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Mazur O, Bałdysz S, Warowicka A, Nawrot R. Tap the sap - investigation of latex-bearing plants in the search of potential anticancer biopharmaceuticals. FRONTIERS IN PLANT SCIENCE 2022; 13:979678. [PMID: 36388598 PMCID: PMC9664067 DOI: 10.3389/fpls.2022.979678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Latex-bearing plants have been in the research spotlight for the past couple of decades. Since ancient times their extracts have been used in folk medicine to treat various illnesses. Currently they serve as promising candidates for cancer treatment. Up to date there have been several in vitro and in vivo studies related to the topic of cytotoxicity and anticancer activity of extracts from latex-bearing plants towards various cell types. The number of clinical studies still remains scarce, however, over the years the number is systematically increasing. To the best of our knowledge, the scientific community is still lacking in a recent review summarizing the research on the topic of cytotoxicity and anticancer activity of latex-bearing plant extracts. Therefore, the aim of this paper is to review the current knowledge on in vitro and in vivo studies, which focus on the cytotoxicity and anticancer activities of latex-bearing plants. The vast majority of the studies are in vitro, however, the interest in this topic has resulted in the substantial growth of the number of in vivo studies, leading to a promising number of plant species whose latex can potentially be tested in clinical trials. The paper is divided into sections, each of them focuses on specific latex-bearing plant family representatives and their potential anticancer activity, which in some instances is comparable to that induced by commonly used therapeutics currently available on the market. The cytotoxic effect of the plant's crude latex, its fractions or isolated compounds, is analyzed, along with a study of cell apoptosis, chromatin condensation, DNA damage, changes in gene regulation and morphology changes, which can be observed in cell post plant extract addition. The in vivo studies go beyond the molecular level by showing significant reduction of the tumor growth and volume in animal models. Additionally, we present data regarding plant-mediated biosynthesis of nanoparticles, which is regarded as a new branch in plant latex research. It is solely based on the green-synthesis approach, which presents an interesting alternative to chemical-based nanoparticle synthesis. We have analyzed the cytotoxic effect of these particles on cells. Data regarding the cytotoxicity of such particles raises their potential to be involved in the design of novel cancer therapies, which further underlines the significance of latex-bearing plants in biotechnology. Throughout the course of this review, we concluded that plant latex is a rich source of many compounds, which can be further investigated and applied in the design of anticancer pharmaceuticals. The molecules, to which this cytotoxic effect can be attributed, include alkaloids, flavonoids, tannins, terpenoids, proteases, nucleases and many novel compounds, which still remain to be characterized. They have been studied extensively in both in vitro and in vivo studies, which provide an excellent starting point for their rapid transfer to clinical studies in the near future. The comprehensive study of molecules from latex-bearing plants can result in finding a promising alternative to several pharmaceuticals on the market and help unravel the molecular mode of action of latex-based preparations.
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Affiliation(s)
- Oliwia Mazur
- Department of Molecular Virology, Institute of Experimental Biology, Adam Mickiewicz University, Poznań, Poland
| | - Sophia Bałdysz
- Department of Molecular Virology, Institute of Experimental Biology, Adam Mickiewicz University, Poznań, Poland
| | - Alicja Warowicka
- Department of Molecular Virology, Institute of Experimental Biology, Adam Mickiewicz University, Poznań, Poland
- NanoBioMedical Centre, Adam Mickiewicz University, Poznań, Poland
| | - Robert Nawrot
- Department of Molecular Virology, Institute of Experimental Biology, Adam Mickiewicz University, Poznań, Poland
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2
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Shen L, Lee S, Joo JC, Hong E, Cui ZY, Jo E, Park SJ, Jang HJ. Chelidonium majus Induces Apoptosis of Human Ovarian Cancer Cells via ATF3-Mediated Regulation of Foxo3a by Tip60. J Microbiol Biotechnol 2022; 32:493-503. [PMID: 35283423 PMCID: PMC9628819 DOI: 10.4014/jmb.2109.09030] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 01/16/2022] [Accepted: 02/14/2022] [Indexed: 12/15/2022]
Abstract
Forkhead transcription factor 3a (Foxo3a) is believed to be a tumor suppressor as its inactivation leads to cell transformation and tumor development. However, further investigation is required regarding the involvement of the activating transcription factor 3 (ATF3)-mediated Tat-interactive protein 60 (Tip60)/Foxo3a pathway in cancer cell apoptosis. This study demonstrated that Chelidonium majus upregulated the expression of ATF3 and Tip60 and promoted Foxo3a nuclear translocation, ultimately increasing the level of Bcl-2-associated X protein (Bax) protein. ATF3 overexpression stimulated Tip60 expression, while ATF3 inhibition by siRNA repressed Tip60 expression. Furthermore, siRNA-mediated Tip60 inhibition significantly promoted Foxo3a phosphorylation, leading to blockade of Foxo3a translocation into the nucleus. Thus, we were able to deduce that ATF3 mediates the regulation of Foxo3a by Tip60. Moreover, siRNA-mediated Foxo3a inhibition suppressed the expression of Bax and subsequent apoptosis. Taken together, our data demonstrate that Chelidonium majus induces SKOV-3 cell death by increasing ATF3 levels and its downstream proteins Tip60 and Foxo3a. This suggests a potential therapeutic role of Chelidonium majus against ovarian cancer.
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Affiliation(s)
- Lei Shen
- Aerospace Center Hospital, Beijing 100049, P.R. China
| | - Soon Lee
- Division of Analytical Science, Korea Basic Science Institute, Daejeon 34133, Republic of Korea,Division of Analytical Science, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Jong Cheon Joo
- Department of Sasang Constitutional Medicine, College of Korean Medicine, Wonkwang University, Iksan 54538, Republic of Korea
| | - Eunmi Hong
- Division of Analytical Science, Korea Basic Science Institute, Daejeon 34133, Republic of Korea
| | - Zhen Yang Cui
- Rehabilitation Medicine College, Weifang Medical University, Weifang 261042, P.R. China
| | - Eunbi Jo
- Department of Life Science and Research Institute for Natural Sciences, College of Natural Sciences, Hanyang University, Seoul 04763, Republic of Korea
| | - Soo Jung Park
- Department of Sasang Constitutional Medicine, College of Korean Medicine, Woosuk University, Jeonju 54987, Republic of Korea,
S.J. Park Phone: +82-63-220-8676 E-mail:
| | - Hyun-Jin Jang
- Laboratory of Chemical Biology and Genomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea,Corresponding authors H.J. Jang Phone: +42-860-4563 E-mail:
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3
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Opposing Effects of Chelidonine on Tyrosine and Serine Phosphorylation of STAT3 in Human Uveal Melanoma Cells. Int J Mol Sci 2021; 22:ijms222312974. [PMID: 34884773 PMCID: PMC8658041 DOI: 10.3390/ijms222312974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/23/2021] [Accepted: 11/25/2021] [Indexed: 11/17/2022] Open
Abstract
STAT3 is a transcription factor that regulates various cellular processes with oncogenic potential, thereby promoting tumorigenesis when activated uncontrolled. STAT3 activation is mediated by its tyrosine phosphorylation, triggering dimerization and nuclear translocation. STAT3 also contains a serine phosphorylation site, with a postulated regulatory role in STAT3 activation and G2/M transition. Interleukin-6, a major activator of STAT3, is present in elevated concentrations in uveal melanomas, suggesting contribution of dysregulated STAT3 activation to their pathogenesis. Here, we studied the impact of chelidonine on STAT3 signaling in human uveal melanoma cells. Chelidonine, an alkaloid isolated from Chelidonium majus, disrupts microtubules, causes mitotic arrest and provokes cell death in numerous tumor cells. According to our flow cytometry and confocal microscopy data, chelidonine abrogated IL-6-induced activation and nuclear translocation, but amplified constitutive serine phosphorylation of STAT3. Both effects were restricted to a fraction of cells only, in an all-or-none fashion. A partial overlap could be observed between the affected subpopulations; however, no direct connection could be proven. This study is the first proof on a cell-by-cell basis for the opposing effects of a microtubule-targeting agent on the two types of STAT3 phosphorylation.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400 076 India
| | | | - Yellaiah Tangella
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400 076 India
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5
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Weidong L, Sanna L, Bordoni V, Tiansheng Z, Chengxun L, Murineddu G, Pinna GA, Kelvin DJ, Bagella L. Target identification of a novel unsymmetrical 1,3,4-oxadiazole derivative with antiproliferative properties. J Cell Physiol 2021; 236:3789-3799. [PMID: 33089499 DOI: 10.1002/jcp.30120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 09/22/2020] [Accepted: 10/10/2020] [Indexed: 02/05/2023]
Abstract
1,3,4-Oxadiazole derivatives are widely used in research on antineoplastic drugs. Recently, we discovered a novel unsymmetrical 1,3,4-oxadiazole compound with antiproliferative properties called 2j. To further investigate its possible targets and molecular mechanisms, RNA-seq was performed and the differentially expressed genes (DEGs) were obtained after treatment. Data were analyzed using functional (Gene Ontology term) and pathway (Kyoto Encyclopedia of Genes and Genomes) enrichment of the DEGs. The hub genes were determined by the analysis of protein-protein interaction networks. The connectivity map (CMap) information provided insight into the model action of antitumor small molecule drugs. Hub genes have been identified through function gene networks using STRING analysis. The small molecular targets obtained by CMap comparison showed that 2j is a tubulin inhibitor and it acts mainly affecting tumor cells through the cell cycle, FoxO signaling pathway, apoptotic, and p53 signaling pathways. The possible targets of 2j could be TUBA1A and TUBA4A. Molecular docking results indicated that 2j interacts at the colchicine-binding site on tubulin.
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Affiliation(s)
- Lyu Weidong
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
- Laboratory of Immunity, Shantou University Medical College, Shantou, Guangdong, China
| | - Luca Sanna
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Valentina Bordoni
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Zeng Tiansheng
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
- Laboratory of Immunity, Shantou University Medical College, Shantou, Guangdong, China
| | - Li Chengxun
- Laboratory of Immunity, Shantou University Medical College, Shantou, Guangdong, China
| | - Gabriele Murineddu
- Department of Chemistry and Pharmacy, University of Sassari, Sassari, Italy
| | - Gerard A Pinna
- Department of Chemistry and Pharmacy, University of Sassari, Sassari, Italy
| | - David J Kelvin
- Laboratory of Immunity, Shantou University Medical College, Shantou, Guangdong, China
- Department of Microbiology and Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Luigi Bagella
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
- Sbarro Institute for Cancer Research and Molecular Medicine, Temple University, Philadelphia, Pennsylvania, USA
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6
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The Anticancer Effect of Natural Plant Alkaloid Isoquinolines. Int J Mol Sci 2021; 22:ijms22041653. [PMID: 33562110 PMCID: PMC7915290 DOI: 10.3390/ijms22041653] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/02/2021] [Accepted: 02/03/2021] [Indexed: 12/24/2022] Open
Abstract
Isoquinoline alkaloids-enriched herbal plants have been used as traditional folk medicine for their anti-inflammatory, antimicrobial, and analgesic effects. They induce cell cycle arrest, apoptosis, and autophagy, leading to cell death. While the molecular mechanisms of these effects are not fully understood, it has been suggested that binding to nucleic acids or proteins, enzyme inhibition, and epigenetic modulation by isoquinoline alkaloids may play a role in the effects. This review discusses recent evidence on the molecular mechanisms by which the isoquinoline alkaloids can be a therapeutic target of cancer treatment.
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Hutchings‐Goetz LS, Yang C, Fyfe JWB, Snaddon TN. Enantioselective Syntheses of
Strychnos
and
Chelidonium
Alkaloids through Regio‐ and Stereocontrolled Cooperative Catalysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005151] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Luke S. Hutchings‐Goetz
- Department of Chemistry Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
| | - Chao Yang
- Department of Chemistry Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
| | - James W. B. Fyfe
- Department of Chemistry Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
| | - Thomas N. Snaddon
- Department of Chemistry Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
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8
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Hutchings‐Goetz LS, Yang C, Fyfe JWB, Snaddon TN. Enantioselective Syntheses of
Strychnos
and
Chelidonium
Alkaloids through Regio‐ and Stereocontrolled Cooperative Catalysis. Angew Chem Int Ed Engl 2020; 59:17556-17564. [DOI: 10.1002/anie.202005151] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Indexed: 02/06/2023]
Affiliation(s)
- Luke S. Hutchings‐Goetz
- Department of Chemistry Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
| | - Chao Yang
- Department of Chemistry Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
| | - James W. B. Fyfe
- Department of Chemistry Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
| | - Thomas N. Snaddon
- Department of Chemistry Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
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Zhang J, Li X, Huang L. Anticancer activities of phytoconstituents and their liposomal targeting strategies against tumor cells and the microenvironment. Adv Drug Deliv Rev 2020; 154-155:245-273. [PMID: 32473991 PMCID: PMC7704676 DOI: 10.1016/j.addr.2020.05.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/07/2020] [Accepted: 05/20/2020] [Indexed: 12/13/2022]
Abstract
Various bioactive ingredients have been extracted from Chinese herbal medicines (CHMs) that affect tumor progression and metastasis. To further understand the mechanisms of CHMs in cancer therapy, this article summarizes the effects of five categories of CHMs and their active ingredients on tumor cells and the tumor microenvironment. Despite their treatment potential, the undesirable physicochemical properties (poor permeability, instability, high hydrophilicity or hydrophobicity, toxicity) and unwanted pharmacokinetic profiles (short half-life in blood and low bioavailability) restrict clinical studies of CHMs. Therefore, development of liposomes through relevant surface modifying techniques to achieve targeted CHM delivery for cancer cells, i.e., extracellular and intracellular targets and targets in tumor microenvironment or vasculature, have been reviewed. Current challenges of liposomal targeting of these phytoconstituents and future perspective of CHM applications are discussed to provide an informative reference for interested readers.
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Affiliation(s)
- Jing Zhang
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, Jiangxi, China
| | - Xiang Li
- Key Laboratory of Modern Preparation of TCM, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, Jiangxi, China
| | - Leaf Huang
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, United States.
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10
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Xie YJ, Gao WN, Wu QB, Yao XJ, Jiang ZB, Wang YW, Wang WJ, Li W, Hussain S, Liu L, Leung ELH, Fan XX. Chelidonine selectively inhibits the growth of gefitinib-resistant non-small cell lung cancer cells through the EGFR-AMPK pathway. Pharmacol Res 2020; 159:104934. [PMID: 32464330 DOI: 10.1016/j.phrs.2020.104934] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 05/14/2020] [Accepted: 05/14/2020] [Indexed: 02/08/2023]
Abstract
Tyrosine kinase inhibitors (TKIs) have been widely used for the clinical treatment of patients with non-small cell lung cancer (NSCLC) harboring mutations in the EGFR. Unfortunately, due to the secondary mutation in EGFR, eventual drug-resistance is inevitable. Therefore, to overcome the resistance, new agent is urgently required. Chelidonine, extracted from the roots of Chelidonium majus, was proved to effectively suppress the growth of NSCLC cells with EGFR double mutation. Proteomics analysis indicated that mitochondrial respiratory chain was significantly inhibited by chelidonine, and inhibitor of AMPK effectively blocked the apoptosis induced by chelidonine. Molecular dynamics simulations indicated that chelidonine could directly bind to EGFR and showed a much higher binding affinity to EGFRL858R/T790M than EGFRWT, which demonstrated that chelidonine could selectively inhibit the phosphorylation of EGFR in cells with EGFR double-mutation. In vivo study revealed that chelidonine has a similar inhibitory effect like second generation TKI Afatinib. In conclusion, targeting EGFR and inhibition of mitochondrial function is a promising anti-cancer therapeutic strategy for inhibiting NSCLC with EGFR mutation and TKI resistance.
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Affiliation(s)
- Ya-Jia Xie
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau, SAR, PR China
| | - Wei-Na Gao
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau, SAR, PR China; Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, PR China
| | - Qi-Biao Wu
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau, SAR, PR China
| | - Xiao-Jun Yao
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau, SAR, PR China
| | - Ze-Bo Jiang
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau, SAR, PR China
| | - Yu-Wei Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau, SAR, PR China
| | - Wen-Jun Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau, SAR, PR China
| | - Wei Li
- TianJin NanKai Hospital, TianJin, PR China
| | - Shahid Hussain
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau, SAR, PR China
| | - Liang Liu
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau, SAR, PR China.
| | - Elaine Lai-Han Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau, SAR, PR China.
| | - Xing-Xing Fan
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau, SAR, PR China.
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Huang X, Cheng K, Liu L, Hu X, Gao X, Li H, Xu F, Li Z, Hua H, Li D. Design, synthesis and apoptosis-related antiproliferative activities of chelidonine derivatives. Bioorg Med Chem Lett 2020; 30:126913. [PMID: 31883693 DOI: 10.1016/j.bmcl.2019.126913] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 12/11/2019] [Accepted: 12/16/2019] [Indexed: 11/25/2022]
Abstract
To get chelidonine derivatives with enhanced antiproliferative activity and selectivity, a series of nitric oxide donating derivatives (10a-f and 11a-j) were designed, synthesized and biologically evaluated. Compared with chelidonine, these compounds exhibited lower IC50 values against human hepatoma cells HepG2, breast cancer cells MCF-7, colon cancer cells HCT-116, as well as leukemia cells K562. Compound 11j displayed the strongest antiproliferative activity with IC50 values of 3.91, 6.90, 4.36 and 1.12 μM against the above four cells, respectively. Nevertheless, it showed an IC50 value >40 μM against human peripheral blood mononuclear cells (PBMCs), which demonstrated high selectivity between normal and cancer blood cells. In further mechanism studies, 11j showed the capability to induce K562 cells apoptosis, S phase cell cycle arrest and mitochondrial membrane potential disorder. Besides, 11j was found to be effective in promoting the expression of proapoptotic protein Bad and suppressing the expression of anti-apoptotic proteins Bcl-xL, catalase, survivin, claspin and clusterin.
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Affiliation(s)
- Xueyan Huang
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Keguang Cheng
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, and School of Chemistry and Pharmacy, Guangxi Normal University, 15 Yucai Raod, Guilin 541004, PR China
| | - Lilin Liu
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Xu Hu
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Xiang Gao
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Haonan Li
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Fanxing Xu
- Wuya College of Innovation, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China.
| | - Zhanlin Li
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China
| | - Huiming Hua
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China.
| | - Dahong Li
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China.
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12
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Prasad B, Phanindrudu M, Tiwari DK, Kamal A. Transition-Metal-Free One-Pot Tandem Synthesis of 3-Ketoisoquinolines from Aldehydes and Phenacyl Azides. J Org Chem 2019; 84:12334-12343. [PMID: 31502837 DOI: 10.1021/acs.joc.9b01534] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An efficient and transition-metal-free strategy for the synthesis of 3-keto-isoquinolines in one pot has been developed from the easily accessible 2-(formylphenyl)acrylates and phenacyl azides. Various substituted aldehydes and phenacyl azides were successfully employed in this transformation to furnish a variety 3-keto-isoquinolines in very good yields. A number of controlled experiments were conducted to postulate the reaction mechanism. Secondary functionalizations of 2-keto-isoquinolins were also performed to showcase the synthetic utility.
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Affiliation(s)
- Budaganaboyina Prasad
- Division of Organic Synthesis and Process Chemistry , CSIR-Indian Institute of Chemical Technology , Hyderabad 500007 , India
| | - Mandalaparthi Phanindrudu
- Division of Organic Synthesis and Process Chemistry , CSIR-Indian Institute of Chemical Technology , Hyderabad 500007 , India
| | - Dharmendra Kumar Tiwari
- Molecular Synthesis and Drug Discovery Laboratory, Center of Biomedical Research , Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus , Raebareli Road , Lucknow 226014 , India
| | - Ahmed Kamal
- School of Pharmaceutical Education and Research (SPER) , Jamia Hamdard , 110 062 New Delhi , India
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13
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Gao L, Schmitz HJ, Merz KH, Schrenk D. Characterization of the cytotoxicity of selected Chelidonium alkaloids in rat hepatocytes. Toxicol Lett 2019; 311:91-97. [PMID: 31054355 DOI: 10.1016/j.toxlet.2019.04.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/22/2019] [Accepted: 04/29/2019] [Indexed: 11/25/2022]
Abstract
Phytomedicinal preparations containing extracts of the plant Chelidonium majus (Greater Celandine) have been used in the therapy of upper abdominal disorders. C. majus alkaloids (CAL) were suspected to be responsible for reported cases of liver symptoms including cases of acute liver failure in patients upon treatment with certain C. majus preparations. Based on these reports, a safe oral daily dose limit of not more than 2.5 mg CAL was established in the EU. However, C. majus extracts and individual CAL were not able to elicit similar adverse effects when given orally to pigs or rats. We found that CAL differ considerably in their cytotoxicity in rat hepatocytes in culture. The cationic congeners chelerythrine, coptisine and sanguinarine were the most toxic ones (EC20 values ≤2 μM) while the neutral congeners chelidonine, dihydrosanguinarine and protopine were less toxic, with a rank order of toxicity of coptisine > chelerythrine > sanguinarine > chelidonine > protopine > dihydrosanguinarine. Calculation of octanol-water partition coefficients revealed that the most cytotoxic CAL in hepatocytes were the cationic polar ones. At cytotoxic concentrations sanguinarine led to a marked decrease in reduced and oxidized intracellular glutathione while the much less cytotoxic dihydrosanguinarine did not. After glutathione depletion with menadione, CAL toxicity was only slightly enhanced. Comparison of the cytotoxic concentrations to reported liver levels in experimental animals suggests that the latter were too low to cause hepatotoxicity, probably due to an extremely low oral availability of certain CAL.
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Affiliation(s)
- Lan Gao
- Food Chemistry and Toxicology, Faculty of Chemistry, University of Kaiserslautern, Kaiserslautern, Germany
| | - Hans-Joachim Schmitz
- Food Chemistry and Toxicology, Faculty of Chemistry, University of Kaiserslautern, Kaiserslautern, Germany
| | - Karl-Heinz Merz
- Food Chemistry and Toxicology, Faculty of Chemistry, University of Kaiserslautern, Kaiserslautern, Germany
| | - Dieter Schrenk
- Food Chemistry and Toxicology, Faculty of Chemistry, University of Kaiserslautern, Kaiserslautern, Germany.
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14
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Kazemi Noureini S, Fatemi L, Wink M. Telomere shortening in breast cancer cells (MCF7) under treatment with low doses of the benzylisoquinoline alkaloid chelidonine. PLoS One 2018; 13:e0204901. [PMID: 30281650 PMCID: PMC6169906 DOI: 10.1371/journal.pone.0204901] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 09/17/2018] [Indexed: 01/23/2023] Open
Abstract
Telomeres, the specialized dynamic structures at chromosome ends, regularly shrink with every replication. Thus, they function as an internal molecular clock counting down the number of cell divisions. However, most cancer cells escape this limitation by activating telomerase, which can maintain telomere length. Previous studies showed that the benzylisoquinoline alkaloid chelidonine stimulates multiple modes of cell death and strongly down-regulates telomerase. It is still unknown if down-regulation of telomerase by chelidonine boosts substantial telomere shortening. The breast cancer cell line MCF7 was sequentially treated with very low concentrations of chelidonine over several cell passages. Telomere length and telomerase activity were measured by a monochrome multiplex quantitative PCR and a q-TRAP assay, respectively. Changes in population size and doubling time correlated well with telomerase inhibition and telomere shortening. MCF7 cell growth was arrested completely after three sequential treatments with 0.1 μM chelidonine, each ending after 48 h, while telomere length was reduced to almost 10% of the untreated control. However, treatment with 0.01 μM chelidonine did not have any apparent consequence. In addition to dose and time dependent telomerase inhibition, chelidonine changed the splicing pattern of hTERT towards non-enzyme coding isoforms of the transcript. In conclusion, telomere length and telomere stability are strongly affected by chelidonine in addition to microtubule formation.
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Affiliation(s)
- Sakineh Kazemi Noureini
- Department of Biology, Faculty of Basic Sciences, Hakim Sabzevari University, Sabzevar, Iran
- * E-mail:
| | - Leili Fatemi
- Department of Biology, Faculty of Basic Sciences, Hakim Sabzevari University, Sabzevar, Iran
| | - Michael Wink
- Department of Biology, Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Heidelberg, Germany
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15
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Herrmann R, Roller J, Polednik C, Schmidt M. Effect of chelidonine on growth, invasion, angiogenesis and gene expression in head and neck cancer cell lines. Oncol Lett 2018; 16:3108-3116. [PMID: 30127902 PMCID: PMC6096282 DOI: 10.3892/ol.2018.9031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 05/25/2018] [Indexed: 01/18/2023] Open
Abstract
The greater celandine 'Chelidonium majus' and its main alkaloid chelidonine have previously been shown to exert high cytotoxicity against cancer cells. Furthermore, chelidonine is proposed to possess pro-apoptotic and anti-metastatic properties. Within the present study, the effects chelidonine on several HNSCC cell lines, as well as primary cells, were analyzed with respect to growth, migration, angiogenesis and apoptosis. Chelidonine suppressed the growth of all tested HNSCC cell lines, including a paclitaxel-resistant and P-glycoprotein (MDR1) overexpressing cell line, but not in a clear dose-dependent manner. Mucosal keratinocytes were also strongly affected by chelidonine, while fibroblasts proved to be much more resistant. Chelidonine failed to trigger apoptosis at physiological concentrations in HNSCC cell lines. Based on a spheroid invasion model chelidonine suppressed invasion of FaDu cells effectively on gelatin, fibronectin, collagen I, laminin and Matrigel®. However, invasion inhibition of the more aggressively invading cell line HLaC78 largely failed. Using the tube formation assay, chelidonine effectively inhibited angiogenesis. Expression analysis revealed an upregulation of the xenobiotic metabolism genes CYP1A1 and MDR1 by chelidonine. In summary, chelidonine appeared to exert only minor impact on head and neck cancer cells. Chelidonine did not produce clear dose-dependent and cell-type specific cytotoxicity nor did it trigger apoptosis strongly.
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Affiliation(s)
- Ruth Herrmann
- Department of Otorhinolaryngology, University of Wuerzburg, D-97080 Wuerzburg, Germany
| | - Jeanette Roller
- Department of Otorhinolaryngology, University of Wuerzburg, D-97080 Wuerzburg, Germany
| | - Christine Polednik
- Department of Otorhinolaryngology, University of Wuerzburg, D-97080 Wuerzburg, Germany
| | - Marianne Schmidt
- Department of Otorhinolaryngology, University of Wuerzburg, D-97080 Wuerzburg, Germany
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16
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Li RQ, He Y, Ding Y, Ang CK, Tian JS, Loh TP. Formal synthesis of chelamidine alkaloids and their derivatives. Chem Commun (Camb) 2018. [DOI: 10.1039/c7cc09875h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A concise two-step operation of α-amination of aldehydes and subsequent Friedel–Crafts/Prins-type cyclization towards accessing tetrahydrobenzo[c]phenanthridine and related structures was developed. In addition, the effectiveness of this protocol was also demonstrated in the formal synthesis of homochelidonine and chelamidine.
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Affiliation(s)
- Rui-Qi Li
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering (SCME), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech)
- Nanjing 211816
- P. R. China
| | - Yu He
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering (SCME), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech)
- Nanjing 211816
- P. R. China
| | - Yao Ding
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering (SCME), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech)
- Nanjing 211816
- P. R. China
| | - Chee-Kiat Ang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University (NTU)
- Singapore 637371
- Singapore
| | - Jie-Sheng Tian
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering (SCME), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech)
- Nanjing 211816
- P. R. China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering (SCME), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech)
- Nanjing 211816
- P. R. China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University (NTU)
- Singapore 637371
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17
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Fernandes TS, Copetti D, do Carmo G, Neto AT, Pedroso M, Silva UF, Mostardeiro MA, Burrow RE, Dalcol II, Morel AF. Phytochemical analysis of bark from Helietta apiculata Benth and antimicrobial activities. PHYTOCHEMISTRY 2017; 141:131-139. [PMID: 28614729 DOI: 10.1016/j.phytochem.2017.05.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 05/22/2017] [Accepted: 05/29/2017] [Indexed: 06/07/2023]
Abstract
Extraction and characterization of natural products from the bark of the trunk of Helietta apiculata Benth (Rutaceae) afforded nine alkaloids, eight furoquinoline and one quinolone, limonine, three cinnamic acid derivatives, three neolignans, tetracosanoic acid, six coumarins, of which apiculin A and apiculin B (neolignans), and tanizin (coumarin) are previously undescribed compounds. The structures of all compounds were determined by spectroscopic methods, and the crystal structures of two of the newly undescribed compounds, apiculin A and apiculin B, were determined by X-ray analysis. Extracts and pure compounds isolated from Helietta apiculata showed promising antimicrobial activities.
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Affiliation(s)
- Tanize S Fernandes
- Department of Chemistry, Federal University of Santa Maria, Rio Grande do Sul, Brazil
| | - Daniele Copetti
- Department of Chemistry, Federal University of Santa Maria, Rio Grande do Sul, Brazil
| | - Gabriele do Carmo
- Department of Chemistry, Federal University of Santa Maria, Rio Grande do Sul, Brazil
| | - Alexandre T Neto
- Department of Chemistry, Federal University of Santa Maria, Rio Grande do Sul, Brazil
| | - Marcelo Pedroso
- Department of Chemistry, Federal University of Santa Maria, Rio Grande do Sul, Brazil
| | - Ubiratan F Silva
- Department of Chemistry, Federal University of Santa Maria, Rio Grande do Sul, Brazil
| | - Marco A Mostardeiro
- Department of Chemistry, Federal University of Santa Maria, Rio Grande do Sul, Brazil
| | - Robert E Burrow
- Department of Chemistry, Federal University of Santa Maria, Rio Grande do Sul, Brazil
| | - Ionara I Dalcol
- Department of Chemistry, Federal University of Santa Maria, Rio Grande do Sul, Brazil
| | - Ademir F Morel
- Department of Chemistry, Federal University of Santa Maria, Rio Grande do Sul, Brazil.
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18
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Havelek R, Seifrtova M, Kralovec K, Habartova K, Cahlikova L, Rezacova M. Chelidonine and Homochelidonine Induce Cell Death through Cell Cycle Checkpoints and MAP Kinase Pathways. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701200910] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This study focuses on the comparative in vitro cytotoxicity of chelidonine and homochelidonine on human cancer and non-cancer cells. Both alkaloids produced a decrease in cellular growth in a dose-dependent manner exhibiting greater potency in cancer cells. The growth inhibitory effect was evidenced in both ovarian carcinoma A2780 and lung fibroblast MRC-5 cells by inducing G2 and mitotic phase cell cycle arrest. Results indicated that the extent of apoptosis induced by chelidonine and homochelidonine was correlated to sensitivity to the antiproliferative activity of the evaluated compounds. Western blotting suggested that the cellular toxicological mechanism of chelidonine is related to the differential upregulation of phospho-Chk2, p21Cip1/Waf1, phospho-ERK1/2 and phospho-p38 in various cell types, leading to alternations in the suppression of proliferation and either induction or prevention of apoptosis. Chelidonine showed the more potent effects and also affected the cell cycle checkpoints and MAPK signaling pathways within cells.
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Affiliation(s)
- Radim Havelek
- Department of Medical Biochemistry, Faculty of Medicine in Hradec Králové, Charles University, Šimkova 870, Hradec Králové 500 03, Czech Republic
| | - Martina Seifrtova
- Department of Medical Biochemistry, Faculty of Medicine in Hradec Králové, Charles University, Šimkova 870, Hradec Králové 500 03, Czech Republic
| | - Karel Kralovec
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, Pardubice 532 10, Czech Republic
| | - Klara Habartova
- Department of Medical Biochemistry, Faculty of Medicine in Hradec Králové, Charles University, Šimkova 870, Hradec Králové 500 03, Czech Republic
| | - Lucie Cahlikova
- ADINACO Research group, Department of Pharmaceutical Botany and Ecology, Faculty of Pharmacy, Charles University, Heyrovského 1203, Hradec Králové 500 05, Czech Republic
| | - Martina Rezacova
- Department of Medical Biochemistry, Faculty of Medicine in Hradec Králové, Charles University, Šimkova 870, Hradec Králové 500 03, Czech Republic
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19
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Wang X, Tanaka M, Krstin S, Peixoto HS, Wink M. The Interference of Selected Cytotoxic Alkaloids with the Cytoskeleton: An Insight into Their Modes of Action. Molecules 2016; 21:E906. [PMID: 27420038 PMCID: PMC6273799 DOI: 10.3390/molecules21070906] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 07/05/2016] [Accepted: 07/06/2016] [Indexed: 02/01/2023] Open
Abstract
Alkaloids, the largest group among the nitrogen-containing secondary metabolites of plants, usually interact with several molecular targets. In this study, we provide evidence that six cytotoxic alkaloids (sanguinarine, chelerythrine, chelidonine, noscapine, protopine, homoharringtonine), which are known to affect neuroreceptors, protein biosynthesis and nucleic acids, also interact with the cellular cytoskeleton, such as microtubules and actin filaments, as well. Sanguinarine, chelerythrine and chelidonine depolymerized the microtubule network in living cancer cells (Hela cells and human osteosarcoma U2OS cells) and inhibited tubulin polymerization in vitro with IC50 values of 48.41 ± 3.73, 206.39 ± 4.20 and 34.51 ± 9.47 μM, respectively. However, sanguinarine and chelerythrine did not arrest the cell cycle while 2.5 μM chelidonine arrested the cell cycle in the G₂/M phase with 88.27% ± 0.99% of the cells in this phase. Noscapine and protopine apparently affected microtubule structures in living cells without affecting tubulin polymerization in vitro, which led to cell cycle arrest in the G2/M phase, promoting this cell population to 73.42% ± 8.31% and 54.35% ± 11.26% at a concentration of 80 μM and 250.9 μM, respectively. Homoharringtonine did not show any effects on microtubules and cell cycle, while the known microtubule-stabilizing agent paclitaxel was found to inhibit tubulin polymerization in the presence of MAPs in vitro with an IC50 value of 38.19 ± 3.33 μM. Concerning actin filaments, sanguinarine, chelerythrine and chelidonine exhibited a certain effect on the cellular actin filament network by reducing the mass of actin filaments. The interactions of these cytotoxic alkaloids with microtubules and actin filaments present new insights into their molecular modes of action.
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Affiliation(s)
- Xiaojuan Wang
- Department of Biology, Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, INF 364, D-69120 Heidelberg, Germany.
| | - Mine Tanaka
- Department of Biology, Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, INF 364, D-69120 Heidelberg, Germany.
| | - Sonja Krstin
- Department of Biology, Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, INF 364, D-69120 Heidelberg, Germany.
| | - Herbenya Silva Peixoto
- Department of Biology, Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, INF 364, D-69120 Heidelberg, Germany.
| | - Michael Wink
- Department of Biology, Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, INF 364, D-69120 Heidelberg, Germany.
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20
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Havelek R, Seifrtova M, Kralovec K, Krocova E, Tejkalova V, Novotny I, Cahlikova L, Safratova M, Opletal L, Bilkova Z, Vavrova J, Rezacova M. Comparative cytotoxicity of chelidonine and homochelidonine, the dimethoxy analogues isolated from Chelidonium majus L. (Papaveraceae), against human leukemic and lung carcinoma cells. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2016; 23:253-66. [PMID: 26969379 DOI: 10.1016/j.phymed.2016.01.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 12/30/2015] [Accepted: 01/03/2016] [Indexed: 05/12/2023]
Abstract
BACKGROUND The search for new anticancer compounds is a crucial element of natural products research. PURPOSE In this study the effects of naturally occurring homochelidonine in comparison to chelidonine on cell cycle progression and cell death in leukemic T-cells with different p53 status are described. METHODS The mechanism of cytotoxic, antiproliferative, apoptosis-inducing effects and the effect on expressions of cell cycle regulatory proteins was investigated using XTT assay, Trypan blue exclusion assay, flow cytometry, Western blot analysis, xCELLigence, epi-fluorescence and 3D super resolution microscopy. A549 cells were used for xCELLigence, clonogenic assay and for monitoring microtubule stability. RESULTS We found that homochelidonine and chelidonine displayed significant cytotoxicity in examined blood cancer cells with the exception of HEL 92.1.7 and U-937 exposed to homochelidonine. Unexpectedly, homochelidonine and chelidonine-induced cytotoxicity was more pronounced in Jurkat cells contrary to MOLT-4 cells. Homochelidonine showed an antiproliferative effect on A549 cells but it was less effective compared to chelidonine. Biphasic dose-depended G1 and G2/M cell cycle arrest along with the population of sub-G1 was found after treatment with homochelidonine in MOLT-4 cells. In variance thereto, an increase in G2/M cells was detected after treatment with homochelidonine in Jurkat cells. Treatment with chelidonine induced cell cycle arrest in the G2/M cell cycle in both MOLT-4 and Jurkat cells. MOLT-4 and Jurkat cells treated with homochelidonine and chelidonine showed features of apoptosis such as phosphatidylserine exposure, a loss of mitochondrial membrane potential and an increase in the caspases -3/7, -8 and -9. Western blots indicate that homochelidonine and chelidonine exposure activates Chk1 and Chk2. Studies conducted with fluorescence microscopy demonstrated that chelidonine and homochelidonine inhibit tubulin polymerization in A549 cells. CONCLUSION Collectively, the data indicate that chelidonine and homochelidonine are potent inducers of cell death in cancer cell lines, highlighting their potential relevance in leukemic cells.
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Affiliation(s)
- Radim Havelek
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, Pardubice 532 10, Czech Republic.
| | - Martina Seifrtova
- Department of Medical Biochemistry, Faculty of Medicine in Hradec Kralove, Charles University in Prague, Simkova 870, Hradec Kralove 500 38, Czech Republic
| | - Karel Kralovec
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, Pardubice 532 10, Czech Republic
| | - Eliska Krocova
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, Pardubice 532 10, Czech Republic
| | - Veronika Tejkalova
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, Pardubice 532 10, Czech Republic
| | - Ivan Novotny
- Flow Cytometry and Light Microscopy, Institute of Molecular Genetics of the ASCR, Videnska 1083, Prague 142 20, Czech Republic
| | - Lucie Cahlikova
- ADINACO Research group, Department of Pharmaceutical Botany and Ecology, Faculty of Pharmacy, Charles University in Prague, Heyrovskeho 1203, Hradec Kralove 500 05, Czech Republic
| | - Marcela Safratova
- ADINACO Research group, Department of Pharmaceutical Botany and Ecology, Faculty of Pharmacy, Charles University in Prague, Heyrovskeho 1203, Hradec Kralove 500 05, Czech Republic
| | - Lubomir Opletal
- ADINACO Research group, Department of Pharmaceutical Botany and Ecology, Faculty of Pharmacy, Charles University in Prague, Heyrovskeho 1203, Hradec Kralove 500 05, Czech Republic
| | - Zuzana Bilkova
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, Pardubice 532 10, Czech Republic
| | - Jirina Vavrova
- Department of Radiobiology, Faculty of Military Health Sciences, University of Defence in Brno, Trebesska 1575, Hradec Kralove 500 01, Czech Republic
| | - Martina Rezacova
- Department of Medical Biochemistry, Faculty of Medicine in Hradec Kralove, Charles University in Prague, Simkova 870, Hradec Kralove 500 38, Czech Republic
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21
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Wang Q, Li X. Rhodium/copper-cocatalyzed annulation of benzylamines with diazo compounds: access to fused isoquinolines. Org Chem Front 2016. [DOI: 10.1039/c6qo00287k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Benzylamines undergo C–H activation and aerobic coupling with diazo compounds, leading to the synthesis of fused isoquinolines. This occurs via a mild synergistic rhodium- and copper-catalyzed process.
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Affiliation(s)
- Qiang Wang
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
- University of Chinese Academy of Sciences
| | - Xingwei Li
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
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22
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Qu Z, Zou X, Zhang X, Sheng J, Wang Y, Wang J, Wang C, Ji Y. Chelidonine induces mitotic slippage and apoptotic-like death in SGC-7901 human gastric carcinoma cells. Mol Med Rep 2015; 13:1336-44. [PMID: 26677104 DOI: 10.3892/mmr.2015.4683] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 11/24/2015] [Indexed: 11/05/2022] Open
Abstract
The aim of the present study was to investigate the effect of chelidonine on mitotic slippage and apoptotic-like death in SGC-7901 human gastric cancer cells. The MTT assay was performed to detect the antiproliferative effect of chelidonine. Following treatment with chelidonine (10 µmol/l), the ultrastructure changes in SGC-7901, MCF-7 and HepG2 cells were observed by transmission electron microscopy. The effects of chelidonine on G2/M phase arrest and apoptosis of SGC-7901 cells were determined by flow cytometry. Indirect immunofluorescence assay and laser scanning confocal microscopy (LSCM) were used to detect the phosphorylation level of histone H3 (Ser10) and microtubule formation was detected using LSCM following immunofluorescent labeling. Subsequent to treatment with chelidonine (10 µmol/l), expression levels of mitotic slippage-associated proteins, including BUB1 mitotic checkpoint serine/threonine kinase B (BubR1), cyclin-dependent kinase 1 (Cdk1) and cyclin B1, and apoptosis-associated protein, caspase-3 were examined by western blotting at 24, 48 and 72 h. The half maximal inhibitory concentration of chelidonine was 23.13 µmol/l over 48 h and chelidonine induced G2/M phase arrest of cells. The phosphorylation of histone H3 at Ser10 was significantly increased following treatment with chelidonine for 24 h, indicating that chelidonine arrested the SGC-7901 cells in the M phase. Chelidonine inhibited microtubule polymerization, destroyed microtubule structures and induced cell cycle arrest in the M phase. Giant cells were observed with multiple micronuclei of varying sizes, which indicated that following a prolonged arrest in the M phase, the cells underwent mitotic catastrophe. Western blotting demonstrated that the protein expression levels of BubR1, cyclin B1 and Cdk1 decreased significantly between 48 and 72 h. Low expression levels of BubR1 and inactivation of the cyclin B1-Cdk1 complex results in the cells being arrested at mitosis and leads to mitotic slippage. In addition, apoptotic morphological changes in multinucleated cells were observed, the apoptosis rates increased gradually with administration of chelidonine in a time-dependent manner and the protein levels of caspase-3 increased significantly between 24 and 72 h. Thus, chelidonine induces mitotic slippage, and apoptotic-like death occurs in SGC-7901 cells undergoing mitotic catastrophe. Gastric cancer is a common malignancy, and ranks second in overall cancer-associated mortalities worldwide. The present study demonstrated that chelidonine induces M phase arrest and mitotic slippage of SGC-7901 human gastric carcinoma cells via downregulating the expression of BubR1, Cdk1 and cyclin B1 proteins. With the prolongation of chelidonine treatment, the giant cells with multiple micronuclei underwent mitotic slippage and were maintained in the G1 phase and did not survive. A number of multinucleated cells underwent apoptosis via a caspase-dependent signaling pathway. The current study proposes that chelidonine induces mitotic slippage and apoptotic-like death of SGC-7901 cells.
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Affiliation(s)
- Zhongyuan Qu
- School of Pharmacy, Harbin University of Commerce, Harbin, Heilongjiang 150076, P.R. China
| | - Xiang Zou
- Engineering Research Center of Natural Antineoplastic Drugs, Harbin University of Commerce, Harbin, Heilongjiang 150076, P.R. China
| | - Xiujuan Zhang
- School of Pharmacy, Harbin University of Commerce, Harbin, Heilongjiang 150076, P.R. China
| | - Jiejing Sheng
- School of Pharmacy, Harbin University of Commerce, Harbin, Heilongjiang 150076, P.R. China
| | - Yumeng Wang
- Engineering Research Center of Natural Antineoplastic Drugs, Harbin University of Commerce, Harbin, Heilongjiang 150076, P.R. China
| | - Jiaqi Wang
- Engineering Research Center of Natural Antineoplastic Drugs, Harbin University of Commerce, Harbin, Heilongjiang 150076, P.R. China
| | - Chao Wang
- Engineering Research Center of Natural Antineoplastic Drugs, Harbin University of Commerce, Harbin, Heilongjiang 150076, P.R. China
| | - Yubin Ji
- Engineering Research Center of Natural Antineoplastic Drugs, Harbin University of Commerce, Harbin, Heilongjiang 150076, P.R. China
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23
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Salminen KA, Rahnasto-Rilla M, Väänänen R, Imming P, Meyer A, Horling A, Poso A, Laitinen T, Raunio H, Lahtela-Kakkonen M. Time-Dependent Inhibition of CYP2C19 by Isoquinoline Alkaloids: In Vitro and In Silico Analysis. Drug Metab Dispos 2015; 43:1891-904. [PMID: 26400396 DOI: 10.1124/dmd.115.065755] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 09/22/2015] [Indexed: 01/07/2023] Open
Abstract
The cytochrome P450 2C19 (CYP2C19) enzyme plays an important role in the metabolism of many commonly used drugs. Relatively little is known about CYP2C19 inhibitors, including compounds of natural origin, which could inhibit CYP2C19, potentially causing clinically relevant metabolism-based drug interactions. We evaluated a series (N = 49) of structurally related plant isoquinoline alkaloids for their abilities to interact with CYP2C19 enzyme using in vitro and in silico methods. We examined several common active alkaloids found in herbal products such as apomorphine, berberine, noscapine, and papaverine, as well as the previously identified mechanism-based inactivators bulbocapnine, canadine, and protopine. The IC50 values of the alkaloids ranged from 0.11 to 210 µM, and 42 of the alkaloids were confirmed to be time-dependent inhibitors of CYP2C19. Molecular docking and three-dimensional quantitative structure-activity relationship analysis revealed key interactions of the potent inhibitors with the enzyme active site. We constructed a comparative molecular field analysis model that was able to predict the inhibitory potency of a series of independent test molecules. This study revealed that many of these isoquinoline alkaloids do have the potential to cause clinically relevant drug interactions. These results highlight the need for studying more profoundly the potential interactions between drugs and herbal products. When further refined, in silico methods can be useful in the high-throughput prediction of P450 inhibitory potential of pharmaceutical compounds.
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Affiliation(s)
- Kaisa A Salminen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (K.A.S., M.R.-R., R.V., A.P., T.L., H.R., M.L.-K.); and Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany (P.I., A.M., A.H.)
| | - Minna Rahnasto-Rilla
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (K.A.S., M.R.-R., R.V., A.P., T.L., H.R., M.L.-K.); and Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany (P.I., A.M., A.H.)
| | - Raija Väänänen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (K.A.S., M.R.-R., R.V., A.P., T.L., H.R., M.L.-K.); and Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany (P.I., A.M., A.H.)
| | - Peter Imming
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (K.A.S., M.R.-R., R.V., A.P., T.L., H.R., M.L.-K.); and Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany (P.I., A.M., A.H.)
| | - Achim Meyer
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (K.A.S., M.R.-R., R.V., A.P., T.L., H.R., M.L.-K.); and Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany (P.I., A.M., A.H.)
| | - Aline Horling
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (K.A.S., M.R.-R., R.V., A.P., T.L., H.R., M.L.-K.); and Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany (P.I., A.M., A.H.)
| | - Antti Poso
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (K.A.S., M.R.-R., R.V., A.P., T.L., H.R., M.L.-K.); and Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany (P.I., A.M., A.H.)
| | - Tuomo Laitinen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (K.A.S., M.R.-R., R.V., A.P., T.L., H.R., M.L.-K.); and Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany (P.I., A.M., A.H.)
| | - Hannu Raunio
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (K.A.S., M.R.-R., R.V., A.P., T.L., H.R., M.L.-K.); and Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany (P.I., A.M., A.H.)
| | - Maija Lahtela-Kakkonen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland (K.A.S., M.R.-R., R.V., A.P., T.L., H.R., M.L.-K.); and Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany (P.I., A.M., A.H.)
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Mayank, Jaitak V. Molecular docking study of natural alkaloids as multi-targeted hedgehog pathway inhibitors in cancer stem cell therapy. Comput Biol Chem 2015; 62:145-54. [PMID: 26278973 DOI: 10.1016/j.compbiolchem.2015.08.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 08/03/2015] [Accepted: 08/03/2015] [Indexed: 01/13/2023]
Abstract
Cancer is responsible for millions of deaths throughout the world every year. Increased understanding as well as advancements in the therapeutic aspect seems suboptimal to restrict the huge deaths associated with cancer. The major cause responsible for this is high resistance as well as relapse rate associated with cancers. Several evidences indicated that cancer stem cells (CSC) are mainly responsible for the resistance and relapses associated with cancer. Furthermore, agents targeting a single protein seem to have higher chances of resistance than multitargeting drugs. According to the concept of network model, partial inhibition of multiple targets is more productive than single hit agents. Thus, by fusing both the premises that CSC and single hit anticancer drugs, both are responsible for cancer related resistances and screened alkaloids for the search of leads having CSC targeting ability as well as the capability to modulating multiple target proteins. The in silico experimental data indicated that emetine and cortistatin have the ability to modulate hedgehog (Hh) pathway by binding to sonic hedgehog (Hh), smoothened (Smo) and Gli protein, involved in maintenance CSCs. Furthermore, solamargine, solasonine and tylophorine are also seems to be good lead molecules targeting towards CSCs by modulating Hh pathway. Except solamargine and solasonine, other best lead molecules also showed acceptable in silico ADME profile. The predicted lead molecules can be suitably modified to get multitargeting CSC targeting agent to get rid of associate resistances.
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Affiliation(s)
- Mayank
- Centre for Chemical and Pharmaceutical Sciences, Central University of Punjab, Bathinda, PB 151001, India
| | - Vikas Jaitak
- Centre for Chemical and Pharmaceutical Sciences, Central University of Punjab, Bathinda, PB 151001, India.
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KIM OKHWA, HWANGBO CHEOL, KIM JUNHYEONG, LI DONGHAO, MIN BYUNGSUN, LEE JEONGHYUNG. Chelidonine suppresses migration and invasion of MDA-MB-231 cells by inhibiting formation of the integrin-linked kinase/PINCH/α-parvin complex. Mol Med Rep 2015; 12:2161-8. [DOI: 10.3892/mmr.2015.3621] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Accepted: 08/12/2014] [Indexed: 11/05/2022] Open
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Structure-activity relationship of benzophenanthridine alkaloids from Zanthoxylum rhoifolium having antimicrobial activity. PLoS One 2014; 9:e97000. [PMID: 24824737 PMCID: PMC4019524 DOI: 10.1371/journal.pone.0097000] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 04/15/2014] [Indexed: 11/19/2022] Open
Abstract
Zanthoxylum rhoifolium (Rutaceae) is a plant alkaloid that grows in South America and has been used in Brazilian traditional medicine for the treatment of different health problems. The present study was designed to evaluate the antimicrobial activity of the steam bark crude methanol extract, fractions, and pure alkaloids of Z. rhoifolium. Its stem bark extracts exhibited a broad spectrum of antimicrobial activity, ranging from 12.5 to 100 µg/mL using bioautography method, and from 125 to 500 µg/mL in the microdilution bioassay. From the dichloromethane basic fraction, three furoquinoline alkaloids (1-3), and nine benzophenanthridine alkaloids (4-12) were isolated and the antimicrobial activity of the benzophenanthridine alkaloids is discussed in terms of structure-activity relationships. The alkaloid with the widest spectrum of activity was chelerythrine (10), followed by avicine (12) and dihydrochelerythrine (4). The minimal inhibitory concentrations of chelerythrine, of 1.50 µg/mL for all bacteria tested, and between 3.12 and 6.25 µg/mL for the yeast tested, show this compound to be a more powerful antimicrobial agent when compared with the other active alkaloids isolated from Z. rhoifolium. To verify the potential importance of the methylenedioxy group (ring A) of these alkaloids, chelerythrine was selected to represent the remainder of the benzophenanthridine alkaloids isolated in this work and was subjected to a demethylation reaction giving derivative 14. Compared to chelerythrine, the derivative (14) was less active against the tested bacteria and fungi. Kinetic measurements of the bacteriolytic activities of chelerythrine against the bacteria Bacillus subtilis (Gram-positive) and Escherichia coli (Gram-negative) were determined by optical density based on real time assay, suggesting that its mechanism of action is not bacteriolytic. The present study did not detect hemolytic effects of chelerythrine on erythrocytes and found a protective effect considering the decrease in TBARS and AOPP (advanced oxidized protein products) levels when compared to the control group.
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Fryknäs M, Gullbo J, Wang X, Rickardson L, Jarvius M, Wickström M, Hassan S, Andersson C, Gustafsson M, Westman G, Nygren P, Linder S, Larsson R. Screening for phenotype selective activity in multidrug resistant cells identifies a novel tubulin active agent insensitive to common forms of cancer drug resistance. BMC Cancer 2013; 13:374. [PMID: 23919498 PMCID: PMC3751689 DOI: 10.1186/1471-2407-13-374] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 07/24/2013] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Drug resistance is a common cause of treatment failure in cancer patients and encompasses a multitude of different mechanisms. The aim of the present study was to identify drugs effective on multidrug resistant cells. METHODS The RPMI 8226 myeloma cell line and its multidrug resistant subline 8226/Dox40 was screened for cytotoxicity in response to 3,000 chemically diverse compounds using a fluorometric cytotoxicity assay (FMCA). Follow-up profiling was subsequently performed using various cellular and biochemical assays. RESULTS One compound, designated VLX40, demonstrated a higher activity against 8226/Dox40 cells compared to its parental counterpart. VLX40 induced delayed cell death with apoptotic features. Mechanistic exploration was performed using gene expression analysis of drug exposed tumor cells to generate a drug-specific signature. Strong connections to tubulin inhibitors and microtubule cytoskeleton were retrieved. The mechanistic hypothesis of VLX40 acting as a tubulin inhibitor was confirmed by direct measurements of interaction with tubulin polymerization using a biochemical assay and supported by demonstration of G2/M cell cycle arrest. When tested against a broad panel of primary cultures of patient tumor cells (PCPTC) representing different forms of leukemia and solid tumors, VLX40 displayed high activity against both myeloid and lymphoid leukemias in contrast to the reference compound vincristine to which myeloid blast cells are often insensitive. Significant in vivo activity was confirmed in myeloid U-937 cells implanted subcutaneously in mice using the hollow fiber model. CONCLUSIONS The results indicate that VLX40 may be a useful prototype for development of novel tubulin active agents that are insensitive to common mechanisms of cancer drug resistance.
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Affiliation(s)
- Mårten Fryknäs
- Department of Medical Sciences, Division of Clinical Pharmacology, Uppsala University, Uppsala, Sweden
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Herman B, Gudrun A, Potopalsky AI, Chroboczek J, Tcherniuk SO. Amitozyn impairs chromosome segregation and induces apoptosis via mitotic checkpoint activation. PLoS One 2013; 8:e57461. [PMID: 23505430 PMCID: PMC3591406 DOI: 10.1371/journal.pone.0057461] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 01/24/2013] [Indexed: 11/23/2022] Open
Abstract
Amitozyn (Am) is a semi-synthetic drug produced by the alkylation of major celandine (Chelidonium majus L.) alkaloids with the organophosphorous compound N,N'N'-triethylenethiophosphoramide (ThioTEPA). We show here that the treatment of living cells with Am reversibly perturbs the microtubule cytoskeleton, provoking a dose-dependent cell arrest in the M phase. Am changed the dynamics of tubulin polymerization in vitro, promoted the appearance of aberrant mitotic phenotypes in HeLa cells and induced apoptosis by the activation of caspase-9, caspase-3 and PARP, without inducing DNA breaks. Am treatment of HeLa cells induced changes in the phosphorylation of the growth suppressor pRb that coincided with maximum mitotic index. The dose-dependent and reversible anti-proliferative effect of Am was observed in several transformed cell lines. Importantly, the drug was also efficient against multidrug-resistant, paclitaxel-resistant or p53-deficient cells. Our results thus open the way to further pre-clinical evaluation of Am.
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Affiliation(s)
- Bastien Herman
- Institut de Biologie Structurale, Centre National de la Recherche Scientifique (CNRS), Grenoble, France
| | - Aldrian Gudrun
- Centre de Recherche de Biochimie Macromoléculaire, Centre National de la Recherche Scientifique (CNRS), Montpellier, France
| | - Anatoly I. Potopalsky
- Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine (NAN Ukraine), Kiev, Ukraine
| | - Jadwiga Chroboczek
- Institut de Biologie Structurale, Centre National de la Recherche Scientifique (CNRS), Grenoble, France
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences (PAN), Warsaw, Poland
- Thérapeutique Recombinante Expérimentale/Techniques de l’Ingénierie Médicale et de la Complexité/Informatique, Mathématiques et Applications de Grenoble (Therex/TIMC/IMAG), Centre National de la Recherche Scientifique (CNRS)/Université Joseph Fourier (UJF), Domaine de la Merci, La Tronche, France
| | - Sergey O. Tcherniuk
- Institut de Biologie Structurale, Centre National de la Recherche Scientifique (CNRS), Grenoble, France
- Centre de Recherche de Biochimie Macromoléculaire, Centre National de la Recherche Scientifique (CNRS), Montpellier, France
- Department of Biological Sciences, Academy of Young Scientists of Ukraine (AYSU), Kiev, Ukraine
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Kulp M, Bragina O. Capillary electrophoretic study of the synergistic biological effects of alkaloids from Chelidonium majus L. in normal and cancer cells. Anal Bioanal Chem 2013; 405:3391-7. [DOI: 10.1007/s00216-013-6755-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Revised: 01/08/2013] [Accepted: 01/16/2013] [Indexed: 11/24/2022]
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Isolani ME, Pietra D, Balestrini L, Borghini A, Deri P, Imbriani M, Bianucci AM, Batistoni R. The in vivo effect of chelidonine on the stem cell system of planarians. Eur J Pharmacol 2012; 686:1-7. [DOI: 10.1016/j.ejphar.2012.03.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 03/20/2012] [Accepted: 03/23/2012] [Indexed: 11/16/2022]
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Kulp M, Bragina O, Kogerman P, Kaljurand M. Capillary electrophoresis with LED-induced native fluorescence detection for determination of isoquinoline alkaloids and their cytotoxicity in extracts of Chelidonium majus L. J Chromatogr A 2011; 1218:5298-304. [PMID: 21726876 DOI: 10.1016/j.chroma.2011.06.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Revised: 06/03/2011] [Accepted: 06/06/2011] [Indexed: 10/18/2022]
Abstract
In this study, we introduced a simple and sensitive method of capillary electrophoresis with ultraviolet light-emitting diode-induced native fluorescence (UV-LEDIF) detection for the determination of isoquinoline alkaloids in extracts of Chelidonium majus L. Samples were extracted with acidic methanol and the extracts were directly analysed by CE. Simultaneous determination of protopine, chelidonine, coptisine, sanguinarine, allocryptopine, chelerythrine and stylopine was performed in 20mM phosphate buffer (pH 3.1). The baseline separation of these alkaloids was finished within 20 min. As these alkaloids have native fluorescence, they were directly detected using the commercially available UV light emitting diode without troublesome fluorescent derivatisation. Satisfactory LOD values were obtained for the studied compounds considering their appearance in natural extracts. Lower limits of detection were 0.05 μg/mL for protopine, 0.06 μg/mL for stylopine and allocryptopine, 0.07 μg/mL for chelidonine, 0.22 μg/mL for sanguinarine, 1.7 μg/mL for chelerythrine and 5.5 μg/mL for coptisine. The developed method was successfully applied to determine the contents of seven alkaloids in the aerial parts of Chelidonium majus L, which varied from 0.025 to 0.763% (w/w). Also, to demonstrate the potential of the proposed CE method, an estimation of the cytotoxic properties of selected Celandine alkaloids in a natural extract was carried out.
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Affiliation(s)
- Maria Kulp
- Tallinn University of Technology, Department of Chemistry, Akadeemia tee 15, Tallinn, Estonia.
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Donaldson LR, Wallace S, Haigh D, Patton EE, Hulme AN. Rapid synthesis and zebrafish evaluation of a phenanthridine-based small molecule library. Org Biomol Chem 2011; 9:2233-9. [PMID: 21298172 DOI: 10.1039/c0ob00449a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Heck cyclisation approach is described for the rapid synthesis of a library of natural product-like small molecules, based on the phenanthridine core. The synthesis of a range of substituted benzylamine building blocks and their incorporation into the library is reported, together with a highly selective cis-dihydroxylation protocol that enables access to the target compounds in an efficient manner. Biological evaluation of the library using zebrafish phenotyping has led to the discovery of compound 20c, a novel inhibitor of early-stage zebrafish embryo development.
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Affiliation(s)
- Lauren R Donaldson
- School of Chemistry, The University of Edinburgh, West Mains Road, Edinburgh, UK EH9 3JJ
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Hammerová J, Uldrijan S, Táborská E, Slaninová I. Benzo[c]phenanthridine alkaloids exhibit strong anti-proliferative activity in malignant melanoma cells regardless of their p53 status. J Dermatol Sci 2011; 62:22-35. [PMID: 21324654 DOI: 10.1016/j.jdermsci.2011.01.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Revised: 01/11/2011] [Accepted: 01/14/2011] [Indexed: 12/14/2022]
Abstract
BACKGROUND Search for new substances with antiproliferative activity towards melanoma cells is important since malignant melanoma is notoriously resistant to conventional chemotherapy. Benzo[c]phenanthridine alkaloids (BAs) are natural products with significant anti-proliferative activities, therefore they are considered as agents promising for cancer therapy. OBJECTIVES The effects of five BAs (sanguinarine, chelerythrine, chelidonine, sanguilutine, and chelilutine) on human malignant melanoma cell lines were compared. The study focused on BAs effects on DNA, anti-apoptotic and p53 protein levels; and the involvement of p53 in cellular responses to alkaloids treatment. METHODS Melanoma cell lines, two wild types and two with dysfunctional p53 derived from one of them were used. The mechanism of anti-proliferative and pro-apoptotic effects and the effect on DNA was investigated using MTT assay, flow cytometry, Western blot analysis, fluorescence and electron microscopy. RESULTS All tested alkaloids exhibit strong anti-proliferative activity. CHL, CHE and SA induced apoptosis, which was probably mediated by decreasing levels of anti-apoptotic proteins (Bcl-xL, Mcl-1, XIAP) and was accompanied by mitochondrial membrane potential decrease as well as caspase-3 and PARP cleavage. Although all alkaloids caused DNA damage, which was demonstrated by induction of H2AX phosphorylation, none of the tested alkaloids stabilised p53 and their toxicity in cells with non-functional p53 was comparable to wild type cells. CONCLUSION Despite the profound similarity of BAs molecular structures, it is clear that the mechanism of cell death induction is different for each alkaloid. Our results indicate that BAs could be effective in malignant melanoma treatment, including tumours which have lost wild type p53.
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Affiliation(s)
- Jindřiška Hammerová
- Department of Biology, Faculty of Medicine, Masaryk University, Kamenice 5, Building A16, 62500 Brno, Czech Republic
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Fuchino H, Kawano M, Mori-Yasumoto K, Sekita S, Satake M, Ishikawa T, Kiuchi F, Kawahara N. In vitro leishmanicidal activity of benzophenanthridine alkaloids from Bocconia pearcei and related compounds. Chem Pharm Bull (Tokyo) 2010; 58:1047-50. [PMID: 20686258 DOI: 10.1248/cpb.58.1047] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Leishmanicidal activities of benzophenanthridine alkaloids isolated from fruits of Bocconia pearcei and their derivatives were examined. Seven benzophenanthridine compounds were isolated from the methanolic extracts of B. pearcei. Among them, dihydrosanguinarine showed the most potent leishmanicidal activities (IC(50) value: 0.014 microg/ml, respectively). To examine the structure-activity relationship of the benzophenanthridine skeleton, the leishmanicidal activities for 32 synthetic samples were examined. The existence of bulky groups at the C(7)-C(8) position was found to enhance the activity. On the other hand, the bulkiness at the C(2)-C(3) position on the D-ring, a carbonyl group at C-6, substitution at C-6 and cleavage or saturation of the C(5)-C(6) bond reduced activity. A methyl group on nitrogen of the C-ring was thought to be necessary for significant activity.
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Affiliation(s)
- Hiroyuki Fuchino
- Research Center for Medicinal Plant Resources, National Institute of Biomedical Innovation, 1-2 Hachimandai, Tsukuba, Ibaraki, Japan.
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Kazemi Noureini S, Wink M. Transcriptional down regulation of hTERT and senescence induction in HepG2 cells by chelidonine. World J Gastroenterol 2009; 15:3603-10. [PMID: 19653337 PMCID: PMC2721233 DOI: 10.3748/wjg.15.3603] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the potential effects of chelidonine, the main alkaloid of Chelidonium majus, on telomerase activity and its regulation in HepG2 cells.
METHODS: Cytotoxicity of chelidonine for HepG2 cells was determined by neutral red assay. A modified polymerase chain reaction (PCR)-based telomerase repeat amplification protocol was used to estimate relative telomerase activity in chelidonine-treated cells in comparison with the untreated control cells. Relative expression level of the catalytic subunit of telomerase (hTERT) gene and P-glycoprotein (pgp) were estimated using semi-quantitative real-time reverse transcription-PCR (RT-PCR). Cell senescence in treated cells was demonstrated using a β-galactosidase test.
RESULTS: Cytotoxicity of chelidonine in HepG2 cells was not dose-dependent and tended to reach plateau immediately after the living cells were reduced in number to slightly higher than 50%. However, 12 &mgr;mol/L concentration of chelidonine was considered as LD50, where the maximal attainable effects were realized. Real-time RT-PCR data showed that the expression of pgp increased three-fold in chelidonine treated HepG2 cells in comparison with the untreated controls. Morphologically, treated HepG2 cells showed apoptotic features after 24 h and a small fraction of cells appeared with single blister cell death. The relative expression level of Bcl-2 dropped to less than 50% of control cells at a sub-apoptotic concentration of chelidonine and subsequently increased to higher than 120% at LD50. Telomerase activity was reduced considerably after administration of very low doses of chelidonine, whereas higher concentrations of chelidonine did not remarkably enhance the effect. Real-time RT-PCR experiments indicated a drastic decrease in expression level of hTERT subunit of telomerase under treatment with chelidonine. Repeated treatment of cells with very low doses of chelidonine caused a decline in growth rate by 4 wk and many of the cells appeared to be aged with large volume and dark staining in the β-galactosidase assay.
CONCLUSION: Chelidonine reduces telomerase activity through down-regulation of hTERT expression. Senescence induction might not be directly caused by reducing telomerase activity as it occurs after a few population doublings.
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Donaldson LR, Haigh D, Hulme AN. A study of Heck cyclization reactions to form phenanthridine ring systems. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.02.044] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Kaminskyy V, Kulachkovskyy O, Stoika R. A decisive role of mitochondria in defining rate and intensity of apoptosis induction by different alkaloids. Toxicol Lett 2008; 177:168-81. [DOI: 10.1016/j.toxlet.2008.01.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2007] [Revised: 01/14/2008] [Accepted: 01/16/2008] [Indexed: 11/29/2022]
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Fleming M, McManus H, Rudolph A, Chan W, Ruiz J, Dockendorff C, Lautens M. Concise Enantioselective Total Syntheses of (+)-Homochelidonine, (+)-Chelamidine, (+)-Chelidonine, (+)-Chelamine and (+)-Norchelidonine by a PdII-Catalyzed Ring-Opening Strategy. Chemistry 2008; 14:2112-24. [DOI: 10.1002/chem.200701775] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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McManus HA, Fleming MJ, Lautens M. Enantioselective Total Synthesis of (+)-Homochelidonine by a PdII-Catalyzed Asymmetric Ring-Opening Reaction of ameso-Azabicyclic Alkene with an Aryl Boronic Acid. Angew Chem Int Ed Engl 2007; 46:433-6. [PMID: 17146808 DOI: 10.1002/anie.200603945] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Helen A McManus
- Department of Chemistry, Davenport Chemical Laboratories, University of Toronto, 80 St. George St., Toronto, ON M5S 3H6, Canada
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McManus H, Fleming M, Lautens M. Enantioselective Total Synthesis of (+)-Homochelidonine by a PdII-Catalyzed Asymmetric Ring-Opening Reaction of ameso-Azabicyclic Alkene with an Aryl Boronic Acid. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200603945] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Wink M. Molecular modes of action of cytotoxic alkaloids: from DNA intercalation, spindle poisoning, topoisomerase inhibition to apoptosis and multiple drug resistance. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2007; 64:1-47. [PMID: 18085328 DOI: 10.1016/s1099-4831(07)64001-2] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Michael Wink
- Institute of Pharmacy and Molecular Biotechnology, University of Heidelberg, 69120 Heidelberg, Germany.
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Kemény-Beke A, Aradi J, Damjanovich J, Beck Z, Facskó A, Berta A, Bodnár A. Apoptotic response of uveal melanoma cells upon treatment with chelidonine, sanguinarine and chelerythrine. Cancer Lett 2006; 237:67-75. [PMID: 16019128 DOI: 10.1016/j.canlet.2005.05.037] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2005] [Revised: 05/08/2005] [Accepted: 05/22/2005] [Indexed: 11/16/2022]
Abstract
The benzophenanthridine alkaloids sanguinarine, chelerythrine and chelidonine were reported previously to provoke cell death in a variety of tumor cells suggesting their potential application as anticancer agents. Here we tested their effects on a primary human uveal melanoma cell line, OCM-1. Flow cytometric analysis of annexin V binding/PI exclusion and DNA fragmentation disclosed that all these alkaloids could induce apoptosis in OCM-1 cells. Moreover, necrotic cell death was also observed upon alkaloid treatment. As it was also evidenced by light microscopic inspection of cellular morphology, chelidonine primarily caused apoptosis, while sanguinarine and chelerythrine were effective via a so-termed bimodal cell death (apoptosis and primary necrosis). The relative efficiencies of the two modes depended on the applied dose. This study is the first implication for the possible use of these alkaloids in the therapy of uveal melanomas, for which no really efficient therapeutic regimen is available so far.
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Affiliation(s)
- Adám Kemény-Beke
- Department of Ophthalmology, Research Center for Molecular Medicine, Medical and Health Science Center, University of Debrecen, Nagyerdei krt. 98, H-4012 Debrecen, Hungary
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Correlation of the cytotoxic activity of four different alkaloids, from Chelidonium majus (greater celandine), with their DNA intercalating properties and ability to induce breaks in the DNA of NK/Ly murine lymphoma cells. Open Life Sci 2006. [DOI: 10.2478/s11535-006-0001-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractThe purpose of this study was to examine the relationship between the DNA intercalating characteristics and the DNA damaging capacity of four alkaloids extracted from Chelidonium majus L, as well as their toxicity towards murine NK/Ly lymphoma cells. Chelerythrine, sanguinarine and coptisine were found to be intercalated into the DNA isolated from NK/Ly cells, meanwhile, chelidonine exhibited no affinity to DNA. Sanguinarine exhibited the greatest toxicity toward NK/Ly cells, and the toxicity of the other three decreased in descending order: chelerythrine, coptisine and chelidonine. Chelerythrine and sanguinarine caused DNA damage, illustrated by the formation of comets of the third class. Coptisine was less toxic than chelerythrine and sanguinarine, and affected the formation the same class of comets in higher concentration. The quantity of comets induced by chelidonine were negligible, a finding consistent with its inability to intercalate into DNA structure. The ability of four main alkaloids of Chelidonium majus L., to intercalate into DNA isolated from murine NK/Ly lymphoma cells, correlated with their ability to induce breaks in cellular DNA and with their toxic effect towards those cells.
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Habermehl D, Kammerer B, Handrick R, Eldh T, Gruber C, Cordes N, Daniel PT, Plasswilm L, Bamberg M, Belka C, Jendrossek V. Proapoptotic activity of Ukrain is based on Chelidonium majus L. alkaloids and mediated via a mitochondrial death pathway. BMC Cancer 2006; 6:14. [PMID: 16417634 PMCID: PMC1379651 DOI: 10.1186/1471-2407-6-14] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2005] [Accepted: 01/17/2006] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The anticancer drug Ukrain (NSC-631570) which has been specified by the manufacturer as semisynthetic derivative of the Chelidonium majus L. alkaloid chelidonine and the alkylans thiotepa was reported to exert selective cytotoxic effects on human tumour cell lines in vitro. Few clinical trials suggest beneficial effects in the treatment of human cancer. Aim of the present study was to elucidate the importance of apoptosis induction for the antineoplastic activity of Ukrain, to define the molecular mechanism of its cytotoxic effects and to identify its active constituents by mass spectrometry. METHODS Apoptosis induction was analysed in a Jurkat T-lymphoma cell model by fluorescence microscopy (chromatin condensation and nuclear fragmentation), flow cytometry (cellular shrinkage, depolarisation of the mitochondrial membrane potential, caspase-activation) and Western blot analysis (caspase-activation). Composition of Ukrain was analysed by mass spectrometry and LC-MS coupling. RESULTS Ukrain turned out to be a potent inducer of apoptosis. Mechanistic analyses revealed that Ukrain induced depolarisation of the mitochondrial membrane potential and activation of caspases. Lack of caspase-8, expression of cFLIP-L and resistance to death receptor ligand-induced apoptosis failed to inhibit Ukrain-induced apoptosis while lack of FADD caused a delay but not abrogation of Ukrain-induced apoptosis pointing to a death receptor independent signalling pathway. In contrast, the broad spectrum caspase-inhibitor zVAD-fmk blocked Ukrain-induced cell death. Moreover, over-expression of Bcl-2 or Bcl-xL and expression of dominant negative caspase-9 partially reduced Ukrain-induced apoptosis pointing to Bcl-2 controlled mitochondrial signalling events. However, mass spectrometric analysis of Ukrain failed to detect the suggested trimeric chelidonine thiophosphortriamide or putative dimeric or monomeric chelidonine thiophosphortriamide intermediates from chemical synthesis. Instead, the Chelidonium majus L. alkaloids chelidonine, sanguinarine, chelerythrine, protopine and allocryptopine were identified as major components of Ukrain. Apart from sanguinarine and chelerythrine, chelidonine turned out to be a potent inducer of apoptosis triggering cell death at concentrations of 0.001 mM, while protopine and allocryptopine were less effective. Similar to Ukrain, apoptosis signalling of chelidonine involved Bcl-2 controlled mitochondrial alterations and caspase-activation. CONCLUSION The potent proapoptotic effects of Ukrain are not due to the suggested "Ukrain-molecule" but to the cytotoxic efficacy of Chelidonium majus L. alkaloids including chelidonine.
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Affiliation(s)
- Daniel Habermehl
- Department of Radiation Oncology, University Hospital of Tuebingen, Hoppe-Seyler-Str. 3, D-72076 Tuebingen, Germany
| | - Bernd Kammerer
- Institute of Pharmacology and Toxicology, Division of Clinical Pharmacology, University Hospital of Tuebingen, Otfried-Mueller-Str. 45, D-72076 Tuebingen, Germany
| | - René Handrick
- Department of Radiation Oncology, University Hospital of Tuebingen, Hoppe-Seyler-Str. 3, D-72076 Tuebingen, Germany
| | - Therese Eldh
- Department of Radiation Oncology, University Hospital of Tuebingen, Hoppe-Seyler-Str. 3, D-72076 Tuebingen, Germany
| | - Charlotte Gruber
- Department of Radiation Oncology, University Hospital of Tuebingen, Hoppe-Seyler-Str. 3, D-72076 Tuebingen, Germany
| | - Nils Cordes
- OncoRay – Radiation Research in Oncology, Medical Faculty Carl Gustav Carus, Technical University Dresden, Fetscherstrasse 74, D-01307 Dresden, Germany
| | - Peter T Daniel
- Department of Clinical and Molecular Oncology, University Medical Center Charité, Campus Buch, Humboldt University, Lindenbergerweg 80, D-13125 Berlin, Germany
| | - Ludwig Plasswilm
- University Hospital, Department of Radiation Oncology, Petersgraben 4, Ch-4031 Basel, Switzerland
| | - Michael Bamberg
- Department of Radiation Oncology, University Hospital of Tuebingen, Hoppe-Seyler-Str. 3, D-72076 Tuebingen, Germany
| | - Claus Belka
- Department of Radiation Oncology, University Hospital of Tuebingen, Hoppe-Seyler-Str. 3, D-72076 Tuebingen, Germany
| | - Verena Jendrossek
- Department of Radiation Oncology, University Hospital of Tuebingen, Hoppe-Seyler-Str. 3, D-72076 Tuebingen, Germany
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Ernst E, Schmidt K. Ukrain - a new cancer cure? A systematic review of randomised clinical trials. BMC Cancer 2005; 5:69. [PMID: 15992405 PMCID: PMC1180428 DOI: 10.1186/1471-2407-5-69] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2005] [Accepted: 07/01/2005] [Indexed: 11/10/2022] Open
Abstract
Background Ukrain is an anticancer drug based on the extract of the plant Chelidonium majus L. Numerous pre-clinical and clinical investigations seem to suggest that Ukrain is pharmacologically active and clinically effective. We wanted therefore to critically evaluate the clinical trial data in the form of a systematic review. Methods Seven electronic databases were searched for all relevant randomised clinical trials. Data were extracted and validated by both authors, tabulated and summarised narratively. The methodological quality was assessed with the Jadad score. Results Seven trials met our inclusion criteria. Without exception, their findings suggest that Ukrain has curative effects on a range of cancers. However, the methodological quality of most studies was poor. In addition, the interpretation of several trials was impeded by other problems. Conclusion The data from randomised clinical trials suggest Ukrain to have potential as an anticancer drug. However, numerous caveats prevent a positive conclusion, and independent rigorous studies are urgently needed.
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Affiliation(s)
- E Ernst
- Complementary Medicine, Peninsula Medical School, Universities of Exeter & Plymouth, 25 Victoria Park Road, Exeter EX2 4NT
| | - K Schmidt
- Complementary Medicine, Peninsula Medical School, Universities of Exeter & Plymouth, 25 Victoria Park Road, Exeter EX2 4NT
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JOUBERT A, LOTTERING ML, PANZER A. Influence of chelidonine, an inhibitor of tubulin polymerisation on tyrosine kinase activity in normal, transformed and malignant cell lines. Biomed Res 2004. [DOI: 10.2220/biomedres.25.27] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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