1
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Said AAE, Mahmoud BK, Helmy AM, Mohamed NM, Attia EZ, Samy MN, Abdelmohsen UR, Fouad MA. Niosomes as promising approach for enhancing the cytotoxicity of Hemimycale sp. total crude extract supported with in-silico studies. Sci Rep 2024; 14:2546. [PMID: 38291122 PMCID: PMC10827731 DOI: 10.1038/s41598-024-52918-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Accepted: 01/25/2024] [Indexed: 02/01/2024] Open
Abstract
The crude extract of Hemimycale sp. marine sponge was evaluated as a cytotoxic drug against different cell lines; whereas it exhibited promising selective activity toward the breast cancer cell line only with IC50 value 199.6 ± 0.00512 µg/ml. Moreover, its cytotoxic activity against the breast cancer cell line was reevaluated upon forming total extract-loaded niosomes. This revealed an IC50 value of 44.35 ± 0.011128 µg/ml, indicating the potential contribution of niosomes in boosting cell penetration and activity as a result. Owing to highlight the bioactive constituents responsible for the cytotoxic activity, metabolomics profiling of Hemimycale sp. was performed using liquid chromatography coupled with high-resolution electrospray ionization mass spectrometry (LC-HR-ESI-MS) revealing tentative identification of phytoconstituents clusters like as, diterpenes, sesterterpenes and sterols. Additionally, the cytotoxic activity of the crude extract was explained on the molecular level, whereas the dereplicated compounds were evaluated in silico against the Epidermal Growth Factor Receptor tyrosine kinase (EGFR). The sesterterpenoid derivatives phorbaketal A acetate (12) and secoepoxy ansellone A (13) together with mycalol-522 (17) showed the best binding energy.
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Affiliation(s)
- Asmaa Abo Elgoud Said
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, 61519, Egypt
| | - Basma Khalaf Mahmoud
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, 61519, Egypt
| | - Abdelrahman M Helmy
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Deraya University, Minya, Egypt
- Pharmaceutical Engineering and 3D Printing (PharmE3D) Lab, Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Nada M Mohamed
- Pharmaceutical Chemistry Department, Modern University for Technology and Information (MTI), Cairo, Egypt
| | - Eman Zekry Attia
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, 61519, Egypt
| | - Mamdouh Nabil Samy
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, 61519, Egypt
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, 61519, Egypt.
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone, New Minia City, 61111, Egypt.
| | - Mostafa A Fouad
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, 61519, Egypt
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2
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Hong LL, Ding YF, Zhang W, Lin HW. Chemical and biological diversity of new natural products from marine sponges: a review (2009-2018). MARINE LIFE SCIENCE & TECHNOLOGY 2022; 4:356-372. [PMID: 37073163 PMCID: PMC10077299 DOI: 10.1007/s42995-022-00132-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 05/02/2022] [Indexed: 05/03/2023]
Abstract
Marine sponges are productive sources of bioactive secondary metabolites with over 200 new compounds isolated each year, contributing 23% of approved marine drugs so far. This review describes statistical research, structural diversity, and pharmacological activity of sponge derived new natural products from 2009 to 2018. Approximately 2762 new metabolites have been reported from 180 genera of sponges this decade, of which the main structural types are alkaloids and terpenoids, accounting for 50% of the total. More than half of new molecules showed biological activities including cytotoxic, antibacterial, antifungal, antiviral, anti-inflammatory, antioxidant, enzyme inhibition, and antimalarial activities. As summarized in this review, macrolides and peptides had higher proportions of new bioactive compounds in new compounds than other chemical classes. Every chemical class displayed cytotoxicity as the dominant activity. Alkaloids were the major contributors to antibacterial, antifungal, and antioxidant activities while steroids were primarily responsible for pest resistance activity. Alkaloids, terpenoids, and steroids displayed the most diverse biological activities. The statistic research of new compounds by published year, chemical class, sponge taxonomy, and biological activity are presented. Structural novelty and significant bioactivities of some representative compounds are highlighted. Marine sponges are rich sources of novel bioactive compounds and serve as animal hosts for microorganisms, highlighting the undisputed potential of sponges in the marine drugs research and development. Supplementary Information The online version contains supplementary material available at 10.1007/s42995-022-00132-3.
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Affiliation(s)
- Li-Li Hong
- Research Center for Marine Drugs, State Key Laboratory of Oncogenes and Related Genes, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127 China
| | - Ya-Fang Ding
- Research Center for Marine Drugs, State Key Laboratory of Oncogenes and Related Genes, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127 China
- School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, 316000 China
| | - Wei Zhang
- Centre for Marine Bioproducts Development, Flinders University, Adelaide, SA 5042 Australia
| | - Hou-Wen Lin
- Research Center for Marine Drugs, State Key Laboratory of Oncogenes and Related Genes, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127 China
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3
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El-Desoky AHH, Tsukamoto S. Marine natural products that inhibit osteoclastogenesis and promote osteoblast differentiation. J Nat Med 2022; 76:575-583. [PMID: 35397769 PMCID: PMC9165232 DOI: 10.1007/s11418-022-01622-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 03/15/2022] [Indexed: 10/25/2022]
Abstract
Osteoporosis is a disease that affects the quality of life of elderly people. The balance between bone formation mediated by osteoblasts and bone resorption by osteoclasts is important to maintain the normal bone condition. Therefore, the promotion of osteoblast differentiation and the suppression of osteoclastogenesis are effective strategies for osteoporosis treatment. Marine organisms are a promising source of biologically active and structurally diverse secondary metabolites, and have been providing drug leads for the treatment of numerous diseases. We describe the marine-derived secondary metabolites that can inhibit receptor activator of nuclear factor-κB ligand (RANKL)-induced osteoclastogenesis and promote osteoblast differentiation.
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Affiliation(s)
- Ahmed H H El-Desoky
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, 862-0973, Japan
- Pharmaceutical Industries Research Division, Pharmacognosy Department, National Research Centre, 33 El Bohouth St. (Former El Tahrir St.), Dokki, P.O. 12622, Giza, Egypt
| | - Sachiko Tsukamoto
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, 862-0973, Japan.
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4
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Caso A, da Silva FB, Esposito G, Teta R, Sala GD, Cavalcanti LPAN, Valverde AL, Martins RCC, Costantino V. Exploring Chemical Diversity of Phorbas Sponges as a Source of Novel Lead Compounds in Drug Discovery. Mar Drugs 2021; 19:667. [PMID: 34940666 PMCID: PMC8708981 DOI: 10.3390/md19120667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/23/2021] [Accepted: 11/23/2021] [Indexed: 12/30/2022] Open
Abstract
Porifera, commonly referred to as marine sponges, are acknowledged as major producers of marine natural products (MNPs). Sponges of the genus Phorbas have attracted much attention over the years. They are widespread in all continents, and several structurally unique compounds have been identified from this species. Terpenes, mainly sesterterpenoids, are the major secondary metabolites isolated from Phorbas species, even though several alkaloids and steroids have also been reported. Many of these compounds have presented interesting biological activities. Particularly, Phorbas sponges have been demonstrated to be a source of cytotoxic metabolites. In addition, MNPs exhibiting cytostatic, antimicrobial, and anti-inflammatory activities have been isolated and structurally characterized. This review provides an overview of almost 130 secondary metabolites from Phorbas sponges and their biological activities, and it covers the literature since the first study published in 1993 until November 2021, including approximately 60 records. The synthetic routes to the most interesting compounds are briefly outlined.
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Affiliation(s)
- Alessia Caso
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano, 49, 80131 Naples, Italy; (A.C.); (G.E.); (R.T.)
| | - Fernanda Barbosa da Silva
- Instituto de Química de Produtos Naturais Walter Mors, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, Rio de Janeiro 21941-599, Brazil; (F.B.d.S.); (L.P.A.N.C.); (R.C.C.M.)
| | - Germana Esposito
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano, 49, 80131 Naples, Italy; (A.C.); (G.E.); (R.T.)
| | - Roberta Teta
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano, 49, 80131 Naples, Italy; (A.C.); (G.E.); (R.T.)
| | - Gerardo Della Sala
- Department of Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80125 Naples, Italy;
| | - Laura P. A. Nunes Cavalcanti
- Instituto de Química de Produtos Naturais Walter Mors, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, Rio de Janeiro 21941-599, Brazil; (F.B.d.S.); (L.P.A.N.C.); (R.C.C.M.)
| | - Alessandra Leda Valverde
- Departamento de Química Orgânica, Instituto de Química, Universidade Federal Fluminense, Outeiro de São João Batista s/n, Niterói, Rio de Janeiro 24020-141, Brazil;
| | - Roberto Carlos C. Martins
- Instituto de Química de Produtos Naturais Walter Mors, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, 373, Rio de Janeiro 21941-599, Brazil; (F.B.d.S.); (L.P.A.N.C.); (R.C.C.M.)
| | - Valeria Costantino
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano, 49, 80131 Naples, Italy; (A.C.); (G.E.); (R.T.)
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5
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Amewu RK, Sakyi PO, Osei-Safo D, Addae-Mensah I. Synthetic and Naturally Occurring Heterocyclic Anticancer Compounds with Multiple Biological Targets. Molecules 2021; 26:7134. [PMID: 34885716 PMCID: PMC8658833 DOI: 10.3390/molecules26237134] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/21/2021] [Accepted: 11/22/2021] [Indexed: 01/09/2023] Open
Abstract
Cancer is a complex group of diseases initiated by abnormal cell division with the potential of spreading to other parts of the body. The advancement in the discoveries of omics and bio- and cheminformatics has led to the identification of drugs inhibiting putative targets including vascular endothelial growth factor (VEGF) family receptors, fibroblast growth factors (FGF), platelet derived growth factors (PDGF), epidermal growth factor (EGF), thymidine phosphorylase (TP), and neuropeptide Y4 (NY4), amongst others. Drug resistance, systemic toxicity, and drug ineffectiveness for various cancer chemo-treatments are widespread. Due to this, efficient therapeutic agents targeting two or more of the putative targets in different cancer cells are proposed as cutting edge treatments. Heterocyclic compounds, both synthetic and natural products, have, however, contributed immensely to chemotherapeutics for treatments of various diseases, but little is known about such compounds and their multimodal anticancer properties. A compendium of heterocyclic synthetic and natural product multitarget anticancer compounds, their IC50, and biological targets of inhibition are therefore presented in this review.
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Affiliation(s)
- Richard Kwamla Amewu
- Department of Chemistry, School of Physical and Mathematical Sciences, College of Basic and Applied Sciences, University of Ghana, Legon, Accra P.O. Box LG 56, Ghana; (R.K.A.); (P.O.S.); (D.O.-S.)
| | - Patrick Opare Sakyi
- Department of Chemistry, School of Physical and Mathematical Sciences, College of Basic and Applied Sciences, University of Ghana, Legon, Accra P.O. Box LG 56, Ghana; (R.K.A.); (P.O.S.); (D.O.-S.)
- Department of Chemical Sciences, School of Sciences, University of Energy and Natural Resources, Sunyani P.O. Box 214, Ghana
| | - Dorcas Osei-Safo
- Department of Chemistry, School of Physical and Mathematical Sciences, College of Basic and Applied Sciences, University of Ghana, Legon, Accra P.O. Box LG 56, Ghana; (R.K.A.); (P.O.S.); (D.O.-S.)
| | - Ivan Addae-Mensah
- Department of Chemistry, School of Physical and Mathematical Sciences, College of Basic and Applied Sciences, University of Ghana, Legon, Accra P.O. Box LG 56, Ghana; (R.K.A.); (P.O.S.); (D.O.-S.)
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6
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Francis P, Chakraborty K. Clathriketal, a new tricyclic spiroketal compound from marine sponge Clathria prolifera attenuates serine exopeptidase dipeptidyl peptidase-IV. Nat Prod Res 2021; 36:3069-3077. [PMID: 34315292 DOI: 10.1080/14786419.2021.1956491] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
An undescribed tricyclic spiroketal compound clathriketal was purified from the solvent extract of the Microcionidae sponge Clathria prolifera, and was characterised as 7-(hydroxymethyl)-13-methoxy-3,11-dimethyl-4-oxo-octahydrospiro[chromene-9,13-pyran]-11-yl propionate by spectroscopic experiments. Clathriketal exhibited significant anti-hyperglycemic property by attenuating serine protease dipeptidyl peptidase-IV (IC50 0.37 mM), and its activity was comparable with the standard diprotin A (IC50 0.31 mM). The spiroketal also exhibited significant inhibitory potentials against carbolytic enzymes α-glucosidase (IC50 0.43 mM) and α-amylase (IC50 0.41 mM). Superior antioxidant properties of clathriketal against the oxidants, 2, 2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid and 2, 2-diphenyl-1-picrylhydrazyl (IC50 ∼1.2 mM) also reinforced its promising anti-hyperglycemic activity. Considerably greater topological surface area (91.29) coupled with lesser steric parameters of clathriketal, as elucidated from the structure-activity relationship analyses could further ascribe the improved ligand-receptor interactions resulting in its prospective anti-hyperglycemic activity. Molecular docking analysis of clathriketal with dipeptidyl peptidase-IV recorded lesser binding energy (-9.63 kcal/mol), which further corroborated its prospective antihyperglycemic activity.
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Affiliation(s)
- Prima Francis
- Central Marine Fisheries Research Institute, Cochin, Kerala, India.,Department of Chemistry, Mangalore University, Mangalagangothri, Karnataka State, India
| | - Kajal Chakraborty
- Central Marine Fisheries Research Institute, Cochin, Kerala, India.,Department of Chemistry, Mangalore University, Mangalagangothri, Karnataka State, India
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7
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Antibiofilm Activity of Phorbaketals from the Marine Sponge Phorbas sp. against Staphylococcus aureus. Mar Drugs 2021; 19:md19060301. [PMID: 34073814 PMCID: PMC8225198 DOI: 10.3390/md19060301] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 05/20/2021] [Accepted: 05/21/2021] [Indexed: 01/02/2023] Open
Abstract
Biofilm formation by Staphylococcus aureus plays a critical role in the persistence of chronic infections due to its tolerance against antimicrobial agents. Here, we investigated the antibiofilm efficacy of six phorbaketals: phorbaketal A (1), phorbaketal A acetate (2), phorbaketal B (3), phorbaketal B acetate (4), phorbaketal C (5), and phorbaketal C acetate (6), isolated from the Korean marine sponge Phorbas sp. Of these six compounds, 3 and 5 were found to be effective inhibitors of biofilm formation by two S. aureus strains, which included a methicillin-resistant S. aureus. In addition, 3 also inhibited the production of staphyloxanthin, which protects microbes from reactive oxygen species generated by neutrophils and macrophages. Transcriptional analyses showed that 3 and 5 inhibited the expression of the biofilm-related hemolysin gene hla and the nuclease gene nuc1.
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8
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Elgoud Said AA, Mahmoud BK, Attia EZ, Abdelmohsen UR, Fouad MA. Bioactive natural products from marine sponges belonging to family Hymedesmiidae. RSC Adv 2021; 11:16179-16191. [PMID: 35479127 PMCID: PMC9031984 DOI: 10.1039/d1ra00228g] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 03/26/2021] [Indexed: 12/23/2022] Open
Abstract
Natural products of marine origin exhibit extensive biological activities, and display a vital role in the exploration of new compounds for drug development. Marine sponges have been reported at the top with respect to the discovery of biologically active metabolites that have potential pharmaceutical applications. The family Hymedesmiidae belonging to the Demospongiae class includes ten accepted genera, of which four genera were explored for their bioactive metabolites, namely Phorbas, Hamigera, Hemimycale, and Kirkpatrickia. Genus Phorbas has received more attention due to the isolation of various classes of compounds with unique structures mainly diterpenes, alkaloids, sesterterpenes, and steroids that exhibited diverse biological activities including: antiviral, antimicrobial, and anti-inflammatory, whereas anticancer compounds predominated. This review focuses on the isolated secondary metabolites from family Hymedesmiidae with their biological potential and covers the literature from 1989 to 2020. Natural products of marine origin exhibit extensive biological activities, and display a vital role in the exploration of new compounds for drug development.![]()
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Affiliation(s)
- Asmaa Abo Elgoud Said
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University 61519 Minia Egypt +2-86-2369075 +2-86-2347759
| | - Basma Khalaf Mahmoud
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University 61519 Minia Egypt +2-86-2369075 +2-86-2347759
| | - Eman Zekry Attia
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University 61519 Minia Egypt +2-86-2369075 +2-86-2347759
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University 61519 Minia Egypt +2-86-2369075 +2-86-2347759.,Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone 61111 New Minia City Egypt
| | - Mostafa Ahmed Fouad
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University 61519 Minia Egypt +2-86-2369075 +2-86-2347759
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9
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Integrated analytical workflow for chromatographic profiling and metabolite annotation of a cytotoxic Phorbas amaranthus extract. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1174:122720. [PMID: 33957353 DOI: 10.1016/j.jchromb.2021.122720] [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: 01/31/2021] [Revised: 04/09/2021] [Accepted: 04/12/2021] [Indexed: 11/22/2022]
Abstract
Phorbas is a widely studied genus of marine sponge and produce structurally rich cytotoxic metabolites. Still, only few studies have assessed metabolites present in Brazilian species. To circumvent redundancy, in this work, we applied and herein report the use of a scouting liquid chromatographic system associate to the design of experiment produced by the DryLab® software to obtain a fast and efficient chromatographic separation of the active hexane fraction, further enabling untargeted high-resolution mass spectrometry (HRMS) data. To this end, a crude hydroalcoholic extract of the sponge Phorbas amaranthus collected in Brazilian coast was prepared and partitioned. The cytotoxicity of the crude extract and the fractions was evaluated using tumor cell culture models. Fragmentation pathways assembled from HRMS data allowed the annotation of 18 known Phorbas metabolites, while 17 metabolites were inferred based on Global Natural Product Social Molecular Networking (GNPS), matching with a further 29 metabolites annotated through molecular subnetwork. The workflow employed demonstrates that chromatographic method development can be accelerated by the use of automated scouting systems and DryLab®, which is useful for profiling natural product libraries, as well as data curation by molecular clusters and should be incorporated to the tools of natural product chemists.
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10
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Chakraborty K, Francis P. Callypyrones from marine Callyspongiidae sponge Callyspongia diffusa: antihypertensive bis- γ-pyrone polypropionates attenuate angiotensin-converting enzyme. Nat Prod Res 2020; 35:5801-5812. [PMID: 33131327 DOI: 10.1080/14786419.2020.1837819] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Angiotensin I-converting enzyme (ACE) catalyses the biosynthesis of angiotensin II, a potent blood vessel constrictor, from angiotensin I, and ACE inhibitors were recognised as medications for hypertension. Undescribed bis-γ-pyrone polypropionate compounds, callypyrones A and B were purified from the organic extract of Callyspongiidae sponge species Callyspongia diffusa by repeated chromatographic purification. Callypyrone A exhibited significantly greater attenuation potential against ACE (IC50 0.48 mM) than that displayed by callypyrone B (IC50 0.57 mM) and showed comparable activity with standard ACE inhibitor captopril (IC50 0.36 mM). Higher electronic parameters of callypyrone A (topological surface area of 108.36) combined with balanced hydrophilic-lipophilic parameter (octanol-water coefficient, log Pow 1.9), as deduced from the structure-activity relationship analyses, could further indicate the improved ligand-receptor interactions resulting in its prospective ACE inhibitory activity. In silico docking analyses of the callypyrones with ACE recorded lowest binding energy (-12.58 kcal mol-1) for callypyrone A, which further supported the antihypertensive potential of the compound.
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Affiliation(s)
| | - Prima Francis
- Central Marine Fisheries Research Institute, Cochin, Kerala, India.,Department of Chemistry, Mangalore University, Mangalagangothri, Karnataka, India
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11
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Lee J, Kim J, Lee HY. Au(I)-Catalyzed Cyclization of Epoxyalkynes to Allylic Alcohol Containing Spiroketals and Application to the Total Synthesis of (-)-Alotaketal A. Org Lett 2020; 22:4073-4077. [PMID: 32391700 DOI: 10.1021/acs.orglett.0c01130] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A gold-catalyzed tandem spiroketalization of epoxyalkynes accompanied by epoxide rearrangement into the corresponding allylic alcohol was developed for the construction of functionalized spiroketals. This new synthetic methodology for unsaturated spiroketals warranted a facile total synthesis of alotaketal A from carvone via a corresponding epoxyalkyne precursor.
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Affiliation(s)
- Jaeyeon Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Dajeon 34141, Republic of Korea
| | - Jiheon Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Dajeon 34141, Republic of Korea
| | - Hee-Yoon Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Dajeon 34141, Republic of Korea
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12
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Yao H, Zhou N, Zhang Z, Guan W, Wang H, Cheng H. Recent developments in syntheses of alotaketals and phorbaketals. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151480] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Huang XM, Yang ZJ, Xie Q, Zhang ZK, Zhang H, Ma JY. Natural products for treating colorectal cancer: A mechanistic review. Biomed Pharmacother 2019; 117:109142. [DOI: 10.1016/j.biopha.2019.109142] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 06/14/2019] [Accepted: 06/14/2019] [Indexed: 12/17/2022] Open
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14
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Shirley HJ, Bray CD. A biomimetic approach towards phorone sesterterpenoids. Org Biomol Chem 2019; 17:6985-6988. [PMID: 31290533 DOI: 10.1039/c9ob00745h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report an investigation towards a unified total synthesis of the Korean sponge derived sesterterpenoids, phorones A (1) and B (2), via a biomimetic strategy. This work has established a new synthetic strategy to the parent ansellane sesterterpenoid skeleton with unanticipated diversion to a biogenetically related pathway.
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Affiliation(s)
- Harry J Shirley
- The School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK.
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15
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Shirley HJ, Jamieson ML, Brimble MA, Bray CD. A new family of sesterterpenoids isolated around the Pacific Rim. Nat Prod Rep 2019; 35:210-219. [PMID: 29547216 DOI: 10.1039/c7np00049a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Covering: 2009 up to the end of 2017 There has been a recent eruption in the number of known marine sesterterpenoids which have been isolated from Pacific Rim marine organisms. These compounds have novel and unusual structures that exhibit incredibly potent and varied bioactivities. This review details the isolation, biological testing and prospects for this exciting new family with discussion of their potential biogenetic origins.
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Affiliation(s)
- Harry J Shirley
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK
| | - Megan L Jamieson
- School of Chemical Sciences, The University of Auckland, 23 Symonds St, Auckland 1010, New Zealand.
| | - Margaret A Brimble
- School of Chemical Sciences, The University of Auckland, 23 Symonds St, Auckland 1010, New Zealand.
| | - Christopher D Bray
- Department of Chemistry, Queen Mary University of London, Mile End Road, London, E1 4NS, UK.
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16
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Li Z, Hong LL, Gu BB, Sun YT, Wang J, Liu JT, Lin HW. Natural Products from Sponges. SYMBIOTIC MICROBIOMES OF CORAL REEFS SPONGES AND CORALS 2019. [PMCID: PMC7122408 DOI: 10.1007/978-94-024-1612-1_15] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The sponge is one of the oldest multicellular invertebrates in the world. Marine sponges represent one of the extant metazoans of 700–800 million years. They are classified in four major classes: Calcarea, Demospongiae, Hexactinellida, and Homoscleromorpha. Among them, three genera, namely, Haliclona, Petrosia, and Discodemia have been identified to be the richest source of biologically active compounds. So far, 15,000 species have been described, and among them, more than 6000 species are found in marine and freshwater systems throughout tropical, temperate, and polar regions. More than 5000 different compounds have been isolated and structurally characterized to date, contributing to about 30% of all marine natural products. The chemical diversity of sponge products is high with compounds classified as alkaloids, terpenoids, peptides, polyketides, steroids, and macrolides, which integrate a wide range of biological activities, including antibacterial, anticancer, antifungal, anti-HIV, anti-inflammatory, and antimalarial. There is an open debate whether all natural products isolated from sponges are produced by sponges or are in fact derived from microorganisms that are inhaled though filter-feeding or that live within the sponges. Apart from their origin and chemoecological functions, sponge-derived metabolites are also of considerable interest in drug development. Therefore, development of recombinant microorganisms engineered for efficient production of sponge-derived products is a promising strategy that deserves further attention in future investigations in order to address the limitations regarding sustainable supply of marine drugs.
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Affiliation(s)
- Zhiyong Li
- Marine Biotechnology Laboratory, State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
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Sengupta S, Mehta G. Natural products as modulators of the cyclic-AMP pathway: evaluation and synthesis of lead compounds. Org Biomol Chem 2019; 16:6372-6390. [PMID: 30140804 DOI: 10.1039/c8ob01388h] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
It is now well recognized that the normal cellular response in mammalian cells is critically regulated by the cyclic-AMP (cAMP) pathway through the appropriate balance of adenylyl cyclase (AC) and phosphodiesterase-4 (PDE4) activities. Dysfunctions in the cAMP pathway have major implications in various diseases like CNS disorders, inflammation and cardiac syndromes and, hence, the modulation of cAMP signalling through appropriate intervention of AC/PDE4 activities has emerged as a promising new drug discovery strategy of current interest. In this context, synthetic small molecules have had limited success so far and therefore parallel efforts on natural product leads have been actively pursued. The early promise of using the diterpene forskolin and its semi-synthetic analogs as AC activators has given way to new leads in the last decade from novel natural products like the marine sesterterpenoids alotaketals and ansellones and the 9,9'-diarylfluorenone cored selaginpulvilins, etc. and their synthesis has drawn much attention. This review captures these contemporary developments, particularly total synthesis campaigns and structure-guided analog design in the context of AC and PDE-4 modulating attributes and the scope for future possibilities.
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Affiliation(s)
- Saumitra Sengupta
- School of Chemistry, University of Hyderabad, Gachibowli, Hyderabad - 5000 046, Telengana, India.
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Anticancer Activity of Gukulenin A Isolated from the Marine Sponge Phorbas gukhulensis In Vitro and In Vivo. Mar Drugs 2019; 17:md17020126. [PMID: 30795557 PMCID: PMC6410303 DOI: 10.3390/md17020126] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 02/16/2019] [Accepted: 02/18/2019] [Indexed: 01/07/2023] Open
Abstract
Gukulenin A is a bis-tropolone tetraterpenoid isolated from the marine sponge Phorbas gukhulensis. In this study, we examined the anticancer activities of gukulenin A in ovarian cancer cell lines (A2780, SKOV3, OVCAR-3, and TOV-21G) and in an ovarian cancer mouse model generated by injecting A2780 cells. We found that gukulenin A suppressed tumor growth in A2780-bearing mice. Gukulenin A markedly inhibited cell viability in four ovarian cancer cell lines, including the A2780 cell line. Gukulenin A treatment increased the fraction of cells accumulated at the sub G1 phase in a dose-dependent manner and the population of annexin V-positive cells, suggesting that gukulenin A induces apoptotic cell death in ovarian cancer cells. In addition, gukulenin A triggered the activation of caspase-3, -8, and -9, and caspase inhibitors attenuated gukulenin A-induced A2780 cell death. The results suggest that gukulenin A may be a potential therapeutic agent for ovarian cancer.
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Abstract
Total syntheses of biologically and structurally fascinating sesterterpenoids published between Jan. 2012 and Jan. 2018 are summarized and discussed here.
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Affiliation(s)
- Yuye Chen
- State Key Laboratory of Quality Research in Chinese Medicine
- Institute of Chinese Medical Sciences
- University of Macau
- China
- Department of Chemistry and Shenzhen Grubbs Institute
| | - Jing Zhao
- State Key Laboratory of Quality Research in Chinese Medicine
- Institute of Chinese Medical Sciences
- University of Macau
- China
| | - Shaoping Li
- State Key Laboratory of Quality Research in Chinese Medicine
- Institute of Chinese Medical Sciences
- University of Macau
- China
| | - Jing Xu
- Department of Chemistry and Shenzhen Grubbs Institute
- Southern University of Science and Technology
- Shenzhen
- China
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20
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Sesterterpenoid and Steroid Metabolites from a Deep-Water Alaska Sponge Inhibit Wnt/β-Catenin Signaling in Colon Cancer Cells. Mar Drugs 2018; 16:md16090297. [PMID: 30150508 PMCID: PMC6164309 DOI: 10.3390/md16090297] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 08/01/2018] [Accepted: 08/23/2018] [Indexed: 01/22/2023] Open
Abstract
The Wnt/β-catenin signaling pathway is known to play critical roles in a wide range of cellular processes: cell proliferation, differentiation, migration and embryonic development. Importantly, dysregulation of this pathway is tightly associated with pathogenesis in most human cancers. Therefore, the Wnt/β-catenin pathway has emerged as a promising target in anticancer drug screening programs. In the present study, we have isolated three previously unreported metabolites from an undescribed sponge, a species of Monanchora (Order Poecilosclerida, Family Crambidae), closely related to the northeastern Pacific species Monanchora pulchra, collected from deep waters off the Aleutian Islands of Alaska. Through an assortment of NMR, MS, ECD, computational chemical shifts calculation, and DP4, chemical structures of these metabolites have been characterized as spirocyclic ring-containing sesterterpenoid (1) and cholestane-type steroidal analogues (2 and 3). These compounds exhibited the inhibition of β-catenin response transcription (CRT) through the promotion of β-catenin degradation, which was in part implicated in the antiproliferative activity against two CRT-positive colon cancer cell lines.
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21
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Xia Y, Wang LJ, Wang J, Chen S, Shen Y, Guo CH, Liang YM. Palladium-Catalyzed Construction of Tetracyclic Scaffolds via the 1,7-Enyne Carbocyclization/Iodophenol Dearomatization Cascade. J Org Chem 2017; 82:12386-12394. [DOI: 10.1021/acs.joc.7b02196] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yu Xia
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Li-Jing Wang
- College of Chemistry & Environmental Science, HeBei University, 180 Wusi Donglu, Baoding 071002, People’s Republic of China
| | - Jia Wang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Si Chen
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Yi Shen
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Chun-Huan Guo
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Yong-Min Liang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
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22
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Nong XH, Wei XY, Qi SH. Pteridic acids C–G spirocyclic polyketides from the marine-derived Streptomyces sp. SCSGAA 0027. J Antibiot (Tokyo) 2017; 70:1047-1052. [DOI: 10.1038/ja.2017.105] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 08/02/2017] [Accepted: 08/06/2017] [Indexed: 11/09/2022]
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Affiliation(s)
- Seewon Joung
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
| | - Rira Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
| | - Hee-Yoon Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
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24
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Cheng H, Zhang Z, Yao H, Zhang W, Yu J, Tong R. Unified Asymmetric Total Syntheses of (−)-Alotaketals A-D and (−)-Phorbaketal A. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704628] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hang Cheng
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Zhihong Zhang
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Hongliang Yao
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Wei Zhang
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Jingxun Yu
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Rongbiao Tong
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
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Cheng H, Zhang Z, Yao H, Zhang W, Yu J, Tong R. Unified Asymmetric Total Syntheses of (−)-Alotaketals A-D and (−)-Phorbaketal A. Angew Chem Int Ed Engl 2017; 56:9096-9100. [DOI: 10.1002/anie.201704628] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Hang Cheng
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Zhihong Zhang
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Hongliang Yao
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Wei Zhang
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Jingxun Yu
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Rongbiao Tong
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
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Wang M, Tietjen I, Chen M, Williams DE, Daoust J, Brockman MA, Andersen RJ. Sesterterpenoids Isolated from the Sponge Phorbas sp. Activate Latent HIV-1 Provirus Expression. J Org Chem 2016; 81:11324-11334. [DOI: 10.1021/acs.joc.6b02312] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Meng Wang
- Departments of Chemistry and Earth, Oceans & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Ian Tietjen
- Faculty
of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
| | - Min Chen
- Departments of Chemistry and Earth, Oceans & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - David E. Williams
- Departments of Chemistry and Earth, Oceans & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Julie Daoust
- Departments of Chemistry and Earth, Oceans & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Mark A. Brockman
- Faculty
of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
- British
Columbia Centre for Excellence in HIV/AIDS, St. Paul’s Hospital, Vancouver, British Columbia, Canada V6Z 1Y6
- Department
of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
| | - Raymond J. Andersen
- Departments of Chemistry and Earth, Oceans & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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Shirley HJ, Bray CD. Spiroketal Formation by Cascade Oxidative Dearomatization: An Approach to the Phorbaketal Skeleton. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501370] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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28
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Seo YJ, Lee KT, Rho JR, Choi JH. Phorbaketal A, Isolated from the Marine Sponge Phorbas sp., Exerts Its Anti-Inflammatory Effects via NF-κB Inhibition and Heme Oxygenase-1 Activation in Lipopolysaccharide-Stimulated Macrophages. Mar Drugs 2015; 13:7005-19. [PMID: 26610528 PMCID: PMC4663563 DOI: 10.3390/md13117005] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 11/13/2015] [Indexed: 12/19/2022] Open
Abstract
Marine sponges harbor a range of biologically active compounds. Phorbaketal A is a tricyclic sesterterpenoid isolated from the marine sponge Phorbas sp.; however, little is known about its biological activities and associated molecular mechanisms. In this study, we examined the anti-inflammatory effects and underlying molecular mechanism of phorbaketal A in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages. We found that phorbaketal A significantly inhibited the LPS-induced production of nitric oxide (NO), but not prostaglandin E2, in RAW 264.7 cells. Further, phorbaketal A suppressed the expression of inducible NO synthase at both the mRNA and protein levels. In addition, phorbaketal A reduced the LPS-induced production of inflammatory cytokines such as tumor necrosis factor-alpha, interleukin (IL)-1beta, IL-6, and monocyte chemotactic protein-1. Treatment with phorbaketal A inhibited the transcriptional activity of nuclear factor-kappaB (NF-κB), a crucial signaling molecule in inflammation. Moreover, phorbaketal A up-regulated the expression of heme oxygenase-1 (HO-1) in LPS-stimulated RAW 264.7 cells. These data suggest that phorbaketal A, isolated from the marine sponge Phorbas sp., inhibits the production of inflammatory mediators via down-regulation of the NF-κB pathway and up-regulation of the HO-1 pathway.
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Affiliation(s)
- Yun-Ji Seo
- Department of Life & Nanopharmaceutical Sciences, Kyung Hee University, Seoul 130-701, Korea.
- College of Pharmacy, Kyung Hee University, Seoul 130-701, Korea.
| | - Kyung-Tae Lee
- Department of Life & Nanopharmaceutical Sciences, Kyung Hee University, Seoul 130-701, Korea.
| | - Jung-Rae Rho
- Department of Marine Biotechnology, Kunsan National University, Jeonbuk 573-701, Korea.
| | - Jung-Hye Choi
- Department of Life & Nanopharmaceutical Sciences, Kyung Hee University, Seoul 130-701, Korea.
- College of Pharmacy, Kyung Hee University, Seoul 130-701, Korea.
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29
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Lee K, Rho JR. A new sesterterpenoid showing anti-inflammatory effect from the Marine Sponge Haliclona species. JOURNAL OF THE KOREAN MAGNETIC RESONANCE SOCIETY 2015. [DOI: 10.6564/jkmrs.2015.19.1.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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30
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Woo JK, Kim CK, Ahn CH, Oh DC, Oh KB, Shin J. Additional sesterterpenes and a nortriterpene saponin from the sponge Clathria gombawuiensis. JOURNAL OF NATURAL PRODUCTS 2015; 78:218-224. [PMID: 25634623 DOI: 10.1021/np500753q] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Three new terpene metabolites (1-3) were isolated from the marine sponge Clathria gombawuiensis collected from Korean waters. On the basis of the results of combined spectroscopic analyses, the structures of phorone B (1) and ansellone C (2) were determined to be the sesterterpenes of the phorone and ansellone classes, respectively, whereas the saponin gombaside A (3) was a nortriterpene sodium O-sulfonato-glucuronide of the rare 4,4,14-trimethylpregnane class. The absolute configuration of the glucuronate of 3 was assigned by an application of the phenylglycine methyl ester (PGME) method. The new compounds exhibited moderate cytotoxicity against A549 and K562 cell lines, and compound 3 showed antibacterial activity. The cytotoxicity of 1 may be related to the presence of a free phenolic -OH group, as the corresponding O-methoxy derivative 4 is inactive.
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Affiliation(s)
- Jung-Kyun Woo
- Natural Products Research Institute, College of Pharmacy, Seoul National University , San 56-1, Sillim, Gwanak, Seoul 151-742, Korea
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31
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Hubert JG, Furkert DP, Brimble MA. Synthesis of the Spirocyclic Framework of Sesterterpenoid Natural Products. J Org Chem 2015; 80:2715-23. [DOI: 10.1021/jo502897u] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Jonathan G. Hubert
- School of Chemical Sciences
and Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
| | - Daniel. P. Furkert
- School of Chemical Sciences
and Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
| | - Margaret A. Brimble
- School of Chemical Sciences
and Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
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32
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Hubert JG, Furkert DP, Brimble MA. Preparation of cis-γ-Hydroxycarvone Derivatives for Synthesis of Sesterterpenoid Natural Products: Total Synthesis of Phorbin A. J Org Chem 2015; 80:2231-9. [DOI: 10.1021/jo502748s] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jonathan G. Hubert
- School of Chemical Sciences and Maurice Wilkins Centre for Molecular
Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
| | - Daniel. P. Furkert
- School of Chemical Sciences and Maurice Wilkins Centre for Molecular
Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
| | - Margaret A. Brimble
- School of Chemical Sciences and Maurice Wilkins Centre for Molecular
Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
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Paioti PHS, Ketcham JM, Aponick A. Controlling Regiochemistry in the Gold-Catalyzed Synthesis of Unsaturated Spiroketals. Org Lett 2014; 16:5320-3. [DOI: 10.1021/ol5024954] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Paulo H. S. Paioti
- Department
of Chemistry,
Center for Heterocyclic Compounds, University of Florida, Gainesville, Florida 32611, United States
| | - John M. Ketcham
- Department
of Chemistry,
Center for Heterocyclic Compounds, University of Florida, Gainesville, Florida 32611, United States
| | - Aaron Aponick
- Department
of Chemistry,
Center for Heterocyclic Compounds, University of Florida, Gainesville, Florida 32611, United States
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Lee Y, Wang W, Kim H, Giri AG, Won DH, Hahn D, Baek KR, Lee J, Yang I, Choi H, Nam SJ, Kang H. Phorbaketals L–N, cytotoxic sesterterpenoids isolated from the marine sponge of the genus Phorbas. Bioorg Med Chem Lett 2014; 24:4095-8. [DOI: 10.1016/j.bmcl.2014.07.066] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 07/10/2014] [Accepted: 07/23/2014] [Indexed: 10/25/2022]
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Woo JK, Kim CK, Kim SH, Kim H, Oh DC, Oh KB, Shin J. Gombaspiroketals A–C, Sesterterpenes from the Sponge Clathria gombawuiensis. Org Lett 2014; 16:2826-9. [DOI: 10.1021/ol500868s] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Jung-Kyun Woo
- Natural
Products Research Institute, College of Pharmacy, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-742, Korea
| | - Chang-Kwon Kim
- Natural
Products Research Institute, College of Pharmacy, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-742, Korea
| | - Seong-Hwan Kim
- Natural
Products Research Institute, College of Pharmacy, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-742, Korea
| | - Heegyu Kim
- Department of Agricultural Biotechnology, College of Agriculture & Life Science, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-921, Korea
| | - Dong-Chan Oh
- Natural
Products Research Institute, College of Pharmacy, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-742, Korea
| | - Ki-Bong Oh
- Department of Agricultural Biotechnology, College of Agriculture & Life Science, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-921, Korea
| | - Jongheon Shin
- Natural
Products Research Institute, College of Pharmacy, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-742, Korea
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Liu WZ, Ma LY, Liu DS, Huang YL, Wang CH, Shi SS, Pan XH, Song XD, Zhu RX. Peniciketals A–C, New Spiroketals from Saline Soil Derived Penicillium raistrichii. Org Lett 2013; 16:90-3. [DOI: 10.1021/ol403076s] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Wei-Zhong Liu
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Li-Ying Ma
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - De-Sheng Liu
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Yu-Ling Huang
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Chun-Hua Wang
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Shou-Sen Shi
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Xiao-Hong Pan
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Xiao-Dong Song
- Pharmacy of College, Binzhou Medical College, Yantai 264003, People’s Republic of China
| | - Rong-Xiu Zhu
- Institute of
Theoretical Chemistry, School
of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People’s Republic of China
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Lin X, Ji S, Qiao X, Hu H, Chen N, Dong Y, Huang Y, Guo D, Tu P, Ye M. Density functional theory calculations in stereochemical determination of terpecurcumins J-W, cytotoxic terpene-conjugated curcuminoids from Curcuma longa L. J Org Chem 2013; 78:11835-48. [PMID: 24219305 DOI: 10.1021/jo401859u] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Fourteen novel terpene-conjugated curcuminoids, terpecurcumins J-W (1-14), have been isolated from the rhizomes of Curcuma longa L. Among them, terpecurcumins J-Q and V represent four unprecedented skeletons featuring an unusual core of hydrobenzannulated[6,6]-spiroketal (1 and 2), bicyclo[2.2.2]octene (3-7), bicyclo[3.1.3]octene (8), and spiroepoxide (13), respectively. The structures of compounds 1-14 were elucidated by extensive spectroscopic analysis, and their absolute configurations were established by electronic circular dichroism, vibrational circular dichroism, and (13)C NMR spectroscopic data analysis, together with density functional theory calculations. The structure and configuration of 1 was further confirmed by single-crystal X-ray diffraction (Cu Kα). The biogenetic pathways of 1-14 were proposed, involving Michael addition, condensation, Diels-Alder cycloaddition, and electrophilic substitution reactions. Terpecurcumins showed more potent cytotoxic activities than curcumin and ar-/β-turmerone. Among them, terpecurcumin Q (8) exhibited IC50 of 3.9 μM against MCF-7 human breast cancer cells, and mitochondria-mediated apoptosis played an important role in the overall growth inhibition. Finally, LC/MS/MS quantitative analysis of five representative terpecurcumins indicated these novel compounds were present in C. longa at parts per million level.
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Affiliation(s)
- Xionghao Lin
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , 38 Xueyuan Road, Beijing 100191, China
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Phorbaketal A inhibits adipogenic differentiation through the suppression of PPARγ-mediated gene transcription by TAZ. Eur J Pharmacol 2013; 718:181-7. [DOI: 10.1016/j.ejphar.2013.08.035] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 08/21/2013] [Accepted: 08/30/2013] [Indexed: 01/30/2023]
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Jeon JE, Liao L, Kim H, Sim CJ, Oh DC, Oh KB, Shin J. Cytotoxic diterpenoid pseudodimers from the Korean sponge Phorbas gukhulensis. JOURNAL OF NATURAL PRODUCTS 2013; 76:1679-1685. [PMID: 24025124 DOI: 10.1021/np400389c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Four new cytotoxic diterpenoid pseudodimers (2-5), along with a previously reported one, gukulenin A (1), were isolated from the marine sponge Phorbas gukhulensis collected off the coast of Gagu-do, Korea. These novel compounds, designated gukulenins C-F (2-5), were determined by extensive spectroscopic analyses to be pseudodimers of the gagunins, like gukulenin A. The termini of the tropolone-containing side chains in gukulenins C-E (2-4) were found to have diverse modifications involving acetamides or taurine, whereas gukulenin F (5) was formed from 1 by the ring-opening of a cyclic hemiketal. The relative and absolute configurations were assigned by Murata's and modified Snatzke's methods using a HETLOC experiment and a CD measurement of a dimolybdenum complex, respectively. All of these compounds exhibited significant cytotoxicity against the K562 and A549 cell lines.
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Affiliation(s)
- Ju-eun Jeon
- Natural Products Research Institute, College of Pharmacy, Seoul National University , San 56-1, Sillim, Gwanak, Seoul 151-742, Korea
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Daoust J, Chen M, Wang M, Williams DE, Garcia Chavez MA, Wang YA, Merchant CE, Fontana A, Kieffer TJ, Andersen RJ. Sesterterpenoids isolated from a northeastern Pacific Phorbas sp. J Org Chem 2013; 78:8267-73. [PMID: 23941043 DOI: 10.1021/jo4014589] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Four new sesterterpenoids, ansellone B (4), phorbadione (5), secoepoxyansellone A (6), and alotaketal C (7), have been isolated from specimens of the sponge Phorbas sp. collected in British Columbia. Ansellone B (4) has an unprecedented heterocyclic skeleton featuring an oxocane ring, and secoepoxyansellone A (6) is the first example of the degraded "secoansellane" sesterterpenoid carbon skeleton. Alotaketal C (7) is an activator of cAMP signaling in HEK cells.
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Affiliation(s)
- Julie Daoust
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
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41
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Lin Z, Torres JP, Ammon MA, Marett L, Teichert RW, Reilly CA, Kwan JC, Hughen RW, Flores M, Tianero MD, Peraud O, Cox JE, Light AR, Villaraza AJL, Haygood MG, Concepcion GP, Olivera BM, Schmidt EW. A bacterial source for mollusk pyrone polyketides. ACTA ACUST UNITED AC 2013; 20:73-81. [PMID: 23352141 DOI: 10.1016/j.chembiol.2012.10.019] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 10/11/2012] [Accepted: 10/24/2012] [Indexed: 12/29/2022]
Abstract
In the oceans, secondary metabolites often protect otherwise poorly defended invertebrates, such as shell-less mollusks, from predation. The origins of these metabolites are largely unknown, but many of them are thought to be made by symbiotic bacteria. In contrast, mollusks with thick shells and toxic venoms are thought to lack these secondary metabolites because of reduced defensive needs. Here, we show that heavily defended cone snails also occasionally contain abundant secondary metabolites, γ-pyrones known as nocapyrones, which are synthesized by symbiotic bacteria. The bacteria, Nocardiopsis alba CR167, are related to widespread actinomycetes that we propose to be casual symbionts of invertebrates on land and in the sea. The natural roles of nocapyrones are unknown, but they are active in neurological assays, revealing that mollusks with external shells are an overlooked source of secondary metabolite diversity.
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Affiliation(s)
- Zhenjian Lin
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, UT 84112, USA
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42
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Xiao Z, Huang H, Shao C, Xia X, Ma L, Huang X, Lu Y, Lin Y, Long Y, She Z. Asperterpenols A and B, New Sesterterpenoids Isolated from a Mangrove Endophytic Fungus Aspergillus sp. 085242. Org Lett 2013; 15:2522-5. [PMID: 23642191 DOI: 10.1021/ol401005j] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Ze’en Xiao
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China, and School of Chemistry and Environment, South China Normal University, 348 West Outer Ring Road, Guangzhou 510006, China
| | - Huarong Huang
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China, and School of Chemistry and Environment, South China Normal University, 348 West Outer Ring Road, Guangzhou 510006, China
| | - Changlun Shao
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China, and School of Chemistry and Environment, South China Normal University, 348 West Outer Ring Road, Guangzhou 510006, China
| | - Xuekui Xia
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China, and School of Chemistry and Environment, South China Normal University, 348 West Outer Ring Road, Guangzhou 510006, China
| | - Lin Ma
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China, and School of Chemistry and Environment, South China Normal University, 348 West Outer Ring Road, Guangzhou 510006, China
| | - Xishan Huang
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China, and School of Chemistry and Environment, South China Normal University, 348 West Outer Ring Road, Guangzhou 510006, China
| | - Yongjun Lu
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China, and School of Chemistry and Environment, South China Normal University, 348 West Outer Ring Road, Guangzhou 510006, China
| | - Yongcheng Lin
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China, and School of Chemistry and Environment, South China Normal University, 348 West Outer Ring Road, Guangzhou 510006, China
| | - Yuhua Long
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China, and School of Chemistry and Environment, South China Normal University, 348 West Outer Ring Road, Guangzhou 510006, China
| | - Zhigang She
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China, and School of Chemistry and Environment, South China Normal University, 348 West Outer Ring Road, Guangzhou 510006, China
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43
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Huang J, Yang JR, Zhang J, Yang J. Total synthesis and structure-activity relationship study of the potent cAMP signaling agonist (-)-alotaketal A. Org Biomol Chem 2013; 11:3212-22. [PMID: 23584129 DOI: 10.1039/c3ob40120k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A detailed account of the first total synthesis of alotaketal A, a tricyclic spiroketal sesterterpenoid that potently activates the cAMP signaling pathway, is provided. The synthesis employs both intra- and intermolecular reductive allylation of esters for assembling one of the fragments and their coupling. A Hg(OAc)2-mediated allylic mercuration is used to introduce the C22-hydroxyl group. The subtle influence of substituents over the course of the spiroketalization process is revealed. The synthesis confirms the relative and absolute stereochemistry of (-)-alotaketal A and allows verification of alotaketal A's effect over cAMP signaling using reporter-based FRET imaging assays with HEK 293T cells. Our studies also revealed alotaketal A's unique activity in selectively targeting nuclear PKA signaling in living cells.
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Affiliation(s)
- Jinhua Huang
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
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Wang W, Mun B, Lee Y, Venkat Reddy M, Park Y, Lee J, Kim H, Hahn D, Chin J, Ekins M, Nam SJ, Kang H. Bioactive sesterterpenoids from a Korean sponge Monanchora sp. JOURNAL OF NATURAL PRODUCTS 2013; 76:170-177. [PMID: 23360104 DOI: 10.1021/np300573m] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Chemical investigation of a Korean marine sponge, Monanchora sp., yielded nine new sesterterpenoids (1-9) along with phorbaketals A-C (10-12). The planar structures were established on the basis of NMR and MS analysis, and the absolute configurations of 1-9 were defined using the modified Mosher's method and CD spectroscopic data analysis. Compounds 1-8, designated as phorbaketals D-K, possess a spiroketal-modified benzopyran moiety such as phorbaketal A, and their structural variations are due to oxidation and/or reduction of the tricyclic core or the side chain. Compound 9, designated as phorbin A, has a monocyclic structure and is proposed to be a possible biogenetic precursor of the phorbaketals. Compounds 1-9 were evaluated for cytotoxicity against four human cancer cell lines (A498, ACHN, MIA-paca, and PANC-1), and a few of them were found to exhibit cytotoxic activity.
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Affiliation(s)
- Weihong Wang
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, Seoul National University, Seoul, Korea
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Huang X, Huang H, Li H, Sun X, Huang H, Lu Y, Lin Y, Long Y, She Z. Asperterpenoid A, a New Sesterterpenoid as an Inhibitor of Mycobacterium tuberculosis Protein Tyrosine Phosphatase B from the Culture of Aspergillus sp. 16-5c. Org Lett 2013; 15:721-3. [DOI: 10.1021/ol303549c] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Xishan Huang
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Hongbo Huang
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Hanxiang Li
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Xuefeng Sun
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Huarong Huang
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Yongjun Lu
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Yongcheng Lin
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Yuhua Long
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Zhigang She
- School of Chemistry and Chemical Engineering and School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
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46
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47
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48
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Affiliation(s)
- Mengyang Xuan
- University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Ian Paterson
- University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Stephen M. Dalby
- University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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49
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Wang W, Lee Y, Lee TG, Mun B, Giri AG, Lee J, Kim H, Hahn D, Yang I, Chin J, Choi H, Nam SJ, Kang H. Phorone A and Isophorbasone A, Sesterterpenoids Isolated from the Marine Sponge Phorbas sp. Org Lett 2012; 14:4486-9. [DOI: 10.1021/ol3019874] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Weihong Wang
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, and Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, and College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon 540-950, Korea
| | - Yehee Lee
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, and Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, and College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon 540-950, Korea
| | - Tae Gu Lee
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, and Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, and College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon 540-950, Korea
| | - Bora Mun
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, and Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, and College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon 540-950, Korea
| | - Awadut G. Giri
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, and Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, and College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon 540-950, Korea
| | - Jihye Lee
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, and Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, and College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon 540-950, Korea
| | - Hiyoung Kim
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, and Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, and College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon 540-950, Korea
| | - Dongyup Hahn
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, and Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, and College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon 540-950, Korea
| | - Inho Yang
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, and Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, and College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon 540-950, Korea
| | - Jungwook Chin
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, and Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, and College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon 540-950, Korea
| | - Hyukjae Choi
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, and Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, and College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon 540-950, Korea
| | - Sang-Jip Nam
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, and Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, and College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon 540-950, Korea
| | - Heonjoong Kang
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, and Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, and College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon 540-950, Korea
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50
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Huang J, Yang JR, Zhang J, Yang J. Total synthesis of the potent cAMP signaling agonist (-)-alotaketal A. J Am Chem Soc 2012; 134:8806-9. [PMID: 22563931 DOI: 10.1021/ja303529z] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have developed a convergent synthetic route to the potent cAMP signaling agonist (-)-alotaketal A that employs two stages of SmI(2)-mediated reductive allylation reactions for assembling the polycycle and fragment coupling. Also notable are a Hg(OAc)(2)-mediated selective alkene oxidation and the subtlety of the formation of the unprecedented spiroketal ring system. The probes AKAR4 and ICUE3 were used to evaluate the cAMP singaling agonistic activity of (-)-alotaketal A and elucidate its structure-activity relationship.
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Affiliation(s)
- Jinhua Huang
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
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