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Chhetri BK, Tedbury PR, Sweeney-Jones AM, Mani L, Soapi K, Manfredi C, Sorscher E, Sarafianos SG, Kubanek J. Marine Natural Products as Leads against SARS-CoV-2 Infection. JOURNAL OF NATURAL PRODUCTS 2022; 85:657-665. [PMID: 35290044 PMCID: PMC8936055 DOI: 10.1021/acs.jnatprod.2c00015] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Indexed: 05/13/2023]
Abstract
Since early 2020, disease caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has become a global pandemic, causing millions of infections and deaths worldwide. Despite rapid deployment of effective vaccines, it is apparent that the global community lacks multipronged interventions to combat viral infection and disease. A major limitation is the paucity of antiviral drug options representing diverse molecular scaffolds and mechanisms of action. Here we report the antiviral activities of three distinct marine natural products─homofascaplysin A (1), (+)-aureol (2), and bromophycolide A (3)─evidenced by their ability to inhibit SARS-CoV-2 replication at concentrations that are nontoxic toward human airway epithelial cells. These compounds stand as promising candidates for further exploration toward the discovery of novel drug leads against SARS-CoV-2.
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Affiliation(s)
- Bhuwan Khatri Chhetri
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Philip R. Tedbury
- Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | | | - Luke Mani
- Institute of Applied Sciences, University of South Pacific, Suva, Fiji
| | - Katy Soapi
- Institute of Applied Sciences, University of South Pacific, Suva, Fiji
| | - Candela Manfredi
- Department of Pediatrics, Division of Pulmonary Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Eric Sorscher
- Department of Pediatrics, Division of Pulmonary Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Stefan G. Sarafianos
- Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Julia Kubanek
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, GA 30332, USA
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
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2
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Affiliation(s)
- Jyoti Verma
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Naidu Subbarao
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
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Liu D, Li Y, Guo X, Ji W, Lin W. Chartarlactams Q-T, Dimeric Phenylspirodrimanes with Antibacterial and Antiviral Activities. Chem Biodivers 2020; 17:e2000170. [PMID: 32289204 DOI: 10.1002/cbdv.202000170] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 04/14/2020] [Indexed: 12/31/2022]
Abstract
Four new phenylspirodrimane-type dimers, namely chartarlactams Q-T, along with stachyin B were isolated from the fermentation broth of a sponge-derived fungus Stachybotrys chartarum WGC-25 C-6. Chartarlactams Q-T were structurally featured by the dimerization of two units of phenylspirodrimane linked by a C-N bond. Their structures were determined on the basis of extensive spectroscopic analysis, while quantum ECD calculation and modified Mosher's method were used for the assignment of absolute configurations. Chartarlactams Q-S and stachyin B showed moderate inhibition against bacterial pathogen Staphylococcus aureus with MIC values ranging from 4 μg/mL to 16 μg/mL, and chartarlactam T exhibited significant inhibition toward ZIKV virus.
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Affiliation(s)
- Dong Liu
- State Key Laboratory of Natural and Biomimetic Drugs, Institute of Ocean Research, Peking University, Beijing, 100191, P. R. China
| | - Yong Li
- State Key Laboratory of Natural and Biomimetic Drugs, Institute of Ocean Research, Peking University, Beijing, 100191, P. R. China
| | - Xingchen Guo
- State Key Laboratory of Natural and Biomimetic Drugs, Institute of Ocean Research, Peking University, Beijing, 100191, P. R. China
| | - Wei Ji
- Basic Medical School, Peking University, Beijing, 100191, P. R. China
| | - Wenhan Lin
- State Key Laboratory of Natural and Biomimetic Drugs, Institute of Ocean Research, Peking University, Beijing, 100191, P. R. China
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Haut FL, Speck K, Wildermuth R, Möller K, Mayer P, Magauer T. A Negishi cross-coupling reaction enables the total synthesis of (+)-stachyflin. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.02.048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Coutant T, Vergneau-Grosset C, Langlois I. Overview of Drug Delivery Methods in Exotics, Including Their Anatomic and Physiologic Considerations. Vet Clin North Am Exot Anim Pract 2018; 21:215-259. [PMID: 29655468 DOI: 10.1016/j.cvex.2018.01.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Drug delivery to exotic animals may be extrapolated from domestic animals, but some physiologic and anatomic differences complicate treatment administration. Knowing these differences enables one to choose optimal routes for drug delivery. This review provides practitioners with a detailed review of the currently reported methods used for drug delivery of various medications in the most common exotic animal species. Exotic animal peculiarities that are relevant for drug administration are discussed in the text and outlined in tables and boxes to help the reader easily find targeted information.
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Affiliation(s)
- Thomas Coutant
- Zoological Medicine Service, Department of Clinical Sciences, CHUV (Centre Hospitalier Universitaire Vétérinaire), Faculté de Médecine Vétérinaire, Université de Montréal, 3200 rue Sicotte, Saint-Hyacinthe, Québec J2S2M2, Canada
| | - Claire Vergneau-Grosset
- Zoological Medicine Service, Department of Clinical Sciences, CHUV (Centre Hospitalier Universitaire Vétérinaire), Faculté de Médecine Vétérinaire, Université de Montréal, 3200 rue Sicotte, Saint-Hyacinthe, Québec J2S2M2, Canada
| | - Isabelle Langlois
- Zoological Medicine Service, Department of Clinical Sciences, CHUV (Centre Hospitalier Universitaire Vétérinaire), Faculté de Médecine Vétérinaire, Université de Montréal, 3200 rue Sicotte, Saint-Hyacinthe, Québec J2S2M2, Canada.
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A modular synthesis of tetracyclic meroterpenoid antibiotics. Nat Commun 2017; 8:2083. [PMID: 29234008 PMCID: PMC5727219 DOI: 10.1038/s41467-017-02061-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 11/02/2017] [Indexed: 11/08/2022] Open
Abstract
Stachyflin, aureol, smenoqualone, strongylin A, and cyclosmenospongine belong to a family of tetracyclic meroterpenoids, which, by nature of their unique molecular structures and various biological properties, have attracted synthetic and medicinal chemists alike. Despite their obvious biosynthetic relationship, only scattered reports on the synthesis and biological investigation of individual meroterpenoids have appeared so far. Herein, we report a highly modular synthetic strategy that enabled the synthesis of each of these natural products and 15 non-natural derivatives. The route employs an auxiliary-controlled Diels-Alder reaction to enable the enantioselective construction of the decalin subunit, which is connected to variously substituted arenes by either carbonyl addition chemistry or sterically demanding sp2-sp3 cross-coupling reactions. The selective installation of either the cis- or trans-decalin stereochemistry is accomplished by an acid-mediated cyclization/isomerization reaction. Biological profiling reveals that strongylin A and a simplified derivative thereof have potent antibiotic activity against methicillin-resistant Staphylococcus aureus.
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Igarashi M. [Antiviral Drugs Targeting Influenza Virus Surface Proteins: A Computational Structural Biology Approach]. YAKUGAKU ZASSHI 2016; 135:1015-21. [PMID: 26329546 DOI: 10.1248/yakushi.15-00175-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
For the prevention and control of infectious viral diseases, vaccines and antiviral drugs targeting viral proteins are of great importance. Amino acid substitutions in viral proteins occasionally cause the emergence of antibody-escape and drug-resistant mutants. With regard to this, we have studied the proteins of several viruses, especially the influenza A virus, by using techniques of computational chemistry and biology such as molecular modeling, molecular docking, and molecular dynamics simulations. Influenza A virus is a zoonotic pathogen that is transmitted from animals to humans. This virus has two surface glycoproteins, hemagglutinin (HA) and neuraminidase (NA). The HA of influenza viruses plays a key role in the initiation of viral infection. And HA is also the major target of antibodies that neutralize viral infectivity. Some amino acid substitutions in the antigenic epitope on HA could decrease the interaction between HA and antibodies, leading to the generation of antigenic variants with novel antigenic structures of HA. In addition, HA protein seems to be a favorable target for anti-influenza drugs, but effective HA inhibitors have not been developed due to the emergence of drug-resistant viruses with amino acid substitutions on the HA. To understand how amino acid substitutions affect changes in drug susceptibility, we have been computationally analyzing the three-dimensional structures of influenza virus proteins. In this paper, we review the results obtained through our current analysis.
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Affiliation(s)
- Manabu Igarashi
- Division of Global Epidemiology, Hokkaido University Research Center for Zoonosis Control
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Agamennone M, Pietrantoni A, Superti F. Identification of small molecules acting against H1N1 influenza A virus. Virology 2015; 488:249-58. [PMID: 26655243 DOI: 10.1016/j.virol.2015.11.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 10/04/2015] [Accepted: 11/20/2015] [Indexed: 10/22/2022]
Abstract
Influenza virus represents a serious threat to public health. The lack of effective drugs against flu prompted researchers to identify more promising viral target. In this respect hemagglutinin (HA) can represent an interesting option because of its pivotal role in the infection process. With this aim we collected a small library of commercially available compounds starting from a large database and performing a diversity-based selection to reduce the number of screened compounds avoiding structural redundancy of the library. Selected compounds were tested for their hemagglutination-inhibiting (HI) ability against two different A/H1N1 viral strains (one of which is oseltamivir sensitive), and 17 of them showed the ability to interact with HA. Five drug-like molecules, in particular, were able to impair hemagglutination of both A/H1N1 viral strains under study and to inhibit cytopathic effect and hemolysis at sub-micromolar level.
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Affiliation(s)
- Mariangela Agamennone
- Department of Pharmacy, University "G. d'Annunzio", Via dei Vestini 31, 66100 Chieti, Italy
| | - Agostina Pietrantoni
- Department of Technology and Health, National Institute of Health, Viale Regina Elena 299, 00161 Rome, Italy
| | - Fabiana Superti
- Department of Technology and Health, National Institute of Health, Viale Regina Elena 299, 00161 Rome, Italy.
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Motohashi Y, Igarashi M, Okamatsu M, Noshi T, Sakoda Y, Yamamoto N, Ito K, Yoshida R, Kida H. Antiviral activity of stachyflin on influenza A viruses of different hemagglutinin subtypes. Virol J 2013; 10:118. [PMID: 23587221 PMCID: PMC3648499 DOI: 10.1186/1743-422x-10-118] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Accepted: 04/11/2013] [Indexed: 01/21/2023] Open
Abstract
Background The hemagglutinin (HA) of influenza viruses is a possible target for antiviral drugs because of its key roles in the initiation of infection. Although it was found that a natural compound, Stachyflin, inhibited the growth of H1 and H2 but not H3 influenza viruses in MDCK cells, inhibitory activity of the compound has not been assessed against H4-H16 influenza viruses and the precise mechanism of inhibition has not been clarified. Methods Inhibitory activity of Stachyflin against H4-H16 influenza viruses, as well as H1-H3 viruses was examined in MDCK cells. To identify factors responsible for the susceptibility of the viruses to this compound, Stachyflin-resistant viruses were selected in MDCK cells and used for computer docking simulation. Results It was found that in addition to antiviral activity of Stachyflin against influenza viruses of H1 and H2 subtypes, it inhibited replication of viruses of H5 and H6 subtypes, as well as A(H1N1)pdm09 virus in MDCK cells. Stachyflin also inhibited the virus growth in the lungs of mice infected with A/WSN/1933 (H1N1) and A/chicken/Ibaraki/1/2005 (H5N2). Substitution of amino acid residues was found on the HA2 subunit of Stachyflin-resistant viruses. Docking simulation indicated that D37, K51, T107, and K121 are responsible for construction of the cavity for the binding of the compound. In addition, 3-dimensional structure of the cavity of the HA of Stachyflin-susceptible virus strains was different from that of insusceptible virus strains. Conclusion Antiviral activity of Stachyflin was found against A(H1N1)pdm09, H5, and H6 viruses, and identified a potential binding pocket for Stachyflin on the HA. The present results should provide us with useful information for the development of HA inhibitors with more effective and broader spectrum.
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Affiliation(s)
- Yurie Motohashi
- Department of Disease Control, Hokkaido University, Sapporo, Japan
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Barron HW, Rosenthal KL. Respiratory Diseases. FERRETS, RABBITS, AND RODENTS 2012. [PMCID: PMC7152247 DOI: 10.1016/b978-1-4160-6621-7.00006-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Sakurai J, Kikuchi T, Takahashi O, Watanabe K, Katoh T. Enantioselective Total Synthesis of (+)-Stachyflin: A Potential Anti-Influenza A Virus Agent Isolated from a Microorganism. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100173] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Jiang S, Li R, Du L, Liu S. Roles of the hemagglutinin of influenza A virus in viral entry and development of antiviral therapeutics and vaccines. Protein Cell 2010; 1:342-354. [PMID: 21203946 PMCID: PMC4728157 DOI: 10.1007/s13238-010-0054-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2010] [Accepted: 03/31/2010] [Indexed: 11/25/2022] Open
Abstract
Seasonal influenza epidemics and influenza pandemics caused by influenza A virus (IAV) has resulted in millions of deaths in the world. The development of anti-IAV vaccines and therapeutics is urgently needed for prevention and treatment of IAV infection and for controlling future influenza pandemics. Hemagglutinin (HA) of IAV plays a critical role in viral binding, fusion and entry, and contains the major neutralizing epitopes. Therefore, HA is an attractive target for developing anti-IAV drugs and vaccines. Here we have reviewed the recent progress in study of conformational changes of HA during viral fusion process and development of HA-based antiviral therapeutics and vaccines.
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Affiliation(s)
- Shibo Jiang
- Lindsley F. Kimball Research Institute, New York Blood Center, New York, NY, 10065, USA. .,School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China.
| | - Runming Li
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Lanying Du
- Lindsley F. Kimball Research Institute, New York Blood Center, New York, NY, 10065, USA
| | - Shuwen Liu
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China.
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Watanabe K, Sakurai J, Abe H, Katoh T. Total synthesis of (+)-stachyflin: a potential anti-influenza A virus agent. Chem Commun (Camb) 2010; 46:4055-7. [PMID: 20361095 DOI: 10.1039/c000193g] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first enantioselective total synthesis of (+)-stachyflin, a potential anti-influenza A virus agent, was achieved; the method features a BF(3).Et(2)O-induced domino epoxide-opening/rearrangement/cyclization reaction to stereoselectively form the requisite pentacyclic ring system in one step.
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Affiliation(s)
- Kazuhiro Watanabe
- Laboratory of Synthetic Medicinal Chemistry, Department of Chemical Pharmaceutical Science, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, 981-8558, Aoba-ku, Sendai, Japan
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