1
|
Andreu S, von Kobbe C, Delgado P, Ripa I, Buzón MJ, Genescà M, Gironès N, del Moral-Salmoral J, Ramírez GA, Zúñiga S, Enjuanes L, López-Guerrero JA, Bello-Morales R. Dextran sulfate from Leuconostoc mesenteroides B512F exerts potent antiviral activity against SARS-CoV-2 in vitro and in vivo. Front Microbiol 2023; 14:1185504. [PMID: 37206325 PMCID: PMC10189130 DOI: 10.3389/fmicb.2023.1185504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 04/11/2023] [Indexed: 05/21/2023] Open
Abstract
The emergent human coronavirus SARS-CoV-2 and its resistance to current drugs makes the need for new potent treatments for COVID-19 patients strongly necessary. Dextran sulfate (DS) polysaccharides have long demonstrated antiviral activity against different enveloped viruses in vitro. However, their poor bioavailability has led to their abandonment as antiviral candidates. Here, we report for the first time the broad-spectrum antiviral activity of a DS-based extrapolymeric substance produced by the lactic acid bacterium Leuconostoc mesenteroides B512F. Time of addition assays with SARS-CoV-2 pseudoviruses in in vitro models confirm the inhibitory activity of DSs in the early stages of viral infection (viral entry). In addition, this exopolysaccharide substance also reports broad-spectrum antiviral activity against several enveloped viruses such as SARS-CoV-2, HCoV229E, HSV-1, in in vitro models and in human lung tissue. The toxicity and antiviral capacity of DS from L. mesenteroides was tested in vivo in mouse models which are susceptible to SARS-CoV-2 infection. The described DS, administered by inhalation, a new route of administration for these types of polymers, shows strong inhibition of SARS-CoV-2 infection in vivo, significantly reducing animal mortality and morbidity at non-toxic doses. Therefore, we suggest that it may be considered as a potential candidate for antiviral therapy against SARS-CoV-2.
Collapse
Affiliation(s)
- Sabina Andreu
- Department of Molecular Biology, Universidad Autónoma de Madrid, Madrid, Spain
- Centro de Biología Molecular Severo Ochoa, Spanish National Research Council—Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
- *Correspondence: Sabina Andreu
| | - Cayetano von Kobbe
- Centro de Biología Molecular Severo Ochoa, Spanish National Research Council—Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
| | - Pilar Delgado
- Centro de Biología Molecular Severo Ochoa, Spanish National Research Council—Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
| | - Inés Ripa
- Department of Molecular Biology, Universidad Autónoma de Madrid, Madrid, Spain
- Centro de Biología Molecular Severo Ochoa, Spanish National Research Council—Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
| | - María José Buzón
- Infectious Diseases Department, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, VHIR Task Force COVID-19, Barcelona, Spain
| | - Meritxell Genescà
- Infectious Diseases Department, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, VHIR Task Force COVID-19, Barcelona, Spain
| | - Núria Gironès
- Centro de Biología Molecular Severo Ochoa, Spanish National Research Council—Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
| | - Javier del Moral-Salmoral
- Centro de Biología Molecular Severo Ochoa, Spanish National Research Council—Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
| | | | - Sonia Zúñiga
- Department of Molecular and Cell Biology, Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
| | - Luis Enjuanes
- Department of Molecular and Cell Biology, Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
| | - José Antonio López-Guerrero
- Department of Molecular Biology, Universidad Autónoma de Madrid, Madrid, Spain
- Centro de Biología Molecular Severo Ochoa, Spanish National Research Council—Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
| | - Raquel Bello-Morales
- Department of Molecular Biology, Universidad Autónoma de Madrid, Madrid, Spain
- Centro de Biología Molecular Severo Ochoa, Spanish National Research Council—Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
| |
Collapse
|
2
|
Serrano-Aroca Á, Ferrandis-Montesinos M, Wang R. Antiviral Properties of Alginate-Based Biomaterials: Promising Antiviral Agents against SARS-CoV-2. ACS APPLIED BIO MATERIALS 2021; 4:5897-5907. [PMID: 35006918 PMCID: PMC8291135 DOI: 10.1021/acsabm.1c00523] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 06/26/2021] [Indexed: 12/13/2022]
Abstract
The COVID-19 pandemic has made it essential to explore alternative antiviral materials. Alginate is a biodegradable, renewable, biocompatible, water-soluble and antiviral biopolymer with many potential biomedical applications. In this regard, this review shows 17 types of viruses that have been tested in contact with alginate and its related biomaterials. Most of these studies show that alginate-based materials possess little or no toxicity and are able to inhibit a wide variety of viruses affecting different organisms: in humans by the human immunodeficiency virus type 1, the hepatitis A, B, and C viruses, Sindbis virus, herpes simplex virus type 1 and 2, poliovirus type 1, rabies virus, rubella virus, and the influenza virus; in mice by the murine norovirus; in bacteria by the T4 coliphage, and in plants by the tobacco mosaic virus and the potato virus X. Many of these are enveloped positive-sense single-stranded RNA viruses, like SARS-CoV-2, which render alginate-based materials highly promising in the COVID-19 pandemic.
Collapse
Affiliation(s)
- Ángel Serrano-Aroca
- Biomaterials and Bioengineering Lab, Centro de
Investigación Traslacional San Alberto Magno, Universidad
Católica de Valencia San Vicente Mártir, c/Guillem de Castro
94, 46001 Valencia, Spain
| | - María Ferrandis-Montesinos
- Institute of Bioengineering, Universidad
Miguel Hernández, Campus de Elche, 03202 Elche, Alicante,
Spain
| | - Ruibing Wang
- State Key Laboratory of Quality Research in Chinese
Medicine, Institute of Chinese Medical Sciences, University of
Macau, Taipa, Macau 999078, China
| |
Collapse
|
3
|
A Review of Antiviral and Antioxidant Activity of Bioactive Metabolite of Macroalgae within an Optimized Extraction Method. ENERGIES 2021. [DOI: 10.3390/en14113092] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Non-conventional extraction of bioactive metabolites could provide sustainable alternative techniques to preserve the potency of antioxidants and antiviral compounds extracted from macro-algae. In this paper, we first reviewed the antioxidant and antiviral potential of the active metabolites that exist in the three known macro-algae classes; Phaeophyceae, Rhodophyceae, and Chlorophyceae, and a comparison between their activities is discussed. Secondly, a review of conventional and non-conventional extraction methods is undertaken. The review then focused on identifying the optimal extraction method of sulphated polysaccharide from macro-algae that exhibits both antiviral and antioxidant activity. The review finds that species belonging to the Phaeophyceae and Rhodophceae classes are primarily potent against herpes simplex virus, followed by human immunodeficiency virus and influenza virus. At the same time, species belonging to Chlorophyceae class are recorded by most of the scholars to have antiviral activity against herpes simplex virus 1. Additionally, all three macro-algae classes exhibit antioxidant activity, the potency of which is a factor of the molecular structure of the bioactive metabolite as well as the extraction method applied.
Collapse
|
4
|
He X, Fang J, Guo Q, Wang M, Li Y, Meng Y, Huang L. Advances in antiviral polysaccharides derived from edible and medicinal plants and mushrooms. Carbohydr Polym 2020; 229:115548. [DOI: 10.1016/j.carbpol.2019.115548] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 10/06/2019] [Accepted: 10/27/2019] [Indexed: 12/21/2022]
|
5
|
Abstract
Herpes simplex viruses (HSVs) are common human pathogens belonging to the subfamily alpha-herpesvirinae that trigger severe infections in neonates and immunocompromised patients. After primary infection, the HSVs establish a lifelong latent infection in the vegetative neural ganglia of their hosts. HSV infections contribute to substantial disease burden in humans as well as in newborns. Despite a fair number of drugs being available for the treatment of HSV infections, new, effective, and safe antiviral agents, exerting different mechanisms of action, are urgently required, mainly due to the increasing number of resistant strains. Accumulating pieces of evidence have suggested that structurally diverse compounds from marine algae possess promising anti-HSV potentials. Several studies have documented a variety of algal polysaccharides possessing anti-HSV activity, including carrageenan and fucan. This review aimed to compile previous anti-HSV studies on marine algae–derived compounds, especially sulfated polysaccharides, along with their mode of action, toward their development as novel natural anti-HSV agents for future investigations.
Collapse
|
6
|
Guryanov I, Real-Fernández F, Sabatino G, Prisco N, Korzhikov-Vlakh V, Biondi B, Papini AM, Korzhikova-Vlakh E, Rovero P, Tennikova T. Modeling interaction between gp120 HIV protein and CCR5 receptor. J Pept Sci 2019; 25:e3142. [PMID: 30680875 DOI: 10.1002/psc.3142] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 11/22/2018] [Accepted: 11/23/2018] [Indexed: 02/06/2023]
Abstract
The study of the process of HIV entry into the host cell and the creation of biomimetic nanosystems that are able to selectively bind viral particles and proteins is a high priority research area for the development of novel diagnostic tools and treatment of HIV infection. Recently, we described multilayer nanoparticles (nanotraps) with heparin surface and cationic peptides comprising the N-terminal tail (Nt) and the second extracellular loop (ECL2) of CCR5 receptor, which could bind with high affinity some inflammatory chemokines, in particular, Rantes. Because of the similarity of the binding determinants in CCR5 structure, both for chemokines and gp120 HIV protein, here we expand this approach to the study of the interactions of these biomimetic nanosystems and their components with the peptide representing the V3 loop of the activated form of gp120. According to surface plasmon resonance results, a conformational rearrangement is involved in the process of V3 and CCR5 fragments binding. As in the case of Rantes, ECL2 peptide showed much higher affinity to V3 peptide than Nt (KD = 3.72 × 10-8 and 1.10 × 10-6 M, respectively). Heparin-covered nanoparticles bearing CCR5 peptides effectively bound V3 as well. The presence of both heparin and the peptides in the structure of the nanotraps was shown to be crucial for the interaction with the V3 loop. Thus, short cationic peptides ECL2 and Nt proved to be excellent candidates for the design of CCR5 receptor mimetics.
Collapse
Affiliation(s)
- I Guryanov
- Institute of Chemistry, St. Petersburg State University, St. Petersburg, 198504, Russia
| | - F Real-Fernández
- Laboratory of Peptide and Protein Chemistry and Biology, Department of Chemistry "Ugo Schiff", University of Florence, 50019, Sesto Fiorentino, Italy
| | - G Sabatino
- Laboratory of Peptide and Protein Chemistry and Biology, Department of Chemistry "Ugo Schiff", University of Florence, 50019, Sesto Fiorentino, Italy.,CNR Istituto di Biostrutture e Bioimmagini, 95126, Catania, Italy
| | - N Prisco
- Laboratory of Peptide and Protein Chemistry and Biology, Department of NeuroFarBa, University of Florence, 50019, Sesto Fiorentino, Italy
| | - V Korzhikov-Vlakh
- Institute of Chemistry, St. Petersburg State University, St. Petersburg, 198504, Russia
| | - B Biondi
- CNR-ICB, Padova Unit, Department of Chemistry, University of Padova, 35131, Padova, Italy
| | - A M Papini
- Laboratory of Peptide and Protein Chemistry and Biology, Department of Chemistry "Ugo Schiff", University of Florence, 50019, Sesto Fiorentino, Italy.,PeptLab@UCP Platform and Laboratory of Chemical Biology EA4505, University Paris-Seine, 95031, Cergy-Pontoise CEDEX, France
| | - E Korzhikova-Vlakh
- Institute of Chemistry, St. Petersburg State University, St. Petersburg, 198504, Russia
| | - P Rovero
- CNR Istituto di Biostrutture e Bioimmagini, 95126, Catania, Italy.,Laboratory of Peptide and Protein Chemistry and Biology, Department of NeuroFarBa, University of Florence, 50019, Sesto Fiorentino, Italy
| | - T Tennikova
- Institute of Chemistry, St. Petersburg State University, St. Petersburg, 198504, Russia
| |
Collapse
|
7
|
Shi Q, Wang A, Lu Z, Qin C, Hu J, Yin J. Overview on the antiviral activities and mechanisms of marine polysaccharides from seaweeds. Carbohydr Res 2017; 453-454:1-9. [PMID: 29102716 DOI: 10.1016/j.carres.2017.10.020] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 09/29/2017] [Accepted: 10/27/2017] [Indexed: 10/18/2022]
Abstract
Marine polysaccharides are attracting increasing attention in medical and pharmaceutical development because of their important biological properties. The seaweed polysaccharides have now become a rich resource of potential antiviral drugs due to their antiviral activities against various viruses. The structural diversity and complexity of marine polysaccharides and their derivatives contribute to their antiviral activities in different phases of many different viral infection processes. This review mainly introduces the different types of seaweed polysaccharides and their derivatives with potent antiviral activities. Moreover, the antiviral mechanisms and medical applications of certain marine polysaccharides from seaweeds are also demonstrated.
Collapse
Affiliation(s)
- Qimin Shi
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Lihu Avenue1800, Wuxi 214122, China
| | - Anjian Wang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Lihu Avenue1800, Wuxi 214122, China
| | - Zhonghua Lu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Lihu Avenue1800, Wuxi 214122, China; Wuxi No.5 People's Hospital, Xingyuan Rd. 88, Wuxi 214002, China
| | - Chunjun Qin
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Lihu Avenue1800, Wuxi 214122, China
| | - Jing Hu
- Wuxi School of Medicine, Jiangnan University, Lihu Avenue 1800, 214122, Wuxi, China.
| | - Jian Yin
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Lihu Avenue1800, Wuxi 214122, China.
| |
Collapse
|
8
|
Hashimoto K, Kodama E, Mori S, Watanabe J, Baba M, Okutani K, Matsuda M, Shigeta S. Antiviral Activity of a Sulphated Polysaccharide Extracted from the Marine Pseudomonas and Marine Plant Dinoflagellata against Human Immunodeficiency Viruses and other Enveloped Viruses. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029600700403] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A natural sulphated mucopolysaccharide (OKU40), extracted from a marine plant Dinoflagellata, and an artificial sulphated polysaccharide (OKU41), prepared from a marine Pseudomonas, displayed antiviral activities against several enveloped viruses. OKU40 and OKU41 were found to be homogenous in electrophoresis and sedimation velocity and had a molecular weight of 8.0 × 1065.0 × 105respectively. The sulphation rate of OKU40 and OKU41 was 8.9% and 5.4%, respectively. Each OKU40 and OKU41 inhibited the cytopathic effect of human immunodeficiency virus type 1 (HIV-1), type 2 (HIV-2) and zidovudineresistant HIV-1 in MT-4 cells at similar concentrations to those of dextran sulphate (molecular weight: 5000) (50% inhibitory concentrations: 0.86-1.95 μg mL−1), whereas these compounds did not affect the growth and viability of mock-infected MT-4 cells at concentrations up to 500 μg mL−1. These compounds proved inhibitory not only to HIV-1 and HIV-2 but also to other enveloped viruses, i.e. herpes simplex virus type 1, influenza virus A and B, respiratory syncytial virus and measles virus. OKU40 and OKU41 suppressed syncytium formation induced by cocultivation of MOLT-4/IIIb and MOLT-4 cells at concentrations higher than 20 μg mL−1. Although OKU41 inhibited the binding of HIV-1 to the host cells and the binding of anti-gp120 monoclonal antibody to HIV-1 gp120, OKU40 did not inhibit these bindings, suggesting that the mechanism of anti-HIV activity of OKU40 and OKU41 may be primarily due to the inhibition of virus-cell fusion and viral adsorption to the host cells, respectively. Furthermore, these compounds did not inhibit to the blood coagulation process at a concentration that was significantly inhibitory to HIV replication. The compounds appear to have an interesting potential as virucidal agents.
Collapse
Affiliation(s)
- K. Hashimoto
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - E. Kodama
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - S. Mori
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - J. Watanabe
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| | - M. Baba
- Division of Human Retroviruses, Centre for Chronic Viral Diseases, Faculty of Medicine, Kagoshima University, Kagoshima 890, Japan
| | - K. Okutani
- Faculty of Agriculture, Kagawa University, Kagawa 761-07, Japan
| | - M. Matsuda
- Faculty of Agriculture, Kagawa University, Kagawa 761-07, Japan
| | - S. Shigeta
- Department of Microbiology, Fukushima Medical College, Fukushima 960-12, Japan
| |
Collapse
|
9
|
Szczubiałka K, Pyrć K, Nowakowska M. In search for effective and definitive treatment of herpes simplex virus type 1 (HSV-1) infections. RSC Adv 2016. [DOI: 10.1039/c5ra22896d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Herpes Simplex Virus type 1 (HSV-1) is a nuclear replicating enveloped virus.
Collapse
Affiliation(s)
| | - Krzysztof Pyrć
- Faculty of Biochemistry, Biophysics and Biotechnology
- Jagiellonian University
- 30-387 Kraków
- Poland
| | | |
Collapse
|
10
|
Tang F, Chen F, Li F. Preparation and potentialin vivoanti-influenza virus activity of low molecular-weight κ-carrageenans and their derivatives. J Appl Polym Sci 2012. [DOI: 10.1002/app.37502] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
11
|
Baranova EO, Shastina NS, Shvets VI. Polyanionic inhibitors of HIV adsorption. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2011; 37:592-608. [DOI: 10.1134/s1068162011050037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
|
12
|
Gold nanoparticles capped with sulfate-ended ligands as anti-HIV agents. Bioorg Med Chem Lett 2010; 20:2718-21. [DOI: 10.1016/j.bmcl.2010.03.079] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Revised: 03/17/2010] [Accepted: 03/19/2010] [Indexed: 11/22/2022]
|
13
|
Isolation of a sulphated polysaccharide from a recently discovered sponge species (Celtodoryx girardae) and determination of its anti-herpetic activity. Int J Biol Macromol 2009; 44:286-93. [PMID: 19263508 DOI: 10.1016/j.ijbiomac.2009.01.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Exopolysaccharides (EPS) were extracted from a sponge, Celtodoryx girardae recently discovered in the Golfe du Morbihan in 2000. Sponge samples were collected monthly from November 2007 to May 2008. SEC analysis of EPS samples showed that they exhibit a unique molecular weight of approximately 800 kDa. However, infrared analysis revealed that structural seasonal variations occur. EPS fractions also exhibit significant sulphate contents and were screened in vitro for a potential antiviral activity against Herpes simplex virus type 1 (HSV-1). The best result was obtained with a sample collected in January which exhibits an EC(50) of 5.9 microg/mL without cytotoxicity on the Vero cell line. Experiments carried out to elucidate the mechanism of the EPS showed that the sulphated groups of EPS interact with the glycoproteins on the surface of the virus' membrane.
Collapse
|
14
|
Couffin-Hoarau AC, Aubertin AM, Boustta M, Schmidt S, Fehrentz JA, Martinez J, Vert M. Peptide−Poly(l-lysine citramide) Conjugates and their In Vitro Anti-HIV Behavior. Biomacromolecules 2009; 10:865-76. [DOI: 10.1021/bm801376v] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anne-Claude Couffin-Hoarau
- Research Centre on Artificial Biopolymers, UMR CNRS 5473, and Laboratory of Amino Acids, Peptides and Proteins (LAPP), UMR CNRS 5810, Faculty of Pharmacy, University Montpellier 1, 15 Avenue Charles Flahault, BP 14491, F-34093 Montpellier Cedex 2, France, and Institute of Virology, University Louis Pasteur, INSERM U778, 3 rue Koeberlé, 67000 Strasbourg, France
| | - Anne-Marie Aubertin
- Research Centre on Artificial Biopolymers, UMR CNRS 5473, and Laboratory of Amino Acids, Peptides and Proteins (LAPP), UMR CNRS 5810, Faculty of Pharmacy, University Montpellier 1, 15 Avenue Charles Flahault, BP 14491, F-34093 Montpellier Cedex 2, France, and Institute of Virology, University Louis Pasteur, INSERM U778, 3 rue Koeberlé, 67000 Strasbourg, France
| | - Mahfoud Boustta
- Research Centre on Artificial Biopolymers, UMR CNRS 5473, and Laboratory of Amino Acids, Peptides and Proteins (LAPP), UMR CNRS 5810, Faculty of Pharmacy, University Montpellier 1, 15 Avenue Charles Flahault, BP 14491, F-34093 Montpellier Cedex 2, France, and Institute of Virology, University Louis Pasteur, INSERM U778, 3 rue Koeberlé, 67000 Strasbourg, France
| | - Sylvie Schmidt
- Research Centre on Artificial Biopolymers, UMR CNRS 5473, and Laboratory of Amino Acids, Peptides and Proteins (LAPP), UMR CNRS 5810, Faculty of Pharmacy, University Montpellier 1, 15 Avenue Charles Flahault, BP 14491, F-34093 Montpellier Cedex 2, France, and Institute of Virology, University Louis Pasteur, INSERM U778, 3 rue Koeberlé, 67000 Strasbourg, France
| | - Jean-Alain Fehrentz
- Research Centre on Artificial Biopolymers, UMR CNRS 5473, and Laboratory of Amino Acids, Peptides and Proteins (LAPP), UMR CNRS 5810, Faculty of Pharmacy, University Montpellier 1, 15 Avenue Charles Flahault, BP 14491, F-34093 Montpellier Cedex 2, France, and Institute of Virology, University Louis Pasteur, INSERM U778, 3 rue Koeberlé, 67000 Strasbourg, France
| | - Jean Martinez
- Research Centre on Artificial Biopolymers, UMR CNRS 5473, and Laboratory of Amino Acids, Peptides and Proteins (LAPP), UMR CNRS 5810, Faculty of Pharmacy, University Montpellier 1, 15 Avenue Charles Flahault, BP 14491, F-34093 Montpellier Cedex 2, France, and Institute of Virology, University Louis Pasteur, INSERM U778, 3 rue Koeberlé, 67000 Strasbourg, France
| | - Michel Vert
- Research Centre on Artificial Biopolymers, UMR CNRS 5473, and Laboratory of Amino Acids, Peptides and Proteins (LAPP), UMR CNRS 5810, Faculty of Pharmacy, University Montpellier 1, 15 Avenue Charles Flahault, BP 14491, F-34093 Montpellier Cedex 2, France, and Institute of Virology, University Louis Pasteur, INSERM U778, 3 rue Koeberlé, 67000 Strasbourg, France
| |
Collapse
|
15
|
Lee JB, Hou X, Hayashi K, Hayashi T. Effect of partial desulfation and oversulfation of sodium spirulan on the potency of anti-herpetic activities. Carbohydr Polym 2007. [DOI: 10.1016/j.carbpol.2007.01.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
16
|
Jiang YP, Guo XK, Chen Y. O-Succinyl derivative of ι-carrageenan fragments: Synthesis and characterization. Carbohydr Polym 2007. [DOI: 10.1016/j.carbpol.2006.11.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
17
|
Mandal P, Mateu CG, Chattopadhyay K, Pujol CA, Damonte EB, Ray B. Structural features and antiviral activity of sulphated fucans from the brown seaweed Cystoseira indica. Antivir Chem Chemother 2007; 18:153-62. [PMID: 17626599 DOI: 10.1177/095632020701800305] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Natural compounds offer interesting pharmacological perspectives for antiviral drug development. In this study, we have analysed sulphated-fucan-containing fractions isolated from the brown seaweed Cystoseira indica. The crude water extract (CiWE) and the main fraction (CiF3) obtained by anion exchange chromatography had potent antiviral activity against herpes simplex virus types 1 (HSV-1) and 2 (HSV-2) without cytotoxicity for Vero cell cultures. Furthermore, they had no direct inactivating effect on virions in a virucidal assay, and lacked anticoagulant activity. The mode of action of these compounds could be mainly ascribed to an inhibitory effect on virus adsorption. Chemical, chromatographic and spectroscopic methods showed that the major polysaccharide had an apparent molecular mass of 35 kDa and contained a backbone of alpha-(1 --> 3)-linked fucopyranosyl residues substituted at C-2 with fucopyranosyl and xylopyranosyl residues. This sulphated fucan, considered the active principle of the C. indica water extract, also contained variously linked xylose and galactose units and glucuronic acid residues. Sulphate groups, if present, are located mostly at C-4 of (1 --> 3)-linked fucopyranosyl units, and appeared to be very important for the anti-herpetic activity of this polymer.
Collapse
Affiliation(s)
- Pinaki Mandal
- Natural Products Laboratory, Department of Chemistry, The University of Burdwan, WB, India
| | | | | | | | | | | |
Collapse
|
18
|
Zhu W, Chiu LCM, Ooi VEC, Chan PKS, Ang PO. Antiviral property and mechanisms of a sulphated polysaccharide from the brown alga Sargassum patens against Herpes simplex virus type 1. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2006; 13:695-701. [PMID: 16427262 DOI: 10.1016/j.phymed.2005.11.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A sulphated polysaccharide (SP-2a) from the brown alga Sargassum patens (Kütz.) Agardh (Sargassaceae) was found to significantly inhibit the in vitro replication of both the acyclovir (ACV)-sensitive and -resistant strains of Herpes simplex virus type 1 (HSV-1), in dose-dependent manners, with 50% inhibitions occurring with 1.5-5.3 microg/ml of the polysaccharide. SP-2a exhibited extracellular virucidal activity only against the ACV-sensitive strains, but not the resistant strain, at the concentration of 100 microg/ml. The strongest antiviral activities against the different strains of HSV-1 were observed when this polysaccharide was present during and after adsorption of the virus to host cells. The inhibitory effect of SP-2a on virus adsorption occurred dose-dependently in all the HSV-1 strains tested, and the adsorption of the ACV-resistant DM2.1 strain was reduced by 81.9% (relative to control) with 4 microg/ml of the polysaccharide. This study clearly demonstrated that the antiviral mode of action of SP-2a is mediated mainly by inhibiting virus attachment to host cells, and this sulphated polysaccharide might have different modes of action against the ACV-sensitive and -resistant strains of HSV-1.
Collapse
Affiliation(s)
- W Zhu
- Department of Biology, The Chinese University of Hong Kong, Shatin, Hong Kong, and Laboratory of Lung Cancer Molecular Biology, Cancer Center, West China Hospital, Sichuan University, 37 Guoxue Lane, Sichuan 610041, China
| | | | | | | | | |
Collapse
|
19
|
Li XM, Shi YH, Wang F, Wang HS, Le GW. In vitro free radical scavenging activities and effect of synthetic oligosaccharides on antioxidant enzymes and lipid peroxidation in aged mice. J Pharm Biomed Anal 2006; 43:364-70. [PMID: 16876976 DOI: 10.1016/j.jpba.2006.06.041] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2006] [Revised: 06/16/2006] [Accepted: 06/20/2006] [Indexed: 01/22/2023]
Abstract
In this study we synthesized oligosaccharides using glucose as reactant via a route assisted by microwave irradiation and evaluated their antioxidant activity in vivo and in vitro. The results show that the oligosaccharides exhibited antioxidant activity in vitro as compared to standard antioxidants such as butylated hydroxytoluene (BHT), and alpha-tocopherol. This antioxidant activity depended on concentration and increased with increasing dose of sample. In addition, increased endogenous lipid peroxidation and decreased total antioxidant capacity (TAOC) were observed in aged mice. Thirty-day intraperitoneal administration of the oligosaccharides significantly decreased the lipid peroxidation in a dose-dependent manner. Oligosaccharides treatment increased TAOC and the activity of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) in all organs tested in aged mice. The present study suggests that the synthetic oligosaccharides possess promising future for their strong free radical scavenging activity. Therefore they can be employed in compensating the decline in TAOC and the activities of antioxidant enzymes and in reducing the risks of lipid peroxidation.
Collapse
Affiliation(s)
- Xin-Ming Li
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, Southern Yangtze University, Wuxi, Jiangsu 214036, PR China
| | | | | | | | | |
Collapse
|
20
|
García CC, Djavani M, Topisirovic I, Borden KLB, Salvato MS, Damonte EB. Arenavirus Z protein as an antiviral target: virus inactivation and protein oligomerization by zinc finger-reactive compounds. J Gen Virol 2006; 87:1217-1228. [PMID: 16603524 PMCID: PMC2423342 DOI: 10.1099/vir.0.81667-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Several disulfide-based and azoic compounds have shown antiviral and virucidal properties against arenaviruses in virus yield-inhibition and inactivation assays, respectively. The most effective virucidal agent, the aromatic disulfide NSC20625, was able to inactivate two strains of the prototype arenavirus species Lymphocytic choriomeningitis virus (LCMV). Inactivated viral particles retained the biological functions of the virion envelope glycoproteins in virus binding and uptake, but were unable to perform viral RNA replication. Furthermore, in inactivated virions, the electrophoretic profile of the Z protein was altered when analysed under non-reducing conditions, whereas the patterns of the proteins NP and GP1 remained unaffected. Treatment of a recombinant LCMV Z protein with the virucidal agents induced unfolding and oligomerization of Z to high-molecular-mass aggregates, probably due to metal-ion ejection and the formation of intermolecular disulfide bonds through the cysteine residues of the Z RING finger. NSC20625 also exhibited antiviral properties in LCMV-infected cells without affecting other cellular RING-motif proteins, such as the promyelocytic leukaemia protein PML. Altogether, the investigations described here illustrate the potential of the Z protein as a promising target for therapy and the prospects of the Z-reactive compounds to prevent arenavirus dissemination.
Collapse
Affiliation(s)
- Cybele C. García
- Laboratory of Virology, Department of Biological Chemistry, School of Sciences, University of Buenos Aires, Ciudad Universitaria, Pabellón 2, Piso 4, 1428 Buenos Aires, Argentina
| | - Mahmoud Djavani
- Institute of Human Virology, University of Maryland Biotechnology Center, Baltimore, MD 21201, USA
| | - Ivan Topisirovic
- Institute de Recherche en Immunologie et en Cancerologie, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | - Katherine L. B. Borden
- Institute de Recherche en Immunologie et en Cancerologie, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | - María S. Salvato
- Institute of Human Virology, University of Maryland Biotechnology Center, Baltimore, MD 21201, USA
| | - Elsa B. Damonte
- Laboratory of Virology, Department of Biological Chemistry, School of Sciences, University of Buenos Aires, Ciudad Universitaria, Pabellón 2, Piso 4, 1428 Buenos Aires, Argentina
| |
Collapse
|
21
|
Park HJ, Kurokawa M, Shiraki K, Nakamura N, Choi JS, Hattori M. Antiviral activity of the marine alga Symphyocladia latiuscula against herpes simplex virus (HSV-1) in vitro and its therapeutic efficacy against HSV-1 infection in mice. Biol Pharm Bull 2006; 28:2258-62. [PMID: 16327161 DOI: 10.1248/bpb.28.2258] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The antiviral activities of extracts from 5 species of marine algae collected at Haeundae (Pusan, Korea), were examined using plaque reduction assays. Although the activity of a methanol (MeOH) extract of Sargassum ringoldianum (Sargassaceae) was the most potent against several types of viruses, it was also cytotoxic. A MeOH extract of Symphyocladia latiuscula (Rhodomelaceae) and its fractions exhibited antiviral activities against acyclovir (ACV) and phosphonoacetic acid (PAA)-resistant (AP(r)) herpes simplex type 1 (HSV-1), thymidine kinase (TK(-)) deficient HSV-1 and wild type HSV-1 in vitro without cytotoxicity. The major component, 2,3,6-tribromo-4,5-dihydroxybenzyl methyl ether (TDB) of a CH(2)Cl(2)-soluble fraction was active against wild type HSV-1, as well as AP(r) HSV-1 and TK(-) HSV-1 (IC(50) values of 5.48, 4.81 and 23.3 microg/ml, respectively). The therapeutic effectiveness of the MeOH extract and TDB from S. latiuscula was further examined in BALB/c mice that were cutaneously infected with HSV-1 strain 7401H. Three daily oral administrations of the MeOH extract and TDB significantly delayed the appearance of score 2 skin lesions (local vesicles) and limited the development of further score 6 (mild zosteriform) lesions in infected mice without toxicity compared with controls. In addition, TDB suppressed virus yields in the brain and skin. Therefore TDB should be a promising anti HSV agent.
Collapse
Affiliation(s)
- Hye-Jin Park
- Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, Pusan 608-737, Korea
| | | | | | | | | | | |
Collapse
|
22
|
Matsuhiro B, Conte AF, Damonte EB, Kolender AA, Matulewicz MC, Mejías EG, Pujol CA, Zúñiga EA. Structural analysis and antiviral activity of a sulfated galactan from the red seaweed Schizymenia binderi (Gigartinales, Rhodophyta). Carbohydr Res 2006; 340:2392-402. [PMID: 16125685 DOI: 10.1016/j.carres.2005.08.004] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2005] [Revised: 08/10/2005] [Accepted: 08/11/2005] [Indexed: 11/19/2022]
Abstract
Aqueous extraction of gametophytic Schizymenia binderi afforded a polysaccharide composed of galactose and sulfate groups in a molar ratio of 1.0:0.89 together with uronic acids (6.8 wt%) and minor amounts of other neutral sugars. Alkali-treatment of the polysaccharide afforded a polysaccharide devoid of 3,6-anhydrogalactose. 13C NMR spectroscopy of the desulfated alkali-treated polysaccharide showed a backbone structure of alternating 3-linked beta-D-galactopyranosyl and 4-linked alpha-galactopyranosyl units that are predominantly of the D-configuration and partly of the L-configuration. Methylation, ethylation and NMR spectroscopic studies of the alkali-treated polysaccharide indicated that the sulfate groups are located mainly at positions O-2 of 3-linked beta-D-galactopyranosyl residue and at position O-3 of 4-linked-alpha-galactopyranosyl residues, the latter is partially glycosylated at position O-2. The sulfated galactan from S. binderi exhibited highly selective antiviral activity against Herpes simplex virus types 1 and 2, with selectivity indices (ratio cytotoxicity/antiviral activity) >1000 for all assayed virus strains. This compound was shown to interfere with the initial adsorption of viruses to cells.
Collapse
Affiliation(s)
- Betty Matsuhiro
- Departamento de Ciencias Químicas, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40, Santiago 33, Chile.
| | | | | | | | | | | | | | | |
Collapse
|
23
|
|
24
|
Jiang YP, Guo XK, Tian XF. Synthesis and NMR structural analysis of O-succinyl derivative of low-molecular-weight κ-carrageenan. Carbohydr Polym 2005. [DOI: 10.1016/j.carbpol.2005.05.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
25
|
Talarico LB, Zibetti RGM, Faria PCS, Scolaro LA, Duarte MER, Noseda MD, Pujol CA, Damonte EB. Anti-herpes simplex virus activity of sulfated galactans from the red seaweeds Gymnogongrus griffithsiae and Cryptonemia crenulata. Int J Biol Macromol 2005; 34:63-71. [PMID: 15178011 DOI: 10.1016/j.ijbiomac.2004.03.002] [Citation(s) in RCA: 136] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
This study presents the chemical composition and antiviral activity against herpes simplex virus type 1 (HSV-1) and 2 (HSV-2) of sulfated galactan crude extracts and main fractions obtained from two red seaweeds collected in Brazil, Gymnogongrus griffithsiae and Cryptonemia crenulata. Most of the eighteen tested products, including homogeneous kappa/iota/nu carrageenan and DL-galactan hybrid, exhibited antiherpetic activity with inhibitory concentration 50% (IC50) values in the range 0.5-5.6 microg/ml, as determined in a virus plaque reduction assay in Vero cells. The galactans lacked cytotoxic effects and showed a broad spectrum of antiviral activity against HSV-1 and HSV-2. No direct virus inactivation was observed after virion treatment with the galactans. The mode of action of these compounds could be mainly ascribed to an inhibitory effect on virus adsorption. Most importantly, a significant protection against a murine vaginal infection with HSV-2 was afforded by topical treatment with the sulfated galactans.
Collapse
Affiliation(s)
- Laura B Talarico
- Laboratorio de Virología, Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, 1428 Buenos Aires, Argentina
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Liu H, Geng M, Xin X, Li F, Zhang Z, Li J, Ding J. Multiple and multivalent interactions of novel anti-AIDS drug candidates, sulfated polymannuronate (SPMG)-derived oligosaccharides, with gp120 and their anti-HIV activities. Glycobiology 2004; 15:501-10. [PMID: 15616125 DOI: 10.1093/glycob/cwi031] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Sulfated polymannuronate (SPMG), a novel anti-AIDS drug candidate, combats HIV-1 infection mainly by binding to gp120 protein with high affinity. To explore the structural basis of this anti-HIV-1 action, size-defined oligosaccharides were prepared by semi-synthesis or separated from native SPMG. In this study, a series of homogeneously sized SPMG fragments are evaluated for their capacity to bind rgp120 using surface plasmon resonance (SPR) analysis. The minimum SPMG fragment size that interacts with rgp120 is a hexasaccharide. Additionally, binding capacity increases with the molecular size of oligosaccharides, with the affinity of large fragments (> or = 15-16 saccharides) approaching that of full-sized SPMG. Competitive inhibition and stoichiometric analyses disclose that SPMG oligos bind to multiple binding sites on gp120. Sugar chains longer than 15-16 saccharide residues (SPMG) display multivalent interactions, with one sugar chain binding to two or three gp120 molecules. Consistent with binding data, a positive correlation exists between the size of SPMG oligosaccharides and their anti-HIV activity. The octasaccharide is established to be the minimal active fragment inhibiting syncytium formation and lowering the P24 core antigen level in HIV-IIIB-infected CEM cells. Alternatively, about 50% anti-HIV activity was observed for 15-16 saccharides, whereas a 19-20-saccharide fragment displayed anti-HIV activity equivalent to native SPMG. The structures of the unique minimum hexasaccharide specifically recognized by gp120 and the minimum octasaccharide combating HIV-IIIB infection were representatively structured as [ManA (2s)beta1-4 ManA(2s/3s)]n.
Collapse
Affiliation(s)
- Haiying Liu
- Department of Pharmacology, Marine Drug and Food Institute, Ocean University of China, Qingdao 266003, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
27
|
Liu J, Yang F, Ye LB, Yang XJ, Timani KA, Zheng Y, Wang YH. Possible mode of action of antiherpetic activities of a proteoglycan isolated from the mycelia of Ganoderma lucidum in vitro. JOURNAL OF ETHNOPHARMACOLOGY 2004; 95:265-272. [PMID: 15507347 DOI: 10.1016/j.jep.2004.07.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2003] [Revised: 06/12/2004] [Accepted: 07/17/2004] [Indexed: 05/24/2023]
Abstract
A bioactive fraction (GLPG) was extracted and purified from the mycelia of Ganoderma lucidum by EtOH precipitation and DEAE-cellulose column chromatography. GLPG was a proteoglycan and had a carbohydrate:protein ratio of 10.4:1. Its antiviral activities against herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2) were investigated by the cytopathic effect (CPE) inhibition assay in cell culture. This kind of polysaccharide inhibited the development of the cytopathic effect in dose-dependent manner in HSV-infected cells, moreover did not show any cytotoxic effects on cells even when a concentration was as high as 2000 microg/ml. In order to study the possible mode of action of the antiviral activity of GLPG, cells were treated with GLPG before, during and after infection, and the viral titers in the supernatant of cell culture 48 h post-infection were tested by TCID(50) assay. The antiviral effects in pre-treated and treated during virus infection with GLPG were more remarkable than the treatment of post-infection. Although the precise mechanism has yet to be defined, our work suggested that GLPG inhibits viral replication by interfering with the early events of viral adsorption and entry into target cells. Thus, this proteoglycan seems to be a potential candidate for anti-HSV agents.
Collapse
Affiliation(s)
- Jing Liu
- Key laboratory of Virology, Ministry of Education, College of Life science, Wuhan University, Wuhan 430072, Hubei, China
| | | | | | | | | | | | | |
Collapse
|
28
|
Zhu W, Chiu LCM, Ooi VEC, Chan PKS, Ang PO. Antiviral property and mode of action of a sulphated polysaccharide from Sargassum patens against herpes simplex virus type 2. Int J Antimicrob Agents 2004; 24:279-83. [PMID: 15325432 DOI: 10.1016/j.ijantimicag.2004.02.022] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2004] [Accepted: 02/16/2004] [Indexed: 11/24/2022]
Abstract
A sulphated polysaccharide (SP2) was isolated from the brown alga Sargassum patens. SP2 inhibited the replication of herpes simplex virus type 2 (HSV-2) dose-dependently by 38.5-96.1% of the control level, after incubations with 0.78-12.5 microg/ml of the polysaccharide. SP2 exhibited extracellular virucidal activity only in high concentrations (>/=12.5 microg/ml) but significantly inhibited the virus attachment to its host cells by 45.1%, at concentration as low as 1 microg/ml. All the results from this study suggested that the antiviral mode of action of SP2 could be ascribed to the inhibition of virus adsorption, which is different from that of the current drug of choice acyclovir.
Collapse
Affiliation(s)
- W Zhu
- Department of Biology, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | | | | | | | | |
Collapse
|
29
|
Dubes A, Degobert G, Fessi H, Parrot-Lopez H. Synthesis and characterisation of sulfated amphiphilic alpha-, beta- and gamma-cyclodextrins: application to the complexation of acyclovir. Carbohydr Res 2004; 338:2185-93. [PMID: 14553979 DOI: 10.1016/s0008-6215(03)00356-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The synthesis of sulfated amphiphilic alpha-, beta- and gamma-cyclodextrins was achieved according to the standard protection-deprotection procedure. The formation of inclusion complexes between the amphiphilic alpha-, beta- and gamma-cyclodextrins and an antiviral molecule, acyclovir (ACV) was investigated by UV-visible spectroscopy (UV-Vis) and electrospray ionisation mass spectrometry (ESIMS). UV-Vis spectroscopy allowed determination of the stoichiometry and stability constants of complexes, whereas ESIMS, a soft ionisation technique, allowed the detection of the inclusion complexes. The results showed that the non-sulfated amphiphilic cyclodextrins exhibit a 1:2 stoichiometry with acyclovir, while sulfated amphiphilic cyclodextrins, except gamma-cyclodextrin, exhibit a 1:1 stoichiometry indicating the loss of one interaction site. Non-covalent interactions between acyclovir and non-sulfated amphiphilic cyclodextrins appear to take place both in the cavity of the cyclodextrin and inside the hydrophobic zone generated by alkanoyl chains. In contrast, in the case of sulfated amphiphilic cyclodextrins, the interactions appear to involve only the hydrophobic region of the alkanoyl chains.
Collapse
Affiliation(s)
- Alix Dubes
- Laboratoire de Méthodologies de Synthèse et Molécules Bioactives, F-69622 Villeurbanne, France
| | | | | | | |
Collapse
|
30
|
Briolant S, Garin D, Scaramozzino N, Jouan A, Crance JM. In vitro inhibition of Chikungunya and Semliki Forest viruses replication by antiviral compounds: synergistic effect of interferon-alpha and ribavirin combination. Antiviral Res 2004; 61:111-7. [PMID: 14670584 DOI: 10.1016/j.antiviral.2003.09.005] [Citation(s) in RCA: 174] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Chikungunya virus (CHIKV) and Semliki Forest virus (SFV) were used in our laboratory to screen active antiviral compounds against viruses of the Alphavirus genus. Antiviral activity was estimated by the reduction of the cytopathic effect of each alphavirus on infected Vero cells and by virus titer reduction. Cytotoxicity was evaluated by determining the inhibition of Trypan blue exclusion in confluent cell cultures and by the evaluation of the inhibitory effect on cell growth. With CHIKV and SFV, the selectivity indices of human recombinant interferon-alpha and iota-carrageenan were much higher than that of ribavirin, which has been previously investigated for its inhibitory effect on alphavirus infections. Compared to ribavirin, 6-azauridine was more effective against CHIKV and showed a similar antiviral activity against SFV. IFN-alpha2b, glycyrrhizin, 6-azauridine, and ribavirin caused a concentration-dependent reduction in the virus yield with CHIKV and SFV. Moreover, the combination of IFN-alpha2b and ribavirin had a subsynergistic antiviral effect on these two alphaviruses and should be evaluated for the treatment of these infections.
Collapse
Affiliation(s)
- S Briolant
- Département de biologie des agents transmissibles, Centre de Recherches du Service de Santé des Armées, BP 87, 24, av. des Maquis du Grésivaudan, 38702 Cedex, La Tronche, France.
| | | | | | | | | |
Collapse
|
31
|
Dubes A, Parrot-Lopez H, Shahgaldian P, Coleman AW. Interfacial interactions between amphiphilic cyclodextrins and physiologically relevant cations. J Colloid Interface Sci 2003; 259:103-11. [PMID: 12651138 DOI: 10.1016/s0021-9797(02)00067-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The compression isotherms of a series of amphiphilic cyclodextrins, formed (a) by acylation at the secondary hydroxyl face and (b) by acylation accompanied by varying degrees of sulfatation (DS) at the primary hydroxyl face (DS=0, 4, and 7), have been studied on subphases of pure water and of water containing NaCl, KCl, MgCl(2), and CaCl(2) at inter- and extracellular concentrations. The formation of solid lipid nanoparticles (SLNs) by two of the molecules has been observed, while these do not aggregate at concentrations of monovalent salts up to 150 mM for the sulfated derivative. In the presence of divalent salts one of these with a DS=0 for sulfatation degree flocculates at divalent salt concentrations below 0.1 mM while the other with a DS=4 flocculates at Mg(2+) concentration above 5 mM and a Ca(2+) concentration above 3 mM. AFM noncontact mode imaging has been carried out, in air, for the SLNs deposited on mica.
Collapse
Affiliation(s)
- Alix Dubes
- Synthèse, Reconnaissance, Organisation Moléculaire et Biomoléculaire, CNRS UMR 5078, Université Claude Bernard Lyon 1, Bât J. Raulin, 43, Bd. du 11 novembre 1918, 69622 Villeurbanne cedex, France
| | | | | | | |
Collapse
|
32
|
Zhu W, Ooi VEC, Chan PKS, Ang PO. Isolation and characterization of a sulfated polysaccharide from the brown alga Sargassum patens and determination of its anti-herpes activity. Biochem Cell Biol 2003; 81:25-33. [PMID: 12683633 DOI: 10.1139/o02-169] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Bioactivity-guided fractionation of the hot water extract from the brown alga Sargassun patens led to the isolation of a polysaccharide as an antiviral component against herpes simplex viruses which are the cause of cold sores (HSV-1) and genital herpes (HSV-2). The polysaccharide contained a sulfur group that could be present as a sulfate ester. It is thus a sulfated polysaccharide with a molecular mass of about 424 kDa, and is designated SP-2a. Gas chromatographic assay showed that the polysaccharide consisted of fucose, galactose, mannose, xylose, glucose, and galactosamine. The fucose is the major constituent sugar (35.3%), followed by galactose (18.4%). The 50% effective concentration (EC50) against HSV-2, HSV-1, and HSV-1 acyclovir resistant strain was 1.3, 5.5, and 4.1 microg/mL, respectively. The 50% cytotoxic concentration (CC50) of SP-2a on the growth of normal Vero cell line was more than 4000 microg/mL. Therefore SP-2a of S. patens may be a potent agent for treating HSV infections.
Collapse
Affiliation(s)
- Wen Zhu
- Department of Biology, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | | | | | | |
Collapse
|
33
|
Damonte EB, Coto CE. Treatment of arenavirus infections: from basic studies to the challenge of antiviral therapy. Adv Virus Res 2003; 58:125-55. [PMID: 12205778 DOI: 10.1016/s0065-3527(02)58004-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elsa B Damonte
- Laboratorio de Virología, Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argenting
| | | |
Collapse
|
34
|
Boussard C, Doyle VE, Mahmood N, Klimkait T, Pritchard M, Gilbert IH. Design, synthesis and evaluation of peptide libraries as potential anti-HIV compounds, via inhibition of gp120/cell membrane interactions, using the gp120/cd4/fab17 crystal structure. Eur J Med Chem 2002; 37:883-90. [PMID: 12446047 DOI: 10.1016/s0223-5234(02)01412-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The crystal structure of a gp120/CD4/Fab17b complex was analysed leading to the design of several peptide libraries in the hope of obtaining novel gp120/cell membrane receptor interaction inhibitors, especially inhibitors of gp120/CD4 and gp120/chemokine receptor interactions. Syntheses of tri- and tetra- and pentapeptides were performed via a solid phase synthesis methodology using a Rink Amide MBHA resin and a Fmoc strategy giving C-terminal amide form peptides. Compounds were assayed against C8166 cells infected by HIV-1 IIIB and screened using a gp120 binding assay and the FIGS reporter gene assay.
Collapse
Affiliation(s)
- Cyrille Boussard
- Welsh School of Pharmacy, Cardiff University, Redwood Building, King Edward VII Avenue, CF10 3XF, Cardiff, UK
| | | | | | | | | | | |
Collapse
|
35
|
Carlucci MJ, Scolaro LA, Damonte EB. Herpes simplex virus type 1 variants arising after selection with an antiviral carrageenan: lack of correlation between drug susceptibility and syn phenotype. J Med Virol 2002; 68:92-8. [PMID: 12210435 DOI: 10.1002/jmv.10174] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Natural carrageenans of diverse structural types isolated from the red seaweed Gigartina skottsbergii were recently identified as potent and selective inhibitors of herpes simplex virus types 1 and 2 (HSV-1 and -2). The mu/nu-carrageenan 1C3 was tested in vitro for its ability to select resistant variants. After serial passages of HSV-1 strain F in Vero cells in the presence of increasing concentrations of 1C3, viruses emerged that were approximately 2- to 10-fold more resistant to 1C3 inhibition than parental virus; these viruses formed large plaques with an altered syncytial phenotype (1C3-syn). Plaque-purified syncytial variants isolated from passages 13 and 14 have shown variable levels of resistance to 1C3, as well as to the other antiviral carrageenans isolated from G. skottsbergii and to other sulfated polysaccharides with known antiviral activity, such as heparin and dextran sulfate 8000, but all the clones were susceptible to acyclovir. The syn phenotype was not related to polysaccharide resistance. All the 1C3-syn variants formed large syncytia in Vero and CV-1 cells but did not induce fusion in other cell types. The growth efficiency in Vero cells, as well as the virulence for mice by intracerebral or intraperitoneal inoculation of 1C3-syn variants, showed no significant alterations in comparison with the parental virus. The syncytial properties were not affected by cyclosporine or melittin, suggesting that an alteration on glycoprotein gB could be responsible for the syn phenotype induced by 1C3.
Collapse
Affiliation(s)
- M J Carlucci
- Laboratorio de Virología, Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina
| | | | | |
Collapse
|
36
|
Beljaars L, Floris R, Berkhout B, Smit C, Meijer DKF, Molema G. The influence of charge clustering on the anti-HIV-1 activity and in vivo distribution of negatively charged albumins. Biochem Pharmacol 2002; 63:1663-73. [PMID: 12007569 DOI: 10.1016/s0006-2952(02)00912-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The substitution of human serum albumin with negatively charged molecules, such as succinic acid (Suc-HSA) or aconitic acid (Aco-HSA), resulted in proteins with potent anti-HIV activities, by binding to viral gp120 (V3 loop). The aim of the present study was to investigate whether the distribution of negative charges on the albumin backbone influences the anti-HIV activity. Therefore, we prepared albumins with clusters of negatively charged groups by coupling of heparin. The effects of this substitution on anti-HIV activity, in vivo distribution and the protein structure as compared to random succinylation were assessed. In vitro studies indicated that HSA-modified with heparin 6 or 13 kD displayed anti-HIV activity (IC50=660 and 37 nM, respectively) and exhibited affinity for gp120-V3 loop, although the activity was lower than that of Suc-HSA. Combined derivatization of HSA with heparin 13 kD and aconitic acid groups resulted in significantly increased inhibitory actions (IC50=2.8 nM). Structural analysis showed that modification of HSA with heparin did not lead to extensive unfolding of the protein, meaning that these modified proteins were still globular in structure. In contrast, succinylation of HSA resulted in a highly randomly coiled conformation. Dynamic light scattering experiments revealed that, at neutral pH, the heparin fragments attached to the protein were wrapped around the molecule rather than sticking out into the solution. In conclusion, coupling of sufficient clustered negative charges, by coupling of Hep-fragments, on HSA resulted in a clear anti-HIV activity of the protein. Yet, random distribution of anionic groups in the albumin seemed more optimal for in vitro anti-HIV activity. The higher plasma and lymphatic concentrations of Hep-HSA compared to Suc-HSA seemed more favorable for an anti-HIV activity in vivo.
Collapse
Affiliation(s)
- Leonie Beljaars
- Department of Pharmacokinetics and Drug Delivery, University Center for Pharmacy, Groningen University Institute for Drug Exploration (GUIDE), Ant. Deusinglaan 1, 9713 AV, Groningen, The Netherlands.
| | | | | | | | | | | |
Collapse
|
37
|
Pujol CA, Estevez JM, Carlucci MJ, Ciancia M, Cerezo AS, Damonte EB. Novel DL-galactan hybrids from the red seaweed Gymnogongrus torulosus are potent inhibitors of herpes simplex virus and dengue virus. Antivir Chem Chemother 2002; 13:83-9. [PMID: 12238532 DOI: 10.1177/095632020201300202] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A novel series of DL-galactan hybrids extracted from the red seaweed Gymnogongrus torulosus, was evaluated for its in vitro antiviral properties against herpes simplex virus type 2 (HSV-2) and dengue virus 2 (DEN-2). These compounds were very active against both viruses with inhibitory concentration 50% (IC50) values in the range 0.6-16 microg/ml for HSV-2 and 0.19-1.7 microg/ml for DEN-2, respectively, as determined in a virus plaque reduction assay in Vero cells. The DL-galactans lacked of cytotoxic effects, on stationary as well as on actively dividing cells, and anticoagulant properties. Some of the compounds showed a variable level of direct inactivating effect on both virions, with virucidal concentration 50% values exceeding the IC50s obtained by plaque reduction assay. Full inhibitory activity was achieved when the galactans were present during virus adsorption period, suggesting that the mode of action of these compounds is an interference in the binding of the surface envelope glycoprotein with the cell receptor.
Collapse
Affiliation(s)
- C A Pujol
- Departamento de Quimica Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Argentina
| | | | | | | | | | | |
Collapse
|
38
|
Dubes A, Bouchu D, Lamartine R, Parrot-Lopez H. An efficient regio-specific synthetic route to multiply substituted acyl-sulphated β-cyclodextrins. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01992-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
39
|
Rusnati M, Urbinati C, Caputo A, Possati L, Lortat-Jacob H, Giacca M, Ribatti D, Presta M. Pentosan polysulfate as an inhibitor of extracellular HIV-1 Tat. J Biol Chem 2001; 276:22420-5. [PMID: 11304529 DOI: 10.1074/jbc.m010779200] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
HIV-1 Tat protein, released from HIV-infected cells, may act as a pleiotropic heparin-binding growth factor. From this observation, extracellular Tat has been implicated in the pathogenesis of AIDS and of AIDS-associated pathologies. Here we demonstrate that the heparin analog pentosan polysulfate (PPS) inhibits the interaction of glutathione S-transferase (GST)-Tat protein with heparin immobilized to a BIAcore sensor chip. Competition experiments showed that Tat-PPS interaction occurs with high affinity (K(d) = 9.0 nm). Also, GST.Tat prevents the binding of [(3)H]heparin to GST.Tat immobilized to glutathione-agarose beads. In vitro, PPS inhibits GST.Tat internalization and, consequently, HIV-1 long terminal repeat transactivation in HL3T1 cells. Also, PPS inhibits cell surface interaction and mitogenic activity of GST.Tat in murine adenocarcinoma T53 Tat-less cells. In all assays, PPS exerts its Tat antagonist activity with an ID(50) equal to approximately 1.0 nm. In vivo, PPS inhibits the neovascularization induced by GST.Tat or by Tat-overexpressing T53 cells in the chick embryo chorioallantoic membrane. In conclusion, PPS binds Tat protein and inhibits its cell surface interaction, internalization, and biological activity in vitro and in vivo. PPS may represent a prototypic molecule for the development of novel Tat antagonists with therapeutic implications in AIDS and AIDS-associated pathologies, including Kaposi's sarcoma.
Collapse
Affiliation(s)
- M Rusnati
- Department of Biomedical Sciences and Biotechnology, School of Medicine, University of Brescia, 25123 Brescia, Italy
| | | | | | | | | | | | | | | |
Collapse
|
40
|
De Clercq E. Vaccinia virus inhibitors as a paradigm for the chemotherapy of poxvirus infections. Clin Microbiol Rev 2001; 14:382-97. [PMID: 11292644 PMCID: PMC88980 DOI: 10.1128/cmr.14.2.382-397.2001] [Citation(s) in RCA: 129] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Poxviruses continue to pose a major threat to human health. Monkeypox is endemic in central Africa, and the discontinuation of the vaccination (with vaccinia virus) has rendered most humans vulnerable to variola virus, the etiologic agent of smallpox, should this virus be used in biological warfare or terrorism. However, a large variety of compounds have been described that are potent inhibitors of vaccinia virus replication and could be expected to be active against other poxviruses as well. These compounds could be grouped in different classes: (i) IMP dehydrogenase inhibitors (e.g., EICAR); (ii) SAH hydrolase inhibitors (e.g., 5'-noraristeromycin, 3-deazaneplanocin A, and various neplanocin A derivatives); (iii) OMP decarboxylase inhibitors (e.g., pyrazofurin) and CTP synthetase inhibitors (e.g., cyclopentenyl cytosine); (iv) thymidylate synthase inhibitors (e.g., 5-substituted 2'-deoxyuridines); (v) nucleoside analogues that are targeted at viral DNA synthesis (e.g., Ara-A); (vi) acyclic nucleoside phosphonates [e.g., (S)-HPMPA and (S)-HPMPC (cidofovir)]; and (vii) polyanionic substances (e.g., polyacrylic acid). All these compounds could be considered potential candidate drugs for the therapy and prophylaxis of poxvirus infections at large. Some of these compounds, in particular polyacrylic acid and cidofovir, were found to generate, on single-dose administration, a long-lasting protective efficacy against vaccinia virus infection in vivo. Cidofovir, which has been approved for the treatment of cytomegalovirus retinitis in immunocompromised patients, was also found to protect mice, again when given as a single dose, against a lethal aerosolized or intranasal cowpox virus challenge. In a biological warfare scenario, it would be advantageous to be able to use a single treatment for an individual exposed to an aerosolized poxvirus. Cidofovir thus holds great promise for treating human smallpox, monkeypox, and other poxvirus infections. Anecdotal experience points to the efficacy of cidofovir in the treatment of the poxvirus infections molluscum contagiosum and orf (ecthyma contagiosum) in immunosuppressed patients.
Collapse
Affiliation(s)
- E De Clercq
- Division of Virology and Chemotherapy, Department of Microbiology and Immunology, Rega Institute for Medical Research, K.U. Leuven, B-3000 Leuven, Belgium.
| |
Collapse
|
41
|
|
42
|
Duarte ME, Noseda DG, Noseda MD, Tulio S, Pujol CA, Damonte EB. Inhibitory effect of sulfated galactans from the marine alga Bostrychia montagnei on herpes simplex virus replication in vitro. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2001; 8:53-58. [PMID: 11292240 DOI: 10.1078/0944-7113-00007] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Sulfated polysaccharides exhibit many biological properties such as antiviral and anticoagulant activities. Herein, we report the antiviral activity of sulfated galactans extracted from the red sea-weed Bostrychia montagnei against herpes simplex virus types 1 (strain F and the thymidine kinase-deficient strains Field and B2006) and 2 (strain G). Two crude extracts obtained with cold and hot water as well as some fractions obtained by anion exchange chromatography, inhibited significantly the replication of the different strains of herpesviruses as determined by plaque reduction assays. The inhibitory effect of the compounds studied here took place only when they were added during the adsorption period. They were found to be highly selective antiviral substances, causing no impairment of Vero cell viability. Furthermore, they had no direct inactivating effect on virions by incubation in a virucidal assay. The antiviral activity could be correlated with the molecular weight and sulfate content of the polysaccharides. Although sulfated polysaccharides are generally endowed with anticoagulant properties, the results of the activated partial thromboplastin time and the thrombine time assays indicated that the natural sulfated polysaccharides from Bostrychia montagnei have very low anticoagulant activity, confirming that there is no relation between the antiviral and anticoagulant properties.
Collapse
Affiliation(s)
- M E Duarte
- Departamento de Bioquímica, Universidade Federal do Paraná, Centro Politécnico, Curitiba, Brasil
| | | | | | | | | | | |
Collapse
|
43
|
Kim YS, Eo SK, Oh KW, Lee C, Han SS. Antiherpetic activities of acidic protein bound polysacchride isolated from Ganoderma lucidum alone and in combinations with interferons. JOURNAL OF ETHNOPHARMACOLOGY 2000; 72:451-458. [PMID: 10996285 DOI: 10.1016/s0378-8741(00)00263-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
To investigate antiherpetic activity, an acidic protein bound polysaccharide (APBP) was isolated from carpophores of Ganoderma lucidum. This brownish APBP was isolated from water soluble substances of the carpophores by activity-guided isolation method. APBP was tested for its antiviral activity against herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2) by plaque reduction assay in tissue culture. APBP showed potent antiviral activity against HSV-1 and HSV-2 in Vero cells at its 50% effective concentration (EC(50)) of 300 and 440 microg/ml, respectively. APBP had no cytotoxicity on Vero cells at a concentration of 1x10(4) microg/ml. APBP exhibited a potent antiviral activity with selectivity index (SI) of more than 22.73. The combined antiherpetic effects of APBP with protein antiviral agents, interferon alpha (IFN alpha) and interferon gamma (IFN gamma), were examined on the multiplication of these two strains of herpesviruses in Vero cells by the combination assay. The results of combination assay were evaluated by the combination index (CI) that was calculated by the multiple drug effect analysis. The combinations of APBP with IFN alpha on HSV-1 and HSV-2 showed more potent synergistic effects with CI values of 0.30-0.62 for 50-90% effective levels than those of APBP with IFN gamma with CI values of 0.65-1.10. These results suggest the possibility of developing APBP as a new antiherpetic agent.
Collapse
Affiliation(s)
- Y S Kim
- College of Pharmacy, Chungbuk National University, 361-763, Cheongju, South Korea
| | | | | | | | | |
Collapse
|
44
|
Abstract
A large variety of natural products have been described as anti-HIV agents, and for a portion thereof the target of interaction has been identified. Cyanovirin-N, a 11-kDa protein from Cyanobacterium (blue-green alga) irreversibly inactivates HIV and also aborts cell-to-cell fusion and transmission of HIV, due to its high-affinity interaction with gp120. Various sulfated polysaccharides extracted from seaweeds (i.e., Nothogenia fastigiata, Aghardhiella tenera) inhibit the virus adsorption process. Ingenol derivatives may inhibit virus adsorption at least in part through down-regulation of CD4 molecules on the host cells. Inhibition of virus adsorption by flavanoids such as (-)epicatechin and its 3-O-gallate has been attributed to an irreversible interaction with gp120 (although these compounds are also known as reverse transcriptase inhibitors). For the triterpene glycyrrhizin (extracted from the licorice root Glycyrrhiza radix) the mode of anti-HIV action may at least in part be attributed to interference with virus-cell binding. The mannose-specific plant lectins from Galanthus, Hippeastrum, Narcissus, Epipac tis helleborine, and Listera ovata, and the N-acetylgl ucosamine-specific lectin from Urtica dioica would primarily be targeted at the virus-cell fusion process. Various other natural products seem to qualify as HIV-cell fusion inhibitors: the siamycins [siamycin I (BMY-29304), siamycin II (RP 71955, BMY 29303), and NP-06 (FR901724)] which are tricyclic 21-amino-acid peptides isolated from Streptomyces spp that differ from one another only at position 4 or 17 (valine or isoleucine in each case); the betulinic acid derivative RPR 103611, and the peptides tachyplesin and polyphemusin which are highly abundant in hemocyte debris of the horseshoe crabs Tachypleus tridentatus and Limulus polyphemus, i.e., the 18-amino-acid peptide T22 from which T134 has been derived. Both T22 and T134 have been shown to block T-tropic X4 HIV-1 strains through a specific antagonism with the HIV corecept or CXCR4. A number of natural products have been reported to interact with the reverse transcriptase, i.e., baicalin, avarol, avarone, psychotrine, phloroglucinol derivatives, and, in particular, calanolides (from the tropical rainforest tree, Calophyllum lanigerum) and inophyllums (from the Malaysian tree, Calophyllum inophyllum). The natural marine substance illimaquinone would be targeted at the RNase H function of the reverse transcriptase. Curcumin (diferuloylmethane, from turmeric, the roots/rhizomes of Curcuma spp), dicaffeoylquinic and dicaffeoylt artaric acids, L-chicoric acid, and a number of fungal metabolites (equisetin, phomasetin, oteromycin, and integric acid) have all been proposed as HIV-1 integrase inhibitors. Yet, we have recently shown that L-c hicoric acid owes its anti-HIV activity to a specific interaction with the viral envelope gp120 rather than integrase. A number of compounds would be able to inhibit HIV-1 gene expression at the transcription level: the flavonoid chrysin (through inhibition of casein kinase II, the antibacter ial peptides melittin (from bee venom) and cecropin, and EM2487, a novel substance produced by Streptomyces. (ABSTRACT TRUNCATED)
Collapse
Affiliation(s)
- E De Clercq
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, Belgium.
| |
Collapse
|
45
|
Cáceres PJ, Carlucci MJ, Damonte EB, Matsuhiro B, Zuñiga EA. Carrageenans from chilean samples of Stenogramme interrupta (Phyllophoraceae): structural analysis and biological activity. PHYTOCHEMISTRY 2000; 53:81-86. [PMID: 10656412 DOI: 10.1016/s0031-9422(99)00461-6] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Carrageenans extracted from cystocarpic and tetrasporic Stenogramme interrupta were analysed by chemical and spectroscopic methods. The carrageenan from cystocarpic plants is composed predominantly of 0.5 M KCl-insoluble and 1 M KCl-soluble fractions. The insoluble fraction contained iota-carrageenan as the major component with alpha-carrageenan and pyruvated carrageenan as minor components. The soluble fraction is highly heterogeneous and did not contain the precursors mu- and nu-carrageenans. The polysaccharide from tetrasporic plants is composed of zeta- and lambda-carrageenans, and low sulfated galactans. It is soluble in KCl and partly cyclized by alkaline treatment. The antiviral and anticoagulant properties of the insoluble polysaccharide fraction from cystocarpic S. interrupta and the polysaccharide from tetrasporic S. interrupta are reported the results of which suggest promising antiherpetic activity.
Collapse
Affiliation(s)
- P J Cáceres
- Departamento de Ciencias Químicas, Universidad de Santiago de Chile
| | | | | | | | | |
Collapse
|
46
|
Eo SK, Kim YS, Lee CK, Han SS. Antiviral activities of various water and methanol soluble substances isolated from Ganoderma lucidum. JOURNAL OF ETHNOPHARMACOLOGY 1999; 68:129-136. [PMID: 10624872 DOI: 10.1016/s0378-8741(99)00067-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In order to find antiviral substances from basidiomycetes, two water soluble substances, GLhw and GLlw, and eight methanol soluble substances, GLMe-1-8, were prepared from carpophores of Ganoderma lucidum. These substances were examined for their activities against five strains of pathogenic viruses such as herpes simplex virus types 1 (HSV-1) and 2 (HSV-2), influenza A virus (Flu A) and vesicular stomatitis virus (VSV) Indiana and New Jersey strains in vitro. Antiviral activities were evaluated by the cytopathic effect (CPE) inhibition assay and plaque reduction assay. Five substances, GLhw, GLMe-1, -2, -4 and -7 significantly inhibited the cytopathic effects of HSV and VSV. In the plaque reduction assay, GLhw inhibited plaque formation of HSV-2 with 50% effective concentrations (EC50) of 590 and 580 microg/ml in Vero and HEp-2 cells, and its selectivity indices (SI) were 13.32 and 16.26. GLMe-4 did not exhibit cytotoxicity up to 1000 microg/ml, while it exhibited potent antiviral activity on the VSV New Jersey strain with an SI of more than 5.43. These results indicate the possibility of development of antiviral agents from basidiomycetous fungi.
Collapse
Affiliation(s)
- S K Eo
- College of Pharmacy, Chungbuk National University, Cheongju, South Korea
| | | | | | | |
Collapse
|
47
|
Eo SK, Kim YS, Lee CK, Han SS. Antiherpetic activities of various protein bound polysaccharides isolated from Ganoderma lucidum. JOURNAL OF ETHNOPHARMACOLOGY 1999; 68:175-181. [PMID: 10624876 DOI: 10.1016/s0378-8741(99)00086-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
To investigate antiherpetic substances from Ganoderma lucidum, various protein bound polysaccharides, GLhw, GLhw-01, GLhw-02, GLhw-03, were isolated by activity-guided isolation from water soluble substances of the carpophores. These substances were examined for their antiviral activities against herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2) by plaque reduction assay in vitro. Among them, the acidic protein bound polysaccharide, GLhw-02 of a brownish substance, exhibited the most potent antherpetic activity with 50% effective concentrations (EC50) of 300 approximately 520 microg/ml in Vero and HEp-2 cells, and its selectivity indices (SI) were more than 20. GLhw-02 was identified to consist mainly of polysaccharide (approximately 40.6%) and protein (approximately 7.80%) by anthrone test and Lowry-Folin test, and showed the usual molar ratio (C:H:O = 1:2:1) of carbohydrates by elemental analysis. These results suggest that GLhw-02 possesses the possibility of being developed from a new antiherpetic agent.
Collapse
Affiliation(s)
- S K Eo
- College of Pharmacy, Chungbuk National University, Cheongju, South Korea
| | | | | | | |
Collapse
|
48
|
Feldman SC, Reynaldi S, Stortz CA, Cerezo AS, Damont EB. Antiviral properties of fucoidan fractions from Leathesia difformis. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 1999; 6:335-40. [PMID: 11962540 DOI: 10.1016/s0944-7113(99)80055-5] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Three fractions of fucoidans isolated from the brown seaweed Leathesia difformis (Ee, Ec and Ea) were found to be selective antiviral agents against herpes simplex virus (HSV) types 1 and 2 and human cytomegalovirus. Fraction Ea was the most active, with IC50 values in the range 0.5-1.9 microg/ml without affecting cell viability at concentrations up to 400 microg/ml. The antiherpetic activity of Ea was assessed by three different methods, plaque reduction, inhibition of virus yield and prevention of HSV-2 induced shut-off of cell protein synthesis, demonstrating that the inhibitory effect was independent of the antiviral assay and the multiplicity of infection. The mode of action of Ea could be ascribed to an inhibitory action on virus adsorption. The fucoidans did not inhibit the blood coagulation process even at concentrations exceeding more than 100 times the IC50 value.
Collapse
Affiliation(s)
- S C Feldman
- Departamento de Química Orgánica-CIHIDECAR, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Argentina
| | | | | | | | | |
Collapse
|
49
|
Carlucci MJ, Ciancia M, Matulewicz MC, Cerezo AS, Damonte EB. Antiherpetic activity and mode of action of natural carrageenans of diverse structural types. Antiviral Res 1999; 43:93-102. [PMID: 10517311 DOI: 10.1016/s0166-3542(99)00038-8] [Citation(s) in RCA: 102] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The lambda-carrageenan 1T1, the kappa/iota-carrageenan 1C1 and the mu/nu-type 1C3, isolated from the red seaweed Gigartina skottsbergii, proved to be potent and selective inhibitors of herpes simplex virus (HSV) types 1 and 2. The antiviral IC50 values determined by virus yield inhibition assay in different cell lines ranged from 0.4 to 3.3 microg/ml, and no cytotoxic effects, measured by trypan blue exclusion on stationary or proliferating cells, tetrazolium salt method or cell protein synthesis, were observed. Time of addition and attachment studies suggested that the main target for antiviral action of the three carrageenans was virus adsorption, whereas no effect on virus internalization, or early or late protein synthesis was detected. However, the lambda-carrageenan 1T1 was still significantly inhibitory when added any time after adsorption. The pretreatment of virions with the carrageenans showed that 1C1 and 1C3 lacked direct inactivating effect at concentrations near the antiviral IC50 but 1T1 exerted virucidal action. The cyclization of 1T1 to afford the derivative 1T1T1 maintained the antiviral activity but eliminated the virucidal properties. Thus, the structure of 1T1 seems to be responsible for its differential behavior from 1C1 and 1C3, probably allowing a more stable binding to HSV, leading to virion inactivation. In contrast, 1C1 and 1C3 fail to bind with high affinity to virus alone, but are able to interfere with the interaction between HSV particles and the cell.
Collapse
Affiliation(s)
- M J Carlucci
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Argentina
| | | | | | | | | |
Collapse
|
50
|
Kuipers ME, Swart PJ, Witvrouw M, Esté JA, Reymen D, De Clercq E, Meijer DK. Anti-HIV-1 activity of combinations and covalent conjugates of negatively charged human serum albumins (NCAs) and AZT. J Drug Target 1999; 6:323-35. [PMID: 10342381 DOI: 10.3109/10611869908996840] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Negatively charged albumins (NCAs, with the prototypes Suc-HSA and Aco-HSA), modified proteins with a potent anti-HIV-1 activity in the nanomolar concentration range, were studied for several aspects of their antiviral mechanism. In addition we investigated the antiviral activity of combinations and covalent conjugates of these NCAs and the reverse transcriptase inhibitor AZT. Addition of NCAs to HIV-1-infected target cells in time-of-addition experiments could be delayed for 30 min after infection before significant loss of activity occurred. Syncytium formation of HIV-infected and uninfected T-cells was inhibited by the NCAs at concentrations of 1-4 microg/ml. The gp120-mediated virus/cell binding, however, was only inhibited by the NCAs at a 10-fold higher concentrations. The combined data are compatible with a preferential influence on virus/cell fusion. A subsynergistic activity against HIV-1 was observed with the non-covalent mixture of Aco-HSA and AZT. When AZT was covalently coupled to the NCAs, and added one hour after infection of the target cells, the anti-HIV-1 activity of NCA-AZTMP was diminished by only 2-6-fold, while this was diminished at least 120-fold for the NCAs. Furthermore the addition of NCA-AZTMP could be delayed up to at least 3 h after infection without loss of antiviral activity. It is concluded that AZT that was coupled to the NCAs significantly contributes to the overall antiviral activity of the conjugates leading to complementary effects. These results highlight the potential of using NCA-AZTMP as dual-targeting preparations against HIV-1 in which both the carrier and the coupled drug contribute to the therapeutic efficacy acting at a different level in the replication cycle.
Collapse
Affiliation(s)
- M E Kuipers
- Groningen Institute for Drug Studies, Section of Pharmacokinetics and Drug Delivery, University Centre for Pharmacy, The Netherlands
| | | | | | | | | | | | | |
Collapse
|