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Goleij P, Tabari MAK, Rezaee A, Sanaye PM, Daglia M, Alijanzadeh D, Alsharif KF, Kumar AP, Khan H. Translating molecular insights into clinical success: alkaloid-based therapies for leukemia. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2025; 398:2547-2568. [PMID: 39476244 DOI: 10.1007/s00210-024-03540-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2024] [Accepted: 10/11/2024] [Indexed: 03/19/2025]
Abstract
Alkaloids, a diverse class of naturally occurring compounds, have shown significant potential in the treatment of leukemia by targeting key molecular pathways and cellular mechanisms. This review discusses several potent alkaloids, such as homoharringtonine, chaetominine, matrine, and jerantinine B, which induce apoptosis, cell cycle arrest, and autophagy and inhibit signaling pathways including PI3K/Akt/mTOR, MAPK, and NF-κB. For instance, homoharringtonine induces apoptosis in acute myeloid leukemia (AML) cells via the SP1/TET1/5hmC/FLT3/MYC axis, while chaetominine enhances chemosensitivity by inhibiting the PI3K/Akt/Nrf2 pathway. In addition, targeting leukemia stem cells (LSCs) with alkaloids such as zalypsis offers promise due to its ability to induce apoptosis without significantly affecting normal hematopoietic stem cells. The modulation of the immune response, such as the inhibition of NF-κB activation by noscapine, further underscores the potential of alkaloids in overcoming treatment resistance. Various studies have demonstrated the efficacy of alkaloids across different leukemia types. For example, jerantinine B targets AML cells, while vincristine has shown success in lymphocytic leukemia. Clinical trials have also highlighted the benefits of alkaloids, including homoharringtonine, which achieved a 79.9% complete remission rate in AML patients. However, adverse effects such as neutropenia and hepatotoxicity necessitate careful management. Collectively, these findings emphasize the need for further research into alkaloid-based combination therapies to enhance efficacy and minimize toxicity, providing a promising avenue for innovative leukemia treatments.
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Affiliation(s)
- Pouya Goleij
- USERN Office, Kermanshah University of Medical Sciences, Kermanshah, Iran.
- PhytoPharmacology Interest Group (PPIG), Network (USERN), Universal Scientific Education and Research, Tehran, Iran.
- Department of Genetics, Sana Institute of Higher Education, Sari, Iran.
| | - Mohammad Amin Khazeei Tabari
- PhytoPharmacology Interest Group (PPIG), Network (USERN), Universal Scientific Education and Research, Tehran, Iran
- Student Research Committee, School of Medicine, Mazandaran University of Medical Sciences, Sari, Mazandaran, Iran
| | - Aryan Rezaee
- Medical Doctor, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Pantea Majma Sanaye
- PhytoPharmacology Interest Group (PPIG), Network (USERN), Universal Scientific Education and Research, Tehran, Iran
- School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Maria Daglia
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131, Naples, Italy
- International Research Center for Food Nutrition and Safety, Jiangsu University, Zhenjiang, 212013, China
| | - Dorsa Alijanzadeh
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Khalaf F Alsharif
- Department of Clinical Laboratory Science, College of Applied Medical Science, Taif University, P.O. Box 11099, 21944, Taif, Saudi Arabia
| | - Alan Prem Kumar
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- NUS Center for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Haroon Khan
- Department of Pharmacy, Faculty of Chemical and Life Sciences, Abdul Wali Khan University Mardan, Mardan, 23200, Pakistan.
- Department of Pharmacy, Korea University, Sejong, 20019, South Korea.
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Nakano D, Ishitsuka K, Ishihara M, Tsuchihashi R, Okawa M, Tamura K, Kinjo J. Screening of Promising Chemotherapeutic Candidates from Plants against Human Adult T-Cell Leukemia/Lymphoma (VII): Active Principles from Thuja occidentalis L. Molecules 2021; 26:7619. [PMID: 34946696 PMCID: PMC8707666 DOI: 10.3390/molecules26247619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/08/2021] [Accepted: 12/13/2021] [Indexed: 11/16/2022] Open
Abstract
During the screening of novel chemotherapeutic candidates from plants against adult T-cell leukemia/lymphoma, we identified that the extracts of Thuja occidentalis (Cupressaceae) showed potent anti-proliferative activity in MT-1 and MT-2 cells. Therefore, we attempted to isolate the active components from this plant. We isolated and identified 32 compounds (1-32; eight lignans, 18 terpenoids, and six flavonoids) from the extracts of the leaves and cones. Their structures were determined by spectroscopic analysis. Several of the isolated compounds inhibited the growth of both cell lines. Lignans showed more potent activity than other classes of compounds. A comparison of the activities of compounds 1-8 revealed that the presence of a trans-lactone (linkage of C-6 to C-7) correlated with increased activity. Diterpenes showed moderate activity, and the presence of a ketone moiety at the C-7 position correlated with increased activity in compounds 12-21. In addition, biflavones showed moderate activity, and the presence of methoxy functions appeared to influence the activity of these compounds. Several lignans were lead compound of anti-cancer reagent (etoposide). In conclusion, not only lignans, but also diterpenes and/or biflavones, may be promising candidates for the treatment of adult T-cell leukemia/lymphoma.
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Affiliation(s)
- Daisuke Nakano
- Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka 814-0180, Japan; (D.N.); (M.I.); (R.T.); (J.K.)
| | - Kenji Ishitsuka
- Division of Hematology and Rheumatology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima 890-8544, Japan;
| | - Madoka Ishihara
- Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka 814-0180, Japan; (D.N.); (M.I.); (R.T.); (J.K.)
| | - Ryota Tsuchihashi
- Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka 814-0180, Japan; (D.N.); (M.I.); (R.T.); (J.K.)
| | - Masafumi Okawa
- Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka 814-0180, Japan; (D.N.); (M.I.); (R.T.); (J.K.)
| | - Kazuo Tamura
- Division of Medical Oncology, Hematology and Infectious Disease, Department of Internal Medicine, Fukuoka University, Fukuoka 814-0180, Japan;
| | - Junei Kinjo
- Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka 814-0180, Japan; (D.N.); (M.I.); (R.T.); (J.K.)
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Dos Santos DF, de Pilger DRB, Vandermeulen C, Khouri R, Mantoani SP, Nunes PSG, de Andrade P, Carvalho I, Casseb J, Twizere JC, Willems L, Freitas-Junior L, Kashima S. Non-cytotoxic 1,2,3-triazole tethered fused heterocyclic ring derivatives display Tax protein inhibition and impair HTLV-1 infected cells. Bioorg Med Chem 2020; 28:115746. [PMID: 33007558 DOI: 10.1016/j.bmc.2020.115746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/26/2020] [Accepted: 08/27/2020] [Indexed: 10/23/2022]
Abstract
Human T cell lymphotropic virus type 1 (HTLV-1) is a human retrovirus that infects approximately 10-20 million people worldwide and causes an aggressive neoplasia (adult T-cell leukemia/lymphoma - ATL). Therapeutic approaches for the treatment of ATL have variable effectiveness and poor prognosis, thus requiring strategies to identify novel compounds with activity on infected cells. In this sense, we initially screened a small series of 25 1,2,3-triazole derivatives to discover cell proliferation inhibitors and apoptosis inducers in HTLV-1-infected T-cell line (MT-2) for further assessment of their effect on viral tax activity through inducible-tax reporter cell line (Jurkat LTR-GFP). Eight promising compounds (02, 05, 06, 13, 15, 21, 22 and 25) with activity ≥70% were initially selected, based on a suitable cell-based assay using resazurin reduction method, and evaluated towards cell cycle, apoptosis and Tax/GFP expression analyses through flow cytometry. Compound 02 induced S phase cell cycle arrest and compounds 05, 06, 22 and 25 promoted apoptosis. Remarkably, compounds 22 and 25 also reduced GFP expression in an inducible-tax reporter cell, which suggests an effect on Tax viral protein. More importantly, compounds 02, 22 and 25 were not cytotoxic in human hepatoma cell line (Huh-7). Therefore, the discovery of 3 active and non-cytotoxic compounds against HTLV-1-infected cells can potentially contribute, as an initial promising strategy, to the development process of new drugs against ATL.
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Affiliation(s)
- Daiane Fernanda Dos Santos
- Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; Regional Blood Center of Ribeirão Preto, Ribeirão Preto, São Paulo, Brazil.
| | - Denise Regina Bairros de Pilger
- Federal University of São Paulo, São Paulo, São Paulo, Brazil; Department of Microbiology, Biomedical Sciences Institute, University of São Paulo, São Paulo, São Paulo, Brazil
| | | | - Ricardo Khouri
- Gonçalo Moniz Research Center (CPqGM), Oswaldo Cruz Foundation (FIOCRUZ), Salvador, Bahia, Brazil
| | | | | | - Peterson de Andrade
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Ivone Carvalho
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Jorge Casseb
- Institute of Tropical Medicine of São Paulo, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Jean-Claude Twizere
- Protein Signaling and Interactions (GIGA), University of Liège, Liège, Belgium
| | - Luc Willems
- Molecular and Cellular Epigenetics (GIGA), University of Liège, Liège, Belgium
| | - Lucio Freitas-Junior
- Department of Microbiology, Biomedical Sciences Institute, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Simone Kashima
- Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; Regional Blood Center of Ribeirão Preto, Ribeirão Preto, São Paulo, Brazil
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Zhang J, Morris-Natschke SL, Ma D, Shang XF, Yang CJ, Liu YQ, Lee KH. Biologically active indolizidine alkaloids. Med Res Rev 2020; 41:928-960. [PMID: 33128409 DOI: 10.1002/med.21747] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 10/09/2020] [Accepted: 10/19/2020] [Indexed: 12/23/2022]
Abstract
Indolizidine alkaloids are chemical constituents isolated from various marine and terrestrial plants and animals, including but not limited to trees, fungi, ants, and frogs, with a myriad of important biological activities. In this review, we discuss the biological activity and pharmacological effects of indolizidine alkaloids and offer new avenues toward the discovery of new and better drugs based on these naturally occurring compounds.
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Affiliation(s)
- Junmin Zhang
- School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Susan L Morris-Natschke
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Di Ma
- School of Pharmacy, Lanzhou University, Lanzhou, China
| | | | - Chen-Jie Yang
- School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Ying-Qian Liu
- School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Kuo-Hsiung Lee
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina, USA
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Jia XH, Zhao HX, Du CL, Tang WZ, Wang XJ. Possible pharmaceutical applications can be developed from naturally occurring phenanthroindolizidine and phenanthroquinolizidine alkaloids. PHYTOCHEMISTRY REVIEWS : PROCEEDINGS OF THE PHYTOCHEMICAL SOCIETY OF EUROPE 2020; 20:845-868. [PMID: 32994757 PMCID: PMC7517060 DOI: 10.1007/s11101-020-09723-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 09/14/2020] [Indexed: 06/11/2023]
Abstract
Naturally occurring phenanthroindolizidine and phenanthroquinolizidine alkaloids (PIAs and PQAs) are two small groups of herbal metabolites sharing a similar pentacyclic structure with a highly oxygenated phenanthrene moiety fused with a saturated or an unsaturated N-heterocycle (indolizidine/quinolizidine moieties). Natural PIAs and PQAs only could be obtained from finite plant families (such as Asclepiadaceae, Lauraceae and Urticaceae families, etc.). Up to date, more than one hundred natural PIAs, while only nine natural PQAs had been described. PIA and PQA analogues have been applied to the development of potent anticancer agents all along because of their excellent cytotoxic activity. However, in the last two decades, other great biological properties, such as anti-inflammatory and antiviral activities were revealed successively by different pharmacological assays. Especially because of their potent antiviral activity against coronavirus (TGEV, SARS CoV and MHV) and tobacco mosaic virus, PIA and PQA analogues have attracted much pharmaceutical attention again, some of them have been used to present interesting targets for total or semi synthesis, and structure-activity relationship (SAR) study for the development of antiviral agents. In this review, natural PIA and PQA analogues obtained in the last two decades with their herbal origins, key spectroscopic characteristics for structural identification, biological activity with possible SARs and application prospects were systematically summarized. We hope this paper can stimulate further investigations on PIA and PQA analogues as an important source for potential drug discovery.
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Affiliation(s)
- Xian-hui Jia
- Institute of Materia Medica, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, 250062 People’s Republic of China
| | - Huan-xin Zhao
- Institute of Materia Medica, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, 250062 People’s Republic of China
| | - Cheng-lin Du
- Institute of Materia Medica, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, 250062 People’s Republic of China
| | - Wen-zhao Tang
- Institute of Materia Medica, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, 250062 People’s Republic of China
| | - Xiao-jing Wang
- Institute of Materia Medica, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, 250062 People’s Republic of China
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Review of Natural Compounds for the Management and Prevention of Lymphoma. Processes (Basel) 2020. [DOI: 10.3390/pr8091164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Lymphoma is a type of blood cancer that can be categorized into two types-Hodgkin lymphoma (HL) and Non-Hodgkin lymphoma (NHL). A total of 509,590 and 79,990 cases of NHL and HL were newly diagnosed in 2018, respectively. Although conventional therapy has stridden forward over recent decades, its adverse effects are still a hurdle to be solved. Thus, to help researchers develop better lymphoma treatment, this study aims to review the systematic anticancer data for natural products and their compounds. A variety of natural products showed anticancerous effects on lymphoma by regulation of intracellular mechanisms including apoptosis as well as cell cycle arrest. As these results shed light on the potential to substitute conventional therapy with natural products, it may become a promising strategy for lymphoma treatment in the near future.
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Zhang S, Liu Y, Xing F, Che CM. Direct preparation of unprotected aminimides (R 3N +-NH -) from natural aliphatic tertiary alkaloids (R 3N) by [Mn(TDCPP)Cl]-catalysed N-amination reaction. Chem Commun (Camb) 2020; 56:9102-9105. [PMID: 32644058 DOI: 10.1039/d0cc02934c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A panel of natural aliphatic tertiary alkaloids (R3N) were directly converted to R3N+-NH- (without the need to prepare protected aminimides R3N+-NR'- followed by deprotection) by [Mn(TDCPP)Cl]-catalysed N-amination reaction, with O-(2,4-dinitrophenyl)hydroxylamine as the nitrogen source, in up to 98% yields under mild reaction conditions.
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Affiliation(s)
- Shilong Zhang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, P. R. China.
| | - Yungen Liu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, P. R. China.
| | - Fangrong Xing
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Hong Kong, P. R. China
| | - Chi-Ming Che
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, P. R. China. and Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Hong Kong, P. R. China and HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong 518057, P. R. China
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Futsch N, Mahieux R, Dutartre H. HTLV-1, the Other Pathogenic Yet Neglected Human Retrovirus: From Transmission to Therapeutic Treatment. Viruses 2017; 10:v10010001. [PMID: 29267225 PMCID: PMC5795414 DOI: 10.3390/v10010001] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 12/16/2017] [Accepted: 12/18/2017] [Indexed: 12/12/2022] Open
Abstract
Going back to their discovery in the early 1980s, both the Human T-cell Leukemia virus type-1 (HTLV-1) and the Human Immunodeficiency Virus type-1 (HIV-1) greatly fascinated the virology scene, not only because they were the first human retroviruses discovered, but also because they were associated with fatal diseases in the human population. In almost four decades of scientific research, both viruses have had different fates, HTLV-1 being often upstaged by HIV-1. However, although being very close in terms of genome organization, cellular tropism, and viral replication, HIV-1 and HTLV-1 are not completely commutable in terms of treatment, especially because of the opposite fate of the cells they infect: death versus immortalization, respectively. Nowadays, the antiretroviral therapies developed to treat HIV-1 infected individuals and to limit HIV-1 spread among the human population have a poor or no effect on HTLV-1 infected individuals, and thus, do not prevent the development of HTLV-1-associated diseases, which still lack highly efficient treatments. The present review mainly focuses on the course of HTLV-1 infection, from the initial infection of the host to diseases development and associated treatments, but also investigates HIV-1/HTLV-1 co-infection events and their impact on diseases development.
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Affiliation(s)
- Nicolas Futsch
- International Center for Research in Infectiology, Retroviral Oncogenesis Laboratory, INSERM U1111-Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Université Lyon, F-69007 Lyon, France.
- Equipe labellisée "Ligue Nationale Contre le Cancer", France.
| | - Renaud Mahieux
- International Center for Research in Infectiology, Retroviral Oncogenesis Laboratory, INSERM U1111-Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Université Lyon, F-69007 Lyon, France.
- Equipe labellisée "Ligue Nationale Contre le Cancer", France.
| | - Hélène Dutartre
- International Center for Research in Infectiology, Retroviral Oncogenesis Laboratory, INSERM U1111-Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Université Lyon, F-69007 Lyon, France.
- Equipe labellisée "Ligue Nationale Contre le Cancer", France.
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Screening of promising chemotherapeutic candidates from plants against human adult T-cell leukemia/lymphoma (V): coumarins and alkaloids from Boenninghausenia japonica and Ruta graveolens. J Nat Med 2016; 71:170-180. [PMID: 27738859 DOI: 10.1007/s11418-016-1046-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 09/18/2016] [Indexed: 10/20/2022]
Abstract
During the course of our studies towards the identification of promising chemotherapeutic candidates from plants against two human T-cell lymphotropic virus type I-infected T-cell lines (MT-1 and MT-2), we screened 17 extracts from 9 rutaceous plants against MT-1 and MT-2 cells. The extracts from the aerial parts and roots of Boenninghausenia japonica, as well as the leaves and roots of Ruta graveolens showed potent antiproliferative effects. After activity-guided fractionation, we isolated 44 compounds from two rutaceous plants, including three new compounds (1-3), which were classified into 26 coumarin analogs (13 coumarins, 8 furanocoumarins, 4 dihydrofuranocoumarins and one dihydropyranocoumarin), 15 alkaloid analogs (7 quinolone alkaloids, 4 acridone alkaloids, 3 furanoquinoline alkaloids and one tetrahydroacridone alkaloid) and 3 flavonoid glycosides. Structure-activity relationship studies were also evaluated. The coumarin compounds (2, 3 and 7-9) bearing a 3-dimethylallyl moiety showed potent activity. Similarly, of all the furanocoumarins evaluated in the current study, compound 17 bearing a 3-dimethylallyl group also showed potent activity. A dihydrofuranocoumarin (27) bearing a 3-dimethylallyl moiety showed the most potent activity. Following 27, compound 28 showed potent activity. These results therefore suggested that the presence of a 3-dimethylallyl moiety was important to the antiproliferative activity of these coumarin analogs.
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Kinjo J, Nakano D, Fujioka T, Okabe H. Screening of promising chemotherapeutic candidates from plants extracts. J Nat Med 2016; 70:335-60. [PMID: 27086008 PMCID: PMC4935755 DOI: 10.1007/s11418-016-0992-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 03/25/2016] [Indexed: 11/29/2022]
Abstract
Over the course of our studies investigating anti-proliferative properties of compounds originating from plants against human gastric adenocarcinoma (MK-1), human uterine carcinoma (HeLa), murine melanoma (B16F10), and two human T cell lymphotropic virus type 1 (HTLV-1)-infected T-cell lines (MT-1 and MT-2), we have screened 582 extracted samples obtained from a variety of parts from 370 plants. A few extracts showed anti-proliferative activity against all cell lines, but upon further investigation, toxicity toward selected cell lines was recognized. After activity-guided fractionation, isolation of the active principles was achieved. Structure–activity relationship studies identified the components and functionalities responsible for the specific selectivity against each cancer cell line. The effect of polyacetylenes against MK-1 cells was more potent than against HeLa and B16F10 cells. The compound having a 3,4-dihydroxyphenethyl group also showed an anti-proliferative effect against B16F10 cells. Some 6-methoxyflavone derivatives and 8-hydroxy furanocoumarins were good inhibitors of HeLa cell growth. The 17 compounds whose EC50 values were less than 1 nM did not show specific cellular selectivity. Because the cytotoxic effect of 24, 25-dihydrowithanolide D toward control cells was observed at a concentration about 100 times higher than those for the cancer cell lines, withanolide was identified as the most promising chemotherapeutic candidate in our experiments.
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Affiliation(s)
- Junei Kinjo
- Faculty of Pharmaceutical Sciences, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan.
| | - Daisuke Nakano
- Faculty of Pharmaceutical Sciences, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan
| | - Toshihiro Fujioka
- Faculty of Pharmaceutical Sciences, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan
| | - Hikaru Okabe
- Faculty of Pharmaceutical Sciences, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan
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