1
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Ye YS, Duan YT, Zhou Z, Thepkaysone K, Douangdeuane B, Xu G. Structurally Diverse Cytotoxic Polyphenols from Garcinia gracilis. JOURNAL OF NATURAL PRODUCTS 2023; 86:2206-2215. [PMID: 37650785 DOI: 10.1021/acs.jnatprod.3c00498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Thirty-five diverse polyphenols, belonging to seven structure classes, were isolated from Garcinia gracilis, a medicinal and edible plant sampled from Laos. The structures of nine new compounds, gargarcilones A-I (1-3, 5-7, 10, 12, and 17), were established using spectroscopic, X-ray diffraction, and experimental and calculated ECD methods. Additionally, we revised the stereochemical assignment of cochinchinoxanthone and cochinchinoxanthone C. The compounds were evaluated for antiproliferative activity against five human tumor cell lines (HL-60, A549, SMMC-7721, MDA-MB-231, and SW480). Compounds 1-4, 7, and 8 exhibited cytotoxic activity with IC50 values of 0.5-8.9 μM. Compound 3 significantly induced apoptosis in SMMC-7721 cells.
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Affiliation(s)
- Yan-Song Ye
- State Key Laboratory of Phytochemistry and Plant Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - Yao-Tao Duan
- State Key Laboratory of Phytochemistry and Plant Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - Zhuo Zhou
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China
| | - Khamphanh Thepkaysone
- Institute of Traditional Medicine, Ministry of Health, Phonepapao Village, Sisattanack District, 856 Vientiane, Lao People's Democratic Republic
| | - Bounleuane Douangdeuane
- Institute of Traditional Medicine, Ministry of Health, Phonepapao Village, Sisattanack District, 856 Vientiane, Lao People's Democratic Republic
| | - Gang Xu
- State Key Laboratory of Phytochemistry and Plant Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China
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2
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Kaennakam S, Sukandar ER, Rassamee K, Siripong P. Cytotoxic Polyprenylated Benzoylphloroglucinol Derivatives from the Branches of Garcinia schomburgkiana. PLANTA MEDICA 2023; 89:508-515. [PMID: 35500601 DOI: 10.1055/a-1841-0745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Five undescribed polyprenylated benzoylphloroglucinol derivatives (1: - 5: ), named garschomcinols A - E, and five known analogues (6: - 10: ) were isolated from the branches of Garcinia schomburgkiana. Their structures were determined on the basis of 1D and 2D NMR and HRESIMS analyses. The absolute configuration of the bicyclo [3.3.1]nonane core structure of the polyprenylated benzoylphloroglucinols was assigned by comparison of its experimental electronic circular dichroism data with that of related compounds. All isolated compounds were evaluated for their cytotoxicity in vitro against five cancer cell lines. Compound 6: showed potent cytotoxicity against five cancer cell lines including KB, HeLa S3, HT-29, MCF-7, and Hep G2 with IC50 values in the range of 5.05 - 7.03 µM.
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Affiliation(s)
- Sutin Kaennakam
- Department of Agro-Industrial, Food, and Environmental Technology, Faculty of Applied Science, King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, Thailand
| | - Edwin Risky Sukandar
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Kitiya Rassamee
- Natural Products Research Section, Research Division, National Cancer Institute, Bangkok, Thailand
| | - Pongpun Siripong
- Natural Products Research Section, Research Division, National Cancer Institute, Bangkok, Thailand
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3
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Wu Z, Dai X, Wang W, Zhang X, Chen J, Liu J, Huang L, Li Y, Zhang S, Wang G, Zhang Y. Polyprenylated Benzophenones and Tocotrienol Derivatives from the Edible Fruits of Garcinia oblongifolia Champ. ex Benth. and Their Cytotoxicity Activity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:10506-10520. [PMID: 35997267 DOI: 10.1021/acs.jafc.2c04216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The fruits of Garcinia oblongifolia Champ. ex Benth. were famous as an edible fruit in tropical regions of China. Because of its unique taste and great nutritional value, the ripe fresh fruits of G. oblongifolia could be eaten directly or used as raw materials for natural beverages and food supplements. In this work, six new polyprenylated benzophenones (1-6) and one new dimeric tocotrienol derivative (7), together with 18 known ones (8-25), were isolated from the fruits of G. oblongifolia. Compounds 1-4 were peculiar polycyclic polyprenylated acylphloroglucinols (PPAPs) featuring the rare carbon skeleton of a bicyclo[3.4.1]decane-1,3-diketone. Moreover, all isolates (1-25) were evaluated for their cytotoxicity activities against nasopharyngeal carcinoma (NPC) cell lines (CNE1 and CNE2). Among these isolates, compound 6 exhibited the strongest cytotoxicity activity on CNE1 and CNE2 cells with the IC50 values of 7.8 ± 0.2 and 9.1 ± 0.3 μM, respectively. Further mechanistic investigation demonstrated that 6 could induce mitophagy to promote Caspase-9/GSDME-mediated pyroptosis through triggering ROS in NPC cells.
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Affiliation(s)
- Zhongnan Wu
- Department of Radiology, The First Affiliated Hospital, Jinan University, Guangzhou510632, P. R. China
| | - Xiaoyong Dai
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Shenzhen Key Laboratory of Gene and Antibody Therapy, Institute of Biopharmaceutical and Health Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong518055, China
| | - Wenzhi Wang
- Institute of Traditional Chinese Medicine & Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou510632, P. R. China
| | - Xianfang Zhang
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology, College of Life Science and Technology, Jinan University, Guangzhou510632, P. R. China
| | - Jiawei Chen
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Shenzhen Key Laboratory of Gene and Antibody Therapy, Institute of Biopharmaceutical and Health Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong518055, China
| | - Jing Liu
- Department of Radiology, The First Affiliated Hospital, Jinan University, Guangzhou510632, P. R. China
| | - Laiqiang Huang
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Shenzhen Key Laboratory of Gene and Antibody Therapy, Institute of Biopharmaceutical and Health Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong518055, China
| | - Yaolan Li
- Institute of Traditional Chinese Medicine & Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou510632, P. R. China
| | - Shuixing Zhang
- Department of Radiology, The First Affiliated Hospital, Jinan University, Guangzhou510632, P. R. China
| | - Guocai Wang
- Institute of Traditional Chinese Medicine & Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou510632, P. R. China
- The Guangzhou Key Laboratory of Basic and Translational Research on Chronic Diseases, The First Affiliated Hospital, Jinan University, Guangzhou510632, China
| | - Yubo Zhang
- Institute of Traditional Chinese Medicine & Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou510632, P. R. China
- The Guangzhou Key Laboratory of Basic and Translational Research on Chronic Diseases, The First Affiliated Hospital, Jinan University, Guangzhou510632, China
- Guangdong Clinical Translational Center for Targeted Drug, Department of Pharmacology, School of Medicine, Jinan University, Guangzhou510632, P. R. China
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Bui DN, Nguyen LTT, Nguyen LTT, Ngo NTN, Tran PT, Nguyen HT, Dang LTN, Nguyen LHD, Trinh BTD. Two new antidiabetic xanthones from the twigs of Garcinia oblongifolia. Nat Prod Res 2022:1-10. [PMID: 35337215 DOI: 10.1080/14786419.2022.2055016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Two new xanthones, oblongixanthones I (1) and J (2), and seven known compounds (3-9), were isolated from an EtOAc extract of the twigs of Garcinia oblongifolia. Their structures were elucidated using spectroscopic methods, mainly 1 D and 2 D NMR. The antidiabetic effects of the two new compounds were evaluated using α-glucosidase and PTP1B inhibition assays. Both compounds displayed strong inhibition towards α-glucosidase with IC50 values of 258.7 ± 49.3 and 187.1 ± 27.5 μM, respectively (compared with acarbose, IC50 = 900.0 ± 3.0 μM) and moderate effects against PTP1B with IC50 values of 93.9 ± 12.3 and 64.1 ± 5.8 μM, respectively (compared with RK682, IC50 = 4.4 ± 0.3 l μM).
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Affiliation(s)
- Dzung N Bui
- Faculty of Chemistry, VNUHCM-University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Ly T T Nguyen
- Faculty of Chemistry, VNUHCM-University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Le-Thu T Nguyen
- Faculty of Chemistry, VNUHCM-University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Ngoc T N Ngo
- Faculty of Chemistry, VNUHCM-University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Phuong T Tran
- Faculty of Chemistry, VNUHCM-University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Hieu T Nguyen
- Faculty of Chemistry, VNUHCM-University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Linh T N Dang
- Faculty of Chemistry, VNUHCM-University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Lien-Hoa D Nguyen
- Faculty of Chemistry, VNUHCM-University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Binh T D Trinh
- Faculty of Chemistry, VNUHCM-University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
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5
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Bailly C, Vergoten G. Anticancer Properties and Mechanism of Action of Oblongifolin C, Guttiferone K and Related Polyprenylated Acylphloroglucinols. NATURAL PRODUCTS AND BIOPROSPECTING 2021; 11:629-641. [PMID: 34586597 PMCID: PMC8479269 DOI: 10.1007/s13659-021-00320-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 09/21/2021] [Indexed: 05/06/2023]
Abstract
Polyprenylated acylphloroglucinols represent an important class of natural products found in many plants. Among them, the two related products oblongifolin C (Ob-C) and guttiferone K (Gt-K) isolated from Garcinia species (notably from edible fruits), have attracted attention due to their marked anticancer properties. The two compounds only differ by the nature of the C-6 side chain, prenyl (Gt-K) or geranyl (Ob-C) on the phloroglucinol core. Their origin, method of extraction and biological properties are presented here, with a focus on the targets and pathways implicated in their anticancer activities. Both compounds markedly reduce cancer cell proliferation in vitro, as well as tumor growth and metastasis in vivo. They are both potent inducer of tumor cell apoptosis, and regulation of autophagy flux is a hallmark of their mode of action. The distinct mechanism leading to autophagosome accumulation in cells and the implicated molecular targets are discussed. The specific role of the chaperone protein HSPA8, known to interact with Ob-C, is addressed. Molecular models of Gt-K and Ob-C bound to HSPA8 provide a structural basis to their common HSPA8-binding recognition capacity. The review shed light on the mechanism of action of these compounds, to encourage their studies and potential development.
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Affiliation(s)
- Christian Bailly
- Scientific Consulting Office, OncoWitan, 59290, Lille, Wasquehal, France.
| | - Gérard Vergoten
- Inserm, INFINITE - U1286, Faculté de Pharmacie, University of Lille, Institut de Chimie Pharmaceutique Albert Lespagnol (ICPAL), 3 rue du Professeur Laguesse, BP-83, 59006, Lille, France
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6
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Ferraz CG, Ribeiro PR, Mendonça R, Silveira ER, Cruz FG. Novel polyprenylated benzophenone derivatives from Clusia burle-marxii. Fitoterapia 2020; 149:104760. [PMID: 33075410 DOI: 10.1016/j.fitote.2020.104760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 10/07/2020] [Accepted: 10/12/2020] [Indexed: 01/12/2023]
Abstract
Three new caged polyprenylated benzophenone derivatives named burlemarxiones D-F (1-3) were isolated from the hexane extract of Clusia burle-marxii trunks. Burlemarxione D (1) contains the tetracyclo[8.3.1.03,11.05,10]tetradecane core skeleton also observed for burlemarxione A, its probable immediate precursor. However, two additional rings are formed to produce an unprecedented complex-caged core skeleton. These additional rings could be formed by a radical cyclization reaction of one prenyl group at C-5 with C-1 and C-33, followed by oxidative dehydrogenation (rearomatization) or by an intramolecular [4 + 2] radical cycloaddition (Diels-Alder reaction), followed by an enolization reaction (rearomatization). Burlemarxiones E and F were isolated after methylation with diazomethane that was necessary to avoid the interconversion of the pair of β-diketones in tautomeric equilibrium. The proposed biosynthetic pathway for burlemarxiones D-F involves the condensation of either lavandulyl pyrophosphate or 2-(1-methylvinyl)-hexa-5-enyl pyrophosphate with the acylphloroglucinol derivative 6-benzoyl-5-hydroxy-5-cyclohexen-1,3-dione, followed by consecutive prenylation reactions. Therefore, Clusia burle-marxii reinforces the claim that the genus Clusia is an important source of sophisticated caged polyprenylated benzophenone derivatives.
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Affiliation(s)
- Caline G Ferraz
- Grupo de Estudos de Substâncias Naturais Orgânicas, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo s/n, 40170-115 Salvador, Brazil; Metabolomics Research Group, Departamento de Química Orgânica, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo s/n, 40170-115 Salvador, Brazil.
| | - Paulo R Ribeiro
- Grupo de Estudos de Substâncias Naturais Orgânicas, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo s/n, 40170-115 Salvador, Brazil; Metabolomics Research Group, Departamento de Química Orgânica, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo s/n, 40170-115 Salvador, Brazil
| | - Renata Mendonça
- Instituto de Química, Universidade Federal do Rio Grande do Norte, CP 1524, 59072-970 Natal, RN, Brazil
| | - Edilberto R Silveira
- Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, 60021-940 Fortaleza, CE, Brazil
| | - Frederico G Cruz
- Grupo de Estudos de Substâncias Naturais Orgânicas, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo s/n, 40170-115 Salvador, Brazil
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7
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Bicyclic polyprenylated acylphloroglucinols and their derivatives: structural modification, structure-activity relationship, biological activity and mechanism of action. Eur J Med Chem 2020; 205:112646. [PMID: 32791400 DOI: 10.1016/j.ejmech.2020.112646] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/02/2020] [Accepted: 07/04/2020] [Indexed: 12/22/2022]
Abstract
Bicyclic polyprenylated acylphloroglucinols (BPAPs), the principal bioactive benzophenone products isolated from plants of genera Garcinia and Hypericum, have attracted noticeable attention from the synthetic and biological communities due to their fascinating chemical structures and promising biological activities. However, the potential drug interaction, undesired physiochemical properties and toxicity have limited their potential use and development. In the last decade, pharmaceutical research on the structural modifications, structure-activity relationships (SARs) and mechanisms of action of BPAPs has been greatly developed to overcome the challenges. A comprehensive review of these scientific literature is extremely needed to give an overview of the rapidly emerging area and facilitate research related to BPAPs. This review, containing over 226 references, covers the progress made in the chemical synthesis-based structure modifications, SARs and the mechanism of action of BPAPs in vivo and vitro. The most relevant articles will focus on the discovery of lead compounds via synthetic modifications and the important BPAPs for which the direct targets have been deciphered. From this review, several key points of the SARs and mode of actions of this novel class of compounds have been summarized. The perspective and future direction of the research on BPAPs are concluded. This review would be helpful to get a better grasp of medicinal research of BPAPs and become a compelling guide for chemists dedicated to the synthesis of these compounds.
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Zhang G, Tan H, Chen W, Shen HC, Lu Y, Zheng C, Xu H. Synthesis of NH-Sulfoximines by Using Recyclable Hypervalent Iodine(III) Reagents under Aqueous Micellar Conditions. CHEMSUSCHEM 2020; 13:922-928. [PMID: 31950602 DOI: 10.1002/cssc.201903430] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/17/2020] [Indexed: 05/28/2023]
Abstract
The synthesis of NH-sulfoximines from sulfides has been first developed under mild conditions in an aqueous solution with surfactant TPGS-750-M as the catalyst at room temperature. In this newly developed process, a simple and convenient recycling strategy to regenerate the indispensable hypervalent iodine(III) is used. The resulting 1,2,3-trifluoro-5-iodobezene can be recovered almost quantitively from the mixture by liquid-liquid extraction and then oxidized to give the corresponding iodine(III) species. This optimized procedure is compatible with a broad range of functional groups and can be easily performed on a gram scale, providing a green protocol for the synthesis of sulfoximines.
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Affiliation(s)
- Guocai Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P. R. China
- Roche Innovation Center Shanghai, Roche Pharma Research and Early Development, 720 Cai Lun Road, Shanghai, 201203, P. R. China
| | - Hongsheng Tan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P. R. China
| | - Weichun Chen
- Roche Innovation Center Shanghai, Roche Pharma Research and Early Development, 720 Cai Lun Road, Shanghai, 201203, P. R. China
| | - Hong C Shen
- Roche Innovation Center Shanghai, Roche Pharma Research and Early Development, 720 Cai Lun Road, Shanghai, 201203, P. R. China
| | - Yue Lu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P. R. China
| | - Changwu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P. R. China
| | - Hongxi Xu
- Shuguang Hospital affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P. R. China
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9
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Khan T, Ali M, Khan A, Nisar P, Jan SA, Afridi S, Shinwari ZK. Anticancer Plants: A Review of the Active Phytochemicals, Applications in Animal Models, and Regulatory Aspects. Biomolecules 2019; 10:E47. [PMID: 31892257 PMCID: PMC7022400 DOI: 10.3390/biom10010047] [Citation(s) in RCA: 132] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/24/2019] [Accepted: 12/25/2019] [Indexed: 12/24/2022] Open
Abstract
The rising burden of cancer worldwide calls for an alternative treatment solution. Herbal medicine provides a very feasible alternative to western medicine against cancer. This article reviews the selected plant species with active phytochemicals, the animal models used for these studies, and their regulatory aspects. This study is based on a meticulous literature review conducted through the search of relevant keywords in databases, Web of Science, Scopus, PubMed, and Google Scholar. Twenty plants were selected based on defined selection criteria for their potent anticancer compounds. The detailed analysis of the research studies revealed that plants play an indispensable role in fighting different cancers such as breast, stomach, oral, colon, lung, hepatic, cervical, and blood cancer cell lines. The in vitro studies showed cancer cell inhibition through DNA damage and activation of apoptosis-inducing enzymes by the secondary metabolites in the plant extracts. Studies that reported in vivo activities of these plants showed remarkable results in the inhibition of cancer in animal models. Further studies should be performed on exploring more plants, their active compounds, and the mechanism of anticancer actions for use as standard herbal medicine.
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Affiliation(s)
- Tariq Khan
- Department of Biotechnology, University of Malakand, Chakdara 18800, Pakistan
| | - Muhammad Ali
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan; (P.N.); (S.A.); (Z.K.S.)
| | - Ajmal Khan
- Department of Zoology, University of Buner, Sowari 17290, Pakistan;
| | - Parveen Nisar
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan; (P.N.); (S.A.); (Z.K.S.)
| | - Sohail Ahmad Jan
- Department of Biotechnology, Hazara University, Mansehra 21120, Pakistan;
| | - Shakeeb Afridi
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan; (P.N.); (S.A.); (Z.K.S.)
| | - Zabta Khan Shinwari
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan; (P.N.); (S.A.); (Z.K.S.)
- National Council for Tibb, Islamabad, Pakistan
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10
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Liu YY, Ao Z, Xu QQ, Zhu DR, Chen C, Wang XB, Luo JG, Kong LY. Hyperpatulols A–I, spirocyclic acylphloroglucinol derivatives with anti-migration activities from the flowers of Hypericum patulum. Bioorg Chem 2019; 87:409-416. [DOI: 10.1016/j.bioorg.2019.03.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 03/06/2019] [Accepted: 03/13/2019] [Indexed: 11/24/2022]
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11
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Fu A, Peh YM, Ngan W, Wei N, Luo KQ. Rapid identification of antimicrometastases drugs using integrated model systems with two dimensional monolayer, three dimensional spheroids, and zebrafish xenotransplantation tumors. Biotechnol Bioeng 2018; 115:2828-2843. [DOI: 10.1002/bit.26816] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 07/10/2018] [Accepted: 08/09/2018] [Indexed: 01/28/2023]
Affiliation(s)
- Afu Fu
- School of Chemical and Biomedical Engineering, Nanyang Technological UniversitySingapore Singapore
| | - Yu Ming Peh
- School of Chemical and Biomedical Engineering, Nanyang Technological UniversitySingapore Singapore
| | - Weida Ngan
- School of Chemical and Biomedical Engineering, Nanyang Technological UniversitySingapore Singapore
| | - Na Wei
- School of Chemical and Biomedical Engineering, Nanyang Technological UniversitySingapore Singapore
| | - Kathy Qian Luo
- Faculty of Health Sciences, University of Macau, TaipaMacau China
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Shen K, Xi Z, Xie J, Wang H, Xie C, Lee CS, Fahey P, Dong Q, Xu H. Guttiferone K suppresses cell motility and metastasis of hepatocellular carcinoma by restoring aberrantly reduced profilin 1. Oncotarget 2018; 7:56650-56663. [PMID: 27494863 PMCID: PMC5302942 DOI: 10.18632/oncotarget.10992] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 07/18/2016] [Indexed: 12/27/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is an aggressive malignancy and the 5-year survival rate of advanced HCC is < 10%. Guttiferone K (GUTK) isolated from the Garcinia genus inhibited HCC cells migration and invasion in vitro and metastasis in vivo without apparent toxicity. Proteomic analysis revealed that actin-binding protein profilin 1 (PFN1) was markedly increased in the presence of GUTK. Over-expression of PFN1 mimicked the effect of GUTK on HCC cell motility and metastasis. The effect of GUTK on cell motility was diminished when PFN1 was over-expressed or silenced. Over-expression of PFN1 or incubation with GUTK decreased F-actin levels and the expression of proteins involved in actin nucleation, branching and polymerization. Moreover, a reduction of PFN1 protein levels was common in advanced human HCC and associated with poor survival rate. In conclusion, GUTK effectively suppresses the motility and metastasis of HCC cells mainly by restoration of aberrantly reduced PFN1 protein expression.
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Affiliation(s)
- Kaikai Shen
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zhichao Xi
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jianling Xie
- Nutrition and Metabolism, South Australian Health and Medical Research Institute, Adelaide, Australia
| | - Hua Wang
- Stanley Ho Center for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong, China
| | - Chanlu Xie
- School of Science and Health, The University of Western Sydney, Sydney, Australia
| | - C Soon Lee
- School of Science and Health, The University of Western Sydney, Sydney, Australia.,Central Clinical School and Bosch Institute, The University of Sydney, Sydney, Australia
| | - Paul Fahey
- School of Science and Health, The University of Western Sydney, Sydney, Australia
| | - Qihan Dong
- School of Science and Health, The University of Western Sydney, Sydney, Australia.,Central Clinical School and Bosch Institute, The University of Sydney, Sydney, Australia.,Department of Endocrinology, Royal Prince Alfred Hospital, Sydney, Australia
| | - Hongxi Xu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Institute of Arthritis Research, Shanghai Academy of Chinese Medical Sciences, Guanghua Integrative Medicine Hospital/ Shanghai University of T.C.M, Shanghai, China.,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, China
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13
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Yang XW, Grossman RB, Xu G. Research Progress of Polycyclic Polyprenylated Acylphloroglucinols. Chem Rev 2018; 118:3508-3558. [PMID: 29461053 DOI: 10.1021/acs.chemrev.7b00551] [Citation(s) in RCA: 249] [Impact Index Per Article: 41.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Polycyclic polyprenylated acylphloroglucinols (PPAPs) are a class of hybrid natural products sharing the mevalonate/methylerythritol phosphate and polyketide biosynthetic pathways and showing considerable structure and bioactivity diversity. This review discusses the progress of research into the chemistry and biological activity of 421 natural PPAPs in the past 11 years as well as in-depth studies of biological activities and total synthesis of some PPAPs isolated before 2006. We created an online database of all PPAPs known to date at http://www.chem.uky.edu/research/grossman/PPAPs . Two subclasses of biosynthetically related metabolites, spirocyclic PPAPs with octahydrospiro[cyclohexan-1,5'-indene]-2,4,6-trione core and complicated PPAPs produced by intramolecular [4 + 2] cycloadditions of MPAPs, are brought into the PPAP family. Some PPAPs' relative or absolute configurations are reassigned or critically discussed, and the confusing trivial names in PPAPs investigations are clarified. Pharmacologic studies have revealed a new molecular mechanism whereby hyperforin and its derivatives regulate neurotransmitter levels by activating TRPC6 as well as the antitumor mechanism of garcinol and its analogues. The antineoplastic potential of some type B PPAPs such as oblongifolin C and guttiferone K has increased significantly. As a result of the recent appearances of innovative synthetic methods and strategies, the total syntheses of 22 natural PPAPs including hyperforin, garcinol, and plukenetione A have been accomplished.
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Affiliation(s)
- Xing-Wei Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences, and Yunnan Key Laboratory of Natural Medicinal Chemistry , Kunming 650201 , People's Republic of China
| | - Robert B Grossman
- Department of Chemistry , University of Kentucky , Lexington , Kentucky 40506-0055 , United States
| | - Gang Xu
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences, and Yunnan Key Laboratory of Natural Medicinal Chemistry , Kunming 650201 , People's Republic of China
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14
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Wang W, Liao Y, Huang X, Tang C, Cai P. A novel xanthone dimer derivative with antibacterial activity isolated from the bark of Garcinia mangostana. Nat Prod Res 2017; 32:1769-1774. [DOI: 10.1080/14786419.2017.1402315] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Weiyi Wang
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
- State Key Laboratory Breeding Base of Marine Genetic Resources, Fujian Key Laboratory of Marine Genetic Resources, Fujian Collaborative Innovation Centre for Exploitation and Utilization of Marine Biological Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, P. R. China
| | - Yanyan Liao
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
- Xiamen Key Laboratory of Physical Environment, Xiamen, P. R. China
| | - Xiaomei Huang
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
- Xiamen Key Laboratory of Physical Environment, Xiamen, P. R. China
| | - Chao Tang
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
- Xiamen Key Laboratory of Physical Environment, Xiamen, P. R. China
| | - Peng Cai
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
- Xiamen Key Laboratory of Physical Environment, Xiamen, P. R. China
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15
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Trinh BT, Quach TT, Bui DN, Staerk D, Nguyen LHD, Jäger AK. Xanthones from the twigs of Garcinia oblongifolia and their antidiabetic activity. Fitoterapia 2017; 118:126-131. [DOI: 10.1016/j.fitote.2017.03.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 02/27/2017] [Accepted: 03/10/2017] [Indexed: 11/26/2022]
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16
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Wang L, Fu W, Shen Y, Tan H, Xu H. Molecularly Imprinted Polymers for Selective Extraction of Oblongifolin C from Garcinia yunnanensis Hu. Molecules 2017; 22:molecules22040508. [PMID: 28333096 PMCID: PMC6153995 DOI: 10.3390/molecules22040508] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 03/19/2017] [Accepted: 03/21/2017] [Indexed: 11/28/2022] Open
Abstract
Molecularly imprinted polymers (MIPs) were synthesized and applied for the selective extraction of oblongifolin C (OC) from fruit extracts of Garcinia yunnanensis Hu. A series of experiments and computational approaches were employed to improve the efficiency of screening for optimal MIP systems in the study. The molar ratio (1:4) was eventually chosen based on the comparison of the binding energy of the complexes between the template (OC) and the functional monomers using density functional theory (DFT) at the RI-PBE-D3-gCP/def2-TZVP level of theory. The binding characterization and the molecular recognition mechanism of MIPs were further explained using the molecular modeling method along with NMR and IR spectra data. The reusability of this approach was demonstrated in over 20 batch rebinding experiments. A mass of 140.5 mg of OC (>95% purity) was obtained from the 5 g extracts, with 2 g of MIPs with the best binding properties, through a gradient elution program from 35% to 70% methanol-water solution. At the same time, another structural analog, 46.5 mg of guttiferone K (GK) (>88% purity), was also obtained by the gradient elution procedure. Our results showed that the structural analogs could be separated from the crude extracts by the molecularly imprinted solid-phase extraction (MISPE) using a gradient elution procedure for the first time.
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Affiliation(s)
- Liping Wang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China.
| | - Wenwei Fu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China.
| | - Yunhui Shen
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Hongsheng Tan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China.
| | - Hongxi Xu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China.
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17
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Zhang H, Zheng D, Ding ZJ, Lao YZ, Tan HS, Xu HX. UPLC-PDA-QTOFMS-guided isolation of prenylated xanthones and benzoylphloroglucinols from the leaves of Garcinia oblongifolia and their migration-inhibitory activity. Sci Rep 2016; 6:35789. [PMID: 27767059 PMCID: PMC5073302 DOI: 10.1038/srep35789] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 10/04/2016] [Indexed: 12/02/2022] Open
Abstract
A UPLC-PDA-QTOFMS-guided isolation strategy was employed to screen and track potentially new compounds from Garcinia oblongifolia. As a result, two new prenylated xanthones, oblongixanthones D and E (1–2), six new prenylated benzoylphloroglucinol derivatives, oblongifolins V–Z (3–7) and oblongifolin AA (8), as well as a known compound oblongifolin L (9), were isolated from the EtOAc-soluble fraction of an acetone extract of the leaves of Garcinia oblongifolia guided by UPLC-PDA-QTOFMS analysis. The structures of the new compounds were elucidated by 1D- and 2D-NMR spectroscopic analysis and mass spectrometry. Experimental and calculated ECD spectra were used to determine the absolute configurations. The results of wound healing and transwell migration assay showed that oblongixanthones D (1), E (2), and oblongifolin L (9) have the ability to inhibit cancer cell migration in lower cytotoxic concentrations. Western blotting results showed that these compounds exhibited an anti-metastasis effect mainly through downregulating RAF protein levels. In addition, 2 and 9 could inhibit phospho-MEK and phospho-ERK at downstream. Moreover, 1, 2, and 9 could inhibit snail protein level, suggesting that they could regulate the EMT pathway.
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Affiliation(s)
- Hong Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China.,Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China
| | - Dan Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China
| | - Zhi-Jie Ding
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China
| | - Yuan-Zhi Lao
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China.,Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China
| | - Hong-Sheng Tan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China.,Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China
| | - Hong-Xi Xu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China.,Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China
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18
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Zhang H, Zheng D, Li HH, Wang H, Tan HS, Xu HX. Diagnostic filtering to screen polycyclic polyprenylated acylphloroglucinols from Garcinia oblongifolia by ultrahigh performance liquid chromatography coupled with ion mobility quadrupole time-of-flight mass spectrometry. Anal Chim Acta 2016; 912:85-96. [PMID: 26920776 DOI: 10.1016/j.aca.2016.01.039] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 01/05/2016] [Accepted: 01/17/2016] [Indexed: 01/12/2023]
Abstract
A novel multistage MS approach, insource collision-induced dissociation (CID) combined with Time Aligned Parallel (TAP) fragmentation, was established to study the fragmentation behavior of polycyclic polyprenylated acylphloroglucinols (PPAPs), which could provide a more reliable fragmentation relationship between precursor and daughter ions. The diagnostic ions for different subtypes of PPAPs and their fragmentation behaviors have been summarized. Moreover, a new and reliable multidimensional analytical workflow that combines ultrahigh performance liquid chromatography (UHPLC), data-independent mass spectrometry (MS(E)), and tandem MS with ion mobility (IM) has been optimized and established for the analysis of PPAPs in the plant Garcinia oblongifolia by diagnostic filtering. Diagnostic fragment ions were used to selectively screen PPAPs from extracts, whereas IM coupled to MS was used to maximize the peak capacity. Under the optimized UHPLC-IM-MS(E) and UHPLC-IM-MS/MS method, 140 PPAPs were detected from the crude extract of G. oblongifolia, and 10 of them were unambiguously identified by comparing them to the reference compounds. Among those PPAPs, 7 pairs of coeluting isobaric PPAPs that were indistinguishable by conventional UHPLC-HRMS alone, were further resolved using UHPLC-IM-MS. It is anticipated that the proposed method will be extended to the rapid screening and characterization of the other targeted or untargeted compounds, especially these coeluting isomers in complex samples.
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Affiliation(s)
- Hong Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China; Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, PR China
| | - Dan Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China
| | - Hao-Hao Li
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China
| | - Hui Wang
- Solution Center, Waters Technologies Ltd. (Shanghai), Shanghai, 201203, PR China
| | - Hong-Sheng Tan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China; Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, PR China
| | - Hong-Xi Xu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China; Engineering Research Centre of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, PR China.
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19
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Li P, AnandhiSenthilkumar H, Wu SB, Liu B, Guo ZY, Fata JE, Kennelly EJ, Long CL. Comparative UPLC-QTOF-MS-based metabolomics and bioactivities analyses of Garcinia oblongifolia. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1011:179-95. [PMID: 26773895 DOI: 10.1016/j.jchromb.2015.12.061] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2015] [Revised: 12/29/2015] [Accepted: 12/30/2015] [Indexed: 11/29/2022]
Abstract
Garcinia oblongifolia Champ. ex Benth. (Clusiaceae) is a well-known medicinal plant from southern China, with edible fruits. However, the phytochemistry and bioactivity of the different plant parts of G. oblongifolia have not been studied extensively. Comparative metabolic profiling and bioactivities of the leaf, branch, and fruit of G. oblongifolia were investigated. A total of 40 compounds such as biflavonoids, xanthones, and benzophenones were identified using UPLC-QTOF-MS and MS(E), including 15 compounds reported for the first time from this species. Heatmap analyses found that benzophenones, xanthones, and biflavonoids were predominately found in branches, with benzophenones present in relatively high concentrations in all three plant parts. Xanthones were found to have limited distribution in fruit while biflavonoids were present at only low levels in leaves. In addition, the cytotoxic (MCF-7 breast cancer cell line) and antioxidant (ABTS and DPPH chemical tests) activities of the crude extracts of G. oblongifolia indicate that the branch extract exhibits greater bioactivity than either the leaf or the fruit extracts. Orthogonal partial least squares discriminate analysis was used to find 12 marker compounds, mainly xanthones, from the branches, including well-known antioxidants and cytotoxic agents. These G. oblongifolia results revealed that the variation in metabolite profiles can be correlated to the differences in bioactivity of the three plant parts investigated. This UPLC-QTOF-MS strategy can be useful to identify bioactive constituents expressed differentially in the various plant parts of a single species.
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Affiliation(s)
- Ping Li
- College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, PR China
| | - Harini AnandhiSenthilkumar
- Department of Biological Sciences, Lehman College, City University of New York, Bronx, New York 10468, USA; Biochemistry, Biology and Chemistry Ph.D. Programs, The Graduate Center, City University of New York, New York, NY 10016, USA; Department of Biological Sciences, College of Staten Island, Staten Island, New York 10314, USA
| | - Shi-biao Wu
- Department of Biological Sciences, Lehman College, City University of New York, Bronx, New York 10468, USA
| | - Bo Liu
- College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, PR China
| | - Zhi-yong Guo
- College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, PR China
| | - Jimmie E Fata
- Biochemistry, Biology and Chemistry Ph.D. Programs, The Graduate Center, City University of New York, New York, NY 10016, USA; Department of Biological Sciences, College of Staten Island, Staten Island, New York 10314, USA
| | - Edward J Kennelly
- College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, PR China; Department of Biological Sciences, Lehman College, City University of New York, Bronx, New York 10468, USA; Biochemistry, Biology and Chemistry Ph.D. Programs, The Graduate Center, City University of New York, New York, NY 10016, USA.
| | - Chun-lin Long
- College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, PR China; Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, PR China.
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20
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Screening Active Compounds from Garcinia Species Native to China Reveals Novel Compounds Targeting the STAT/JAK Signaling Pathway. BIOMED RESEARCH INTERNATIONAL 2015; 2015:910453. [PMID: 26090459 PMCID: PMC4450297 DOI: 10.1155/2015/910453] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Accepted: 10/09/2014] [Indexed: 12/05/2022]
Abstract
Natural compounds from medicinal plants are important resources for drug development. In a panel of human tumor cells, we screened a library of the natural products from Garcinia species which have anticancer potential to identify new potential therapeutic leads and discovered that caged xanthones were highly effective at suppressing multiple cancer cell lines. Their anticancer activities mainly depended on apoptosis pathways. For compounds in sensitive cancer line, their mechanisms of mode of action were evaluated. 33-Hydroxyepigambogic acid and 35-hydroxyepigambogic acid exhibited about 1 μM IC50 values against JAK2/JAK3 kinases and less than 1 μM IC50 values against NCI-H1650 cell which autocrined IL-6. Thus these two compounds provided a new antitumor molecular scaffold. Our report describes 33-hydroxyepigambogic acid and 35-hydroxyepigambogic acid that inhibited NCI-H1650 cell growth by suppressing constitutive STAT3 activation via direct inhibition of JAK kinase activity.
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21
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Wang X, Lao Y, Xu N, Xi Z, Wu M, Wang H, Li X, Tan H, Sun M, Xu H. Oblongifolin C inhibits metastasis by up-regulating keratin 18 and tubulins. Sci Rep 2015; 5:10293. [PMID: 25973684 PMCID: PMC4431421 DOI: 10.1038/srep10293] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Accepted: 04/08/2015] [Indexed: 12/22/2022] Open
Abstract
Tumor metastasis is the main cause of cancer-related patient death. In this study, we performed a wound healing migration screen to search for a metastatic inhibitor within our library of natural compounds. We found that oblongifolin C (OC), a natural compound extracted from Garcinia yunnanensis Hu, is an effective inhibitor of metastasis in human esophageal squamous carcinoma Eca109 cells. The transwell migration and matrigel invasion assay results also showed that OC inhibits the migration of Eca109 cells and HepG2 cells. OC can increase the expression of tubulin, indicating that OC inhibits metastasis via tubulin aggregation. In addition, the Western blotting, real-time PCR, and immunostaining results indicated that OC increases the expression of keratin18. Furthermore, the knockdown of keratin 18 by small interfering RNAs inhibited the expression of tubulin and increased the metastasis of cancer cells, suggesting that keratin 18 is the upstream signal of tubulin and plays a vital role in metastasis. A subsequent study in a tail vein injection metastasis model showed that OC can significantly inhibit pulmonary metastasis, as revealed by immunohistochemistry staining. Taken together, our results suggest that OC inhibits metastasis through the induction of the expression of keratin 18 and may be useful in cancer therapy.
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Affiliation(s)
- Xiaoyu Wang
- 1] School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China [2] Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China
| | - Yuanzhi Lao
- 1] School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China [2] Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China
| | - Naihan Xu
- Key Lab in Healthy Science and Technology, Division of Life Science, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, P.R. China
| | - Zhichao Xi
- 1] School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China [2] Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China
| | - Man Wu
- 1] School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China [2] Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China
| | - Hua Wang
- Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong, P. R. China
| | - Xiyi Li
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, 200032, P.R. China
| | - Hongsheng Tan
- 1] School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China [2] Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China
| | - Menghong Sun
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, 200032, P.R. China
| | - Hongxi Xu
- 1] School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China [2] Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China
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22
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Li X, Lao Y, Zhang H, Wang X, Tan H, Lin Z, Xu H. The natural compound Guttiferone F sensitizes prostate cancer to starvation induced apoptosis via calcium and JNK elevation. BMC Cancer 2015; 15:254. [PMID: 25885018 PMCID: PMC4394563 DOI: 10.1186/s12885-015-1292-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 03/30/2015] [Indexed: 12/31/2022] Open
Abstract
Background In a cytotoxicity screen in serum-free medium, Guttiferone F showed strong growth inhibitory effect against prostate cancer cells. Methods Prostate cancer cells LNCaP and PC3 were treated with Guttiferone F in serum depleted medium. Sub-G1 phase distributions were estimated with flow cytometry. Mitochondrial disruption was observed under confocal microscope using Mitotracker Red staining. Gene and protein expression changes were detected by real-time PCR and Western blotting. Ca2+ elevation was examined by Fluo-4 staining under fluorescence microscope. PC3 xenografts in mice were examined by immunohistochemical analysis. Results Guttiferone F had strong growth inhibitory effect against prostate cancer cell lines under serum starvation. It induced a significant increase in sub-G1 fraction and DNA fragmentation. In serum-free medium, Guttiferone F triggered mitochondria dependent apoptosis by regulating Bcl-2 family proteins. In addition, Guttiferone F attenuated the androgen receptor expression and phosphorylation of ERK1/2, while activating the phosphorylation of JNK and Ca2+ flux. Combination of caloric restriction with Guttiferone F in vivo could increase the antitumor effect without causing toxicity. Conclusions Guttiferone F induced prostate cancer cell apoptosis under serum starvation via Ca2+ elevation and JNK activation. Combined with caloric restriction, Guttiferone F exerted significant growth inhibition of PC3 cells xenograft in vivo. Guttiferone F is therefore a potential anti-cancer compound. Electronic supplementary material The online version of this article (doi:10.1186/s12885-015-1292-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xin Li
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China.
| | - Yuanzhi Lao
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China.
| | - Hong Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China.
| | - Xiaoyu Wang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China.
| | - Hongsheng Tan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China.
| | - Zhixiu Lin
- School of Chinese Medicine, Faculty of Science, The Chinese University of Hong Kong, Shatin, N.T, Hong Kong, SAR, China.
| | - Hongxi Xu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, 201203, P.R. China.
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23
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Gao C, Shi R, Wang T, Tan H, Xu H, Ma Y. Interaction between oblongifolin C and UDP-glucuronosyltransferase isoforms in human liver and intestine microsomes. Xenobiotica 2015; 45:578-85. [DOI: 10.3109/00498254.2015.1004205] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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24
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Fu W, Wu M, Zhu L, Lao Y, Wang L, Tan H, Yuan Q, Xu H. Prenylated benzoylphloroglucinols and biphenyl derivatives from the leaves of Garcinia multiflora Champ. RSC Adv 2015. [DOI: 10.1039/c5ra09213b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Garcimultiflorone I (2), isolated from the leaves of Garcinia multiflora, exhibits significant inhibitory activity against the human SGC7901 and HCT116 cell lines that targets the cell cycle through apoptosis signaling pathways.
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Affiliation(s)
- Wenwei Fu
- School of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery
| | - Man Wu
- School of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery
| | - Lunlun Zhu
- School of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery
| | - Yuanzhi Lao
- School of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery
| | - Liping Wang
- School of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery
| | - Hongsheng Tan
- School of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery
| | - Qinghong Yuan
- Department of Physics
- East China Normal University
- Shanghai 200241
- People's Republic of China
| | - Hongxi Xu
- School of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- People's Republic of China
- Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery
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25
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Hu Q, Meng Y, Yao J, Qin Y, Yang Z, Zhao G, Yang Z, Gao X, Li T. Flavonoids from Garcinia paucinervis and their Biological Activities. Chem Nat Compd 2014. [DOI: 10.1007/s10600-014-1144-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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26
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Linghu L, Fan H, Hu Y, Zou Y, Yang P, Lan X, Liao Z, Chen M. Mirabijalone E: a novel rotenoid from Mirabilis himalaica inhibited A549 cell growth in vitro and in vivo. JOURNAL OF ETHNOPHARMACOLOGY 2014; 155:326-333. [PMID: 24882730 DOI: 10.1016/j.jep.2014.05.034] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 05/20/2014] [Accepted: 05/21/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The roots of Mirabilis himalaica have been used in Tibetan folk medicine for treatment of uterine cancer, nephritis edematous, renal calculus and arthrodynia. In our previous work, the ethanol extract of roots had shown potent cytotoxicity against human cancer cells. However, no information is available on the antitumor effect of Mirabilis himalaica. The aim of the present study was to investigate the active constituents guided by bioassay and evaluate the related antitumor efficacy in vitro and in vivo. MATERIALS AND METHODS The active subextract (ethyl acetate) was subjected to successive chemical separation using a combination of silica gel, LH-20 chromatography and semi-preparative HPLC. The structures were determined by spectroscopic analysis techniques such as nuclear magnetic resonance (NMR) and mass spectrometry. Three human cancer cell lines, A549, HepG2 and HeLa were used for in vitro cytotoxicity evaluation of all isolated compounds by MTT-assay. Then, the potent and novel compound mirabijalone E was employed to the mechanism study againstA549 cells. BrdU immunofluorescence, soft agar assay and cell cycle analysis were employed to detect the cell proliferation effects. Annexin V-FITC/PI staining assay was used for examining apoptotic effects. Expression levels of apoptosis-related proteins were determined by western blot assay. in vivo tumorigenic assay was used to evaluate the xenograft tumor growth treated with mirabijalone E. RESULTS One new rotenoid compound, mirabijalone E, together with eight known rotenoids was isolated from Mirabilis himalaica. Mirabijalone E, 9-O-methyl-inone B, boeravinone C and boeravinone H exhibited cytotoxicity against A 549 and HeLa cells. Further study on mirabijalone E was carried out in vitro and in vivo. Mirabijalone E inhibited A549 cells growth in a time and dose-dependent manner, which arrested cell cycle in S phase. Mechanistically, mirabijalone E treatment resulted in the increase of Bax expression level, the decrease of Bcl-2 level and the activation of caspase-3, which suggested the activation of apoptosis cascades. Consequently, the xenograft treated with mirabijalone E showed markedly suppressed tumor growth. CONCLUSIONS The result suggested that mirabijalone E, together with active compounds, 9-O-methyl-4-hydroxyboeravinone B, boeravinone C and boeravinone H could be a promising candidate for cancer therapy.
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Affiliation(s)
- Lang Linghu
- Key Laboratory on Luminescence and Real-Time Analysis (Ministry of Education), College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China
| | - Haixia Fan
- Key Laboratory on Luminescence and Real-Time Analysis (Ministry of Education), College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China
| | - Yijie Hu
- Key Laboratory on Luminescence and Real-Time Analysis (Ministry of Education), College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China
| | - Yanling Zou
- Key Laboratory on Luminescence and Real-Time Analysis (Ministry of Education), College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China
| | - Panpan Yang
- Key Laboratory on Luminescence and Real-Time Analysis (Ministry of Education), College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China
| | - Xiaozhong Lan
- Agriculture and Animal Husbandry College, Tibet University, Nyingchi, Tibet 860000, PR China
| | - Zhihua Liao
- School of Life Sciences, Southwest University, Chongqing 400715, PR China
| | - Min Chen
- Key Laboratory on Luminescence and Real-Time Analysis (Ministry of Education), College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China.
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Lao Y, Wang X, Xu N, Zhang H, Xu H. Application of proteomics to determine the mechanism of action of traditional Chinese medicine remedies. JOURNAL OF ETHNOPHARMACOLOGY 2014; 155:1-8. [PMID: 24862488 DOI: 10.1016/j.jep.2014.05.022] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 05/18/2014] [Accepted: 05/18/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The rationale for using traditional Chinese medicine (TCM) is based on the experience that has been gained from its wide use over thousands of years. However, the mechanisms of action of many TCM are still unclear. Proteomics, which mainly characterizes protein functions, protein-protein interactions, and protein modification in tissues or animals, can be used to investigate signaling pathway perturbations in cells or the whole body. Proteomics has improved the discovery process of effective TCM compounds, and has helped to elucidate their possible mechanisms of action. Therefore, a systematic review of the application of proteomics on TCM research is of great importance and necessity. This review strives to describe the literature on the application of proteomics to elucidate the mechanism of action of TCM on various diseases, and provide the essential discussion on the further utilization of proteomics data to accelerate TCM research. MATERIALS AND METHODS Literature survey was performed via electronic search on Pubmed with keywords 'Proteomics' and 'Traditional Chinese Medicine'. The papers written in English were acquired and analyzed in this review. RESULTS This review mainly summarizes the application of proteomics to investigate TCM remedies for neuronal disease, cancer, cardiovascular disease, diabetes, and immunology-related disease. CONCLUSIONS Researchers have applied proteomics to study the mechanism of action of TCM and made substantial progresses. Further studies are required to determine the protein targets of the active compounds, analyze the mechanism of actions in patients, compare the clinical effects with western medicine.
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Affiliation(s)
- Yuanzhi Lao
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, PR China
| | - Xiaoyu Wang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, PR China
| | - Naihan Xu
- Key Lab in Healthy Science and Technology, Division of Life Science, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China
| | - Hongmei Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, PR China
| | - Hongxi Xu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China; Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, PR China.
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Zhang H, Zhang DD, Lao YZ, Fu WW, Liang S, Yuan QH, Yang L, Xu HX. Cytotoxic and anti-inflammatory prenylated benzoylphloroglucinols and xanthones from the twigs of Garcinia esculenta. JOURNAL OF NATURAL PRODUCTS 2014; 77:1700-7. [PMID: 24960143 DOI: 10.1021/np5003498] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Five new prenylated benzoylphloroglucinol derivatives, garciesculentones A-E (1-5), a new xanthone, garciesculenxanthone A (6), and 15 known compounds were isolated from the petroleum ether extract and the EtOAc-soluble fraction of a 80% (v/v) EtOH extract of Garcinia esculenta. The structures of the new compounds were elucidated by 1D- and 2D-NMR spectroscopic analysis and mass spectrometry. Experimental and calculated ECD and a convenient modified Mosher's method were used to determine the absolute configurations. The cytotoxicity of these compounds were evaluated by MTT assay against three human cancer cell lines (HepG2, MCF-7, and MDA-MB-231) and against normal hepatic cells (HL-7702). In addition, these isolates were evaluated for their inhibitory effects on interferon-γ plus lipopolysaccharide-induced nitric oxide production in RAW264.7 cells.
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Affiliation(s)
- Hong Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine , Cai Lun Lu 1200, Shanghai 201203, People's Republic of China
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Feng C, Huang SX, Gao XM, Xu HX, Luo KQ. Characterization of proapoptotic compounds from the bark of Garcinia oblongifolia. JOURNAL OF NATURAL PRODUCTS 2014; 77:1111-1116. [PMID: 24754786 DOI: 10.1021/np4007316] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Twenty compounds from Garcinia oblongifolia were screened for proapoptotic activity using FRET-based HeLa-C3 sensor cells. Among them, oblongifolins F and G (1 and 2), 1,3,5-trihydroxy-13,13-dimethyl-2H-pyran[7,6-b]xanthone (3), nigrolineaxanthone T (4), and garcicowin B (5) showed significant proapoptotic activity at a concentration of 10 μM. Bioassessments were then performed to evaluate the potential of these compounds for therapeutic application. All five compounds showed significant cytotoxicity and caspase-3-activating ability in cervical cancer HeLa cells, with compounds 1 and 2 having the highest potencies. All five compounds specifically induced caspase-dependent apoptosis, which could be prevented by the pan-caspase inhibitor zVAD-fmk. In particular, 3 induced apoptosis through mitotic arrest. Compounds 1-5 displayed similar IC50 values (3.9-16.5 μM) against the three cancer cell lines HeLa, MDA-MB-435, and HepG2. In addition, compounds 1, 2, and 4 exhibited similar and potent IC50 values (2.4-5.1 μM) against several breast and colon cancer cell lines, including those overexpressing either HER2 or P-glycoprotein. HER2 and P-glycoprotein are known factors that confer resistance to anticancer drugs in cancer cells. This is the first study on the cytotoxicity, caspase-3-activing ability, and specificity of proapoptotic compounds isolated from G. oblongifolia in HeLa cells. The potential application of these compounds against HER2- or P-glycoprotein-overexpressing cancer cells was investigated.
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Affiliation(s)
- Chao Feng
- Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Hong Kong
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Zhang H, Tao L, Fu WW, Liang S, Yang YF, Yuan QH, Yang DJ, Lu AP, Xu HX. Prenylated benzoylphloroglucinols and xanthones from the leaves of Garcinia oblongifolia with antienteroviral activity. JOURNAL OF NATURAL PRODUCTS 2014; 77:1037-46. [PMID: 24679044 DOI: 10.1021/np500124e] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
An acetone extract of the leaves of Garcinia oblongifolia showed antiviral activity against enterovirus 71 (EV71) using a cytopathic effect inhibition assay. Bioassay-guided fractionation yielded 12 new prenylated benzoylphloroglucinols, oblongifolins J-U (1-12), and five known compounds. The structures of 1-12 were elucidated by spectroscopic analysis including 1D- and 2D-NMR and mass spectrometry methods. The absolute configurations were determined by a combination of a Mosher ester procedure carried out in NMR tubes and ECD calculations. Compared to ribavirin (IC50 253.1 μM), compounds 1, 4, and 13 exhibited significant anti-EV71 activity in vitro, with IC50 values of 31.1, 16.1, and 12.2 μM, respectively. In addition, the selectivity indices of these compounds were 1.5, 2.4, and 3.0 in African green monkey kidney (Vero) cells, respectively.
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Affiliation(s)
- Hong Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine , Cai Lun Lu 1200, Shanghai 201203, People's Republic of China
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Lao Y, Wan G, Liu Z, Wang X, Ruan P, Xu W, Xu D, Xie W, Zhang Y, Xu H, Xu N. The natural compound oblongifolin C inhibits autophagic flux and enhances antitumor efficacy of nutrient deprivation. Autophagy 2014; 10:736-49. [PMID: 24642486 PMCID: PMC5119057 DOI: 10.4161/auto.28034] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Metabolic stress induces autophagy as an alternative source of energy and metabolites. Insufficient autophagy in nutrient-deprived cancer cells would be beneficial for cancer therapy. Here, we performed a functional screen in search of novel autophagy regulators from natural products. We showed that oblongifolin C (OC), a natural small molecule compound extracted from Garcinia yunnanensis Hu, is a potent autophagic flux inhibitor. Exposure to OC results in an increased number of autophagosomes and impaired degradation of SQSTM1/p62. Costaining of GFP-LC3B with LysoTracker Red or LAMP1 antibody demonstrates that autophagosome-lysosome fusion is blocked by OC treatment. Furthermore, OC inhibits lysosomal proteolytic activity by altering lysosomal acidification and downregulating the expression of lysosomal cathepsins. Importantly, OC can eliminate the tolerance of cancer cells to nutrient starvation. Starvation dramatically increases the susceptibility of cancer cells to OC-induced CASP3-dependent apoptosis in vitro. Subsequent studies in xenograft mouse model showed that OC has anticancer potency as revealed by increased staining of cleaved CASP3, LC3 puncta, and SQSTM1, as well as reduced expression of lysosomal cathepsins. Combined treatment with OC and caloric restriction potentiates anticancer efficacy of OC in vivo. Collectively, these data demonstrated that OC is a novel autophagic flux inhibitor and might be useful in anticancer therapy.
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Affiliation(s)
- Yuanzhi Lao
- School of Pharmacy; Shanghai University of Traditional Chinese Medicine; Shanghai, China
| | - Gang Wan
- Key Lab in Healthy Science and Technology; Division of Life Science; Graduate School at Shenzhen; Tsinghua University; Shenzhen,China; School of Life Sciences; Tsinghua University; Beijing, China
| | - Zhenyan Liu
- School of Pharmacy; Shanghai University of Traditional Chinese Medicine; Shanghai, China
| | - Xiaoyu Wang
- School of Pharmacy; Shanghai University of Traditional Chinese Medicine; Shanghai, China
| | - Ping Ruan
- Department of Pathology; Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine; Nanning, China
| | - Wei Xu
- Key Lab in Healthy Science and Technology; Division of Life Science; Graduate School at Shenzhen; Tsinghua University; Shenzhen,China; School of Life Sciences; Tsinghua University; Beijing, China
| | - Danqing Xu
- School of Pharmacy; Shanghai University of Traditional Chinese Medicine; Shanghai, China; Department of Discovery Technologies; Roche R&D Center (China) Ltd; Shanghai, China
| | - Weidong Xie
- Key Lab in Healthy Science and Technology; Division of Life Science; Graduate School at Shenzhen; Tsinghua University; Shenzhen,China
| | - Yaou Zhang
- Key Lab in Healthy Science and Technology; Division of Life Science; Graduate School at Shenzhen; Tsinghua University; Shenzhen,China
| | - Hongxi Xu
- School of Pharmacy; Shanghai University of Traditional Chinese Medicine; Shanghai, China
| | - Naihan Xu
- Key Lab in Healthy Science and Technology; Division of Life Science; Graduate School at Shenzhen; Tsinghua University; Shenzhen,China
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Fu WM, Wang WM, Wang H, Zhu X, Liang Y, Kung HF, Zhang JF. 1,3,5-Trihydroxy-13,13-dimethyl-2H-pyran [7,6-b] xanthone directly targets heat shock protein 27 in hepatocellular carcinoma. Cell Biol Int 2013; 38:272-6. [PMID: 24123829 DOI: 10.1002/cbin.10193] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 09/05/2013] [Indexed: 01/06/2023]
Abstract
We previously showed that the small molecule 1,3,5-trihydroxy-13,13-dimethyl-2H-pyran [7,6-b] xanthone (TDP) induces apoptosis in hepatocellular carcinoma (HCC) by suppressing Hsp27 expression, although the mechanism is not fully understood. To investigate the functional association between TDP and Hsp27 protein in HCC, recombinant Hsp27 protein was incubated with TDP at room temperature, and assayed by mass spectrum (MS) and natural electrophoresis. TDP effectively stimulated Hsp27 to form aggregates ex vitro, leading to suppression of its chaperone activity. The aggregates were degraded by the ubiquitin-proteasome (UPS) pathway. TDP directly interacted with Asp17 and Phe55 in chain C of Hsp27 on the basis of bioinformatic prediction. In conclusion, Hsp27 is a direct target of TDP in its anti-cancer activity, which provides strong support for a clinical application.
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Affiliation(s)
- Wei-Ming Fu
- Institute Guangzhou of Advanced Technology, Chinese Academy of Sciences, Guanzhou, P.R. China; School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, P.R. China
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Feng S, Jiang Y, Li J, Qiu S, Chen T. A new bixanthone derivative from the bark of Garcinia oblongifolia. Nat Prod Res 2013; 28:81-5. [DOI: 10.1080/14786419.2013.841686] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Shixiu Feng
- Key Laboratory of Southern Subtropical Plant Diversity, Shenzhen Fairy Lake Botanical Garden, Chinese Academy of Sciences, 160 Xianhu Road, Luohu District, Shenzhen 518004, P.R. China
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou 510650, P.R. China
| | - Yuyang Jiang
- The Key Laboratory of Chemical Biology, Guangdong Province, Division of Life Science, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, P.R. China
| | - Jiong Li
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems Ecosystems, South China Botanical Garden, Chinese Academy of Sciences 510650, P.R. China
| | - Shengxiang Qiu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou 510650, P.R. China
| | - Tao Chen
- Key Laboratory of Southern Subtropical Plant Diversity, Shenzhen Fairy Lake Botanical Garden, Chinese Academy of Sciences, 160 Xianhu Road, Luohu District, Shenzhen 518004, P.R. China
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Ito C, Matsui T, Noda E, Ruangrungsi N, Itoigawa M. Biphenyl Derivatives from Garcinia Schomburgkiana and the Cytotoxicity of the Isolated Compounds. Nat Prod Commun 2013. [DOI: 10.1177/1934578x1300800921] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Study of the chemical constituents of the stems of Garcinia schomburgkiana Pierre (Guttiferae), collected in Thailand, led to the isolation and identification of five known compounds and two new biphenyl derivatives, schomburgbiphenyl A (1) and B (2). Six phenolic compounds isolated from this plant were screened for their cell growth inhibition activity using several human leukemia cell lines. One compound, oblongifolin C (7), showed significant cytotoxic activity towards Jurkat, NALM6, K562 and HPB-ALL cells.
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Affiliation(s)
- Chihiro Ito
- Department of Medicinal Chemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Takuya Matsui
- Department of Physiology, Aichi Medical University, Yazako-karimata 1-1 Nagakute, Aichi 480-1195, Japan
| | - Eri Noda
- Department of Medicinal Chemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | | | - Masataka Itoigawa
- Department of Medicinal Chemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
- School of Sport and Health Science, Tokai Gakuen University, 21-233 Nishinohora, Ukigai, Miyoshi, Aichi 470-0207, Japan
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Kumar S, Sharma S, Chattopadhyay SK. The potential health benefit of polyisoprenylated benzophenones from Garcinia and related genera: Ethnobotanical and therapeutic importance. Fitoterapia 2013; 89:86-125. [DOI: 10.1016/j.fitote.2013.05.010] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 05/09/2013] [Accepted: 05/10/2013] [Indexed: 10/26/2022]
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Mungmee C, Sitthigool S, Buakeaw A, Suttisri R. A new biphenyl and other constituents from the wood of Garcinia schomburgkiana. Nat Prod Res 2013; 27:1949-55. [DOI: 10.1080/14786419.2013.796469] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Chutichot Mungmee
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Supotchana Sitthigool
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Anumart Buakeaw
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Rutt Suttisri
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, 10330, Thailand
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Ye H, Fu A, Wu W, Li Y, Wang G, Tang M, Li S, He S, Zhong S, Lai H, Yang J, Xiang M, Peng A, Chen L. Cytotoxic and apoptotic effects of constituents from Millettia pachycarpa Benth. Fitoterapia 2012; 83:1402-8. [DOI: 10.1016/j.fitote.2012.08.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 07/28/2012] [Accepted: 08/03/2012] [Indexed: 01/13/2023]
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Fu WM, Zhang JF, Wang H, Tan HS, Wang WM, Chen SC, Zhu X, Chan TM, Tse CM, Leung KS, Lu G, Xu HX, Kung HF. Apoptosis induced by 1,3,6,7-tetrahydroxyxanthone in Hepatocellular carcinoma and proteomic analysis. Apoptosis 2012; 17:842-51. [PMID: 22610480 DOI: 10.1007/s10495-012-0729-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Gamboge is a traditional Chinese medicine and our previous study showed that gambogic acid and gambogenic acid suppress the proliferation of HCC cells. In the present study, another active component, 1,3,6,7-tetrahydroxyxanthone (TTA), was identified to effectively suppress HCC cell growth. In addition, our Hoechst-PI staining and flow cytometry analyses indicated that TTA induced apoptosis in HCC cells. In order to identify the targets of TTA in HCC cells, a two-dimensional gel electrophoresis was performed, and proteins in different expressions were identified by MALDA-TOF MS and MS/MS analyses. In summary, eighteen proteins with different expressions were identified in which twelve were up-regulated and six were down-regulated. Among them, the four most distinctively expressed proteins were further studied and validated by western blotting. The β-tubulin and translationally controlled tumor protein were decreased while the 14-3-3σ and P16 protein expressions were up-regulated. In addition, TTA suppressed tumorigenesis partially through P16-pRb signaling. 14-3-3σ silence reversed the suppressive effect of cell growth and apoptosis induced by introducing TTA. In conclusion, TTA effectively suppressed cell growth through, at least partially, up-regulation of P16 and 14-3-3σ.
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Affiliation(s)
- Wei-ming Fu
- Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Shatin, Hong Kong, People's Republic of China
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Xia ZX, Zhang DD, Liang S, Lao YZ, Zhang H, Tan HS, Chen SL, Wang XH, Xu HX. Bioassay-guided isolation of prenylated xanthones and polycyclic acylphloroglucinols from the leaves of Garcinia nujiangensis. JOURNAL OF NATURAL PRODUCTS 2012; 75:1459-64. [PMID: 22871217 DOI: 10.1021/np3003639] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Bioassay-guided fractionation of the acetone extract of the leaves of Garcinia nujiangensis resulted in the isolation of two new prenylated xanthones, nujiangexanthones A (1) and B (2), three new polycyclic polyprenylated acylphloroglucinols, nujiangefolins A-C (3-5), and 10 known related analogues. The structures of compounds 1-5 were elucidated by interpretation of their spectroscopic data. Compounds 3 and 4 are unusual polycyclic polyprenylated acylphloroglucinols in which the enol hydroxy group forms a six-membered ring with a benzene ring carbon. The compounds isolated were evaluated for their cytotoxic effects against 11 cancer cell lines and immortalized MIHA normal liver cells, and the test substances demonstrated selectivity toward the cancer cells. Isojacareubin (6) was found to be the most potent cytotoxic compound of those tested.
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Affiliation(s)
- Zheng-Xiang Xia
- Shanghai University of Traditional Chinese Medicine, Shanghai 201203, People's Republic of China
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Polyisoprenylated acylphloroglucinols and a polyisoprenylated tetracyclic xanthone from the bark of Calophyllum thorelii. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.05.096] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Fu WM, Zhang JF, Wang H, Xi ZC, Wang WM, Zhuang P, Zhu X, Chen SC, Chan TM, Leung KS, Lu G, Xu HX, Kung HF. Heat shock protein 27 mediates the effect of 1,3,5-trihydroxy-13,13-dimethyl-2H-pyran [7,6-b] xanthone on mitochondrial apoptosis in hepatocellular carcinoma. J Proteomics 2012; 75:4833-43. [DOI: 10.1016/j.jprot.2012.05.032] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 05/18/2012] [Accepted: 05/18/2012] [Indexed: 01/11/2023]
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43
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Synthetic studies toward geranylated PPAP natural products oblongifolin A, oblongifolin D, and enervosanone. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.06.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Zhu X, Fu A, Luo KQ. A high-throughput fluorescence resonance energy transfer (FRET)-based endothelial cell apoptosis assay and its application for screening vascular disrupting agents. Biochem Biophys Res Commun 2012; 418:641-6. [PMID: 22290227 DOI: 10.1016/j.bbrc.2012.01.066] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Accepted: 01/13/2012] [Indexed: 01/01/2023]
Abstract
In this study, we developed a high-throughput endothelial cell apoptosis assay using a fluorescence resonance energy transfer (FRET)-based biosensor. After exposure to apoptotic inducer UV-irradiation or anticancer drugs such as paclitaxel, the fluorescence of the cells changed from green to blue. We developed this method into a high-throughput assay in 96-well plates by measuring the emission ratio of yellow fluorescent protein (YFP) to cyan fluorescent protein (CFP) to monitor the activation of a key protease, caspase-3, during apoptosis. The Z' factor for this assay was above 0.5 which indicates that this assay is suitable for a high-throughput analysis. Finally, we applied this functional high-throughput assay for screening vascular disrupting agents (VDA) which could induce endothelial cell apoptosis from our in-house compounds library and dioscin was identified as a hit. As this assay allows real time and sensitive detection of cell apoptosis, it will be a useful tool for monitoring endothelial cell apoptosis in living cell situation and for identifying new VDA candidates via a high-throughput screening.
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Affiliation(s)
- Xiaoming Zhu
- Division of Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore
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Pardo-Andreu GL, Nuñez-Figueredo Y, Tudella VG, Cuesta-Rubio O, Rodrigues FP, Pestana CR, Uyemura SA, Leopoldino AM, Alberici LC, Curti C. The anti-cancer agent guttiferone-A permeabilizes mitochondrial membrane: ensuing energetic and oxidative stress implications. Toxicol Appl Pharmacol 2011; 253:282-9. [PMID: 21549140 DOI: 10.1016/j.taap.2011.04.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 04/02/2011] [Accepted: 04/18/2011] [Indexed: 11/17/2022]
Abstract
Guttiferone-A (GA) is a natural occurring polyisoprenylated benzophenone with cytotoxic action in vitro and anti-tumor action in rodent models. We addressed a potential involvement of mitochondria in GA toxicity (1-25 μM) toward cancer cells by employing both hepatic carcinoma (HepG2) cells and succinate-energized mitochondria, isolated from rat liver. In HepG2 cells GA decreased viability, dissipated mitochondrial membrane potential, depleted ATP and increased reactive oxygen species (ROS) levels. In isolated rat-liver mitochondria GA promoted membrane fluidity increase, cyclosporine A/EGTA-insensitive membrane permeabilization, uncoupling (membrane potential dissipation/state 4 respiration rate increase), Ca²⁺ efflux, ATP depletion, NAD(P)H depletion/oxidation and ROS levels increase. All effects in cells, except mitochondrial membrane potential dissipation, as well as NADPH depletion/oxidation and permeabilization in isolated mitochondria, were partly prevented by the a NAD(P)H regenerating substrate isocitrate. The results suggest the following sequence of events: 1) GA interaction with mitochondrial membrane promoting its permeabilization; 2) mitochondrial membrane potential dissipation; 3) NAD(P)H oxidation/depletion due to inability of membrane potential-sensitive NADP+ transhydrogenase of sustaining its reduced state; 4) ROS accumulation inside mitochondria and cells; 5) additional mitochondrial membrane permeabilization due to ROS; and 6) ATP depletion. These GA actions are potentially implicated in the well-documented anti-cancer property of GA/structure related compounds.
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Affiliation(s)
- Gilberto L Pardo-Andreu
- Centro de Estudio para las Investigaciones y Evaluaciones Biológicas, Instituto de Farmacia y Alimentos, Universidad de La Habana, Ave. 23 # 21425 e/214 and 222, La Coronela, La Lisa, CP 13600, Ciudad Habana, Cuba.
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Synthetic studies toward the PPAP natural products, prolifenones A and B and hyperforin: an Effenberger cyclization approach. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.07.171] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Zhou Y, Lee S, Choi FFK, Xu G, Liu X, Song JZ, Li SL, Qiao CF, Xu HX. Qualitative and quantitative analysis of polycyclic polyprenylated acylphloroglucinols from Garcinia species using ultra performance liquid chromatography coupled with electrospray ionization quadrupole time-of-flight tandem mass spectrometry. Anal Chim Acta 2010; 678:96-107. [DOI: 10.1016/j.aca.2010.08.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2010] [Revised: 08/08/2010] [Accepted: 08/09/2010] [Indexed: 11/27/2022]
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Liu X, Yu T, Gao XM, Zhou Y, Qiao CF, Peng Y, Chen SL, Luo KQ, Xu HX. Apoptotic effects of polyprenylated benzoylphloroglucinol derivatives from the twigs of Garcinia multiflora. JOURNAL OF NATURAL PRODUCTS 2010; 73:1355-1359. [PMID: 20681570 DOI: 10.1021/np100156w] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
With bioassay-guided fractionation, five new polyprenylated benzoylphloroglucinol derivatives, garcimultiflorone D (1), 18-hydroxygarcimultiflorone D (2), garcimultiflorone E (3), garcimultiflorone F (4), and isogarcimultiflorone F (5), and five known compounds, guttiferone E (6), guttiferone F (7), aristophenone A (8), isoxanthochymol (9), and morelloflavone (10), were isolated from the acetone extract of the twigs of Garcinia multiflora. The compounds were evaluated for their apoptotic effects against HeLa-C3 cells, which have been genetically engineered to produce a fluorescent biosensor capable of detecting caspase-3 activation. Compounds 1 and 3-9 activate caspase-3 in HeLa-C3 cells within 72 h after treatment at a concentration of 100 microM or lower. In particular, compounds 6, 8, and 9 showed strong apoptosis-inducing effects at a concentration of 25 microM.
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Affiliation(s)
- Xin Liu
- Chinese Medicine Laboratory, Hong Kong Jockey Club Institute of Chinese Medicine, Shatin, NT, Hong Kong, People's Republic of China
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McGrath NA, Binner JR, Markopoulos G, Brichacek M, Njardarson JT. An efficient oxidative dearomatization-radical cyclization approach to symmetrically substituted bicyclic guttiferone natural products. Chem Commun (Camb) 2010; 47:209-11. [PMID: 20607196 DOI: 10.1039/c0cc01419b] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Detailed in this communication is an efficient synthetic approach towards the guttiferone family of natural products. Oxidatively unraveling a para-quinone monoketal followed by consecutive 5-exo radical cyclizations provides the bicyclic core. An additional strength of this approach is a late stage asymmetric desymmetrization of an advanced symmetric intermediate.
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Affiliation(s)
- Nicholas A McGrath
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, NY, USA
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Gao XM, Yu T, Lai FSF, Zhou Y, Liu X, Qiao CF, Song JZ, Chen SL, Luo KQ, Xu HX. Identification and evaluation of apoptotic compounds from Garcinia paucinervis. Bioorg Med Chem 2010; 18:4957-64. [DOI: 10.1016/j.bmc.2010.06.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2010] [Revised: 06/03/2010] [Accepted: 06/04/2010] [Indexed: 11/25/2022]
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