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Chear NJY, Ching-Ga TAF, Khaw KY, León F, Tan WN, Yusof SR, McCurdy CR, Murugaiyah V, Ramanathan S. Natural Corynanthe-Type Cholinesterase Inhibitors from Malaysian Uncaria attenuata Korth.: Isolation, Characterization, In Vitro and In Silico Studies. Metabolites 2023; 13:metabo13030390. [PMID: 36984830 PMCID: PMC10059728 DOI: 10.3390/metabo13030390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/23/2023] [Accepted: 03/01/2023] [Indexed: 03/09/2023] Open
Abstract
The Uncaria genus is notable for its therapeutic potential in treating age-related dementia, such as Alzheimer’s disease. A phytochemical study of the leaves of Malaysian Uncaria attenuata Korth., afforded an undescribed natural corynanthe-type oxindole alkaloid, isovillocarine D (1) together with two known indole alkaloids, villocarine A (2) and geissoschizine methyl ether (3), and their structural identification was performed with extensive mono- and bidimensional NMR and MS spectroscopic methods. The isolated alkaloids were evaluated for their acetylcholinesterase (AChE)- and butyrylcholinesterase (BChE)-inhibitory activity. The results indicated that compound (2) was the most potent inhibitor against both AChE and BChE, with IC50 values of 14.45 and 13.95 µM, respectively, whereas compounds (1) and (3) were selective BChE inhibitors with IC50 values of 35.28 and 17.65 µM, respectively. In addition, molecular docking studies revealed that compound (2) interacts with the five main regions of AChE via both hydrogen and hydrophobic bonding. In contrast to AChE, the interactions of (2) with the enzymatic site of BChE are established only through hydrophobic bonding. The current finding suggests that U. attenuata could be a good source of bioactive alkaloids for treating age-related dementia.
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Affiliation(s)
| | - Tan Ai Fein Ching-Ga
- Centre for Drug Research, Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
| | - Kooi-Yeong Khaw
- School of Pharmacy, Monash University Malaysia, Bandar Sunway 47500, Selangor, Malaysia
| | - Francisco León
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, SC 29201, USA
| | - Wen-Nee Tan
- Chemistry Section, School of Distance Education, Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
| | - Siti R. Yusof
- Centre for Drug Research, Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
| | - Christopher R. McCurdy
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Vikneswaran Murugaiyah
- Centre for Drug Research, Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
- Discipline of Pharmacology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
- Correspondence: (V.M.); (S.R.)
| | - Surash Ramanathan
- Centre for Drug Research, Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
- Correspondence: (V.M.); (S.R.)
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2
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Sakamoto J, Kitajima M, Ishikawa H. Total Syntheses of (+)-Villocarine A, (-)-Apogeissoschizine, and (+)-Geissoschizine. Chemistry 2023; 29:e202300179. [PMID: 36670343 DOI: 10.1002/chem.202300179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 01/20/2023] [Accepted: 01/20/2023] [Indexed: 01/22/2023]
Abstract
Total syntheses of geissoschizine-type monoterpenoid indole alkaloids (MTIAs) are reported. An intramolecular Pictet-Spengler cyclization was developed for the selective construction of the 3R stereocenter. The first total synthesis of (+)-villocarine A was then achieved. Furthermore, the first total synthesis of the highly strained (-)-apogeissoschizine was also accomplished in an aza-Michael cyclization/E1cB elimination/stereoselective olefin isomerization sequence. Finally, (+)-geissoschizine, a common biosynthetic intermediate of MTIAs, was obtained from apogeissoschizine through ring-opening along with a release of ring strain.
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Affiliation(s)
- Jukiya Sakamoto
- Graduate School of Pharmaceutical Sciences, Chiba University 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan
| | - Mariko Kitajima
- Graduate School of Pharmaceutical Sciences, Chiba University 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan
| | - Hayato Ishikawa
- Graduate School of Pharmaceutical Sciences, Chiba University 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan
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Hassan NA, Abdelfattah MAO, Mandour YM, El-Shazly AM, Sobeh M, Mahmoud MF. Vasorelaxant Effects of Syzygium samarangense (Blume) Merr. and L.M.Perry Extract Are Mediated by NO/cGMP Pathway in Isolated Rat Thoracic Aorta. Pharmaceuticals (Basel) 2022; 15:1349. [PMID: 36355521 PMCID: PMC9692616 DOI: 10.3390/ph15111349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 10/26/2022] [Accepted: 10/28/2022] [Indexed: 07/22/2023] Open
Abstract
Syzygium samarangense (Blume) Merr. and L.M.Perry is utilized widely in traditional medicine. We have reported previously a wide array of pharmacological properties of its leaf extract, among them anti-inflammatory, antioxidant, hepatoprotective, antidiabetic, antiulcer, and antitrypanosomal activities. We also annotated its chemical composition using LC-MS/MS. Here, we continue our investigations and evaluate the vasorelaxant effects of the leaf extract on aortic rings isolated from rats and explore the possible underlying mechanisms. S. samarangense extract induced a concentration dependent relaxation of the phenylephrine-precontracted aorta in the rat model. However, this effect disappeared upon removing the functional endothelium. Pretreating the aortic tissues either with propranolol or NG-nitro-L-arginine methyl ester inhibited the relaxation induced by the extract; however, atropine did not affect the extract-induced vasodilation. Meanwhile, adenylate cyclase inhibitor, MDL; specific guanylate cyclase inhibitor, ODQ; high extracellular KCl; and indomethacin as cyclooxygenase inhibitor inhibited the extract-induced vasodilation. On the other hand, incubation of S. samarangense extract with aortae sections having their intact endothelium pre-constricted using phenylephrine or KCl in media free of Ca2+ showed no effect on the constriction of the aortae vessels induced by Ca2+. Taken together, the present study suggests that S. samarangense extract dilates isolated aortic rings via endothelium-dependent nitric oxide (NO)/cGMP signaling. The observed biological effects could be attributed to its rich secondary metabolites. The specific mechanisms of the active ingredients of S. samarangense extract await further investigations.
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Affiliation(s)
- Noura A. Hassan
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | | | - Yasmine M. Mandour
- School of Life and Medical Sciences, University of Hertfordshire Hosted by Global Academic Foundation, New Administrative Capital, Cairo 11578, Egypt
| | - Assem M. El-Shazly
- Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
- Faculty of Pharmacy, El Saleheya El Gadida University, El Saleheya El Gadida 44813, Egypt
| | - Mansour Sobeh
- AgroBioSciences, Mohammed VI Polytechnic University, Lot 660-Hay Moulay Rachid, Ben-Guerir 43150, Morocco
| | - Mona F. Mahmoud
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
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4
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An updated review on the antimicrobial and pharmacological properties of the genus Uncaria (Rubiaceae). J Herb Med 2022. [DOI: 10.1016/j.hermed.2022.100573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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5
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Omar F, Tareq AM, Alqahtani AM, Dhama K, Sayeed MA, Emran TB, Simal-Gandara J. Plant-Based Indole Alkaloids: A Comprehensive Overview from a Pharmacological Perspective. Molecules 2021; 26:molecules26082297. [PMID: 33921093 PMCID: PMC8071433 DOI: 10.3390/molecules26082297] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 04/09/2021] [Accepted: 04/12/2021] [Indexed: 12/12/2022] Open
Abstract
Plant-based indole alkaloids are very rich in pharmacological activities, and the indole nucleus is considered to contribute greatly to these activities. This review's fundamental objective is to summarize the pharmacological potential of indole alkaloids that have been derived from plants and provide a detailed evaluation of their established pharmacological activities, which may contribute to identifying new lead compounds. The study was performed by searching various scientific databases, including Springer, Elsevier, ACS Publications, Taylor and Francis, Thieme, Wiley Online Library, ProQuest, MDPI, and online scientific books. A total of 100 indole compounds were identified and reviewed. The most active compounds possessed a variety of pharmacological activities, including anticancer, antibacterial, antiviral, antimalarial, antifungal, anti-inflammatory, antidepressant, analgesic, hypotensive, anticholinesterase, antiplatelet, antidiarrheal, spasmolytic, antileishmanial, lipid-lowering, antimycobacterial, and antidiabetic activities. Although some compounds have potent activity, some only have mild-to-moderate activity. The pharmacokinetic profiles of some of the identified compounds, such as brucine, mitragynine, 7-hydroxymitragynine, vindoline, and harmane, were also reviewed. Most of these compounds showed promising pharmacological activity. An in-depth pharmacological evaluation of these compounds should be performed to determine whether any of these indoles may serve as new leads.
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Affiliation(s)
- Faisal Omar
- Department of Pharmacy, International Islamic University Chittagong, Chittagong 4318, Bangladesh; (F.O.); (A.M.T.)
| | - Abu Montakim Tareq
- Department of Pharmacy, International Islamic University Chittagong, Chittagong 4318, Bangladesh; (F.O.); (A.M.T.)
| | - Ali M. Alqahtani
- Department of Pharmacology, College of Pharmacy, King Khalid University, Abha 62529, Saudi Arabia;
| | - Kuldeep Dhama
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly 243122, Uttar Pradesh, India;
| | - Mohammed Abu Sayeed
- Department of Pharmacy, International Islamic University Chittagong, Chittagong 4318, Bangladesh; (F.O.); (A.M.T.)
- Correspondence: (M.A.S.); (T.B.E.); (J.S.-G.); Tel.: +88-0-167-041-9435 (M.A.S.); +88-0-181-994-2214 (T.B.E.); +34-988-387000 (J.S.-G.)
| | - Talha Bin Emran
- Department of Pharmacy, BGC Trust University Bangladesh, Chittagong 4381, Bangladesh
- Correspondence: (M.A.S.); (T.B.E.); (J.S.-G.); Tel.: +88-0-167-041-9435 (M.A.S.); +88-0-181-994-2214 (T.B.E.); +34-988-387000 (J.S.-G.)
| | - Jesus Simal-Gandara
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, University of Vigo—Ourense Campus, E32004 Ourense, Spain
- Correspondence: (M.A.S.); (T.B.E.); (J.S.-G.); Tel.: +88-0-167-041-9435 (M.A.S.); +88-0-181-994-2214 (T.B.E.); +34-988-387000 (J.S.-G.)
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6
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Qin N, Lu X, Liu Y, Qiao Y, Qu W, Feng F, Sun H. Recent research progress of Uncaria spp. based on alkaloids: phytochemistry, pharmacology and structural chemistry. Eur J Med Chem 2020; 210:112960. [PMID: 33148492 DOI: 10.1016/j.ejmech.2020.112960] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 10/16/2020] [Accepted: 10/18/2020] [Indexed: 02/06/2023]
Abstract
Medicinal plants are well-known in affording clinically useful agents, with rich medicinal values by combining with disease targets through various mechanisms. Plant secondary metabolites as lead compounds lay the foundation for the discovery and development of new drugs in disease treatment. Genus Uncaria from Rubiaceae family is a significant plant source of active alkaloids, with anti-hypertensive, sedative, anti-Alzheimer's disease, anti-drug addiction and anti-inflammatory effects. This review summarizes and discuss the research progress of Uncaria based on alkaloids in the past 15 years, mainly in the past 5 years, including biosynthesis, phytochemistry, pharmacology and structural chemistry. Among, focusing on representative compounds rhynchophylline and isorhynchophylline, the pharmacological activities surrounding the central nervous system and cardiovascular system are described in detail. On the basis of case studies, this article provides a brief overview of the synthesis and analogues of representative compounds types. In summary, this review provides an early basis for further searching for new targets and activities, discussing the mechanisms of pharmacological activity and studying the structure-activity relationships of active molecules.
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Affiliation(s)
- Nan Qin
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Xin Lu
- School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Yijun Liu
- School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Yuting Qiao
- School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Wei Qu
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Feng Feng
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing, 211198, People's Republic of China; Jiangsu Food and Pharmaceutical Science College, Huaian, 223003, People's Republic of China.
| | - Haopeng Sun
- School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, People's Republic of China; Jiangsu Food and Pharmaceutical Science College, Huaian, 223003, People's Republic of China.
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7
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Liang JH, Luan ZL, Tian XG, Zhao WY, Wang YL, Sun CP, Huo XK, Deng S, Zhang BJ, Zhang ZJ, Ma XC. Uncarialins A-I, Monoterpenoid Indole Alkaloids from Uncaria rhynchophylla as Natural Agonists of the 5-HT 1A Receptor. JOURNAL OF NATURAL PRODUCTS 2019; 82:3302-3310. [PMID: 31789520 DOI: 10.1021/acs.jnatprod.9b00532] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Nine new monoterpenoid indole alkaloids, uncarialins A-I (1-9), were isolated from Uncaria rhynchophylla as well as 14 known analogues (10-23). Their structures were determined by HRESIMS, 1D and 2D NMR, and experimental and calculated electronic circular dichroism data. Compounds 5, 7, 15, and 22 displayed significant agonistic effects against the 5-HT1A receptor with EC50 values of 2.2 ± 0.1, 0.1 ± 0.1, 1.6 ± 0.3, and 2.0 ± 0.5 μM, respectively. The mechanisms of action of these four compounds with the 5-HT1A receptor were investigated by molecular docking, and the results suggested that amino acid residues Asp116, Thr196, Asn386, and Tyr390 played critical roles in the observed activity of the above-mentioned compounds.
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Affiliation(s)
- Jia-Hao Liang
- College of Pharmacy, College of Integrative Medicine, The National & Local Joint Engineering Research Center for Drug Development of Neurodegenerative Disease , Dalian Medical University , Dalian 116044 , People's Republic of China
| | - Zhi-Lin Luan
- College of Pharmacy, College of Integrative Medicine, The National & Local Joint Engineering Research Center for Drug Development of Neurodegenerative Disease , Dalian Medical University , Dalian 116044 , People's Republic of China
| | - Xiang-Ge Tian
- College of Pharmacy, College of Integrative Medicine, The National & Local Joint Engineering Research Center for Drug Development of Neurodegenerative Disease , Dalian Medical University , Dalian 116044 , People's Republic of China
| | - Wen-Yu Zhao
- College of Pharmacy, College of Integrative Medicine, The National & Local Joint Engineering Research Center for Drug Development of Neurodegenerative Disease , Dalian Medical University , Dalian 116044 , People's Republic of China
| | - Ya-Li Wang
- College of Pharmacy, College of Integrative Medicine, The National & Local Joint Engineering Research Center for Drug Development of Neurodegenerative Disease , Dalian Medical University , Dalian 116044 , People's Republic of China
| | - Cheng-Peng Sun
- College of Pharmacy, College of Integrative Medicine, The National & Local Joint Engineering Research Center for Drug Development of Neurodegenerative Disease , Dalian Medical University , Dalian 116044 , People's Republic of China
| | - Xiao-Kui Huo
- College of Pharmacy, College of Integrative Medicine, The National & Local Joint Engineering Research Center for Drug Development of Neurodegenerative Disease , Dalian Medical University , Dalian 116044 , People's Republic of China
| | - Sa Deng
- College of Pharmacy, College of Integrative Medicine, The National & Local Joint Engineering Research Center for Drug Development of Neurodegenerative Disease , Dalian Medical University , Dalian 116044 , People's Republic of China
| | - Bao-Jing Zhang
- College of Pharmacy, College of Integrative Medicine, The National & Local Joint Engineering Research Center for Drug Development of Neurodegenerative Disease , Dalian Medical University , Dalian 116044 , People's Republic of China
| | - Zhan-Jun Zhang
- State Key Laboratory of Cognitive Neuroscience and Learning , Beijing Normal University , Beijing 100875 , People's Republic of China
| | - Xiao-Chi Ma
- College of Pharmacy, College of Integrative Medicine, The National & Local Joint Engineering Research Center for Drug Development of Neurodegenerative Disease , Dalian Medical University , Dalian 116044 , People's Republic of China
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy , Xuzhou Medical University , Xuzhou 221004 , People's Republic of China
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9
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New zwitterionic monoterpene indole alkaloids from Uncaria rhynchophylla. Fitoterapia 2018; 127:47-55. [DOI: 10.1016/j.fitote.2018.01.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 01/18/2018] [Accepted: 01/21/2018] [Indexed: 11/21/2022]
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10
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Pan H, Yao C, Yang W, Yao S, Huang Y, Zhang Y, Wu W, Guo D. An enhanced strategy integrating offline two-dimensional separation and step-wise precursor ion list-based raster-mass defect filter: Characterization of indole alkaloids in five botanical origins of Uncariae Ramulus Cum Unicis as an exemplary application. J Chromatogr A 2018; 1563:124-134. [PMID: 29880214 DOI: 10.1016/j.chroma.2018.05.066] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 04/20/2018] [Accepted: 05/28/2018] [Indexed: 01/01/2023]
Abstract
Comprehensive chemical profiling is of great significance for understanding the therapeutic material basis and quality control of herbal medicines, which is challenging due to its inherent chemical diversity and complexity, as well as wide concentration range. In this study, we introduced an enhanced strategy integrating offline two-dimensional (2D) separation and the step-wise precursor ion list-based raster-mass defect filter (step-wise PIL-based raster-MDF) scan by tandem LTQ-Orbitrap mass spectrometer. A comprehensive analysis of indole alkaloids in five botanical origins of Uncariae Ramulus Cum Unicis (Gou-Teng) was used as an exemplary application. A positively charged reversed phase (PR) × conventional RP LC system in different pH conditions was constructed with the orthogonality of 74%. A theoretical step-wise PIL among 310-950 Da with the step-size of 2 Da was developed to selectively trigger fragmentations and extend the coverage of potential indole alkaloids. Simultaneously, by defining parent mass width (PMW) of the step-wise PIL to ±55 mDa, a raster-MDF screening was achieved in the acquisition process. Additionally, subtype classification and structural elucidation were facilitated by a four-step interpretation strategy. As a result, a total of 1227 indole alkaloids were efficiently exposed and characterized from five botanical origins of Gou-Teng, which showed high chemical diversity. A systematic comparison among five species was first performed and only 66 indole alkaloids were common. For method validation, three new alkaloid N-oxides were isolated and unambiguously identified by NMR. The present study provides a novel data-dependent acquisition method with improved target coverage and high selectivity. The integrated strategy is practical to efficiently expose and comprehensively characterize complex components in herbal medicines.
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Affiliation(s)
- Huiqin Pan
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences,Haike Road 501, Shanghai, 201203, People's Republic of China; University of Chinese Academy of Sciences,No.19A Yuquan Road, Beijing, 100049, People's Republic of China
| | - Changliang Yao
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences,Haike Road 501, Shanghai, 201203, People's Republic of China; University of Chinese Academy of Sciences,No.19A Yuquan Road, Beijing, 100049, People's Republic of China
| | - Wenzhi Yang
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences,Haike Road 501, Shanghai, 201203, People's Republic of China
| | - Shuai Yao
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences,Haike Road 501, Shanghai, 201203, People's Republic of China
| | - Yong Huang
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences,Haike Road 501, Shanghai, 201203, People's Republic of China
| | - Yibei Zhang
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences,Haike Road 501, Shanghai, 201203, People's Republic of China
| | - Wanying Wu
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences,Haike Road 501, Shanghai, 201203, People's Republic of China.
| | - Dean Guo
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences,Haike Road 501, Shanghai, 201203, People's Republic of China.
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11
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Loh YC, Ch'ng YS, Tan CS, Ahmad M, Asmawi MZ, Yam MF. Mechanisms of Action of Uncaria rhynchophylla Ethanolic Extract for Its Vasodilatory Effects. J Med Food 2017; 20:895-911. [DOI: 10.1089/jmf.2016.3804] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Yean Chun Loh
- Department of Pharmacology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Yung Sing Ch'ng
- Department of Pharmacology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Chu Shan Tan
- Department of Pharmacology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Mariam Ahmad
- Department of Pharmacology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Mohd Zaini Asmawi
- Department of Pharmacology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia
| | - Mun Fei Yam
- Department of Pharmacology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia
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12
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Pan HQ, Yang WZ, Zhao D, Luo C, Yao CL, Shi XJ, Zhang YB, Li SY, Bi Y, Wang Z, Yao S, Wu WY, Guo DA. New monoterpenoid oxindole alkaloid derivatives from the stems of Uncaria hirsuta Havil. and their cytotoxicity and tandem mass spectrometric fragmentation. Fitoterapia 2017; 116:85-92. [DOI: 10.1016/j.fitote.2016.11.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/11/2016] [Accepted: 11/19/2016] [Indexed: 01/19/2023]
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13
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Álvarez-Calero JM, Jorge ZD, Massanet GM. TiCl4/Et3N-Mediated Condensation of Acetate and Formate Esters: Direct Access to β-Alkoxy- and β-Aryloxyacrylates. Org Lett 2016; 18:6344-6347. [DOI: 10.1021/acs.orglett.6b03233] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- José María Álvarez-Calero
- Departamento de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Zacarías D. Jorge
- Departamento de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Guillermo M. Massanet
- Departamento de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
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14
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Overview of Antagonists Used for Determining the Mechanisms of Action Employed by Potential Vasodilators with Their Suggested Signaling Pathways. Molecules 2016; 21:495. [PMID: 27092479 PMCID: PMC6274436 DOI: 10.3390/molecules21040495] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 03/23/2016] [Accepted: 03/28/2016] [Indexed: 01/04/2023] Open
Abstract
This paper is a review on the types of antagonists and the signaling mechanism pathways that have been used to determine the mechanisms of action employed for vasodilation by test compounds. Thus, we exhaustively reviewed and analyzed reports related to this topic published in PubMed between the years of 2010 till 2015. The aim of this paperis to suggest the most appropriate type of antagonists that correspond to receptors that would be involved during the mechanistic studies, as well as the latest signaling pathways trends that are being studied in order to determine the route(s) that atest compound employs for inducing vasodilation. The methods to perform the mechanism studies were included. Fundamentally, the affinity, specificity and selectivity of the antagonists to their receptors or enzymes were clearly elaborated as well as the solubility and reversibility. All the signaling pathways on the mechanisms of action involved in the vascular tone regulation have been well described in previous review articles. However, the most appropriate antagonists that should be utilized have never been suggested and elaborated before, hence the reason for this review.
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Qu Z, Zhang J, Yang H, Huo L, Gao J, Chen H, Gao W. Protective effect of tetrahydropalmatine against d-galactose induced memory impairment in rat. Physiol Behav 2016; 154:114-25. [DOI: 10.1016/j.physbeh.2015.11.016] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 10/23/2015] [Accepted: 11/20/2015] [Indexed: 12/30/2022]
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16
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Zhang Q, Zhao JJ, Xu J, Feng F, Qu W. Medicinal uses, phytochemistry and pharmacology of the genus Uncaria. JOURNAL OF ETHNOPHARMACOLOGY 2015; 173:48-80. [PMID: 26091967 DOI: 10.1016/j.jep.2015.06.011] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 05/31/2015] [Accepted: 06/05/2015] [Indexed: 05/26/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The genus Uncaria belongs to the family Rubiaceae, which mainly distributed in tropical regions, such as Southeast Asia, Africa and Southeast America. Their leaves and hooks have long been thought to have healing powers and are already being tested as a treatment for asthma, cancer, cirrhosis, diabetes, hypertension, stroke and rheumatism. The present review aims to provide systematically reorganized information on the ethnopharmacology, phytochemistry and pharmacology of the genus Uncaria to support for further therapeutic potential of this genus. To better understanding this genus, information on the stereo-chemistry and structure-activity relationships in indole alkaloids is also represented. MATERIAL AND METHODS The literature study of this review is based on various databases search (SCIFinder, Science Direct, CNKI, Wiley online library, Spring Link, Web of Science, PubMed, Wanfang Data, Medalink, Google scholar, ACS, Tropicos, Council of Heads of Australasian Herbaria, The New York Botanical Garden, African Plants Database at Genera Botanical Garden, The Plant List and SEINet) and library search for Biological Abstract and some local books on ethnopharmacology. RESULTS 19 species of the genus Uncaria are found to be important folk medicines in China, Malaysia, Phillippines, Africa and Southeast America, etc, and have been served for the treatment of asthma, rheumatism, hyperpyrexia, hypertension and headaches, etc. More than 200 compounds have been isolated from Uncaria, including indole alkaloids, triterpenes, flavonoids, phenols, phenylpropanoids, etc. As characteristic constituents, indole alkaloids have been considered as main efficacy component for hypertension, epilepsy, depressant, Parkinson's disease and Alzheimer's disease. In addition, pharmacokinetic and metabolism investigation reveal that the indole alkaloids are likely to be absorbed, metabolized and excreted at early time points. Moreover, the specific inhibition of CYP isozymes can regulate their hydroxylation metabolites at C-10 and C-11. CONCLUSION Preliminary investigations on pharmacological properties of the Uncaria species have enlightened their efficacious remedy for hypertension, asthma, cancer, diabetes, rheumatism and neurodegenerative diseases. To ensure the safety and effectiveness in clinical application, research on bioactive compounds, pharmacological mechanisms and toxicity of the genus Uncaria as well as the stereo-chemistry and structure-activity relationships of indole alkaloids seem very important.
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Affiliation(s)
- Qian Zhang
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Jiao Jiao Zhao
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Jian Xu
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Feng Feng
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China.
| | - Wei Qu
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China.
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Huo L, Zhang J, Qu Z, Chen H, Li Y, Gao W. Vasorelaxant effects of Shunaoxin pill are mediated by NO/cGMP pathway, HO/CO pathway and calcium channel blockade in isolated rat thoracic aorta. JOURNAL OF ETHNOPHARMACOLOGY 2015; 173:352-360. [PMID: 26239154 DOI: 10.1016/j.jep.2015.07.048] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 07/27/2015] [Accepted: 07/31/2015] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Shunaoxin pill (SNX), one of the famous classical recipes in traditional Chinese medicine, is developed from the "Decoction of Xionggui". It has been used for treatment of cerebrovascular related diseases. It is well known that vasodilatation plays a very important role in cerebrovascular diseases. The effect of SNX on vasorelaxant activity has not yet been explored. Therefore, we aimed to investigate the vasorelaxant effects of SNX on isolated rat thoracic aorta so as to assess some of the possible mechanisms. We also investigate the gasotransmitter signaling pathway involved which has been rarely reported in isolated rat thoracic aorta before. AIM OF THE STUDY The present study was performed to examine the vasodilative activity of SNX and its mechanisms in isolated rat thoracic aorta. MATERIALS AND METHODS SNX was studied on isolated rat thoracic aorta in vitro, including endothelium-intact and endothelium-denuded aortic rings. In present study, specific inhibitors including soluble guanylate cyclase (sGC) inhibitor 1 H-[1,2,4]oxadiazolo[4,3-a]quinoxaline-1-one (ODQ), cyclooxygenase (COX) inhibitor indomethacin (INDO), NO synthase inhibitor NG-nitro-l-arginine methyl ester (L-NAME), heme oxygenase-1 (HO-1) inhibitor zinc-protoporphyrin (ZnPP), cystathionine γ-lyase (CSE) inhibitor DL-Propargylglycine (PAG), non-selective K(+) channel inhibitor tetraethylammonium chloride (TEA), KV channel inhibitor 4-Aminopyridine (4-AP), and KATP channel inhibitor Glibenclamide (Gli) were used, they were added 20min before NE contraction and then added SNX to induce vasodilation. RESULTS Removal of endothelium or pretreatment of aortic rings (intact endothelium) with L-NAME, ODQ or ZnPP significantly blocked SNX-induced relaxation. Pretreatment with the non-selective K(+) channel inhibitor TEA, KV channel inhibitor 4-AP or the KATP channel inhibitor Gli, none of them had influences on the SNX-induced response (p>0.05). Besides, SNX inhibited the contraction triggered by NE in endothelium-denuded rings in Ca(2+)-free medium. SNX also produced rightward parallel displacement of CaCl2 curves. CONCLUSIONS These results suggest that SNX can induce less endothelium-dependent and more endothelium-independent vascular relaxation. The NO/cGMP and HO/CO pathways, blockade of Ca(2+) channels are inhibition of IP3R mediated Ca(2+) mobilization from intracellular stores, are likely involved in this relaxation. Furthermore, the underlying mechanisms of combined compositions in SNX await further investigations.
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Affiliation(s)
- Liqin Huo
- School of Pharmaceutical Science and Technology, Tianjin University, Weijin Road, Tianjin 300072, China
| | - Jingze Zhang
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Logistics College of Chinese People's Armed Police Forces, Tianjin 300162, China; Department of Pharmacy, Logistics College of Chinese People's Armed Police Forces, Tianjin 300162, China
| | - Zhuo Qu
- School of Pharmaceutical Science and Technology, Tianjin University, Weijin Road, Tianjin 300072, China
| | - Hong Chen
- Department of Pharmacy, Logistics College of Chinese People's Armed Police Forces, Tianjin 300162, China
| | - Yuming Li
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Logistics College of Chinese People's Armed Police Forces, Tianjin 300162, China
| | - Wenyuan Gao
- School of Pharmaceutical Science and Technology, Tianjin University, Weijin Road, Tianjin 300072, China.
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18
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Martins D, Nunez CV. Secondary metabolites from Rubiaceae species. Molecules 2015; 20:13422-95. [PMID: 26205062 PMCID: PMC6331836 DOI: 10.3390/molecules200713422] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Revised: 07/11/2015] [Accepted: 07/13/2015] [Indexed: 11/16/2022] Open
Abstract
This study describes some characteristics of the Rubiaceae family pertaining to the occurrence and distribution of secondary metabolites in the main genera of this family. It reports the review of phytochemical studies addressing all species of Rubiaceae, published between 1990 and 2014. Iridoids, anthraquinones, triterpenes, indole alkaloids as well as other varying alkaloid subclasses, have shown to be the most common. These compounds have been mostly isolated from the genera Uncaria, Psychotria, Hedyotis, Ophiorrhiza and Morinda. The occurrence and distribution of iridoids, alkaloids and anthraquinones point out their chemotaxonomic correlation among tribes and subfamilies. From an evolutionary point of view, Rubioideae is the most ancient subfamily, followed by Ixoroideae and finally Cinchonoideae. The chemical biosynthetic pathway, which is not so specific in Rubioideae, can explain this and large amounts of both iridoids and indole alkaloids are produced. In Ixoroideae, the most active biosysthetic pathway is the one that produces iridoids; while in Cinchonoideae, it produces indole alkaloids together with other alkaloids. The chemical biosynthetic pathway now supports this botanical conclusion.
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Affiliation(s)
- Daiane Martins
- Bioprospection and Biotechnology Laboratory, Technology and Innovation Coordenation, National Research Institute of Amazonia, Av. André Araújo, 2936, Petrópolis, Manaus, AM 69067-375, Brazil
| | - Cecilia Veronica Nunez
- Bioprospection and Biotechnology Laboratory, Technology and Innovation Coordenation, National Research Institute of Amazonia, Av. André Araújo, 2936, Petrópolis, Manaus, AM 69067-375, Brazil.
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19
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Wong SP, Gan CY, Lim KH, Ting KN, Low YY, Kam TS. Arboridinine, a Pentacyclic Indole Alkaloid with a New Cage Carbon-Nitrogen Skeleton Derived from a Pericine Precursor. Org Lett 2015; 17:3628-31. [PMID: 26183592 DOI: 10.1021/acs.orglett.5b01757] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new monoterpene indole alkaloid characterized by an unprecedented pentacyclic cage skeleton, arboridinine (1), was isolated from a Malaysian Kopsia species. The structure and absolute configuration of the alkaloid were determined based on NMR, MS, and X-ray diffraction analysis. A possible biogenetic pathway from a pericine precursor is presented.
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Affiliation(s)
- Suet-Pick Wong
- †Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Chew-Yan Gan
- ‡University Malaysia of Computer Science and Engineering, Jalan Alamanda 2, Precint 1, 62000 Putrajaya, Malaysia
| | | | | | - Yun-Yee Low
- †Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Toh-Seok Kam
- †Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
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20
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Qu Z, Zhang J, Huo L, Chen H, Li H, Fan Y, Gao W. Antihypertensive and vasorelaxant effects of Rhizoma corydalis and its active component tetrahydropalmatine via NO/cGMP pathway and calcium channel blockade in isolated rat thoracic aorta. RSC Adv 2015. [DOI: 10.1039/c5ra17756a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The vasorelaxant effects of RC and THPviathe NO/cGMP pathway and calcium channel blockade in isolated rat thoracic aorta are explored.
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Affiliation(s)
- Zhuo Qu
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency
- School of Pharmaceutical Science and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Jingze Zhang
- Department of Pharmacy
- Logistics College of Chinese People’s Armed Police Forces
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury
- Tianjin 300162
- China
| | - Liqin Huo
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency
- School of Pharmaceutical Science and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Hong Chen
- Department of Pharmacy
- Logistics College of Chinese People’s Armed Police Forces
- Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury
- Tianjin 300162
- China
| | - Hongfa Li
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency
- School of Pharmaceutical Science and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Yaya Fan
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency
- School of Pharmaceutical Science and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Wenyuan Gao
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency
- School of Pharmaceutical Science and Technology
- Tianjin University
- Tianjin 300072
- China
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21
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Nge CE, Gan CY, Lim KH, Ting KN, Low YY, Kam TS. Criofolinine and Vernavosine, New Pentacyclic Indole Alkaloids Incorporating Pyrroloazepine and Pyridopyrimidine Moieties Derived from a Common Yohimbine Precursor. Org Lett 2014; 16:6330-3. [DOI: 10.1021/ol503072g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Choy-Eng Nge
- Department
of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Chew-Yan Gan
- University Malaysia of Computer Science and Engineering, Jalan Alamanda 2, Precint 1, 62000 Putrajaya, Malaysia
| | | | | | - Yun-Yee Low
- Department
of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Toh-Seok Kam
- Department
of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
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22
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Qu Z, Zhang J, Gao W, Chen H, Guo H, Wang T, Li H, Liu C. Vasorelaxant effects of Cerebralcare Granule® are mediated by NO/cGMP pathway, potassium channel opening and calcium channel blockade in isolated rat thoracic aorta. JOURNAL OF ETHNOPHARMACOLOGY 2014; 155:572-579. [PMID: 24924524 DOI: 10.1016/j.jep.2014.05.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 05/26/2014] [Accepted: 05/31/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Cerebralcare Granule (CG), one of the famous classical recipes in traditional Chinese medicine, is developed from the "Decoction of Four Drugs". It has been used for treatment of cerebrovascular related diseases, such as hypertension. It is well known that vasodilatation plays a very important role in hypertensive. Despite the popular medicinal use of CG, little data was available to its activity and mechanism involved in vasodilatation. Therefore, we aimed to investigate the vasorelaxant effects of CG on isolated rat thoracic aorta so as to assess some of the possible mechanisms. The present study was performed to examine the vasodilative activity of CG and its mechanisms in isolated rat thoracic aorta. MATERIALS AND METHODS CG was studied on isolated rat thoracic aorta in vitro, including endothelium-intact and endothelium-denuded aortic rings. In present study, specific inhibitors including NO synthase inhibitor NG-nitro-L-arginine methyl ester (L-NAME), cyclooxygenase (COX) inhibitor indomethacin (INDO), non-selective K+ channel inhibitor tetraethylammonium chloride (TEA), Kir channel inhibitor BaCl2, KATP channel inhibitor Glibenclamide (Gli) and cholinergic receptor antagonist atropine were used, they were added 20 min before NE contraction and then added CG-induced vasodilation. RESULTS Removal of endothelium or pretreatment of aortic rings (intact endothelium) with L-NAME (0.1 mM) or INDO (0.01 mM) significantly blocked the CG induced relaxation. Pretreatment with the non-selective K+ channel inhibitor TEA (1 mM), or the Kir channel inhibitor BaCl2 (0.1 mM), neither of them had no influence on the CG-induced response (p>0.05). However, pretreatment with the KATP channel inhibitor Gli (0.01 mM) produced significant inhibition on the CG-induced response (p<0.01). Besides, CG also inhibited the contraction triggered by NE in endothelium-denuded rings in Ca2+-free medium. CG (0.4, 0.8 and 3.2 mg/mL) produced rightward parallel displacement of CaCl2 curves and reduced the maximum contraction induced by 30 mM CaCl2 to 31.1±9.3%, 18.8±6.9% and 9.4±4.5%, respectively. The relaxation, induced by CG on endothelium-intact rat aortic rings pre-contracted with NE, was significantly attenuated in the presence of atropine (EC50=3.7 mg/mL, p<0.01). CONCLUSIONS Our results suggest that CG induces relaxation in rat aortic rings through an endothelium-dependent pathway mediated by NO/cGMP pathway and an endothelium-independent pathway involving blockade of Ca2+ channels, inhibition of Ca2+ mobilization from intracellular stores, opening of KATP channel. In addition, the muscarinic receptor stimulation is also one of the vasorelaxant mechanisms.
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Affiliation(s)
- Zhuo Qu
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Jingze Zhang
- Department of Pharmacy, Logistics College of Chinese People׳s Armed Police Forces, Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Tianjin 300162, China
| | - Wenyuan Gao
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China.
| | - Hong Chen
- Department of Pharmacy, Logistics College of Chinese People׳s Armed Police Forces, Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Tianjin 300162, China
| | - Huimin Guo
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Tingting Wang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Hongfa Li
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Changxiao Liu
- The State Key Laboratories of Pharmacodynamics and Pharmacokinetics, Tianjin, China
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23
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Qi W, Yue SJ, Sun JH, Simpkins JW, Zhang L, Yuan D. Alkaloids from the hook-bearing branch of Uncariarhynchophylla and their neuroprotective effects against glutamate-induced HT22 cell death. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2014; 16:876-83. [PMID: 24899363 PMCID: PMC4446702 DOI: 10.1080/10286020.2014.918109] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
One new alkaloid, 4-geissoschizine N-oxide methyl ether (1), was isolated from the EtOH extract of the hook-bearing branch of Uncariarhynchophylla, together with 10 known alkaloids, 3-epi-geissoschizine methyl ether (2) isolated from U.rhynchophylla for the first time, geissoschizine methyl ether (3), 4-hirsuteine N-oxide (4), hirsuteine (5), hirsutine (6), 3α-dihydro-cadambine (7), 3β-isodihydro-cadambine (8), cadambine (9), strictosamide (10), and akuammigine (11). The structures were elucidated by spectroscopic methods including UV, ESI-QTOF MS, NMR, and circular dichroism experiments. Neuroprotective effects of 1-9 were investigated against 3 mM glutamate-induced HT22 cell death. The activity assay showed that 2, 3, 5, and 6 exhibited potent neuroprotective effects against glutamate-induced HT22 cell death. However, only weak neuroprotective activities were observed for 1, 4, 7, 8, and 9.
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Affiliation(s)
- Wen Qi
- Department of Traditional Chinese Medicines, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Si-Jia Yue
- Department of Traditional Chinese Medicines, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Jia-Hong Sun
- Department of Physiology and Pharmacology, Center for Basic and Translational Stroke Research, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA
| | - James W. Simpkins
- Department of Physiology and Pharmacology, Center for Basic and Translational Stroke Research, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA
| | - Lin Zhang
- Department of Traditional Chinese Medicines, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Dan Yuan
- Department of Traditional Chinese Medicines, Shenyang Pharmaceutical University, Shenyang 110016, China
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24
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Biologically Active Compounds from the Genus Uncaria (Rubiaceae). STUDIES IN NATURAL PRODUCTS CHEMISTRY 2014. [DOI: 10.1016/b978-0-444-63430-6.00013-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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25
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Vasodilator compounds derived from plants and their mechanisms of action. Molecules 2013; 18:5814-57. [PMID: 23685938 PMCID: PMC6270466 DOI: 10.3390/molecules18055814] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 04/24/2013] [Accepted: 05/07/2013] [Indexed: 12/31/2022] Open
Abstract
The present paper reviews vasodilator compounds isolated from plants that were reported in the past 22 years (1990 to 2012) and the different mechanisms of action involved in their vasodilator effects. The search for reports was conducted in a comprehensive manner, intending to encompass those metabolites with a vasodilator effect whose mechanism of action involved both vascular endothelium and arterial smooth muscle. The results obtained from our bibliographic search showed that over half of the isolated compounds have a mechanism of action involving the endothelium. Most of these bioactive metabolites cause vasodilation either by activating the nitric oxide/cGMP pathway or by blocking voltage-dependent calcium channels. Moreover, it was found that many compounds induced vasodilation by more than one mechanism. This review confirms that secondary metabolites, which include a significant group of compounds with extensive chemical diversity, are a valuable source of new pharmaceuticals useful for the treatment and prevention of cardiovascular diseases.
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26
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Wu X, Liu Q, Fang H, Chen J, Cao W, Zhao G. Enantioselective Organocatalyzed Cascade Reactions to Highly Functionalized Spirotetracyclic Indolenines and Oxindoles. Chemistry 2012; 18:12196-201. [DOI: 10.1002/chem.201202240] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Indexed: 11/11/2022]
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27
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Vasorelaxant effects on rat aortic artery by two types of indole alkaloids, naucline and cadamine. J Nat Med 2012; 67:399-403. [PMID: 22833406 DOI: 10.1007/s11418-012-0689-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Accepted: 06/28/2012] [Indexed: 01/28/2023]
Abstract
Two indole alkaloids, naucline from Nauclea officinalis and cadamine from Ochreinauclea maingayii, were individually evaluated for vasorelaxant effects on phenylephrine-precontracted aortic rings. Naucline induced concentration-dependent relaxation in aortic rings. Respective EC50 values of naucline on aorta rings with/without endothelium did not show a significant difference, indicating that naucline-induced relaxation was independent of the endothelium. In further experiments with various inhibitors, naucline was found to possess inhibitory effects on both voltage-dependent Ca(2+) channel (VDC)- and receptor-operated Ca(2+) channel (ROC)-dependent Ca(2+) influx in smooth muscle. Cadamine showed concentration-dependent relaxation in endothelium-intact aortic rings, which was inhibited by addition of L-NMMA, NOS inhibitor. These results suggested that the vasorelaxant effect of cadamine is partly mediated through the increased release of NO from endothelial cells. In addition to NO involvement, vasorelaxation induced by cadamine was also attributed to inhibition of both VDC- and ROC-dependent Ca(2+) influx.
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28
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Analysis of alkaloids from different chemical groups by different liquid chromatography methods. OPEN CHEM 2012. [DOI: 10.2478/s11532-012-0037-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AbstractAlkaloids are biologically active compounds widely used as pharmaceuticals and synthesised as secondary methabolites in plants. Many of these compounds are strongly toxic. Therefore, they are often subject of scientific interests and analysis. Since alkaloids — basic compounds appear in aqueous solutions as ionized and unionized forms, they are difficult for chromatographic separation for peak tailing, poor systems efficiency, poor separation and poor column-to-column reproducibility. For this reason it is necessity searching of more suitable chromatographic systems for analysis of the compounds. In this article we present an overview on the separation of selected alkaloids from different chemical groups by liquid chromatography thus indicating the range of useful methods now available for alkaloid analysis. Different selectivity, system efficiency and peaks shape may be achieved in different LC methods separations by use of alternative stationary phases: silica, alumina, chemically bonded stationary phases, cation exchange phases, or by varying nonaqueous or aqueous mobile phase (containing different modifier, different buffers at different pH, ion-pairing or silanol blocker reagents). Developments in TLC (NP and RP systems), HPLC (NP, RP, HILIC, ion-exchange) are presented and the advantages of each method for alkaloids analysis are discussed.
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29
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Arai H, Zaima K, Mitsuta E, Tamamoto H, Saito A, Hirasawa Y, Rahman A, Kusumawati I, Zaini NC, Morita H. Alstiphyllanines I-O, ajmaline type alkaloids from Alstonia macrophylla showing vasorelaxant activity. Bioorg Med Chem 2012; 20:3454-9. [PMID: 22560833 DOI: 10.1016/j.bmc.2012.04.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Revised: 04/04/2012] [Accepted: 04/06/2012] [Indexed: 10/28/2022]
Abstract
Seven new ajmaline type alkaloids, alstiphyllanines I-O (1-7) were isolated from the leaves of Alstonia macrophylla together with six related alkaloids (8-13). Structures and stereochemistry of 1-7 were fully elucidated and characterized by 2D NMR analysis. A series of alstiphyllanines I-O (1-7) as well as the known ajmaline type alkaloids (8-13) showed that they relaxed phenylephrine (PE)-induced contractions against rat aortic ring. Among them, vincamedine (10) showed potent vasorelaxant activity, which may be mediated through inhibition of Ca(2+) influx through voltage-dependent Ca(2+) channels (VDCs) and/or receptor-operated Ca(2+) channels (ROCs) as well as partially mediated the NO release from endothelial cells. The presence of substituents at both N-1 and C-17 may be important to show vasorelaxation activity.
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Affiliation(s)
- Hiroko Arai
- Faculty of Pharmaceutical Sciences, Hoshi University, Shinagawa, Tokyo 142-8501, Japan
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