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Oladeji OS, Odelade KA, Mahal A, Obaidullah AJ, Zainul R. Systematic appraisals of naturally occurring alkaloids from medicinal plants. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024:10.1007/s00210-024-03126-3. [PMID: 38767672 DOI: 10.1007/s00210-024-03126-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 04/26/2024] [Indexed: 05/22/2024]
Abstract
Alkaloids are a complex class of biologically active compounds with a broad spectrum of health-related applications. Particularly the alkaloids of indole, steroidal, terpenoids, isoquinoline, and bisbenzylisoquinoline have been extensively investigated. Ultimately, substantial advancement has been highlighted in the investigation of chemical constituents and the therapeutic benefits of plant alkaloids, particularly during the last ten years. A total of 386 alkaloids have been isolated from over 40 families, including Apocynaceae, Annonaceae, Rubiaceae, Menispermaceae, Ranunculaceae, Buxaceae, Papaveraceae, Magnoliaceae, Rutaceae and Phyllanthaceae. This paper will investigate several alkaloids that have been isolated from botanical medicines as well as offer an in-depth analysis of their cytotoxic properties.
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Affiliation(s)
- Oluwole Solomon Oladeji
- Natural Products Research Unit, Department of Physical Sciences, College of Pure and Applied Sciences, Landmark University, Omu-Aran, PMB 1001, Nigeria
- Landmark University Sustainable Development Goals III (SDG 3), Good Health and Well-Being, Landmark University, Omu-Aran, PMB 1001, Nigeria
| | | | - Ahmed Mahal
- Department of Medical Biochemical Analysis, College of Health Technology, Cihan University-Erbil, Erbil, Kurdistan Region, Iraq
- Institut für Chemie, Universität Rostock, Albert-Einstein-Strasse 3a, 18059, Rostock, Germany
| | - Ahmad J Obaidullah
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, 11451, Riyadh, Saudi Arabia
| | - Rahadian Zainul
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang, Padang, Indonesia.
- Center for Advanced Material Processing, Artificial Intelligence, and Biophysics Informatics (CAMBIOTICS), Universitas Negeri Padang, Padang, Indonesia.
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Peng ZT, Huo HX, Chao LH, Song YL, Liu DF, Wang ZW, Zhang Y, Zhao YF, Tu PF, Zheng J, Li J. Isoquinoline alkaloids from Corydalis edulis Maxim. Exhibiting insulinotropic action. PHYTOCHEMISTRY 2023; 209:113637. [PMID: 36893825 DOI: 10.1016/j.phytochem.2023.113637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 03/02/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
Eleven undescribed isoquinoline analogues, namely edulisines A-K, along with sixteen known alkaloids, were isolated from the whole plants of Corydalis edulis. The structures of the isolated alkaloids were established on the basis of extensive spectroscopic data (1D and 2D NMR, UV, IR, and HRESIMS). Their absolute configurations were determined by single-crystal X-ray crystallographic analysis and ECD. Compounds (+)-1 and (-)-1 are a pair of undescribed isoquinoline alkaloids bearing a unique coupled pattern of coptisine and ferulic acid via Diels-Alder [4 + 2] cycloaddition, while compounds (+)-2 and (-)-2 feature benzo [1,2-d:3,4-d]bis [1,3]dioxole moiety. Compounds (+)-2, (-)-2, (-)-5, 10, 13, 15, 20, 22, and 23 significantly triggered the secretion of insulin in the HIT-T15 cells at a concentration of 40 μM.
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Affiliation(s)
- Zhi-Tian Peng
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Hui-Xia Huo
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Ling-Hui Chao
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Yue-Lin Song
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Di-Fa Liu
- State Key Laboratory of Innovative Natural Medicine and TCM Injections, Ganzhou 341000, People's Republic of China
| | - Zhang-Wei Wang
- State Key Laboratory of Innovative Natural Medicine and TCM Injections, Ganzhou 341000, People's Republic of China
| | - Yuan Zhang
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Yun-Fang Zhao
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Peng-Fei Tu
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Jiao Zheng
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China.
| | - Jun Li
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China.
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Ma QG, Tang Y, He MH, Wei RR. Antidepressant alkaloids from the rhizomes of Corydalis decumbens. Z NATURFORSCH C 2022; 77:501-507. [PMID: 35749126 DOI: 10.1515/znc-2021-0108] [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: 04/14/2021] [Accepted: 06/10/2022] [Indexed: 11/15/2022]
Abstract
Two new alkaloids (1 and 2), named 1,7-dimethoxy-2'-prenyl-1',9-dihydropyrrolo-carbazole (1) and 1,7-dimethoxy-4',5'-dimethylcyclopenta-carbazole-1',3'-dione (2), along with thirteen known alkaloids (3-15) were isolated by means of silica gel, sephadex LH-20, and semi-preparative HPLC from the CHCl3 extraction of Corydalis decumbens for the first time. Their structures were determined by NMR, MS, IR, UV, and related references. Compounds (1-15) were evaluated for their antidepressant activities by measuring inhibition of monoamine neurotransmitter reuptake in vitro. Among them, compounds 1, 2, 4, and 6 showed certain antidepressant activities.
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Affiliation(s)
- Qin-Ge Ma
- Key Laboratory of Modern Preparation of Chinese Medicine of Ministry of Education & Research Center of Natural Resources of Chinese Medicinal Materials and Ethnic Medicine, Jiangxi University of Chinese Medicine, Nanchang 330004, P. R. China
| | - Ye Tang
- Key Laboratory of Modern Preparation of Chinese Medicine of Ministry of Education & Research Center of Natural Resources of Chinese Medicinal Materials and Ethnic Medicine, Jiangxi University of Chinese Medicine, Nanchang 330004, P. R. China
| | - Mao-Hua He
- Key Laboratory of Modern Preparation of Chinese Medicine of Ministry of Education & Research Center of Natural Resources of Chinese Medicinal Materials and Ethnic Medicine, Jiangxi University of Chinese Medicine, Nanchang 330004, P. R. China
| | - Rong-Rui Wei
- Key Laboratory of Modern Preparation of Chinese Medicine of Ministry of Education & Research Center of Natural Resources of Chinese Medicinal Materials and Ethnic Medicine, Jiangxi University of Chinese Medicine, Nanchang 330004, P. R. China
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Khan H, Alam W, Alsharif KF, Aschner M, Pervez S, Saso L. Alkaloids and Colon Cancer: Molecular Mechanisms and Therapeutic Implications for Cell Cycle Arrest. Molecules 2022; 27:molecules27030920. [PMID: 35164185 PMCID: PMC8838632 DOI: 10.3390/molecules27030920] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/21/2022] [Accepted: 01/25/2022] [Indexed: 12/18/2022] Open
Abstract
Cancer is the second most fatal disease worldwide, with colon cancer being the third most prevalent and fatal form of cancer in several Western countries. The risk of acquisition of resistance to chemotherapy remains a significant hurdle in the management of various types of cancer, especially colon cancer. Therefore, it is essential to develop alternative treatment modalities. Naturally occurring alkaloids have been shown to regulate various mechanistic pathways linked to cell proliferation, cell cycle, and metastasis. This review aims to shed light on the potential of alkaloids as anti-colon-cancer chemotherapy agents that can modulate or arrest the cell cycle. Preclinical investigated alkaloids have shown anti-colon cancer activities and inhibition of cancer cell proliferation via cell cycle arrest at different stages, suggesting that alkaloids may have the potential to act as anticancer molecules.
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Affiliation(s)
- Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan;
- Correspondence: or
| | - Waqas Alam
- Department of Pharmacy, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan;
| | - Khalaf F. Alsharif
- Department of Clinical Laboratory, College of Applied Medical Science, Taif University, P.O. Box 11099,Taif 21944, Saudi Arabia;
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461, USA;
| | - Samreen Pervez
- Department of Pharmacy, Qurtuba University of Science and Information Technology, Peshawar 29050, Pakistan;
| | - Luciano Saso
- Department of Physiology and Pharmacology “Vittorio Erspamer”, Sapienza University of Rome, 00185 Rome, Italy;
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Zhao X, Zhang Y, Wang Q, Huang J, She B, Shi Q, Xiang X, Su C, Zhang L, Huang R, Song C. An integrated strategy for the establishment of a protoberberine alkaloid profile: Exploration of the differences in composition between Tinosporae radix and Fibraurea caulis. PHYTOCHEMICAL ANALYSIS : PCA 2021; 32:1131-1140. [PMID: 33876504 DOI: 10.1002/pca.3054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 03/10/2021] [Accepted: 04/07/2021] [Indexed: 06/12/2023]
Abstract
INTRODUCTION Accurate species and content identification of major active components in herbals are the guarantee of the safety and effectiveness for medical and commodity purposes. OBJECTIVES In this study, an integrated strategy used to establish the protoberberine alkaloid profile was applied to explore the differences in composition between the pieces of Tinosporae radix and Fibraurea caulis, both of which had morphological similarities. MATERIALS AND METHODS First, an in-house library including possible protoberberine alkaloids based on different substituents was predicted by systematic literature survey. Meanwhile, diagnostic fragments of protoberberine alkaloids were investigated using the corresponding standards. Second, ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC-QTOF-MS/MS) was used to obtain multidimensional mass spectral data. Then, the identifications were confirmed by targeted filter of the acquired data based on the library. RESULTS As a result, 10 protoberberine alkaloid molecules including 46 isomers were identified or characterised. The qualitative distribution and relative content of protoberberine alkaloids revealed the fundamental difference between Tinosporae radix and Fibraurea caulis. 25 alkaloids were present in both herbals, while five compounds were detected only in Tinosporae radix. Furthermore, the contents of four alkaloids in Tinosporae radix were significantly higher than those in its adulterant, Fibraurea caulis. CONCLUSION The five unique ingredients in Tinosporae radix can be used as a better indicator for distinguishing the pieces of Tinosporae radix and Fibraurea caulis. The protoberberine alkaloid profile established in this study can be applied to quality evaluation of the two herbals or other herbals containing major protoberberine alkaloids.
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Affiliation(s)
- Xueyan Zhao
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, Hubei, China
| | - Yan Zhang
- First Clinical College, Hubei University of Chinese Medicine, Wuhan, Hubei, China
| | - Quansheng Wang
- Hubei Huquan Pharmaceutical Co., Ltd., Wuhan, Hubei, China
| | - Jiaxin Huang
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, Hubei, China
| | - Bo She
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, Hubei, China
| | - Qingxin Shi
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, Hubei, China
| | - Xingliang Xiang
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, Hubei, China
| | - Chao Su
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, Hubei, China
| | - Lijun Zhang
- College of Basic Medicine, Hubei University of Chinese Medicine, Wuhan, Hubei, China
| | - Rongzeng Huang
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, Hubei, China
- Key Laboratory of Traditional Chinese Medicine Resources and Chemistry of Hubei Province, Wuhan, Hubei, China
| | - Chengwu Song
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, Hubei, China
- Key Laboratory of Traditional Chinese Medicine Resources and Chemistry of Hubei Province, Wuhan, Hubei, China
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Rabêlo SV, Araújo ECC, Costa EV, Braz-Filho R, Barison A, Santos MDFC, Oliveira GG, Tomaz JC, Rolim LA, Lopes NP, Silva MFS, Moraes MO, Pessoa CDÓ, El Aouad N, Almeida JRGS. A new N-oxide benzylisoquinoline alkaloid isolated from the leaves of atemoya ( Annona cherimola × Annona squamosa). ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2021. [DOI: 10.1515/znb-2020-0187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Phytochemical investigation of the atemoya aerial parts was carried out by LC-MS-IT and cytotoxic activities were evaluated as well. These results led to the identification of a new N-oxide alkaloid (dehydroanomuricine-N-oxide) and eight other alkaloids: scoulerine, reticuline, isocorydine, norisocorydine, asimilobine, nornuciferine, anonaine, and liriodenine. The new alkaloid dehydroanomuricine-N-oxide and anomuricine were also isolated. The structures of these compounds were determined by spectroscopic and spectrometric techniques. The cytotoxic capacity of crude methanolic extract and the alkaloidal fraction were evaluated, showing moderate cytotoxicity. The isolation and identification of these alkaloids are an important contribution to the chemotaxonomy of the genus Annona and the Annonaceae family.
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Affiliation(s)
- Suzana V. Rabêlo
- Post-Graduate Program in Biotechnology (RENORBIO) , Federal Rural University of Pernambuco , Recife , Pernambuco , Brazil
| | - Edigênia C. C. Araújo
- Center for Studies and Research of Medicinal Plants (NEPLAME) , Federal University of San Francisco Valley , Petrolina , Pernambuco , Brazil
| | - Emmanoel V. Costa
- Department of Chemistry , Federal University of Amazonas , Manaus , Amazonas , Brazil
| | - Raimundo Braz-Filho
- Department of Chemistry , Federal Rural University of Rio de Janeiro , Seropédica , Rio de Janeiro , Brazil
- State University of Norte Fluminense Darcy Ribeiro , Campos dos Goytacazes , Rio de Janeiro , Brazil
| | - Andersson Barison
- NMR Center, Federal University of Paraná , Curitiba , Paraná , Brazil
| | - Maria de F. C. Santos
- Department of Chemistry , Federal University of Sergipe , Jardim Rosa Elze , São Cristóvão , Sergipe , Brazil
| | - Gibson G. Oliveira
- Faculty of Pharmaceutical Sciences of Ribeirão Preto , University of São Paulo , Ribeirão Preto , São Paulo , Brazil
| | - José C. Tomaz
- Faculty of Pharmaceutical Sciences of Ribeirão Preto , University of São Paulo , Ribeirão Preto , São Paulo , Brazil
| | - Larissa A. Rolim
- Post-Graduate Program in Biotechnology (RENORBIO) , Federal Rural University of Pernambuco , Recife , Pernambuco , Brazil
- Center for Studies and Research of Medicinal Plants (NEPLAME) , Federal University of San Francisco Valley , Petrolina , Pernambuco , Brazil
| | - Norberto P. Lopes
- Faculty of Pharmaceutical Sciences of Ribeirão Preto , University of São Paulo , Ribeirão Preto , São Paulo , Brazil
| | - Maria F. S. Silva
- National Laboratory of Experimental Oncology (LabNOE) , Federal University of Ceará , Fortaleza , Ceará , Brazil
| | - Manoel O. Moraes
- National Laboratory of Experimental Oncology (LabNOE) , Federal University of Ceará , Fortaleza , Ceará , Brazil
| | - Cláudia do Ó Pessoa
- National Laboratory of Experimental Oncology (LabNOE) , Federal University of Ceará , Fortaleza , Ceará , Brazil
| | - Noureddine El Aouad
- Research Team on Biological Engineering, Agrifood and Aquaculture, Polydisciplinary Faculty of Larache , University Abdelmalek Essaadi , Route de Rabat , Larache 92000 , Morocco
| | - Jackson R. G. S. Almeida
- Post-Graduate Program in Biotechnology (RENORBIO) , Federal Rural University of Pernambuco , Recife , Pernambuco , Brazil
- Center for Studies and Research of Medicinal Plants (NEPLAME) , Federal University of San Francisco Valley , Petrolina , Pernambuco , Brazil
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Deng AP, Zhang Y, Zhou L, Kang CZ, Lv CG, Kang LP, Nan TG, Zhan ZL, Guo LP, Huang LQ. Systematic review of the alkaloid constituents in several important medicinal plants of the Genus Corydalis. PHYTOCHEMISTRY 2021; 183:112644. [PMID: 33429352 DOI: 10.1016/j.phytochem.2020.112644] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 12/21/2020] [Accepted: 12/21/2020] [Indexed: 06/12/2023]
Abstract
The genus Corydalis is a botanical source of various pharmaceutically active components. Its member species have been widely used in traditional medicine systems in Southeast Asia, especially in China for thousands of years. They have been administered to treat the common cold, hypertension, hepatitis, hemorrhage, edema, gastritis, cardiovascular and cerebrovascular diseases, and neurological disorders. Analgesia is the most important effect of Corydalis products, which are relatively non-addictive and associated with low tolerance compared with other analgesics. Certain Corydalis species are rich in alkaloids, which have strong biological activity, and also contain coumarins, flavonoids, steroids, organic acids and other chemical components. These constituents have pharmacological efficacy against diseases of the nervous, cardiovascular and digestive systems. Numerous investigations have been performed on these plants and their components. Here, we systemically summarized the chemical constituents of important medicinal member species of Corydalis that have been reported since 1962. A total 381 alkaloids were enumerated, including 117 quaternary isoquinoline type, 60 Benzophenanthridine type, 37 aporphine type, 10 protopine type, 59 phthalide isoquinoline type, 52 simple isoquinoline-type, 25 lignin amides and 21 other alkaloids. Thus, we have provided a basis for further explorations into the pharmacologically active constituents of Corydalissp.(Papaveraceae) to develop medicines that exert strong effects, are relatively non-addictive, and result in few side effects.
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Affiliation(s)
- Ai-Ping Deng
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China; Joint Laboratory of Infinitus Quality Study of Chinese Herbal Medicine and National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Yue Zhang
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Li Zhou
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China; Joint Laboratory of Infinitus Quality Study of Chinese Herbal Medicine and National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Chuan-Zhi Kang
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China; Joint Laboratory of Infinitus Quality Study of Chinese Herbal Medicine and National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Chao-Gen Lv
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China; Joint Laboratory of Infinitus Quality Study of Chinese Herbal Medicine and National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Li-Ping Kang
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Tie-Gui Nan
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Zhi-Lai Zhan
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China; Joint Laboratory of Infinitus Quality Study of Chinese Herbal Medicine and National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Lan-Ping Guo
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China; Joint Laboratory of Infinitus Quality Study of Chinese Herbal Medicine and National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
| | - Lu-Qi Huang
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China; Joint Laboratory of Infinitus Quality Study of Chinese Herbal Medicine and National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
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Xia J, Liu Y, Zhou Y, Zhang J, Li C, Yin X, Tian X, Zhang X. Two novel alkaloids from Corydalis curviflora Maxim. and their insecticidal activity. PEST MANAGEMENT SCIENCE 2020; 76:2360-2367. [PMID: 32020760 DOI: 10.1002/ps.5772] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 01/02/2020] [Accepted: 02/04/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND Botanical pesticide plays an essential role in the control of agricultural pests. Corydalis curviflora Maxim. is used as a cholagogue and larvicide in the rural areas of Northwest China. In this study, our objective was to identify the insect active ingredients of C. curviflora extract. RESULTS Bioassay-guided isolation of the high active fraction led to the identification of two novel N-demethyl hexahydrobenzophenanthridine-type alkaloids, Curviflorain A (1) and Curviflorain B (2), together with nine known alkaloids, ambiguanine A (3), ambiguanine B (4), ambiguanine C (5), 6-acetylambinine (6), 1,1-dimethyl-6-methoxy-7-hydroxyl-1,2,3,4-tetrahydroisoquinoline (7), hendersine B (8), coryximine (9), isochotensine (10) and corysolidine (11). Compounds 1, 2, and 6 showed promising activity to the larvae of Culex pipiens pallens Coq. and Aedes albopictus Skuse. These compounds were also tested against the insect pests, Mythimna separata walker. and Schizaphis graminum Rondani. CONCLUSION These findings provide a better understanding of the insecticidal activity of C. curviflora extract and the active compounds. This has the potential to lead to a more effective botanical insecticide.
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Affiliation(s)
- JianKai Xia
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, China
| | - Yao Liu
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, China
| | - Yu Zhou
- Research and Development Center of Biorational Pesticide, Northwest A&F University, Yangling, Shaanxi, China
| | - JiaYao Zhang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, China
| | - ChunHuan Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, China
| | - Xia Yin
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, China
| | - XiangRong Tian
- Research and Development Center of Biorational Pesticide, Northwest A&F University, Yangling, Shaanxi, China
| | - XiuYun Zhang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, China
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Zhang CL, Huang QL, Zhu Q, He J, Chen J, Zhang F, Cao ZY. Alkaloids from Corydalis decumbens modulate neuronal excitability. Bioorg Chem 2020; 99:103795. [DOI: 10.1016/j.bioorg.2020.103795] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 03/19/2020] [Accepted: 03/23/2020] [Indexed: 10/24/2022]
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Schütz R, Müller M, Gerndt S, Bartel K, Bracher F. Racemic total synthesis and evaluation of the biological activities of the isoquinoline–benzylisoquinoline alkaloid muraricine. Arch Pharm (Weinheim) 2020; 353:e2000106. [DOI: 10.1002/ardp.202000106] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 04/25/2020] [Indexed: 01/01/2023]
Affiliation(s)
- Ramona Schütz
- Department of Pharmacy, Center for Drug ResearchLudwig‐Maximilians‐University of Munich Munich Germany
| | - Martin Müller
- Department of Pharmacy, Center for Drug ResearchLudwig‐Maximilians‐University of Munich Munich Germany
| | - Susanne Gerndt
- Department of Pharmacy, Center for Drug ResearchLudwig‐Maximilians‐University of Munich Munich Germany
| | - Karin Bartel
- Department of Pharmacy, Center for Drug ResearchLudwig‐Maximilians‐University of Munich Munich Germany
| | - Franz Bracher
- Department of Pharmacy, Center for Drug ResearchLudwig‐Maximilians‐University of Munich Munich Germany
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Petruczynik A, Plech T, Tuzimski T, Misiurek J, Kaproń B, Misiurek D, Szultka-Młyńska M, Buszewski B, Waksmundzka-Hajnos M. Determination of Selected Isoquinoline Alkaloids from Mahonia Aquifolia; Meconopsis Cambrica; Corydalis Lutea; Dicentra Spectabilis; Fumaria Officinalis; Macleaya Cordata Extracts by HPLC-DAD and Comparison of Their Cytotoxic Activity. Toxins (Basel) 2019; 11:toxins11100575. [PMID: 31581717 PMCID: PMC6832497 DOI: 10.3390/toxins11100575] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 09/23/2019] [Accepted: 09/28/2019] [Indexed: 12/12/2022] Open
Abstract
Alkaloids have protective functions for plants and can play an important role in living organisms. Alkaloids may have a wide range of pharmacological activities. Many of them have cytotoxic activity. Nowadays, cancer has become a serious public health problem. Searching for effective drugs with anticancer activity is one of the most significant challenges of modern scientific research. The aim of this study was the investigation of cytotoxic activity of extracts obtained from Corydalis lutea root and herb, Dicentra spectabilis root and herb, Fumaria officinalis, Macleaya cordata leaves and herb, Mahonia aquifolia leaves and cortex, Meconopsis cambrica root and herb on FaDu, SCC-25, MCF-7, and MDA-MB-231 cancer cell lines. The cytotoxic activity of these extracts has not been previously tested for these cell lines. The aim was also to quantify selected alkaloids in the investigated extracts by High Performance Liquid Chromatography (HPLC). The analyses of alkaloid content were performed using HPLC in reversed phase (RP) mode using Polar RP column and mobile phase containing acetonitrile, water and ionic liquid (IL). Cytotoxic effect of the tested plant extracts and respective alkaloid standards were examined using human pharyngeal squamous carcinoma cells (FaDu), human tongue squamous carcinoma cells (SCC-25), human breast adenocarcinoma cell line (MCF-7), human triple-negative breast adenocarcinoma cell line (MDA-MB-231). All investigated plant extracts possess cytotoxic activity against tested cancer cell lines: FaDu, SCC-25, MCF-7, and MDA-MB-231. The highest cytotoxic activity against FaDu, SCC-25, and MCF-7 cell lines was estimated for Macleaya cordata leaf extract, while the highest cytotoxic activity against MDA-MB-231 cell line was obtained for Macleaya cordata herb extract. Differences in cytotoxic activity were observed for extracts obtained from various parts of investigated plants. In almost all cases the cytotoxic activity of investigated plant extracts, especially at the highest concentration against tested cell lines was significantly higher than the activity of anticancer drug etoposide. Our investigations exhibit that these plant extracts can be recommended for further in vivo experiments to confirm their anticancer activity.
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Affiliation(s)
- Anna Petruczynik
- Department of Inorganic Chemistry, Medical University of Lublin, Chodźki 4a 20-093 Lublin, Poland.
| | - Tomasz Plech
- Department of Pharmacology, Medical University of Lublin, Chodźki 4a 20-093 Lublin, Poland.
| | - Tomasz Tuzimski
- Department of Physical Chemistry, Medical University of Lublin, Chodźki 4a 20-093 Lublin, Poland.
| | - Justyna Misiurek
- Department of Inorganic Chemistry, Medical University of Lublin, Chodźki 4a 20-093 Lublin, Poland.
| | - Barbara Kaproń
- Department of Clinical Genetics, Medical University of Lublin, Radziwiłłowska 11, 20-080 Lublin, Poland.
| | - Dorota Misiurek
- Botanical Garden of Maria Curie-Skłodowska University in Lublin, Sławinkowska 3, 20-810 Lublin, Poland.
| | - Małgorzata Szultka-Młyńska
- Department of Environmental Chemistry and Bioanalytics, Nicolaus Copernicus University, Faculty of Chemistry Gagarina 7, PL-87-100 Torun, Poland.
| | - Bogusław Buszewski
- Department of Environmental Chemistry and Bioanalytics, Nicolaus Copernicus University, Faculty of Chemistry Gagarina 7, PL-87-100 Torun, Poland.
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Zhang J, Zhang C, Xu FC, Zhang QY, Tu PF, Liang H. Cholinesterase inhibitory isoquinoline alkaloids from Corydalis mucronifera. PHYTOCHEMISTRY 2019; 159:199-207. [PMID: 30634082 DOI: 10.1016/j.phytochem.2018.11.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 11/30/2018] [Accepted: 11/30/2018] [Indexed: 06/09/2023]
Abstract
Eight previously undescribed isoquinoline alkaloids, mucroniferanines H-M, together with 16 known isoquinoline alkaloids, were isolated from Corydalis mucronifera Maxim.. The structures of the previously undescribed compounds were elucidated by interpretation of 1D and 2D NMR spectroscopic and HRMS data, and their absolute configurations were established by computational electronic circular dichroism (ECD) calculations and X-ray diffraction data. Mucroniferanine L is reported as the first natural amide bond linked isoquinoline alkaloid dimer. The isolated compounds were evaluated for AChE and BuChE inhibitory activities and mucroniferanine H showed significant activities with IC50 values of 2.31 μM and 36.71 μM, respectively.
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Affiliation(s)
- Jun Zhang
- Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, 100191, People's Republic of China
| | - Chen Zhang
- Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, 100191, People's Republic of China
| | - Fu-Chun Xu
- Medical College of Tibet University, Lhasa, 850000, People's Republic of China
| | - Qing-Ying Zhang
- Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, 100191, People's Republic of China
| | - Peng-Fei Tu
- Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, 100191, People's Republic of China
| | - Hong Liang
- Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, 100191, People's Republic of China.
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Rao PC, Begum S, Sahai M, Sriram DS. Coptisine-induced cell cycle arrest at G2/M phase and reactive oxygen species-dependent mitochondria-mediated apoptosis in non-small-cell lung cancer A549 cells. Tumour Biol 2017; 39:1010428317694565. [PMID: 28351307 DOI: 10.1177/1010428317694565] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
This study aimed to explore the effect of coptisine on non-small-cell lung cancer and its mechanism through various in vitro cellular models (A549). Results claimed significant inhibition of proliferation by coptisine against A549, H460, and H2170 cells with IC50 values of 18.09, 29.50, and 21.60 µM, respectively. Also, coptisine exhibited upregulation of pH2AX, cell cycle arrest at G2/M phase, and downregulation of the expression of cyclin B1, cdc2, and cdc25C and upregulation of p21 dose dependently. Furthermore, induction of apoptosis in A549 cells by coptisine was characterized by the activation of caspase 9, caspase 8, and caspase 3, and cleavage of poly adenosine diphosphate ribose polymerase. In addition, coptisine was found to increase reactive oxygen species generation, upregulate Bax/Bcl-2 ratio, disrupt mitochondrial membrane potential, and cause cytochrome c release into the cytosol. Besides, treatment with a reactive oxygen species inhibitor (N-acetyl cysteine) abrogated coptisine-induced growth inhibition, apoptosis, reactive oxygen species generation, and mitochondrial dysfunction. Thus, the mediation of reactive oxygen species in the apoptosis-induced effect of coptisine in A549 cells was corroborated. These findings have offered new insights into the effect and mechanisms of action of coptisine against non-small-cell lung cancer.
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Affiliation(s)
- Poorna Chandra Rao
- 1 Department of Pharmacy, Birla Institute of Technology and Science - Pilani, Hyderabad, India
| | - Sajeli Begum
- 1 Department of Pharmacy, Birla Institute of Technology and Science - Pilani, Hyderabad, India
| | - Mahendra Sahai
- 2 Department of Medicinal Chemistry, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
| | - D Saketh Sriram
- 3 Biological Research Department, Incozen Therapeutics Pvt. Ltd., Hyderabad, India
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Kim YJ, Lim HS, Kim Y, Lee J, Kim BY, Jeong SJ. Neuroprotective Effect of Corydalis ternata Extract and Its Phytochemical Quantitative Analysis. Chem Pharm Bull (Tokyo) 2017; 65:826-832. [DOI: 10.1248/cpb.c17-00300] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yu Jin Kim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine
- College of Pharmacy, Chungnam National University
| | - Hye-Sun Lim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine
| | - Yoonju Kim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine
| | - Jun Lee
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine
- Korean Medicine of Life Science, University of Science & Technology
| | - Bu-Yeo Kim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine
| | - Soo-Jin Jeong
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine
- Korean Medicine of Life Science, University of Science & Technology
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15
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Kim JH, Ryu YB, Lee WS, Kim YH. Neuraminidase inhibitory activities of quaternary isoquinoline alkaloids from Corydalis turtschaninovii rhizome. Bioorg Med Chem 2014; 22:6047-52. [PMID: 25277281 DOI: 10.1016/j.bmc.2014.09.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 09/01/2014] [Accepted: 09/02/2014] [Indexed: 10/24/2022]
Abstract
Clostridium perfringens is a Gram-positive spore-forming bacterium that causes food poisoning. The neuraminidase (NA) protein of C. perfringens plays a pivotal role in bacterial proliferation and is considered a novel antibacterial drug target. Based on screens for novel NA inhibitors, a 95% EtOH extract of Corydalis turtschaninovii rhizome showed NA inhibitory activity (68% at 30 μg/ml), which resulted in the isolation of 10 isoquinoline alkaloids; namely, palmatine (1), berberine (2), coptisine (3), pseudodehydrocorydaline (4), jatrorrhizine (5), dehydrocorybulbine (6), pseudocoptisine (7), glaucine (8), corydaline (9) and tetrahydrocoptisine (10). Interestingly, seven quaternary isoquinoline alkaloids 1-7 (IC50 = 12.8 ± 1.5 to 65.2 ± 4.5 μM) showed stronger NA inhibitory activity than the tertiary alkaloids 8-10. In addition, highly active compounds 1 and 2 showed reversible non-competitive behavior based on a kinetic study. Molecular docking simulations using the Autodock 4.2 software increased our understanding of receptor-ligand binding of these compounds. In addition, we demonstrated that compounds 1 and 2 suppressed bacterial growth.
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Affiliation(s)
- Jang Hoon Kim
- College of Pharmacy, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Young Bae Ryu
- Infection Control Material Research Center and AI Control Material Research Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup 580-185, Republic of Korea
| | - Woo Song Lee
- Infection Control Material Research Center and AI Control Material Research Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup 580-185, Republic of Korea.
| | - Young Ho Kim
- College of Pharmacy, Chungnam National University, Daejeon 305-764, Republic of Korea.
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16
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Iranshahy M, Quinn RJ, Iranshahi M. Biologically active isoquinoline alkaloids with drug-like properties from the genus Corydalis. RSC Adv 2014. [DOI: 10.1039/c3ra47944g] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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17
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Kelebekli L. Rhodium-catalysed Nucleophilic Ring Opening Reaction of 1- and 3-ethoxy-5,8-epoxy-5,8-dihydroisoquinolines. JOURNAL OF CHEMICAL RESEARCH 2013. [DOI: 10.3184/174751913x13663103976700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
2-Ethoxy-3- and 5-chloropyridines were obtained from 2,3- and 2,5-dichloropyridine. Reaction of 2,3- and 2,5-dichlo-ropyridines with tBuLi in the presence of furan gave 1- and 3-ethoxy-5,8-epoxy-5,8-dihydroisoquinolines. The rhodium-catalysed ring-opening reaction of 1- and 3-ethoxy-5,8-epoxy-5,8-dihydroisoquinolines with 2-bromophenol furnished the isomer 7-(2-bromophenoxy)-1-ethoxy-7,8-dihydroisoquinolin-8-ol, 6-(2-bromophenoxy)-1-ethoxy-5,6-dihydroisoquinolin-5-ol and 7-(2-bromophenoxy)-3-ethoxy-7,8-dihydroisoquinolin-8-ol, 6-(2-bromophenoxy)-3-ethoxy-5,6-dihydroisoquinolin-5-ol respectively.
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Affiliation(s)
- Latif Kelebekli
- Department of Chemistry, Ordu University, 52200 Ordu, Turkey
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18
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Song NJ, Yoon HJ, Kim KH, Jung SR, Jang WS, Seo CR, Lee YM, Kweon DH, Hong JW, Lee JS, Park KM, Lee KR, Park KW. Butein is a novel anti-adipogenic compound. J Lipid Res 2013; 54:1385-96. [PMID: 23468131 DOI: 10.1194/jlr.m035576] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Rhus verniciflua Stokes (RVS) has been used as a traditional herbal medicine for its various biological activities including anti-adipogenic effects. Activity-guided separation led to the identification of the anti-adipogenic functions of butein. Butein, a novel anti-adipogenic compound, robustly suppressed lipid accumulation and inhibited expression of adipogenic markers. Molecular studies showed that activated transforming growth factor-β (TGF-β) and suppressed signal transducer and activator of transcription 3 (STAT3) signaling pathways were mediated by butein. Analysis of the temporal expression profiles suggests that TGF-β signaling precedes the STAT3 in the butein-mediated anti-adipogenic cascade. Small interfering RNA-mediated silencing of STAT3 or SMAD2/3 blunted the inhibitory effects of butein on adipogenesis indicating that an interaction between two signaling pathways is required for the action of butein. Upon butein treatments, stimulation of TGF-β signaling was still preserved in STAT3 silenced cells, whereas regulation of STAT3 signaling by butein was significantly impaired in SMAD2/3 silenced cells, further showing that TGF-β acts upstream of STAT3 in the butein-mediated anti-adipogenesis. Taken together, the present study shows that butein, a novel anti-adipogenic compound from RVS, inhibits adipocyte differentiation through the TGF-β pathway followed by STAT3 and peroxisome proliferator-activated receptor γ signaling, further implicating potential roles of butein in TGF-β- and STAT3-dysregulated diseases.
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Affiliation(s)
- No-Joon Song
- Department of Food Science and Biotechnology, Sungkyunkwan University, Suwon 440-746, Republic of Korea
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Jeong EK, Lee SY, Yu SM, Park NH, Lee HS, Yim YH, Hwang GS, Cheong C, Jung JH, Hong J. Identification of structurally diverse alkaloids in Corydalis species by liquid chromatography/electrospray ionization tandem mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2012; 26:1661-74. [PMID: 22730087 DOI: 10.1002/rcm.6272] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
RATIONALE Alkaloids with significant therapeutic effects are the main active constituents of Corydalis (C.) species. There are several kinds of alkaloids in C. species associated with diverse alkaloid metabolism in plants, but they are rarely identified. This study aimed to identify diverse alkaloids in C. species by liquid chromatography/electrospray ionization tandem mass spectrometry (LC/ESI-MS/MS). METHODS Several types of alkaloids were extracted from C. species using ultrasonication with 70% CH(3)OH, and the extract was partitioned at pH 2 and 12. Separation of alkaloids was achieved by C18 high-performance liquid chromatography (HPLC), and MS/MS analysis was conducted by electrospray ionization triple-quadrupole mass spectrometry. For further confirmation, LC/Fourier transform ion cyclotron resonance (FTICR)-MS was used to obtain accurate mass data and gas chromatography (GC)/MS combined with trimethylsilyl derivatization was applied for identification of the minor alkaloids. RESULTS Thirty-three alkaloids among three different C. species were successfully separated and identified by LC/ESI-MS/MS and LC/FTICR-MS. Structural assignment of individual alkaloids was performed according to MS/MS spectral patterns. For further confirmation, accurate mass data of alkaloids by LC/FTICR-MS were obtained within 5 ppm and the GC/MS data for the trimethylsilyl alkaloids were also obtained. Among 33 alkaloids identified from this study, 13 alkaloids were reported for the first time in the investigated C. species. CONCLUSIONS The LC/ESI-MS/MS technique was effective in obtaining structural information and yielded diagnostic ions for diverse alkaloids. Based on the identified 33 alkaloids, marker compounds were suggested for the three C. species with different geographic origins. This study may also be useful for elucidating unknown alkaloids in herbal medicines.
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Affiliation(s)
- Eun-Kyung Jeong
- College of Pharmacy & Kyunghee East-west Pharmaceutical Research Institute, Kyung Hee University, Seoul 130-701, Republic of Korea
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Kim KH, Choi SU, Lee KR. Turtschamide, a cytotoxic putrescine bisamide from Corydalis turtschaninovii. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.01.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Lee KM, Kim JC, Kang P, Lee WK, Eum H, Ha HJ. Chiral aziridine-2-carboxylates: versatile precursors for functionalized tetrahydroisoquinoline (THIQ) containing heterocycles. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.11.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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22
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Kim EK, Jeong EK, Han SB, Jung JH, Hong JK. HPLC Separation of Isoquinoline Alkaloids for Quality Control of Corydalis species. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.10.3597] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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