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Chen JQ, Chen YY, Du X, Tao HJ, Pu ZJ, Shi XQ, Yue SJ, Zhou GS, Shang EX, Tang YP, Duan JA. Fuzzy identification of bioactive components for different efficacies of rhubarb by the back propagation neural network association analysis of UPLC-Q-TOF/MS E and integrated effects. Chin Med 2022; 17:50. [PMID: 35473719 PMCID: PMC9040240 DOI: 10.1186/s13020-022-00612-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 04/14/2022] [Indexed: 11/15/2022] Open
Abstract
Background Rhei Radix et Rhizoma (rhubarb), as one of the typical representatives of multi-effect traditional Chinese medicines (TCMs), has been utilized in the treatment of various diseases due to its multicomponent nature. However, there are few systematic investigations for the corresponding effect of individual components in rhubarb. Hence, we aimed to develop a novel strategy to fuzzily identify bioactive components for different efficacies of rhubarb by the back propagation (BP) neural network association analysis of ultra-performance liquid chromatography/quadrupole time-of-flight mass spectrometry for every data (UPLC-Q-TOF/MSE) and integrated effects. Methods Through applying the fuzzy chemical identification, most components of rhubarb were classified into different chemical groups. Meanwhile the integration effect values of different efficacies can be determined by animal experiment evaluation and multi-attribute comprehensive indexes. Then the BP neural network was employed for association analysis of components and different efficacies by correlating the component contents determined from UPLC-Q-TOF/MSE profiling and the integration effect values. Finally, the effect contribution of one type of components may be totaled to demonstrate the universal and individual characters for different efficacies of rhubarb. Results It suggested that combined anthraquinones, flavanols and their polymers may be the universal character to the multi-functional properties of rhubarb. Other components contributed to the individuality of rhubarb efficacies, including stilbene glycosides, anthranones and their dimers, free anthraquinones, chromones, gallic acid and gallotannins, butyrylbenzenes and their glycosides. Conclusions Our findings demonstrated that the bioactive components for different efficacies of rhubarb were not exactly the same and can be systematically differentiated by the network-oriented strategy. These efforts will advance our knowledge and understanding of the bioactive components in rhubarb and provide scientific evidence to support the expansion of its use in clinical applications and the further development of some products based on this medicinal herb. Supplementary information The online version contains supplementary material available at 10.1186/s13020-022-00612-9.
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Affiliation(s)
- Jia-Qian Chen
- Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility, State Key Laboratory of Research & Development of Characteristic Qin Medicine Resources (Cultivation), Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, Shaanxi Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Shaanxi University of Chinese Medicine, 712046, Xi'an, Shaanxi Province, China.,Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, 210023, Nanjing, Jiangsu Province, China
| | - Yan-Yan Chen
- Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility, State Key Laboratory of Research & Development of Characteristic Qin Medicine Resources (Cultivation), Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, Shaanxi Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Shaanxi University of Chinese Medicine, 712046, Xi'an, Shaanxi Province, China
| | - Xia Du
- Shaanxi Academy of Traditional Chinese Medicine, 710003, Xi'an, Shaanxi Province, China
| | - Hui-Juan Tao
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, 210023, Nanjing, Jiangsu Province, China
| | - Zong-Jin Pu
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, 210023, Nanjing, Jiangsu Province, China
| | - Xu-Qin Shi
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, 210023, Nanjing, Jiangsu Province, China
| | - Shi-Jun Yue
- Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility, State Key Laboratory of Research & Development of Characteristic Qin Medicine Resources (Cultivation), Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, Shaanxi Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Shaanxi University of Chinese Medicine, 712046, Xi'an, Shaanxi Province, China
| | - Gui-Sheng Zhou
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, 210023, Nanjing, Jiangsu Province, China
| | - Er-Xin Shang
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, 210023, Nanjing, Jiangsu Province, China
| | - Yu-Ping Tang
- Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility, State Key Laboratory of Research & Development of Characteristic Qin Medicine Resources (Cultivation), Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, Shaanxi Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Shaanxi University of Chinese Medicine, 712046, Xi'an, Shaanxi Province, China.
| | - Jin-Ao Duan
- Jiangsu Key Laboratory for High Technology Research of TCM Formulae, Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, 210023, Nanjing, Jiangsu Province, China
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Semwal RB, Semwal DK, Combrinck S, Viljoen A. Emodin - A natural anthraquinone derivative with diverse pharmacological activities. PHYTOCHEMISTRY 2021; 190:112854. [PMID: 34311280 DOI: 10.1016/j.phytochem.2021.112854] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/19/2021] [Accepted: 06/20/2021] [Indexed: 06/13/2023]
Abstract
Emodin (1,3,8-trihydroxy-6-methyl-anthraquinone) is a natural anthraquinone derivative that is present in numerous globally renowned herbal medicines. It is recognised as a protein tyrosine kinase inhibitor and as an anticancer drug, active against various tumour cells, including lung, breast, liver, and ovarian cancer cells. Recently, its role in combination chemotherapy with various allopathic medicines, to minimize their toxicity and to enhance their efficacy, has been studied. The use of emodin in these therapies is gaining popularity, due to fewer associated side effects compared with standard anticancer drugs. Emodin has a broad therapeutic window, and in addition to its antineoplastic activity, it displays anti-ulcer, anti-inflammatory, hepatoprotective, neuroprotective, antimicrobial, muscle relaxant, immunosuppressive and antifibrotic activities, in both in vitro and in vivo models. Although reviews on the anticancer activity of emodin have been published, none coherently unite all the pharmacological properties of emodin, particularly the anti-oxidant, antimicrobial, antidiabetic, immunosuppressive and hepatoprotective activities of the compound. Hence, in this review, all of the available data regarding the pharmacological properties of emodin are explored, with particular emphasis on the modes of action of the molecule. In addition, the manuscript details the occurrence, biosynthesis and chemical synthesis of the compound, as well as its toxic effects on biotic systems.
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Affiliation(s)
- Ruchi Badoni Semwal
- Department of Pharmaceutical Sciences, Faculty of Science, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa; Department of Chemistry, Pt. Lalit Mohan Sharma Govt. Post Graduate College, Rishikesh, 249201, India
| | - Deepak Kumar Semwal
- Department of Pharmaceutical Sciences, Faculty of Science, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa; Department of Phytochemistry, Faculty of Biomedical Sciences, Uttarakhand Ayurved University, Harrawala, Dehradun, 248001, India
| | - Sandra Combrinck
- Department of Pharmaceutical Sciences, Faculty of Science, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa
| | - Alvaro Viljoen
- Department of Pharmaceutical Sciences, Faculty of Science, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa; SAMRC Herbal Drugs Research Unit, Faculty of Science, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa.
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The Health Benefits of Emodin, a Natural Anthraquinone Derived from Rhubarb-A Summary Update. Int J Mol Sci 2021; 22:ijms22179522. [PMID: 34502424 PMCID: PMC8431459 DOI: 10.3390/ijms22179522] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 08/27/2021] [Accepted: 08/30/2021] [Indexed: 02/07/2023] Open
Abstract
Emodin (6-methyl-1,3,8-trihydroxyanthraquinone) is a naturally occurring anthraquinone derivative found in roots and leaves of various plants, fungi and lichens. For a long time it has been used in traditional Chinese medicine as an active ingredient in herbs. Among other sources, it is isolated from the rhubarb Rheum palmatum or tuber fleece-flower Polygonam multiflorum. Emodin has a wide range of biological activities, including diuretic, antibacterial, antiulcer, anti-inflammatory, anticancer and antinociceptive. According to the most recent studies, emodin acts as an antimalarial and antiallergic agent, and can also reverse resistance to chemotherapy. In the present work the potential therapeutic role of emodin in treatment of inflammatory diseases, cancers and microbial infections is analysed.
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Emodin induces collagen type I synthesis in Hs27 human dermal fibroblasts. Exp Ther Med 2021; 21:420. [PMID: 33747160 DOI: 10.3892/etm.2021.9864] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 12/17/2020] [Indexed: 12/12/2022] Open
Abstract
Fibrillar collagen and elastic fibers are the main components of the dermal extracellular matrix (ECM), which confers mechanical strength and resilience to the skin. In particular, type I collagen produced by fibroblasts is the most abundant collagen that determines the general strength of the ECM, thereby contributing to the prevesntion of the skin-aging process. Although the natural anthraquinone derivative emodin (1,3,8-trihydroxy-6-methylanthraquinone) exerts numerous beneficial effects, including antiviral, anticancer, anti-inflammatory and wound-healing effects in diverse cells, the effect of emodin on collagen expression or skin aging is not fully understood. The present study demonstrated that exposure to emodin increased type I collagen synthesis in a concentration- and time-dependent manner in Hs27 human dermal fibroblasts. Subsequent experiments showed that emodin strongly increased collagen type I levels without altering cell proliferation or cellular matrix metalloproteinase-1 (MMP-1) expression. Additionally, it was determined that increased phosphorylation of 5' AMP-activated protein kinase, following emodin treatment, was responsible for increased type I collagen synthesis. These findings clearly indicate that emodin plays an important role in collagen type I synthesis in dermal fibroblasts, thereby making it a potential drug candidate for treating skin aging and wrinkles.
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Characterization and Comparative Analysis of Two Rheum Complete Chloroplast Genomes. BIOMED RESEARCH INTERNATIONAL 2020; 2020:6490164. [PMID: 32685515 PMCID: PMC7327605 DOI: 10.1155/2020/6490164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 04/05/2020] [Accepted: 05/12/2020] [Indexed: 12/19/2022]
Abstract
Rheum species present a significant economic value. Traditional Chinese medicine rhubarb is an important medicinal material in China. It has a long history of use, with a record of use as early as two thousand years ago. Here, we determined the complete chloroplast genome sequences of Rheum nobile and Rheum acuminatum and comprehensively compared them to two other available Rheum cp genomes at the genome scale. The results revealed cp genomes ranging in size from 159,051 to 161,707 bp with a similar typical quadripartite and circular structure. The genome organization, gene numbers, gene order, and GC contents of these four Rheum cp genomes were similar to those of many angiosperm cp genomes. Repeats and microsatellites were detected in the R. nobile and R. acuminatum cp genomes. The Mauve alignment revealed that there were no rearrangements in the cp genomes of the four Rheum species. Thirteen mutational hotspots for genome divergence were identified, which could be utilized as potential markers for phylogenetic studies and the identification of Rheum species. The phylogenetic relationships of the four species showed that the members of Rheum cluster into a single clade, indicating their close relationships. Our study provides valuable information for the taxonomic, phylogenetic, and evolutionary analysis of Rheum.
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Chen C, Cao T, Li Y, Hu Y, Yang H, Yin S. Synthesized Derivatives of Aloe-Emodin as Proliferation Inhibitors for Human Breast Adenocarcinoma, Human Nonsmall Cell Lung Carcinoma, and Human Cervix Carcinoma. Chem Nat Compd 2020. [DOI: 10.1007/s10600-020-02937-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Isolation and in silico prediction of potential drug-like compounds from Anethum sowa L. root extracts targeted towards cancer therapy. Comput Biol Chem 2019; 78:242-259. [DOI: 10.1016/j.compbiolchem.2018.11.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 10/22/2018] [Accepted: 11/28/2018] [Indexed: 12/16/2022]
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Tantapakul C, Promgool T, Kanokmedhakul K, Soytong K, Song J, Hadsadee S, Jungsuttiwong S, Kanokmedhakul S. Bioactive xanthoquinodins and epipolythiodioxopiperazines from Chaetomium globosum 7s-1, an endophytic fungus isolated from Rhapis cochinchinensis (Lour.) Mart. Nat Prod Res 2018; 34:494-502. [PMID: 30449167 DOI: 10.1080/14786419.2018.1489392] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A new xanthoquinodin B9 (1), together with two known xanthoquinodins, xanthoquinodin A1 (2) and xanthoquinodin A3 (3), three epipolythiodioxopiperazines, chetomin (4), chaetocochin C (5) and dethio-tetra(methylthio)chetomin (6), and four other compounds, chrysophanol (7), emodin (8), alatinone (9), and ergosterol (10) were isolated from the endophytic fungus Chaetomium globosum 7s-1, isolated from Rhapis cochinchinensis (Lour.) Mart. All isolated structures were established based on their spectroscopic data analyses. Compounds 1-6 showed antibacterial activity against Gram positive bacteria with MICs ranging from 0.02 pM to 10.81 µM. Compounds 1-6 also exhibited cytotoxicity against KB, MCF-7 and NCI-H187 cancer cell lines (IC50 0.04-18.40 µM). However, they were cytotoxic towards a normal cell line (Vero cell) with IC50 values ranging from 0.04 to 3.86 µM.
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Affiliation(s)
- Cholpisut Tantapakul
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Trinop Promgool
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Kwanjai Kanokmedhakul
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
| | - Kasem Soytong
- Department of Plant Production Technology, Faculty of Agricultural Technology, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand
| | - Jiaojiao Song
- Department of Plant Production Technology, Faculty of Agricultural Technology, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand
| | - Sarinya Hadsadee
- Center for Organic Electronic and Alternative Energy, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani, Thailand
| | - Siriporn Jungsuttiwong
- Center for Organic Electronic and Alternative Energy, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani, Thailand
| | - Somdej Kanokmedhakul
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
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Chen Z, Shen L, Yang C, Jiang J, Liu X. Metabolic analysis of the effect of rheum on a taurocholate-induced acute pancreatitis rat model. BRAZ J PHARM SCI 2017. [DOI: 10.1590/s2175-97902017000215022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Zhonghua Chen
- Sichuan University, China; Sichuan University, China
| | | | | | | | - Xing Liu
- The Children’s Hospital Chongqing Medical University, People’ s Republic of China
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Rapid Determination of Total Content of Five Major Anthraquinones in Rhei Radix et Rhizoma by NIR Spectroscopy. CHINESE HERBAL MEDICINES 2017. [DOI: 10.1016/s1674-6384(17)60101-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Zheng Y, Zhu L, Fan L, Zhao W, Wang J, Hao X, Zhu Y, Hu X, Yuan Y, Shao J, Wang W. Synthesis, SAR and pharmacological characterization of novel anthraquinone cation compounds as potential anticancer agents. Eur J Med Chem 2017; 125:902-913. [DOI: 10.1016/j.ejmech.2016.10.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 10/05/2016] [Accepted: 10/06/2016] [Indexed: 01/10/2023]
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Lin X, Yu M, Lin T, Zhang L. Secondary metabolites of Xylaria sp., an endophytic fungus from Taxus mairei. Nat Prod Res 2016; 30:2442-7. [DOI: 10.1080/14786419.2016.1198350] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Xiao Lin
- Medical College, Xiamen University, Xiamen, China
- School of Life Sciences, Xiamen University, Xiamen, China
| | - Miao Yu
- School of Life Sciences, Xiamen University, Xiamen, China
- School of Life Sciences, Ningxia University, Yinchuan, China
| | - Ting Lin
- School of Pharmaceutical Sciences, Xiamen University, Xiamen, China
| | - Lianru Zhang
- School of Life Sciences, Xiamen University, Xiamen, China
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Onoda T, Li W, Sasaki T, Miyake M, Higai K, Koike K. Identification and evaluation of magnolol and chrysophanol as the principle protein tyrosine phosphatase-1B inhibitory compounds in a Kampo medicine, Masiningan. JOURNAL OF ETHNOPHARMACOLOGY 2016; 186:84-90. [PMID: 27049294 DOI: 10.1016/j.jep.2016.03.063] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 03/16/2016] [Accepted: 03/30/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Masiningan is a traditional medicine consisting of six crude drugs that have been used for treating constipation and diabetes mellitus in both Japan and China. Masiningan has been reported to have significant PTP1B inhibitory activity and to affect cells in the insulin-signaling pathway. The aim of the present study is to identify the PTP1B inhibitory compounds in Masiningan. MATERIALS AND METHODS Bioactivity peaks were identified by analytical HPLC profiling and PTP1B inhibitory activity profiling of sub-fractions from Masiningan extract. The bioactive compounds were isolated by tracking two identified bioactive peaks, and the chemical structures were determined by spectroscopic analyses. The bioactive compounds were further investigated for their inhibitory effect against PTP1B by enzymatic kinetic analysis, molecular docking simulation, inhibitory selectivity against other PTPs, and cellular activity in the insulin signal transduction pathway. RESULTS From Masiningan, magnolol (1) and chrysophanol (2) were isolated as compounds that exhibited significant dose-dependent inhibitory activities against PTP1B, with IC50 values of 24.6 and 12.3μM, respectively. Kinetic analysis revealed that 1 is a non-competitive and that 2 is a competitive PTP1B inhibitor. In the molecular docking simulation, compound 2 was stably positioned in the active pocket of PTP1B, and the CDOCKER energy was calculated to be 24.3411kcal/mol. Both compounds demonstrated remarkably high selectivity against four PTPs and revealed cellular activity against the insulin signal transduction pathway. CONCLUSIONS Magnolol (1) and chrysophanol (2) were identified as the principle PTP1B inhibitory active compounds in Masiningan, and their actions were investigated in detail. These findings demonstrated the effectiveness of Masiningan on diabetes mellitus through the inhibition of PTP1B at a molecular level as well as the potential of magnolol (1) and chrysophanol (2) as lead compounds in future anti-diabetes drug development.
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Affiliation(s)
- Toshihisa Onoda
- Faculty of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi, Chiba 274-8510, Japan; Toho University Sakura Medical Center, Shimoshidu 564-1, Sakura, Chiba 285-8741, Japan.
| | - Wei Li
- Faculty of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi, Chiba 274-8510, Japan.
| | - Tatsunori Sasaki
- Faculty of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi, Chiba 274-8510, Japan.
| | - Megumi Miyake
- Faculty of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi, Chiba 274-8510, Japan.
| | - Koji Higai
- Faculty of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi, Chiba 274-8510, Japan.
| | - Kazuo Koike
- Faculty of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi, Chiba 274-8510, Japan.
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Fouillaud M, Venkatachalam M, Girard-Valenciennes E, Caro Y, Dufossé L. Anthraquinones and Derivatives from Marine-Derived Fungi: Structural Diversity and Selected Biological Activities. Mar Drugs 2016; 14:E64. [PMID: 27023571 PMCID: PMC4849068 DOI: 10.3390/md14040064] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 02/12/2016] [Accepted: 03/08/2016] [Indexed: 12/11/2022] Open
Abstract
Anthraquinones and their derivatives constitute a large group of quinoid compounds with about 700 molecules described. They are widespread in fungi and their chemical diversity and biological activities recently attracted attention of industries in such fields as pharmaceuticals, clothes dyeing, and food colorants. Their positive and/or negative effect(s) due to the 9,10-anthracenedione structure and its substituents are still not clearly understood and their potential roles or effects on human health are today strongly discussed among scientists. As marine microorganisms recently appeared as producers of an astonishing variety of structurally unique secondary metabolites, they may represent a promising resource for identifying new candidates for therapeutic drugs or daily additives. Within this review, we investigate the present knowledge about the anthraquinones and derivatives listed to date from marine-derived filamentous fungi's productions. This overview highlights the molecules which have been identified in microorganisms for the first time. The structures and colors of the anthraquinoid compounds come along with the known roles of some molecules in the life of the organisms. Some specific biological activities are also described. This may help to open doors towards innovative natural substances.
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Affiliation(s)
- Mireille Fouillaud
- Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments-LCSNSA EA 2212, Université de la Réunion, 15 Avenue René Cassin, CS 92003, F-97744 Saint-Denis Cedex 9, Ile de la Réunion, France.
- Ecole Supérieure d'Ingénieurs Réunion Océan Indien-ESIROI, 2 Rue Joseph Wetzell, F-97490 Sainte-Clotilde, Ile de la Réunion, France.
| | - Mekala Venkatachalam
- Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments-LCSNSA EA 2212, Université de la Réunion, 15 Avenue René Cassin, CS 92003, F-97744 Saint-Denis Cedex 9, Ile de la Réunion, France.
| | - Emmanuelle Girard-Valenciennes
- Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments-LCSNSA EA 2212, Université de la Réunion, 15 Avenue René Cassin, CS 92003, F-97744 Saint-Denis Cedex 9, Ile de la Réunion, France.
| | - Yanis Caro
- Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments-LCSNSA EA 2212, Université de la Réunion, 15 Avenue René Cassin, CS 92003, F-97744 Saint-Denis Cedex 9, Ile de la Réunion, France.
- Ecole Supérieure d'Ingénieurs Réunion Océan Indien-ESIROI, 2 Rue Joseph Wetzell, F-97490 Sainte-Clotilde, Ile de la Réunion, France.
| | - Laurent Dufossé
- Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments-LCSNSA EA 2212, Université de la Réunion, 15 Avenue René Cassin, CS 92003, F-97744 Saint-Denis Cedex 9, Ile de la Réunion, France.
- Ecole Supérieure d'Ingénieurs Réunion Océan Indien-ESIROI, 2 Rue Joseph Wetzell, F-97490 Sainte-Clotilde, Ile de la Réunion, France.
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Liu X, Li H, Wu L, Xing J, Poh Y, Cai H, Cai BC. Simultaneous quantification of chrysophanol and physcion in rat plasma by ultra fast liquid chromatography–tandem mass spectrometry and application of the technique to comparative pharmacokinetic studies of Radix et Rhei Rhizoma extract alone and Dahuang Fuzi Decoction. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 980:88-93. [DOI: 10.1016/j.jchromb.2014.11.025] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Revised: 09/09/2014] [Accepted: 11/24/2014] [Indexed: 01/27/2023]
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Li YJ, Huang HM, Ye Q, Hou LF, Yu WB, Jia JH, Gao JR. The Construction of Polysubstituted Aromatic Core Derivativesviaa Cycloaddition/Oxidative Aromatization Sequence from Quinone and β-Enamino Esters. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300892] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Shrimali D, Shanmugam MK, Kumar AP, Zhang J, Tan BKH, Ahn KS, Sethi G. Targeted abrogation of diverse signal transduction cascades by emodin for the treatment of inflammatory disorders and cancer. Cancer Lett 2013; 341:139-49. [PMID: 23962559 DOI: 10.1016/j.canlet.2013.08.023] [Citation(s) in RCA: 193] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 08/09/2013] [Accepted: 08/12/2013] [Indexed: 01/01/2023]
Abstract
Emodin (1,3,8-trihydroxy-6-methylanthraquinone) is a natural occurring anthraquinone derivative isolated from roots and barks of numerous plants, molds, and lichens. It is found as an active ingredient in different Chinese herbs including Rheum palmatum and Polygonam multiflorum, and has diuretic, vasorelaxant, anti-bacterial, anti-viral, anti-ulcerogenic, anti-inflammatory, and anti-cancer effects. The anti-inflammatory effects of emodin have been exhibited in various in vitro as well as in vivo models of inflammation including pancreatitis, arthritis, asthma, atherosclerosis and glomerulonephritis. As an anti-cancer agent, emodin has been shown to suppress the growth of various tumor cell lines including hepatocellular carcinoma, pancreatic, breast, colorectal, leukemia, and lung cancers. Emodin is a pleiotropic molecule capable of interacting with several major molecular targets including NF-κB, casein kinase II, HER2/neu, HIF-1α, AKT/mTOR, STAT3, CXCR4, topoisomerase II, p53, p21, and androgen receptors which are involved in inflammation and cancer. This review summarizes reported anti-inflammatory and anti-cancer effects of emodin, and re-emphasizes its potential therapeutic role in the treatment of inflammatory diseases and cancer.
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Affiliation(s)
- Deepti Shrimali
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
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He L, Bi JJ, Guo Q, Yu Y, Ye XF. Effects of emodin extracted from Chinese herbs on proliferation of non-small cell lung cancer and underlying mechanisms. Asian Pac J Cancer Prev 2013; 13:1505-10. [PMID: 22799356 DOI: 10.7314/apjcp.2012.13.4.1505] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
To aim of this was to observe emodin-mediated cytotoxicity and its influence on Rad51 and ERCC1 expressionin non-small cell lung cancer (NSCLC). NSCLC cells were cultured in vitro with emodin at various concentrations (0, 25, 50, 75 and 100 μmol/L) for 48 h and the proliferation inhibition rate was determined by the MTT method. Then, NSCLC were treated with emodin (SK-MES-1 40 μmol/L, A549 70 μmol/L) or 20 μmol/L U0126 (an ERK inhibitor) for 48 h, or with various concentrations of emodin for 48 h and the protein and mRNA expressions of ERCC1 and Rad51 were determined by RT-PCR and Western blot assay, respectively. Emodin exerted a suppressive effect on the proliferation of NSCLC in a concentration dependent manner. Protein and mRNA expression of ERCC1 and Rad51 was also significantly decreased with the dose. Vacuolar degeneration was observed in A549 and SK-MES-1 cell lines after emodin treatment by transmission electron microscopy. Emodin may thus inhibited cell proliferation in NSCLC cells by downregulation ERCC1 and Rad51.
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Affiliation(s)
- Lin He
- Department of Pathology, Institute of Neuroscience, Chongqing Key Laboratory of Neurobiology, Chongqing Medical University, Chongqing, China
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Masaldan S, Iyer VV. Exploration of effects of emodin in selected cancer cell lines: enhanced growth inhibition by ascorbic acid and regulation of LRP1 and AR under hypoxia-like conditions. J Appl Toxicol 2012; 34:95-104. [PMID: 23212659 DOI: 10.1002/jat.2838] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2012] [Revised: 09/22/2012] [Accepted: 10/03/2012] [Indexed: 12/25/2022]
Abstract
This study explores the link between the antiproliferative activity of emodin through the generation of reactive oxygen species (ROS) in various cancer cell lines and the expression of the androgen receptor (AR) in the prostate cancer cell lines LNCaP (androgen-sensitive) and PC-3 (androgen-refractory), as well as the pro-metastatic low-density lipoprotein receptor-related protein 1 (LRP1) in the above prostate cancer cells and the nonprostate cell lines A549 (lung), HCT-15 (colon) and MG-63 (bone) under normoxic and hypoxia-like conditions. Among all cell lines, emodin showed most growth inhibition in LNCaP, followed by A549. The mechanism of cytotoxicity of emodin was postulated to be the widely reported ROS generation, based on the observations of poor in vitro radical-scavenging activity and increased growth inhibition of emodin by ascorbic acid (AA) pre-treatment owing to the additive effects of ROS generation by emodin and pro-oxidant effects of AA. Emodin downregulated AR in LNCaP under normoxic and hypoxia-like conditions (simulated by CoCl(2)) and LRP1 under normoxia. Emodin upregulated LRP1 in other cell lines, except HCT-15, under normoxic, and even more markedly under hypoxia-like conditions. The downregulation of AR in LNCaP and upregulation of LRP1 in all cell lines, except HCT-15, under hypoxia-like conditions along with growth inhibition by emodin, suggests that emodin may be a useful therapeutic option against androgen-sensitive prostate cancer and other such LRP1-expressing cancers to attempt the targeting of the elevated LRP1 levels to allow the uptake of emodin and/or any other accompanying therapeutic agents by LRP1.
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Affiliation(s)
- Shashank Masaldan
- Centre for Bio-Separation Technology, VIT University, Vellore, 632014, Tamil Nadu, India
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Fotia C, Avnet S, Granchi D, Baldini N. The natural compound Alizarin as an osteotropic drug for the treatment of bone tumors. J Orthop Res 2012; 30:1486-92. [PMID: 22411621 DOI: 10.1002/jor.22101] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Accepted: 02/16/2012] [Indexed: 02/04/2023]
Abstract
Despite significant clinical improvements, conventional therapies for bone cancer treatment are limited by significant systemic toxicity and lack of specific targeting. In this study, we considered Alizarin, a natural hydroxyanthraquinone derived from madder root with high affinity to calcium and remarkable osteotropic features, as a novel approach for bone cancer treatment. Due to its antitumor properties, as demostrated in colon cancer cells, and to its tropism to bone, Alizarin may be an ideal drug to reduce bone tumor growth. We demonstrated that low dosages of Alizarin strongly inhibited the osteosarcoma (IC(50) for Saos-2, MG-63, and U-2 OS cells, 27.5, 29.0, and 69.9 µg/ml, respectively) and breast carcinoma (IC(50) for MDA-MB-231 cells, 62.1 µg/ml) cell proliferation in vitro. Importantly, Alizarin had a significantly lower inhibitory activity on normal cells (IC(50) for MSC, 828.6 µg/ml), thereby revealing a selective activity towards malignant cells. Furthermore, we found that Alizarin acted through the inhibition of ERK phosphorylation and cell cycle arrest in the S-phase. Finally, Alizarin significantly and strongly impaired both osteosarcoma and breast cancer tumorigenesis. Our results highlight a selective and effective inhibitory activity of Alizarin towards cancerous cells, laying the basis for further studies to investigate its application in bone cancer therapy.
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Affiliation(s)
- Caterina Fotia
- Laboratory for Pathophysiology, Istituto Ortopedico Rizzoli, Bologna, Italy.
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Shao J, Zhang F, Bai Z, Wang C, Yuan Y, Wang W. Synthesis and antitumor activity of emodin quaternary ammonium salt derivatives. Eur J Med Chem 2012; 56:308-19. [PMID: 22901410 DOI: 10.1016/j.ejmech.2012.07.047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2012] [Revised: 07/20/2012] [Accepted: 07/26/2012] [Indexed: 10/28/2022]
Abstract
A series of new emodin derivatives modified at the C-3 and the C-6 positions were synthesized, and evaluated for their anticancer activities in vitro and in vivo. Among them, Compounds 5g and 5h had more significant antiproliferative ability against HepG2, BGC-823, AGS cancer cell lines and low cytotoxicity to HELF normal cell line, respectively. Compounds 5g and 5h induced AGS cell cycle arrest at G0/G1 phase and induce apoptosis via activation of caspase-3 and caspase-9 enzyme. In vivo studies using H22 xenografts in Kunming mice were conducted with 5g and 5h. The results revealed that the medium dosage group (10 mg/kg) of 5g and the high dosage group (25 mg/kg) of 5h showed significant antitumor activity compared to the control group.
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Affiliation(s)
- Jingwei Shao
- Department of Pharmaceutical Engineering, College of Chemistry and Chemical Engineering, Fuzhou University, Fujian 350108, PR China
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Santos JDFL, Pagani E, Ramos J, Rodrigues E. Observations on the therapeutic practices of riverine communities of the Unini River, AM, Brazil. JOURNAL OF ETHNOPHARMACOLOGY 2012; 142:503-515. [PMID: 22659194 DOI: 10.1016/j.jep.2012.05.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Revised: 04/17/2012] [Accepted: 05/15/2012] [Indexed: 06/01/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Parts and products of animals and plants, like exudates, have been used for medicinal and/or toxic purposes by various human groups throughout history. However, few ethnopharmacological studies have engaged their rescue. AIM OF THE STUDY To perform a broad ethnopharmacological survey of the local medicine practiced by traditional healing experts living in relative isolation at seven communities within the Amazon rainforest, in order to provide the basis for further pharmacological studies of the most promising findings. MATERIALS AND METHODS The field work was conducted using an ethnographic approach with the assistance of a doctor. Plants and animals, as well as their products and derivatives, reported by the practitioners as being involved in healing practices were collected, identified and deposited in scientific collections. RESULTS A total of 33 traditional healing experts were selected and interviewed; they described themselves as: healer, midwife, knowledgeable of natural drugs or 'desmintidor' (an expert in massage techniques for the treatment of muscle contractures and joint sprains). In this therapeutic practice, 122 plant species, belonging to 60 botanical families, were indicated and collected; the most frequently mentioned families were: Fabaceae s.l. (10%), Arecaceae (6%), Zingiberaceae (5%) and Lamiaceae (5%). Plant exudates from 14 of those plant species were also indicated and collected, with those from the Burseraceae family being the most common. Furthermore, 57 animals belonging to 35 taxonomic families were indicated. They most frequently belonged to 2 families of bony fishes: Cichlidae (14%) and Characidae (9%). Plants and animals were indicated for 67 therapeutic uses and grouped into 21 usage categories; the psychoactive category was associated with the greatest number of used resources (17%), followed by the cultural syndromes category (16.7%). CONCLUSIONS The geographic isolation and limited access to medical care in these communities resulted in unique, rich and consistent therapeutic system. There was a high degree of agreement among interviewees regarding the use of the same resources especially in the categories: psychoactive, cultural syndromes, pregnancy and childbirth, and inflammatory processes, suggesting a high degree of repetition and intercommunication. Further pharmacological and phytochemical investigations may search for new bioactive compounds among the described resources.
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Yang X, Sun G, Yang C, Wang B. Novel rhein analogues as potential anticancer agents. ChemMedChem 2011; 6:2294-301. [PMID: 21954017 DOI: 10.1002/cmdc.201100384] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2011] [Indexed: 11/10/2022]
Abstract
Two series of rhein analogues were synthesized with modification at the 3-position. Their cytotoxicities were evaluated using an MTT assay. Among all the compounds synthesized, one compound showed the best potency, with an IC(50) value of 2.7 μM against the HeLa cell line and 0.6 μM against the MOLT4 cell line.
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Affiliation(s)
- Xiaochuan Yang
- Department of Chemistry and Center for Diagnostics and Therapeutics, Georgia State University, 100 Piedmont Ave., Atlanta, GA 30303-4098, USA
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The use of response surface methodology to optimize the ultrasound-assisted extraction of five anthraquinones from Rheum palmatum L. Molecules 2011; 16:5928-37. [PMID: 21765390 PMCID: PMC6264690 DOI: 10.3390/molecules16075928] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 07/07/2011] [Accepted: 07/11/2011] [Indexed: 11/17/2022] Open
Abstract
In this paper, ultrasound-assisted extraction (UAE) was applied to the extraction of anthraquinones (aloe-emodin, rhein, emodin, chrysophanol and physcion) from Rheum palmatum L. The five anthraquinones were quantified and analyzed by high performance liquid chromatography coupled with UV detection (HPLC-UV). The extraction solvent, extraction temperature and extraction time parameters, the three main factors for UAE, were optimized with response surface methodology (RSM) to obtain the highest extraction efficiency. The optimal conditions were the use of 84% methanol as solvent, an extraction time of 33 min and an extraction temperature of 67 °C. Under these optimal conditions, the experimental values agreed closely with the predicted values. The analysis of variance indicated a high goodness of model fit and the success of RSM method for optimizing anthraquinones extraction in Rheum palmatum L.
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Zheng Y, Huang W, Yoo JG, Ebersole JL, Huang CB. Antibacterial compounds fromSiraitia grosvenoriileaves. Nat Prod Res 2011; 25:890-7. [DOI: 10.1080/14786419.2010.490212] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Siddiqui IN, Zahoor A, Hussain H, Ahmed I, Ahmad VU, Padula D, Draeger S, Schulz B, Meier K, Steinert M, Kurtán T, Flörke U, Pescitelli G, Krohn K. Diversonol and blennolide derivatives from the endophytic fungus Microdiplodia sp.: absolute configuration of diversonol. JOURNAL OF NATURAL PRODUCTS 2011; 74:365-373. [PMID: 21244021 DOI: 10.1021/np100730b] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Chemical investigation of the fungal strain Microdiplodia sp. isolated from the shrub Lycium intricatum led to the isolation of four new compounds: a hexahydroxanthone (2), a 2,3-dihydrochroman-4-one (3), a 7-oxoxanthone derivative (4), and a 1,4-oxazepan-7-one (5). The relative configurations of the new compounds were determined by intensive NMR investigations, notably NOESY experiments at different temperatures. The absolute configurations of the well-known fungal metabolite diversonol (1) and of other xanthone derivatives (3, 4) were established by means of TDDFT ECD calculations. Most of the metabolites were biologically active, with antibacterial activity against Legionella pneumophila and/or antifungal activity against Microbotryum violaceum.
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Affiliation(s)
- Imran Nafees Siddiqui
- Department of Chemistry, University of Paderborn, Warburger Strasse 100, 33098-Paderborn, Germany
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Gautam R, Srivastava A, Jachak SM. Simultaneous determination of naphthalene and anthraquinone derivatives in Rumex nepalensis Spreng. roots by HPLC: comparison of different extraction methods and validation. PHYTOCHEMICAL ANALYSIS : PCA 2011; 22:153-157. [PMID: 21046683 DOI: 10.1002/pca.1261] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Revised: 05/18/2010] [Accepted: 06/01/2010] [Indexed: 05/30/2023]
Abstract
INTRODUCTION Rumex nepalensis contains mainly anthraquinone and naphthalene derivatives. Although HPLC methods have been reported for the analysis of anthraquinones, neither a phytochemical analysis of Rumex species nor the simultaneous determination of anthraquinone and naphthalene derivatives in other samples has been reported so far. OBJECTIVE To develop and validate a HPLC method for the simultaneous determination of anthraquinone and naphthalene derivatives in R. nepalensis roots. METHODOLOGY Anthraquinones and naphthalenes were extracted from R. nepalensis roots by three methods (reflux, ultrasonication and pressurized liquid extraction) using methanol. Separation was achieved on an RP C₁₈ column with a gradient mobile phase consisting of 0.05% orthophosphoric acid in water (solvent A) and methanol (solvent B) using a UV detector (254 nm). RESULTS Small differences were observed in the contents of anthraquinone and naphthalene derivatives extracted by the three methods. Chrysophanol-8-O-β-D-glucopyranoside and nepodin were detected as major constituents. The method showed a good linearity (r² > 0.9992), high precision (RSD < 5%) and a good recovery (97-105%) of the compounds. The lowest detection limit was found to be 0.97 ng and the method was found to be robust. CONCLUSION Reflux and ultrasonication were found to be the best suited methods for the extraction of glycosides and aglycones, respectively. The developed and validated HPLC method is simple, precise and accurate; and can hence be recommended as the method of choice for the analysis of anthraquinones and naphthalenes in R. nepalensis and other Rumex species for both quality control as well as routine analytical purposes.
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Affiliation(s)
- Raju Gautam
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), Sector-67, SAS Nagar, Mohali-160062 (Punjab), India
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Zheng L, Dong D. Development and Validation of an HPLC Method for Simultaneous Determination of Nine Active Components in ‘Da-Chai-Hu-Tang’. Chin Med 2011. [DOI: 10.4236/cm.2011.21004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Modulation of Rad51, ERCC1, and thymidine phosphorylase by emodin result in synergistic cytotoxic effect in combination with capecitabine. Biochem Pharmacol 2010; 81:680-90. [PMID: 21168393 DOI: 10.1016/j.bcp.2010.12.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Revised: 12/06/2010] [Accepted: 12/08/2010] [Indexed: 11/23/2022]
Abstract
Thymidine phosphorylase (TP) is the rate-limiting enzyme for the activation of capecitabine (pro-drug of fluorouracil), and as a useful predictor of tumor response to capecitabine-based chemotherapy. Overexpression of Rad51 and ERCC1 induce resistance to chemotherapeutic agents. Emodin, one of the main bioactive anthraquinone derivatives in the roots and rhizomes of numerous plants, possesses potent antitumor effects. Accordingly, we aimed to explore the molecular mechanism of emodin enhances the capecitabine-induced cytotoxicity through controlling Rad51, ERCC1, and TP expression in human non-small cell lung cancer (NSCLC). The results show that capecitabine increases the phosphorylation of MKK1/2-ERK1/2 and protein levels of Rad51 and ERCC1 through enhancing the protein stability. Depletion of endogenous Rad51 or ERCC1 expression by specific small interfering RNA transfection significantly increases capecitabine-induced cell death and growth inhibition. Emodin enhances the capecitabine-induced cytotoxic effects through ERK1/2 inactivation and decreasing the Rad51 and ERCC1 protein levels induced by capecitabine. Enhancement of ERK1/2 signaling by constitutively active MKK1/2 (MKK1/2-CA) results in increasing Rad51 and ERCC1 protein levels and cell viability in NSCLC cell lines treated with emodin and capecitabine. Interestingly, emodin enhances TP mRNA and protein expression in capecitabine treated NSCLC cell lines, and depletion of the TP expression decreases the cytotoxic effects induced by capecitabine and emodin. We conclude that enhancing the cytotoxicity to capecitabine by emodin is mediated by down-regulation the expression of Rad51 and ERCC1 and up-regulation TP expression.
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Sob SVT, Wabo HK, Tchinda AT, Tane P, Ngadjui BT, Ye Y. Anthraquinones, sterols, triterpenoids and xanthones from Cassia obtusifolia. BIOCHEM SYST ECOL 2010. [DOI: 10.1016/j.bse.2010.02.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ko JC, Su YJ, Lin ST, Jhan JY, Ciou SC, Cheng CM, Lin YW. Suppression of ERCC1 and Rad51 expression through ERK1/2 inactivation is essential in emodin-mediated cytotoxicity in human non-small cell lung cancer cells. Biochem Pharmacol 2010; 79:655-64. [PMID: 19799875 DOI: 10.1016/j.bcp.2009.09.024] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2009] [Revised: 09/22/2009] [Accepted: 09/22/2009] [Indexed: 01/20/2023]
Abstract
Emodin, a tyrosine kinase inhibitor, is a natural anthraquinone derivative found in the roots and rhizomes of numerous plants. Emodin exhibits anticancer effects against a variety of cancer cells, including lung cancer cells. ERCC1 and Rad51 proteins are essential for nucleotide excision repair and homologous recombination, respectively. Furthermore, ERCC1 and Rad51 overexpression induces resistance to DNA-damaging agents that promote DNA double-strand breaks. Accordingly, the aim of this study was to determine the role of ERCC1 and Rad51 in emodin-mediated cytotoxicity in human non-small cell lung cancer (NSCLC) cells. Both ERCC1 and Rad51 protein levels as well as mRNA levels were decreased in four different NSCLC cell lines after exposure to emodin. These decreases correlated with the inactivation of the MKK1/2-ERK1/2 pathway. Moreover, cellular ERCC1 and Rad51 protein and mRNA levels were specifically inhibited by U0126, a MKK1/2 inhibitor. We found that transient transfection of human NSCLC cells with si-ERCC1 or si-Rad51 RNA and cotreatment with U0126 could enhance emodin-induced cytotoxicity. In contrast, overexpression of constitutively active MKK1/2 vectors (MKK1/2-CA) was shown to significantly recover reduced phospho-ERK1/2, ERCC1, and Rad51 protein levels and to rescue cell viability upon emodin treatment. These results demonstrate that activation of the MKK1/2-ERK1/2 pathway is the upstream signal regulating the expressions of ERCC1 and Rad51, which are suppressed by emodin to induce cytotoxicity in NSCLC cells.
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Affiliation(s)
- Jen-Chung Ko
- Department of Internal Medicine, Hsinchu Hospital, Department of Health, The Executive Yuan, Taiwan
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Su YJ, Tsai MS, Kuo YH, Chiu YF, Cheng CM, Lin ST, Lin YW. Role of Rad51 down-regulation and extracellular signal-regulated kinases 1 and 2 inactivation in emodin and mitomycin C-induced synergistic cytotoxicity in human non-small-cell lung cancer cells. Mol Pharmacol 2009; 77:633-43. [PMID: 20042515 DOI: 10.1124/mol.109.061887] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Emodin (1,3,8-trihydroxy-6-methyl-anthraquinone) is a natural anthraquinone derivative found in the roots and rhizomes of numerous plants. It is a tyrosine kinase inhibitor and has anticancer effects on lung cancer. Rad51 plays a central role in homologous recombination, and high levels of Rad51 expression are observed in chemo- or radioresistant carcinomas. Our previous studies have shown that the mitogen-activated protein kinase kinase (MKK) 1/2-extracellular signal-regulated kinase (ERK) 1/2 signal pathway maintains the expression of Rad51. Therefore, in this study, we hypothesized that emodin could enhance the effects of the antitumor antibiotic mitomycin C (MMC)-mediated cytotoxicity by decreasing the expression of Rad51 and the phosphorylation of ERK1/2. Exposure of the human non-small-cell lung cancer H1703 or A549 cell lines to emodin decreased the MMC-elicited phosphorylated ERK1/2 and Rad51 levels. Moreover, emodin significantly decreased the MMC-elicited Rad51 mRNA and protein levels by increasing the instability of Rad51 mRNA and protein. In emodin- and MMC-cotreated cells, ERK1/2 phosphorylation was enhanced by constitutively active MKK1/2 (MKK1/2-CA), thus increasing Rad51 protein levels and protein stability. The synergistic cytotoxic effects induced by emodin combined with MMC were remarkably decreased by MKK1-CA-mediated enhancement of ERK1/2 activation. Depletion of endogenous Rad51 expression by small interfering Rad51 RNA transfection significantly enhanced MMC-induced cell death and cell growth inhibition. In contrast, overexpression of Rad51 protects lung cancer cells from the synergistic cytotoxic effects induced by emodin and MMC. We conclude that suppression of Rad51 expression or a combination of emodin with chemotherapeutic agents may be considered as potential therapeutic modalities for lung cancer.
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Affiliation(s)
- Ying-Jhen Su
- Molecular Oncology Laboratory, Department of Biochemical Science and Technology, National Chiayi University, Chiayi, Taiwan
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Ko JC, Su YJ, Lin ST, Jhan JY, Ciou SC, Cheng CM, Chiu YF, Kuo YH, Tsai MS, Lin YW. Emodin enhances cisplatin-induced cytotoxicity via down-regulation of ERCC1 and inactivation of ERK1/2. Lung Cancer 2009; 69:155-64. [PMID: 19962780 DOI: 10.1016/j.lungcan.2009.10.013] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2009] [Revised: 10/22/2009] [Accepted: 10/26/2009] [Indexed: 12/11/2022]
Abstract
Emodin, a tyrosine kinase inhibitor, is a natural anthraquinone derivative found in the roots and rhizomes of numerous plants; it exhibits an anticancer effect on many malignancies. The most important chemotherapeutic agent for patients with advanced non-small cell lung cancer (NSCLC) is a platinum-containing compound such as cisplatin or carboplatin. The molecular mechanism underlying decreased NSCLC cell viability after treatment with emodin and cisplatin is unclear. Therefore, the aim of this study was to assess the cytotoxic effect of combined emodin and cisplatin on NSCLC cell lines and to clarify underlying molecular mechanisms. Exposure of human NSCLC cells to emodin decreased cisplatin-elicited ERK1/2 activation and ERCC1 protein induction by increasing instability of ERCC1 protein. Cisplatin alone did not affect expression of ERCC1 mRNA. However, emodin alone or combined with cisplatin significantly decreased expression of ERCC1 mRNA levels. Enhancement of ERK1/2 activation by transfection with constitutively active MKK1/2 (MKK1/2-CA) vector increased ERCC1 protein levels and protein stability, as well as increasing viability of NSCLC cells treated with emodin and cisplatin. In contrast, blocking ERK1/2 activation by U0126 (an MKK1/2 inhibitor) decreased cisplatin-elicited ERCC1 expression and enhanced cisplatin-induced cytotoxicity. Depletion of endogenous ERCC1 expression by si-ERCC1 RNA transfection significantly enhanced cisplatin's cytotoxic effect. In conclusion, ERCC1 protein protects NSCLC cells from synergistic cytotoxicity induced by emodin and platinum agents. Further investigation of combined emodin and cisplatin may lead to novel therapy in the future for NSCLC through down-regulating expression of ERCC1.
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Affiliation(s)
- Jen-Chung Ko
- Department of Internal Medicine, Hsinchu Hospital, Department of Health, The Executive Yuan, Taiwan
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Gonnot V, Antheaume C, Nicolas M, Mioskowski C, Baati R. Highly Selective Three-Step Synthesis of Rhein in Chloroaluminate Molten Salt: Preclusion of the Hayashi Rearrangement. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900960] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Zhang W, Sun J, Wang Y, Liu X, Sun Y, Lu R, He Z. Screening and Identification of Permeable Components of Radix et Rhizoma Rhei Extract by Use of Immobilized Artificial Membrane Chromatography. Chromatographia 2009. [DOI: 10.1365/s10337-009-1342-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Lu B, Liu Y, Yin L, Wang X, Peng J. Simple and reliable methods for the determination of sixteen marker components for quality control of Daochi pill by HPLC coupled with diode array detection. PHYTOCHEMICAL ANALYSIS : PCA 2009; 20:385-394. [PMID: 19533595 DOI: 10.1002/pca.1138] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
INTRODUCTION Traditional Chinese medicine plays a very important role in the healthcare system of China and thus the quality control of medicinal herb products is of paramount concern. OBJECTIVE To establish a simple and effective high-performance liquid chromatography (HPLC) method to evaluate the quality of Daochi pill. METHODOLOGY Two HPLC methods were developed for the determination of 16 marker components in Daochi pills. In method A, the analytes were separated on a Lichrosorb C(18) column using a gradient elution of methanol and 1% aqueous phosphoric acid (pH 2.9, adjusted by triethylamine). In method B, the separation was achieved on an Agilent Eclipse Plus C(18) column using a gradient elution of methanol and 3% aqueous phosphoric acid (pH 2.0, adjusted by triethylamine) in a gradient elution mode. RESULTS Methods were linear over the range 0.27-500 microg/mL (r(2) >or= 0.9995). Accuracy, precision and repeatability were all within the required limits. The mean recoveries measured at three concentrations were higher than 95% with RSD <or= 4% for the targets. CONCLUSION The established methods are simple and can be used as tools for quality evaluation and control of this natural product.
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Affiliation(s)
- Binan Lu
- College of Pharmacy, Dalian Medical University, Dalian, China
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Aviello G, Rowland I, Gill CI, Acquaviva AM, Capasso F, McCann M, Capasso R, Izzo AA, Borrelli F. Anti-proliferative effect of rhein, an anthraquinone isolated from Cassia species, on Caco-2 human adenocarcinoma cells. J Cell Mol Med 2009; 14:2006-14. [PMID: 19538468 PMCID: PMC3823282 DOI: 10.1111/j.1582-4934.2009.00815.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
In recent years, the use of anthraquinone laxatives, in particular senna, has been associated with damage to the intestinal epithelial layer and an increased risk of developing colorectal cancer. In this study, we evaluated the cytotoxicity of rhein, the active metabolite of senna, on human colon adenocarcinoma cells (Caco-2) and its effect on cell proliferation. Cytotoxicity studies were performed using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT), neutral red (NR) and trans-epithelial electrical resistance (TEER) assays whereas 3H-thymidine incorporation and Western blot analysis were used to evaluate the effect of rhein on cell proliferation. Moreover, for genoprotection studies Comet assay and oxidative biomarkers measurement (malondialdehyde and reactive oxygen species) were used. Rhein (0.1–10 μg/ml) had no significant cytotoxic effect on proliferating and differentiated Caco-2 cells. Rhein (0.1 and 1 μg/ml) significantly reduced cell proliferation as well as mitogen-activated protein (MAP) kinase activation; by contrast, at high concentration (10 μg/ml) rhein significantly increased cell proliferation and extracellular-signal-related kinase (ERK) phosphorylation. Moreover, rhein (0.1–10 μg/ml): (i) did not adversely affect the integrity of tight junctions and hence epithelial barrier function; (ii) did not induce DNA damage, rather it was able to reduce H2O2-induced DNA damage and (iii) significantly inhibited the increase in malondialdehyde and reactive oxygen species (ROS) levels induced by H2O2/Fe2+. Rhein was devoid of cytotoxic and genotoxic effects in colon adenocarcinoma cells. Moreover, at concentrations present in the colon after a human therapeutic dosage of senna, rhein inhibited cell proliferation via a mechanism that seems to involve directly the MAP kinase pathway. Finally, rhein prevents the DNA damage probably via an anti-oxidant mechanism.
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Affiliation(s)
- Gabriella Aviello
- Department of Experimental Pharmacology, University of Naples Federico II, Naples, Italy
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Chen RS, Jhan JY, Su YJ, Lee WT, Cheng CM, Ciou SC, Lin ST, Chuang SM, Ko JC, Lin YW. Emodin enhances gefitinib-induced cytotoxicity via Rad51 downregulation and ERK1/2 inactivation. Exp Cell Res 2009; 315:2658-72. [PMID: 19505457 DOI: 10.1016/j.yexcr.2009.06.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2009] [Revised: 05/12/2009] [Accepted: 06/03/2009] [Indexed: 01/24/2023]
Abstract
Emodin, a tyrosine kinase inhibitor, is a natural anthraquinone derivative found in the roots and rhizomes of numerous plants. It reportedly exhibits an anticancer effect on lung cancer. Gefitinib (Iressa) is a selective epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor for human non-small cell lung cancer (NSCLC). However, the molecular mechanism of how emodin combined with gefitinib decreases NSCLC cell viability is unclear. The recombinase protein Rad51 is essential for homologous recombination repair, and Rad51 overexpression is resistant to DNA double-strand break-inducing cancer therapies. In this study, we found that emodin enhanced the cytotoxicity induced by gefitinib in two NSCLC cells lines, A549 and H1650. Emodin at low doses of 2-10 microM did not affect ERK1/2 activation, mRNA, and Rad51 protein levels; however, it enhanced a gefitinib-induced decrease in phospho-ERK1/2 and Rad51 protein levels by enhancing Rad51 protein instability. Expression of constitutively active MKK1/2 vectors (MKK1/2-CA) significantly rescued the reduced phospho-ERK1/2 and Rad51 protein levels as well as cell viability on gefitinib and emodin cotreatment. Blocking of ERK1/2 activation by U0126 (an MKK1/2 inhibitor) lowered Rad51 protein levels and cell viability in emodin-treated H1650 and A549 cells. Knockdown of Rad51 expression by transfection with si-Rad51 RNA enhanced emodin cytotoxicity. In contrast, Rad51 overexpression protected the cells from the cytotoxic effects induced by emodin and gefitinib. Consequently, emodin-gefitinib cotreatment may serve as the basis for a novel and better therapeutic modality in the management of advanced lung cancer.
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Affiliation(s)
- Ruey-Shyang Chen
- Molecular Genetics of Microorganisms Laboratory, Department of Biochemical Science and Technology, National Chiayi University, Chiayi, Taiwan
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Abstract
BACKGROUND AND AIMS In chronic liver injury, hepatic stellate cells (HSCs) acquire an activated phenotype, migrate to the injured region in response to chemotactic factors, and produce extracellular matrix proteins including collagen. In this study, we investigated the effects of rhubarb (Rheum palmatum L.) on transforming growth factor (TGF)-beta1-induced expressions of alpha-smooth-muscle actin (SMA) and collagen, and the migration of HSCs. METHODS HSC-T6, a cell line of rat HSCs, was used in the in vitro experiments. An enzyme-linked immunosorbent assay and Sircol red assay were used to detect the expressions of alpha-SMA and collagen, respectively. HSC-T6 migration was assayed with a transwell apparatus. Phosphorylations of Smad2/3 and mitogen-activated protein kinases (MAPKs), including extracellular signal-regulated kinase (ERK) 1/2, p38, and c-jun N-terminal kinase (JNK), were analyzed with Western blotting. Matrix metalloproteinase (MMP)-2 activity was examined by gelatin zymography. RESULTS The results revealed that a rhubarb extract concentration-dependently attenuated TGF-beta1-induced alpha-SMA and collagen expressions and migration of HSCs. The inhibitory effect of rhubarb was associated with (i) down-regulation of the phosphorylation of Smad2/3 and JNK, and (ii) attenuation of MMP-2 activity. Within the working concentrations used, the rhubarb extract did not affect cell viability of HSCs. CONCLUSION The results suggest that rhubarb attenuated TGF-beta1-mediated migration of HSCs possibly by interfering with Smad2/3 phosphorylation, the MAPK pathway, and MMP-2 activity.
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Affiliation(s)
- Yun-Lian Lin
- National Research Institute of Chinese Medicine, Taipei, Taiwan
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Sakunpak A, Sirikatitham A, Panichayupakaranant P. Preparation of anthraquinone high-yieldingSenna alataextract and its stability. PHARMACEUTICAL BIOLOGY 2009. [DOI: 10.1080/13880200802434757] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Shi P, Huang Z, Chen G. Rhein induces apoptosis and cell cycle arrest in human hepatocellular carcinoma BEL-7402 cells. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2008; 36:805-13. [PMID: 18711776 DOI: 10.1142/s0192415x08006259] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Rhein, an anthraquinone derivative of rhubarb, inhibits the proliferation of various human cancer cells. In this paper, we focused on studying the effects of rhein on human hepatocelluar carcinoma BEL-7402 cells and further understanding the underlying molecular mechanism in an effort to make the potential development of rhein in the treatment of cancers. Using MTT assay and flow cytometry, we demonstrate a critical role of rhein in the suppression of BEL-7402 cell proliferation in a concentration- and time-dependent manner. The increase of apoptosis rate was observed after incubation of BEL-7402 cells with rhein at 50-200 muM for 48 hours, and the cells exhibit typical apoptotic features including cellular morphological change and chromatin condensation. Moreover, rhein-induced cell cycle S-phase arrest. Additionally, after rhein treatment, expression levels of c-Myc gene were decreased, while those of caspase-3 gene were increased in a dose-dependent manner by using real-time PCR assay. The results demonstrate for the first time that cell cycle S-phase arrest is one of the mechanisms of rhein in inhibition of BEL-7402 cells. Rhein plays its role by inducing cell cycle arrest via downregulation of oncogene c-Myc and apoptosis through the caspase-dependent pathway. It is expected that rhein will be effective and useful as a new agent in hepatocelluar carcinoma treatment in the future.
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Affiliation(s)
- Ping Shi
- Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China.
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Chatsiriwej N, Wungsintaweekul J, Panichayupakaranant P. Anthraquinone Production in Senna alata. Root Cultures. PHARMACEUTICAL BIOLOGY 2008. [DOI: 10.1080/13880200600794154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Shao C, Wang C, Wei M, Li S, She Z, Gu Y, Lin Y. Structural and spectral assignments of six anthraquinone derivatives from the mangrove fungus (ZSUH-36). MAGNETIC RESONANCE IN CHEMISTRY : MRC 2008; 46:886-889. [PMID: 18615624 DOI: 10.1002/mrc.2266] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A new natural product named 6,8,1'-tri-O-methyl averantin (1) has been isolated together with five known anthraquinones 1'-O-methyl averantin (2), 6,8-di-O-methyl averufin (3) averufin (4), versicolorin C (5) and 6,8-di-O-methyl averufanin (6) from a mangrove endophytic fungus ZSUH-36 collected from the South China Sea. NMR techniques including COSY, HMQC, and HMBC were used to elucidate the structures of these compounds. We report the unambiguous assignments of the (1)H and (13)C NMR spectra of the new compound 6,8,1'-tri-O-methyl averantin(1).
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Affiliation(s)
- Changlun Shao
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, PR China
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Nourmohammadian F, Gholami MD. Solvent-Free Synthesis of Novel Highly Functionalized Dihydroanthra[1,2-b]furan-6,11-dione Derivatives. SYNTHETIC COMMUN 2008. [DOI: 10.1080/00397910802222621] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Sob SVT, Wabo HK, Tane P, Ngadjui BT, Ma D. A xanthone and a polyketide derivative from the leaves of Cassia obtusifolia (Leguminosae). Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.05.125] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Wang JX, Xiao XH, Li GK. Study of vacuum microwave-assisted extraction of polyphenolic compounds and pigment from Chinese herbs. J Chromatogr A 2008; 1198-1199:45-53. [DOI: 10.1016/j.chroma.2008.05.045] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2008] [Revised: 05/17/2008] [Accepted: 05/19/2008] [Indexed: 11/25/2022]
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Kang SC, Lee CM, Choung ES, Bak JP, Bae JJ, Yoo HS, Kwak JH, Zee OP. Anti-proliferative effects of estrogen receptor-modulating compounds isolated from Rheum palmatum. Arch Pharm Res 2008; 31:722-6. [PMID: 18563353 DOI: 10.1007/s12272-001-1218-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2007] [Revised: 10/05/2007] [Accepted: 11/05/2007] [Indexed: 11/25/2022]
Abstract
The Rheum palmatum L., a traditional medicine in Korea, was screened for their estrogenic activity in a recombinant yeast system with a human estrogen receptor (ER) expression plasmid and a reporter plasmid used in a previous study. The EC50 values of the n-hexane, dichloromethane, ethyl acetate, n-butanol, and water fractions of the methanolic extract of R. palmatum in the yeast-based estrogenicity assay system were 0.145, 0.093, 0.125, 1.459, 2.853 microg/mL, respectively, with marked estrogenic activity in the dichloromethane fraction. Using an activity-guided fractionation approach, five known anthraquinones, chrysophanol (1), physcion (2), emodin (3), aloe-emodin (4) and rhein (5), were isolated from the dichloromethane fraction. Compound 3 had the highest estrogenic relative potency (RP, 17bestradiol = 1.00) (6.3 x 10(-2)), followed by compound 4 (3.8 x 10(-3)), compound 5 (2.6 x 10(-4)), a compound 1 (2.1 x 10(-4)). Also, compound 3 and fraction 3 (which contained compound 3) of the dichloromethane fraction of R. palmatum showed strong cytotoxicity in both ER-positive (MCF-7) and-negative (MDA-MB-231) breast cancer cell lines.
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Affiliation(s)
- Se Chan Kang
- Gyeonggi Pharmaceutical Research Center, Suwon, 443-766, Korea
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Cui XR, Takahashi K, Shimamura T, Koyanagi J, Komada F, Saito S. Preparation of 1,8-di-O-alkylaloe-emodins and 15-amino-, 15-thiocyano-, and 15-selenocyanochrysophanol derivatives from aloe-emodin and studying their cytotoxic effects. Chem Pharm Bull (Tokyo) 2008; 56:497-503. [PMID: 18379097 DOI: 10.1248/cpb.56.497] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
1,8-di-O-alkylaloe-emodin derivatives (namely, methyl-, propyl-, hexyl-, dodecyl-, and octadecyl) were synthesized from naturally occurring aloe-emodin. Further, derivatives having various substituents such as diethylamino, pyrrolidinyl, piperidinyl, methylpiperazinyl, imidazolyl, thiocyano and selenocyano groups at the 15 position of chrysophanol and 1,8-di-O-hexylchrysophanol from aloe-emodin were synthesized. The cytotoxic effects of these derivatives on less P-glycoprotein (P-gp)-expressing HCT 116 cells and stably P-gp-expressing Hep G2 cells were evaluated by performing 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Among these products, several of them exhibited markedly higher potent cytotoxic effects not only on HCT116 cells but also Hep G2 cancer cells as compared to aloe-emodin.
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Affiliation(s)
- Xing-Ri Cui
- Faculty of Pharmaceutical Sciences, Josai University
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Synthesis and Evaluation of 2-[123I]iodoemodin for a Potential Breast Cancer Imaging Agent. B KOREAN CHEM SOC 2008. [DOI: 10.5012/bkcs.2008.29.3.595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Saracino MR, Lampe JW. Phytochemical regulation of UDP-glucuronosyltransferases: implications for cancer prevention. Nutr Cancer 2008; 59:121-41. [PMID: 18001207 DOI: 10.1080/01635580701458178] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Uridine 5'-diphospho-glucuronosyltransferases (UGTs) are Phase II biotransformation enzymes that metabolize endogenous and exogenous compounds, some of which have been associated with cancer risk. Many phytochemicals have been shown to induce UGTs in humans, rodents, and cell culture systems. Because UGTs maintain hormone balance and facilitate excretion of potentially carcinogenic compounds, regulation of their expression and activity may affect cancer risk. Phytochemicals regulate transcription factors such as the nuclear factor-erythroid 2-related factor 2 (Nrf2), aryl hydrocarbon, and pregnane X receptors as well as proteins in several signal transduction cascades that converge on Nrf2 to stimulate UGT expression. This induction can be modified by several factors, including phytochemical dose and bioavailability and interindividual variation in enzyme expression. In this review, we summarize the knowledge of dietary modulation of UGTs, particularly by phytochemicals, and discuss the potential mechanisms by which phytochemicals regulate UGT transcription.
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