1
|
Lu SY, Wang HM, Feng N, Ma AJ. Total synthesis of bi-magnolignan. RSC Adv 2023; 13:8844-8846. [PMID: 36936845 PMCID: PMC10018648 DOI: 10.1039/d3ra01121f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Accepted: 03/09/2023] [Indexed: 03/18/2023] Open
Abstract
Bi-magnolignan, isolated from the leaves of Magnolia officinalis, has shown excellent physiological activity against tumor cells. An efficient strategy for the first total synthesis of bi-magnolignan is reported. The bi-dibenzofuran skeleton was constructed via functional group interconversions of commercially available materials 1,2,4-trimethoxybenzene and 4-allylanisole. Then, the dibenzofuran skeleton was afforded by subsequent Suzuki coupling and intramolecular dehydration. The total synthesis of natural product was accomplished through FeCl3 catalyzed oxidative coupling.
Collapse
Affiliation(s)
- Si-Yuan Lu
- School of Biotechnology and Health Sciences, Wuyi University Jiangmen Guangdong 529020 People's Republic of China
| | - Hong-Mei Wang
- School of Biotechnology and Health Sciences, Wuyi University Jiangmen Guangdong 529020 People's Republic of China
| | - Na Feng
- School of Biotechnology and Health Sciences, Wuyi University Jiangmen Guangdong 529020 People's Republic of China
| | - Ai-Jun Ma
- School of Biotechnology and Health Sciences, Wuyi University Jiangmen Guangdong 529020 People's Republic of China
| |
Collapse
|
2
|
Soltani D, Azizi B, Rahimi R, Talasaz AH, Rezaeizadeh H, Vasheghani-Farahani A. Mechanism-based targeting of cardiac arrhythmias by phytochemicals and medicinal herbs: A comprehensive review of preclinical and clinical evidence. Front Cardiovasc Med 2022; 9:990063. [PMID: 36247473 PMCID: PMC9559844 DOI: 10.3389/fcvm.2022.990063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 09/14/2022] [Indexed: 11/13/2022] Open
Abstract
Cardiac arrhythmias, characterized by an irregular heartbeat, are associated with high mortality and morbidity. Because of the narrow therapeutic window of antiarrhythmic drugs (AADs), the management of arrhythmia is still challenging. Therefore, searching for new safe, and effective therapeutic options is unavoidable. In this study, the antiarrhythmic effects of medicinal plants and their active constituents were systematically reviewed to introduce some possible candidates for mechanism-based targeting of cardiac arrhythmias. PubMed, Embase, and Cochrane library were searched from inception to June 2021 to find the plant extracts, phytochemicals, and multi-component herbal preparations with antiarrhythmic activities. From 7337 identified results, 57 original studies consisting of 49 preclinical and eight clinical studies were finally included. Three plant extracts, eight multi-component herbal preparations, and 26 phytochemicals were found to have antiarrhythmic effects mostly mediated by affecting K+ channels, followed by modulating Ca2+ channels, upstream target pathways, Nav channels, gap junction channels, and autonomic receptors. The most investigated medicinal plants were Rhodiola crenulata and Vitis vinifera. Resveratrol, Oxymatrine, and Curcumin were the most studied phytochemicals found to have multiple mechanisms of antiarrhythmic action. This review emphasized the importance of research on the cardioprotective effect of medicinal plants and their bioactive compounds to guide the future development of new AADs. The most prevalent limitation of the studies was their unqualified methodology. Thus, future well-designed experimental and clinical studies are necessary to provide more reliable evidence.
Collapse
Affiliation(s)
- Danesh Soltani
- Cardiac Primary Prevention Research Center (CPPRC), Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Bayan Azizi
- Cardiac Primary Prevention Research Center (CPPRC), Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Roja Rahimi
- Department of Traditional Pharmacy, School of Persian Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Evidence-Based Evaluation of Cost-Effectiveness and Clinical Outcomes, The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
- *Correspondence: Roja Rahimi,
| | - Azita H. Talasaz
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
- Department of Pharmacotherapy and Outcomes Science, Virginia Commonwealth University, Richmond, VA, United States
| | - Hossein Rezaeizadeh
- Department of Persian Medicine, School of Traditional Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Vasheghani-Farahani
- Cardiac Primary Prevention Research Center (CPPRC), Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
- Ali Vasheghani-Farahani,
| |
Collapse
|
3
|
Santos J, Quimque MT, Liman RA, Agbay JC, Macabeo APG, Corpuz MJA, Wang YM, Lu TT, Lin CH, Villaflores OB. Computational and Experimental Assessments of Magnolol as a Neuroprotective Agent and Utilization of UiO-66(Zr) as Its Drug Delivery System. ACS OMEGA 2021; 6:24382-24396. [PMID: 34604621 PMCID: PMC8482410 DOI: 10.1021/acsomega.1c02555] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Indexed: 05/26/2023]
Abstract
The phenolic natural product magnolol exhibits neuroprotective properties through β-amyloid toxicity in PC-12 cells and ameliorative effects against cognitive deficits in a TgCRND8 transgenic mice model. Its bioavailability and blood-brain barrier crossing ability have been significantly improved using the metal-organic framework (MOF) UiO-66(Zr) as a drug delivery system (DDS). To investigate the neuroprotective effects of the Zr-based DDS, magnolol and magnolol-loaded-UiO-66(Zr) (Mag@UiO-66(Zr)) were evaluated for inhibitory activity against β-secretase and AlCl3-induced neurotoxicity. Due to the moderate inhibition observed for magnolol in vitro, in silico binding studies were explored against β-secretase along with 11 enzymes known to affect Alzheimer's disease (AD). Favorable binding energies against CDK2, CKD5, MARK, and phosphodiesterase 3B (PDE3B) and dynamically stable complexes were noted through molecular docking and molecular dynamic simulation experiments, respectively. The magnolol-loaded DDS UiO-66(Zr) also showed enhanced neuroprotective activity against two pathological indices, namely, neutrophil infiltration and apoptotic neurons, in addition to damage reversal compared to magnolol. Thus, MOFs are promising drug delivery platforms for poorly bioavailable drugs.
Collapse
Affiliation(s)
- Joshua Santos
- The
Graduate School, University of Santo Tomas, España Blvd., 1015 Manila, Philippines
- Phytochemistry
Laboratory, Research Center for the Natural and Applied Sciences, University of Santo Tomas, España Blvd., 1015 Manila, Philippines
| | - Mark Tristan Quimque
- The
Graduate School, University of Santo Tomas, España Blvd., 1015 Manila, Philippines
- Laboratory
of Organic Reactivity, Discovery, and Synthesis (LORDS), Research
Center for Natural and Applied Sciences, University of Santo Tomas, España Blvd., 1015 Manila, Philippines
- Department
of Chemistry, College of Science and Mathematics, Mindanao State University-Iligan Institute of Technology, Tibanga, 9200 Iligan City, Philippines
| | - Rhenz Alfred Liman
- The
Graduate School, University of Santo Tomas, España Blvd., 1015 Manila, Philippines
- Phytochemistry
Laboratory, Research Center for the Natural and Applied Sciences, University of Santo Tomas, España Blvd., 1015 Manila, Philippines
| | - Jay Carl Agbay
- Department
of Chemistry, College of Science and Mathematics, Mindanao State University-Iligan Institute of Technology, Tibanga, 9200 Iligan City, Philippines
- Philippine
Science High School-Central Mindanao Campus, 9217 Balo-i, Lanao del Norte, Philippines
| | - Allan Patrick G. Macabeo
- Laboratory
of Organic Reactivity, Discovery, and Synthesis (LORDS), Research
Center for Natural and Applied Sciences, University of Santo Tomas, España Blvd., 1015 Manila, Philippines
| | - Mary Jho-Anne Corpuz
- The
Graduate School, University of Santo Tomas, España Blvd., 1015 Manila, Philippines
- Pharmacology
Laboratory, Research Center for the Natural and Applied Sciences, University of Santo Tomas, España Blvd., 1015 Manila, Philippines
- Department
of Pharmacy, Faculty of Pharmacy, University
of Santo Tomas, España
Blvd., 1015 Manila, Philippines
| | - Yun-Ming Wang
- Department
of Biological Science and Technology, Institute of Molecular Medicine
and Bioengineering, Center for Intelligent Drug Systems and Smart
Bio-devices (IDS2B), National Chiao Tung
University, 30010 Hsinchu, Taiwan
| | - Tsai-Te Lu
- Institute
of Biomedical Engineering, National Tsing
Hua University, 30013 Hsinchu, Taiwan
| | - Chia-Her Lin
- College
of Science, Chung Yuan Christian University, Zhongli District, 320 Taoyuan City, Taiwan
| | - Oliver B. Villaflores
- The
Graduate School, University of Santo Tomas, España Blvd., 1015 Manila, Philippines
- Phytochemistry
Laboratory, Research Center for the Natural and Applied Sciences, University of Santo Tomas, España Blvd., 1015 Manila, Philippines
- Department of Biochemistry, Faculty of Pharmacy, University of Santo Tomas, España Blvd., 1015 Manila, Philippines
| |
Collapse
|
4
|
Yuan Y, Zhou X, Wang Y, Wang Y, Teng X, Wang S. Cardiovascular Modulating Effects of Magnolol and Honokiol, Two Polyphenolic Compounds from Traditional Chinese Medicine-Magnolia Officinalis. Curr Drug Targets 2020; 21:559-572. [PMID: 31749425 DOI: 10.2174/1389450120666191024175727] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 09/30/2019] [Accepted: 10/14/2019] [Indexed: 01/09/2023]
Abstract
Honokiol and its isomer magnolol are poly-phenolic compounds isolated from the Magnolia officinalis that exert cardiovascular modulating effects via a variety of mechanisms. They are used as blood-quickening and stasis-dispelling agents in Traditional Chinese Medicine and confirmed to have therapeutic potential in atherosclerosis, thrombosis, hypertension, and cardiac hypertrophy. This comprehensive review summarizes the current data regarding the cardioprotective mechanisms of those compounds and identifies areas for further research.
Collapse
Affiliation(s)
- Yuan Yuan
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Xiaocui Zhou
- China Animal Health and Epidemiology Center, Qingdao 266032, China
| | - Yuanyuan Wang
- China Animal Health and Epidemiology Center, Qingdao 266032, China
| | - Yan Wang
- China Animal Health and Epidemiology Center, Qingdao 266032, China
| | - Xiangyan Teng
- China Animal Health and Epidemiology Center, Qingdao 266032, China
| | - Shuaiyu Wang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| |
Collapse
|
5
|
Luo H, Wu H, Yu X, Zhang X, Lu Y, Fan J, Tang L, Wang Z. A review of the phytochemistry and pharmacological activities of Magnoliae officinalis cortex. JOURNAL OF ETHNOPHARMACOLOGY 2019; 236:412-442. [PMID: 30818008 DOI: 10.1016/j.jep.2019.02.041] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 02/22/2019] [Accepted: 02/23/2019] [Indexed: 05/18/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Magnoliae Officinalis Cortex (the dried bark of Magnolia officinalis), a widely used traditional Chinese medicine, is also known as 'Houpo' (Chinese: ). Magnoliae Officinalis Cortex has a wide range of pharmacological effects and has been used to treat conditions such as abdominal distention, vomiting, diarrhea, food accumulation, Qi stagnation, constipation, phlegm and fluid retention and cough resulting from asthma. AIMS OF THE REVIEW The present paper reviews advances in research relating to the botany, ethnopharmacology, phytochemistry, pharmacology and toxicology of Magnoliae Officinalis Cortex. Prospects for future investigation and application of this herb are also discussed. MATERIALS AND METHODS Information on Magnoliae Officinalis Cortex was obtained from published materials, including ancient and modern books; PhD and MSc dissertations; monographs on medicinal plants; the pharmacopoeia of different countries and electronic databases, such as SCI finder, PubMed, Web of Science, ACS, Science Direct, Wiley, Springer, Taylor, AGRIS, Europe PMC, EBSCO host, CNKI, WanFang DATA, J-STAGE and Google Scholar. RESULTS More than 200 chemical compounds have been isolated from Magnoliae Officinalis Cortex, including lignans, phenylethanoid glycosides, phenolic glycosides, alkaloids, steroids and essential oils. The plant has been reported to have pharmacological effects on the digestive system, nervous system and cardiovascular and cerebrovascular systems, as well as antibacterial, anti-tumour, analgesic, anti-inflammatory and anti-oxidative effects. CONCLUSIONS Magnoliae Officinalis Cortex is an essential traditional Chinese medicine with pharmacological activities that mainly affect the digestive system, nervous system and cardiovascular and cerebrovascular systems. This review summarises its botany, ethnopharmacology, phytochemistry, pharmacology and toxicology. These information suggest that we should focus on the development of new drugs related to Magnoliae Officinalis Cortex, including specific constituents, so that Magnoliae Officinalis Cortex can exert greater therapeutic potential. Meanwhile, it is important to pay attention to the rational use of Magnolia resources, avoiding over-harvesting which could lead to lack of resources. We should also pursue research on Magnolia substitutes and develop resources such as Magnoliae Officinalis Flos and Magnolia Leaf.
Collapse
Affiliation(s)
- Hanyan Luo
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Science, Beijing 100700, China
| | - Hongwei Wu
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Science, Beijing 100700, China
| | - Xiankuo Yu
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Science, Beijing 100700, China
| | - Xiao Zhang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Science, Beijing 100700, China
| | - Yaqi Lu
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Science, Beijing 100700, China
| | - Jianwei Fan
- State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Shandong 276006, China
| | - Liying Tang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Science, Beijing 100700, China.
| | - Zhuju Wang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Science, Beijing 100700, China.
| |
Collapse
|
6
|
Liu Z, Xie J, Lin K, Qi L. Influencing mechanism of magnolol on expression of BDNF and Bax in rats with cerebral ischemic stroke. Exp Ther Med 2018; 16:4423-4428. [PMID: 30542392 PMCID: PMC6257771 DOI: 10.3892/etm.2018.6807] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 07/26/2018] [Indexed: 11/06/2022] Open
Abstract
The impact of magnolol on cerebral ischemic stroke in rats and the molecular mechanism were explored. Sprague-Dawley rat models were studied. Cerebral indexes, hematoxylin and eosin staining, TUNEL staining assay, reverse transcription-polymerase chain reaction (RT-PCR) and western blotting were applied. The cerebral index in model group was significantly higher than that in sham operation group, and the cerebral index was obviously decreased after magnolol administration. Inflammatory cells accumulated in the brain tissue of rats in the model group. Abundant apoptotic cells were produced in the model group, which was overtly improved after rats were given magnolol. RT-PCR and western blot analysis showed that expression of mRNA and protein of brain-derived neurotrophic factor (BDNF) were distinctly decreased in model group, and increased after rats were given magnolol; while mRNA and protein expression of Bcl-2-associated X protein (Bax) were significantly raised in model group, and reduced after rats were given magnolol. The results showed that there were statistically significant differences in expression of BDNF and Bax among sham operation, model and magnolol administration groups (p<0.01). In conclusion, magnolol can increase the expression of BDNF and decrease the expression of Bax, thereby inhibiting apoptosis to protect the nerves, and magnolol can improve cerebral ischemic stroke in rats.
Collapse
Affiliation(s)
- Zhenbo Liu
- The Second Department of Neurosurgery, Xingtai People's Hospital, Xingtai, Hebei 054031, P.R. China
| | - Jun Xie
- Department of Neurosurgery, Tongchuan People's Hospital, Tongchuan, Shaanxi 727000, P.R. China
| | - Kai Lin
- Department of Neurosurgery, Liaocheng People's Hospital, Liaocheng, Shandong 252004, P.R. China
| | - Liguo Qi
- Department of Neurosurgery, Taian City Central Hospital, Taian, Shandong 271000, P.R. China
| |
Collapse
|
7
|
Morshedloo MR, Quassinti L, Bramucci M, Lupidi G, Maggi F. Chemical composition, antioxidant activity and cytotoxicity on tumour cells of the essential oil from flowers of Magnolia grandiflora cultivated in Iran. Nat Prod Res 2017; 31:2857-2864. [PMID: 28299950 DOI: 10.1080/14786419.2017.1303699] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Magnolia grandiflora (Magnoliaceae) is an evergreen tree with fragrant and showy flowers native to southeastern USA but widely cultivated all over the world and used in cosmetics industry in treatment of skin diseases. Here, we report on the chemical analysis of the essential oil obtained from flowers of plants cultivated in Iran, together with the evaluation of its antioxidant and cytotoxic activities. The essential oil composition was dominated by bioactive sesquiterpenes, namely β-elemene, bicyclogermacrene, germacrene D and (E)-caryophyllene. The oil exhibited moderate radical scavenging activity towards the [Formula: see text] radical, and mild non-selective inhibitory effects against A375, MDA-MB 231 and T98 G tumour cell lines. The latter were influenced by the presence of the anticancer β-elemene. These results provided new insights for potential application of M. grandiflora volatile oil in the pharmaceutical and cosmetics industry where only the non-volatile magnolol and honokiol have hitherto been fully exploited.
Collapse
Affiliation(s)
| | - Luana Quassinti
- b School of Pharmacy , University of Camerino , Camerino , Italy
| | - Massimo Bramucci
- b School of Pharmacy , University of Camerino , Camerino , Italy
| | - Giulio Lupidi
- b School of Pharmacy , University of Camerino , Camerino , Italy
| | - Filippo Maggi
- b School of Pharmacy , University of Camerino , Camerino , Italy
| |
Collapse
|
8
|
Schepetkin IA, Khlebnikov AI, Kirpotina LN, Quinn MT. Antagonism of human formyl peptide receptor 1 with natural compounds and their synthetic derivatives. Int Immunopharmacol 2015; 37:43-58. [PMID: 26382576 DOI: 10.1016/j.intimp.2015.08.036] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 08/25/2015] [Accepted: 08/28/2015] [Indexed: 12/18/2022]
Abstract
Formyl peptide receptor 1 (FPR1) regulates a wide variety of neutrophil functional responses and plays an important role in inflammation and the pathogenesis of various diseases. To date, a variety of natural and synthetic molecules have been identified as FPR1 ligands. Here, we review current knowledge on natural products and natural product-inspired small molecules reported to antagonize and/or inhibit the FPR1-mediated responses. Based on this literature, additional screening of selected commercially available natural compounds for their ability to inhibit fMLF-induced Ca(2+) mobilization in human neutrophils and FPR1 transfected HL-60 cells, and pharmacophore modeling, natural products with potential as FPR1 antagonists are considered and discussed in this review. The identification and characterization of natural products that antagonize FPR1 activity may have potential for the development of novel therapeutics to limit or alter the outcome of inflammatory processes.
Collapse
Affiliation(s)
- Igor A Schepetkin
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT 59717, United States
| | - Andrei I Khlebnikov
- Department of Biotechnology and Organic Chemistry, Tomsk Polytechnic University, Tomsk 634050, Russia; Department of Chemistry, Altai State Technical University, Barnaul, Russia
| | - Liliya N Kirpotina
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT 59717, United States
| | - Mark T Quinn
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT 59717, United States.
| |
Collapse
|
9
|
Liang X, Xing W, He J, Fu F, Zhang W, Su F, Liu F, Ji L, Gao F, Su H, Sun X, Zhang H. Magnolol administration in normotensive young spontaneously hypertensive rats postpones the development of hypertension: role of increased PPAR gamma, reduced TRB3 and resultant alleviative vascular insulin resistance. PLoS One 2015; 10:e0120366. [PMID: 25793876 PMCID: PMC4367990 DOI: 10.1371/journal.pone.0120366] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 01/20/2015] [Indexed: 01/04/2023] Open
Abstract
Patients with prehypertension are more likely to progress to manifest hypertension than those with optimal or normal blood pressure. However, the mechanisms underlying the development from prehypertension to hypertension still remain largely elusive and the drugs for antihypertensive treatment in prehypertension are absent. Here we determined the effects of magnolol (MAG) on blood pressure and aortic vasodilatation to insulin, and investigated the underlying mechanisms. Four-week-old male spontaneous hypertensive rats (SHR) and age-matched normotensive Wistar-Kyoto (WKY) control rats were used. Our results shown that treatment of young SHRs with MAG (100 mg/kg/day, o.g.) for 3 weeks decreased blood pressure, improved insulin-induced aorta vasodilation, restored Akt and eNOS activation stimulated by insulin, and increased PPARγ and decreased TRB3 expressions. In cultured human umbilical vein endothelial cells (HUVECs), MAG incubation increased PPARγ, decreased TRB3 expressions, and restored insulin-induced phosphorylated Akt and eNOS levels and NO production, which was blocked by both PPARγ antagonist and siRNA targeting PPARγ. Improved insulin signaling in HUVECs by MAG was abolished by upregulating TRB3 expression. In conclusion, treatment of young SHRs with MAG beginning at the prehypertensive stage decreases blood pressure via improving vascular insulin resistance that is at least partly attributable to upregulated PPARγ, downregulated TRB3 and consequently increased Akt and eNOS activations in blood vessels in SHRs.
Collapse
Affiliation(s)
- Xiangyan Liang
- Experiment Teaching Center, Fourth Military Medical University, Xi'an, China
| | - Wenjuan Xing
- Department of Physiology, Fourth Military Medical University, Xi'an, China
| | - Jinxiao He
- Department of Pediatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Feng Fu
- Department of Physiology, Fourth Military Medical University, Xi'an, China
| | - Wei Zhang
- Department of Cardiology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Feifei Su
- Department of Cardiology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Fange Liu
- Experiment Teaching Center, Fourth Military Medical University, Xi'an, China
| | - Lele Ji
- Experiment Teaching Center, Fourth Military Medical University, Xi'an, China
| | - Feng Gao
- Department of Physiology, Fourth Military Medical University, Xi'an, China
| | - Hui Su
- Department of Geratology, Xijing Hospital, Fourth Military Medical University, Xi’an, China
- * E-mail: (HZ); (XS); (HS)
| | - Xin Sun
- Department of Pediatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
- * E-mail: (HZ); (XS); (HS)
| | - Haifeng Zhang
- Experiment Teaching Center, Fourth Military Medical University, Xi'an, China
- * E-mail: (HZ); (XS); (HS)
| |
Collapse
|
10
|
Effects and mechanisms of chinese herbal medicine in ameliorating myocardial ischemia-reperfusion injury. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:925625. [PMID: 24288571 PMCID: PMC3833114 DOI: 10.1155/2013/925625] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Revised: 08/26/2013] [Accepted: 09/04/2013] [Indexed: 02/08/2023]
Abstract
Myocardial ischemia-reperfusion (MIR) injury is a major contributor to the morbidity and mortality associated with coronary artery disease, which accounts for approximately 450,000 deaths a year in the United States alone. Chinese herbal medicine, especially combined herbal formulations, has been widely used in traditional Chinese medicine for the treatment of myocardial infarction for hundreds of years. While the efficacy of Chinese herbal medicine is well documented, the underlying molecular mechanisms remain elusive. In this review, we highlight recent studies which are focused on elucidating the cellular and molecular mechanisms using extracted compounds, single herbs, or herbal formulations in experimental settings. These studies represent recent efforts to bridge the gap between the enigma of ancient Chinese herbal medicine and the concepts of modern cell and molecular biology in the treatment of myocardial infarction.
Collapse
|
11
|
Chen CYC, Wu CH. Magnolol Encapsulated by Liposome in Inhibiting Smooth Muscle Cell Proliferation. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200800076] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
12
|
Han R, Xue J, Hua E, Zhou L. The high-performance liquid chromatographic fingerprints study of Awei capsules. Pharmacogn Mag 2013; 9:67-71. [PMID: 23661996 PMCID: PMC3647397 DOI: 10.4103/0973-1296.108143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Revised: 02/13/2012] [Accepted: 03/05/2013] [Indexed: 11/21/2022] Open
Abstract
Background: Awei Capusules are Hospital preparation for Hyperlipidemia. It was composed by Awei, Magnoliae Officinalis and Polygonum Bistoral etc. Manufacture and quality standard of Awei Capusules had been studied. Results of animal pharmacodynamic and clinical study all displayed that Awei Capusules can reduce serum levels of TC, TG, LDL-C, increases HDL-C/TC. It was safe. It could improve hemorrheology and vessel function of blood stasis animal. On the basis of these, we studied on fingerprint of Awei capsule. Materials and Methods: The gradient elution method was used for analyzing samples on HPLC. Fingerprint similarity calculation software was used for data analysis. Results: We got a good separation of Awei Capusules peaks. There were 15 peaks in fingerprint of Awei capusles. Gallic acid, magnolol and honokiol were identified. Conclusion: HPLC fingerprinting of Awei Capusules can provide to reference. It can control preparations quality of Awei Capusules.
Collapse
Affiliation(s)
- Rong Han
- The Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | | | | | | |
Collapse
|
13
|
Singh P, Singh IN, Mondal SC, Singh L, Garg VK. Platelet-activating factor (PAF)-antagonists of natural origin. Fitoterapia 2012; 84:180-201. [PMID: 23160091 DOI: 10.1016/j.fitote.2012.11.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Revised: 10/30/2012] [Accepted: 11/04/2012] [Indexed: 01/06/2023]
Abstract
Presently herbal medicines are being used by about 80% of the world population for primary health care as they stood the test of time for their safety, efficacy, cultural acceptability and lesser side effects. The discovery of platelet activating factor antagonists (PAF antagonists) during these decades are going on with different framework, but the researchers led their efficiency in studying in vitro test models. Since it is assumed that PAF play a central role in etiology of many diseases in humans such as asthma, neuronal damage, migraine, cardiac diseases, inflammatory, headache etc. Present days instinctively occurring PAF antagonist exists as a specific grade of therapeutic agents for the humans against these and different diseases either laid hold of immunological or non-immunological types. Ginkgolide, cedrol and many other natural PAF antagonists such as andrographolide, α-bulnesene, cinchonine, piperine, kadsurenone, different Piper species' natural products and marine origin plants extracts or even crude drugs having PAF antagonist properties are being used currently against different inflammatory pathologies. This review is an attempt to summarize the data on PAF and action of natural PAF antagonists on it, which were evaluated by in vivo and in vitro assays.
Collapse
Affiliation(s)
- Preeti Singh
- Department of Pharmacology, R.V.N.I. Dadri, Greater Noida, 201301, Uttar Pradesh, India.
| | | | | | | | | |
Collapse
|
14
|
Ho JHC, Hong CY. Cardiovascular protection of magnolol: cell-type specificity and dose-related effects. J Biomed Sci 2012; 19:70. [PMID: 22849814 PMCID: PMC3418199 DOI: 10.1186/1423-0127-19-70] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Accepted: 06/26/2012] [Indexed: 12/17/2022] Open
Abstract
Magnolia officinalis has been widely used in traditional Chinese medicine. Magnolol, an active component isolated from Magnolia officinalis, is known to be a cardiovascular protector since 1994. The multiplex mechanisms of magnolol on cardiovascular protection depends on cell types and dosages, and will be reviewed and discussed in this article. Magnolol under low and moderate dosage possesses the ability to protect heart from ischemic/reperfusion injury, reduces atherosclerotic change, protects endothelial cell against apoptosis and inhibits neutrophil-endothelial adhesion. The moderate to high concentration of magnolol mainly acts on smooth muscle cells and platelets. Magnolol induces apoptosis in vascular smooth muscle cells at moderate concentration and inhibits proliferation at moderate and high concentration. High concentration of magnolol also abrogates platelet activation, aggregation and thrombus formation. Magnolol also serves as an smooth muscle relaxant only upon the high concentration. Oral intake of magnolol to reach the therapeutic level for cardiovascular protection is applicable, thus makes magnolol an agent of great potential for preventing cardiovascular diseases in high-risk patients.
Collapse
Affiliation(s)
- Jennifer Hui-Chun Ho
- Graduate Institute of Clinical Medicine, Taipei Medical University, Taipei, Taiwan
| | | |
Collapse
|
15
|
Jada S, Reddy Doma M, Singh PP, Kumar S, Malik F, Sharma A, Khan IA, Qazi G, Kumar HS. Design and synthesis of novel magnolol derivatives as potential antimicrobial and antiproliferative compounds. Eur J Med Chem 2012; 51:35-41. [DOI: 10.1016/j.ejmech.2011.12.039] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 11/09/2011] [Accepted: 12/23/2011] [Indexed: 10/24/2022]
|
16
|
Rasul A, Yu B, Khan M, Zhang K, Iqbal F, Ma T, Yang H. Magnolol, a natural compound, induces apoptosis of SGC-7901 human gastric adenocarcinoma cells via the mitochondrial and PI3K/Akt signaling pathways. Int J Oncol 2011; 40:1153-61. [PMID: 22139054 PMCID: PMC3584565 DOI: 10.3892/ijo.2011.1277] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Accepted: 10/27/2011] [Indexed: 12/05/2022] Open
Abstract
Gastric cancer is the fourth most commonly diagnosed cancer with the second highest mortality rate worldwide. Surgery, chemotherapy and radiation therapy are generally used for the treatment of stomach cancer but only limited clinical response is shown by these therapies and still no effectual therapy for advanced gastric adenocarcinoma patients is available. Therefore, there is a need to identify other therapeutic agents against this life-threatening disease. Plants are considered as one of the most important sources for the development of anticancer drugs. Magnolol, a natural compound possesses anticancer properties. However, effects of Magnolol on human gastric cancer remain unexplored. The effects of Magnolol on the viability of SGC-7901 cells were determined by the MTT assay. Apoptosis, mitochondrial membrane potential and cell cycle were evaluated by flow cytometry. Protein expression of Bcl-2, Bax, caspase-3 and PI3K/Akt was analysed by Western blotting. Magnolol induced morphological changes in SGC-7901 cells and its cytotoxic effects were linked with DNA damage, apoptosis and S-phase arrest in a dose-dependent manner. Magnolol triggered the mitochondrial-mediated apoptosis pathway as shown by an increased ratio of Bax/Bcl-2, dissipation of mitochondrial membrane potential (ΔΨm), and sequential activation of caspase-3 and inhibition of PI3K/Akt. Additionally, Magnolol induced autophagy in SGC-7901 cells at high concentration but was not involved in cell death. Magnolol-induced apoptosis of SGC-7901 cells involves mitochondria and PI3K/Akt-dependent pathways. These findings provide evidence that Magnolol is a promising natural compound for the treatment of gastric cancer and may represent a candidate for in vivo studies of monotherapies or combination antitumor therapies.
Collapse
Affiliation(s)
- Azhar Rasul
- Central Research Laboratory, Jilin University Bethune Second Hospital, Changchun 130041, PR China
| | | | | | | | | | | | | |
Collapse
|
17
|
Kuo DH, Tsai SW, Pan MH. Magnolol blocks homocysteine-induced endothelial dysfunction in porcine coronary arteries. Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.12.101] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
18
|
Chen HH, Lin SC, Chan MH. Protective and Restorative Effects of Magnolol on Neurotoxicity in Mice with 6-Hydroxydopamine-Induced Hemiparkinsonism. NEURODEGENER DIS 2011; 8:364-74. [DOI: 10.1159/000323872] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Accepted: 12/27/2010] [Indexed: 11/19/2022] Open
|
19
|
Peterson J, Dwyer J, Adlercreutz H, Scalbert A, Jacques P, McCullough ML. Dietary lignans: physiology and potential for cardiovascular disease risk reduction. Nutr Rev 2010; 68:571-603. [PMID: 20883417 DOI: 10.1111/j.1753-4887.2010.00319.x] [Citation(s) in RCA: 220] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The present review of the literature on lignan physiology and lignan intervention and epidemiological studies was conducted to determine if lignans decrease the risks of cardiovascular disease in Western populations. Five intervention studies using flaxseed lignan supplements indicated beneficial associations with C-reactive protein, and a meta-analysis that included these studies also suggested lignans have a lowering effect on plasma total and low-density lipoprotein cholesterol. Three intervention studies using sesamin supplements indicated possible lipid- and blood pressure-lowering associations. Eleven human observational epidemiological studies examined dietary intakes of lignans in relation to cardiovascular disease risk. Five showed decreased risk with either increasing dietary intakes of lignans or increased levels of serum enterolactone (an enterolignan used as a biomarker of lignan intake), five studies were of borderline significance, and one was null. The associations between lignans and decreased risk of cardiovascular disease are promising, but they are yet not well established, perhaps due to low lignan intakes in habitual Western diets. At the higher doses used in intervention studies, associations were more evident.
Collapse
Affiliation(s)
- Julia Peterson
- Jean Mayer United States Department of Agriculture Human Nutrition Research Center on Aging and Friedman School of Nutrition Science and Policy, Tufts University, Boston, Massachussets, USA
| | | | | | | | | | | |
Collapse
|
20
|
Ahmad R, Javed S, Bhandari U. Antiapoptotic potential of herbal drugs in cardiovascular disorders: an overview. PHARMACEUTICAL BIOLOGY 2010; 48:358-374. [PMID: 20645713 DOI: 10.3109/13880200903133852] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Cardiomyocyte apoptosis has been reported in a number of cardiovascular disorders, including myocardial infarction, ischemia-reperfusion, end-stage heart failure, arrhythmogenic right ventricular dysplasia, and adriamycin-induced cardiomyopathy. Prevention of myocyte apoptosis has emerged as a potential new target in a multimodel therapeutic approach to cardiac disease. Herbal therapy may be an alternative strategy for the prevention and treatment of heart disease. The present review summarizes the list of plants/herbal formulations studied for their antiapoptotic activity in cardiovascular disorders. However, despite extensive positive research data from experimental studies for herbal drugs in cardiovascular disorders, and the anecdotal clinical experience of many practitioners and patients, its potential in the field of cardiac apoptosis remains largely untapped, and large scale clinical trials are needed to explore the potential of herbal medicines as a new treatment regime for targeting cardiovascular apoptosis.
Collapse
Affiliation(s)
- Rahila Ahmad
- Department of Pharmacology, Faculty of Pharmacy, Hamdard University, New Delhi, India
| | | | | |
Collapse
|
21
|
Yao K, Zhang L, Ye PP, Tang XJ, Zhang YD. Protective effect of magnolol against hydrogen peroxide-induced oxidative stress in human lens epithelial cells. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2009; 37:785-96. [PMID: 19655415 DOI: 10.1142/s0192415x09007247] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Oxidative stress plays a significant role in the progression of cataract. We aimed to investigate the protective effect of magnolol, a compound extracted from the Chinese herb Magnolia officinalis, against oxidative stress in human lens epithelial (HLE) cells as well as the possible molecular mechanism involved. In this study, magnolol was observed to protect against H2O2-induced cytotoxicity in HLE B-3 cells. Magnolol inhibited the generation of reactive oxygen species (ROS), loss of mitochondrial membrane potential (Delta psi m) and release of cytochrome c from mitochondria caused by H2O2 into cytosol in HLE B-3 cells. Magnolol also inhibited H2O2-induced expressions of caspase-9 and caspase-3 and reduction of Bcl-2/Bax ratio. Moreover, magnolol attenuated the deactivation of ERK/MAPK (extracellular signal-regulated kinase/mitogen activated protein kinase) and the enhanced activation of p38, JNK (c-Jun N-terminal kinase) induced by H2O2. Magnolol could be useful in protecting against oxidative stress in HLE cells, suggesting a potential protective effect against cataractogenesis effect against cataractogenesis.
Collapse
Affiliation(s)
- Ke Yao
- Eye Center, Affiliated Second Hospital, College of Medicine, Zhejiang University, Hangzhou, China.
| | | | | | | | | |
Collapse
|
22
|
Chen HY, Hung YC, Lee EJ, Chen TY, Chuang IC, Wu TS. The protective efficacy of magnolol in hind limb ischemia-reperfusion injury. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2009; 16:976-981. [PMID: 19577912 DOI: 10.1016/j.phymed.2009.03.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2008] [Revised: 01/30/2009] [Accepted: 03/11/2009] [Indexed: 05/28/2023]
Abstract
We investigated the protective effects of magnolol, an active antioxidant and free radical scavenger extracted from Magnolia officinalis, in a hind limb ischemic-reperfusion animal model. Adult male Sprague-Dawley rats were subjected to hind limb ischemic insult for 2 hours and were intravenously treated with magnolol at 0.01 mg/kg (n=8), 0.3 mg/kg (n=8) mg/kg or 1 mg/kg (n=8) mg/kg, or vehicle (n=8). At 24 h post-insult, the levels of nitrite/nitrate (NOX), malondialdehyde (MDA) and myeloperoxidase (MPO), as well as the degree of muscle damage, were assessed. Relative to controls, animals treated with magnolol (0.3 and 1 mg/kg) had attenuated muscular inflammation, edema and damage. Magnolol (0.3-1 mg/kg) also effectively reduced postischemic rises in the MDA, NOx and MPO levels (p<0.05, respectively). Magnolol administrated at 0.01 mg/kg, however, failed to protect against the ischemic-perfusion limb injury. In addition, magnolol (0.01-1 mg/kg) did not affect local muscular blood reperfusion or other physiological parameters, including hematocrit, glucose, arterial blood gases and mean arterial blood pressure. Thus, intravenous administration with magnolol at 0.3-1 mg/kg protects against ischemic limb damage in rats. This cytoprotection may be attributed to its antioxidant, anti-nitrosative and anti-inflammatory actions.
Collapse
Affiliation(s)
- Hung-Yi Chen
- Neurophysiology Laboratory, Neurosurgical Service, Department of Surgery, National Cheng Kung University Medical Center and Medical School, 138 Sheng-Li Road, Tainan 70428, Taiwan
| | | | | | | | | | | |
Collapse
|
23
|
Xu XN, Tang ZH, Liang YZ, Zhang LX, Zeng MM, Deng JH. Comparison of the volatile constituents of different parts ofCortex magnolia officinalisby GC-MS combined with chemometric resolution method. J Sep Sci 2009; 32:3466-72. [DOI: 10.1002/jssc.200900378] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
24
|
Liou JY, Chen YL, Loh SH, Chen PY, Hong CY, Chen JJ, Cheng TH, Liu JC. MAGNOLOL DEPRESSES UROTENSIN-II-INDUCED CELL PROLIFERATION IN RAT CARDIAC FIBROBLASTS. Clin Exp Pharmacol Physiol 2009; 36:711-6. [DOI: 10.1111/j.1440-1681.2009.05144.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
25
|
Magnolol encapsulated by different acyl chain length of liposomes on inhibiting proliferation of smooth muscle cells. J Taiwan Inst Chem Eng 2009. [DOI: 10.1016/j.jtice.2008.10.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
26
|
Yang TC, Zhang SW, Sun LN, Wang H, Ren AM. Magnolol attenuates sepsis-induced gastrointestinal dysmotility in rats by modulating inflammatory mediators. World J Gastroenterol 2008; 14:7353-60. [PMID: 19109869 PMCID: PMC2778119 DOI: 10.3748/wjg.14.7353] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the protective effects of magnolol on sepsis-induced inflammation and intestinal dysmotility.
METHODS: Sepsis was induced by a single intraperitoneal injection of lipopolysaccharide (LPS). Male Wistar rats were randomly assigned to one of three treatment groups: magnolol prior to LPS injection (LPS/Mag group); vehicle prior to LPS injection (LPS/Veh group); vehicle prior to injection of saline (Control/Veh). Intestinal transit and circular muscle mechanical activity were assessed 12 h after LPS injection. Tumor necrosis factor-α (TNF-α), interleukin-10 (IL-10), monocyte chemoattractant protein-1 (MCP-1) and inducible nitric oxide synthase (iNOS) mRNA in rat ileum were studied by RT-PCR 2 h after LPS injection. Nuclear factor-κB (NF-κB) activity in the intestine was also investigated at this time using electrophoretic mobility shift assay. In addition, antioxidant activity was determined by measuring malondialdehyde (MDA) concentration and superoxide dismutase (SOD) activity in the intestine 2 h after LPS injection.
RESULTS: Magnolol significantly increased intestinal transit and circular muscle mechanical activity in LPS-treated animals. TNF-α, MCP-1 and iNOS mRNA expression in the small intestine were significantly reduced after magnolol treatment in LPS-induced septic animals, compared with untreated septic animals. Additionally, magnolol significantly increased IL-10 mRNA expression in septic rat ileum. Magnolol also significantly suppressed NF-κB activity in septic rat intestine. In addition, magnolol significantly decreased MDA concentration and increased SOD activity in rat ileum.
CONCLUSION: Magnolol prevents sepsis-induced suppression of intestinal motility in rats. The potential mechanism of this benefit of magnolol appears to be modulation of self-amplified inflammatory events and block of oxidative stress in the intestine.
Collapse
|
27
|
Anti-Apoptotic Effect of Magnolol in Myocardial Ischemia and Reperfusion Injury Requires Extracellular Signal-Regulated Kinase1/2 Pathways in RatIn Vivo. Exp Biol Med (Maywood) 2008; 233:1280-8. [DOI: 10.3181/0803-rm-79] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Magnolol, an active component extracted from Magnolia officinalis, has been reported to have protective effect on ischemia and reperfusion (I/R)-induced injury in experimental animals. The aim of the present investigation was to further evaluate the mechanism(s) by which magnolol reduces I/R-induced myocardial injury in rats in vivo. Under anesthesia, left anterior descending (LAD) coronary artery was occluded for 30 min followed by reperfusion for 24 h (for infarct size and cardiac function analysis). In some experiments, reperfusion was limited to 1 h or 6 h for analysis of biochemical and molecular events. Magnolol and DMSO solution (vehicle) were injected intra-peritoneally 1 h prior to I/R insult. The infarct size was measured by TTC technique and heart function was monitored by Millar Catheter. Apoptosis related events such as p-ERK, p-Bad, Bcl-xl and cytochrome c expression were evaluated by Western blot analysis and myocardial caspase-3 activity was also measured. Magnolol (10 mg/kg) reduced infarct size by 50% ( P < 0.01 versus vehicle), and also improved I/R-induced myocardial dysfunction. Left ventricular systolic pressure and positive and negative maximal values of the first derivative of left ventricular pressure (dP/dt) were significantly improved in magnolol-treated rats. Magnolol increased the expression of phosphor ERK and Bad which resulted in inhibition of myocardial apoptosis as evidenced by TUNEL analysis and DNA laddering experiments. Application of PD 98059, a selective MEK1/2 inhibitor, strongly antagonized the effect of magnolol. Taken together, we concluded that magnolol inhibits apoptosis through enhancing the activation of ERK1/2 and modulation of the Bcl-xl proteins which brings about reduction of infarct size and improvement of cardiac function in I/R-induced injury.
Collapse
|
28
|
Chen CYC. Inhibiting the vascular smooth muscle cells proliferation by EPC and DPPC liposomes encapsulated magnolol. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.jcice.2008.04.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
29
|
Park KH, Kim SY, Gul R, Kim BJ, Jang KY, Chung HT, Sohn DH. Fatty Acids Ameliorate Doxorubicin-Induced Intracellular Ca2+ Increase and Apoptosis in Rat Cardiomyocytes. Biol Pharm Bull 2008; 31:809-15. [DOI: 10.1248/bpb.31.809] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Kwang-Hyun Park
- College of Pharmacy, Medicinal Resources Research Institute, Wonkwang University
| | - Seon-Young Kim
- Department of Biochemistry, Institute of Cardiovascular Research, Chonbuk National University Medical School
| | - Rukhsana Gul
- Department of Biochemistry, Institute of Cardiovascular Research, Chonbuk National University Medical School
| | - Byung-Ju Kim
- Department of Biochemistry, Institute of Cardiovascular Research, Chonbuk National University Medical School
| | - Kyu Yun Jang
- Department of Pathology, Center for Healthcare Technology Development, Chonbuk National University Medical School
| | - Hun-Taeg Chung
- Department of Immunology, Medical Resources Research Institute, Wonkwang University
| | - Dong-Hwan Sohn
- College of Pharmacy, Medicinal Resources Research Institute, Wonkwang University
| |
Collapse
|
30
|
|
31
|
Kim YS, Jung DH, Kim NH, Lee YM, Kim JS. Effect of magnolol on TGF-beta1 and fibronectin expression in human retinal pigment epithelial cells under diabetic conditions. Eur J Pharmacol 2007; 562:12-9. [PMID: 17321517 DOI: 10.1016/j.ejphar.2007.01.048] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2006] [Revised: 01/09/2007] [Accepted: 01/10/2007] [Indexed: 11/15/2022]
Abstract
Magnolol, a natural product isolated from Magnolia officinalis, has various pharmacological effects, such inhibition of effect on inflammation and tumor metastasis, protection against cerebral ischaemic injury, and potent antioxidant activity. In this present study, we evaluated the inhibitory effects of magnolol on transforming growth factor-beta1 (TGF-beta1) and fibronectin expression induced by high concentrations of glucose or S100b (a specific receptor of advance glycation end products ligand) in human retinal pigment epithelial cells (human RPE cells). No effect on cell growth was found with magnolol (up to 20 microg/ml) using a colorimetric 3-(4, 5-dimethylthiazol-2-yl)-2,5-diphenyltertrazolium bromide (MTT) assay. High glucose (25 mM) or S100b (5 microg/ml) induced increases in expression of TGF-beta1 and fibronectin. The increases in TGF-beta1 and fibronectin expression with high glucose or S100b were prevented by magnolol in a dose-dependent manner. Also, magnolol inhibited extracellular signal-regulated kinase (ERK)/mitogen-activated protein kinase (MAPK)/Akt activation. The present study demonstrates that high glucose- or S100b-induced TGF-beta1 and fibronectin expression, but this increased expression is inhibited by magnolol via the ERK/MAPK/Akt signaling pathway in human RPE cells.
Collapse
Affiliation(s)
- Young Sook Kim
- Department of Herbal Pharmaceutical Development, Korea Institute of Oriental Medicine, 461-24, Jeonmin-dong, Yuseng-gu, Daejeon, 305-811, Republic of Korea
| | | | | | | | | |
Collapse
|
32
|
Ou HC, Chou FP, Sheu WHH, Hsu SL, Lee WJ. Protective effects of magnolol against oxidized LDL-induced apoptosis in endothelial cells. Arch Toxicol 2007; 81:421-32. [PMID: 17216433 DOI: 10.1007/s00204-006-0172-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2006] [Accepted: 12/04/2006] [Indexed: 01/12/2023]
Abstract
Magnolol, a compound extracted from the Chinese medicinal herb Magnolia officinalis, has several biological effects. However, its protective effects against endothelial injury remain unclear. In this study, we examined whether magnolol prevents oxidized low density lipoprotein (oxLDL)-induced vascular endothelial apoptosis. Incubation of oxLDL with magnolol (2.5-20 microM) inhibited copper-induced oxidative modification via diene formation, thiobarbituric acid reactive substances (TBARS) assay and electrophoretic mobility assay. Apoptotic cell death as characterized by terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (TUNEL) stain. We measured the production of reactive oxygen species (ROS) by using the fluorescent probe 2',7'-dichlorofluorescein acetoxymethyl ester (DCF-AM), and observed the activity of antioxidant enzymes. Furthermore, several apoptotic signaling pathways which showed NF-kappaB activation, increased cytosolic calcium, alteration of mitochondrial membrane potential, cytochrome c release and activation of caspase 3 were also investigated. We demonstrated that magnolol prevented the copper-induced oxidative modification of LDL. Magnolol attenuated the oxLDL-induced ROS generation and subsequent NF-kappaB activation. Furthermore, intracellular calcium accumulation and subsequent mitochondrial membrane potential collapse, cytochome c release and activation of caspase 3 caused by oxLDL were also inhibited by magnolol. Our results suggest that magnolol may have clinical implications in the prevention of atherosclerotic vascular disease through decreasing the oxLDL-induced ROS production.
Collapse
Affiliation(s)
- Hsiu-Chung Ou
- Department of Education and Medical Research, Taichung Veterans General Hospital, No. 160, Sec. 3, Taichung-Kang Road, Taichung, 407, Taiwan
| | | | | | | | | |
Collapse
|
33
|
Chen SC, Chang YL, Wang DL, Cheng JJ. Herbal remedy magnolol suppresses IL-6-induced STAT3 activation and gene expression in endothelial cells. Br J Pharmacol 2006; 148:226-32. [PMID: 16520748 PMCID: PMC1617057 DOI: 10.1038/sj.bjp.0706647] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Magnolol (Mag), an active constituent isolated from the Chinese herb Hou p'u (Magnolia officinalis) has long been used to suppress inflammatory processes. Chronic inflammation is well known to be involved in vascular injuries such as atherosclerosis in which interleukin (IL)-6 may participate. Signal transducer and activator of transcription protein 3 (STAT3), a transcription factor involved in inflammation and the cell cycle, is activated by IL-6. In this study, we evaluated whether Mag can serve as an anti-inflammatory agent during endothelial injuries. The effects of Mag on IL-6-induced STAT3 activation and downstream target gene induction in endothelial cells (ECs) were examined. Pretreatment of ECs with Mag dose dependently inhibited IL-6-induced Tyr705 and Ser727 phosphorylation in STAT3 without affecting the phosphorylation of JAK1, JAK2, and ERK1/2. Mag pretreatment of these ECs dose dependently suppressed IL-6-induced promoter activity of intracellular cell adhesion molecule (ICAM)-1 that contains functional IL-6 response elements (IREs). An electrophoretic mobility shift assay (EMSA) revealed that Mag treatment significantly reduced STAT3 binding to the IRE region. Consistently, Mag treatment markedly inhibited ICAM-1 expression on the endothelial surface. As a result, reduced monocyte adhesion to IL-6-activated ECs was observed. Furthermore, Mag suppressed IL-6-induced promoter activity of cyclin D1 and monocyte chemotactic protein (MCP)-1 for which STAT3 activation plays a role. In conclusion, our results indicate that Mag inhibits IL-6-induced STAT3 activation and subsequently results in the suppression of downstream target gene expression in ECs. These results provide a therapeutic basis for the development of Mag as an anti-inflammatory agent for vascular disorders including atherosclerosis.
Collapse
Affiliation(s)
- Shih-Chung Chen
- Institute of Clinical Medicine, National Yang-Ming University and Division of Cardiovascular Medicine, Taipei Medical University-Wan-Fang Hospital, Taipei, Taiwan
| | - Ying-Ling Chang
- School of Traditional Chinese Medicine, Chang-Gung University, Taoyuan, Taiwan
| | - Danny Ling Wang
- Cardiovascular Division, Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Jing-Jy Cheng
- National Research Institute of Chinese Medicine, 155-1 Li-Nung Street, Section 2, Shih-Pai, Taipei, Taiwan
- Author for correspondence:
| |
Collapse
|
34
|
Chen SY, Hsiao G, Hwang HR, Cheng PY, Lee YM. Tetramethylpyrazine induces heme oxygenase-1 expression and attenuates myocardial ischemia/reperfusion injury in rats. J Biomed Sci 2006; 13:731-40. [PMID: 16847723 DOI: 10.1007/s11373-006-9098-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2006] [Accepted: 06/13/2006] [Indexed: 10/24/2022] Open
Abstract
The accumulation of oxygen free radicals and activation of neutrophils are strongly implicated as pathophysiological mechanisms mediating myocardial ischemia/reperfusion injury. Heme oxygenase-1 (HO-1) has been reported to play a protective role in oxidative tissue injuries. In this study, the cardioprotective activity of tetramethylpyrazine (TMP), an active ingredient of Chinese medicinal herb Ligusticum wallichii Franchat, was evaluated in an open-chest anesthetized rat model of myocardial ischemia/reperfusion injury. Pretreatment with TMP (5 and 10 mg/kg, i.v.) before left coronary artery occlusion significantly suppressed the occurrence of ventricular fibrillation. After 45 min of ischemia and 1 h of reperfusion, TMP (5 and 10 mg/kg) caused a significant reduction in infarct size and induced HO-1 expression in ischemic myocardium. The HO inhibitor ZnPP (50 microg/rat) markedly reversed the anti-infarct action of TMP. Superoxide anion production in ischemic myocardium after 10 min reperfusion was inhibited by TMP. Furthermore, TMP (200 and 500 microM) significantly suppressed fMLP (800 nM)-activated human neutrophil migration and respiratory burst. In conclusion, TMP suppresses ischemia-induced ventricular arrhythmias and reduces the infarct size resulting from ischemia/reperfusion injury in vivo. This cardioprotective activity of TMP may be associated with its antioxidant activity via induction of HO-1 and with its capacity for neutrophil inhibition.
Collapse
Affiliation(s)
- Shu-Ying Chen
- Department of Nursing, HungKuang University, Taichung, Taiwan
| | | | | | | | | |
Collapse
|
35
|
Chang WC, Yu YM, Hsu YM, Wu CH, Yin PL, Chiang SY, Hung JS. Inhibitory effect of Magnolia officinalis and lovastatin on aortic oxidative stress and apoptosis in hyperlipidemic rabbits. J Cardiovasc Pharmacol 2006; 47:463-8. [PMID: 16633091 DOI: 10.1097/01.fjc.0000211708.03111.6e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Oxidative stress and apoptosis are 2 major characteristics of the progression of atherosclerosis. Both lovastatin and Magnolia officinalis are hypocholesterolemic agents. Therefore, we investigated the effect of M. officinalis extract on the prevention of atherosclerosis in comparison with lovastatin. Twenty hyperlipidemic rabbits were served one of the following diets: a high-fat and cholesterol diet (cholesterol group, 10% corn oil and 0.5% cholesterol), a high fat and cholesterol diet supplemented with M. officinalis extract (300 mg/kg) or lovastatin (6 mg/kg). The plasma lipids, oxidative stress (measured by free radical, malondialdehyde, and oxidative DNA damage), and arterial lesions significantly decreased in the M. officinalis and lovastatin groups when compared with the cholesterol group. Moreover, the expressions of Fas ligand, caspase 8, and caspase 9 in the aortic arches were also markedly lowered after M. officinalis and lovastatin supplements. Therefore, the results indicate that the antiatherogenic effect of M. officinalis is involved with a suppression of oxidative stress and with the down-regulation of apoptosis-related gene expression in hyperlipidemic rabbits.
Collapse
Affiliation(s)
- Weng-Cheng Chang
- Department of Biological Science and Technology, China Medical University and Hospital, Taichung, Taiwan.
| | | | | | | | | | | | | |
Collapse
|
36
|
Liang JC, Chen HR, Chiu CC, Liou SF, Chen IJ, Yeh JL. Protective effect of labedipinedilol-A, a novel dihydropyridine-type calcium channel blocker, on myocardial apoptosis in ischemia-reperfusion injury. Life Sci 2006; 79:1248-56. [PMID: 16647091 DOI: 10.1016/j.lfs.2006.03.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2005] [Revised: 02/24/2006] [Accepted: 03/27/2006] [Indexed: 11/17/2022]
Abstract
The effects of labedipinedilol-A, a novel dihydropyridine-type calcium channel blocker with alpha-/beta-adrenoceptor blocking activities, on myocardial infarct size, apoptosis and necrosis in the rat after myocardial ischemia/reperfusion (45 min/120 min) were investigated. Ten minutes prior to left coronary artery occlusion, rats were treated with vehicle or labedipinedilol-A (0.25 or 0.5 mg/kg, i.v.). In the vehicle group, myocardial ischemia-reperfusion induced creatine kinase (CK) release and caused cardiomyocyte apoptosis, as evidenced by DNA ladder formation and terminal dUTP deoxynucleotidyltransferase nick end-labeling (TUNEL) staining. Treatment with labedipinedilol-A (0.25 or 0.5 mg/kg) reduced infarct size significantly compared to vehicle group (18.75+/-0.65% and 8.27+/-0.29% vs. 41.72+/-0.73%, P<0.01). Labedipinedilol-A also reduced the CK, CK-MB, lactate dehydrogenase (LDH) and troponin T levels in blood. In addition, labedipinedilol-A (0.5 mg/kg) significantly decreased TUNEL positive cells from 19.21+/-0.52% to 9.73+/-0.81% (P<0.01), which is consistent with absence of DNA ladders in the labedipinedilol-A group. Moreover, labedipinedilol-A pretreatment also decreased calcium content in ischemic-reperfused myocardial tissue. In conclusion, these results demonstrate that labedipindielol-A, through reduction of calcium overload and apoptosis, exerts anti-infarct effect during myocardial ischemia-reperfusion and would be useful clinically in the prevention of acute myocardial infarction.
Collapse
Affiliation(s)
- Jhy-Chong Liang
- Department of Early Childhood Care and Education, Chin Min Institute of Technology, Miaoli County, Taiwan
| | | | | | | | | | | |
Collapse
|
37
|
Kong ZL, Tzeng SC, Liu YC. Cytotoxic neolignans: an SAR study. Bioorg Med Chem Lett 2005; 15:163-6. [PMID: 15582432 DOI: 10.1016/j.bmcl.2004.10.011] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2004] [Revised: 10/01/2004] [Accepted: 10/05/2004] [Indexed: 11/22/2022]
Abstract
The neolignans, magnolol 1 and honokiol 2 have been reported to inhibit the growth of several tumor cell lines in vitro and in vivo. The chemical structure of magnolol and honokiol consists of biphenyl skeleton with phenolic and allylic functionalities. Analogs of 1 and 2 containing different substitution have been studies for their effect on the growth of Hep-G2 and their structure-activity relationships were reported in this work.
Collapse
Affiliation(s)
- Zwe-Ling Kong
- Food Science Department, National Taiwan Ocean University, Keelung, Taiwan, ROC
| | | | | |
Collapse
|
38
|
Hirata A, Minamino T, Asanuma H, Sanada S, Fujita M, Tsukamoto O, Wakeno M, Myoishi M, Okada KI, Koyama H, Komamura K, Takashima S, Shinozaki Y, Mori H, Tomoike H, Hori M, Kitakaze M. Erythropoietin Just Before Reperfusion Reduces Both Lethal Arrhythmias and Infarct Size via the Phosphatidylinositol-3 Kinase-Dependent Pathway in Canine Hearts. Cardiovasc Drugs Ther 2005; 19:33-40. [PMID: 15883754 DOI: 10.1007/s10557-005-6895-1] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Although recent studies suggest that erythropoietin (EPO) may reduce multiple features of the myocardial ischemia/reperfusion injury, the cellular mechanisms and the clinical implications of EPO-induced cardioprotection are still unclear. Thus, in this study, we clarified dose-dependent effects of EPO administered just before reperfusion on infarct size and the incidence of ventricular fibrillation and evaluated the involvement of the phosphatidylinositol-3 (PI3) kinase in the in vivo canine model. The canine left anterior descending coronary artery was occluded for 90 min followed by 6 h of reperfusion. A single intravenous administration of EPO just before reperfusion significantly reduced infarct size (high dose (1,000 IU/kg): 7.7 +/- 1.6%, low dose (100 IU/kg): 22.1 +/- 2.4%, control: 40.0 +/- 3.6%) in a dose-dependent manner. Furthermore, the high, but not low, dose of EPO administered as a single injection significantly reduced the incidence of ventricular fibrillation during reperfusion (high dose: 0%, low dose: 40.0%, control: 50.0%). An intracoronary administration of a PI3 kinase inhibitor, wortmannin, blunted the infarct size-limiting and anti-arrhythmic effects of EPO. Low and high doses of EPO equally induced Akt phosphorylation and decreased the equivalent number of TUNEL-positive cells in the ischemic myocardium of dogs. These effects of EPO were abolished by the treatment with wortmannin. In conclusion, EPO administered just before reperfusion reduced infarct size and the incidence of ventricular fibrillation via the PI3 kinase-dependent pathway in canine hearts. EPO administration can be a realistic strategy for the treatment of acute myocardial infarction.
Collapse
Affiliation(s)
- Akio Hirata
- Department of Internal Medicine and Therapeutics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Tzeng SC, Liu YC. Peroxidase-catalyzed synthesis of neolignan and its anti-inflammatory activity. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.molcatb.2004.09.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
40
|
Kirtane AJ, Bui A, Murphy SA, Barron HV, Gibson CM. Association of peripheral neutrophilia with adverse angiographic outcomes in ST-elevation myocardial infarction. Am J Cardiol 2004; 93:532-6. [PMID: 14996574 DOI: 10.1016/j.amjcard.2003.11.013] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2003] [Revised: 11/10/2003] [Accepted: 11/10/2003] [Indexed: 11/19/2022]
Abstract
We hypothesized that absolute and relative neutrophilia would be associated with adverse angiographic outcomes in the 394 patient Limitation of Myocardial Infarction Following Thrombolysis in Acute Myocardial Infarction (LIMIT) Acute Myocardial Infarction (AMI) trial of fibrinolysis in ST-elevation myocardial infarction. The mean neutrophil count was 7.9 x 10(9)/L, with a mean neutrophil percentage of 72%. Patients with time from symptom onset to fibrinolytic treatment more than the median (2.7 hours) had a higher neutrophil count and percentage of neutrophils than patients with shorter time to treatment. Patients with a closed infarct-related artery at 90 minutes (Thrombolysis In Myocardial Infarction [TIMI] grade 0/1 flow) had higher neutrophil counts (8.8 +/- 3.8 vs 7.6 +/- 3.0, p = 0.02) but no difference in the percentage of neutrophils than patients with an open artery. Higher neutrophil counts were also mildly correlated with longer corrected TIMI frame counts (CTFC) in the infarct-related artery (r = 0.14, p = 0.02). Patients with impaired myocardial perfusion by TIMI myocardial perfusion grade (TMPG) had a greater percentage of neutrophils (73.2 +/- 10.7% for TMPG 0/1 vs 69.9 +/- 12.6% for TMPG 2/3, p = 0.047) but no detectable difference in neutrophil counts (8.2 +/- 3.3 vs 7.7 +/- 2.9, p = 0.24). There were no significant associations between other indexes in the cell differential and angiographic or clinical outcomes. Higher neutrophil counts remained independently associated with both closed arteries and CTFC in multivariable models controlling for age, left anterior descending artery infarct location, time to treatment, and pulse and blood pressure on admission. A greater percentage of neutrophils remained independently associated with impaired microvascular perfusion in a similar multivariable model. In patients with ST-elevation myocardial infarction, absolute and relative neutrophilia were associated with impaired epicardial and microvascular perfusion.
Collapse
Affiliation(s)
- Ajay J Kirtane
- Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | | | | | | | | |
Collapse
|
41
|
Akagi M, Tada T, Shirono A, Fukuyama Y, Nakade K, Zhai H, Yasui Y, Akagi R. Neuroprotective effect of magnolol in the hippocampus of senescence-accelerated mice (SAMP1). ACTA ACUST UNITED AC 2004. [DOI: 10.1016/s0531-5131(03)01679-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
42
|
Sand C, Peters SLM, Pfaffendorf M, van Zwieten PA. Effects of hypochlorite and hydrogen peroxide on cardiac autonomic receptors and vascular endothelial function. Clin Exp Pharmacol Physiol 2003; 30:249-53. [PMID: 12680842 DOI: 10.1046/j.1440-1681.2003.03822.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
1. Reactive oxygen species (ROS) are known to be involved in the progression of various cardiovascular diseases. One source of ROS is activated neutrophils, which can release superoxide anion radicals and hydrogen peroxide by membrane-bound NAD(P)H oxidases. These ROS not only destroy bacteria, but may also affect mammalian tissue. In addition, hydrogen peroxide serves as a substrate for myeloperoxidase, an enzyme that is released by activated neutrophils during inflammatory processes, as seen, for instance, in reperfusion injury and atherosclerosis. Myeloperoxidase catalyses the oxidation of chloride by hydrogen peroxide, yielding hypochlorite, an extremely potent oxidant. 2. The purpose of the present study was to evaluate the effects of hypochlorite on a variety of receptor-dependent processes in rat isolated left atria and rat thoracic aorta and to compare these results with the phenomena observed after incubation with hydrogen peroxide. 3. In the presence of hypochlorite (300 micro mol/L), the positive inotropic response of alpha1-adrenoceptor stimulation by methoxamine (300 micro mol/L) was converted into a negative inotropic response. In contrast, the positive inotropic effects of the beta1/beta2-adrenoceptor agonist isoprenaline (3 micro mol/L) and endothelin (ET)-1 (100 nmol/L) remained largely unaffected. 4. The inversion of alpha1-adrenoceptor-mediated inotropy was not obtained in the presence of hydrogen peroxide (500 micro mol/L). Hydrogen peroxide did not affect the positive inotropic response of isoprenaline, but it completely abolished the inotropic effect of ET-1. 5. The effect of cardiac M2-receptor stimulation was studied in the presence of hypochlorite and hydrogen peroxide. The negative inotropic response to acetylcholine (ACh) was significantly enhanced after hypochlorite incubation compared with control. 6. In the rat thoracic aorta, endothelial function, evaluated by means of ACh-induced vasodilation, was completely abolished in the presence of hypochlorite (100 micro mol/L), but remained unaffected by treatment with the same concentration of hydrogen peroxide. 7. From these data, we conclude that hypochlorite exerts more toxic properties than its precursor hydrogen peroxide, leading to substantial physiological alterations in cardiac and vascular tissue.
Collapse
MESH Headings
- Acetylcholine/pharmacology
- Adrenergic alpha-Agonists/pharmacology
- Animals
- Aorta, Thoracic/drug effects
- Aorta, Thoracic/physiology
- Cholinergic Agonists/pharmacology
- Depression, Chemical
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/physiology
- Heart Atria/drug effects
- Hydrogen Peroxide/metabolism
- Hydrogen Peroxide/pharmacology
- Hypochlorous Acid/pharmacology
- In Vitro Techniques
- Male
- Methoxamine/pharmacology
- Muscle Contraction/drug effects
- Muscle Contraction/physiology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/physiology
- Oxidants/pharmacology
- Rats
- Rats, Wistar
- Receptor, Muscarinic M2/drug effects
- Receptor, Muscarinic M2/physiology
- Receptors, Adrenergic, alpha-1/drug effects
- Receptors, Adrenergic, alpha-1/physiology
Collapse
Affiliation(s)
- Carsten Sand
- Department of Pharmacotherapy, Academic Medical Center, University of Amsterdam, The Netherlands.
| | | | | | | |
Collapse
|
43
|
Yang SE, Hsieh MT, Tsai TH, Hsu SL. Effector mechanism of magnolol-induced apoptosis in human lung squamous carcinoma CH27 cells. Br J Pharmacol 2003; 138:193-201. [PMID: 12522090 PMCID: PMC1573650 DOI: 10.1038/sj.bjp.0705024] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
1 Magnolol, an active component isolated from the root and stem bark of Magnolia officinalis, has been reported to exhibit antitumour effects, but little is known about its molecular mechanisms of action. 2 Magnolol inhibited proliferation of human lung squamous carcinoma CH27 cells at low concentrations (10-40 microM), and induced apoptosis at high concentrations (80-100 microM). 3 Treatment with 80 microM magnolol significantly increased the expression of Bad and Bcl-X(S) proteins, whereas it decreased the expression of Bcl-X(L). Overexpression of Bcl-2 protected CH27 cells against magnolol-triggered apoptosis. 4 Magnolol treatment resulted in accumulation of cytosolic cytochrome c and activation of caspase-9 and downstream caspases (caspase-3 and -6). Pretreatment with z-VAD-fmk markedly inhibited magnolol-induced cell death, but did not prevent cytosolic cytochrome c accumulation. 5 Magnolol induced a modest and persistent JNK activation and ERK inactivation in CH27 cells without evident changes in the protein levels. The responsiveness of JNK and ERK to magnolol suggests the involvement of these kinases in the initiation of the apoptosis process. 6 These results indicate that regulation of the Bcl-2 family, accumulation of cytosolic cytochrome c, and activation of caspase-9 and caspase-3 may be the effector mechanisms of magnolol-induced apoptosis.
Collapse
Affiliation(s)
- Shu-Er Yang
- Institute of Chinese Pharmaceutical Sciences, China Medical College Taichung, Taiwan
| | - Ming-Tsuen Hsieh
- Institute of Chinese Pharmaceutical Sciences, China Medical College Taichung, Taiwan
| | - Tung-Hu Tsai
- National Research Institute of Chinese Medicine, Taipei 11221, Taiwan
| | - Shih-Lan Hsu
- Department of Education and Research, Taichung Veterans General Hospital, Taichung, Taiwan
- Author for correspondence:
| |
Collapse
|