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Lin SY, Chang CL, Liou KT, Kao YK, Wang YH, Chang CC, Kuo TBJ, Huang HT, Yang CCH, Liaw CC, Shen YC. The protective role of Achyranthes aspera extract against cisplatin-induced nephrotoxicity by alleviating oxidative stress, inflammation, and PANoptosis. J Ethnopharmacol 2024; 319:117097. [PMID: 37648176 DOI: 10.1016/j.jep.2023.117097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 08/19/2023] [Accepted: 08/24/2023] [Indexed: 09/01/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Achyranthes aspera, a widely recognized medicinal plant, is used in various cultures for treating different ailments, including renal dysfunction; however, there is a lack of comprehensive understanding of its protective effects and the underlying signaling networks involved. AIM OF THE STUDY This study aimed to investigate the molecular mechanisms of the action of A. aspera by employing an integrative approach including functional and tissue imaging as well as comprehensive genomics analysis. MATERIALS AND METHODS Cisplatin-induced nephrotoxicity is a well-established animal model for acute kidney injury (AKI). In this study, we investigated the protective effects and underlying mechanisms of the action of A. aspera water-soluble extract (AAW) on a murine model of cisplatin-induced AKI. The evaluation includes measurements of blood urea nitrogen (BUN) and serum creatinine (SCr) levels, histology examination, and transcriptome analysis using RNA sequencing. RESULTS In male ICR mice, oral administration of AAW at doses of 0.5-1.0 g/kg significantly reduced cisplatin-induced nephrotoxicity. This effect included the amelioration of tubular injury, renal fibrosis, and the lowering of BUN and SCr levels. AAW also effectively decreased oxidative markers, such as malondialdehyde (MDA) and nitrotyrosine (NT), along with inflammation markers, including COX-2, iNOS, NLRP3, and pP65NFκB. Moreover, AAW administration induced a dose-dependent increase in the expression of two protective factors, Nrf2 and BcL2, and suppressed apoptosis, as evidenced by reduced levels of truncated caspase 3 (t-Casp3). To explore the underlying molecular mechanisms and signaling networks, next-generation sequencing (NGS) analysis was employed. The results revealed that AAW mitigated apoptosis, necroptosis, and PANoptosis pathways by inhibiting inflammation signaling pathways, such as the TNFα-, NFκB-, NETs-, and leukocyte transendothelial migration pathways. Additionally, AAW was found to enhance protective signaling pathways, including the cGMP/PKG-, cAMP-, AMPK-, and mTOR-dependent activation of autophagy and mitophagy pathways. The primary bioactive compound found in AAW was identified as 20-hydroxyecdysone (0.36%). CONCLUSION Our study demonstrates that AAW reduces cisplatin-induced nephrotoxicity. The protective effects of AAW are attributed to its modulation of multiple molecular signaling networks. Specifically, AAW downregulates genes and signaling pathways associated with oxidative stress and endoplasmic reticulum (ER) stress, inflammation, and PANoptosis. Simultaneously, it upregulates genes and signaling pathways associated with cell survival, including autophagy and mitophagy pathways.
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Affiliation(s)
- Song-Yi Lin
- Institute of Brain Science, National Yang Ming Chiao Tung University, Taipei City, 112304, Taiwan.
| | - Chia-Lin Chang
- Department of Senior Citizen Welfare and Long-term Care Business, HungKuang University, Taichung City, 43302, Taiwan; Department of Animal Healthcare, HungKuang University, Taichung City, 43302, Taiwan; Department of Biotechnology, HungKuang University, Taichung City, 43302, Taiwan.
| | - Kuo-Tong Liou
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei City, 112304, Taiwan; Department of Medicine, Mackay Medical College, New Taipei City, 25245, Taiwan; Department of Chinese Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei City, 114202, Taiwan.
| | - Yao-Kai Kao
- Institute of Brain Science, National Yang Ming Chiao Tung University, Taipei City, 112304, Taiwan.
| | - Yea-Hwey Wang
- National Taipei University of Nursing and Health Science, Taipei City, 112304, Taiwan.
| | - Cher-Chia Chang
- Institute of Pharmacology, College of Medicine, National Yang Ming Chiao Tung University, Taipei City, 112304, Taiwan.
| | - Terry B J Kuo
- Institute of Brain Science, National Yang Ming Chiao Tung University, Taipei City, 112304, Taiwan.
| | - Hung-Tse Huang
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei City, 112304, Taiwan.
| | - Cheryl C H Yang
- Institute of Brain Science, National Yang Ming Chiao Tung University, Taipei City, 112304, Taiwan.
| | - Chia-Ching Liaw
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei City, 112304, Taiwan.
| | - Yuh-Chiang Shen
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei City, 112304, Taiwan; National Taipei University of Nursing and Health Science, Taipei City, 112304, Taiwan.
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Wei WC, Tsai KC, Liaw CC, Chiou CT, Tseng YH, Liao GY, Lin YC, Chiou WF, Liou KT, Yu IS, Shen YC, Su YC. NRICM101 ameliorates SARS-CoV-2-S1-induced pulmonary injury in K18-hACE2 mice model. Front Pharmacol 2023; 14:1125414. [PMID: 37416063 PMCID: PMC10320700 DOI: 10.3389/fphar.2023.1125414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 06/12/2023] [Indexed: 07/08/2023] Open
Abstract
The coronavirus disease 2019 (COVID-19) pandemic continues to represent a challenge for public health globally since transmission of different variants of the virus does not seem to be effectively affected by the current treatments and vaccines. During COVID-19 the outbreak in Taiwan, the patients with mild symptoms were improved after the treatment with NRICM101, a traditional Chinese medicine formula developed by our institute. Here, we investigated the effect and mechanism of action of NRICM101 on improval of COVID-19-induced pulmonary injury using S1 subunit of the SARS-CoV-2 spike protein-induced diffuse alveolar damage (DAD) of hACE2 transgenic mice. The S1 protein induced significant pulmonary injury with the hallmarks of DAD (strong exudation, interstitial and intra-alveolar edema, hyaline membranes, abnormal pneumocyte apoptosis, strong leukocyte infiltration, and cytokine production). NRICM101 effectively reduced all of these hallmarks. We then used next-generation sequencing assays to identify 193 genes that were differentially expressed in the S1+NRICM101 group. Of these, three (Ddit4, Ikbke, Tnfaip3) were significantly represented in the top 30 enriched downregulated gene ontology (GO) terms in the S1+NRICM101 group versus the S1+saline group. These terms included the innate immune response, pattern recognition receptor (PRR), and Toll-like receptor signaling pathways. We found that NRICM101 disrupted the interaction of the spike protein of various SARS-CoV-2 variants with the human ACE2 receptor. It also suppressed the expression of cytokines IL-1β, IL-6, TNF-α, MIP-1β, IP-10, and MIP-1α in alveolar macrophages activated by lipopolysaccharide. We conclude that NRICM101 effectively protects against SARS-CoV-2-S1-induced pulmonary injury via modulation of the innate immune response, pattern recognition receptor, and Toll-like receptor signaling pathways to ameliorate DAD.
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Affiliation(s)
- Wen-Chi Wei
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei, Taiwan
| | - Keng-Chang Tsai
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei, Taiwan
- Ph.D Program in Medical Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Chia-Ching Liaw
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei, Taiwan
- Department of Biochemical Science and Technology, National Chiayi University, Chiayi, Taiwan
| | - Chun-Tang Chiou
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei, Taiwan
| | - Yu-Hwei Tseng
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei, Taiwan
| | - Geng-You Liao
- Institute of Physiology, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Yu-Chi Lin
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei, Taiwan
| | - Wen-Fei Chiou
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei, Taiwan
| | - Kuo-Tong Liou
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei, Taiwan
| | - I-Shing Yu
- Laboratory Animal Center, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yuh-Chiang Shen
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei, Taiwan
| | - Yi-Chang Su
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei, Taiwan
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Wei WC, Liaw CC, Tsai KC, Chiou CT, Tseng YH, Chiou WF, Lin YC, Tsai CI, Lin CS, Lin CS, Liou KT, Yu IS, Shen YC, Su YC. Targeting spike protein-induced TLR/NET axis by COVID-19 therapeutic NRICM102 ameliorates pulmonary embolism and fibrosis. Pharmacol Res 2022; 184:106424. [PMID: 36064077 PMCID: PMC9443660 DOI: 10.1016/j.phrs.2022.106424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/21/2022] [Accepted: 08/31/2022] [Indexed: 11/19/2022]
Abstract
The global COVID-19 pandemic remains a critical public health threat, as existing vaccines and drugs appear insufficient to halt the rapid transmission. During an outbreak from May to August 2021 in Taiwan, patients with severe COVID-19 were administered NRICM102, which was a traditional Chinese medicine (TCM) formula developed based on its predecessor NRICM101 approved for treating mild cases. This study aimed to explore the mechanism of NRICM102 in ameliorating severe COVID-19-related embolic and fibrotic pulmonary injury. NRICM102 was found to disrupt spike protein/ACE2 interaction, 3CL protease activity, reduce activation of neutrophils, monocytes and expression of cytokines (TNF-α, IL-1β, IL-6, IL-8), chemokines (MCP-1, MIP-1, RANTES) and proinflammatory receptor (TLR4). NRICM102 also inhibited the spread of virus and progression to embolic and fibrotic pulmonary injury through reducing prothrombotic (vWF, PAI-1, NET) and fibrotic (c-Kit, SCF) factors, and reducing alveolar type I (AT1) and type II (AT2) cell apoptosis. NRICM102 may exhibit its protective capability via regulation of TLRs, JAK/STAT, PI3K/AKT, and NET signaling pathways. The study demonstrates the ability of NRICM102 to ameliorate severe COVID-19-related embolic and fibrotic pulmonary injury in vitro and in vivo and elucidates the underlying mechanisms.
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Affiliation(s)
- Wen-Chi Wei
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 112026, Taiwan
| | - Chia-Ching Liaw
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 112026, Taiwan; Department of Biochemical Science and Technology, National Chiayi University, Chiayi 600355, Taiwan
| | - Keng-Chang Tsai
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 112026, Taiwan; Ph.D. Program in Medical Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei 110301, Taiwan
| | - Chun-Tang Chiou
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 112026, Taiwan
| | - Yu-Hwei Tseng
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 112026, Taiwan
| | - Wen-Fei Chiou
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 112026, Taiwan
| | - Yu-Chi Lin
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 112026, Taiwan
| | - Chia-I Tsai
- Department of Traditional Chinese Medicine, Taichung Veterans General Hospital, Taichung 407204, Taiwan
| | - Chen-Shien Lin
- Department of Chinese Medicine, Taipei Hospital, Ministry of Health and Welfare, New Taipei City 424033, Taiwan
| | - Chen-Sung Lin
- Division of Thoracic Surgery, Department of Surgery, Taipei Hospital, Ministry of Health and Welfare, New Taipei City 424033, Taiwan
| | - Kuo-Tong Liou
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 112026, Taiwan
| | - I-Shing Yu
- Laboratory Animal Center, College of Medicine, National Taiwan University, Taipei 100233, Taiwan
| | - Yuh-Chiang Shen
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 112026, Taiwan.
| | - Yi-Chang Su
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 112026, Taiwan.
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Chern CM, Zhou H, Wang YH, Chang CL, Chiou WF, Chang WT, Yao CH, Liou KT, Shen YC. Osthole ameliorates cartilage degradation by downregulation of NF-κB and HIF-2α pathways in an osteoarthritis murine model. Eur J Pharmacol 2019; 867:172799. [PMID: 31765607 DOI: 10.1016/j.ejphar.2019.172799] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 11/14/2019] [Accepted: 11/14/2019] [Indexed: 10/25/2022]
Abstract
Osteoarthritis (OA) is a common and disabling joint disease mainly characterized by cartilage degradation, with the knees most commonly affected. No effective treatment for the cartilage degradation of OA exists. Preliminary studies have revealed the protective and osteogenic effects of osthole, a natural coumarin first isolated from Cnidium monnieri (Fructus Cnidii); however, no evidence of osthole in an OA-related model has been published to date. This study further explored the effects of osthole in a monoiodoacetate (MIA)-induced OA-related animal model and focused on the molecular mechanism(s) behind the anti-inflammatory and cartilage protective effects of osthole. This study revealed that the cartilage protective effect of osthole in a MIA-induced osteoarthritis (OA) murine model can be explained by downregulation of COX-2 and RUNX2 by inhibition of NF-κB and HIF-2α up-regulated by OA induction, resulting in downregulation of MMP-13, Syndecan IV and ADAMTS-5. In addition, osthole might have anti-inflammatory and analgesic effects due to COX-2 inhibition. Osthole can be considered as a potential component of the treatment of OA, for it possesses a cartilage protective effect, as well as anti-inflammation, analgesic, and movement improving effects. Further preclinical and human clinical studies are needed to examine the efficacy and safety profile of long-term therapy.
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Affiliation(s)
- Chang-Ming Chern
- Taipei Municipal Gan-Dau Hospital, Taipei City, Taiwan; Division of Neurovascular Disease, Neurological Institute, Taipei Veterans General Hospital, Taipei City, Taiwan; Institute of Brain Science, School of Medicine, National Yang-Ming University, Taipei City, Taiwan
| | - Han Zhou
- Division of Pharmacology, Department of Pharmaceutical Sciences, Utrecht University, Netherlands
| | - Yea-Hwey Wang
- National Taipei University of Nursing and Health Sciences, Taipei City, Taiwan
| | - Chia-Lin Chang
- Research Institute of Biotechnology, HungKuang University, Taichung City, Taiwan
| | - Wen-Fei Chiou
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei City, Taiwan; Clinical Drug Development of Herbal Medicine, College of Pharmacy, Taipei Medical University, Taipei City, Taiwan
| | - Wen-Te Chang
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung City, Taiwan
| | - Chun-Hsu Yao
- Department of Biomedical Imaging and Radiological Science, China Medical University, Taichung City, Taiwan
| | - Kuo-Tong Liou
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei City, Taiwan; Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Department of Chinese Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei City, Taiwan
| | - Yuh-Chiang Shen
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei City, Taiwan; National Taipei University of Nursing and Health Sciences, Taipei City, Taiwan; Clinical Drug Development of Herbal Medicine, College of Pharmacy, Taipei Medical University, Taipei City, Taiwan.
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Wang YH, Chern CM, Liou KT, Kuo YH, Shen YC. Ergostatrien-7,9(11),22-trien-3β-ol from Antrodia camphorata ameliorates ischemic stroke brain injury via downregulation of p65NF-κ-B and caspase 3, and activation of Akt/GSK3/catenin-associated neurogenesis. Food Funct 2019; 10:4725-4738. [PMID: 31304955 DOI: 10.1039/c9fo00908f] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Antrodia camphorata is a well-known traditional Chinese mushroom used as a functional food and nutraceutical in Taiwan and China. The aim of this study was to explore the protective effects and mechanism(s) of the ethyl acetate crude extract of A. camphorata (EtOAc-AC) and its active constituent ergostatrien-7,9(11),22-trien-3β-ol (EK100) in an acute ischemic stroke (AIS) murine model. Treating mice with induced AIS injury by using EtOAc-AC (0.3-0.6 g kg-1, p.o.) and EK100 (60 and 120 mg kg-1, p.o.) 2 h after AIS induction significantly increased the tracking distance and reduced brain infarction. Both EtOAc-AC and EK-100 reduced the expression levels of p65NF-κB and caspase 3 near the peri-infarct cortex and promoted the expression of neurogenesis-associated protein doublecortin (DCX) near the hippocampus, accompanied by glycogen synthase kinase 3 (GSK-3) inhibition and β-catenin upregulation. Signaling pathway analysis revealed that the advantageous effects of EtOAc-AC and EK-100 involved triggering the activation of PI3K/Akt and inhibition of GSK-3. Our findings suggest that EtOAc-AC and its active constituent EK100 display anti-inflammatory and anti-apoptotic activities. Both EtOAc-AC and EK100 reduce ischemic brain injury by decreasing p65NF-κB and caspase 3 expression, and they promote neurogenesis (DCX) and neuroprotection (Bcl2) by activating the PI3k/Akt-associated GSK3 inhibition and β-catenin activation.
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Affiliation(s)
- Yea-Hwey Wang
- National Taipei University of Nursing and Health Sciences, Taipei City, Taiwan
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Wang YH, Liou KT, Tsai KC, Liu HK, Yang LM, Chern CM, Shen YC. GSK-3 inhibition through GLP-1R allosteric activation mediates the neurogenesis promoting effect of P7C3 after cerebral ischemic/reperfusional injury in mice. Toxicol Appl Pharmacol 2018; 357:88-105. [PMID: 30189238 DOI: 10.1016/j.taap.2018.08.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 08/30/2018] [Accepted: 08/31/2018] [Indexed: 12/22/2022]
Abstract
An aminopropyl carbazole compound, P7C3, has been shown to be a potent neurogenesis promoting agent; however, its fundamental signaling action has yet to be elucidated. A cerebral ischemic/reperfusional (CI/R) injury model in mice was implemented to elucidate the neuronal protective mechanism(s) of P7C3. Treating CI/R mice using P7C3 (50-100 μg/kg, i.v.) significantly improved tracking distance and walking behavior, and reduced brain damage. Specifically, P7C3 promoted the expression of neurogenesis-associated proteins, including doublecortin, beta tubulin III (β-tub3), adam11 and adamts20, near the peri-infarct cortex, accompanied by glycogen synthase kinase 3 (GSK-3) inhibition and β-catenin upregulation. The application of a specific inhibitor against glucagon-like peptide 1 receptor (GLP-1R), exendin(9-39), revealed that the beneficial effects of P7C3 involved triggering the activation of GLP-1R-associated PKA/Akt signaling. P7C3 elicited the GLP-1R-dependent intracellular cAMP increment and the insulin secretion in cellular models. Surface plasmon resonance assay of P7C3 showed a Kd value of 0.53 μM for GLP-1R binding, and the docking of P7C3 to the putative active site on GLP-1R was successfully predicted by molecular modeling. Our findings indicate that P7C3 promotes the expression of neurogenesis proteins by activation of the cAMP/PKA-dependent and Akt/GSK3-associated β-catenin through positive allosteric stimulation of GLP-1R. Within the P7C3 class of neuroprotective molecules, this mechanism appears to be unique to the prototypical P7C3 molecule, as other active derivatives such as P7C2-A20 and P7C3-S243 they do not engage this same pathway and have been shown to work by nicotinamide phosphoribosyltransferase (NAMPT) stimulation.
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Affiliation(s)
- Yea-Hwey Wang
- National Taipei University of Nursing and Health Sciences, Taipei City, Taiwan
| | - Kuo-Tong Liou
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei City, Taiwan; Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Department of Chinese Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei City, Taiwan
| | - Keng-Chang Tsai
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei City, Taiwan; Ph.D. Program for Medical Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei City, Taiwan
| | - Hui-Kang Liu
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei City, Taiwan; Ph.D. Program for the Clinical Drug Discovery from Botanical Herbs, College of Pharmacy, Taipei Medical University, Taipei City, Taiwan
| | - Li-Ming Yang
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei City, Taiwan; School of Pharmacy, Taipei Medical University, Taipei City, Taiwan
| | - Chang-Ming Chern
- Division of Neurovascular Disease, Neurological Institute, Taipei Veterans General Hospital, Taiwan; Taipei Municipal Gan-Dau Hospital, Taiwan; Institute of Brain Science, School of Medicine, National Yang-Ming University, Taipei City, Taiwan
| | - Yuh-Chiang Shen
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei City, Taiwan; National Taipei University of Nursing and Health Sciences, Taipei City, Taiwan; Ph.D. Program for the Clinical Drug Discovery from Botanical Herbs, College of Pharmacy, Taipei Medical University, Taipei City, Taiwan.
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Chen HJ, Shen YC, Shiao YJ, Liou KT, Hsu WH, Hsieh PH, Lee CY, Chen YR, Lin YL. Multiplex Brain Proteomic Analysis Revealed the Molecular Therapeutic Effects of Buyang Huanwu Decoction on Cerebral Ischemic Stroke Mice. PLoS One 2015; 10:e0140823. [PMID: 26492191 PMCID: PMC4619651 DOI: 10.1371/journal.pone.0140823] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 09/29/2015] [Indexed: 11/18/2022] Open
Abstract
Stroke is the second-leading cause of death worldwide, and tissue plasminogen activator (TPA) is the only drug used for a limited group of stroke patients in the acute phase. Buyang Huanwu Decoction (BHD), a traditional Chinese medicine prescription, has long been used for improving neurological functional recovery in stroke. In this study, we characterized the therapeutic effect of TPA and BHD in a cerebral ischemia/reperfusion (CIR) injury mouse model using multiplex proteomics approach. After the iTRAQ-based proteomics analysis, 1310 proteins were identified from the mouse brain with <1% false discovery rate. Among them, 877 quantitative proteins, 10.26% (90/877), 1.71% (15/877), and 2.62% (23/877) of the proteins was significantly changed in the CIR, BHD treatment, and TPA treatment, respectively. Functional categorization analysis showed that BHD treatment preserved the integrity of the blood–brain barrier (BBB) (Alb, Fga, and Trf), suppressed excitotoxicity (Grm5, Gnai, and Gdi), and enhanced energy metabolism (Bdh), thereby revealing its multiple effects on ischemic stroke mice. Moreover, the neurogenesis marker doublecortin was upregulated, and the activity of glycogen synthase kinase 3 (GSK-3) and Tau was inhibited, which represented the neuroprotective effects. However, TPA treatment deteriorated BBB breakdown. This study highlights the potential of BHD in clinical applications for ischemic stroke.
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Affiliation(s)
- Hong-Jhang Chen
- National Research Institute of Chinese Medicine, Taipei, Taiwan
- Institute of Food Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Yuh-Chiang Shen
- National Research Institute of Chinese Medicine, Taipei, Taiwan
| | - Young-Ji Shiao
- National Research Institute of Chinese Medicine, Taipei, Taiwan
| | - Kuo-Tong Liou
- Department of Chinese Martial Arts and Graduate Institute of Sport Coaching Science, Chinese Culture University, Taipei, Taiwan
| | - Wei-Hsiang Hsu
- National Research Institute of Chinese Medicine, Taipei, Taiwan
| | - Pei-Hsuan Hsieh
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
| | - Chi-Ying Lee
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
| | - Yet-Ran Chen
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
- * E-mail: (YLL); (YRC)
| | - Yun-Lian Lin
- National Research Institute of Chinese Medicine, Taipei, Taiwan
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung, Taiwan
- School of Pharmacy, National Taiwan University, Taipei, Taiwan
- * E-mail: (YLL); (YRC)
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Shen YC, Lu CK, Liou KT, Hou YC, Lin YL, Wang YH, Sun HJ, Liao KH, Wang HW. Common and unique mechanisms of Chinese herbal remedies on ischemic stroke mice revealed by transcriptome analyses. J Ethnopharmacol 2015; 173:370-382. [PMID: 26239152 DOI: 10.1016/j.jep.2015.07.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 05/26/2015] [Accepted: 07/16/2015] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Four traditional Chinese herbal remedies (CHR) including Buyang Huanwu decoction (BHD), Xuefu Zhuyu decoction (XZD), Tianma Gouteng decoction (TGD) and Shengyu decoction (SYD) are popular used in treating brain-related dysfunction clinically with different syndrome/pattern based on traditional Chinese medicine (TCM) principles, yet their neuroprotective mechanisms are still unclear. MATERIALS AND METHODS Mice were subjected to an acute ischemic stroke to examine the efficacy and molecular mechanisms of action underlying these CHR. RESULTS CHR treatment significantly enhanced the survival rate of stroke mice, with BHD being the most effective CHR. All CHR were superior to recombinant tissue-type plasminogen activator (rt-PA) treatment in successfully ameliorating brain function, infarction, and neurological deficits in stroke mice that also paralleled to improvements in blood-brain barrier damage, inflammation, apoptosis, and neurogenesis. Transcriptome analyses reveals that a total of 774 ischemia-induced probe sets were significantly modulated by four CHR, including 52 commonly upregulated genes and 54 commonly downregulated ones. Among them, activation of neurogenesis-associated signaling pathways and down-regulating inflammation and apoptosis pathways are key common mechanisms in ischemic stroke protection by all CHR. Besides, levels of plasma CX3CL1 and S100a9 in patients could be used as biomarkers for therapeutic evaluation before functional recovery could be observed. CONCLUSION Our results suggest that using CHR, a combinatory cocktail therapy, is a better way than rt-PA for treating cerebral ischemic-associated diseases through modulating a common as well as a specific group of genes/pathways that may partially explain the syndrome differentiation and treatment principle in TCM.
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Affiliation(s)
- Yuh-Chiang Shen
- National Research Institute of Chinese Medicine, Taipei, Taiwan; Institute of Biomedical Sciences, National Chung-Hsing University, Taichung, Taiwan; National Taipei University of Nursing and Health Science, , Taipei,Taiwan.
| | - Chung-Kuang Lu
- National Research Institute of Chinese Medicine, Taipei, Taiwan
| | - Kuo-Tong Liou
- Department of Chinese Martial Arts and Graduate Institute of Sport Coaching Science, Chinese Culture University, Taipei, Taiwan
| | - Yu-Chang Hou
- Department of Traditional Medicine, Tao-yuan General Hospital, Department of Health, Tao-yuan, Taiwan; Department of Bioscience Technology, Chuan‑yuan Christian University, Taoyuan, Taiwan
| | - Yun-Lan Lin
- National Research Institute of Chinese Medicine, Taipei, Taiwan; School of Pharmacy, National Taiwan University, Taipei, Taiwan
| | - Yea-Hwey Wang
- Division of Neurovascular Disease, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan; National Taipei University of Nursing and Health Science, , Taipei,Taiwan
| | - Hsing-Jen Sun
- Institute of Biomedical Informatics, National Yang-Ming University, Taipei, Taiwan
| | - Ko-Hsun Liao
- Institute of Microbiology and Immunology, National Yang-Ming University, Taipei, Taiwan
| | - Hsei-Wei Wang
- Institute of Microbiology and Immunology, National Yang-Ming University, Taipei, Taiwan; Cancer Research Center and Genome Research Center, National Yang-Ming University, Taipei, Taiwan; Institute of Biomedical Informatics, National Yang-Ming University, Taipei, Taiwan; Departments of Education and Research, Taipei City Hospital, Taipei, Taiwan
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Hou YC, Lu CK, Wang YH, Chern CM, Liou KT, Wang HW, Shen YC. Unique mechanisms of sheng yu decoction ( shèng yù tang) on ischemic stroke mice revealed by an integrated neurofunctional and transcriptome analysis. J Tradit Complement Med 2014; 3:240-9. [PMID: 24716184 PMCID: PMC3925003 DOI: 10.4103/2225-4110.119703] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Sheng Yu Decoction ( Shèng Yù Tang; SYD) is a popular traditional Chinese medicine (TCM) remedy used in treating cardiovascular and brain-related dysfunction clinically; yet, its neuroprotective mechanisms are still unclear. Here, mice were subjected to an acute ischemic stroke to examine the efficacy and mechanisms of action of SYD by an integrated neurofunctional and transcriptome analysis. More than 80% of the mice died within 2 days after ischemic stroke with vehicle treatment. Treatments with SYD (1.0 g/kg, twice daily, orally or p.o.) and recombinant thrombolytic tissue plasminogen activator (rt-PA; 10 mg/kg, once daily, intravenously or i.v.) both significantly extended the lifespan as compared to that of the vehicle-treated stroke group. SYD successfully restored brain function, ameliorated cerebral infarction and oxidative stress, and significantly improved neurological deficits in mice with stroke. Molecular impact of SYD by a genome-wide transcriptome analysis using brains from stroke mice showed a total of 162 out of 2081 ischemia-induced probe sets were significantly influenced by SYD. Mining the functional modules and genetic networks of these 162 genes revealed a significant upregulation of neuroprotective genes in Wnt receptor signaling pathway (3 genes) and regulation of cell communication (7 genes) and downregulation of destructive genes in response to stress (13 genes) and in the induction of inflammation (5 genes), cytokine production (4 genes), angiogenesis (3 genes), vasculature (6 genes) and blood vessel (5 genes) development, wound healing (7 genes), defense response (7 genes), chemotaxis (4 genes), immune response (7 genes), antigen processing and presenting (3 genes), and leukocyte-mediated cytotoxicity (2 genes) by SYD. Our results suggest that SYD could protect mice against ischemic stroke primarily through significantly downregulating the damaging genes involved in stress, inflammation, angiogenesis, blood vessel formation, immune responses, and wound healing, as well as upregulating the genes mediating neurogenesis and cell communication, which make SYD beneficial for treating ischemic stroke.
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Affiliation(s)
- Yu-Chang Hou
- Department of Traditional Medicine, Tao-yuan General Hospital, Department of Health, Tao-yuan, Taiwan. ; Department of Bioscience Technology, Chuan-yuan Christian University, Taoyuan, Taiwan
| | - Chung-Kuang Lu
- Division of Clinical Chinese Medicine, National Research Institute of Chinese Medicine, Taipei, Taiwan
| | - Yea-Hwey Wang
- National Taipei University of Nursing and Health Science, Taipei, Taiwan
| | - Chang-Ming Chern
- Division of Neurovascular Disease, Neurological Institute, Taipei Veterans General Hospital and School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Kuo-Tong Liou
- Department of Chinese Martial Arts and Graduate Institute of Sport Coaching Science, Chinese Culture University, Taipei, Taiwan
| | - Hsei-Wei Wang
- Institute of Microbiology and Immunology, and Cancer Research Center and Genome Research Center, National Yang-Ming University, Taipei, Taiwan
| | - Yuh-Chiang Shen
- Division of Clinical Chinese Medicine, National Research Institute of Chinese Medicine, Taipei, Taiwan. ; National Taipei University of Nursing and Health Science, Taipei, Taiwan. ; Institute of Biomedical Sciences, National Chung-Hsing University, Taichung, Taiwan
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Chern CM, Wang YH, Liou KT, Hou YC, Chen CC, Shen YC. 2-Methoxystypandrone ameliorates brain function through preserving BBB integrity and promoting neurogenesis in mice with acute ischemic stroke. Biochem Pharmacol 2014; 87:502-14. [DOI: 10.1016/j.bcp.2013.11.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 11/20/2013] [Accepted: 11/22/2013] [Indexed: 11/15/2022]
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Shen YC, Yen JC, Liou KT. Ameliorative Effects of Caffeic Acid Phenethyl Ester on an Eccentric Exercise-Induced Skeletal Muscle Injury by Down-Regulating NF-κB Mediated Inflammation. Pharmacology 2013; 91:219-28. [DOI: 10.1159/000348412] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Accepted: 01/21/2013] [Indexed: 11/19/2022]
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Wang HW, Liou KT, Wang YH, Lu CK, Lin YL, Lee IJ, Huang ST, Tsai YH, Cheng YC, Lin HJ, Shen YC. Deciphering the neuroprotective mechanisms of Bu-yang Huan-wu decoction by an integrative neurofunctional and genomic approach in ischemic stroke mice. J Ethnopharmacol 2011; 138:22-33. [PMID: 21784143 DOI: 10.1016/j.jep.2011.06.033] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Revised: 06/03/2011] [Accepted: 06/21/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Bu-yang Huan-wu decoction (BHD) is a famous traditional Chinese medicine formula that has been used clinically in Asia to treat stroke-induced disability for centuries, but the underlying neuroprotective mechanisms are not fully understood. AIM OF THE STUDY In this study, we aim to investigate the mechanisms of action using an integrative neurofunctional and broad genomics approach. MATERIALS AND METHODS Male ICR mice were subjected to an acute ischemic stroke by inducing a middle cerebral ischemic/reperfusion (CI/R) injury. To examine whether BHD could extend the lifespan of mice with a stroke, we used oral administration of BHD (0.5 and 1.0g/kg) twice daily starting from 2h after ischemia and compared this with vehicle control treatments, recombinant tissue-type plasminogen activator (rt-PA, 10mg/kg, i.v.), and MK-801 (0.2mg/kg, i.p.). An integrative neurofunctional and genomic approach was performed to elucidate the underlying molecular mechanisms of BHD. RESULTS More than 80% of the mice died within 2 days after stroke induction in the vehicle control treatment group. However, the survival rates and life-spans of mice treated with BHD, rt-PA and MK-801 were significantly enhanced as compared to the vehicle-treated CI/R group in all three cases. Mice treated with BHD (1.0g/kg) showed the greatest protective effect across all groups. BHD successfully restored brain function, ameliorated the cerebral infarction, and significantly improved the neurological deficits of the mice with a stroke. BHD also reduced inflammation, oxidative stress, and apoptosis, as well as improved neurogenesis. The molecular impacts of BHD were assessed by genome-wide transcriptome analysis using brains from the CI/R mice. The results showed a total of 377 ischemia-induced probe-sets that were significantly influenced by BHD including 93 probe-sets that were commonly more abundant in BHD-treated and sham mice, and another 284 ischemia-induced probe sets that were suppressed by BHD. Mining the functional modules and genetic networks of these 377 genes revealed a significant upregulation of neuroprotective genes associated with neurogenesis (6 genes) and nervous system development (9 genes), and a significant down-regulation of destructive genes associated with the induction of inflammation (14 genes), apoptosis (15 genes), angiogenesis (11 genes) and blood coagulation (7 genes) by BHD. CONCLUSIONS Our results suggested that BHD is able to protect mice against stroke and extend lifespan primarily through a significant down-regulation of genes involved in inflammation, apoptosis, angiogenesis and blood coagulation, as well as an up-regulation of genes mediating neurogenesis and nervous system development. The changes in expression after treatment with BHD are beneficial after ischemic stroke.
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Affiliation(s)
- Hsei-Wei Wang
- Institute of Microbiology and Immunology, National Yang-Ming University, Taipei, Taiwan
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Chern CM, Liou KT, Wang YH, Liao JF, Yen JC, Shen YC. Andrographolide inhibits PI3K/AKT-dependent NOX2 and iNOS expression protecting mice against hypoxia/ischemia-induced oxidative brain injury. Planta Med 2011; 77:1669-1679. [PMID: 21512969 DOI: 10.1055/s-0030-1271019] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
This study aimed to explore the mechanisms by which andrographolide protects against hypoxia-induced oxidative/nitrosative brain injury provoked by cerebral ischemic/reperfusion (CI/R) injury in mice. Hypoxia IN VITRO was modeled using oxygen-glucose deprivation (OGD) followed by reoxygenation of BV-2 microglial cells. Our results showed that treatment of mice that have undergone CI/R injury with andrographolide (10-100 µg/kg, i. v.) at 1 h after hypoxia ameliorated CI/R-induced oxidative/nitrosative stress, brain infarction, and neurological deficits in the mice, and enhanced their survival rate. CI/R induced a remarkable production in the mouse brains of reactive oxygen species (ROS) and a significant increase in protein nitrosylation; this primarily resulted from enhanced expression of NADPH oxidase 2 (NOX2), inducible nitric oxide synthase (iNOS), and the infiltration of CD11b cells due to activation of nuclear factor-kappa B (NF- κB) and hypoxia-inducible factor 1-alpha (HIF-1 α). All these changes were significantly diminished by andrographolide. In BV-2 cells, OGD induced ROS and nitric oxide production by upregulating NOX2 and iNOS via the phosphatidylinositol-3-kinase (PI3K)/AKT-dependent NF- κB and HIF-1 α pathways, and these changes were suppressed by andrographolide and LY294002. Our results indicate that andrographolide reduces NOX2 and iNOS expression possibly by impairing PI3K/AKT-dependent NF- κB and HIF-1 α activation. This compromises microglial activation, which then, in turn, mediates andrographolide's protective effect in the CI/R mice.
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Affiliation(s)
- Chang-Ming Chern
- Department of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
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Chang CC, Wang YH, Chern CM, Liou KT, Hou YC, Peng YT, Shen YC. Prodigiosin inhibits gp91(phox) and iNOS expression to protect mice against the oxidative/nitrosative brain injury induced by hypoxia-ischemia. Toxicol Appl Pharmacol 2011; 257:137-47. [PMID: 21925195 DOI: 10.1016/j.taap.2011.08.027] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Revised: 08/29/2011] [Accepted: 08/29/2011] [Indexed: 01/30/2023]
Abstract
This study aimed to explore the mechanisms by which prodigiosin protects against hypoxia-induced oxidative/nitrosative brain injury induced by middle cerebral artery occlusion/reperfusion (MCAo/r) injury in mice. Hypoxia in vitro was modeled using oxygen-glucose deprivation (OGD) followed by reoxygenation of BV-2 microglial cells. Our results showed that treatment of mice that have undergone MCAo/r injury with prodigiosin (10 and 100μg/kg, i.v.) at 1h after hypoxia ameliorated MCAo/r-induced oxidative/nitrosative stress, brain infarction, and neurological deficits in the mice, and enhanced their survival rate. MCAo/r induced a remarkable production in the mouse brains of reactive oxygen species (ROS) and a significant increase in protein nitrosylation; this primarily resulted from enhanced expression of NADPH oxidase 2 (gp91(phox)), inducible nitric oxide synthase (iNOS), and the infiltration of CD11b leukocytes due to breakdown of blood-brain barrier (BBB) by activation of nuclear factor-kappa B (NF-κB). All these changes were significantly diminished by prodigiosin. In BV-2 cells, OGD induced ROS and nitric oxide production by up-regulating gp91(phox) and iNOS via activation of the NF-κB pathway, and these changes were suppressed by prodigiosin. In conclusion, our results indicate that prodigiosin reduces gp91(phox) and iNOS expression possibly by impairing NF-κB activation. This compromises the activation of microglial and/or inflammatory cells, which then, in turn, mediates prodigiosin's protective effect in the MCAo/r mice.
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Affiliation(s)
- Chia-Che Chang
- Institute of Biomedical Sciences, National Chung-Hsing University, Taichung, Taiwan
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Hou YC, Liou KT, Chern CM, Wang YH, Liao JF, Chang S, Chou YH, Shen YC. Preventive effect of silymarin in cerebral ischemia-reperfusion-induced brain injury in rats possibly through impairing NF-κB and STAT-1 activation. Phytomedicine 2010; 17:963-73. [PMID: 20833521 DOI: 10.1016/j.phymed.2010.03.012] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2009] [Revised: 02/11/2010] [Accepted: 03/13/2010] [Indexed: 05/29/2023]
Abstract
Silymarin and silibinin are bioactive components isolated from Silybum marianum. They have been reported to exhibit anti-oxidative and anti-inflammatory effects. Many studies revealed that drugs with potent anti-inflammatory potential can protect animals against inflammation-associated neurodegenerative disease, e.g., stroke. In this current work we established an animal model of acute ischemic stroke injury by inducing cerebral ischemic/reperfusion (CI/R) in rats to elucidate whether silymarin or silibinin can protect animals from CI/R injury. Pretreatment with silymarin, but not silibinin, dose-dependently (1-10μg/kg, i.v.) reduced CI/R-induced brain infarction by 16-40% and improved neurological deficits in rats with a stroke. Elevated pathophysiological biomarkers for CI/R-induced brain injury, including lipid peroxidation, protein nitrosylation, and oxidative stress, were all reduced by silymarin. In addition, expression of inflammation-associated proteins (e.g., inducible nitric oxide synthase, cyclooxygenase-2 and myeloperoxidase), and transcriptional factors (e.g., nuclear factor (NF)-kappa B and signal transducer and activator of transcription (STAT)-1), as well as production of proinflammatory cytokine (e.g., interleukin-1β and tumor necrosis factor-α) was all significantly prevented by silymarin. Furthermore, an in vitro study on microglial BV2 cells showed that silymarin could inhibit nitric oxide and superoxide anion production, possibly by interfering with NF-κB nuclear translocation/activation. Likewise, silymarin pretreatment also inhibited IκB-α degradation and NF-κB nuclear translocation in brain tissues of ischemic rats. Our results reveal that silymarin, but not its active component silibinin, protected rats against CI/R-induced stroke injury by amelioration of the oxidative and nitrosative stresses and inflammation-mediated tissue injury through impeding the activation of proinflammatory transcription factors (e.g., NF-κB and STAT-1) in the upregulation of proinflammatory proteins and cytokines in stroke-damaged sites. In conclusion, silymarin displays beneficial effects of preventing inflammation-related neurodegenerative disease, e.g., stroke, which needs further investigation and clinical evidences.
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Affiliation(s)
- Yu-Chang Hou
- Department of Chinese Medicine, Taoyuan General Hospital, Department of Health, Department of Nursing, Yuanpei University, Hsinchu, Taiwan
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Lin LC, Wang YH, Hou YC, Chang S, Liou KT, Chou YC, Wang WY, Shen YC. The inhibitory effect of phenylpropanoid glycosides and iridoid glucosides on free radical production and β2 integrin expression in human leucocytes. J Pharm Pharmacol 2010; 58:129-35. [PMID: 16393473 DOI: 10.1211/jpp.58.1.0016] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Abstract
Rapid production of reactive oxygen species (ROS) and upregulation of β2 integrin by leucocytes are two important inflammatory responses in human leucocytes. To evaluate whether three phenylpropanoid glycosides (acteoside, crenatoside, and rossicaside B) and two iridoid glucosides (boschnaloside and 8-epideoxyloganic acid) identified from two medicinal plants with similar indications (Orobanche caerulescens and Boschniakia rossica) exhibited anti-inflammatory activity, their effects on N-formyl-methionyl-leucyl-phenylalanine (fMLP) and phorbol-12-myristate-13-acetate (PMA)-activated peripheral human neutrophils (PMNs) and mononuclear cells were examined. Pretreatment with 1–50 μm phenylpropanoid glycoside concentration-dependently diminished PMA- and fMLP-induced ROS production with IC50 values of approximately 6.8–23.9 and 3.0–8.8 μm, respectively. Iridoid glucoside was less effective than phenylpropanoid glycoside with an IC50 value of approximately 8.9–28.4 μm in PMA-activated PMNs and 19.1–21.1 μm in fMLP-activated mononuclear cells. Phenylpropanoid glycosides also effectively inhibited NADPH oxidase (NOX) and displayed potent free radical-scavenging activity, but did not interfere with pan-protein kinase C (PKC) activity. Furthermore, all compounds, except rossicaside B, significantly inhibited PMA- and fMLP-induced Mac-1 (a β2 integrin) upregulation at 50 μm but not that of fMLP-induced intracellular calcium mobilization. These drugs had no significant cytotoxicity as compared with the vehicle control. Our data suggested that inhibition of ROS production, possibly through modulation of NOX activity and/or the radical scavenging effect, and β2 integrin expression in leucocytes indicated that these compounds had the potential to serve as anti-inflammatory agents during oxidative stress.
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Affiliation(s)
- Lie-Chwen Lin
- National Research Institute of Chinese Medicine, Taipei, Taiwan
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Chiang J, Shen YC, Wang YH, Hou YC, Chen CC, Liao JF, Yu MC, Juan CW, Liou KT. Honokiol protects rats against eccentric exercise-induced skeletal muscle damage by inhibiting NF-kappaB induced oxidative stress and inflammation. Eur J Pharmacol 2009; 610:119-27. [PMID: 19303869 DOI: 10.1016/j.ejphar.2009.03.035] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Revised: 03/10/2009] [Accepted: 03/11/2009] [Indexed: 11/17/2022]
Abstract
Honokiol, a bioactive component isolated from the Chinese herb Magnolia officinalis, is known for its potent antioxidative and anti-inflammatory effects. To study whether honokiol can protect skeletal muscle from sports injuries, we set up an eccentric exercise bout protocol for rats consisting of downhill running on a treadmill and examined the effect of oral administration of honokiol at 1 h before eccentric exercise at a dose of 5 mg/kg on day 1 (HK5 x 1) or 1 mg/kg/day for 5 consecutive days (HK1 x 5). Eccentric exercise was implemented for 3-5 consecutive days, and induced remarkable tissue damage. This damage was associated with an increase in serum creatine levels, increase in protein nitrotyrosylation, poly-ADP-ribose-polymerase (PARP) upregulation, lipid peroxidation, and leukocyte infiltration. The degree of muscle damage also paralleled dramatic gene expression for cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS), and inflammation-associated cytokines (interleukin (IL)-1beta, IL-6, tumor necrosis factor-alpha, and monocyte chemoattractant protein-1), possibly through activation of nuclear factor kappa-B (NF-kappaB), a crucial proinflammatory transcription factor. Both honokiol treatments (HK5 x 1 and HK1 x 5) significantly ameliorated eccentric exercise-induced muscle damage as revealed by suppression of cell fragmentation, protein nitrotyrosylation and PARP upregulation, as well as reductions in lipid peroxidation and leukocyte infiltration, possibly through downregulating gene expression for COX-2, iNOS, and the proinflammatory cytokines by modulation of NF-kappaB activation. In conclusion, the present study demonstrates for the first time that honokiol exhibits protective effects against eccentric exercise-induced skeletal muscle damage in rats, probably by modulating inflammation-mediated damage to muscle cells.
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Affiliation(s)
- Jasson Chiang
- Graduate Institute of Sport Coaching Science, Chinese Culture University, Taipei, Taiwan
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Shen YC, Wang YH, Chou YC, Liou KT, Yen JC, Wang WY, Liao JF. Dimemorfan protects rats against ischemic stroke through activation of sigma-1 receptor-mediated mechanisms by decreasing glutamate accumulation. J Neurochem 2008; 104:558-72. [PMID: 18173806 DOI: 10.1111/j.1471-4159.2007.05058.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Dimemorfan, an antitussive and a sigma-1 (sigma(1)) receptor agonist, has been reported to display neuroprotective properties. We set up an animal model of ischemic stroke injury by inducing cerebral ischemia (for 1 h) followed by reperfusion (for 24 h) (CI/R) in rats to examine the protective effects and action mechanisms of dimemorfan against stroke-induced damage. Treatment with dimemorfan (1.0 microg/kg and 10 microg/kg, i.v.) either 15 min before ischemia or at the time of reperfusion, like the putative sigma(1) receptor agonist, PRE084 (10 microg/kg, i.v.), ameliorated the size of the infarct zone by 67-72% or 51-52%, respectively, which was reversed by pre-treatment with the selective sigma(1) receptor antagonist, BD1047 (20 microg/kg, i.v.). Major pathological mechanisms leading to CI/R injury including excitotoxicity, oxidative/nitrosative stress, inflammation, and apoptosis are all downstream events initiated by excessive accumulation of extracellular glutamate. Dimemorfan treatment (10 microg/kg, i.v., at the time of reperfusion) inhibited the expressions of monocyte chemoattractant protein-1 and interleukin-1beta, which occurred in parallel with decreases in neutrophil infiltration, activation of inflammation-related signals (p38 mitogen-activated protein kinase, nuclear factor-kappaB, and signal transducer and activator of transcription-1), expression of neuronal and inducible nitric oxide synthase, oxidative/nitrosative tissue damage (lipid peroxidation, protein nitrosylation, and 8-hydroxy-guanine formation), and apoptosis in the ipsilateral cortex after CI/R injury. Dimemorfan treatment at the time of reperfusion, although did not prevent an early rise of glutamate level, significantly prevented subsequent glutamate accumulation after reperfusion. This inhibitory effect was lasted for more than 4 h and was reversed by pre-treatment with BD1047. These results suggest that dimemorfan activates the sigma(1) receptor to reduce glutamate accumulation and then suppresses initiation of inflammation-related events and signals as well as induction of oxidative and nitrosative stresses, leading to reductions in tissue damage and cell death. In conclusion, our results demonstrate for the first time that dimemorfan exhibits protective effects against ischemic stroke in CI/R rats probably through modulation of sigma(1) receptor-dependent signals to prevent subsequent glutamate accumulation and its downstream pathologic events.
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Affiliation(s)
- Yuh-Chiang Shen
- National Research Institute of Chinese Medicine, Taipei, Taiwan
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Shen CC, Wang YH, Chang TT, Lin LC, Don MJ, Hou YC, Liou KT, Chang S, Wang WY, Ko HC, Shen YC. Anti-inflammatory ergostanes from the basidiomata of Antrodia salmonea. Planta Med 2007; 73:1208-13. [PMID: 17764065 DOI: 10.1055/s-2007-981591] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Three new anti-oxidative ergostanes, methyl antcinate L (1), antcin M (2), and methyl antcinate K (3), together with nine additional known compounds, 3-ketodehydrosulphurenic acid, sulphurenic acid, dehydrosulphurenic acid, 3beta,15alpha-dihydroxylanosta-7,9(11),24-trien-21-oic acid, zhankuic acid A, zhankuic acid B, zhankuic acid C, antcin C, and antcin K were isolated from the basidiomata of Antrodia salmonea, a newly identified species of Antrodia (Polyporaceae) in Taiwan. These three new compounds were identified as methyl 3alpha,7alpha,12alpha-trihydroxy-4alpha-methylergosta-8,24(29)-dien-11-on-26-oate (1), 3alpha,12alpha-dihydroxy-4alpha-methylergosta-8,24(29)-dien-11-on-26-oic acid (2), and methyl 3alpha,4beta,7beta-trihydroxy-4alpha-methylergosta-8,24(29)-dien-11-on-26-oate (3) by spectroscopic analysis. We studied their antioxidative potential on the production of reactive oxygen species and nitric oxide (NO) in neutrophils and microglial cells, respectively. Compounds 1-3 displayed potent antioxidative activity with IC50 values of around 2.0-8.8 microM that was partially due to inhibition (6-67%) of NADPH oxidase activity but not through direct radical-scavenging properties. Compounds 1-3 also inhibited NO production with IC50 values of around 1.7-16.5 microM and were more potent than a non-specific NOS inhibitor. We conclude that these three new compounds 1, 2, and 3 exhibit anti-inflammatory activities in activated inflammatory cells.
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Ko HC, Wang YH, Liou KT, Chen CM, Chen CH, Wang WY, Chang S, Hou YC, Chen KT, Chen CF, Shen YC. Anti-inflammatory effects and mechanisms of the ethanol extract of Evodia rutaecarpa and its bioactive components on neutrophils and microglial cells. Eur J Pharmacol 2006; 555:211-7. [PMID: 17109845 DOI: 10.1016/j.ejphar.2006.10.002] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2006] [Revised: 10/03/2006] [Accepted: 10/06/2006] [Indexed: 11/24/2022]
Abstract
Evodia rutaecarpa is commonly used as an anti-inflammatory drug in traditional Chinese medicine. We previously identified four bioactive compounds (dehydroevodiamine (I), evodiamine (II), rutaecarpine (III), and synephrine (IV)) from the ethanol extract of E. rutaecarpa, but their effects and mechanism(s) of action remain unclear. To study the anti-inflammatory potential and the possible underlying mechanism(s), their effects on phorbol-12-myristate-13-acetate (PMA)- and N-formyl-methionyl-leucyl-phenylalanine (fMLP)-induced reactive oxygen species production in neutrophils was studied, as well as lipopolysaccharide (LPS)-induced nitric oxide (NO) production and inducible NO synthetase (iNOS) expression in microglial cells. The ethanol extract of E. rutaecarpa displayed potent antioxidative effects against both PMA- and fMLP-induced reactive oxygen species production in neutrophils (with IC50 values of around 2.7-3.3 microg/ml). Although less potent than the ethanol extract of E. rutaecarpa, compounds I-IV all concentration-dependently inhibited PMA- and fMLP-induced reactive oxygen species production, with compound IV consistently being the most potent agent among these active components. The antioxidative effects of the ethanol extract of E. rutaecarpa and these compounds were partially due to inhibition (10%-33%) of NADPH oxidase activity, a predominant reactive oxygen species-producing enzyme in neutrophils, and to a minor extent to their direct radical-scavenging properties. The ethanol extract of E. rutaecarpa also inhibited LPS-induced NO production (with an IC50 of around 0.8 microg/ml) and iNOS upregulation in microglial cells that was partially mimicked by compounds I, II, and III, but not compound IV. Our results suggest that the ethanol extract of E. rutaecarpa and its four bioactive components all exhibited anti-inflammatory activities which could be partially explained by their different potentials for inhibiting NADPH oxidase-dependent reactive oxygen species and/or iNOS-dependent NO production in activated inflammatory cells.
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Affiliation(s)
- Han-Chieh Ko
- National Research Institute of Chinese Medicine, Taiwan
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Shen CC, Shen YC, Wang YH, Lin LC, Don MJ, Liou KT, Wang WY, Hou YC, Chang TT. New lanostanes and naphthoquinones isolated from Antrodia salmonea and their antioxidative burst activity in human leukocytes. Planta Med 2006; 72:199-203. [PMID: 16534722 DOI: 10.1055/s-2005-916175] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Four new compounds were isolated from the basidiomata of the fungus Antrodia salmonea, a newly identified species of Antrodia (Aphyllophorales) in Taiwan. These new compounds are named as lanosta-8,24-diene-3beta,15alpha,21-triol (1), 24-methylenelanost-8-ene-3beta,15alpha,21-triol (2), 2,3-dimethoxy-5-(2',5'-dimethoxy-3',4'-methylenedioxyphenyl)-7-methyl-[1,4]-naphthoquinone (3), and 2,3-dimethoxy-6-(2',5'-dimethoxy-3',4'-methylenedioxyphenyl)-7-methyl-[1,4]-naphthoquinone (4), respectively. Their structures were elucidated by spectroscopic methods. An in vitro cellular functional assay was performed to evaluate their anti-oxidative burst activity in human leukocytes. They showed inhibitory effects against phorbol 12-myristate-13-acetate (PMA), a direct protein kinase C activator, induced oxidative burst in neutrophils (PMN) and mononuclear cells (MNC) with 50 % inhibitory concentration (IC(50)) ranging from 3.5 to 25.8 microM. The potency order of these compounds in PMA-activated leukocytes was as 1 > 3 > 4 > 2. They were relatively less effective in formyl-Met-Leu-Phe (fMLP), a G-protein coupled receptor agonist, induced oxidative burst, except for compounds 3 and 4 in fMLP-activated PMN. These results indicated that three (1, 3, and 4) of these four newly identified compounds displayed anti-oxidative effect in human leukocytes with different potency and might confer anti-inflammatory activity to these drugs.
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Wang YH, Wang WY, Chang CC, Liou KT, Sung YJ, Liao JF, Chen CF, Chang S, Hou YC, Chou YC, Shen YC. Taxifolin ameliorates cerebral ischemia-reperfusion injury in rats through its anti-oxidative effect and modulation of NF-kappa B activation. J Biomed Sci 2005; 13:127-41. [PMID: 16283433 DOI: 10.1007/s11373-005-9031-0] [Citation(s) in RCA: 131] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2005] [Accepted: 09/08/2005] [Indexed: 12/17/2022] Open
Abstract
Infarction in adult rat brain was induced by middle cerebral arterial occlusion (MCAO) followed by reperfusion to examine whether taxifolin could reduce cerebral ischemic reperfusion (CI/R) injury. Taxifolin administration (0.1 and 1.0 microg/kg, i.v.) 60 min after MCAO ameliorated infarction (by 42%+/-7% and 62%+/-6%, respectively), which was accompanied by a dramatic reduction in malondialdehyde and nitrotyrosine adduct formation, two markers for oxidative tissue damage. Overproduction of reactive oxygen species (ROS) and nitric oxide (NO) via oxidative enzymes (e.g., COX-2 and iNOS) was responsible for this oxidative damage. Taxifolin inhibited leukocyte infiltration, and COX-2 and iNOS expressions in CI/R-injured brain. Taxifolin also prevented Mac-1 and ICAM-1 expression, two key counter-receptors involved in firm adhesion/transmigration of leukocytes to the endothelium, which partially accounted for the limited leukocyte infiltration. ROS, generated by leukocytes and microglial cells, activated nuclear factor-kappa B (NF-kappaB) that in turn signaled up-regulation of inflammatory proteins. NF-kappaB activity in CI/R was enhanced 2.5-fold over that of sham group and was inhibited by taxifolin. Production of both ROS and NO by leukocytes and microglial cells was significantly antagonized by taxifolin. These data suggest that amelioration of CI/R injury by taxifolin may be attributed to its anti-oxidative effect, which in turn modulates NF-kappaB activation that mediates CI/R injury.
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Affiliation(s)
- Yea-Hwey Wang
- Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan
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Wang YH, Wang WY, Liao JF, Chen CF, Hou YC, Liou KT, Chou YC, Tien JH, Shen YC. Prevention of macrophage adhesion molecule-1 (Mac-1)-dependent neutrophil firm adhesion by taxifolin through impairment of protein kinase-dependent NADPH oxidase activation and antagonism of G protein-mediated calcium influx. Biochem Pharmacol 2004; 67:2251-62. [PMID: 15163556 DOI: 10.1016/j.bcp.2004.02.020] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2003] [Accepted: 02/10/2004] [Indexed: 11/24/2022]
Abstract
Taxifolin has been reported to down-regulate the expression of intercellular adhesion molecule-1 (ICAM-1), a receptor-mediating firm adhesion with beta2 integrin (e.g., Mac-1) expressed on leukocytes. To evaluate whether taxifolin could modulate Mac-1-dependent firm adhesion by neutrophils, and the possible mechanism(s) underlying its anti-inflammatory action, its effects on N-formyl-methionyl-leucyl-phenylalanine (fMLP) or phorbol-12-myristate-13-acetate (PMA)-activated peripheral human neutrophils were studied. Pretreatment with taxifolin (1-100 microM) concentration-dependently diminished fMLP- or (PMA)-induced Mac-1-dependent firm adhesion and upexpression of surface Mac-1. Mobilisation of intracellular calcium and production of reactive oxygen species (ROS) signal the upexpression of Mac-1 and firm adhesion by neutrophils. Taxifolin impeded the calcium influx induced by fMLP (a receptor-mediated activator) or AlF(4)(-) (a G protein-mediated activator). Taxifolin also effectively inhibited the fMLP- or PMA-induced ROS production with 50% inhibitory concentration (IC(50)) less than 10microM, possibly through impairing the activation of NADPH oxidase, a major ROS-generating enzyme in neutrophils, by restricting the activation of p38 mitogen-activated protein kinase (p38 MAPK) and protein kinase C (PKC). In conclusion, we propose that impairment of ROS production by NADPH oxidase through interfering with p38 MAPK- and/or PKC-dependent signals, and antagonism of G protein-mediated calcium influx may account for the inhibition of Mac-1-dependent neutrophil firm adhesion that confers taxifolin the anti-inflammatory activity.
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Affiliation(s)
- Yea-Hwey Wang
- Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
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Liou KT, Shen YC, Chen CF, Tsao CM, Tsai SK. Honokiol protects rat brain from focal cerebral ischemia–reperfusion injury by inhibiting neutrophil infiltration and reactive oxygen species production. Brain Res 2003; 992:159-66. [PMID: 14625055 DOI: 10.1016/j.brainres.2003.08.026] [Citation(s) in RCA: 122] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We have previously shown that honokiol, an active component of Magnolia officinalis, displayed protective effect against focal cerebral ischemia-reperfusion (FCI/R) injury in rats. Production of reactive oxygen species (ROS) and infiltration of neutrophils to injured tissue play deleterious roles during cerebral ischemia. To study the mechanism(s) in mediating neuroprotective effect of honokiol, FCI/R-induced neutrophil infiltration and lipid peroxidation in brain tissue, and activation of neutrophils in-vitro were examined. Intravenous administration of honokiol (0.01-1.0 microg/kg) 15 min before (pretreatment) or 60 min after (post-treatment) middle cerebral artery occlusion reduced the total infarcted volume by 20-70% in dose-dependent manner. Pretreatment or post-treatment of honokiol at concentration of 0.1 and 1.0 microg/kg significantly decreased the neutrophil infiltration in the infarcted brain. Time course of neutrophil infiltration was performed in parallel with the lipid peroxidation in infracted brain tissue during FCI/R injury. The results indicate that honokiol can protect brain tissue against lipid peroxidation and neutrophil infiltration during FCI/R injury and cerebral infarction induced by FCI/R is accompanied with a prominent neutrophil infiltration to the infarcted area during FCI/R course. In-vitro, honokiol (0.1-10 microM) significantly diminished fMLP (N-formyl-methionyl-leucyl-phenylalanine)- or PMA (phorbol-12-myristate-13-acetate)-induced neutrophil firm adhesion, a prerequisite step behind neutrophil infiltration, and ROS production in neutrophils. Intracellular calcium overloading activates calcium-stimulated enzymes and further exaggerates FCI/R injury. Honokiol (0.1-10 microM) impeded the calcium influx induced by fMLP (a receptor agonist), AlF(4)(-) (a G-protein activator) or thapsigargin (an intracellular calcium pool releaser). Therefore, we conclude that the amelioration of FCI/R injury by honokiol can be attributed to its anti-oxidative and anti-inflammatory actions through, at least in part, limiting lipid peroxidation and reducing neutrophil activation/infiltration by interfering firm adhesion, ROS production, and calcium overloading that may be primed/activated during FCI/R injury.
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Affiliation(s)
- Kuo-Tong Liou
- Institute of Clinical Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
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Liou KT, Shen YC, Chen CF, Tsao CM, Tsai SK. The anti-inflammatory effect of honokiol on neutrophils: mechanisms in the inhibition of reactive oxygen species production. Eur J Pharmacol 2003; 475:19-27. [PMID: 12954355 DOI: 10.1016/s0014-2999(03)02121-6] [Citation(s) in RCA: 141] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Reactive oxygen species produced by neutrophils contribute to the pathogenesis of focal cerebral ischemia/reperfusion injury and signal the inflammatory response. We have previously shown that honokiol, an active principle extracted from Magnolia officinalis, has a protective effect against focal cerebral ischemia/reperfusion injury in rats that paralleled a reduction in reactive oxygen species production by neutrophils. To elucidate the underlying mechanism(s) of the antioxidative effect of honokiol, peripheral neutrophils isolated from rats were activated with phorbol-12-myristate-13-acetate (PMA) or N-formyl-methionyl-leucyl-phenylalanine (fMLP) in the presence or absence of honokiol. In this study, we found that honokiol inhibited PMA- or fMLP-induced reactive oxygen species production by neutrophils by three distinct mechanisms: (1) honokiol diminished the activity of assembled-NADPH oxidase, a major reactive oxygen species producing enzyme in neutrophils by 40% without interfering with its protein kinase C (PKC)-dependent assembly; (2) two other important enzymes for reactive oxygen species generation in neutrophils, i.e., myeloperoxidase and cyclooxygenase, were also inhibited by honokiol by 20% and 70%, respectively; and (3) honokiol enhanced glutathione (GSH) peroxidase activity by 30%, an enzyme that triggers the metabolism of hydrogen peroxide (H2O2). These data suggested that honokiol, acting as a potent reactive oxygen species inhibitor/scavenger, could achieve its focal cerebral ischemia/reperfusion injury protective effect by modulating enzyme systems related to reactive oxygen species production or metabolism, including NADPH oxidase, myeloperoxidase, cyclooxygenase, and GSH peroxidase in neutrophils.
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Affiliation(s)
- Kuo-Tong Liou
- Institute of Clinical Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan
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Abstract
Honokiol, a constituent extracted from Magnolia officinalis, had been shown be an antioxidant and an anti-platelet agent in biological systems with an anti-arrhythmic effect and a myocardial protective effect on ischemia-reperfusion injury. We examined the neuroprotective effect of honokiol in rats subjected to focal cerebral ischemia. Honokiol was administered intravenously either at fifteen minutes before right middle cerebral artery occlusion (pretreatment groups) or when both common carotid arteries clips were removed (treatment groups). The results showed that there was no significant hemodynamic change after intravenous infusion of honokiol at the dosages of 10(-8), 10(-7) and 10(-6) g/kg in both groups. However, honokiol significantly reduced the total volume of infarction at the doses of 10(-7) or 10(-6) g/kg in both pretreatment and treatment groups. This study suggests that honokiol is a potent neuroprotective agent in focal cerebral ischemia. This beneficial effect may be related to its antioxidant effect and anti-platelet aggregation activity.
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Affiliation(s)
- Kuo-Tong Liou
- Institute of Clinical Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan, ROC
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Liou KT. Employee job stress in the AIDS service organization: a study of personal and job factors. J Health Hum Serv Adm 1998; 20:242-53. [PMID: 10177081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
This study examined employees' perceived job stress in a community-based AIDS service organization. The study reveals that: 1) these employees have a relatively low level of job stress and 2) their perceived job stress is correlated not to personal characteristics but to job-related factors, including job security, work/family conflict, and role ambiguity/conflict. Implications concerning the results of the study are discussed.
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Affiliation(s)
- K T Liou
- University of Central Florida, USA
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Liou KT. An analysis of employees' job involvement in a community-based AIDS service organization. J Health Hum Serv Adm 1997; 19:304-18. [PMID: 10168170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
This study analyzes employees' job involvement in a community-based AIDS Service Organization (ASO). The study reveals that these employees have a relatively high level of job involvement and that three job-related factors are significantly correlated to the job involvement. The three factors are: employees' perceived job security, attitude toward their organization, and the conflict between job and family. The study further explains the importance of these findings to the management of ASOs.
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Affiliation(s)
- K T Liou
- University of Central Florida, USA
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Liou KT. Issues in AIDS services delivery: a symposium. Introduction. J Health Hum Serv Adm 1997; 19:235-9. [PMID: 10168165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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Abstract
This study surveyed employees of the Comprehensive AIDS Program of Palm Beach County, Florida, a community-based AIDS service organization, to understand employees' motives for working for the organization and their attitudes toward their jobs, the organization, its clients (persons with AIDS), and governments. The study revealed that the primary reasons employees work for the organization are a desire for personal involvement in the AIDS fight and the personal lifestyle and/or feeling of each employee. These employees were highly motivated, showing some very positive attitudes toward their jobs, organization, and clients. On the other side, these employees reported concern for future funding of their organization and unhappiness with both federal and state governments' role in the fight against AIDS. Based on these findings, the authors discuss implications for the management of AIDS service organizations, the quality of the AIDS service delivery system, and the future development of AIDS service organizations.
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Affiliation(s)
- K T Liou
- School of Public Administration, Florida Atlantic University, Fort Lauderdale 33301
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Cruise PL, Liou KT. AIDS case management: a study of an innovative health services program in Palm Beach County, Florida. J Health Hum Resour Adm 1994; 16:96-110. [PMID: 10129848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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