protein-coupled receptor 81 (GPR81) inhibition attenuated ischemic neuronal death. Lactate may aggravate ischemic brain injury by activating GPR81. GPR81 antagonism might be a novel therapeutic strategy for the treatment of cerebral ischemia.
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Affiliation(s)
- Zhe Shen
- Department of Pharmacology, Key Laboratory of Medical Neurobiology of The Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
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Acidic pH increases cGMP accumulation through the OGR1/phospholipase C/Ca(2+)/neuronal NOS pathway in N1E-115 neuronal cells. Cell Signal 2014; 26:2326-32. [PMID: 25025574 DOI: 10.1016/j.cellsig.2014.07.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 07/09/2014] [Indexed: 12/29/2022]
Abstract
Neuronal NO synthase (nNOS)-mediated cGMP accumulation has been shown to affect a variety of neuronal cell activities, regardless of whether they are detrimental or beneficial, depending on the amount of their levels, under the physiological and pathological situations. In the present study, we examined the role of proton-sensing G protein-coupled receptors (GPCRs), which have been identified as new pH sensors, in the acidic pH-induced nNOS/cGMP activity in N1E-115 neuronal cells. In this cell line, ovarian cancer G protein-coupled receptor 1 (OGR1) and G protein-coupled receptor 4 (GPR4) mRNAs are expressed. An extracellular acidic pH increased cGMP accumulation, which was inhibited by nNOS-specific inhibitors. Acidic pH also activated phospholipase C/Ca(2+) pathways and Akt-induced phosphorylation of nNOS at S1412, both of which have been shown to be critical regulatory mechanisms for nNOS activation. The acidic pH-induced activation of the phospholipase C/Ca(2+) pathway, but not Akt/nNOS phosphorylation, was inhibited by small interfering RNA specific to OGR1 and YM-254890, an inhibitor of Gq/11 proteins, in association with the inhibition of cGMP accumulation. Moreover cGMP accumulation was inhibited by 2-aminoethoxydiphenyl borate, an inhibitor of inositol 1,4,5-trisphosphate channel; however, it was not by wortmannin, a phosphatidylinositol 3-kinase inhibitor, which inhibited Akt/nNOS phosphorylation. In conclusion, acidic pH stimulates cGMP accumulation preferentially through the OGR1/Gq/11 proteins/phospholipase C/Ca(2+)/nNOS in N1E-115 neuronal cells. Akt-mediated phosphorylation of nNOS, however, does not appreciably contribute to the acidification-induced accumulation of cGMP.
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Khacho M, Tarabay M, Patten D, Khacho P, MacLaurin JG, Guadagno J, Bergeron R, Cregan SP, Harper ME, Park DS, Slack RS. Acidosis overrides oxygen deprivation to maintain mitochondrial function and cell survival. Nat Commun 2014; 5:3550. [PMID: 24686499 PMCID: PMC3988820 DOI: 10.1038/ncomms4550] [Citation(s) in RCA: 139] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2013] [Accepted: 03/05/2014] [Indexed: 02/07/2023] Open
Abstract
Sustained cellular function and viability of high-energy demanding post-mitotic cells rely on the continuous supply of ATP. The utilization of mitochondrial oxidative phosphorylation for efficient ATP generation is a function of oxygen levels. As such, oxygen deprivation, in physiological or pathological settings, has profound effects on cell metabolism and survival. Here we show that mild extracellular acidosis, a physiological consequence of anaerobic metabolism, can reprogramme the mitochondrial metabolic pathway to preserve efficient ATP production regardless of oxygen levels. Acidosis initiates a rapid and reversible homeostatic programme that restructures mitochondria, by regulating mitochondrial dynamics and cristae architecture, to reconfigure mitochondrial efficiency, maintain mitochondrial function and cell survival. Preventing mitochondrial remodelling results in mitochondrial dysfunction, fragmentation and cell death. Our findings challenge the notion that oxygen availability is a key limiting factor in oxidative metabolism and brings forth the concept that mitochondrial morphology can dictate the bioenergetic status of post-mitotic cells. In hypoxic conditions, cells depend on anaerobic respiration, which results in extracellular acidosis. Khacho et al. find that acidosis serves a protective function, enhancing mitochondrial respiratory capacity and sustaining ATP synthesis despite limited oxygen availability, by both promoting mitochondrial fusion and inhibiting fission.
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Affiliation(s)
- Mireille Khacho
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Michelle Tarabay
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - David Patten
- 1] Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada [2]
| | - Pamela Khacho
- 1] Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada [2]
| | - Jason G MacLaurin
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Jennifer Guadagno
- Department of Physiology and Pharmacology, J. Allyn Taylor Centre for Cell Biology, Robarts Research Institute, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Richard Bergeron
- 1] Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada [2] Ottawa Hospital Research Institute, Ottawa, Ontario K1H 8M5, Canada
| | - Sean P Cregan
- Department of Physiology and Pharmacology, J. Allyn Taylor Centre for Cell Biology, Robarts Research Institute, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Mary-Ellen Harper
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - David S Park
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Ruth S Slack
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
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