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Park TH, Lee HG, Cho SY, Park SU, Jung WS, Park JM, Ko CN, Cho KH, Kwon S, Moon SK. A Comparative Study on the Neuroprotective Effect of Geopung-Chunghyuldan on In Vitro Oxygen-Glucose Deprivation and In Vivo Permanent Middle Cerebral Artery Occlusion Models. Pharmaceuticals (Basel) 2023; 16:ph16040596. [PMID: 37111353 PMCID: PMC10143156 DOI: 10.3390/ph16040596] [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: 02/01/2023] [Revised: 04/01/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
Geopung-Chunghyuldan (GCD), which is a mixture of Chunghyuldan (CD), Radix Salviae Miltiorrhizae, Radix Notoginseng, and Borneolum Syntheticum, is used to treat ischemic stroke in traditional Korean medicine. This study aimed to investigate the effects of GCD and CD on ischemic brain damage using in vitro and in vivo stroke models, as well as to elucidate the synergistic effects of GCD against ischemic insult. To study the effect of GCD in an in vitro ischemia model, SH-SY5Y cells were exposed to oxygen-glucose deprivation (OGD). Cell death after 16 h of OGD exposure was measured using the MTT assay and live/dead cell counting methods. An in vivo ischemia mice model was established through permanent middle cerebral artery occlusion (pMCAO). To determine the neuroprotective effect of GCD, it was orally administered immediately and 2 h after pMCAO. The infarct volume was measured through 2,3,5-triphenyltetrazolium chloride staining at 24 h after pMCAO. Compared with the control group, GCD treatment significantly reduced OGD-induced cell death in SH-SY5Y cells; however, CD treatment did not show a significant protective effect. In the pMCAO model, compared with the control group, treatment with GCD and CD significantly and mildly reduced the infarct volume, respectively. Our findings indicate that compared with CD, GCD may allow a more enhanced neuroprotective effect in acute ischemic stroke, indicating a potential synergistic neuroprotective effect. The possibility of GCD as a novel alternative choice for the prevention and treatment of ischemic stroke is suggested.
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Affiliation(s)
- Tae-Hoon Park
- Department of Korean Medicine Cardiology and Neurology, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Han-Gyul Lee
- Department of Cardiology and Neurology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Seung-Yeon Cho
- Department of Cardiology and Neurology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Seong-Uk Park
- Department of Cardiology and Neurology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Woo-Sang Jung
- Department of Cardiology and Neurology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Jung-Mi Park
- Department of Cardiology and Neurology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Chang-Nam Ko
- Department of Cardiology and Neurology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Ki-Ho Cho
- Department of Cardiology and Neurology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Seungwon Kwon
- Department of Cardiology and Neurology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Sang-Kwan Moon
- Department of Cardiology and Neurology, College of Korean Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
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Tanwar O, Soni A, Prajapat P, Shivhare T, Pandey P, Samaiya PK, Pandey SP, Kar P. Ethyl Pyruvate as a Potential Defense Intervention against Cytokine Storm in COVID-19? ACS OMEGA 2021; 6:7754-7760. [PMID: 33778286 PMCID: PMC7992141 DOI: 10.1021/acsomega.1c00157] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 02/23/2021] [Indexed: 06/12/2023]
Abstract
COVID-19 is a deadly pandemic and has resulted in a huge loss of money and life in the past few months. It is well known that the SARS-CoV-2 gene mutates relatively slowly as compared to other viruses but still may create hurdles in developing vaccines. Therefore, there is a need to develop alternative routes for its management and treatment of COVID-19. Based on the severity of viral infection in COVID-19 patients, critically ill patients (∼5%, with old age, and comorbidities) are at high risk of morbidities. The reason for this severity in such patients is attributed to "misleading cytokine storm", which produces ARDS and results in the deaths of critically ill patients. In this connection, ethyl pyruvate (EP) controls these cytokines/chemokines, is an anti-inflammatory agent, and possesses a protective effect on the lungs, brain, heart, and mitochondria against various injuries. Considering these facts, we propose that the site-selective EP formulations (especially aerosols) could be the ultimate adjuvant therapy for the regulation of misleading cytokine storm in severely affected COVID-19 patients and could reduce the mortalities.
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Affiliation(s)
- Omprakash Tanwar
- Department
of Pharmacy, Shri G.S. Institute of Technology
and Science, 23, Sir
M. Visvesvaraya Marg (Park Road), Indore 452003, Madhya Pradesh, India
| | - Aastha Soni
- Department
of Pharmacy, Shri G.S. Institute of Technology
and Science, 23, Sir
M. Visvesvaraya Marg (Park Road), Indore 452003, Madhya Pradesh, India
| | - Pawan Prajapat
- Department
of Pharmacy, Shri G.S. Institute of Technology
and Science, 23, Sir
M. Visvesvaraya Marg (Park Road), Indore 452003, Madhya Pradesh, India
| | - Tanu Shivhare
- Department
of Pharmacy, Shri G.S. Institute of Technology
and Science, 23, Sir
M. Visvesvaraya Marg (Park Road), Indore 452003, Madhya Pradesh, India
| | - Pooja Pandey
- Department
of Pharmacy, Shri G.S. Institute of Technology
and Science, 23, Sir
M. Visvesvaraya Marg (Park Road), Indore 452003, Madhya Pradesh, India
| | - Puneet Kumar Samaiya
- Department
of Pharmacy, Shri G.S. Institute of Technology
and Science, 23, Sir
M. Visvesvaraya Marg (Park Road), Indore 452003, Madhya Pradesh, India
| | - Sharad Prakash Pandey
- Department
of Pharmacy, Shri G.S. Institute of Technology
and Science, 23, Sir
M. Visvesvaraya Marg (Park Road), Indore 452003, Madhya Pradesh, India
| | - Parimal Kar
- Department
of Biosciences & Biomedical Engineering, Indian Institute of Technology, Khandwa Road, Simrol, Indore 453552, Madhya Pradesh, India
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Neuroprotective Effects of Ethyl Pyruvate against Aluminum Chloride-Induced Alzheimer's Disease in Rats via Inhibiting Toll-Like Receptor 4. J Mol Neurosci 2020; 70:836-850. [PMID: 32030557 DOI: 10.1007/s12031-020-01489-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 01/28/2020] [Indexed: 12/23/2022]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disease characterized by the formation of insoluble deposits of β-amyloid (Aβ) plaques within the parenchyma of the brain. The present study aimed to investigate the neuroprotective role of ethyl pyruvate against in vitro and in vivo model of aluminum chloride (AlCl3)-induced AD. Effect of ethyl pyruvate (5, 10, 20, 40 mM) against AlCl3 (1250 μM)-induced neurotoxicity in primary neuron-glial mixed cell culture was evaluated using cell viability assays (MTT assay as well as calcein-AM/propidium iodide fluorescent dyes). In vivo model, AlCl3 (50 mg/kg) were given through intraperitoneal route (i.p.) once daily for 4 weeks in rats and after 2 weeks, ethyl pyruvate (50, 100, 200 mg/kg/day) was co-administered with AlCl3 once daily via the oral route. The present study, in addition to perform histopathology of the brain, also estimated oxidant and antioxidant parameters as well as memory impairment using pole test, plus maze, and Morris water maze test. The binding mode of ethyl pyruvate in the hMD-2 was also studied. Results of in vitro studies showed that the AlCl3 administration resulted in neuronal cell death. AlCl3 administration in rats resulted in memory loss, oxidative stress (increased lipid peroxide and nitric oxide), impairment of antioxidant mechanisms (superoxide dismutase, catalase, and reduced glutathione), and deposition of amyloid plaques in cerebral cortex region of the brain. AlCl3 also resulted in the overexpression of the TLR4 receptors in the brain tissues. Administration of ethyl pyruvate ameliorated the AlCl3-induced neurotoxicity in neuron-glial mixed cell culture as well as histopathological, neurochemical, and behavioral consequences of chronic administration of AlCl3 in the rat. Ethyl pyruvate showed a docking score of 4.048. Thus, ethyl pyruvate is effective against in vitro and in vivo models of AlCl3-induced AD.
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Rossmann C, Nusshold C, Paar M, Ledinski G, Tafeit E, Koestenberger M, Bernhart EM, Sattler W, Cvirn G, Hallström S. Ethyl pyruvate inhibits oxidation of LDL in vitro and attenuates oxLDL toxicity in EA.hy926 cells. PLoS One 2018; 13:e0191477. [PMID: 29370236 PMCID: PMC5784938 DOI: 10.1371/journal.pone.0191477] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 01/06/2018] [Indexed: 12/29/2022] Open
Abstract
Background Ethyl pyruvate (EP) exerts anti-inflammatory and anti-oxidative properties. The aim of our study was to investigate whether EP is capable of inhibiting the oxidation of LDL, a crucial step in atherogenesis. Additionally, we examined whether EP attenuates the cytotoxic effects of highly oxidized LDL in the human vascular endothelial cell line EA.hy926. Methods Native LDL (nLDL) was oxidized using Cu2+ ions in the presence of increasing amounts of EP. The degree of LDL oxidation was quantified by measuring lipid hydroperoxide (LPO) and malondialdehyde (MDA) concentrations, relative electrophoretic mobilities (REMs), and oxidation-specific immune epitopes. The cytotoxicity of these oxLDLs on EA.hy926 cells was assessed by measuring cell viability and superoxide levels. Furthermore, the cytotoxicity of highly oxidized LDL on EA.hy926 cells under increasing concentrations of EP in the media was assessed including measurements of high energy phosphates (ATP). Results Oxidation of nLDL using Cu2+ ions was remarkably inhibited by EP in a concentration-dependent manner, reflected by decreased levels of LPO, MDA, REM, oxidation-specific epitopes, and diminished cytotoxicity of the obtained oxLDLs in EA.hy926 cells. Furthermore, the cytotoxicity of highly oxidized LDL on EA.hy926 cells was remarkably attenuated by EP added to the media in a concentration-dependent manner reflected by a decrease in superoxide and an increase in viability and ATP levels. Conclusions EP has the potential for an anti-atherosclerotic drug by attenuating both, the oxidation of LDL and the cytotoxic effect of (already formed) oxLDL in EA.hy926 cells. Chronic administration of EP might be beneficial to impede the development of atherosclerotic lesions.
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Affiliation(s)
- Christine Rossmann
- Institute of Physiological Chemistry, Medical University of Graz, Graz, Austria
| | - Christoph Nusshold
- Institute of Physiological Chemistry, Medical University of Graz, Graz, Austria
| | - Margret Paar
- Institute of Physiological Chemistry, Medical University of Graz, Graz, Austria
| | - Gerhard Ledinski
- Institute of Physiological Chemistry, Medical University of Graz, Graz, Austria
| | - Erwin Tafeit
- Institute of Physiological Chemistry, Medical University of Graz, Graz, Austria
| | | | - Eva Maria Bernhart
- Institute of Molecular Biology and Biochemistry, Medical University of Graz, Graz, Austria
| | - Wolfgang Sattler
- Institute of Molecular Biology and Biochemistry, Medical University of Graz, Graz, Austria
| | - Gerhard Cvirn
- Institute of Physiological Chemistry, Medical University of Graz, Graz, Austria
- * E-mail:
| | - Seth Hallström
- Institute of Physiological Chemistry, Medical University of Graz, Graz, Austria
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Jin K, Wu H, Lv T, Dai J, Zhang X, Jin Y. Ethyl pyruvate attenuates delayed experimental cerebral vasospasm following subarachnoid haemorrhage in rats: possible role of JNK pathway. RSC Adv 2018; 8:7726-7734. [PMID: 35539121 PMCID: PMC9078488 DOI: 10.1039/c7ra10801j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 02/12/2018] [Indexed: 12/21/2022] Open
Abstract
The pathophysiology of delayed cerebral vasospasm (CVS) after subarachnoid haemorrhage (SAH) is multifaceted and involves endothelial apoptosis and inflammation. Ethyl pyruvate (EP) could attenuate early brain injury following SAH via anti-inflammation and inhibition of the c-Jun N-terminal kinase (JNK) signalling pathway. However, the role of EP in the delayed CVS has yet to be determined. In this study, we examined the effect of EP on endothelial apoptosis and inflammation and explore possible signalling pathways. We found that EP could significantly attenuate the delayed CVS. Possible mechanisms include a decrease in the endothelial cell apoptosis of the basilar artery and alleviation of endothelial inflammation. The JNK signalling pathway may play an important role in the neuroprotective effects of EP on delayed CVS. The results suggest that EP may be a possible therapy for delayed CVS, and the JNK signalling pathway should be targeted for therapeutic purposes in the future. The pathophysiology of delayed cerebral vasospasm (CVS) after subarachnoid haemorrhage (SAH) is multifaceted and involves endothelial apoptosis and inflammation.![]()
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Affiliation(s)
- Ke Jin
- Department of Neurosurgery
- Renji Hospital
- Shanghai Jiaotong University
- School of Medicine
- Shanghai 200127
| | - Hui Wu
- Department of Neurosurgery
- Renji Hospital
- Shanghai Jiaotong University
- School of Medicine
- Shanghai 200127
| | - Tao Lv
- Department of Neurosurgery
- Renji Hospital
- Shanghai Jiaotong University
- School of Medicine
- Shanghai 200127
| | - Jiong Dai
- Department of Neurosurgery
- Renji Hospital
- Shanghai Jiaotong University
- School of Medicine
- Shanghai 200127
| | - Xiaohua Zhang
- Department of Neurosurgery
- Renji Hospital
- Shanghai Jiaotong University
- School of Medicine
- Shanghai 200127
| | - Yichao Jin
- Department of Neurosurgery
- Renji Hospital
- Shanghai Jiaotong University
- School of Medicine
- Shanghai 200127
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Hollenbach M. The Role of Glyoxalase-I (Glo-I), Advanced Glycation Endproducts (AGEs), and Their Receptor (RAGE) in Chronic Liver Disease and Hepatocellular Carcinoma (HCC). Int J Mol Sci 2017; 18:ijms18112466. [PMID: 29156655 PMCID: PMC5713432 DOI: 10.3390/ijms18112466] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 11/16/2017] [Accepted: 11/17/2017] [Indexed: 12/12/2022] Open
Abstract
Glyoxalase-I (Glo-I) and glyoxalase-II (Glo-II) comprise the glyoxalase system and are responsible for the detoxification of methylglyoxal (MGO). MGO is formed non-enzymatically as a by-product, mainly in glycolysis, and leads to the formation of advanced glycation endproducts (AGEs). AGEs bind to their receptor, RAGE, and activate intracellular transcription factors, resulting in the production of pro-inflammatory cytokines, oxidative stress, and inflammation. This review will focus on the implication of the Glo-I/AGE/RAGE system in liver injury and hepatocellular carcinoma (HCC). AGEs and RAGE are upregulated in liver fibrosis, and the silencing of RAGE reduced collagen deposition and the tumor growth of HCC. Nevertheless, data relating to Glo-I in fibrosis and cirrhosis are preliminary. Glo-I expression was found to be reduced in early and advanced cirrhosis with a subsequent increase of MGO-levels. On the other hand, pharmacological modulation of Glo-I resulted in the reduced activation of hepatic stellate cells and therefore reduced fibrosis in the CCl₄-model of cirrhosis. Thus, current research highlighted the Glo-I/AGE/RAGE system as an interesting therapeutic target in chronic liver diseases. These findings need further elucidation in preclinical and clinical studies.
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Affiliation(s)
- Marcus Hollenbach
- Department of Medicine, Neurology and Dermatology, Division of Gastroenterology and Rheumatology, University of Leipzig, Liebigstrasse 20, D-04103 Leipzig, Germany.
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7
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Pieroh P, Wagner DC, Ghadban C, Birkenmeier G, Dehghani F. Ethyl pyruvate does not require microglia for mediating neuroprotection after excitotoxic injury. CNS Neurosci Ther 2017; 23:798-807. [PMID: 28836378 DOI: 10.1111/cns.12725] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 07/24/2017] [Accepted: 07/25/2017] [Indexed: 01/11/2023] Open
Abstract
AIMS Ethyl pyruvate (EP) mediates protective effects after neuronal injury. Besides a direct conservation of damaged neurons, the modulation of indigenous glial cells has been suggested as one important mechanism for EP-related neuroprotection. However, the specific contribution of glial cells is still unknown. METHODS Organotypic hippocampal slice cultures (OHSC) were excitotoxically lesioned by 50 μmol/L N-methyl-D-aspartate (NMDA, for 4 hours) or left untreated. In an additional OHSC subset, microglia was depleted using the bisphosphonate clodronate (100 μg/mL) before lesion. After removal of NMDA, EP containing culture medium (0.84 μmol/L, 8.4 μmol/L, 42 μmol/L, 84 μmol/L, 168 μmol/L) was added and incubated for 72 hours. OHSC were stained with propidium iodide to visualize degenerating neurons and isolectin IB4 -FITC to identify microglia. Effects of EP at concentrations of 0.84, 8.4, and 84 μmol/L (0-48 hours) were analyzed in the astrocytic scratch wound assay. RESULTS EP significantly reduced neurodegeneration following induced excitotoxicity except for 168 μmol/L. For 84 μmol/L, a reduction in the microglia cells was observed. Microglia depletion did not affect neuronal survival after EP treatment. EP decelerated astrocytic wound closure at 48 hours after injury. CONCLUSION EP-mediated neuroprotection seems to be mediated by astrocytes and/or neurons.
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Affiliation(s)
- Philipp Pieroh
- Department of Anatomy and Cell Biology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany.,Department of Orthopedics, Trauma and Plastic Surgery, University of Leipzig, Leipzig, Germany
| | | | - Chalid Ghadban
- Department of Anatomy and Cell Biology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Gerd Birkenmeier
- Institute of Biochemistry, University of Leipzig, Leipzig, Germany
| | - Faramarz Dehghani
- Department of Anatomy and Cell Biology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
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Li W, Yang X, Peng M, Li C, Mu G, Chen F. Inhibitory effects of ethyl pyruvate on platelet aggregation and phosphatidylserine exposure. Biochem Biophys Res Commun 2017; 487:560-566. [PMID: 28427942 DOI: 10.1016/j.bbrc.2017.04.087] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 04/13/2017] [Indexed: 12/12/2022]
Abstract
Ethyl pyruvate (EP) is a stable lipophilic pyruvate derivative. Studies demonstrated that EP shows potent anti-oxidation, anti-inflammatory and anti-coagulant effects. Inflammation and coagulation are closely interacted with platelet activation. However, it is unclear whether EP has anti-platelet effects. Therefore, we investigated the anti-platelet effect of EP in this study in vitro. We found that EP inhibited agonists induced platelets aggregation, ATP release and adhesion to collagen. Flow cytometric analysis revealed that EP inhibited agonist induced platelets PAC-1 binding, as well as P-selectin and CD40L expression. The underlying mechanism of action may involve the inhibition of platelet PI3K/Akt and Protein Kinase C (PKC) signaling pathways. Additionally, EP dose dependently inhibited platelet PS exposure induced by high concentration thrombin. Lactate dehydrogenase (LDH) activity assay and mice platelet count implied that EP may have no toxic effect on platelets. Therefore, we are the first to report that EP has potent anti-platelet activity and attenuates platelet PS exposure in vitro, suggesting that the inhibitory effects of EP on platelets may also play important roles in improvement of inflammation and coagulation disorder in related animal models.
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Affiliation(s)
- Wenjin Li
- Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Xinyu Yang
- Department of Hematology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Minyuan Peng
- Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Can Li
- Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Guangfu Mu
- Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Fangping Chen
- Department of Hematology, Xiangya Hospital, Central South University, Changsha, Hunan, PR China; Department of Hematology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, PR China.
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Lv T, Miao YF, Jin YC, Yang SF, Wu H, Dai J, Zhang XH. Ethyl Pyruvate Attenuates Early Brain Injury Following Subarachnoid Hemorrhage in the Endovascular Perforation Rabbit Model Possibly Via Anti-inflammation and Inhibition of JNK Signaling Pathway. Neurochem Res 2017; 42:1044-1056. [PMID: 28236213 DOI: 10.1007/s11064-016-2138-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Revised: 11/30/2016] [Accepted: 12/08/2016] [Indexed: 12/16/2022]
Abstract
Early brain injury (EBI) following subarachnoid hemorrhage (SAH) is the main cause to poor outcomes of SAH patients, and early inflammation plays an important role in the acute pathophysiological events. It has been demonstrated that ethyl pyruvate (EP) has anti-inflammatory and neuroprotective effects in various critical diseases, however, the role of EP on EBI following SAH remains to be elucidated. Our study aimed to evaluate the effects of EP on EBI following SAH in the endovascular perforation rabbit model. All rabbits were randomly divided into three groups: sham, SAH + Vehicle (equal volume) and SAH + EP (30 mg/kg/day). MRI was performed to estimate the reliability of the EBI at 24 and 72 h after SAH. Neurological scores were recorded to evaluate the neurological deficit, ELISA kit was used to measure the level of tumor necrosis factor-α (TNF-α), and western blot was used to detect the expression of TNF-α, tJNK, pJNK, bax and bcl-2 at 24 and 72 h after SAH. Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) and Fluoro-jade B (FJB) staining were used to detect neuronal apoptosis and neurodegeneration respectively, meanwhile hematoxylin and eosin (H&E) staining was used to assess the degree of vasospasm. Our results demonstrated that EP alleviated brain tissue injury (characterized by diffusion weighted imaging and T2 sequence in MRI scan), and significantly improved neurological scores at 72 h after SAH. EP decreased the level of TNF-α and downregulated pJNK/tJNK and bax/bcl-2 in cerebral cortex and hippocampus effectively both at 24 and 72 h after SAH. Furthermore, EP reduced TUNEL and FJB positive cells significantly. In conclusion, the present study supported that EP afforded neuroprotective effects possibly via reducing TNF-α expression and inhibition of the JNK signaling pathway. Therefore, EP may be a potent therapeutic agent to attenuate EBI following SAH.
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Affiliation(s)
- Tao Lv
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, No. 160 Pujian Road, Shanghai, 200127, China
| | - Yi-Feng Miao
- Department of Neurosurgery, Ren Ji Hospital South Campus, School of Medicine, Shanghai Jiao Tong University, No. 2000 Jiangyue Road, Shanghai, 201112, China
| | - Yi-Chao Jin
- Department of Neurosurgery, Ren Ji Hospital South Campus, School of Medicine, Shanghai Jiao Tong University, No. 2000 Jiangyue Road, Shanghai, 201112, China
| | - Shao-Feng Yang
- Department of Neurosurgery, Ren Ji Hospital South Campus, School of Medicine, Shanghai Jiao Tong University, No. 2000 Jiangyue Road, Shanghai, 201112, China
| | - Hui Wu
- Department of Neurosurgery, Ren Ji Hospital South Campus, School of Medicine, Shanghai Jiao Tong University, No. 2000 Jiangyue Road, Shanghai, 201112, China
| | - Jiong Dai
- Department of Neurosurgery, Ren Ji Hospital South Campus, School of Medicine, Shanghai Jiao Tong University, No. 2000 Jiangyue Road, Shanghai, 201112, China.
| | - Xiao-Hua Zhang
- Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, No. 160 Pujian Road, Shanghai, 200127, China.
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10
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Jaworska J, Ziemka-Nalecz M, Sypecka J, Zalewska T. The potential neuroprotective role of a histone deacetylase inhibitor, sodium butyrate, after neonatal hypoxia-ischemia. J Neuroinflammation 2017; 14:34. [PMID: 28187734 PMCID: PMC5303300 DOI: 10.1186/s12974-017-0807-8] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 02/01/2017] [Indexed: 02/07/2023] Open
Abstract
Background Histone deacetylase inhibitor (HDACi), sodium butyrate (SB), has been shown to be neuroprotective in adult brain injury models. Potential explanation for the inhibitor action involves among others reduced inflammation. We therefore anticipated that SB will provide a suitable option for brain injury in immature animals. The aim of our study was to test the hypothesis that one of the mechanisms of protection afforded by SB after neonatal hypoxia-ischemia is associated with anti-inflammatory action. We examined the effect of SB on the production of inflammatory factors including analysis of the microglial and astrocytic cell response. We also examined the effect of SB on molecular mediators that are crucial for inducing cerebral damage after ischemia (transcription factors, HSP70, as well as pro- and anti-apoptotic proteins). Methods Seven-day-old rat pups were subjected to unilateral carotid artery ligation followed by 60 min of hypoxia (7.6% O2). SB (300 mg/kg) was administered in a 5-day regime with the first injection given immediately after hypoxic exposure. The damage of the ipsilateral hemisphere was evaluated by hematoxylin-eosin staining (HE) 6 days after the insult. Samples were collected at 24 and 48 h and 6 days. Effects of SB on hypoxia-ischemia (HI)-induced inflammation (cytokines and chemokine) were assessed by Luminex assay and immunohistochemistry. Expression of molecular mediators (NFκB, p53, HSP70, COX-2, pro- and anti-apoptotic factors Bax, Bcl-2, caspase-3) were assayed by Western blot analysis. Results SB treatment-reduced brain damage, as assessed by HE staining, suppressed the production of inflammatory markers—IL-1β, chemokine CXCL10, and blocked ischemia-elicited upregulation of COX-2 in the damaged ipsilateral hemisphere. Furthermore, administration of SB promoted the conversion of microglia phenotype from inflammatory M1 to anti-inflammatory M2. None of the investigated molecular mediators that are known to be affected by HDACis in adults were modified after SB administration. Conclusions Administration of SB is neuroprotective in neonatal hypoxia-ischemia injury. This neuroprotective activity prevented the delayed rise in chemokine CXCL10, IL-1β, and COX-2 in the ipsilateral hemisphere. SB appears to exert a beneficial effect via suppression of HI-induced cerebral inflammation.
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Affiliation(s)
- Joanna Jaworska
- NeuroRepair Department, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 A. Pawinskiego Street, 02-106, Warsaw, Poland
| | - Malgorzata Ziemka-Nalecz
- NeuroRepair Department, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 A. Pawinskiego Street, 02-106, Warsaw, Poland
| | - Joanna Sypecka
- NeuroRepair Department, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 A. Pawinskiego Street, 02-106, Warsaw, Poland
| | - Teresa Zalewska
- NeuroRepair Department, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 A. Pawinskiego Street, 02-106, Warsaw, Poland.
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11
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Kim SW, Lee HK, Kim ID, Lee H, Luo L, Park JY, Yoon SH, Lee JK. Robust neuroprotective effects of 2-((2-oxopropanoyl)oxy)-4-(trifluoromethyl)benzoic acid (OPTBA), a HTB/pyruvate ester, in the postischemic rat brain. Sci Rep 2016; 6:31843. [PMID: 27545301 PMCID: PMC4992820 DOI: 10.1038/srep31843] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 07/27/2016] [Indexed: 12/25/2022] Open
Abstract
Postischemic brain damage in stroke is proceded with complicated pathological events, and so multimodal drug treatments may offer better therapeutic means for improving clinical outcomes. Here, we report robust neuroprotective effects of a novel compound, 2-((2-oxopropanoyl)oxy)-4-(trifluoromethyl)benzoic acid (OPTBA), a 2-hydroxy-4-trifluoromethyl benzoic acid (HTB, a metabolite of triflusal)-pyruvate ester. Intravenous administration of OPTBA (5 mg/kg) 3 or 6 h after middle cerebral artery occlusion (MCAO) in Sprague-Dawley rats reduced infarct volumes to 38.5 ± 11.4% and 46.5 ± 15.3%, respectively, of that of MCAO controls, and ameliorated motor impairment and neurological deficits. Importantly, neuroprotective effects of OPTBA were far greater than those afforded by combined treatment of HTB and pyruvate. Furthermore, OPTBA suppressed microglial activation and proinflammatory cytokine inductions more effectively than HTB/pyruvate co-treatment in the postischemic brain and LPS-treated cortical slice cultures and also attenuated NMDA-induced neuronal death in hippocampal slice cultures. LC-MS analysis demonstrated that OPTBA was hydrolyzed to HTB and pyruvate with a t1/2 of 38.6 min in blood and 7.2 and 2.4 h in cortex and striatum, respectively, and HTB was maintained for more than 24 h both in blood and brain tissue. Together these results indicate OPTBA acts directly and via its hydrolysis products, thus acting as a multimodal neuroprotectant in the postischemic brain.
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Affiliation(s)
- Seung-Woo Kim
- Department of Biomedical Sciences, Inha University School of Medicine, Inchon, Republic of Korea.,Medical Research Center, Inha University School of Medicine, Inchon, Republic of Korea
| | - Hye-Kyung Lee
- Medical Research Center, Inha University School of Medicine, Inchon, Republic of Korea.,Department of Anatomy, Inha University School of Medicine, Inchon, Republic of Korea
| | - Il-Doo Kim
- Medical Research Center, Inha University School of Medicine, Inchon, Republic of Korea.,Department of Anatomy, Inha University School of Medicine, Inchon, Republic of Korea
| | - Hahnbie Lee
- Medical Research Center, Inha University School of Medicine, Inchon, Republic of Korea.,Department of Anatomy, Inha University School of Medicine, Inchon, Republic of Korea
| | - Lidan Luo
- Medical Research Center, Inha University School of Medicine, Inchon, Republic of Korea.,Department of Anatomy, Inha University School of Medicine, Inchon, Republic of Korea
| | - Ju-Young Park
- Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Sung-Hwa Yoon
- Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Ja-Kyeong Lee
- Medical Research Center, Inha University School of Medicine, Inchon, Republic of Korea.,Department of Anatomy, Inha University School of Medicine, Inchon, Republic of Korea
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Kim SW, Lee HK, Kim HJ, Yoon SH, Lee JK. Neuroprotective effect of ethyl pyruvate against Zn(2+) toxicity via NAD replenishment and direct Zn(2+) chelation. Neuropharmacology 2016; 105:411-419. [PMID: 26850126 DOI: 10.1016/j.neuropharm.2016.02.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 12/31/2015] [Accepted: 02/01/2016] [Indexed: 12/28/2022]
Abstract
Ethyl pyruvate (EP) is a simple aliphatic ester of pyruvic acid and has been shown to have robust protective effect in various pathological conditions. A variety of mechanisms have been reported to underlie the protective effects of EP, which include anti-inflammatory, anti-oxidative, and anti-apoptotic functions. Recently, we reported that EP suppressed high mobility group box 1 (HMGB1) release from primary microglial cells via direct Ca(2+) chelation. In the present study, we investigated whether and how EP chelates Zn(2+) in neurons when it is present at toxic levels. In cortical neurons treated with 40 μM of Zn(2+) for 24 h, both EP and pyruvate significantly suppressed neuronal cell death, although the potency of pyruvate was greater than that of EP, and that NAD replenishment contributed to the neuroprotective effects of both pyruvate and EP. However, when cortical neurons were exposed to acute treatment of Zn(2+) (400 μM, 15 min), EP, but not pyruvate, significantly suppressed neuronal death, despite the fact that NAD replenishment by EP was weaker than that by pyruvate. Spectrophotometric studies revealed that EP directly chelates Zn(2+), and this was confirmed in physiological contexts, such as, NMDA-treated primary cortical cultures and OGD-subjected hippocampal slice cultures, in which EP suppressed intracellular Zn(2+) elevation and neuronal cell death. In addition, EP markedly reduced the expressions of PARP-1 and of the NADPH oxidase subunit in Zn(2+)-treated primary cortical neurons, well known Zn(2+)-induced downstream processes. Together, these results show EP suppresses Zn(2+) induced neurotoxicity via dual functions, chelating Zn(2+) and promoting NAD replenishment.
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Affiliation(s)
- Seung-Woo Kim
- Department of Anatomy, Republic of Korea; Medical Research Center, Inha University School of Medicine Incheon, Republic of Korea
| | - Hye-Kyung Lee
- Department of Anatomy, Republic of Korea; Medical Research Center, Inha University School of Medicine Incheon, Republic of Korea
| | - Hyun-Ji Kim
- Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Sung-Hwa Yoon
- Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Ja-Kyeong Lee
- Department of Anatomy, Republic of Korea; Medical Research Center, Inha University School of Medicine Incheon, Republic of Korea.
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13
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Shi H, Wang HL, Pu HJ, Shi YJ, Zhang J, Zhang WT, Wang GH, Hu XM, Leak RK, Chen J, Gao YQ. Ethyl pyruvate protects against blood-brain barrier damage and improves long-term neurological outcomes in a rat model of traumatic brain injury. CNS Neurosci Ther 2014; 21:374-84. [PMID: 25533312 DOI: 10.1111/cns.12366] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 11/02/2014] [Accepted: 11/02/2014] [Indexed: 01/02/2023] Open
Abstract
AIMS Many traumatic brain injury (TBI) survivors sustain neurological disability and cognitive impairments due to the lack of defined therapies to reduce TBI-induced long-term brain damage. Ethyl pyruvate (EP) has shown neuroprotection in several models of acute brain injury. The present study therefore investigated the potential beneficial effect of EP on long-term outcomes after TBI and the underlying mechanisms. METHODS Male adult rats were subjected to unilateral controlled cortical impact injury. EP was injected intraperitoneally 15 min after TBI and again at 12, 24, 36, 48, and 60 h after TBI. Neurological deficits, blood-brain barrier (BBB) integrity, and neuroinflammation were assessed. RESULTS Ethyl pyruvate improved sensorimotor and cognitive functions and ameliorated brain tissue damage up to 28 day post-TBI. BBB breach and brain edema were attenuated by EP at 48 h after TBI. EP suppressed matrix metalloproteinase (MMP)-9 production from peripheral neutrophils and reduced the number of MMP-9-overproducing neutrophils in the spleen, and therefore mitigated MMP-9-mediated BBB breakdown. Moreover, EP exerted potent antiinflammatory effects in cultured microglia and inhibited the elevation of inflammatory mediators in the brain after TBI. CONCLUSION Ethyl pyruvate confers long-term neuroprotection against TBI, possibly through breaking the vicious cycle among MMP-9-mediated BBB disruption, neuroinflammation, and long-lasting brain damage.
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Affiliation(s)
- Hong Shi
- Department of Anesthesiology of Huashan Hospital, State Key Laboratory of Medical Neurobiology and Institute of Brain Sciences, Fudan University, Shanghai, China; Department of Anesthesiology of Shanghai Pulmonary Hospital, Tongji University, Shanghai, China
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Ethyl pyruvate ameliorates 3-nitropropionic acid-induced striatal toxicity through anti-neuronal cell death and anti-inflammatory mechanisms. Brain Behav Immun 2014; 38:151-65. [PMID: 24576481 DOI: 10.1016/j.bbi.2014.01.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 01/15/2014] [Accepted: 01/26/2014] [Indexed: 01/17/2023] Open
Abstract
The potential neuroprotective value of ethyl pyruvate (EP) for the treatment of the striatal toxicity is largely unknown. We investigated whether EP promotes the survival of striatal neurons in a 3-nitropropionic acid (3-NP)-induced mouse model of Huntington's disease (HD). EP (5, 10, 20, and 40mg/kg/day, i.p.) was daily injected from 30min before 3-NP intoxication (pretreatment) and from onset/progression/peak point of neurological impairment by 3-NP intoxication. EP produced a neuroprotective effect in dose- and time-dependant manners. EP pretreatment of 40mg/kg/day produced the best neuroprotective effect among other conditions. Pretreatment of EP significantly attenuated neurological impairment and lethality and prevented formation of lesion area and neuronal loss in the striatum after 3-NP intoxication. This neuroprotection afforded by EP was associated with the suppression of succinate dehydrogenase activity, apoptosis, and microglial activation. The suppressive effect of EP corresponded to the down-regulation of mitogen-activated protein kinases (MAPKs) and nuclear factor-kappa B (NF-κB) signal pathways, and mRNA expression of inflammatory mediators including tumor necrosis factor-alpha, interleukin (IL)-1β, IL-6, inducible nitric oxide synthase, and cyclooxygenase-2 in the striatum after 3-NP intoxication. Interestingly, the intrathecal introduction of inhibitors MAPKs and NF-κB into control mice decreased the lethality after 3-NP intoxication. Our findings indicate that EP may effectively alleviate 3-NP-induced striatal toxicity by inhibition of the MAPKs and NF-κB pathways in the striatum, and that EP has a wide therapeutic window, suggesting that EP may have therapeutic value in the treatment of aspects of HD's disease related to inflammation.
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15
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Shin JH, Lee HK, Lee HB, Jin Y, Lee JK. Ethyl pyruvate inhibits HMGB1 phosphorylation and secretion in activated microglia and in the postischemic brain. Neurosci Lett 2014; 558:159-63. [DOI: 10.1016/j.neulet.2013.11.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 10/26/2013] [Accepted: 11/07/2013] [Indexed: 11/30/2022]
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Kim SW, Lee HK, Shin JH, Lee JK. Up-down regulation of HO-1 and iNOS gene expressions by ethyl pyruvate via recruiting p300 to Nrf2 and depriving It from p65. Free Radic Biol Med 2013; 65:468-476. [PMID: 23891677 DOI: 10.1016/j.freeradbiomed.2013.07.028] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 06/27/2013] [Accepted: 07/19/2013] [Indexed: 11/22/2022]
Abstract
Ethyl pyruvate (EP), a simple ester of pyruvic acid, has been shown to exert robust neuroprotection in various neuropathological conditions, such as, cerebral ischemia and KA-induced seizure animal models. The neuroprotective effect of EP is attributable to the anti-inflammatory, anti-oxidative, and anti-apoptotic effects. In the present study, we investigated convergence of anti-inflammatory and anti-oxidative functions of EP and present a novel molecular mechanism underlying anti-inflammatory effects of EP, which is conveyed by p300, a transcriptional co-activator for both Nuclear factor E2-related factor 2 (Nrf2) and p65. In BV2 cells, a microglia cell line, EP induced translocation of Nrf2 from the cytosol to the nucleus and enhanced the expression of hemeoxygenase 1 (HO-1) in a dose-dependent manner and 1h incubation with 10mM EP increased HO-1 to 4.9-fold. Nrf2 was found to translocate from the cytosol to the nucleus beginning 30 min after EP-treatment and binds to the antioxidant response element (ARE) located on HO-1 promoter. Interestingly, LPS-induced inducible NO synthase (iNOS) induction was substantially suppressed in EP-pre-treated BV2 cells and it was reverted by Nrf2 knockdown. We found that EP-induced Nrf2 accumulation in the nucleus recruits p300, a transcriptional co-activator of both Nrf2 and p65, inhibiting p65-p300 interaction. Competition between Nrf2 and p65 for p300 binding was confirmed by glutathione S-transferase (GST) pull down assay and reporter gene analysis. These results demonstrate that EP induced nuclear translocation of Nrf2 which binds to ARE along with p300 and hampers iNOS expression via depleting p300 from p65. This is a novel anti-inflammatory mechanism conveyed by EP, which enhances protective effect by converging anti-inflammatory and anti-oxidative effects and might be applicable to various Nrf2-activating agents, such as phytochemicals.
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Affiliation(s)
- Seung-Woo Kim
- Department of Anatomy, Center for Advanced Medical Education (BK21 project), Inha University School of Medicine, Incheon, Korea
| | - Hye-Kyung Lee
- Department of Anatomy, Center for Advanced Medical Education (BK21 project), Inha University School of Medicine, Incheon, Korea
| | - Joo-Hyun Shin
- Department of Anatomy, Center for Advanced Medical Education (BK21 project), Inha University School of Medicine, Incheon, Korea
| | - Ja-Kyeong Lee
- Department of Anatomy, Center for Advanced Medical Education (BK21 project), Inha University School of Medicine, Incheon, Korea.
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17
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Yan BC, Park JH, Shin BN, Ahn JH, Kim IH, Lee JC, Yoo KY, Hwang IK, Choi JH, Park JH, Lee YL, Suh HW, Jun JG, Kwon YG, Kim YM, Kwon SH, Her S, Kim JS, Hyun BH, Kim CK, Cho JH, Lee CH, Won MH. Neuroprotective effect of a new synthetic aspirin-decursinol adduct in experimental animal models of ischemic stroke. PLoS One 2013; 8:e74886. [PMID: 24073226 PMCID: PMC3779249 DOI: 10.1371/journal.pone.0074886] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Accepted: 08/07/2013] [Indexed: 02/04/2023] Open
Abstract
Stroke is the second leading cause of death. Experimental animal models of cerebral ischemia are widely used for researching mechanisms of ischemic damage and developing new drugs for the prevention and treatment of stroke. The present study aimed to comparatively investigate neuroprotective effects of aspirin (ASA), decursinol (DA) and new synthetic aspirin-decursinol adduct (ASA-DA) against transient focal and global cerebral ischemic damage. We found that treatment with 20 mg/kg, not 10 mg/kg, ASA-DA protected against ischemia-induced neuronal death after transient focal and global ischemic damage, and its neuroprotective effect was much better than that of ASA or DA alone. In addition, 20 mg/kg ASA-DA treatment reduced the ischemia-induced gliosis and maintained antioxidants levels in the corresponding injury regions. In brief, ASA-DA, a new synthetic drug, dramatically protected neurons from ischemic damage, and neuroprotective effects of ASA-DA may be closely related to the attenuation of ischemia-induced gliosis and maintenance of antioxidants.
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Affiliation(s)
- Bing Chun Yan
- Institute of Integrative traditional & western Medicine,Medical College, Yangzhou University, Yangzhou, China
| | - Joon Ha Park
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Bich Na Shin
- Department of Physiology, College of Medicine and Institute of Neurodegeneration and Neuroregeneration, Hallym University, Chuncheon, South Korea
| | - Ji Hyeon Ahn
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - In Hye Kim
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Jae-Chul Lee
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Ki-Yeon Yoo
- Department of Oral Anatomy, College of Dentistry, Gangneung-Wonju National University, Gangneung, South Korea
| | - In Koo Hwang
- Department of Anatomy and Cell Biology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
| | - Jung Hoon Choi
- Department of Anatomy, College of Veterinary Medicine, Kangwon National University, Chuncheon, South Korea
| | - Jeong Ho Park
- Division of Applied Chemistry and Biotechnology, Hanbat National University, Daejeon, South Korea
| | - Yun Lyul Lee
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Hong-Won Suh
- Department of Pharmacology and Institute of Natural Medicine, College of Medicine Hallym University, Chuncheon, South Korea
| | - Jong-Gab Jun
- Department of Chemistry and Institute of Applied Chemistry, Hallym University, Chuncheon, South Korea
| | - Young-Guen Kwon
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea
| | - Young-Myeong Kim
- Vascular System Research Center and Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Seung-Hae Kwon
- Division of Analytical Bio-imaging, Chuncheon Center, Korea Basic Science Institute, Chuncheon, Kangwon, South Korea
| | - Song Her
- Division of Analytical Bio-imaging, Chuncheon Center, Korea Basic Science Institute, Chuncheon, Kangwon, South Korea
| | - Jin Su Kim
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea
| | - Byung-Hwa Hyun
- Laboratory Animal Center, OSONG Medical Innovation Foundation, Osong, South Korea
| | - Chul-Kyu Kim
- Laboratory Animal Center, OSONG Medical Innovation Foundation, Osong, South Korea
| | - Jun Hwi Cho
- Department of Emergency Medicine and Institute of Medical Sciences, Kangwon National University Hospital, School of Medicine, Kangwon National University, Chuncheon, South Korea
| | - Choong Hyun Lee
- Department of Anatomy and Physiology, College of Pharmacy, Dankook University, Cheonan, South Korea
- * E-mail: (MHW); (CHL)
| | - Moo-Ho Won
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, South Korea
- * E-mail: (MHW); (CHL)
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Lee HK, Kim SW, Jin Y, Kim ID, Park JY, Yoon SH, Lee JK. Anti-inflammatory effects of OBA-09, a salicylic acid/pyruvate ester, in the postischemic brain. Brain Res 2013; 1528:68-79. [PMID: 23850644 DOI: 10.1016/j.brainres.2013.06.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 06/20/2013] [Accepted: 06/21/2013] [Indexed: 01/04/2023]
Abstract
Cerebral ischemia leads to brain injury via a complex series of pathophysiological events, and therefore, multi-drug treatments or multi-targeting drug treatments provide attractive options with respect to limiting brain damage. Previously, we reported that a novel multi-functional compound oxopropanoyloxy benzoic acid (OBA-09, a simple ester of pyruvate and salicylic acid) affords robust neuroprotective effects in the postischemic rat brain. OBA-09 exhibited anti-oxidative effects that appeared to be executed by OBA-09 and by the salicylic acid afforded by hydrolysis. Here, we report the anti-inflammatory effects of OBA-09. Microglial activation observed at 2 days post-middle cerebral artery occlusion (MCAO, 90 min) and at 1 day after a LPS injection (0.5 mg/kg, intravenously) in the brains of Sprague-Dawley rats were markedly suppressed by the administration of OBA-09 (10 mg/kg). Inductions of proinflammatory markers (TNF-α, IL-1β, iNOS, and COX-2) were also suppressed by OBA-09 in both the LPS and MCAO models. Moreover, the anti-inflammatory effect of OBA-09 was accompanied by the suppression of infarct formation in the postischemic brain, but appeared to be independent of neuroprotection in LPS-treated rats. The inductions of proinflammatory markers were also inhibited by OBA-09 in LPS-treated BV2 cells (a microglia cell line) and in LPS-treated-primary neutrophils, possibly due to the suppression of NF-κB activity. Interestingly, the anti-inflammatory effect of OBA-09 was greater than that of equivalent co-treatment with pyruvate and salicylic acid. Together these results indicate that OBA-09 is a potent multi-modal neuroprotectant in the postischemic brain, and that its anti-inflammatory effect contributes to its neuroprotective function.
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Affiliation(s)
- Hye-Kyung Lee
- Department of Anatomy and Inha Research Institute for Medical Sciences, Inha University School of Medicine, 7-241 Shinheung-dong, Jung-Gu, Inchon 400-712, Republic of Korea
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Puyal J, Ginet V, Clarke PGH. Multiple interacting cell death mechanisms in the mediation of excitotoxicity and ischemic brain damage: a challenge for neuroprotection. Prog Neurobiol 2013; 105:24-48. [PMID: 23567504 DOI: 10.1016/j.pneurobio.2013.03.002] [Citation(s) in RCA: 160] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 03/05/2013] [Accepted: 03/13/2013] [Indexed: 02/09/2023]
Abstract
There is currently no approved neuroprotective pharmacotherapy for acute conditions such as stroke and cerebral asphyxia. One of the reasons for this may be the multiplicity of cell death mechanisms, because inhibition of a particular mechanism leaves the brain vulnerable to alternative ones. It is therefore essential to understand the different cell death mechanisms and their interactions. We here review the multiple signaling pathways underlying each of the three main morphological types of cell death--apoptosis, autophagic cell death and necrosis--emphasizing their importance in the neuronal death that occurs during cerebral ischemia and hypoxia-ischemia, and we analyze the interactions between the different mechanisms. Finally, we discuss the implications of the multiplicity of cell death mechanisms for the design of neuroprotective strategies.
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Affiliation(s)
- Julien Puyal
- Département des Neurosciences Fondamentales, Université de Lausanne, Rue du Bugnon 9, 1005 Lausanne, Switzerland.
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Shin JH, Kim SW, Jin Y, Kim ID, Lee JK. Ethyl pyruvate-mediated Nrf2 activation and hemeoxygenase 1 induction in astrocytes confer protective effects via autocrine and paracrine mechanisms. Neurochem Int 2012; 61:89-99. [DOI: 10.1016/j.neuint.2012.04.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 03/22/2012] [Accepted: 04/05/2012] [Indexed: 12/30/2022]
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Lee MJ, Jang M, Jung HS, Kim SH, Cho IH. Ethyl pyruvate attenuates formalin-induced inflammatory nociception by inhibiting neuronal ERK phosphorylation. Mol Pain 2012; 8:40. [PMID: 22640699 PMCID: PMC3472237 DOI: 10.1186/1744-8069-8-40] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Accepted: 05/10/2012] [Indexed: 12/28/2022] Open
Abstract
Background Ethyl pyruvate (EP) possesses anti-inflammatory activity. However, the potential anti-nociceptive value of EP for the treatment of the inflammatory nociception is largely unknown. We investigated whether EP could have any anti-nociceptive effect on inflammatory pain, after systemic administration of EP (10, 50, and 100 mg/kg, i.p.), 1 hour before formalin (5%, 50 μl) injection into the plantar surface of the hind paws of rats. Results EP significantly decreased formalin-induced nociceptive behavior during phase II, the magnitude of paw edema, and the activation of c-Fos in L4-L5 spinal dorsal horn. EP also attenuated the phosphorylation of extracellular signal-regulated kinase (ERK) in the neurons of L4-L5 spinal dorsal horn after formalin injection. Interestingly, the i.t. administration of PD98059, an ERK upstream kinase (MEK) inhibitor, completely blocked the formalin-induced inflammatory nociceptive responses. Conclusions These results demonstrate that EP may effectively inhibit formalin-induced inflammatory nociception via the inhibition of neuronal ERK phosphorylation in the spinal dorsal horn, indicating its therapeutic potential in suppressing acute inflammatory pain.
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Affiliation(s)
- Min Jung Lee
- Department of Anatomy, College of Oriental Medicine, and Institute of Oriental Medicine, Kyung Hee University, Seoul, 130-701, Republic of Korea
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Park JY, Kim SW, Lee JK, Im WB, Jin BK, Yoon SH. Simplified Heterocyclic Analogues of Fluoxetine Inhibit Inducible Nitric Oxide Production in Lipopolysaccharide-Induced BV2 Cells. Biol Pharm Bull 2011; 34:538-44. [DOI: 10.1248/bpb.34.538] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Ju-Young Park
- Department of Molecular Science and Technology, Ajou University
| | | | | | - Weon Bin Im
- Department of Molecular Science and Technology, Ajou University
| | - Byung Kwan Jin
- Department of Biochemistry & Molecular Biology, Neurodegeneration Control Research Center, School of Medicine Kyung Hee University
| | - Sung-Hwa Yoon
- Department of Molecular Science and Technology, Ajou University
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Kiss P, Atlasz T, Szabadfi K, Horvath G, Griecs M, Farkas J, Matkovits A, Toth G, Lubics A, Tamas A, Gabriel R, Reglodi D. Comparison between PACAP- and enriched environment-induced retinal protection in MSG-treated newborn rats. Neurosci Lett 2010; 487:400-5. [PMID: 21050880 DOI: 10.1016/j.neulet.2010.10.065] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Revised: 10/25/2010] [Accepted: 10/27/2010] [Indexed: 10/18/2022]
Abstract
Pituitary adenylate cyclase activating polypeptide (PACAP) and its receptors occur throughout the nervous system, including the retina. PACAP exerts diverse actions in the eye: it influences ocular blood flow, contraction of the ciliary muscle, and has retinoprotective effects. This effect has been proven in different models of retinal degeneration. We have previously shown that PACAP protects against monosodium-glutamate (MSG)-induced damage in neonatal rats. The beneficial effects of enriched environment, another neuroprotective strategy, have long been known. Environmental enrichment has been shown to decrease different neuronal injuries. It also influences the development of the visual system. We have recently demonstrated that significant neuroprotection can be achieved in MSG-induced retinal degeneration in animals kept in an enriched environment. Combination of neuroprotective strategies often results in increased protection. Therefore, the aim of the present study was to compare the two neuroprotective strategies alone and in combination therapy. We found that both PACAP and environmental enrichment led to a similar degree of retinal protection, but the two treatments together did not lead to increased protection: their effects were not additive.
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Affiliation(s)
- Peter Kiss
- Department of Anatomy, University of Pecs, 7624 Pecs, Szigeti u 12, Hungary.
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Kim SW, Kim HJ, Shin JH, Kim ID, Lee JE, Han PL, Yoon SH, Lee JK. Robust protective effects of a novel multimodal neuroprotectant oxopropanoyloxy benzoic acid (a salicylic acid/pyruvate ester) in the postischemic brain. Mol Pharmacol 2010; 79:220-8. [PMID: 21036874 DOI: 10.1124/mol.110.067520] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Cerebral ischemia leads to brain injury via a complex series of pathophysiological events. Therefore, multidrug treatments or multitargeting drug treatments are attractive options in efficiently limiting brain damage. Here, we report a novel multifunctional compound oxopropanoyloxy benzoic acid (OBA-09), a simple ester of pyruvate and salicylic acid. This protective effect was manifested by recoveries from neurological and behavioral deficits. OBA-09 exhibited antioxidative effects in the postischemic brain, which was evidenced by remarkable reduction of lipid peroxidation and 4-hydroxy-2-nonenal staining in OBA-09-administered animals. Reactive oxygen species generation was markedly suppressed in primary cortical cultures under oxygen-glucose deprivation. More interestingly, OBA-09 was capable of scavenging hydroxyl radical in cell-free assays. High-performance liquid chromatography results demonstrated that OBA-09 was hydrolyzed to salicylic acid and pyruvate with t(1/2) = 43 min in serum and 4.2 h in brain parenchyma, indicating that antioxidative function of OBA-09 is executed by itself and also by salicylic acid after the hydrolysis. In addition to antioxidative function, OBA-09 exerts anti-excitotoxic and anti-Zn(2+)-toxic functions, which might be attributed to attenuation of ATP and nicotinamide adenine dinucleotide depletion and to the suppression of nuclear factor-κB activity induction. Together these results indicate that OBA-09 has a potent therapeutic potential as a multimodal neuroprotectant in the postischemic brain and these effects were conferred by OBA-09 itself and subsequently its hydrolyzed products.
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Affiliation(s)
- Seung-Woo Kim
- Department of Anatomy and Center for Advanced Medical Education (BK21 Project), Inha University School of Medicine, Inchon, Republic of Korea
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Berk M, Kapczinski F, Andreazza AC, Dean OM, Giorlando F, Maes M, Yücel M, Gama CS, Dodd S, Dean B, Magalhães PVS, Amminger P, McGorry P, Malhi GS. Pathways underlying neuroprogression in bipolar disorder: focus on inflammation, oxidative stress and neurotrophic factors. Neurosci Biobehav Rev 2010; 35:804-17. [PMID: 20934453 DOI: 10.1016/j.neubiorev.2010.10.001] [Citation(s) in RCA: 834] [Impact Index Per Article: 59.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Revised: 09/29/2010] [Accepted: 10/01/2010] [Indexed: 12/11/2022]
Abstract
There is now strong evidence of progressive neuropathological processes in bipolar disorder (BD). On this basis, the current understanding of the neurobiology of BD has shifted from an initial focus on monoamines, subsequently including evidence of changes in intracellular second messenger systems and more recently to, incorporating changes in inflammatory cytokines, corticosteroids, neurotrophins, mitochondrial energy generation, oxidative stress and neurogenesis into a more comprehensive model capable of explaining some of the clinical features of BD. These features include progressive shortening of the inter-episode interval with each recurrence, occurring in consort with reduced probability of treatment response as the illness progresses. To this end, emerging data shows that these biomarkers may differ between early and late stages of BD in parallel with stage-related structural and neurocognitive alterations. This understanding facilitates identification of rational therapeutic targets, and the development of novel treatment classes. Additionally, these pathways provide a cogent explanation for the efficacy of seemingly diverse therapies used in BD, that appear to share common effects on oxidative, inflammatory and neurotrophic pathways.
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Affiliation(s)
- M Berk
- Department of Clinical and Biomedical Sciences, University of Melbourne, Victoria 3010, Australia.
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Moro N, Sutton RL. Beneficial effects of sodium or ethyl pyruvate after traumatic brain injury in the rat. Exp Neurol 2010; 225:391-401. [PMID: 20670624 DOI: 10.1016/j.expneurol.2010.07.013] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2010] [Revised: 07/02/2010] [Accepted: 07/15/2010] [Indexed: 11/27/2022]
Abstract
Sodium pyruvate (SP) treatment initiated within 5 min post-injury is neuroprotective in a rat model of unilateral cortical contusion injury (CCI). The current studies examined: (1) effects of delayed SP treatments (1000 mg/kg, i.p., at 1, 12 and 24h), (2) effects of single (1h) or multiple (1, 12 and 24h) ethyl pyruvate treatments (EP; at 20 or 40 mg/kg, i.p.), and (3) mechanisms of action for pyruvate effects after CCI. In Experiment 1, both SP and EP treatment(s) significantly reduced the number of dead/dying cells in the ipsilateral hippocampus (dentate hilus+CA3(c) and/or CA3(a-b) regions) at 72 h post-CCI. Pyruvate treatment(s) attenuated CCI-induced reductions of cerebral cytochrome oxidase activity at 7 2h, significantly improving activity in peri-contusional cortex after multiple SP or EP treatments. Optical density measures of ipsilateral CD11b immuno-staining were significantly increased 72 h post-CCI, but these measures of microglia activation were not different from sham injury values in SP and EP groups with three post-CCI treatments. In Experiment 2, three treatments (1, 12 and 24h) of SP (1000 mg/kg) or EP (40 mg/kg) significantly improved recovery of beam-walking and neurological scores in the first 3 weeks after CCI, and EP treatments significantly improved spatial working memory 1 week post-CCI. Ipsilateral CA3(b) neuronal loss, but not cortical tissue loss, was significantly reduced 1 month post-CCI with pyruvate treatments begun 1h post-CCI. Thus, delayed pyruvate treatments after CCI are neuroprotective and improve neurobehavioral recovery; these effects may be mediated by improved metabolism and reduced inflammation.
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Affiliation(s)
- Nobuhiro Moro
- Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
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