1
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Escobar EE, Yang W, Lanzillotti MB, Juetten KJ, Shields S, Siegel D, Zhang YJ, Brodbelt JS. Tracking Inhibition of Human Small C-Terminal Domain Phosphatase 1 Using 193 nm Ultraviolet Photodissociation Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024; 35:1330-1341. [PMID: 38662915 DOI: 10.1021/jasms.4c00098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
Working in tandem with kinases via a dynamic interplay of phosphorylation and dephosphorylation of proteins, phosphatases regulate many cellular processes and thus represent compelling therapeutic targets. Here we leverage ultraviolet photodissociation to shed light on the binding characteristics of two covalent phosphatase inhibitors, T65 and rabeprazole, and their respective interactions with the human small C-terminal domain phosphatase 1 (SCP1) and its single-point mutant C181A, in which a nonreactive alanine replaces one key reactive cysteine. Top-down MS/MS analysis is used to localize the binding of T65 and rabeprazole on the two proteins and estimate the relative reactivities of each cysteine residue.
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Affiliation(s)
| | | | | | | | | | - Dionicio Siegel
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, 9500 Gilman Drive 0741, La Jolla, California 92093, United States
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2
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Chen Y, Sewsurn S, Amand S, Kunz C, Pietrancosta N, Calabro K, Buisson D, Mann S. Metabolic Investigation and Auxiliary Enzyme Modelization of the Pyrrocidine Pathway Allow Rationalization of Paracyclophane-Decahydrofluorene Formation. ACS Chem Biol 2024; 19:886-895. [PMID: 38576157 DOI: 10.1021/acschembio.3c00684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
Fungal paracyclophane-decahydrofluorene-containing natural products are complex polycyclic metabolites derived from similar hybrid PKS-NRPS pathways. Herein we studied the biosynthesis of pyrrocidines, one representative of this family, by gene inactivation in the producer Sarocladium zeae coupled to thorough metabolic analysis and molecular modeling of key enzymes. We characterized nine pyrrocidines and analogues as well as in mutants a variety of accumulating metabolites with new structures including rare cis-decalin, cytochalasan, and fused 6/15/5 macrocycles. This diversity highlights the extraordinary plasticity of the pyrrocidine biosynthetic gene cluster. From accumulating metabolites, we delineated the scenario of pyrrocidine biosynthesis. The ring A of the decahydrofluorene is installed by PrcB, a membrane-bound cyclizing isomerase, on a PKS-NRPS-derived pyrrolidone precursor. Docking experiments in PrcB allowed us to characterize the active site suggesting a mechanism triggered by arginine-mediated deprotonation at the terminal methyl of the substrate. Next, two integral membrane proteins, PrcD and PrcE, each predicted as a four-helix bundle, perform hydroxylation of the pyrrolidone ring and paracyclophane formation, respectively. Modelization of PrcE highlights a topological homology with vitamin K oxido-reductase and the presence of a disulfide bond. Our results suggest a previously unsuspected coupling mechanism via a transient loss of aromaticity of tyrosine residue to form the strained paracyclophane motif. Finally, the lipocalin-like protein PrcX drives the exo-cycloaddition yielding ring B and C of the decahydrofluorene to afford pyrrocidine A, which is transformed by a reductase PrcI to form pyrrocidine B. These insights will greatly facilitate the microbial production of pyrrocidine analogues by synthetic biology.
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Affiliation(s)
- Youwei Chen
- Laboratoire Molécules de Communication et Adaptation des Micro-organismes UMR 7245, Muséum National d'Histoire Naturelle, CNRS, Sorbonne Universités; CP54, 57 rue Cuvier, 75005 Paris, France
| | - Steffi Sewsurn
- Laboratoire Molécules de Communication et Adaptation des Micro-organismes UMR 7245, Muséum National d'Histoire Naturelle, CNRS, Sorbonne Universités; CP54, 57 rue Cuvier, 75005 Paris, France
| | - Séverine Amand
- Laboratoire Molécules de Communication et Adaptation des Micro-organismes UMR 7245, Muséum National d'Histoire Naturelle, CNRS, Sorbonne Universités; CP54, 57 rue Cuvier, 75005 Paris, France
| | - Caroline Kunz
- Laboratoire Molécules de Communication et Adaptation des Micro-organismes UMR 7245, Muséum National d'Histoire Naturelle, CNRS, Sorbonne Universités; CP54, 57 rue Cuvier, 75005 Paris, France
- Sorbonne Université, Faculté des Sciences et Ingénierie, UFR 927, F-75005 Paris, France
| | - Nicolas Pietrancosta
- Laboratoire des Biomolécules, LBM, Sorbonne Université, École Normale Supérieure, PSL University, CNRS, F-75005 Paris, France
- Neurosciences Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), Sorbonne Université, INSERM, CNRS, F-75005 Paris, France
| | - Kevin Calabro
- Laboratoire Molécules de Communication et Adaptation des Micro-organismes UMR 7245, Muséum National d'Histoire Naturelle, CNRS, Sorbonne Universités; CP54, 57 rue Cuvier, 75005 Paris, France
| | - Didier Buisson
- Laboratoire Molécules de Communication et Adaptation des Micro-organismes UMR 7245, Muséum National d'Histoire Naturelle, CNRS, Sorbonne Universités; CP54, 57 rue Cuvier, 75005 Paris, France
| | - Stéphane Mann
- Laboratoire Molécules de Communication et Adaptation des Micro-organismes UMR 7245, Muséum National d'Histoire Naturelle, CNRS, Sorbonne Universités; CP54, 57 rue Cuvier, 75005 Paris, France
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3
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Huang Y, Yan H, Zhang B, Zhu G, Yu J, Xiao X, He W, Chen Y, Gao X, She Z, Li M, Yuan J. Ascomylactam C Induces an Immunogenic Cell Death Signature via Mitochondria-Associated ER Stress in Lung Cancer and Melanoma. Mar Drugs 2023; 21:600. [PMID: 38132921 PMCID: PMC10744434 DOI: 10.3390/md21120600] [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: 10/20/2023] [Revised: 11/20/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023] Open
Abstract
Ascomylactam C (AsC) is a new 13-membered-ring macrocyclic alkaloid, which was first isolated and identified in 2019 from the secondary metabolites of the mangrove endophytic fungus Didymella sp. CYSK-4 in the South China Sea. AsC has been found to have a broad-spectrum cytotoxic activity. However, the antitumor effects in vivo and mechanisms of AsC remain unclear. The aim of this study was to describe the effects of AsC on lung cancer and melanoma cells and to explore the antitumor molecular mechanism of AsC. In vitro, we used plate colony formation experiments and demonstrated the ability of AsC to inhibit low-density tumor growth. An Annexin V/PI cell apoptosis detection experiment revealed that AsC induced tumor cell apoptosis. In vivo, AsC suppressed the tumor growth of LLC and B16F10 allograft significantly in mice, and promoted the infiltration of CD4+ T and CD8+ T cells in tumor tissues. Mechanistically, by analyses of Western blotting, immunofluorescence and ELISA analysis, we found that AsC increased ROS formation, induced endoplasmic reticulum (ER) stress, activated the protein kinase RNA-like ER kinase (PERK)/eukaryotic translation initiation factor (eIF2α)/activating transcription factor 4 (ATF4)/C/EBP homologous protein (CHOP) signaling pathway, and induced immunogenic cell death (ICD) of tumor cells. Our results suggest that AsC may be a potentially promising antitumor drug candidate.
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Affiliation(s)
- Yun Huang
- School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China; (Y.H.); (H.Y.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China; (G.Z.); (J.Y.); (X.X.)
| | - Hongmei Yan
- School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China; (Y.H.); (H.Y.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China; (G.Z.); (J.Y.); (X.X.)
| | - Bingzhi Zhang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China; (B.Z.); (X.G.)
| | - Ge Zhu
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China; (G.Z.); (J.Y.); (X.X.)
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Jianchen Yu
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China; (G.Z.); (J.Y.); (X.X.)
| | - Xuhan Xiao
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China; (G.Z.); (J.Y.); (X.X.)
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Wenxuan He
- School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou 510006, China;
| | - Yan Chen
- Department of Traditional Chinese Medicine, School of Pharmacy, Anhui Medical University, Hefei 230032, China;
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China;
| | - Xiaoxia Gao
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China; (B.Z.); (X.G.)
| | - Zhigang She
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China;
| | - Mengfeng Li
- School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China; (Y.H.); (H.Y.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China; (G.Z.); (J.Y.); (X.X.)
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Jie Yuan
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China; (G.Z.); (J.Y.); (X.X.)
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
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4
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Huang Y, Huang Y, Zhu G, Zhang B, Zhu Y, Chen B, Gao X, Yuan J. A Meroterpenoid from Tibetan Medicine Induces Lung Cancer Cells Apoptosis through ROS-Mediated Inactivation of the AKT Pathway. Molecules 2023; 28:molecules28041939. [PMID: 36838927 PMCID: PMC9963024 DOI: 10.3390/molecules28041939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/09/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023] Open
Abstract
As a traditional Tibetan medicine in China, Meconopsis grandis Prain has been used to treat a variety of illnesses by local people for thousands of years. However, the active ingredients contained in Meconopsis grandis Prain and its pharmacodynamic mechanisms have scarcely been reported. We isolated a meroterpenoid named D1399 from Meconopsis grandis Prain endophytic fungi with strong antitumor activity. The structure analysis showed that D1399 is an alkaloid containing a 13-membered macrocyclic structure. The IC50 of D1399 for human lung cancer cells' viability ranged from 0.88 to 2.45 μM. Furthermore, we utilized TUNEL assay and western blotting to investigate the antitumor effectiveness of D1399. The results have shown that D1399 induced the apoptosis of lung cancer cells on the extrinsic and intrinsic pathways by boosting ROS generation and repressing AKT activity. In the mouse xenograft model, the average tumor weight with 30 mg·kg-1 D1399 treatment exhibited 73.19% inhibition compared with the untreated control, without affecting body weight loss. Above all, for the first time, our study provides a possible mechanism for the antitumor activity of D1399 in vitro and in vivo as a natural product from Tibetan medicine with Meconopsis grandis Prain, which may be a potentially promising antitumor drug candidate.
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Affiliation(s)
- Yi Huang
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Yun Huang
- School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Ge Zhu
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
| | - Bingzhi Zhang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Yujia Zhu
- School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
| | - Bin Chen
- Southern Laboratory of Ocean Science and Engineering, Zhuhai 519000, China
- Correspondence: (B.C.); (X.G.); (J.Y.)
| | - Xiaoxia Gao
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
- Correspondence: (B.C.); (X.G.); (J.Y.)
| | - Jie Yuan
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
- Correspondence: (B.C.); (X.G.); (J.Y.)
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5
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Conrado R, Gomes TC, Roque GSC, De Souza AO. Overview of Bioactive Fungal Secondary Metabolites: Cytotoxic and Antimicrobial Compounds. Antibiotics (Basel) 2022; 11:1604. [PMID: 36421247 PMCID: PMC9687038 DOI: 10.3390/antibiotics11111604] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/07/2022] [Accepted: 11/08/2022] [Indexed: 08/27/2023] Open
Abstract
Microorganisms are known as important sources of natural compounds that have been studied and applied for different purposes in distinct areas. Specifically, in the pharmaceutical area, fungi have been explored mainly as sources of antibiotics, antiviral, anti-inflammatory, enzyme inhibitors, hypercholesteremic, antineoplastic/antitumor, immunomodulators, and immunosuppressants agents. However, historically, the high demand for new antimicrobial and antitumor agents has not been sufficiently attended by the drug discovery process, highlighting the relevance of intensifying studies to reach sustainable employment of the huge world biodiversity, including the microorganisms. Therefore, this review describes the main approaches and tools applied in the search for bioactive secondary metabolites, as well as presents several examples of compounds produced by different fungi species with proven pharmacological effects and additional examples of fungal cytotoxic and antimicrobial molecules. The review does not cover all fungal secondary metabolites already described; however, it presents some reports that can be useful at any phase of the drug discovery process, mainly for pharmaceutical applications.
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Affiliation(s)
| | | | | | - Ana Olívia De Souza
- Development and Innovation Laboratory, Instituto Butantan, Avenida Vital Brasil, 1500, São Paulo 05503-900, SP, Brazil
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6
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Kairytė K, Grybaitė B, Vaickelionienė R, Sapijanskaitė-Banevič B, Kavaliauskas P, Mickevičius V. Synthesis and Biological Activity Characterization of Novel 5-Oxopyrrolidine Derivatives with Promising Anticancer and Antimicrobial Activity. Pharmaceuticals (Basel) 2022; 15:ph15080970. [PMID: 36015119 PMCID: PMC9415606 DOI: 10.3390/ph15080970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 08/01/2022] [Accepted: 08/03/2022] [Indexed: 11/16/2022] Open
Abstract
The 1-(4-acetamidophenyl)-5-oxopyrrolidine carboxylic acid was applied for synthesizing derivatives bearing azole, diazole, and hydrazone moieties in the molecule. Modification of an acetamide fragment to the free amino group afforded compounds with two functional groups, which enabled to provide a series of 4-substituted-1-(4-substituted phenyl)pyrrolidine-2-ones. The resulted compounds 2 and 4-22 were subjected to the in vitro anticancer and antimicrobial activity determination. The compounds 18-22 exerted the most potent anticancer activity against A549 cells. Furthermore, compound 21 bearing 5-nitrothiophene substituents demonstrated promising and selective antimicrobial activity against multidrug-resistant Staphylococcus aureus strains, including linezolid and tedizolid-resistant S. aureus. These results demonstrate that 5-oxopyrolidine derivatives are attractive scaffolds for the further development of anticancer and antimicrobial compounds targeting multidrug-resistant Gram-positive pathogens.
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Affiliation(s)
- Karolina Kairytė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų Rd. 19, LT-50254 Kaunas, Lithuania
| | - Birutė Grybaitė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų Rd. 19, LT-50254 Kaunas, Lithuania
| | - Rita Vaickelionienė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų Rd. 19, LT-50254 Kaunas, Lithuania
| | | | - Povilas Kavaliauskas
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų Rd. 19, LT-50254 Kaunas, Lithuania
- Transplantation-Oncology Infectious Diseases Program, Division of Infectious Diseases, Department of Medicine, Weill Cornell Medicine of Cornell University, 527 East 68th Street, New York, NY 10065, USA
- Department of Microbiology and Immunology, University of Maryland Baltimore School of Medicine, 655 W. Baltimore Street, Baltimore, MD 21201, USA
- Biological Research Center, Veterinary Academy, Lithuanian University of Health Sciences, Tilžės St. 18, LT-47181 Kaunas, Lithuania
- Institute of Infectious Diseases and Pathogenic Microbiology, Birštono Str. 38A, LT-59116 Prienai, Lithuania
- Correspondence:
| | - Vytautas Mickevičius
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų Rd. 19, LT-50254 Kaunas, Lithuania
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7
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Svenningsen EB, Ottosen RN, Jørgensen KH, Nisavic M, Larsen CK, Hansen BK, Wang Y, Lindorff-Larsen K, Tørring T, Hacker SM, Palmfeldt J, Poulsen TB. The covalent reactivity of functionalized 5-hydroxy-butyrolactams is the basis for targeting of fatty acid binding protein 5 (FABP5) by the neurotrophic agent MT-21. RSC Chem Biol 2022; 3:1216-1229. [PMID: 36320884 PMCID: PMC9533406 DOI: 10.1039/d2cb00161f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 09/02/2022] [Indexed: 11/21/2022] Open
Abstract
Covalently acting compounds experience a strong interest within chemical biology both as molecular probes in studies of fundamental biological mechanisms and/or as novel drug candidates. In this context, the identification of new classes of reactive groups is particularly important as these can expose novel reactivity modes and, consequently, expand the ligandable proteome. Here, we investigated the electrophilic reactivity of the 3-acyl-5-hydroxy-1,5-dihydro-2H-pyrrole-2-one (AHPO) scaffold, a heterocyclic motif that is e.g. present in various bioactive natural products. Our investigations were focused on the compound MT-21 – a simplified structural analogue of the natural product epolactaene – which is known to have both neurotrophic activity and ability to trigger apoptotic cell death. We found that the central N-acyl hemiaminal group of MT-21 can function as an electrophilic centre enabling divergent reactivity with both amine- and thiol-based nucleophiles, which furthermore translated to reactivity with proteins in both cell lysates and live cells. We found that in live cells MT-21 strongly engaged the lipid transport protein fatty acid-binding protein 5 (FABP5) by direct binding to a cysteine residue in the bottom of the ligand binding pocket. Through preparation of a series of MT-21 derivatives, we probed the specificity of this interaction which was found to be strongly dependent on subtle structural changes. Our study suggests that MT-21 may be employed as a tool compound in future studies of the biology of FABP5, which remains incompletely understood. Furthermore, our study has also made clear that other natural products containing the AHPO-motif may likewise possess covalent reactivity and that this property may underlie their biological activity. In this work, it is shown that an N-acyl hemiaminal motif present in many natural products can function as an electrophilic centre, mediating covalent reactivity in biological systems, reacting with both thiols and amines.![]()
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Affiliation(s)
| | - Rasmus N. Ottosen
- Department of Chemistry, Aarhus University, DK-8000, Aarhus C, Denmark
| | | | - Marija Nisavic
- Department of Chemistry, Aarhus University, DK-8000, Aarhus C, Denmark
- Department of Clinical Medicine – Research Unit for Molecular Medicine, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| | - Camilla K. Larsen
- Department of Engineering – Microbial Biosynthesis, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Bente K. Hansen
- Department of Chemistry, Aarhus University, DK-8000, Aarhus C, Denmark
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus C, Denmark
| | - Yong Wang
- Copenhagen Biocenter, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | | | - Thomas Tørring
- Department of Engineering – Microbial Biosynthesis, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Stephan M. Hacker
- Leiden Institute of Chemistry, Leiden University, NL-2333 CC Leiden, The Netherlands
| | - Johan Palmfeldt
- Department of Clinical Medicine – Research Unit for Molecular Medicine, Aarhus University Hospital, DK-8200 Aarhus N, Denmark
| | - Thomas B. Poulsen
- Department of Chemistry, Aarhus University, DK-8000, Aarhus C, Denmark
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8
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Xue D, Que Y, Shao H, He H, Zhao X, Gao S. Stereoselective Synthesis of the Core Structures of Pyrrocidines and Wortmannines through the Excited-State Nazarov Reactions. Org Lett 2021; 23:2736-2741. [PMID: 33760620 DOI: 10.1021/acs.orglett.1c00643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction conditions and scope of the excited-state Nazarov reaction of dicyclicvinyl ketones were studied. The stereochemistry of this electrocyclization is consistent with the mechanism of the pericyclic reaction and Woodward-Hoffmann rule. UV-light-promoted excited-state Nazarov reactions gave hydrofluorenones bearing a syn-cis configuration via a disrotatory cyclization. The core tricyclic hydrofluorenones of pyrrocidines and wortmannines were constructed via the excited-state Nazarov reactions, which demonstrated their synthetic potential in complex natural product total synthesis.
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Affiliation(s)
- Dongsheng Xue
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Yonglei Que
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Hao Shao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Xiaoli Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China.,Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
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9
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Vaishanv NK, Zaheer MK, Kumar S, Kant R, Mohanan K. Base-Mediated Intramolecular Cyclization of α-Nitroethylallenic Esters as a Synthetic Route to 5-Hydroxy-3-pyrrolin-2-ones. J Org Chem 2021; 86:5630-5638. [PMID: 33788567 DOI: 10.1021/acs.joc.1c00109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An unprecedented Cs2CO3-mediated intramolecular cyclization/rearrangement cascade that transforms α-nitroethylallenic esters to functionalized pyrrolin-2-ones has been uncovered. This reaction provides a new and practical approach for the synthesis of medicinally privileged 5-hydroxy-3-pyrrolin-2-ones under mild conditions. The broad potential of this new method was demonstrated by an efficient Au/Ag-catalyzed heteroarylation of 5-hydroxy-3-pyrrolin-2-ones employing electron-rich heteroarenes to furnish heteroaryl-lactam derivatives.
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Affiliation(s)
- Narendra Kumar Vaishanv
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India
| | - Mohd Khalid Zaheer
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India
| | - Sandeep Kumar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India
| | - Ruchir Kant
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India
| | - Kishor Mohanan
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India
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10
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Wang L, Huang Y, Huang CH, Yu JC, Zheng YC, Chen Y, She ZG, Yuan J. A Marine Alkaloid, Ascomylactam A, Suppresses Lung Tumorigenesis via Inducing Cell Cycle G1/S Arrest through ROS/Akt/Rb Pathway. Mar Drugs 2020; 18:md18100494. [PMID: 32992455 PMCID: PMC7599880 DOI: 10.3390/md18100494] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 09/18/2020] [Accepted: 09/24/2020] [Indexed: 02/07/2023] Open
Abstract
Ascomylactam A was reported for the first time as a new 13-membered-ring macrocyclic alkaloid in 2019 from the mangrove endophytic fungus Didymella sp. CYSK-4 from the South China Sea. The aim of our study was to delineate the effects of ascomylactam A (AsA) on lung cancer cells and explore the antitumor molecular mechanisms underlying of AsA. In vitro, AsA markedly inhibited the cell proliferation with half-maximal inhibitory concentration (IC50) values from 4 to 8 μM on six lung cancer cell lines, respectively. In vivo, AsA suppressed the tumor growth of A549, NCI-H460 and NCI-H1975 xenografts significantly in mice. Furthermore, by analyses of the soft agar colony formation, 5-ethynyl-20-deoxyuridine (EdU) assay, reactive oxygen species (ROS) imaging, flow cytometry and Western blotting, AsA demonstrated the ability to induce cell cycle arrest in G1 and G1/S phases by increasing ROS generation and decreasing of Akt activity. Conversely, ROS inhibitors and overexpression of Akt could decrease cell growth inhibition and cell cycle arrest induced by AsA. Therefore, we believe that AsA blocks the cell cycle via an ROS-dependent Akt/Cyclin D1/Rb signaling pathway, which consequently leads to the observed antitumor effect both in vitro and in vivo. Our results suggest a novel leading compound for antitumor drug development.
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Affiliation(s)
- Lan Wang
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; (L.W.); (Y.H.); (J.-c.Y.)
- Department of Pathogen Biology and Immunology, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou 510006, China;
| | - Yun Huang
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; (L.W.); (Y.H.); (J.-c.Y.)
- School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Cui-hong Huang
- School of Medicine & Health Care, Shunde Polytechnic, Shunde 528333, China;
| | - Jian-chen Yu
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; (L.W.); (Y.H.); (J.-c.Y.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
| | - Ying-chun Zheng
- Department of Pathogen Biology and Immunology, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou 510006, China;
| | - Yan Chen
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China;
| | - Zhi-gang She
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China;
- Correspondence: (Z.-g.S.); (J.Y.); Tel.: +86-20-84113356 (Z.-g.S.); +86-20-87330368 (J.Y.)
| | - Jie Yuan
- Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; (L.W.); (Y.H.); (J.-c.Y.)
- Key Laboratory of Tropical Disease Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
- Correspondence: (Z.-g.S.); (J.Y.); Tel.: +86-20-84113356 (Z.-g.S.); +86-20-87330368 (J.Y.)
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11
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Pyrrocidine, a molecular off switch for fumonisin biosynthesis. PLoS Pathog 2020; 16:e1008595. [PMID: 32628727 PMCID: PMC7377494 DOI: 10.1371/journal.ppat.1008595] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 07/23/2020] [Accepted: 05/04/2020] [Indexed: 12/24/2022] Open
Abstract
Sarocladium zeae is a fungal endophyte of maize and can be found co-inhabiting a single seed with Fusarium verticillioides, a major mycotoxigenic food safety threat. S. zeae produces pyrrocidines A and B that inhibit the growth of F. verticillioides and may limit its spread within the seed to locations lacking S. zeae. Although coinhabiting single seeds, the fungi are generally segregated in separate tissues. To understand F. verticillioides' protective physiological response to pyrrocidines we sequenced the F. verticillioides transcriptome upon exposure to purified pyrrocidine A or B at sub-inhibitory concentrations. Through this work we identified a F. verticillioides locus FvABC3 (FVEG_11089) encoding a transporter critical for resistance to pyrrocidine. We also identified FvZBD1 (FVEG_00314), a gene directly adjacent to the fumonisin biosynthetic gene cluster that was induced several thousand-fold in response to pyrrocidines. FvZBD1 is postulated to act as a genetic repressor of fumonisin production since deletion of the gene resulted in orders of magnitude increase in fumonisin. Further, pyrrocidine acts, likely through FvZBD1, to shut off fumonisin biosynthesis. This suggests that S. zeae is able to hack the secondary metabolic program of a competitor fungus, perhaps as preemptive self-protection, in this case impacting a mycotoxin of central concern for food safety.
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12
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Singh M, Ravichandiran V, Bharitkar YP, Hazra A. Natural Products Containing Olefinic Bond: Important Substrates for Semi-synthetic Modification Towards Value Addition. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824666200312125734] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
:
Semi-synthesis, the way of preparing novel bioactive molecules via modification
of compounds isolated from natural sources is very much useful nowadays in the drug discovery
process. The modification is based on the reaction of functional group(s) present in a
natural compound. Among the examples of functional group transformation, double bond
modification is also common in the literature. Several reactions like hydrogenation, cyclopropanation,
epoxidation, addition reaction (halogenations, hydroxylation), Michael addition,
Heck reaction, cycloaddition, dipolar cycloaddition, etc. are employed for this purpose.
In this review, we have tried to gather the reactions performed with several double bond
containing classes of natural products like diterpenes, xanthones, sesquiterpene exomethylene lactones, diaryl
heptanoids, steroidal lactones, triterpenoids, limonoids, and alkamides. Where available, the effects of transformations
on the biological activities of the molecules are also mentioned.
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Affiliation(s)
- Meenakshi Singh
- National Institute of Pharmaceutical Education and Research (NIPER), Chunilal Bhawan, 168 Maniktala Main Road, Kolkata - 700 054, India
| | - V. Ravichandiran
- National Institute of Pharmaceutical Education and Research (NIPER), Chunilal Bhawan, 168 Maniktala Main Road, Kolkata - 700 054, India
| | - Yogesh P. Bharitkar
- National Institute of Pharmaceutical Education and Research (NIPER), Chunilal Bhawan, 168 Maniktala Main Road, Kolkata - 700 054, India
| | - Abhijit Hazra
- National Institute of Pharmaceutical Education and Research (NIPER), Chunilal Bhawan, 168 Maniktala Main Road, Kolkata - 700 054, India
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13
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Ancheeva E, Daletos G, Proksch P. Bioactive Secondary Metabolites from Endophytic Fungi. Curr Med Chem 2020; 27:1836-1854. [DOI: 10.2174/0929867326666190916144709] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 08/15/2019] [Accepted: 09/06/2019] [Indexed: 11/22/2022]
Abstract
Background:
Endophytes represent a complex community of microorganisms colonizing
asymptomatically internal tissues of higher plants. Several reports have shown that endophytes enhance
the fitness of their host plants by direct production of bioactive secondary metabolites, which are involved
in protecting the host against herbivores and pathogenic microbes. In addition, it is increasingly
apparent that endophytes are able to biosynthesize medicinally important “phytochemicals”, originally
believed to be produced only by their host plants.
Objective:
The present review provides an overview of secondary metabolites from endophytic fungi
with pronounced biological activities covering the literature between 2010 and 2017. Special focus is
given on studies aiming at exploration of the mode of action of these metabolites towards the discovery
of leads from endophytic fungi. Moreover, this review critically evaluates the potential of endophytic
fungi as alternative sources of bioactive “plant metabolites”.
Results:
Over the past few years, several promising lead structures from endophytic fungi have been
described in the literature. In this review, 65 metabolites are outlined with pronounced biological activities,
primarily as antimicrobial and cytotoxic agents. Some of these metabolites have shown to be
highly selective or to possess novel mechanisms of action, which hold great promises as potential drug
candidates.
Conclusion:
Endophytes represent an inexhaustible reservoir of pharmacologically important compounds.
Moreover, endophytic fungi could be exploited for the sustainable production of bioactive
“plant metabolites” in the future. Towards this aim, further insights into the dynamic endophyte - host
plant interactions and origin of endophytic fungal genes would be of utmost importance.
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Affiliation(s)
- Elena Ancheeva
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich Heine University Düsseldorf, Universitätsstrasse 1, Düsseldorf 40225, Germany
| | - Georgios Daletos
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich Heine University Düsseldorf, Universitätsstrasse 1, Düsseldorf 40225, Germany
| | - Peter Proksch
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich Heine University Düsseldorf, Universitätsstrasse 1, Düsseldorf 40225, Germany
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14
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Ariantari NP, Ancheeva E, Frank M, Stuhldreier F, Meier D, Gröner Y, Reimche I, Teusch N, Wesselborg S, Müller WEG, Kalscheuer R, Liu Z, Proksch P. Didymellanosine, a new decahydrofluorene analogue, and ascolactone C from Didymella sp. IEA-3B.1, an endophyte of Terminalia catappa. RSC Adv 2020; 10:7232-7240. [PMID: 35493894 PMCID: PMC9049863 DOI: 10.1039/c9ra10685e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 02/11/2020] [Indexed: 01/13/2023] Open
Abstract
Didymellanosine (1), the first analogue of the decahydrofluorene-class of natural products bearing a 13-membered macrocyclic alkaloid conjugated with adenosine, and a new benzolactone derivative, ascolactone C (4) along with eight known compounds (2, 3, 5–10), were isolated from a solid rice fermentation of the endophytic fungus Didymella sp. IEA-3B.1 derived from the host plant Terminalia catappa. In addition, ascochitamine (11) was obtained when (NH4)2SO4 was added to rice medium and is reported here for the first time as a natural product. Didymellanosine (1) displayed strong activity against the murine lymphoma cell line L5178Y, Burkitt's lymphoma B cells (Ramos) and adult lymphoblastic leukemia T cells (Jurkat J16), with IC50 values of 2.0, 3.3 and 4.4 µM, respectively. When subjected to a NFκB inhibition assay, didymellanosine (1) moderately blocked NFκB activation in the triple-negative breast cancer cell line MDA-MB 231. In an antimicrobial assay, ascomylactam C (3) was the most active compound when tested against a panel of Gram-positive bacteria including drug-resistant strains with MICs of 3.1–6.3 µM, while 1 revealed weaker activity. Interestingly, both compounds were also found active against Gram-negative Acinetobacter baumannii with MICs of 3.1 µM, in the presence of a sublethal concentration (0.1 µM) of colistin. An unusual decahydrofluorene-class alkaloid from Didymella sp. exhibited NFκB inhibitory and antimicrobial activities.![]()
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15
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Uesugi S, Honmura Y, Nishiyama M, Kusakabe K, Tonouchi A, Yamashita T, Hashimoto M, Kimura KI. Identification of neomacrophorins isolated from Trichoderma sp. 1212-03 as proteasome inhibitors. Bioorg Med Chem 2019; 27:115161. [PMID: 31732281 DOI: 10.1016/j.bmc.2019.115161] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 10/07/2019] [Accepted: 10/09/2019] [Indexed: 01/12/2023]
Abstract
Neomacrophorins I-III (1-3) and X have previously been isolated from Trichoderma sp. 1212-03. Their mode of action against cancer cells and the mechanism of biosynthesis of the characteristic [4.4.3] propellane framework in neomacrophorin X have not been reported. The isolation and characterization of neomacrophorins IV (4), V (5), and VI (6) is reported. Epoxyquinones 1, 4, and 6 potently induced apoptotic cell death in human acute promyelocytic leukemia HL60 cells, while epoxysemiquinols 2, 3, and 5 showed weak activity. This indicates that the epoxyquinone moiety is crucial for apoptosis-inducing activities of neomacrophorins. We also found that neomacrophorins inhibit proteasome in vitro, and 1, 4, and 6 induced significant accumulation of ubiquitinated proteins in HL60 cells. These activities were completely suppressed by a nucleophile, N-acetyl-l-cysteine (NAC). The analysis of reaction mechanisms using LC-MS suggested that C2' and C7' of neomacrophorins could be Michael acceptors in the reaction with NAC methyl ester (NACM). These findings indicated that the electrophilic properties of neomacrophorins are responsible for both their potent biological effects and the biosynthesis of unique [4.4.3] propellane framework in neomacrophorin X.
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Affiliation(s)
- Shota Uesugi
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Iwate Biotechnology Research Center, Kitakami, Iwate 024-0003, Japan
| | - Yuna Honmura
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Mami Nishiyama
- Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Kazuaki Kusakabe
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Akio Tonouchi
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Tetsuro Yamashita
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Masaru Hashimoto
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan.
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16
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Chen Y, Liu Z, Huang Y, Liu L, He J, Wang L, Yuan J, She Z. Ascomylactams A-C, Cytotoxic 12- or 13-Membered-Ring Macrocyclic Alkaloids Isolated from the Mangrove Endophytic Fungus Didymella sp. CYSK-4, and Structure Revisions of Phomapyrrolidones A and C. JOURNAL OF NATURAL PRODUCTS 2019; 82:1752-1758. [PMID: 31251621 DOI: 10.1021/acs.jnatprod.8b00918] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Three new 12- or 13-membered-ring macrocyclic alkaloids, named ascomylactams A-C (1-3), along with the analogues phomapyrrolidone C (4) and phomapyrrolidone A (5) were isolated from the mangrove endophytic fungus Didymella sp. CYSK-4. Their structures were elucidated by analysis of extensive spectroscopic data and mass spectrometric data. The structures and absolute configurations of 1 and 2 were determined by single-crystal X-ray diffraction experiments, which represents the first crystal structures described for a (6/5/6/5) tetracyclic skeleton fused with a 12- or 13-membered-ring macrocyclic moiety. The configurations of phomapyrrolidone C (4) and phomapyrrolidone A (5) were revised by detailed analysis of the NMR data. In a cytotoxic assay, compounds 1 and 3 showed moderate cytotoxicity against MDA-MB-435, MDA-MB-231, SNB19, HCT116, NCI-H460, and PC-3 human cancer cell lines, with IC50 values in the range of 4.2-7.8 μM.
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Affiliation(s)
- Yan Chen
- School of Chemistry , Sun Yat-sen University , Guangzhou 510275 , People's Republic of China
- School of Marine Sciences, Sun Yat-sen University , South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center , Guangzhou 510006 , People's Republic of China
| | - Zhaoming Liu
- School of Chemistry , Sun Yat-sen University , Guangzhou 510275 , People's Republic of China
- Guangdong Institute of Microbiology , Guangzhou 510075 , People's Republic of China
| | - Yun Huang
- Department of Biochemistry, Zhongshan School of Medicine , Sun Yat-sen University , Guangzhou 510080 , People's Republic of China
- Department of Pathogen Biology and Immunology, School of Basic Courses , Guangdong Pharmaceutical University , Guangzhou 510006 , People's Republic of China
| | - Lan Liu
- School of Marine Sciences, Sun Yat-sen University , South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center , Guangzhou 510006 , People's Republic of China
| | - Jianguo He
- School of Marine Sciences, Sun Yat-sen University , South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center , Guangzhou 510006 , People's Republic of China
| | - Lan Wang
- Department of Pathogen Biology and Immunology, School of Basic Courses , Guangdong Pharmaceutical University , Guangzhou 510006 , People's Republic of China
| | - Jie Yuan
- Department of Biochemistry, Zhongshan School of Medicine , Sun Yat-sen University , Guangzhou 510080 , People's Republic of China
| | - Zhigang She
- School of Chemistry , Sun Yat-sen University , Guangzhou 510275 , People's Republic of China
- School of Marine Sciences, Sun Yat-sen University , South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center , Guangzhou 510006 , People's Republic of China
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17
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Studies of novel bioprobes isolated from rare natural sources using mutant yeasts. J Antibiot (Tokyo) 2019; 72:579-589. [DOI: 10.1038/s41429-019-0189-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 03/21/2019] [Accepted: 04/10/2019] [Indexed: 01/10/2023]
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18
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Pedra NS, Galdino KDCA, da Silva DS, Ramos PT, Bona NP, Soares MSP, Azambuja JH, Canuto KM, de Brito ES, Ribeiro PRV, Souza ASDQ, Cunico W, Stefanello FM, Spanevello RM, Braganhol E. Endophytic Fungus Isolated From Achyrocline satureioides Exhibits Selective Antiglioma Activity-The Role of Sch-642305. Front Oncol 2018; 8:476. [PMID: 30420941 PMCID: PMC6215846 DOI: 10.3389/fonc.2018.00476] [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: 03/26/2018] [Accepted: 10/08/2018] [Indexed: 12/13/2022] Open
Abstract
Glioblastoma is the most devastating primary brain tumor. Current treatment is palliative, making necessary the development of new therapeutic strategies to offer alternatives to patients. Therefore, endophytes represent an interesting source of natural metabolites with anticancer potential. These microorganisms reside in tissues of living plants and act to improve their growth. Evidence revealed that several medicinal plants are colonized by endophytic fungi producer of antitumor metabolites. Achyrocline satureioides is a Brazilian medicinal plant characterized by its properties against gastrointestinal disturbances, anticancer and antioxidant effects. However, there are no reports describing the endophytic composition of A. satureioides. The present study proposes the isolation of endophytic fungus from A. satureioides, extract preparation, phytochemical characterization and evaluation of its antiglioma potential. Our data showed that crude extracts of endophyte decreased glioma viability with IC50 values of 1.60-1.63 μg/mL to eDCM (dichloromethane extract) and 37.30-55.12 μg/mL to eEtAc (ethyl acetate extract), respectively. Crude extracts induced cell death by apoptosis with modulation of redox status. In order to bioprospect anticancer metabolites, endophytic fungus extracts were subjected to guided fractionation and purification yielded five fractions of each extract. Six of ten fractions showed selective antiproliferative activity against glioma cells, with IC50 values ranged from 0.95 to 131.3 μg/mL. F3DCM (from eDCM) and F3EtAc (from eEtAc) fractions promoted C6 glioma toxicity with IC50 of 1.0 and 27.05 μg/mL, respectively. F3EtAc fraction induced late apoptosis and arrest in G2/M stage, while F3DCM promoted apoptosis with arrest in Sub-G1 phase. Moreover, F3DCM increased antioxidant defense and decreased ROS production. Additionally, F3DCM showed no cytotoxic activity against astrocytes, revealing selective effect. Based on promising potential of F3DCM, we identified the production of Sch-642305, a lactone, which showed antiproliferative properties with IC50 values of 1.1 and 7.6 μg/mL to C6 and U138MG gliomas, respectively. Sch-642305 promoted arrest on cell cycle in G2/M inducing apoptosis. Furthermore, this lactone decreased glioma cell migration and modulated redox status, increasing superoxide dismutase and catalase activities and enhancing sulfhydryl content, consequently suppressing reactive species of oxygen generation. Taken together, these results indicate that metabolites produced by endophytic fungus isolated from A. satureioides have therapeutic potential as antiglioma agent.
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Affiliation(s)
- Nathalia Stark Pedra
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Kennia de Cássia Araújo Galdino
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Daniel Schuch da Silva
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Priscila Treptow Ramos
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Natália Pontes Bona
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Mayara Sandrielly Pereira Soares
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Juliana Hoffstater Azambuja
- Departamento de Ciências Básicas da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Brazil
| | | | | | | | | | - Wilson Cunico
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Francieli Moro Stefanello
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Roselia Maria Spanevello
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Elizandra Braganhol
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, Brazil
- Departamento de Ciências Básicas da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Brazil
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19
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Rajić Z, Beus M, Michnová H, Vlainić J, Persoons L, Kosalec I, Jampílek J, Schols D, Keser T, Zorc B. Asymmetric Primaquine and Halogenaniline Fumardiamides as Novel Biologically Active Michael Acceptors. Molecules 2018; 23:E1724. [PMID: 30011922 PMCID: PMC6100582 DOI: 10.3390/molecules23071724] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 07/10/2018] [Accepted: 07/11/2018] [Indexed: 11/17/2022] Open
Abstract
Novel primaquine (PQ) and halogenaniline asymmetric fumardiamides 4a⁻f, potential Michael acceptors, and their reduced analogues succindiamides 5a⁻f were prepared by simple three-step reactions: coupling reaction between PQ and mono-ethyl fumarate (1a) or mono-methyl succinate (1b), hydrolysis of PQ-dicarboxylic acid mono-ester conjugates 2a,b to corresponding acids 3a,b, and a coupling reaction with halogenanilines. 1-[bis(Dimethylamino)methylene]-1H-1,2,3-triazolo[4,5-b]pyridinium 3-oxide hexafluorophosphate (HATU) was used as a coupling reagent along with Hünig's base. Compounds 4 and 5 were evaluated against a panel of bacteria, several Mycobacterium strains, fungi, a set of viruses, and nine different human tumor cell lines. p-Chlorofumardiamide 4d showed significant activity against Staphylococcus aureus,Streptococcus pneumoniae and Acinetobacter baumannii, but also against Candida albicans (minimum inhibitory concentration (MIC) 6.1⁻12.5 µg/mL). Together with p-fluoro and p-CF₃ fumardiamides 4b,f, compound 4d showed activity against Mycobacterium marinum and 4b,f against M. tuberculosis. In biofilm eradication assay, most of the bacteria, particularly S. aureus, showed susceptibility to fumardiamides. m-CF₃ and m-chloroaniline fumardiamides 4e and 4c showed significant antiviral activity against reovirus-1, sindbis virus and Punta Toro virus (EC50 = 3.1⁻5.5 µM), while 4e was active against coxsackie virus B4 (EC50 = 3.1 µM). m-Fluoro derivative 4a exerted significant cytostatic activity (IC50 = 5.7⁻31.2 μM). Acute lymphoblastic leukemia cells were highly susceptible towards m-substituted derivatives 4a,c,e (IC50 = 6.7⁻8.9 μM). Biological evaluations revealed that fumardiamides 4 were more active than succindiamides 5 indicating importance of Michael conjugated system.
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Affiliation(s)
- Zrinka Rajić
- Faculty of Pharmacy and Biochemistry, University of Zagreb, A. Kovačića 1, 10000 Zagreb, Croatia.
| | - Maja Beus
- Faculty of Pharmacy and Biochemistry, University of Zagreb, A. Kovačića 1, 10000 Zagreb, Croatia.
| | - Hana Michnová
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Comenius University, Odbojárov 10, 83232 Bratislava, Slovakia.
| | - Josipa Vlainić
- Laboratory for Advanced Genomics, Division of Molecular Medicine, Rudjer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia.
| | - Leentje Persoons
- Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, KU Leuven, Herestraat 49, 3000 Leuven, Belgium.
| | - Ivan Kosalec
- Faculty of Pharmacy and Biochemistry, University of Zagreb, A. Kovačića 1, 10000 Zagreb, Croatia.
| | - Josef Jampílek
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Comenius University, Odbojárov 10, 83232 Bratislava, Slovakia.
| | - Dominique Schols
- Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, KU Leuven, Herestraat 49, 3000 Leuven, Belgium.
| | - Toma Keser
- Faculty of Pharmacy and Biochemistry, University of Zagreb, A. Kovačića 1, 10000 Zagreb, Croatia.
| | - Branka Zorc
- Faculty of Pharmacy and Biochemistry, University of Zagreb, A. Kovačića 1, 10000 Zagreb, Croatia.
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20
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Bavadi M, Niknam K. Synthesis of functionalized dihydro-2-oxopyrroles using graphene oxide as heterogeneous catalyst. Mol Divers 2018; 22:561-573. [PMID: 29318444 DOI: 10.1007/s11030-017-9809-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Accepted: 12/22/2017] [Indexed: 02/08/2023]
Abstract
A mild, efficient synthetic approach for the synthesis of highly functionalized dihydro-2-oxopyrroles is developed by using graphene oxide, a readily available and inexpensive material, as an eco-benign solid acid catalyst in ethanol at room temperature. The present methodology displays several advantages such as practical simplicity, high atom economy, easy workup procedure, and high yields of the products.
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Affiliation(s)
- Masoumeh Bavadi
- Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr, 75169, Iran
| | - Khodabakhsh Niknam
- Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr, 75169, Iran.
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Jackson PA, Widen JC, Harki DA, Brummond KM. Covalent Modifiers: A Chemical Perspective on the Reactivity of α,β-Unsaturated Carbonyls with Thiols via Hetero-Michael Addition Reactions. J Med Chem 2017; 60:839-885. [PMID: 27996267 PMCID: PMC5308545 DOI: 10.1021/acs.jmedchem.6b00788] [Citation(s) in RCA: 322] [Impact Index Per Article: 46.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Although Michael acceptors display a potent and broad spectrum of bioactivity, they have largely been ignored in drug discovery because of their presumed indiscriminate reactivity. As such, a dearth of information exists relevant to the thiol reactivity of natural products and their analogues possessing this moiety. In the midst of recently approved acrylamide-containing drugs, it is clear that a good understanding of the hetero-Michael addition reaction and the relative reactivities of biological thiols with Michael acceptors under physiological conditions is needed for the design and use of these compounds as biological tools and potential therapeutics. This Perspective provides information that will contribute to this understanding, such as kinetics of thiol addition reactions, bioactivities, as well as steric and electronic factors that influence the electrophilicity and reversibility of Michael acceptors. This Perspective is focused on α,β-unsaturated carbonyls given their preponderance in bioactive natural products.
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Affiliation(s)
- Paul A. Jackson
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - John C. Widen
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Daniel A. Harki
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Kay M. Brummond
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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