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Chen SQ, Jia J, Hu JY, Wu J, Sun WT, Zheng M, Wang X, Zhu KK, Jiang CS, Yang SP, Zhang J, Wang SB, Cai YS. Iboga-type alkaloids with Indolizidino[8,7-b]Indole scaffold and bisindole alkaloids from Tabernaemontana bufalina Lour. PHYTOCHEMISTRY 2022; 196:113089. [PMID: 35074605 DOI: 10.1016/j.phytochem.2022.113089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 01/08/2022] [Accepted: 01/09/2022] [Indexed: 06/14/2023]
Abstract
Phytochemical investigation on the aerial parts of Tabernaemontana bufalina Lour. (Apocynaceae) led to the identification of four undescribed monoterpenoid indole alkaloids named taberbufamines A-D, an undescribed natural product, and fourteen known indole alkaloids. The structures of the undescribed alkaloids were established by spectroscopic and computational methods, and their absolute configurations were further determined by quantum chemical TDDFT calculations and the experimental ECD spectra. Taberbufamines A and B possessed an uncommon skeleton incorporating an indolizidino [8,7-b]indole motif with a 2-hydroxymethyl-butyl group attached at the pyrrolidine ring. Biosynthetically, Taberbufamines A and B might be derived from iboga-type alkaloid through rearrangement. Vobatensine C showed significant bioactivity against A-549, Bel-7402, and HCT-116 cells with IC50 values of 2.61, 1.19, and 1.74 μM, respectively. Ervahanine A showed antimicrobial activity against Bacillus subtilis, Mycobacterium smegmatis, and Helicobacter pylori with MIC values of 4, 8, and 16 μg/mL, respectively. 19(S)-hydroxyibogamine was shown as butyrylcholinesterase inhibitor (IC50 of 20.06 μM) and α-glycosidase inhibitor (IC50 of 17.18 μM), while tabernamine, ervahanine B, and ervadivaricatine B only showed α-glycosidase inhibitory activities with IC50 values in the range of 0.95-4.61 μM.
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Affiliation(s)
- Shun-Qing Chen
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Jia Jia
- Department of Pathogen Biology & Jiangsu Key Laboratory of Pathogen Biology & Helicobacter Pylori Research Centre, Nanjing Medical University, Nanjing, 211166, People's Republic of China
| | - Jing-Yao Hu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Jun Wu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Wen-Ting Sun
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Mingxin Zheng
- Department of Pathogen Biology & Jiangsu Key Laboratory of Pathogen Biology & Helicobacter Pylori Research Centre, Nanjing Medical University, Nanjing, 211166, People's Republic of China
| | - Xi Wang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Kong-Kai Zhu
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China
| | - Cheng-Shi Jiang
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, People's Republic of China
| | - Sheng-Ping Yang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Juan Zhang
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, People's Republic of China.
| | - Shou-Bao Wang
- Beijing Key Laboratory of Drug Targets Identification and Drug Screening, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, People's Republic of China.
| | - You-Sheng Cai
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China.
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Major Bioactive Alkaloids and Biological Activities of Tabernaemontana Species (Apocynaceae). PLANTS 2021; 10:plants10020313. [PMID: 33562893 PMCID: PMC7915066 DOI: 10.3390/plants10020313] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/24/2021] [Accepted: 01/29/2021] [Indexed: 01/28/2023]
Abstract
Several species belonging to the genus Tabernaemontana have been well researched and utilized for their wide-ranging biological activities. A few of the most prominent species include Tabernaemontana divaricata, Tabernaemontana catharinensis, Tabernaemontana crassa, and Tabernaemontana elegans. These species and many others within the genus often display pharmacological importance, which is habitually related to their chemical constituents. The secondary metabolites within the genus have demonstrated huge medicinal potential for the treatment of infections, pain, injuries, and various diseases. Regardless of the indispensable reports and properties displayed by Tabernaemontana spp., there remains a wide variety of plants that are yet to be considered or examined. Thus, an additional inclusive study on species within this genus is essential. The current review aimed to extensively analyze, collate, and describe an updated report of the current literature related to the major alkaloidal components and biological activities of species within the genus Tabernaemontana.
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Mahomoodally F, Abdallah HH, Suroowan S, Jugreet S, Zhang Y, Hu X. In silico Exploration of Bioactive Phytochemicals Against Neurodegenerative Diseases Via Inhibition of Cholinesterases. Curr Pharm Des 2021; 26:4151-4162. [PMID: 32178608 DOI: 10.2174/1381612826666200316125517] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Accepted: 03/09/2020] [Indexed: 02/07/2023]
Abstract
Neurodegenerative disorders are estimated to become the second leading cause of death worldwide by 2040. Despite the widespread use of diverse allopathic drugs, these brain-associated disorders can only be partially addressed and long term treatment is often linked with dependency and other unwanted side effects. Nature, believed to be an arsenal of remedies for any illness, presents an interesting avenue for the development of novel neuroprotective agents. Interestingly, inhibition of cholinesterases, involved in the breakdown of acetylcholine in the synaptic cleft, has been proposed to be neuroprotective. This review therefore aims to provide additional insight via docking studies of previously studied compounds that have shown potent activity against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) in vitro. Indeed, the determination of potent plant-based ligands for this purpose through in silico methods enables the elimination of lengthy and costly traditional methods of drug discovery. Herein, a literature search was conducted to identify active phytochemicals which are cholinesterase inhibitors. Following which in silico docking methods were applied to obtain docking scores. Compound structures were extracted from online ZINC database and optimized using AM1 implemented in gaussian09 software. Noteworthy ligands against AChE highlighted in this study include: 19,20-dihydroervahanine A and 19, 20-dihydrotabernamine. Regarding BChE inhibition, the best ligands were found to be 8-Clavandurylkaempferol, Na-methylepipachysamine D; ebeiedinone; and dictyophlebine. Thus, ligand optimization between such phytochemicals and cholinesterases coupled with in vitro, in vivo studies and randomized clinical trials can lead to the development of novel drugs against neurodegenerative disorders.
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Affiliation(s)
- Fawzi Mahomoodally
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
| | - Hassan H Abdallah
- Chemistry Department, College of Education, Salahaddin University, 44002 Erbil, Iraq
| | - Shanoo Suroowan
- Department of Health Sciences, Faculty of Science, University of Mauritius, Mauritius
| | - Sharmeen Jugreet
- Department of Health Sciences, Faculty of Science, University of Mauritius, Mauritius
| | - Yansheng Zhang
- Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai, 200444, China
| | - Xuebo Hu
- College of Plant Sciences and Technology, Huazhong Agricultural University, Wuhan, China
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Mohammed AE, Abdul-Hameed ZH, Alotaibi MO, Bawakid NO, Sobahi TR, Abdel-Lateff A, Alarif WM. Chemical Diversity and Bioactivities of Monoterpene Indole Alkaloids (MIAs) from Six Apocynaceae Genera. Molecules 2021; 26:488. [PMID: 33477682 PMCID: PMC7831967 DOI: 10.3390/molecules26020488] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 01/09/2021] [Accepted: 01/11/2021] [Indexed: 01/06/2023] Open
Abstract
By the end of the twentieth century, the interest in natural compounds as probable sources of drugs has declined and was replaced by other strategies such as molecular target-based drug discovery. However, in the recent times, natural compounds regained their position as extremely important source drug leads. Indole-containing compounds are under clinical use which includes vinblastine and vincristine (anticancer), atevirdine (anti-HIV), yohimbine (erectile dysfunction), reserpine (antihypertension), ajmalicine (vascular disorders), ajmaline (anti-arrhythmic), vincamine (vasodilator), etc. Monoterpene Indole Alkaloids (MIAs) deserve the curiosity and attention of researchers due to their chemical diversity and biological activities. These compounds were considered as an impending source of drug-lead. In this review 444 compounds, were identified from six genera belonging to the family Apocynaceae, will be discussed. These genera (Alstonia, Rauvolfia, Kopsia, Ervatamia, and Tabernaemontana, and Rhazya) consist of 400 members and represent 20% of Apocynaceae species. Only 30 (7.5%) species were investigated, whereas the rest are promising to be investigated. Eleven bioactivities, including antibacterial, antifungal, anti-inflammatory and immunosuppressant activities, were reported. Whereas cytotoxic effect represents 47% of the reported activities. Convincingly, the genera selected in this review are a wealthy source for future anticancer drug lead.
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Affiliation(s)
- Afrah E. Mohammed
- Department of Biology, Faculty of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia;
| | - Zainab H. Abdul-Hameed
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (Z.H.A.-H.); (N.O.B.); (T.R.S.)
| | - Modhi O. Alotaibi
- Department of Biology, Faculty of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia;
| | - Nahed O. Bawakid
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (Z.H.A.-H.); (N.O.B.); (T.R.S.)
| | - Tariq R. Sobahi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (Z.H.A.-H.); (N.O.B.); (T.R.S.)
| | - Ahmed Abdel-Lateff
- Department of Natural Products and Alternative Medicine, Faculty of Pharmacy, King Abdulaziz University, P.O. Box 80260, Jeddah 21589, Saudi Arabia;
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
| | - Walied M. Alarif
- Department of Marine Chemistry, Faculty of Marine Sciences, King Abdulaziz University, P.O. Box 80207, Jeddah 21589, Saudi Arabia
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Li F, Bi D, Liang X, Luo R, Zhuang H, Wang L. Alkaloids from the stem barks of Erythrina stricta. PHYTOCHEMISTRY 2020; 170:112220. [PMID: 31812107 DOI: 10.1016/j.phytochem.2019.112220] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 06/25/2019] [Accepted: 11/22/2019] [Indexed: 06/10/2023]
Abstract
Four previously undescribed erythrinan alkaloids, 8α-acetonylerythristemine, 8α-acetonylerysotrine, 10β-hydroxy-11β-methoxyerysotramidine and 3-epierysotrine, one undescribed pyrrolidine derivative, S-1-(4-hydroxy-3-methoxyphenethyl)-5-hydroxy pyrrolidin-2-one, and one undescribed amide, N-(3-hydroxy-4-methoxyphenethyl)-4-hydroxylbutanamide, along with thirteen known alkaloids were isolated from the stem barks of Erythrina strica Roxb. (Leguminosae). Their structures were identified by extensive analysis of physical, spectroscopic and spectrometric data. It's very interesting that the coexistence of 3-methoxytyramine, erythrinarbine, S-1-(4-hydroxy-3-methoxyphenethyl)-5-hydroxy pyrrolidin-2-one and N-(3-hydroxy-4-methoxyphenethyl)-4-hydroxylbutanamide that may be closely related in biosynthesis, supports the hypothetical biogenetic pathway of pyrrolo [2,1-a]isoquinoline alkaloids.
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Affiliation(s)
- Fengqiu Li
- Faculty of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming, 650050, PR China
| | - Dewen Bi
- Faculty of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming, 650050, PR China
| | - Xuesong Liang
- Faculty of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming, 650050, PR China
| | - Ruilong Luo
- Faculty of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming, 650050, PR China
| | - Hongdan Zhuang
- Faculty of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming, 650050, PR China
| | - Liqin Wang
- Faculty of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming, 650050, PR China.
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Synthesis and biological evaluation of indoloquinoline alkaloid cryptolepine and its bromo-derivative as dual cholinesterase inhibitors. Bioorg Chem 2019; 90:103062. [DOI: 10.1016/j.bioorg.2019.103062] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 06/04/2019] [Accepted: 06/09/2019] [Indexed: 12/20/2022]
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Cai YS, Sarotti AM, Zhou TL, Huang R, Qiu G, Tian C, Miao ZH, Mándi A, Kurtán T, Cao S, Yang SP. Flabellipparicine, a Flabelliformide-Apparicine-Type Bisindole Alkaloid from Tabernaemontana divaricata. JOURNAL OF NATURAL PRODUCTS 2018; 81:1976-1983. [PMID: 30169038 DOI: 10.1021/acs.jnatprod.8b00191] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Four new monoterpenoid bisindole alkaloids, flabellipparicine (1), 19,20-dihydrovobparicine (2), 10'-demethoxy-19,20-dihydrovobatensine D (3), and 3'-(2-oxopropyl)ervahanine A (4), and 10 known monoterpenoid indole alkaloids were isolated from the stems of Tabernaemontana divaricata. All structures were elucidated based on spectroscopic methods, and the absolute configuration of 1 was established using conformational analysis and TDDFT-ECD calculation of selected stereoisomers. Compound 1 represents the first flabelliformide-apparicine-type bisindole alkaloid, in which the flabelliformide-like unit connects to the apparicine-like unit with a C-3-C-22' bond and an N-1-C-16' bond to form an uncommon five-membered ring between the two monomers. All alkaloids were evaluated for their cytotoxicity against two human cancer cell lines, MCF-7 and A-549. Compounds 2, 4, and 14 exhibited cytotoxicity against MCF-7 and A-549 with IC50 values in the range of 2 nM to 8 μM.
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Affiliation(s)
- You-Sheng Cai
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences , Wuhan University , 185 Donghu Road , Wuhan 430071 , People's Republic of China
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy , University of Hawai'i at Hilo , 200 West Kawili Street , Hilo , Hawaii 96720 , United States
| | - Ariel M Sarotti
- Instituto de Química Rosario (CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas , Universidad Nacional de Rosario , Suipacha 531 , Rosario 2000 , Argentina
| | - Ting-Lan Zhou
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences , Wuhan University , 185 Donghu Road , Wuhan 430071 , People's Republic of China
| | - Rong Huang
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences , Wuhan University , 185 Donghu Road , Wuhan 430071 , People's Republic of China
| | - Guofu Qiu
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences , Wuhan University , 185 Donghu Road , Wuhan 430071 , People's Republic of China
| | - Congkui Tian
- Wuling Mountain Institute of Natural Medicine, Hubei University for Nationalities, Key Laboratory of Biological Resources Protection and Utilization of Hubei Province , 39 Xueyuan Road , Enshi 445000 , People's Republic of China
| | - Ze-Hong Miao
- State Key Laboratory of Drug Research Institute of Materia Medica, Chinese Academy of Sciences , Zu Chong Zhi Road 555 Zhangjiang Hi-Tech Park , Shanghai 201203 , People's Republic of China
| | - Attila Mándi
- Department of Organic Chemistry , University of Debrecen , POB 400, H-4002 Debrecen , Hungary
| | - Tibor Kurtán
- Department of Organic Chemistry , University of Debrecen , POB 400, H-4002 Debrecen , Hungary
| | - Shugeng Cao
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy , University of Hawai'i at Hilo , 200 West Kawili Street , Hilo , Hawaii 96720 , United States
| | - Sheng-Ping Yang
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences , Wuhan University , 185 Donghu Road , Wuhan 430071 , People's Republic of China
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Liu ZW, Zhang J, Li ST, Liu MQ, Huang XJ, Ao YL, Fan CL, Zhang DM, Zhang QW, Ye WC, Zhang XQ. Ervadivamines A and B, Two Unusual Trimeric Monoterpenoid Indole Alkaloids from Ervatamia divaricata. J Org Chem 2018; 83:10613-10618. [PMID: 30015492 DOI: 10.1021/acs.joc.8b01371] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ervadivamines A (1) and B (2), two unprecedented trimeric monoterpenoid indole alkaloids, were isolated from Ervatamia divaricata. They are the first examples of vobasine-iboga-vobasine-type alkaloid with both C-C and C-N linkage patterns. Their structures including absolute configurations were fully accomplished by extensive spectroscopic analysis, single-crystal X-ray diffraction, and electric circular dichroism methods. The plausible biogenetic pathways of these trimeric alkaloids were also proposed. In addition, compound 1 exhibited significant cytotoxicity against four cancer cells.
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Affiliation(s)
- Zhi-Wen Liu
- Institute of Traditional Chinese Medicine and Natural Products, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , P. R. China
| | - Jian Zhang
- Institute of Traditional Chinese Medicine and Natural Products, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , P. R. China.,State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences , University of Macau , Macao SAR , P. R. China
| | - Song-Tao Li
- Institute of Traditional Chinese Medicine and Natural Products, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , P. R. China
| | - Ming-Qun Liu
- Institute of Traditional Chinese Medicine and Natural Products, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , P. R. China
| | - Xiao-Jun Huang
- Institute of Traditional Chinese Medicine and Natural Products, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , P. R. China
| | - Yun-Lin Ao
- Institute of Traditional Chinese Medicine and Natural Products, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , P. R. China
| | - Chun-Lin Fan
- Institute of Traditional Chinese Medicine and Natural Products, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , P. R. China
| | - Dong-Mei Zhang
- Institute of Traditional Chinese Medicine and Natural Products, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , P. R. China
| | - Qing-Wen Zhang
- State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences , University of Macau , Macao SAR , P. R. China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine and Natural Products, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , P. R. China
| | - Xiao-Qi Zhang
- Institute of Traditional Chinese Medicine and Natural Products, and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , P. R. China
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Chemical Constituents of the Stems of Spatholobus parviflorus and Their Cholinesterase Inhibitory Activity. Chem Nat Compd 2018. [DOI: 10.1007/s10600-018-2344-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Ejsmond MJ, Provenza FD. Is doping of cognitive performance an anti-herbivore adaptation? Alkaloids inhibiting acetylcholinesterase as a case. Ecosphere 2018. [DOI: 10.1002/ecs2.2129] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Maciej J. Ejsmond
- Institute of Environmental Sciences; Jagiellonian University; ul. Gronostajowa 7 Kraków 30-387 Poland
- Department of Arctic Biology; The University Centre in Svalbard; Longyearbyen N-9171 Norway
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Majinda RRT. An Update of Erythrinan Alkaloids and Their Pharmacological Activities. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2018; 107:95-159. [PMID: 30178271 DOI: 10.1007/978-3-319-93506-5_2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The period of the past 5 years has witnessed a remarkable increase in all of the number, structural variety, and complexity of erythrinan alkaloids reported. This structural diversity seems to be most pronounced in the alkaloids reported from the two species Erythrina arborescens and Erythrina variegata. Between them, work-up of these taxa yielded new polymeric (dimeric and trimeric) erythrinan alkaloids, a first example in one case where a normal 6,5,6,6-membered indoloisoquinoline spirocylic core has rearranged to a spiro-fused 6,5,7,6-skeleton. Furthermore, erythrinan alkaloids with a fifth ring containing a 2H-imidazole functionality were also reported for the first time, together with some new structures having an unusual substitution and with functionalities at positions C-3 and C-7 of the erythrinan core. This contribution has included 40 more erythrinan alkaloids that are either new or were omitted in the most recent major reviews on the same topic, leading to a total of 154 known erythrinan alkaloids to date. There are a few cases where the structures of the new alkaloids are contestable due to insufficient data having been obtained on isolation. To facilitate easier reference and identification, all structures having a common core have been placed in the same table or figure in this chapter.The reported pharmacological activities of the new and known erythrinan alkaloids documented have shown a considerable bias towards central nervous system and related activities. Other prominent activities that have been reported are antifeedant, insecticidal, cytotoxic, antiprotozoal, anti-inflammatory, antioxidant, antifungal, and antiviral effects. Erythrinan alkaloids generally seem to lack antibacterial activity. Several new polymeric alkaloids were found to lack cytotoxicity against a number of human cancer cell lines, although two of them showed moderate aphicidal activity and one exhibited weak to moderate acetylcholinesterase inhibition. The biological activity of erythrinan alkaloids seems to be influenced by basic substructural requirements, such as a conjugated diene (Δ1,2, Δ6,7) system and is modulated by the presence (or absence) of other groups in rings A, B, C, and D of the erythrinan core. The erythrinan core may provide potential leads to structures that eventually may be useful therapeutically.In recent years, a number of stereoselective chemical synthesis methods have been applied towards the erythinan alkaloids, and these are described in this contribution.
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Khongsombat O, Nakdook W, Ingkaninan K. Inhibitory effects of Tabernaemontana divaricata root extract on oxidative stress and neuronal loss induced by amyloid β 25-35 peptide in mice. J Tradit Complement Med 2017; 8:184-189. [PMID: 29322008 PMCID: PMC5756015 DOI: 10.1016/j.jtcme.2017.05.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 04/12/2017] [Accepted: 05/17/2017] [Indexed: 12/31/2022] Open
Abstract
In Alzheimer's disease, there are numerous amyloid plaques, neurofibrillary tangles, and neuronal loss in several brain areas. Oxidative stress is involved in the mechanisms of Aβ-peptide induced neurotoxicity by the generation of free radical oxidative stress that may lead to neurodegeneration. Tabernaemontana divaricata has various medical properties in Thai folklore medicine including prevent forgetfulness or improve memory. The present study aimed to investigate the effects of T. divaricata root extract (TDE) on Aβ25-35 peptides induced neuronal loss and oxidative stress in mice. Male ICR mice were administered with vehicle or TDE (250, 500, and 1000 mg/kg b.w., p.o.) for 28 consecutive days. Then, these mice were given a single intracerebroventricular (i.c.v.) injection of Aβ25-35 or phosphate buffer saline (PBS) (10 μg/mouse). The novel object recognition (NOR) test was used to determine memory disturbance. In addition, the neuronal cells in the cerebral cortex and hippocampus were measured by using crystal violet staining and lipid peroxidation was determined by measuring the formation of thiobarbituric acid reactive substances. An i.c.v. injection of Aβ25-35 peptides could significantly induce memory impairment, increase level of lipid peroxidation including the neuronal loss in CA3 of hippocampus. However, the mice pretreated with TDE could prevent the memory loss, neuronal loss and decrease lipid peroxidation. These results suggest the potential therapeutic value in dementia of TDE through its antioxidant property.
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Affiliation(s)
- Onrawee Khongsombat
- Department of Physiology, Faculty of Medical Science, Naresuan University, Phitsanulok 65000, Thailand.,Center of Excellence in Medical Biotechnology, Naresuan University, Phitsanulok 65000, Thailand
| | - Walika Nakdook
- Department of Physiology, Faculty of Medical Science, Naresuan University, Phitsanulok 65000, Thailand
| | - Kornkanok Ingkaninan
- Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok 65000, Thailand
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Suh YG, Lim C, Sim J, Lee JK, Surh YJ, Paek SM. Construction of the Azacyclic Core of Tabernaemontanine-Related Alkaloids via Tandem Reformatsky-Aza-Claisen Rearrangement. J Org Chem 2017; 82:1464-1470. [PMID: 28051867 DOI: 10.1021/acs.joc.6b02648] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A divergent synthetic methodology for a tabernaemontanine-related alkaloid was developed. The synthetic route features practical improvements in the Pictet-Spengler cyclization for the tetrahydro-β-carboline intermediate and an unprecedented tandem Reformatsky-aza-Claisen rearrangement to create the core carbon skeleton and stereochemistries of tabernaemontanine-related alkaloids.
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Affiliation(s)
- Young-Ger Suh
- College of Pharmacy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Changjin Lim
- College of Pharmacy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Jaehoon Sim
- College of Pharmacy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Jae Kyun Lee
- Neuro-Medicine Center, Korea Institute of Science and Technology , P.O. Box 131, Seoul 130-650, Republic of Korea
| | - Young-Joon Surh
- Tumor Microenvironment Global Core Research Center, College of Pharmacy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Seung-Mann Paek
- College of Pharmacy, Research Institute of Pharmaceutical Science, Gyeongsang National University , Jinju daero, Jinju 660-751, Republic of Korea
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14
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Lavaud C, Massiot G. The Iboga Alkaloids. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2017; 105:89-136. [PMID: 28194562 DOI: 10.1007/978-3-319-49712-9_2] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
Iboga alkaloids are a particular class of indolomonoterpenes most often characterized by an isoquinuclidine nucleus. Their first occurrence was detected in the roots of Tabernanthe iboga, a sacred plant to the people of Gabon, which made it cult object. Ibogaine is the main representative of this class of alkaloids and its psychoactive properties are well documented. It has been proposed as a drug cessation treatment and has a wide range of activities in targeting opioids, cocaine, and alcohol. The purpose of this chapter is to provide a background on this molecule and related compounds and to update knowledge on the most recent advances made. Difficulties linked to the status of ibogaine as a drug in several countries have hampered its development, but 18-methoxycoronaridine is currently under evaluation for the same purposes and for the treatment of leishmaniasis. The chapter is divided into six parts: an introduction aiming at defining what is called an iboga alkaloid, and this is followed by current knowledge on their biosynthesis, which unfortunately remains a "black box" as far as the key construction step is concerned. Many of these alkaloids are still being discovered and the third and fourth parts of the chapter discuss the analytical tools in use for this purpose and give lists of new monomeric and dimeric alkaloids belonging to this class. When necessary, the structures are discussed especially with regard to absolute configuration determinations, which remain a point of weakness in their assignments. Part V gives an account of progress made in the synthesis, partial and total, which the authors believe is key to providing solid solutions to the industrial development of the most promising molecules. The last part of the chapter is devoted to the biological properties of iboga alkaloids, with particular emphasis on ibogaine and 18-methoxycoronaridine.
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Affiliation(s)
- Catherine Lavaud
- Faculty of Pharmacy, Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims, UMR CNRS 7312, Case postale 44, UFR des Sciences Exactes et Naturelles, BP 1039, 51687, Reims, Cedex 2, France.
| | - Georges Massiot
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims, UMR CNRS 7312, Case postale 44, UFR des Sciences Exactes et Naturelles, BP 1039, 51687, Reims, Cedex 2, France
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15
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Dey A, Mukherjee A, Chaudhury M. Alkaloids From Apocynaceae. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2017. [DOI: 10.1016/b978-0-444-63931-8.00010-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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Silveira D, de Melo AF, Magalhães P, Fonseca-Bazzo Y. Tabernaemontana Species: Promising Sources of New Useful Drugs. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2017. [DOI: 10.1016/b978-0-444-63929-5.00007-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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17
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Natural products against Alzheimer's disease: Pharmaco-therapeutics and biotechnological interventions. Biotechnol Adv 2016; 35:178-216. [PMID: 28043897 DOI: 10.1016/j.biotechadv.2016.12.005] [Citation(s) in RCA: 137] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 12/19/2016] [Accepted: 12/23/2016] [Indexed: 12/30/2022]
Abstract
Alzheimer's disease (AD) is a severe, chronic and progressive neurodegenerative disease associated with memory and cognition impairment ultimately leading to death. It is the commonest reason of dementia in elderly populations mostly affecting beyond the age of 65. The pathogenesis is indicated by accumulation of the amyloid-beta (Aβ) plaques and neurofibrillary tangles (NFT) in brain tissues and hyperphosphorylation of tau protein in neurons. The main cause is considered to be the formation of reactive oxygen species (ROS) due to oxidative stress. The current treatment provides only symptomatic relief by offering temporary palliative therapy which declines the rate of cognitive impairment associated with AD. Inhibition of the enzyme acetylcholinesterase (AChE) is considered as one of the major therapeutic strategies offering only symptomatic relief and moderate disease-modifying effect. Other non-cholinergic therapeutic approaches include antioxidant and vitamin therapy, stem cell therapy, hormonal therapy, use of antihypertensive or lipid-lowering medications and selective phosphodiesterase (PDE) inhibitors, inhibition of β-secretase and γ-secretase and Aβ aggregation, inhibition of tau hyperphosphorylation and intracellular NFT, use of nonsteroidal anti-inflammatory drugs (NSAIDs), transition metal chelators, insulin resistance drugs, etanercept, brain-derived neurotrophic factor (BDNF) etc. Medicinal plants have been reported for possible anti-AD activity in a number of preclinical and clinical trials. Ethnobotany, being popular in China and in the Far East and possibly less emphasized in Europe, plays a substantial role in the discovery of anti-AD agents from botanicals. Chinese Material Medica (CMM) involving Chinese medicinal plants has been used traditionally in China in the treatment of AD. Ayurveda has already provided numerous lead compounds in drug discovery and many of these are also undergoing clinical investigations. A number of medicinal plants either in their crude forms or as isolated compounds have exhibited to reduce the pathological features associated with AD. In this present review, an attempt has been made to elucidate the molecular mode of action of various plant extracts, phytochemicals and traditional herbal formulations investigated against AD as reported in various preclinical and clinical tests. Herbal synergism often found in polyherbal formulations were found effective to combat disease heterogeneity as found in complex pathogenesis of AD. Finally a note has been added to describe biotechnological improvement, genetic and genomic resources and mathematical and statistical techniques for empirical model building associated with anti-AD plant secondary metabolites and their source botanicals.
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Paterna A, Gomes SE, Borralho PM, Mulhovo S, Rodrigues CMP, Ferreira MJU. Vobasinyl-Iboga Alkaloids from Tabernaemontana elegans: Cell Cycle Arrest and Apoptosis-Inducing Activity in HCT116 Colon Cancer Cells. JOURNAL OF NATURAL PRODUCTS 2016; 79:2624-2634. [PMID: 27704811 DOI: 10.1021/acs.jnatprod.6b00552] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Phytochemical investigation of the roots of the African medicinal plant Tabernaemontana elegans led to the isolation of three new (1-3) and two known (4 and 5) bisindole alkaloids of the vobasinyl-iboga type. The structures of 1-3 were assigned by spectroscopic methods, mainly using 1D and 2D NMR experiments. All of the isolated compounds were evaluated for their cytotoxicity against HCT116 colon and HepG2 liver carcinoma cells by the MTS metabolism assay. Compounds 1-3 and 5 were found to be cytotoxic to HCT116 colon cancer cells, displaying IC50 values in the range 8.4 to >10 μM. However, the compounds did not display significant cytotoxicity against HepG2 cancer cells. The cytotoxicity of compounds 1-3 and 5 was corroborated using a lactate dehydrogenase assay. Hoechst staining and nuclear morphology assessment and caspase-3/7 activity assays were also performed for investigating the activity of compounds 1-3 and 5 as apoptosis inducers. The induced inhibition of proliferation of HCT116 cells by compounds 1 and 2 was associated with G1 phase arrest, while compounds 3 and 5 induced G2/M cell cycle arrest. These results showed that the new vobasinyl-iboga alkaloids 1-3 and compound 5 are strong inducers of apoptosis and cell cycle arrest in HCT116 colon cancer cells.
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Affiliation(s)
- Angela Paterna
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa , 1649-003 Lisbon, Portugal
| | - Sofia E Gomes
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa , 1649-003 Lisbon, Portugal
| | - Pedro M Borralho
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa , 1649-003 Lisbon, Portugal
| | - Silva Mulhovo
- Centro de Estudos Moçambicanos e de Etnociências (CEMEC), Faculty of Natural Sciences and Mathematics, Pedagogical University , 21402161 Maputo, Mozambique
| | - Cecília M P Rodrigues
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa , 1649-003 Lisbon, Portugal
| | - Maria-José U Ferreira
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa , 1649-003 Lisbon, Portugal
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Zhang BJ, Wu B, Bao MF, Ni L, Cai XH. New dimeric and trimeric Erythrina alkaloids from Erythrina variegata. RSC Adv 2016. [DOI: 10.1039/c6ra20530e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
HPLC-guided chromatography isolation led to five new polymeric Erythrina alkaloids, erythrivarines C–G (1–5), from the flowers of Erythrina variegata.
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Affiliation(s)
- Bing-Jie Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- Kunming 650201
- People's Republic of China
| | - Bin Wu
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- Kunming 650201
- People's Republic of China
| | - Mei-Fen Bao
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- Kunming 650201
- People's Republic of China
| | - Ling Ni
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- Kunming 650201
- People's Republic of China
| | - Xiang-Hai Cai
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- Kunming 650201
- People's Republic of China
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20
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Liu ZW, Huang XJ, Xiao HL, Liu G, Zhang J, Shi L, Jiang RW, Zhang XQ, Ye WC. New iboga-type alkaloids from Ervatamia hainanensis. RSC Adv 2016. [DOI: 10.1039/c6ra00185h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The structures and absolute configurations of seven new iboga-type alkaloids 1–7 were determined by spectroscopic data, Mosher's method, single crystal X-ray diffraction and ECD analyses.
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Affiliation(s)
- Zhi-Wen Liu
- Institute of Traditional Chinese Medicine and Natural Products
- College of Pharmacy
- Jinan University
- Guangzhou 510632
- P. R. China
| | - Xiao-Jun Huang
- Institute of Traditional Chinese Medicine and Natural Products
- College of Pharmacy
- Jinan University
- Guangzhou 510632
- P. R. China
| | - Han-Lin Xiao
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research
- Jinan University
- Guangzhou 510632
- P. R. China
| | - Guo Liu
- Institute of Traditional Chinese Medicine and Natural Products
- College of Pharmacy
- Jinan University
- Guangzhou 510632
- P. R. China
| | - Jian Zhang
- Institute of Traditional Chinese Medicine and Natural Products
- College of Pharmacy
- Jinan University
- Guangzhou 510632
- P. R. China
| | - Lei Shi
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research
- Jinan University
- Guangzhou 510632
- P. R. China
| | - Ren-Wang Jiang
- Institute of Traditional Chinese Medicine and Natural Products
- College of Pharmacy
- Jinan University
- Guangzhou 510632
- P. R. China
| | - Xiao-Qi Zhang
- Institute of Traditional Chinese Medicine and Natural Products
- College of Pharmacy
- Jinan University
- Guangzhou 510632
- P. R. China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine and Natural Products
- College of Pharmacy
- Jinan University
- Guangzhou 510632
- P. R. China
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Abstract
This chapter covers the literature on bisindole alkaloids consisting of monoterpenoid indoles, published up to June 2015. Bisindole alkaloids isolated from plants belonging to the families Apocynaceae and Loganiaceae, including Iboga-vobasine type, Aspidosperma-Aspidosperma type, eburnan-Aspidosperma type, Strychnos-Strychnos type, macroline-macroline type, and so on, are described. Some recent syntheses of monoterpenoid bisindole alkaloids are outlined as well.
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Affiliation(s)
- Mariko Kitajima
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Hiromitsu Takayama
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
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22
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Characterization and in vitro permeation study of microemulsions and liquid crystalline systems containing the anticholinesterase alkaloidal extract from Tabernaemontana divaricata. Int J Pharm 2013; 452:201-10. [DOI: 10.1016/j.ijpharm.2013.05.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 03/30/2013] [Accepted: 05/02/2013] [Indexed: 11/24/2022]
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Murray AP, Faraoni MB, Castro MJ, Alza NP, Cavallaro V. Natural AChE Inhibitors from Plants and their Contribution to Alzheimer's Disease Therapy. Curr Neuropharmacol 2013; 11:388-413. [PMID: 24381530 PMCID: PMC3744903 DOI: 10.2174/1570159x11311040004] [Citation(s) in RCA: 186] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Revised: 02/25/2013] [Accepted: 02/25/2013] [Indexed: 12/20/2022] Open
Abstract
As acetylcholinesterase (AChE) inhibitors are an important therapeutic strategy in Alzheimer's disease, efforts are being made in search of new molecules with anti-AChE activity. The fact that naturally-occurring compounds from plants are considered to be a potential source of new inhibitors has led to the discovery of an important number of secondary metabolites and plant extracts with the ability of inhibiting the enzyme AChE, which, according to the cholinergic hypothesis, increases the levels of the neurotransmitter acetylcholine in the brain, thus improving cholinergic functions in patients with Alzheimer's disease and alleviating the symptoms of this neurological disorder. This review summarizes a total of 128 studies which correspond to the most relevant research work published during 2006-2012 (1st semester) on plant-derived compounds, plant extracts and essential oils found to elicit AChE inhibition.
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Affiliation(s)
- Ana Paula Murray
- INQUISUR-CONICET, Departamento de Química, Universidad Nacional del Sur, Bahía Blanca, Argentina
- Research Member of CONICET
| | - María Belén Faraoni
- INQUISUR-CONICET, Departamento de Química, Universidad Nacional del Sur, Bahía Blanca, Argentina
- Research Member of CIC
| | - María Julia Castro
- INQUISUR-CONICET, Departamento de Química, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Natalia Paola Alza
- INQUISUR-CONICET, Departamento de Química, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Valeria Cavallaro
- INQUISUR-CONICET, Departamento de Química, Universidad Nacional del Sur, Bahía Blanca, Argentina
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Chaiyana W, Schripsema J, Ingkaninan K, Okonogi S. 3'-R/S-hydroxyvoacamine, a potent acetylcholinesterase inhibitor from Tabernaemontana divaricata. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2013; 20:543-548. [PMID: 23375813 DOI: 10.1016/j.phymed.2012.12.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Revised: 11/17/2012] [Accepted: 12/25/2012] [Indexed: 06/01/2023]
Abstract
Guided by the acetylcholinesterase inhibiting activity, the bisindole alkaloid 3'-R/S-hydroxyvoacamine was isolated from a stem extract of Tabernaemontana divaricata, a plant used in Thailand in traditional rejuvenation remedies for improving the memory. The structure of the alkaloid was elucidated by extensive use of NMR spectroscopy and the complete assignment of the (1)H and (13)C NMR spectra is reported. The alkaloid acted as a non-competitive inhibitor against AChE with an IC50 value of 7.00±1.99 μM. An HPLC method was developed for the quantitative analysis of the AChE inhibitor. It suggested that there was 12.4% (w/w) of 3'-R/S-hydroxyvoacamine in the alkaloid enriched fraction of T. divaricata stem.
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Affiliation(s)
- Wantida Chaiyana
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand
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Chaiyana W, Okonogi S. Inhibition of cholinesterase by essential oil from food plant. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2012; 19:836-839. [PMID: 22510493 DOI: 10.1016/j.phymed.2012.03.010] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 02/10/2012] [Accepted: 03/09/2012] [Indexed: 05/31/2023]
Abstract
Inhibition of cholinesterase has attracted much attention recently because of its potential for the treatment of Alzheimer's disease. In this work, the anticholinesterase activities of plant oils were investigated using Ellman's colorimetric method. The results indicate that essential oils obtained from Melissa officinalis leaf and Citrus aurantifolia leaf showed high acetylcholinesterase and butyrylcholinesterase co-inhibitory activities. C. aurantifolia leaf oil revealed in this study has an IC(50) value on acetylcholinesterase and butyrylcholinesterase of 139 ± 35 and 42 ± 5 μg/ml, respectively. GC/MS analysis revealed that the major constituents of C. aurantifolia leaf oil are monoterpenoids including limonene, l-camphor, citronellol, o-cymene and 1,8-cineole.
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Affiliation(s)
- Wantida Chaiyana
- Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand
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Khorana N, Changwichit K, Ingkaninan K, Utsintong M. Prospective acetylcholinesterase inhibitory activity of indole and its analogs. Bioorg Med Chem Lett 2012; 22:2885-8. [DOI: 10.1016/j.bmcl.2012.02.057] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Revised: 01/26/2012] [Accepted: 02/20/2012] [Indexed: 10/28/2022]
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Alper K, Reith MEA, Sershen H. Ibogaine and the inhibition of acetylcholinesterase. JOURNAL OF ETHNOPHARMACOLOGY 2012; 139:879-882. [PMID: 22200647 DOI: 10.1016/j.jep.2011.12.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 11/29/2011] [Accepted: 12/02/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Ibogaine is a psychoactive monoterpine indole alkaloid extracted from the root bark of Tabernanthe iboga Baill. that is used globally in medical and nonmedical settings to treat drug and alcohol addiction, and is of interest as an ethnopharmacological prototype for experimental investigation and pharmaceutical development. The question of whether ibogaine inhibits acetylcholinesterase (AChE) is of pharmacological and toxicological significance. MATERIALS AND METHODS AChE activity was evaluated utilizing reaction with Ellman's reagent with physostigmine as a control. RESULTS Ibogaine inhibited AChE with an IC(50) of 520±40 μM. CONCLUSIONS Ibogaine's inhibition of AChE is physiologically negligible, and does not appear to account for observations of functional effects in animals and humans that might otherwise suggest the possible involvement of pathways linked to muscarinic acetylcholine transmission.
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Affiliation(s)
- Kenneth Alper
- Department of Psychiatry, New York University School of Medicine, New York, NY 10016, USA.
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28
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Bharate SB, Manda S, Joshi P, Singh B, Vishwakarma RA. Total synthesis and anti-cholinesterase activity of marine-derived bis-indole alkaloid fascaplysin. MEDCHEMCOMM 2012. [DOI: 10.1039/c2md20076g] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Changwong N, Sabphon C, Ingkaninan K, Sawasdee P. Acetyl- and butyryl-cholinesterase inhibitory activities of mansorins and mansonones. Phytother Res 2011; 26:392-6. [PMID: 21780212 DOI: 10.1002/ptr.3576] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Revised: 05/02/2011] [Accepted: 05/04/2011] [Indexed: 11/11/2022]
Abstract
Cholinesterase (ChE) inhibitory activities of three coumarins (mansorins A-C) and five naphthoquinones (mansonone C, E, G and H) were evaluated to determine the relationships between the acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory effects and the core structures of these compounds. Among the tested compounds, mansonone E exhibited the highest ChE inhibitory activities, with IC₅₀ values in the low micromolar levels. In addition to revealing the ChE inhibitory activities of naphthoquinones for the first time, the results also revealed structure-activity relationship information that could be useful for further modification. Furthermore, the study also supports the hypothesis that mansonones are the active component in Thespesia populnea, a plant that previously has been shown to enhance memory activity in an in vivo study.
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Affiliation(s)
- Nisa Changwong
- Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Bangkok 10330, Thailand
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Chaiyana W, Saeio K, Hennink WE, Okonogi S. Corrigendum to “Characterization of potent anticholinesterase plant oil based microemulsion” [Int. J. Pharm. 401 (2010) 32–40]. Int J Pharm 2011. [DOI: 10.1016/j.ijpharm.2011.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
This review focuses on recent developments in the use of natural products as therapeutics for Alzheimer's disease. The compounds span a diverse array of structural classes and are organized according to their mechanism of action, with the focus primarily on the major hypotheses. Overall, the review discusses more than 180 compounds and summarizes 400 references.
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Affiliation(s)
- Philip Williams
- Department of Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA
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Chaiyana W, Saeio K, Hennink WE, Okonogi S. Characterization of potent anticholinesterase plant oil based microemulsion. Int J Pharm 2010; 401:32-40. [PMID: 20837121 DOI: 10.1016/j.ijpharm.2010.09.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Revised: 08/28/2010] [Accepted: 09/05/2010] [Indexed: 12/16/2022]
Abstract
In the present study, essential oils of three edible Thai plants, Cymbopogon citratus (Gramineae), Citrus hystrix (Rutaceae) and Zingiber cassumunar (Zingiberaceae) were comparatively tested for acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activities using Ellman's colorimetric method. C. citratus oil exhibited the highest activity with IC(50) values of 0.34±0.07μl/ml and 2.14±0.18μl/ml against BChE and AChE activity, respectively. It was further investigated whether microemulsions of this oil could be obtained. The effects of type of surfactant and co-surfactant as well as pH and ionic strength on the phase behavior of the oil/water system were investigated. Brij 97, Triton X-114, Tween 20 and Tween 85 were employed as surfactant whereas ethanol and hexanol were used as cosurfactants. The size analysis, electrical conductivity measurements and cholinesterase inhibition assays were done in selected microemulsion. The results revealed that the type and concentration of surfactant and co-surfactant exhibited a distinct influence on the C. citratus oil microemulsions. Moreover, the inhibitory activities of the microemulsion formulation were remarkable.
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Affiliation(s)
- Wantida Chaiyana
- Department of Pharmaceutical Science, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand
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Nakdook W, Khongsombat O, Taepavarapruk P, Taepavarapruk N, Ingkaninan K. The effects of Tabernaemontana divaricata root extract on amyloid beta-peptide 25-35 peptides induced cognitive deficits in mice. JOURNAL OF ETHNOPHARMACOLOGY 2010; 130:122-126. [PMID: 20435125 DOI: 10.1016/j.jep.2010.04.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Revised: 04/11/2010] [Accepted: 04/20/2010] [Indexed: 05/29/2023]
Abstract
UNLABELLED ETHNOPHAMACOLOGICAL RELEVANCE: Tabernaemontana divaricata (TD), a Thai medicinal herb, has been widely used as an analgesic, sedative, or a cough syrup. Moreover, it has been used in traditional rejuvenation remedies as for preventing forgetfulness and improving the memory. AIM OF STUDY The present study aimed to determine the effect of TD on Abeta25-35 peptides induced cognitive deficits and acetylcholinesterase activity in mice. MATERIALS AND METHODS Mice were pretreated with TDE (250, 500 and 1,000 mg/kg body weight) for 28 days and then received i.c.v. injection of Abeta25-35 peptides. Cognitive performance was evaluated using the Morris water maze (MWM) and step-down avoidance test. The Ellman's colorimetric method was used to investigate the levels of cortical and hippocampal AChE activity. RESULTS Abeta25-35 peptides induced the memory impairment and the increased levels of cortical and hippocampal AChE activity. The consumption of TDE significantly improved the memory impairment and attenuated the brain levels of AChE activity induced by Abeta25-35 peptides. CONCLUSIONS These findings suggest that subchronic administration of TDE might prevent the Abeta25-35 peptides induced memory deficits by decreasing the AChE activity level. Therefore TDE could potentially be one of nootropic supplements for those elderly people suffering from dementia such as the AD patients.
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Affiliation(s)
- Walika Nakdook
- Department of Physiology, Faculty of Medical Science Naresuan University, Phitsanulok 65000, Thailand
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Murebwayire S, Ingkaninan K, Changwijit K, Frédérich M, Duez P. Triclisia sacleuxii (Pierre) Diels (Menispermaceae), a potential source of acetylcholinesterase inhibitors. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.61.01.0014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Objectives
To search for compounds possibly useful for the treatment of Alzheimer's disease.
Methods
Alkaloid fractions from the roots, stems and leaves of Triclisia sacleuxii (Menispermaceae) and pure bisbenzylisoquinoline alkaloids isolated from the roots (phaeanthine, N-methylapateline, 1,2-dehydroapateline and gasabiimine) were assessed for acetylcholin-esterase inhibitory activity.
Key findings
All extracts and compounds tested inhibited acetylcholinesterase to varying degrees; the leaf tertiary alkaloid fractions and the root quaternary alkaloid fractions exhibited the strongest inhibitory potential (90% at 0.1 mg/ml). The leaf tertiary alkaloid fraction was selected for further analysis (the quaternary alkaloids, which are too polar for absorption and brain distribution, were presumed to be clinically uninteresting). TLC bioautography using Ellman's reagent allowed the detection of acetylcholinesterase inhibitors and the isolation of the major active constituent, which was identified as lindoldhamine, a one-bridged bisbenzylisoquinoline alkaloid. Lindoldhamine displayed high acetylcholinesterase inhibitory activity with a 50% inhibition concentration in the micromolar range.
Conclusions
All T. sacleuxii alkaloid fractions tested exhibited anti-acetylcholinesterase activity; isolated bisbenzylisoquinoline alkaloids showed weak-to-high inhibition depending on their structural features. Structure modification could provide interesting derivatives with enhanced anti-acetylcholinesterase activity.
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Affiliation(s)
- Sengabo Murebwayire
- Laboratory of Pharmacognosy, Bromatology and Human Nutrition, Institute of Pharmacy, Free University of Brussels (ULB), Brussels, Belgium
| | - Kornkanok Ingkaninan
- Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok, Thailand
| | - Kanokwan Changwijit
- Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok, Thailand
| | - Michel Frédérich
- Division of Pharmacognosy, Department of Pharmacy, University of Liège, Liège, Belgium
| | - Pierre Duez
- Laboratory of Pharmacognosy, Bromatology and Human Nutrition, Institute of Pharmacy, Free University of Brussels (ULB), Brussels, Belgium
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Calderón AI, Simithy J, Quaggio G, Espinosa A, López-Pérez JL, Gupta MP. Triterpenes from Warszewiczia coccinea (Rubiaceae) as Inhibitors of Acetylcholinesterase. Nat Prod Commun 2009. [DOI: 10.1177/1934578x0900401002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Seventy-six plant extracts from the Panamanian flora have been screened for acetylcholinesterase (AChE) inhibitors by thin-layer chromatography (TLC) bioautography. The most promising extracts with AChE inhibitory and free radical scavenging activities at 100 μg were those of Tabernaemontana panamensis (Markgr., Boiteau & L. Allorge) Leeuwenb., Pentagonia macrophylla Benth., and Warszewiczia coccinea (Vahl) Klotzsch. Bioguided fractionation of W. coccinea stem extract afforded two triterpenes, 3β,6β,19α-trihydroxy-urs-12-en-28-oic acid (1) and 3β,6β-dihydroxy-olean-12-en-28-oic acid (sumaresinolic acid) (2), with AChE inhibitory activity. Their structures were determined by spectroscopic methods. This is the first report of these bioactive triterpenes in W. coccinea.
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Affiliation(s)
- Angela I. Calderón
- Department of Pharmacal Sciences, Harrison School of Pharmacy, Auburn University, 4306B Walker Building, Auburn, AL 36849, USA
| | - Johayra Simithy
- Centro de Investigaciones Farmacognósticas de la Flora Panameña, CIFLORPAN, Universidad de Panamá, Apartado 0824- 00172, Panamá, R. de Panamá
| | - Giuliana Quaggio
- Centro de Investigaciones Farmacognósticas de la Flora Panameña, CIFLORPAN, Universidad de Panamá, Apartado 0824- 00172, Panamá, R. de Panamá
| | - Alex Espinosa
- Centro de Investigaciones Farmacognósticas de la Flora Panameña, CIFLORPAN, Universidad de Panamá, Apartado 0824- 00172, Panamá, R. de Panamá
| | | | - Mahabir P. Gupta
- Centro de Investigaciones Farmacognósticas de la Flora Panameña, CIFLORPAN, Universidad de Panamá, Apartado 0824- 00172, Panamá, R. de Panamá
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Lima JA, Costa RS, Epifânio RA, Castro NG, Rocha MS, Pinto AC. Geissospermum vellosii stembark: anticholinesterase activity and improvement of scopolamine-induced memory deficits. Pharmacol Biochem Behav 2009; 92:508-13. [PMID: 19463267 DOI: 10.1016/j.pbb.2009.01.024] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2008] [Revised: 12/01/2008] [Accepted: 01/28/2009] [Indexed: 11/29/2022]
Abstract
This study evaluated the cholinesterase inhibitory activity of an alkaloid-rich fraction of stembark from Geissospermum vellosii (PP), and its effect on memory tests in mice. PP inhibited rat brain and electric eel acetylcholinesterase, as well as horse serum butyrylcholinesterase in a concentration-dependent manner with mean IC(50) values of 39.3 microg/mL, 2.9 microg/mL, and 1.6 microg/mL, respectively. The main alkaloid with anticholinesterase activity in PP was isolated and identified as geissospermine. PP significantly reduced scopolamine-induced amnesia in the passive avoidance and Morris water maze tests, at 30 mg/kg i.p. (given 45 min before the test sessions). At the highest effective dose (60 mg/kg), administration of PP did not result in noticeable peripheral or central cholinergic side effects. Only after administration of 200 mg/kg, mice showed convulsions affecting the whole body followed by death. These results show that compounds present in G. vellosii stembark have anticholinesterase activity, and that they can revert cognitive deficits in a model of cholinergic hypofunction.
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Affiliation(s)
- Josélia A Lima
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal do Rio de Janeiro, 21941-909 Rio de Janeiro, RJ, Brazil.
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Acetylcholinesterase-Inhibiting Activity of Pyrrole Derivatives from a Novel Marine Gliding Bacterium, Rapidithrix thailandica. Mar Drugs 2008. [DOI: 10.3390/md6040578] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Sangnoi Y, Sakulkeo O, Yuenyongsawad S, Kanjana-opas A, Ingkaninan K, Plubrukarn A, Suwanborirux K. Acetylcholinesterase-inhibiting activity of pyrrole derivatives from a novel marine gliding bacterium, Rapidithrix thailandica. Mar Drugs 2008; 6:578-86. [PMID: 19172195 PMCID: PMC2630848 DOI: 10.3390/md20080029] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Revised: 10/03/2008] [Accepted: 10/08/2008] [Indexed: 11/25/2022] Open
Abstract
Acetylcholinesterase-inhibiting activity of marinoquinoline A (1), a new pyrroloquinoline from a novel species of a marine gliding bacterium Rapidithrix thailandica, was assessed (IC50 4.9 μM). Two related pyrrole derivatives, 3-(2′-aminophenyl)-pyrrole (3) and 2,2-dimethyl-pyrrolo-1,2-dihydroquinoline (4), were also isolated from two other strains of R. thailandica. The isolation of 3 from a natural source is reported here for the first time. Compound 4 was proposed to be an isolation artifact derived from 3. The two isolated compounds were virtually inactive in the acetylcholinesterase-inhibitory assay (enzyme inhibition < 30% at 0.1 g L−1).
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Affiliation(s)
- Yutthapong Sangnoi
- Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Hat-Yai, Songkla 90112, Thailand
| | - Oraphan Sakulkeo
- Marine Natural Products Research Unit, Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
| | - Supreeya Yuenyongsawad
- Marine Natural Products Research Unit, Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
| | - Akkharawit Kanjana-opas
- Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Hat-Yai, Songkla 90112, Thailand
- Center for Bioactive Natural Products from Marine Organisms and Endophytic Fungi (BNPME), Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand
| | - Kornkanok Ingkaninan
- Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok 65000, Thailand
- Center for Bioactive Natural Products from Marine Organisms and Endophytic Fungi (BNPME), Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand
| | - Anuchit Plubrukarn
- Marine Natural Products Research Unit, Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
- Center for Bioactive Natural Products from Marine Organisms and Endophytic Fungi (BNPME), Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand
- Author to whom correspondence should be addressed; E-mail:
| | - Khanit Suwanborirux
- Center for Bioactive Natural Products from Marine Organisms and Endophytic Fungi (BNPME), Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand
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Vieira IJ, Medeiros WL, Monnerat CS, Souza JJ, Mathias L, Braz-Filho R, Pinto AC, Sousa PM, Rezende CM, Epifanio RDA. Two fast screening methods (GC-MS and TLC-ChEI assay) for rapid evaluation of potential anticholinesterasic indole alkaloids in complex mixtures. AN ACAD BRAS CIENC 2008; 80:419-26. [DOI: 10.1590/s0001-37652008000300003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2007] [Accepted: 03/17/2008] [Indexed: 11/22/2022] Open
Abstract
The pharmacotherapyfor Alzheimer's disease (AD) includes the use of acetylcholinesterase inhibitors (AChEI). Recent investigations for novel AD therapeutic agents from plants suggested that Tabernaemontana genus is a promising source of novel anticholinesterasic indole alkaloids. In this work two fast screening techniques were combined in order to easily identify novel cholinesterase inhibitors (ChEI). Gas chromatography-mass spectrometry (GC-MS) of the less polar alkaloidic fractions obtained from the acid-base extraction of the stalk of T. laeta revealed thirteen monoindole alkaloids, four of them confirmed by co-injection with previously isolated alkaloids. The others were tentatively identified by mass fragmentation analysis. By gas chromatography with flame ionization detection (GC-FID) and using isatin as internal standard, affinisine and voachalotine were determined as major compounds. These fractions and fourteen previously isolated alkaloids, obtained from root bark of T. laeta and T. hystrix were investigated for acetyl (AChE) and butyrylcholinesterase (BuChE) inhibitory activities by the modified Ellman's method in thin layer chromatography(TLC-ChEI). Results showed selective inhibition of the alkaloids heyneanine and Nb-methylvoachalotine for BuChE, and 19-epi-isovoacristine for AChE, whereas olivacine, affinisine, ibogamine, affinine, conodurine and hystrixnineinhibited both enzymes. In addition to confirming that monoterpenoid indole alkaloids can be novel therapeutic agents for AD, this is the first report of the ChEI activity of olivacine, a pyridocarbazole alkaloid.
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Affiliation(s)
- Ivo J.C. Vieira
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Brasil
| | | | | | | | - Leda Mathias
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Brasil
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Langjae R, Bussarawit S, Yuenyongsawad S, Ingkaninan K, Plubrukarn A. Acetylcholinesterase-inhibiting steroidal alkaloid from the sponge Corticium sp. Steroids 2007; 72:682-5. [PMID: 17610922 DOI: 10.1016/j.steroids.2007.05.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2007] [Accepted: 05/16/2007] [Indexed: 11/27/2022]
Abstract
A new stigmastane-type steroidal alkaloid, 4-acetoxy-plakinamine B (1), was isolated from the Thai sponge Corticium sp. The compound was subjected to the acetylcholinesterase inhibitory activity determination to reveal a high inhibitory activity (IC(50) 3.75+/-1.69 microM). The kinetics of enzyme inhibition showed a decrease in V(max), whereas K(m) was increased, thus suggesting an unusual mixed-competitive mode of inhibition. Compound 1 is the first steroidal alkaloid bearing a stigmastane skeleton ever been reported to exhibit such good potency in the acetylcholinesterase inhibition bioassay.
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Affiliation(s)
- Roosanee Langjae
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
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