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Wang X, Chiu W, Klaassen H, Marchand A, Chaltin P, Neyts J, Jochmans D. A Robust Phenotypic High-Throughput Antiviral Assay for the Discovery of Rabies Virus Inhibitors. Viruses 2023; 15:2292. [PMID: 38140533 PMCID: PMC10747594 DOI: 10.3390/v15122292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 11/10/2023] [Accepted: 11/14/2023] [Indexed: 12/24/2023] Open
Abstract
Rabies virus (RABV) causes severe neurological symptoms in mammals. The disease is almost inevitably lethal as soon as clinical symptoms appear. The use of rabies immunoglobulins (RIG) and vaccination in post-exposure prophylaxis (PEP) can provide efficient protection, but many people do not receive this treatment due to its high cost and/or limited availability. Highly potent small molecule antivirals are urgently needed to treat patients once symptoms develop. In this paper, we report on the development of a high-throughput phenotypic antiviral screening assay based on the infection of BHK-21 cells with a fluorescent reporter virus and high content imaging readout. The assay was used to screen a repurposing library of 3681 drugs (all had been studied in phase 1 clinical trials). From this series, salinomycin was found to selectively inhibit viral replication by blocking infection at the entry stage. This shows that a high-throughput assay enables the screening of large compound libraries for the purposes of identifying inhibitors of RABV replication. These can then be optimized through medicinal chemistry efforts and further developed into urgently needed drugs for the treatment of symptomatic rabies.
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Affiliation(s)
- Xinyu Wang
- Rega Institute, Department of Microbiology, Immunology and Transplantation, KU Leuven, Herestraat 49 Box 1043, 3000 Leuven, Belgium; (X.W.); (W.C.)
| | - Winston Chiu
- Rega Institute, Department of Microbiology, Immunology and Transplantation, KU Leuven, Herestraat 49 Box 1043, 3000 Leuven, Belgium; (X.W.); (W.C.)
| | - Hugo Klaassen
- Cistim Leuven vzw, Bioincubator 2, Gaston Geenslaan 2, 3001 Leuven, Belgium; (H.K.); (A.M.); (P.C.)
| | - Arnaud Marchand
- Cistim Leuven vzw, Bioincubator 2, Gaston Geenslaan 2, 3001 Leuven, Belgium; (H.K.); (A.M.); (P.C.)
| | - Patrick Chaltin
- Cistim Leuven vzw, Bioincubator 2, Gaston Geenslaan 2, 3001 Leuven, Belgium; (H.K.); (A.M.); (P.C.)
- Center for Drug Design and Discovery (CD3), KU Leuven R&D, 3000 Leuven, Belgium
| | - Johan Neyts
- Rega Institute, Department of Microbiology, Immunology and Transplantation, KU Leuven, Herestraat 49 Box 1043, 3000 Leuven, Belgium; (X.W.); (W.C.)
| | - Dirk Jochmans
- Rega Institute, Department of Microbiology, Immunology and Transplantation, KU Leuven, Herestraat 49 Box 1043, 3000 Leuven, Belgium; (X.W.); (W.C.)
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Antimicrobial Potential, Antioxidant Activity, and Phenolic Content of Grape Seed Extracts from Four Grape Varieties. Microorganisms 2023; 11:microorganisms11020395. [PMID: 36838361 PMCID: PMC9963647 DOI: 10.3390/microorganisms11020395] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/27/2023] [Accepted: 02/01/2023] [Indexed: 02/08/2023] Open
Abstract
The aim of this study was to evaluate the total phenolic content, composition, and antioxidant and antibacterial activities of four grape seed extracts (Cabernet Sauvignon, Marselan, Pinot Noir, and Tamyanka). The total phenolic content (TPC) and flavonoid, anthocyanin, procyanidin, ascorbic acid, DPPH, and ABTS antioxidant capacities of the grape seed extracts (GSEs) were determined. The extracts showed high TPC values (79.06-111.22 mg GAE/g). The individual components in the GSEs were determined using HPLC. High contents of catechin, epicatechin, and procyanidin B1 were found in the extracts. The antimicrobial activity of the obtained GSEs against Staphylococcus aureus, Bacillus cereus, and Escherichia coli was evaluated using the agar diffusion test and a test to determine the minimum inhibitory concentration (MIC). According to the effect on the growth of pathogens, the extracts were ranked in the following order: Pinot Noir > Marselan > Cabernet Sauvignon > Tamyanka. The tested bacteria showed high sensitivity to the extracts (MIC = 0.12-0.50 mg/mL). According to the MIC values, the bacteria were in the following order: S. aureus > B. cereus > E. coli. A correlation was found between the phenolic content of the GSEs and their antibacterial potential. The obtained results show that the studied GSEs have good potential as antioxidant and antimicrobial agents.
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Plant Extracts and SARS-CoV-2: Research and Applications. Life (Basel) 2023; 13:life13020386. [PMID: 36836744 PMCID: PMC9965937 DOI: 10.3390/life13020386] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/29/2022] [Accepted: 01/28/2023] [Indexed: 02/01/2023] Open
Abstract
The recent pandemic of COVID-19 caused by the SARS-CoV-2 virus has brought upon the world an unprecedented challenge. During its acute dissemination, a rush for vaccines started, making the scientific community come together and contribute to the development of efficient therapeutic agents and vaccines. Natural products have been used as sources of individual molecules and extracts capable of inhibiting/neutralizing several microorganisms, including viruses. Natural extracts have shown effective results against the coronavirus family, when first tested in the outbreak of SARS-CoV-1, back in 2002. In this review, the relationship between natural extracts and SARS-CoV is discussed, while also providing insight into misinformation regarding the use of plants as possible therapeutic agents. Studies with plant extracts on coronaviruses are presented, as well as the main inhibition assays and trends for the future regarding the yet unknown long-lasting effects post-infection with SARS-CoV-2.
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Pasquereau S, Galais M, Bellefroid M, Pachón Angona I, Morot-Bizot S, Ismaili L, Van Lint C, Herbein G. Ferulic acid derivatives block coronaviruses HCoV-229E and SARS-CoV-2 replication in vitro. Sci Rep 2022; 12:20309. [PMID: 36434137 PMCID: PMC9700709 DOI: 10.1038/s41598-022-24682-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 11/18/2022] [Indexed: 11/27/2022] Open
Abstract
A novel coronavirus, SARS-CoV-2, emerged in China at the end of 2019 causing a large global outbreak. As treatments are of the utmost importance, drugs with broad anti-coronavirus activity embody a rich and rapid drug discovery landscape, where candidate drug compounds could be identified and optimized. To this end, we tested ten small-molecules with chemical structures close to ferulic acid derivatives (FADs) (n = 8), caffeic acid derivatives (CAFDs) (n = 1) and carboxamide derivatives (CAMDs) (n = 1) for their ability to reduce HCoV-229E replication, another member of the coronavirus family. Among these ten drugs tested, five of them namely MBA112, MBA33, MBA27-1, OS4-1 and MBA108-1 were highly cytotoxic and did not warrant further testing. In contrast, we observed a moderate cytotoxicity for two of them, MBA152 and 5c. Three drugs, namely MBA140, LIJ2P40, and MBA28 showed lower cytotoxicity. These candidates were then tested for their antiviral propreties against HCoV-229E and SARS-CoV2 replication. We first observed encouraging results in HCoV-229E. We then measured a reduction of the viral SARS-CoV2 replication by 46% with MBA28 (EC50 > 200 µM), by 58% with MBA140 (EC50 = 176 µM), and by 82% with LIJ2P40 (EC50 = 66.5 µM). Overall, the FAD LIJ2P40 showed a reduction of the viral titer on SARS-CoV-2 up to two logs with moderate cytotoxicity which opens the door to further evaluation to fight Covid-19.
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Affiliation(s)
- Sébastien Pasquereau
- grid.7459.f0000 0001 2188 3779Pathogens and Inflammation/EPILAB Laboratory, EA 4266, Université de Franche-Comté, Université Bourgogne Franche-Comté (UBFC), Besançon, France
| | - Mathilde Galais
- grid.4989.c0000 0001 2348 0746Service of Molecular Virology, Department of Molecular Biology (DBM), Université Libre de Bruxelles (ULB), 6041 Gosselies, Belgium
| | - Maxime Bellefroid
- grid.4989.c0000 0001 2348 0746Service of Molecular Virology, Department of Molecular Biology (DBM), Université Libre de Bruxelles (ULB), 6041 Gosselies, Belgium
| | - Irene Pachón Angona
- grid.493090.70000 0004 4910 6615Neurosciences Intégratives et Cliniques EA 481, Pôle de Chimie Organique et Thérapeutique, Univ. Bourgogne Franche-Comté, UFR Santé, Besançon, France
| | | | - Lhassane Ismaili
- grid.493090.70000 0004 4910 6615Neurosciences Intégratives et Cliniques EA 481, Pôle de Chimie Organique et Thérapeutique, Univ. Bourgogne Franche-Comté, UFR Santé, Besançon, France
| | - Carine Van Lint
- grid.4989.c0000 0001 2348 0746Service of Molecular Virology, Department of Molecular Biology (DBM), Université Libre de Bruxelles (ULB), 6041 Gosselies, Belgium
| | - Georges Herbein
- grid.7459.f0000 0001 2188 3779Pathogens and Inflammation/EPILAB Laboratory, EA 4266, Université de Franche-Comté, Université Bourgogne Franche-Comté (UBFC), Besançon, France ,grid.411158.80000 0004 0638 9213Department of Virology, CHU Besançon, Besançon, France
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Zheng J, Xu Y, Khan A, Sun P, Sun Y, Fan K, Yin W, Wang S, Li H, Sun N. Curcumol inhibits encephalomyocarditis virus by promoting IFN-β secretion. BMC Vet Res 2021; 17:318. [PMID: 34587973 PMCID: PMC8482695 DOI: 10.1186/s12917-021-03015-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 09/03/2021] [Indexed: 11/28/2022] Open
Abstract
Background Encephalomyocarditis virus (EMCV) infection can cause reproductive failure in sows and acute myocarditis and sudden death in piglets. It has caused huge economic losses to the global pig industry and that is why it is necessary to develop effective new treatment compounds. Zedoary turmeric oil has been used for treating myocarditis. Curcumol extracted from the roots of curcuma is one of the main active ingredient of zedoary turmeric oil. The anti-EMCV activity of curcumol along with the molecular mechanisms involved with a focus on IFN-β signaling pathway was investigated in this study. Method 3-(4,5-dimethyithiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was used to determine the maximum non-toxic concentration (MNTC), 50% cytotoxic concentration (CC50), maximum inhibition rate (MIR) and 50% effective concentration (EC50) against EMCV. Through EMCV load, the anti-viral effect of curcumol was quantitatively determined using real-time quantitative PCR (qPCR). The effect of curcumol on the expression of IFN-β was investigated using real-time quantitative PCR and ELISA. Western blot was used to determine the amounts of MDA5, MAVS, TANK, IRF3 and P-IRF3 proteins in human embryonic kidney 293 T (HEK-293 T) cells infected with EMCV. Results The results of MTT showed that compared with the ribavirin positive control group, the maximum inhibition ratio (MIR) of curcumol was greater but the selection index (SI) value was much smaller than that of ribavirin. The results of qPCR showed that curcumol and ribavirin significantly reduced the replication of EMCV in HEK-293 T cells. The curcumol (0.025 mg/mL) treatment has significantly increased IFN-β mRNA expression in the EMCV-infected HEK-293 T cells while ribavirin treatment did not. The results of ELISA showed that curcumol (0.025 mg/mL and 0.0125 mg/mL) has significantly increased the expression of IFN-β protein in EMCV-infected HEK-293 T cells. The results of Western blot showed that curcumol can inhibit the degradation of TANK protein mediated by EMCV and promote the expression of MDA5 and P-IRF3, while the protein expression level of MAVS and IRF3 remain unchanged. Conclusion Curcumol has biological activity against EMCV which we suggest that IFN-β signaling pathway is one of its mechanisms. Supplementary Information The online version contains supplementary material available at 10.1186/s12917-021-03015-4.
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Affiliation(s)
- Jiangang Zheng
- College of Veterinary Medicine, Shanxi Agricultural University, Taiyuan, Shanxi, 030000, P.R. China
| | - Yinlan Xu
- College of Veterinary Medicine, Shanxi Agricultural University, Taiyuan, Shanxi, 030000, P.R. China
| | - Ajab Khan
- College of Veterinary Medicine, Shanxi Agricultural University, Taiyuan, Shanxi, 030000, P.R. China
| | - Panpan Sun
- Laboratory Animal Center, Shanxi Agricultural University, Taiyuan, Shanxi, 030000, P.R. China
| | - Yaogui Sun
- College of Veterinary Medicine, Shanxi Agricultural University, Taiyuan, Shanxi, 030000, P.R. China
| | - Kuohai Fan
- Laboratory Animal Center, Shanxi Agricultural University, Taiyuan, Shanxi, 030000, P.R. China
| | - Wei Yin
- College of Veterinary Medicine, Shanxi Agricultural University, Taiyuan, Shanxi, 030000, P.R. China
| | - Shaoyu Wang
- School of Community Health, Faculty of Science, Charles Sturt University, Bathurst, New South Wales, 2800, Australia
| | - Hongquan Li
- College of Veterinary Medicine, Shanxi Agricultural University, Taiyuan, Shanxi, 030000, P.R. China.
| | - Na Sun
- College of Veterinary Medicine, Shanxi Agricultural University, Taiyuan, Shanxi, 030000, P.R. China.
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Evran S, Tayyarcan EK, Acar-Soykut E, Guven B, Durakli-Velioglu S, Boyaci IH. Investigation of phage and molasses interactions for the biocontrol of E. coli O157:H7. Can J Microbiol 2021; 68:1-11. [PMID: 34529921 DOI: 10.1139/cjm-2021-0211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Resistance to antibiotics is one of the most critical health problems in the world. Therefore, finding new treatment methods to be used as alternatives to antibiotics has become a priority for researchers. Similar to phages, certain products containing antimicrobial components, such as molasses, are widely used to eliminate resistant bacteria. Molasses has a strong antimicrobial effect on bacterial cells, and this effect is thought to be due to the breakdown of the cytoplasmic cell membrane and cell proteins of the polyphenols in molasses. In the present study, phage-molasses interactions were investigated to examine the effects of concomitant use. It was found that molasses samples increased the size of phage plaques by up to 3-fold, and MIC and 1/2 × MIC concentrations of molasses increased the burst size of phages. Although no synergistic effect was found between the phage and molasses, the antimicrobial activities of the components and the effect of molasses on phage activity were demonstrated.
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Affiliation(s)
- Sefika Evran
- Department of Food Engineering, Beytepe, Hacettepe University, Ankara, Turkey
| | | | - Esra Acar-Soykut
- Yeniçağa Yaşar Çelik Vocational School, Bolu Abant İzzet Baysal University, Bolu, Turkey
| | - Burcu Guven
- Department of Food Engineering, Beytepe, Hacettepe University, Ankara, Turkey
| | - Serap Durakli-Velioglu
- Department of Food Engineering, Faculty of Agriculture, Tekirdag Namik Kemal University, Tekirdağ, Turkey
| | - Ismail Hakki Boyaci
- Department of Food Engineering, Beytepe, Hacettepe University, Ankara, Turkey
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Aminu S, Ibrahim MA, Sallau AB. Interaction of SARS-CoV-2 spike protein with angiotensin converting enzyme inhibitors and selected compounds from the chemical entities of biological interest. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2021; 10:48. [PMID: 34458381 PMCID: PMC8386153 DOI: 10.1186/s43088-021-00138-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 08/13/2021] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Recent COVID-19 outbreak has prompted the search of novel therapeutic agents to treat the disease. The initial step of the infection involves the binding of the virus through the viral spike protein with the host angiotensin converting enzyme 2 (ACE2). In this study, the interaction of some ACE or ACE2 inhibitors and their analogues as well as selected compounds with the viral spike protein as a strategy to hinder viral-ACE2 interaction were investigated. SARS-CoV-2 spike protein as well as the ligands were retrieved from protein databank and ChEBI database respectively. The molecules were prepared before initiating the virtual screening using PyRx software. Discovery studio was used to further visualize the binding interactions between the compounds and the protein. RESULTS The ACE inhibitors and their analogues fosinopril (1-), fosinopril and moexipril have the best binding affinity to the protein with binding energies < - 7.0 kcal/mol while non-flavonoid stilben-4-ol binds with free binding energy of - 7.1 kcal/mol. Others compounds which belong to either the flavonoids, terpenes and alkaloid classes also have binding energies < - 7.0 kcal/mol. Such high binding energies were enhanced via hydrogen bond (h-bond) interactions in addition to other interactions observed between the compounds and the amino acid residues of the protein. CONCLUSIONS The ACE inhibitors and their analogues as well as the selected compounds could serve as inhibitors of the spike protein as well as lead in drug discovery processes to target the SARS-CoV-2 virus.
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Affiliation(s)
- Suleiman Aminu
- Department of Biochemistry, Ahmadu Bello University, Zaria, Nigeria
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Kowalczyk M, Golonko A, Świsłocka R, Kalinowska M, Parcheta M, Swiergiel A, Lewandowski W. Drug Design Strategies for the Treatment of Viral Disease. Plant Phenolic Compounds and Their Derivatives. Front Pharmacol 2021; 12:709104. [PMID: 34393787 PMCID: PMC8363300 DOI: 10.3389/fphar.2021.709104] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/15/2021] [Indexed: 01/08/2023] Open
Abstract
The coronavirus pandemic (SARS CoV-2) that has existed for over a year, constantly forces scientists to search for drugs against this virus. In silico research and selected experimental data have shown that compounds of natural origin such as phenolic acids and flavonoids have promising antiviral potential. Phenolic compounds inhibit multiplication of viruses at various stages of the viral life cycle, e.g., attachment (disturbance of the interaction between cellular and viral receptors), penetration (inhibition of viral pseudo-particle fusion to the host membrane), replication (inhibition of integrase and 3C-like protease), assembly and maturation (inhibition of microsomal triglyceride transfer protein (MTP) activity hydrolysis) and release (inhibition of secretion of apolipoprotein B (apoB) from infected cells). Phenolic compounds also indirectly influence on the viral life cycle by affecting the host cell's biochemical processes that viruses use for their own benefit. Phenolic compounds may inhibit the proteasomes and cellular deubiquitinating activity that causes an increase in the ubiquitinated proteins level in host cells. This, in turn, contributes to the lowering the available ubiquitin molecules that viruses could use for their own replication. One of the drug design strategy for the treatment of viral diseases may be an enhancement of the antiviral properties of phenolic compounds by metal complexation. Many studies have shown that the presence of a metal ion in the structure can significantly affect the affinity of the compound to key structural elements of the SARS CoV-2, such as Mpro protease, RNA-dependent RNA polymerase (RdRp) and spike protein. We believe that in the era of coronavirus pandemic, it is necessary to reconsider the search for therapeutics among well-known compounds of plant origin and their metal complexes.
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Affiliation(s)
- Monika Kowalczyk
- Laboratory of Biotechnology and Molecular Engineering, Department of Microbiology, Institute of Agricultural and Food Biotechnology—State Research Institute, Warsaw, Poland
| | - Aleksandra Golonko
- Department of Microbiology, Institute of Agricultural and Food Biotechnology—State Research Institute, Warsaw, Poland
| | - Renata Świsłocka
- Department of Chemistry, Biology and Biotechnology, Bialystok University of Technology, Bialystok, Poland
| | - Monika Kalinowska
- Department of Chemistry, Biology and Biotechnology, Bialystok University of Technology, Bialystok, Poland
| | - Monika Parcheta
- Department of Chemistry, Biology and Biotechnology, Bialystok University of Technology, Bialystok, Poland
| | - Artur Swiergiel
- Faculty of Biology, University of Gdansk, Gdansk, Poland
- Institute of Agricultural and Food Biotechnology—State Research Institute, Warsaw, Poland
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İSTİFLİ ES, ŞIHOĞLU TEPE A, SARIKÜRKCÜ C, TEPE B. Molecular interactions of some phenolics with 2019-nCoV and related pathway elements. INTERNATIONAL JOURNAL OF SECONDARY METABOLITE 2021. [DOI: 10.21448/ijsm.958597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Marongiu L, Burkard M, Venturelli S, Allgayer H. Dietary Modulation of Bacteriophages as an Additional Player in Inflammation and Cancer. Cancers (Basel) 2021; 13:cancers13092036. [PMID: 33922485 PMCID: PMC8122878 DOI: 10.3390/cancers13092036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 04/15/2021] [Accepted: 04/21/2021] [Indexed: 01/06/2023] Open
Abstract
Natural compounds such as essential oils and tea have been used successfully in naturopathy and folk medicine for hundreds of years. Current research is unveiling the molecular role of their antibacterial, anti-inflammatory, and anticancer properties. Nevertheless, the effect of these compounds on bacteriophages is still poorly understood. The application of bacteriophages against bacteria has gained a particular interest in recent years due to, e.g., the constant rise of antimicrobial resistance to antibiotics, or an increasing awareness of different types of microbiota and their potential contribution to gastrointestinal diseases, including inflammatory and malignant conditions. Thus, a better knowledge of how dietary products can affect bacteriophages and, in turn, the whole gut microbiome can help maintain healthy homeostasis, reducing the risk of developing diseases such as diverse types of gastroenteritis, inflammatory bowel disease, or even cancer. The present review summarizes the effect of dietary compounds on the physiology of bacteriophages. In a majority of works, the substance class of polyphenols showed a particular activity against bacteriophages, and the primary mechanism of action involved structural damage of the capsid, inhibiting bacteriophage activity and infectivity. Some further dietary compounds such as caffeine, salt or oregano have been shown to induce or suppress prophages, whereas others, such as the natural sweeter stevia, promoted species-specific phage responses. A better understanding of how dietary compounds could selectively, and specifically, modulate the activity of individual phages opens the possibility to reorganize the microbial network as an additional strategy to support in the combat, or in prevention, of gastrointestinal diseases, including inflammation and cancer.
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Affiliation(s)
- Luigi Marongiu
- Department of Experimental Surgery—Cancer Metastasis, Medical Faculty Mannheim, Ruprecht-Karls University of Heidelberg, Ludolf-Krehl-Str. 13-17, 68167 Mannheim, Germany;
| | - Markus Burkard
- Department of Biochemistry of Nutrition, University of Hohenheim, Garbenstr. 30, 70599 Stuttgart, Germany;
| | - Sascha Venturelli
- Department of Biochemistry of Nutrition, University of Hohenheim, Garbenstr. 30, 70599 Stuttgart, Germany;
- Department of Vegetative and Clinical Physiology, University Hospital of Tuebingen, Otfried-Müllerstr. 27, 72076 Tuebingen, Germany
- Correspondence: (S.V.); (H.A.); Tel.: +49-(0)711-459-24113 (ext. 24195) (S.V.); +49-(0)621-383-71630 (ext. 71635) (H.A.); Fax: +49-(0)-711-459-23822 (S.V.); +49-(0)-621-383-71631 (H.A.)
| | - Heike Allgayer
- Department of Experimental Surgery—Cancer Metastasis, Medical Faculty Mannheim, Ruprecht-Karls University of Heidelberg, Ludolf-Krehl-Str. 13-17, 68167 Mannheim, Germany;
- Correspondence: (S.V.); (H.A.); Tel.: +49-(0)711-459-24113 (ext. 24195) (S.V.); +49-(0)621-383-71630 (ext. 71635) (H.A.); Fax: +49-(0)-711-459-23822 (S.V.); +49-(0)-621-383-71631 (H.A.)
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Chaachouay N, Douira A, Zidane L. COVID-19, prevention and treatment with herbal medicine in the herbal markets of Salé Prefecture, North-Western Morocco. Eur J Integr Med 2021; 42:101285. [PMID: 33520016 PMCID: PMC7836426 DOI: 10.1016/j.eujim.2021.101285] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 01/02/2021] [Accepted: 01/04/2021] [Indexed: 12/11/2022]
Abstract
Introduction Coronaviruses are important animal and human pathogens. Towards the end of 2019, the novel coronavirus identified in Wuhan, China, presented as a cluster of symptoms of pneumonia. Its quick spread resulted in a global pandemic. This research documents detailed ethnopharmacological information on the medicinal plant species used by herbalists against coronavirus disease. Methods The study was conducted in Salé Prefecture, from March 1st, 2020 to May 31st, 2020. Semi-structured face to face interviews were held with 30 herbalists and collected; socio-demographic characteristics, the names of local species, and traditional remedies being used. The data were analyzed through the use reports (UR) and medicinal use value (MUV). Results In total, 20 plant species from 20 genera and 14 families had been most frequently used by herbalists from Salé Prefecture for the prevention and treatment of COVID 19. The most mentioned plant was Eucalyptus globulus Labill., followed by Azadirachta indica A. Juss,. and Ziziphus lotus (L.) Lam. Moreover, the most commonly used plant parts for herbal preparations were leaves (28.43%) and seeds (17.5%), and the majority of remedies were prepared through infusion. Conclusions The present study is the first contribution to the ethnopharmacological profile of this Prefecture. It is recommended that the constituents of indigenous species be studied to determine the therapeutic effects and mechanisms of action. However, attention must be paid to the conservation of medicinal species, comprehensively documenting traditional medicinal knowledge as well as conducting phytochemical validation of reported plants.
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Affiliation(s)
- Noureddine Chaachouay
- Higher School of Education and Training, Hassan I University, 50 Rue Ibnou Lhaytham B.P. 577, 26002 Settat, Morocco
| | - Allal Douira
- Plant, Animal Productions and Agro-industry Laboratory, Department of Biology, Faculty of Sciences, Ibn Tofail University, B.P. 133 14000, Kenitra, Morocco
| | - Lahcen Zidane
- Plant, Animal Productions and Agro-industry Laboratory, Department of Biology, Faculty of Sciences, Ibn Tofail University, B.P. 133 14000, Kenitra, Morocco
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Grygorieva O, Vergun O, Klymenko S, Zhurba M, Horčinová Sedláčková V, Ivanišová E, Brindza J. Estimation of phenolic compounds content and antioxidant activity of leaves extracts of some selected non-traditional plants. POTRAVINARSTVO 2020. [DOI: 10.5219/1314] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The aim of the research is the determination of the total antioxidant activity and the content of phenolic compounds of the leaves of 12 species of non-traditional plants, namely, Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem., Aronia mitschurinii A.K. Skvortsov & Maitul., Castanea sativa Mill., Chaenomeles japonica (Thunb.) Lindl., Cornus mas L., Diospyros kaki L., Diospyros lotus L., Diospyros virginiana L., Lycium barbarum L., Lycium сhinense Mill., Pseudocydonia sinensis (Thouin) C.K. Schneid., Ziziphus jujuba Mill. Total phenolic content was evaluated using the Folin-Ciocalteu reagent assay. Antioxidant activity was measured using two different methods (DPPH – 2,2-diphenyl-1-picrylhydrazyl, MRAP – molybdenum reducing antioxidant power). Significant variability was observed in phenolic compounds content and total antioxidant activity. Total polyphenol content ranged from 38.02 (Z. jujuba) to 80.58 (C. sativa) mg GAE.g-1 DM, total flavonoid content from 22.47 (P. sinensis) to 54.61 (L. barbarum) mg QE.g-1 DM and phenolic acids content from 3.51 (A. mitschurinii) to 24.67 (Ch. japonica) mg CAE.g-1 DM. All tested samples exhibited DPPH• radical scavenging activities with values from 6.92 (A. mitschurinii) to 9.0 (C. mas) mg TEAC.g-1 DM. Antioxidant activity by molybdenum reducing antioxidant power method ranged from 109.43 (A. mitschurinii) to 322.95 (C. mas) mg TEAC.g-1 DM. Differences between the species of non-traditional plants were significant in all observed parameters. Obtained results of phytochemical composition demonstrated the possibility of leaves' use of non-traditional plants as sources of valuable bioactive compounds with health-promoting and disease-preventing properties.
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In Vitro Evaluation of Curcumin-Encapsulated Chitosan Nanoparticles against Feline Infectious Peritonitis Virus and Pharmacokinetics Study in Cats. BIOMED RESEARCH INTERNATIONAL 2020; 2020:3012198. [PMID: 32596292 PMCID: PMC7262662 DOI: 10.1155/2020/3012198] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 03/31/2020] [Accepted: 04/15/2020] [Indexed: 01/23/2023]
Abstract
Feline infectious peritonitis (FIP) is an important feline viral disease, causing an overridden inflammatory response that results in a high mortality rate, primarily in young cats. Curcumin is notable for its biological activities against various viral diseases; however, its poor bioavailability has hindered its potential in therapeutic application. In this study, curcumin was encapsulated in chitosan nanoparticles to improve its bioavailability. Curcumin-encapsulated chitosan (Cur-CS) nanoparticles were synthesised based on the ionic gelation technique and were spherical and cuboidal in shape, with an average particle size of 330 nm and +42 mV in zeta potential. The nanoparticles exerted lower toxicity in Crandell-Rees feline kidney (CrFK) cells and enhanced antiviral activities with a selective index (SI) value three times higher than that of curcumin. Feline-specific bead-based multiplex immunoassay and qPCR were used to examine their modulatory effects on proinflammatory cytokines, including tumour necrosis factor (TNF)α, interleukin- (IL-) 6, and IL-1β. There were significant decrements in IL-1β, IL-6, and TNFα expression in both curcumin and Cur-CS nanoparticles. Based on the multiplex immunoassay, curcumin and the Cur-CS nanoparticles could lower the immune-related proteins in FIP virus (FIPV) infection. The single- and multiple-dose pharmacokinetics profiles of curcumin and the Cur-CS nanoparticles were determined by high-performance liquid chromatography (HPLC). Oral delivery of the Cur-CS nanoparticles to cats showed enhanced bioavailability with a maximum plasma concentration (C max) value of 621.5 ng/mL. Incorporating chitosan nanoparticles to deliver curcumin improved the oral bioavailability and antiviral effects of curcumin against FIPV infection. This study provides evidence for the potential of Cur-CS nanoparticles as a supplementary treatment of FIP.
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Zheng J, Xu Y, Khan A, Wang S, Li H, Sun N. In vitro Screening of Traditional Chinese Medicines Compounds Derived with Anti-encephalomyocarditis Virus Activities. BIOTECHNOL BIOPROC E 2020. [DOI: 10.1007/s12257-019-0354-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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15
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Phylogenetic analysis of the whole genome sequence of a dog lineage rabies virus detected from cattle in eastern China, 2019. Braz J Microbiol 2020; 51:1453-1458. [PMID: 32232744 DOI: 10.1007/s42770-020-00264-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 03/19/2020] [Indexed: 10/24/2022] Open
Abstract
Rabies is an important zoonosis worldwide, and this disease is caused by the rabies virus. Dogs and bat are the major hosts of rabies virus; however, many animals could infect with the rabies virus. By biting or scratching by an infected animal, rabies virus can be transmitted to cattle which is an important domestic animal in animal husbandry. Here, we report a case about a rabies virus (abbreviated JSTZ190314) found in cattle in eastern China in 2019. Our findings suggest that this rabies virus JSTZ190314 was a dog-origin rabies virus and belonged to the Asia clade. Furthermore, we found that this JSTZ190314-like rabies virus has been prevalent in China for more than 13 years and infected six species of animals. Our findings suggested that enhanced surveillance and research of rabies virus infection in bovine populations is needed.
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Status of antiviral therapeutics against rabies virus and related emerging lyssaviruses. Curr Opin Virol 2019; 35:1-13. [PMID: 30753961 DOI: 10.1016/j.coviro.2018.12.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 12/19/2018] [Accepted: 12/20/2018] [Indexed: 12/19/2022]
Abstract
Rabies virus (RABV) constitutes a major social and economic burden associated with 60 000 deaths annually worldwide. Although pre-exposure and post-exposure treatment options are available, they are efficacious only when initiated before the onset of clinical symptoms. Aggravating the problem, the current RABV vaccine does not cross-protect against the emerging zoonotic phylogroup II lyssaviruses. A requirement for an uninterrupted cold chain and high cost of the immunoglobulin component of rabies prophylaxis generate an unmet need for the development of RABV-specific antivirals. We discuss desirable anti-RABV drug profiles, past efforts to address the problem and inhibitor candidates identified, and examine how the rapidly expanding structural insight into RABV protein organization has illuminated novel druggable target candidates and paved the way to structure-aided drug optimization. Special emphasis is given to the viral RNA-dependent RNA polymerase complex as a promising target for direct-acting broad-spectrum RABV inhibitors.
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17
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18
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Abouzeed YM, Zgheel F, Elfahem AA, Almagarhe MS, Dhawi A, Elbaz A, Hiblu MA, Kammon A, Ahmed MO. Identification of phenolic compounds, antibacterial and antioxidant activities of raisin extracts. Open Vet J 2018; 8:479-484. [PMID: 30775288 PMCID: PMC6356098 DOI: 10.4314/ovj.v8i4.20] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 11/29/2018] [Indexed: 12/20/2022] Open
Abstract
In this study, antibacterial, antioxidant and phenolic compounds of raisin extracts was evaluated. Different solvent extraction methods were utilized to extract phenolic compounds from raisin. The phenolic compounds of raisin extracts was determined using HPLC and three compounds were found, catechin, quercetin and rutin. The antibacterial activity of the acetonic extract was tested against four bacterial pathogens viz. Staphylococcus aureus, Pseudomonas aeroginosa, Salmonella typhimurium and Escherichia coli using both disk diffusion and minimum inhibitory concentration (MIC) methods. The acetonic extract exhibited the highest activity against Staphylococcus aureus with zone of inhibition of 14mm and the MIC of 25 mg/ml. However, there was a little activity against E. coli and S. typhimurium. The methanolic extract showed good antioxidant activity as indicated by 2,2-diphenyl-1-picrylhydrazyl free radical assay (DPPH). In conclusion, raisin contains potent phenolic compounds and their application might function as promising natural preservative and antimicrobial agents in food industry and also good antioxidant food that helps to minimize the risk of degenerative diseases.
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Affiliation(s)
- Yousef M. Abouzeed
- Department of Microbiology and Parasitology, Faculty of Veterinary Medicine, University of Tripoli, Tripoli, Libya
| | - Faraj Zgheel
- Department of Microbiology, Biotechnology Research Centre, Tripoli, Libya
| | | | | | - Abdulgader Dhawi
- Department of Microbiology and Parasitology, Faculty of Veterinary Medicine, University of Tripoli, Tripoli, Libya
| | - Abdulkareem Elbaz
- Department of Microbiology and Parasitology, Faculty of Veterinary Medicine, University of Tripoli, Tripoli, Libya
| | - Murad A. Hiblu
- Department of Internal Medicine, Faculty of Veterinary Medicine, University of Tripoli, Tripoli, Libya
| | - Abdulwahab Kammon
- Department of Poultry and Fish Diseases, Faculty of Veterinary Medicine, University of Tripoli, Tripoli, Libya
| | - Mohamed O. Ahmed
- Department of Microbiology and Parasitology, Faculty of Veterinary Medicine, University of Tripoli, Tripoli, Libya
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Gurău F, Baldoni S, Prattichizzo F, Espinosa E, Amenta F, Procopio AD, Albertini MC, Bonafè M, Olivieri F. Anti-senescence compounds: A potential nutraceutical approach to healthy aging. Ageing Res Rev 2018; 46:14-31. [PMID: 29742452 DOI: 10.1016/j.arr.2018.05.001] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 04/02/2018] [Accepted: 05/03/2018] [Indexed: 01/10/2023]
Abstract
The desire of eternal youth seems to be as old as mankind. However, the increasing life expectancy experienced by populations in developed countries also involves a significantly increased incidence of the most common age-related diseases (ARDs). Senescent cells (SCs) have been identified as culprits of organismal aging. Their number rises with age and their senescence-associated secretory phenotype fuels the chronic, pro-inflammatory systemic state (inflammaging) that characterizes aging, impairing the regenerative ability of stem cells and increasing the risk of developing ARDs. A variegated class of molecules, including synthetic senolytic compounds and natural compounds contained in food, have been suggested to possess anti-senescence activity. Senolytics are attracting growing interest, and their safety and reliability as anti-senescence drugs are being assessed in human clinical trials. Notably, since SCs spread inflammation at the systemic level through pro-oxidant and pro-inflammatory signals, foods rich in polyphenols, which exert antioxidant and anti-inflammatory actions, have the potential to be harnessed as "anti-senescence foods" in a nutraceutical approach to healthier aging. We discuss the beneficial effects of polyphenol-rich foods in relation to the Mediterranean diet and the dietary habits of long-lived individuals, and examine their ability to modulate bacterial genera in the gut.
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Affiliation(s)
- Felicia Gurău
- Department of Clinical and Molecular Sciences, DISCLIMO, Università Politecnica delle Marche, Ancona, Italy
| | - Simone Baldoni
- School of Medicinal Sciences and Health Products, University of Camerino, Camerino, Italy
| | | | - Emma Espinosa
- Department of Clinical and Molecular Sciences, DISCLIMO, Università Politecnica delle Marche, Ancona, Italy
| | - Francesco Amenta
- School of Medicinal Sciences and Health Products, University of Camerino, Camerino, Italy
| | - Antonio Domenico Procopio
- Department of Clinical and Molecular Sciences, DISCLIMO, Università Politecnica delle Marche, Ancona, Italy; Center of Clinical Pathology and Innovative Therapy, INRCA-IRCCS National Institute, Ancona, Italy
| | | | - Massimiliano Bonafè
- DIMES- Department of Experimental, Diagnostic and Specialty Medicine, Alma Mater Studiorum, Bologna, Italy; Biosciences Laboratory, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Forlì, Italy.
| | - Fabiola Olivieri
- Department of Clinical and Molecular Sciences, DISCLIMO, Università Politecnica delle Marche, Ancona, Italy; Center of Clinical Pathology and Innovative Therapy, INRCA-IRCCS National Institute, Ancona, Italy.
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20
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Tu Z, Gong W, Zhang Y, Feng Y, Liu Y, Tu C. Inhibition of Rabies Virus by 1,2,3,4,6-Penta- O-galloyl-β-d-Glucose Involves mTOR-Dependent Autophagy. Viruses 2018; 10:v10040201. [PMID: 29673174 PMCID: PMC5923495 DOI: 10.3390/v10040201] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 04/04/2018] [Accepted: 04/14/2018] [Indexed: 12/25/2022] Open
Abstract
The compound 1,2,3,4,6-penta-O-galloyl-β-d-glucose (PGG), a gallotannin present in various plants such as Rhus chinensis Mill and Paeonia suffruticosa, has a broad spectrum of antiviral effects. The present study investigated its potency against infection of mice with rabies virus (RABV). Results demonstrated that PGG strongly inhibited virus titers (50-fold), viral mRNA expression (up to 90%), and protein synthesis in vitro. Importantly, we found that PGG not only suppressed viral adsorption and entry, but also directly inactivated RABV through suppression of autophagy by mediating activation of the mTOR-dependent autophagy signaling pathway. In vivo, PGG (10 mg/kg) alleviated the clinical symptoms and reduced the mortality of infected mice by 27.3%. Collectively, our results indicate that PGG has potent anti-RABV effect, and merits further investigation as an anti-RABV drug.
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Affiliation(s)
- Zhongzhong Tu
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Jilin 130122, China.
| | - Wenjie Gong
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Jilin 130122, China.
| | - Yan Zhang
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Jilin 130122, China.
| | - Ye Feng
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Jilin 130122, China.
| | - Yan Liu
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Jilin 130122, China.
| | - Changchun Tu
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Jilin 130122, China.
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21
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Acetylcholinesterase Inhibition and Antioxidant Activity of N- trans-Caffeoyldopamine and N- trans-Feruloyldopamine. Sci Pharm 2018; 86:scipharm86020011. [PMID: 29617286 PMCID: PMC6027674 DOI: 10.3390/scipharm86020011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 03/07/2018] [Accepted: 03/24/2018] [Indexed: 11/16/2022] Open
Abstract
Phenolic acids and their derivatives found in nature are well-known for their potential biological activity. In this study, two amides derived from trans-caffeic/ferulic acid and dopamine were synthesized and characterized by Fourier-transform infrared spectroscopy (FTIR), mass spectrometry, proton and carbon-13 nuclear magnetic resonance spectroscopy. The compounds were tested for the inhibition of acetylcholinesterase (AChE) from Electrophorus electricus and for antioxidant activity by scavenging 2,2-diphenyl-1-pycrylhydrazyl free radical (DPPH•) and 2,2′-azinobis(3-ethylbenzothiazoline-6-sulphonic acid) radical cation (ABTS•+), reducing ferric ions, and ferrous ions chelation. N-trans-Feruloyldopamine displayed the highest inhibitory effect on AChE with half-maximal inhibitory concentration (IC50) values of 8.52 μM. In addition, an in silico study was done to determine the most favorable AChE cluster with the synthesized compounds. Further, these clusters were investigated for binding positions at the lowest free binding energy. Both synthesized hydroxycinnamates were found to be better antioxidants than the parent acids in in vitro tests applied. N-trans-Caffeoyldopamine showed the best antioxidant activity in the three tested methods—against non-biological stable free radicals IC50 5.95 μM for DPPH•, 0.24 μM for the ABTS•+ method, and for reducing power (ascorbic acid equivalent (AAE) 822.45 μmol/mmol)—while for chelation activity against Fe2+ ions N-trans-feruloyldopamine had slightly better antioxidant activity (IC50 3.17 mM).
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22
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Lee J, Kim I, Yeo S, Kim D, Kim M. Dextran-Conjugated Lysozymes Inhibit the Growth of Shigella sonnei and Viral Hemorrhagic Septicemia Virus. Prev Nutr Food Sci 2018; 23:60-69. [PMID: 29662849 PMCID: PMC5894787 DOI: 10.3746/pnf.2018.23.1.60] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 01/11/2018] [Indexed: 01/25/2023] Open
Abstract
Lysozyme is well known as a natural antimicrobial agent, but its function is limited in that it only combats Gram-positive bacteria. We investigated the inhibitory effects of dextran-conjugated lysozymes (DLs) against some strains of Gram-negative bacteria and viral hemorrhagic septicemia virus (VHSV). The Maillard reactions of the DL were performed at various pHs (3.0, 7.0, and 8.5) in the presence of saturated KBr solution for 1, 3, 5, 7, and 9 days. The growth inhibition effects against Gram-negative bacterial strains, such as Escherichia coli, Vibrio parahaemolyticus, Pseudomonas aeruginosa, Shigella sonnei, and Shigella flexneri were found only in some DLs. DLs incubated at pH 7.0 for 9 days strongly inhibited growth of S. sonnei (92.9%). Fathead minnow (FHM) cells were infected with VHSV. DLs treated at all pHs for 1 day resulted in more than 80% viability of VHSV-infected FHM cells. The results of this study suggest that our DLs can be useful in food preservatives, pharmaceuticals, or aquatic feed due to their inhibitory effects against pathogenic bacteria and viral infections.
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Affiliation(s)
- Joongjae Lee
- Department of Food Science and Nutrition, Dankook University, Chungnam 31116, Korea.,Natural Nutraceuticals Industrialization Research Center, Dankook University, Chungnam 31116, Korea
| | - Inyong Kim
- Department of Food Science and Nutrition, Dankook University, Chungnam 31116, Korea.,Natural Nutraceuticals Industrialization Research Center, Dankook University, Chungnam 31116, Korea
| | - Seoungsoon Yeo
- Department of Food Science and Nutrition, Dankook University, Chungnam 31116, Korea.,Natural Nutraceuticals Industrialization Research Center, Dankook University, Chungnam 31116, Korea
| | - Duwoon Kim
- Department of Food Science and Technology and Foodborne Virus Research Center, Chonnam National University, Gwangju 61186, Korea
| | - Misook Kim
- Department of Food Science and Nutrition, Dankook University, Chungnam 31116, Korea.,Natural Nutraceuticals Industrialization Research Center, Dankook University, Chungnam 31116, Korea
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23
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Anindita PD, Sasaki M, Okada K, Ito N, Sugiyama M, Saito-Tarashima N, Minakawa N, Shuto S, Otsuguro S, Ichikawa S, Matsuda A, Maenaka K, Orba Y, Sawa H. Ribavirin-related compounds exert in vitro inhibitory effects toward rabies virus. Antiviral Res 2018; 154:1-9. [PMID: 29601893 DOI: 10.1016/j.antiviral.2018.03.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Revised: 03/26/2018] [Accepted: 03/26/2018] [Indexed: 12/25/2022]
Abstract
Rabies remains an invariably fatal neurological disease despite the availability of a preventive vaccination and post-exposure prophylaxis that must be immediately administered to the exposed individual before symptom onset. There is no effective medication for treatment during the symptomatic phase. Ribavirin, a guanine nucleoside analog, is a potent inhibitor of rabies virus (RABV) replication in vitro but lacks clinical efficacy. Therefore, we attempted to identify potential ribavirin analogs with comparable or superior anti-RABV activity. Antiviral activity and cytotoxicity of the compounds were initially examined in human neuroblastoma cells. Among the tested compounds, two exhibited a 5- to 27-fold higher anti-RABV activity than ribavirin. Examination of the anti-RABV mechanisms of action of the compounds using time-of-addition and minigenome assays revealed that they inhibited viral genome replication and transcription. Addition of exogenous guanosine to RABV-infected cells diminished the antiviral activity of the compounds, suggesting that they are involved in guanosine triphosphate (GTP) pool depletion by inhibiting inosine monophosphate dehydrogenase (IMPDH). Taken together, our findings underline the potency of nucleoside analogs as a class of antiviral compounds for the development of novel agents against RABV.
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Affiliation(s)
- Paulina D Anindita
- Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan
| | - Michihito Sasaki
- Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan.
| | - Kazuma Okada
- Laboratory of Zoonotic Diseases, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
| | - Naoto Ito
- Laboratory of Zoonotic Diseases, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
| | - Makoto Sugiyama
- Laboratory of Zoonotic Diseases, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
| | - Noriko Saito-Tarashima
- Graduate School of Pharmaceutical Science, Tokushima University, Tokushima 770-8505, Japan
| | - Noriaki Minakawa
- Graduate School of Pharmaceutical Science, Tokushima University, Tokushima 770-8505, Japan
| | - Satoshi Shuto
- Laboratory of Organic Chemistry for Drug Development, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Satoko Otsuguro
- Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Satoshi Ichikawa
- Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Akira Matsuda
- Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Katsumi Maenaka
- Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Yasuko Orba
- Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan
| | - Hirofumi Sawa
- Division of Molecular Pathobiology, Research Center for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan; Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Sapporo 001-0020, Japan; Global Virus Network, Baltimore, MD 21201, USA.
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24
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Marosi A, Forgách P, Gyuranecz M, Sulyok KM, Bakonyi T. Evaluation of in vitro inhibitory potential of type-I interferons and different antiviral compounds on rabies virus replication. Vaccine 2018; 37:4663-4672. [PMID: 29459063 DOI: 10.1016/j.vaccine.2018.01.082] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 01/24/2018] [Accepted: 01/28/2018] [Indexed: 12/12/2022]
Abstract
Five different compounds were tested for their in vitro inhibitory effect against RABV multiplication in mouse neuroblastoma (N2A) cell line. N2A cells were infected with the fixed RABV strain CVS-11 one hour prior to adding antivirals or their respective combinations. The infectious titre of RABV as well as the quantity of viral RNA was determined in the cell culturing medium after 48 h. All five tested compounds (mouse interferon (IFN)-α and -β, ribavirin, favipiravir (T-705) and sorafenib) reduced viral replication in a concentration-dependent manner: IFN-β and sorafenib both provided 73.71% relative inhibition of viral replication in the highest non-cytotoxic concentration, while ribavirin caused 48.07%, IFN-α caused 44.87% and favipiravir caused 35.25% relative inhibition, respectively. When applied in combination, their antiviral activity was not synergistic, but a pronounced inhibition was detected when IFN-β was combined with sorafenib, ribavirin, or favipiravir. The highest antiviral effect was caused by the combination of IFN-β and sorafenib (77.19% relative inhibition). In other combinations there was an antagonistic effect detected in the reduction of viral replication. The results demonstrate that these compounds can be promising candidates for a potential combination treatment of rabies, noting that some combinations are not favourable in vitro, which makes thorough in vivo studies necessary.
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Affiliation(s)
- András Marosi
- Department of Microbiology and Infectious Diseases, University of Veterinary Medicine, Hungária krt. 23-25, 1143 Budapest, Hungary.
| | - Petra Forgách
- Department of Microbiology and Infectious Diseases, University of Veterinary Medicine, Hungária krt. 23-25, 1143 Budapest, Hungary
| | - Miklós Gyuranecz
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, Hungária krt. 21, 1143 Budapest, Hungary
| | - Kinga M Sulyok
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, Hungária krt. 21, 1143 Budapest, Hungary
| | - Tamás Bakonyi
- Department of Microbiology and Infectious Diseases, University of Veterinary Medicine, Hungária krt. 23-25, 1143 Budapest, Hungary; Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine Vienna, Veterinaerplatz 1, 1210 Vienna, Austria
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25
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Galloylation of polyphenols alters their biological activity. Food Chem Toxicol 2017; 105:223-240. [DOI: 10.1016/j.fct.2017.04.021] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 03/23/2017] [Accepted: 04/15/2017] [Indexed: 01/08/2023]
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26
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Use of rapid fluorescent focus inhibition test (RFFIT) for in vitro evaluation of anti-rabies activity. Virusdisease 2017; 28:127-132. [PMID: 28770237 DOI: 10.1007/s13337-017-0371-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 04/07/2017] [Indexed: 12/25/2022] Open
Abstract
Even in the twenty-first century, rabies remains one of the most dreaded diseases in many parts of the world. An effective chemotherapeutic still remains elusive. The present study was aimed at in vitro evaluation of crude extracts of Allamanda cathartica and Cynodon dactylon for their potential anti-rabies activity based on the principle of immunofluorescence. The extracts were tested for cytotoxicity and screened for the presence of phytochemicals. While A. cathartica extracts were found to be non-toxic, the CC50 of C. dactylon (water and methanol) cold extracts were found to be 8.17 and 9.20 mg/mL respectively on BHK-21 cell line. Rapid Fluorescent Focus Inhibition Test (RFFIT) was used to evaluate anti-rabies activities of these plants against the rabies challenge virus standard strain. We observed 50% inhibition of 10 TCID50 CVS at 5 mg/mL (IC50) whereas florescence (no inhibition) was observed with A. cathartica extracts. The present study highlights the use of modified RFFIT as a method of choice for testing anti-rabies activity over assays based on evaluation of cytopathic effect.
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Abstract
The specific HPLC analytical procedure was developed and validated for the determination of phenolic compounds in pear samples of different popular cultivars “Conference,” “Concordia,” “Grabova,” and “Patten.” HPLC mobile phase consisted of 0.05% (v/v) trifluoroacetic acid in water and 100% (v/v) acetonitrile. The HPLC method was used to identify and confirm the specificity of 8 analytes: chlorogenic acid, rutin, hyperoside, isoquercitrin, isorhamnetin rutinoside, quercitrin, quercitrin malonyl glucoside, and isorhamnetin glucoside. Repeatability % RSD did not exceed 3.87%, and intermediate precision did not exceed 4.63%. The total content of phenolic compounds varied from0.51±0.001 mg/g (cv. “Concordia”) to1.11±0.013 mg/g (cv. “Patten”). Chlorogenic acid was the major component in all the tested pear cultivars. The highest amount of chlorogenic acid (0.69±0.033 mg/g) was found in pear samples of the cultivar “Grabova,” and the highest amount of flavonol compounds (1.11±0.013 mg/g) was found in pear samples of the cultivar “Concordia.”
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Dutra RC, Campos MM, Santos AR, Calixto JB. Medicinal plants in Brazil: Pharmacological studies, drug discovery, challenges and perspectives. Pharmacol Res 2016; 112:4-29. [DOI: 10.1016/j.phrs.2016.01.021] [Citation(s) in RCA: 138] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 01/17/2016] [Indexed: 12/16/2022]
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The Anti-Cancer Effect of Polyphenols against Breast Cancer and Cancer Stem Cells: Molecular Mechanisms. Nutrients 2016; 8:nu8090581. [PMID: 27657126 PMCID: PMC5037565 DOI: 10.3390/nu8090581] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 08/25/2016] [Accepted: 09/09/2016] [Indexed: 02/07/2023] Open
Abstract
The high incidence of breast cancer in developed and developing countries, and its correlation to cancer-related deaths, has prompted concerned scientists to discover novel alternatives to deal with this challenge. In this review, we will provide a brief overview of polyphenol structures and classifications, as well as on the carcinogenic process. The biology of breast cancer cells will also be discussed. The molecular mechanisms involved in the anti-cancer activities of numerous polyphenols, against a wide range of breast cancer cells, in vitro and in vivo, will be explained in detail. The interplay between autophagy and apoptosis in the anti-cancer activity of polyphenols will also be highlighted. In addition, the potential of polyphenols to target cancer stem cells (CSCs) via various mechanisms will be explained. Recently, the use of natural products as chemotherapeutics and chemopreventive drugs to overcome the side effects and resistance that arise from using chemical-based agents has garnered the attention of the scientific community. Polyphenol research is considered a promising field in the treatment and prevention of breast cancer.
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Gothai S, Ganesan P, Park SY, Fakurazi S, Choi DK, Arulselvan P. Natural Phyto-Bioactive Compounds for the Treatment of Type 2 Diabetes: Inflammation as a Target. Nutrients 2016; 8:E461. [PMID: 27527213 PMCID: PMC4997374 DOI: 10.3390/nu8080461] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 07/12/2016] [Accepted: 07/15/2016] [Indexed: 02/07/2023] Open
Abstract
Diabetes is a metabolic, endocrine disorder which is characterized by hyperglycemia and glucose intolerance due to insulin resistance. Extensive research has confirmed that inflammation is closely involved in the pathogenesis of diabetes and its complications. Patients with diabetes display typical features of an inflammatory process characterized by the presence of cytokines, immune cell infiltration, impaired function and tissue destruction. Numerous anti-diabetic drugs are often prescribed to diabetic patients, to reduce the risk of diabetes through modulation of inflammation. However, those anti-diabetic drugs are often not successful as a result of side effects; therefore, researchers are searching for efficient natural therapeutic targets with less or no side effects. Natural products' derived bioactive molecules have been proven to improve insulin resistance and associated complications through suppression of inflammatory signaling pathways. In this review article, we described the extraction, isolation and identification of bioactive compounds and its molecular mechanisms in the prevention of diabetes associated complications.
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Affiliation(s)
- Sivapragasam Gothai
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, Serdang 43400, Malaysia.
| | - Palanivel Ganesan
- Nanotechnology Research Center and Department of Applied Life Science, College of Biomedical and Health Science, Konkuk University, Chungju 380-701, Korea.
- Department of Biotechnology, College of Biomedical and Health Science, Konkuk University, Chungju 380-701, Korea.
| | - Shin-Young Park
- Department of Biotechnology, College of Biomedical and Health Science, Konkuk University, Chungju 380-701, Korea.
| | - Sharida Fakurazi
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, Serdang 43400, Malaysia.
- Department of Human Anatomy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang 43400, Malaysia.
| | - Dong-Kug Choi
- Nanotechnology Research Center and Department of Applied Life Science, College of Biomedical and Health Science, Konkuk University, Chungju 380-701, Korea.
- Department of Biotechnology, College of Biomedical and Health Science, Konkuk University, Chungju 380-701, Korea.
| | - Palanisamy Arulselvan
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, Serdang 43400, Malaysia.
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Malik FZA, Allaudin ZN, Loh HS, Nee TK, Hani H, Abdullah R. Antiviral and virucidal activities of Duabanga grandiflora leaf extract against Pseudorabies virus in vitro. Altern Ther Health Med 2016; 16:139. [PMID: 27216794 PMCID: PMC4877979 DOI: 10.1186/s12906-016-1120-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 05/13/2016] [Indexed: 11/10/2022]
Abstract
BACKGROUND Duabanga grandiflora or known in Malaysia as Berembang Bukit, Megawasih, or Pedada Bukit, is a native plant of the Southeast Asian countries. In this study, the anti-viral properties of D. grandiflora were investigated. METHODS The D. grandiflora leaf extracts were obtained with ethyl acetate, hexane, and ethanol as solvents and labelled 37 leaf ethyl acetate (37 L EA), 37 leaf hexane (37 L H), 37 leaf ethanol (37 L ET), respectively. The cytotoxicity of the extracts on Vero cells were determined by the 3-(4,5-Diamethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide (MTT) assay. RESULTS Among extracts, 37 L EA was most cytotoxic to Vero cells, followed by 37 L H and 37 L ET, with CC50 of 218, 833, and >1000 μg/mL, respectively. The cytopathic effect (CPE) and plaque reduction, inhibition, and virucidal assays and the selective index (SI) were employed to determine the effect of the extracts on infectivity and replication of pseudorabies virus (PrV) in Vero cells. The D. grandiflora leaf extracts showed dose-dependent antiviral activities, with higher activities at high doses. The 37 L ET and 37 L EA showed anti-viral effects through plaque formation and viral replication inhibitions, and virucidal property. The SI of the 37 L ET and 37 L EA by the viral replication inhibition assay was 8.3 and 1.9, respectively, and by the CPE reduction assay, 6.7 and 2.9, respectively. CONCLUSION Ethanol is the best solvent for the preparation of D. grandiflora leaf extract as an antiviral agent.
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Anindita PD, Sasaki M, Nobori H, Sato A, Carr M, Ito N, Sugiyama M, Orba Y, Sawa H. Generation of recombinant rabies viruses encoding NanoLuc luciferase for antiviral activity assays. Virus Res 2016; 215:121-8. [DOI: 10.1016/j.virusres.2016.02.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 01/27/2016] [Accepted: 02/05/2016] [Indexed: 12/13/2022]
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Roy S, Mukherjee S, Pawar S, Chowdhary A. Evaluation of In vitro Antiviral Activity of Datura metel Linn. Against Rabies Virus. Pharmacognosy Res 2016; 8:265-269. [PMID: 27695266 PMCID: PMC5004517 DOI: 10.4103/0974-8490.188874] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Objective: The soxhlet and cold extracts of Datura metel Linn. were evaluated for in vitro antirabies activity. Materials and Methods: Soxhlet and cold extraction method were used to extract Datura (fruit and seed) extracts. In vitro cytotoxicity assay was performed by 3-(4,5-dimethylthiazolyl-2)-2,5-diphenyltetrazolium bromide assay. Based on the CC50 range, the in vitro antirabies activity of the extracts was screened by rapid fluorescent focus inhibition test and molecular method. Results: The Datura (fruit and seed) extracts were not cytotoxic below 5 mg/ml (CC50). Titer of 10−4 rabies virus challenge virus standard (RV CVS) (1 50% tissue culture infective dose [1 TCID50]) was obtained by RFFT method and the challenge dose of 10 TCID50 was used for antirabies assay. Datura fruit and seed (soxhlet and cold) extracts showed 50% inhibition of RV CVS at 2.5 mg/ml and 1.25 mg/ml (inhibitory concentration 50% [IC50]), respectively. The tested extracts showed selectivity index (CC50/IC50) ranging from 2 to 4. The viral RNA was extracted and real-time reverse transcription-polymerase chain reaction was performed which also revealed a 2-fold reduction of viral load at 1.25 mg/ml of the Datura seed (soxhlet methanolic and cold aqueous) extracts. Conclusion: To the best of our knowledge, this is the first study of in vitro antiviral activity of D. metel Linn. against rabies virus. Datura seed extracts have a potential in vitro antirabies activity and, in future, can be further screened for in vivo activity against rabies virus in murine model. SUMMARY In the present study, Datura metel. Linn showed and in-vitro anti rabies activity in Vero cell line which was determined by RFFIT method and PCR method
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Affiliation(s)
- Soumen Roy
- Department of Virology, Haffkine Institute for Training, Research and Testing, Parel, Mumbai, Maharashtra, India
| | - Sandeepan Mukherjee
- Department of Virology, Haffkine Institute for Training, Research and Testing, Parel, Mumbai, Maharashtra, India
| | - Sandip Pawar
- Department of Biochemistry, The Institute of Science, Fort, Mumbai, Maharashtra, India
| | - Abhay Chowdhary
- Department of Virology, Haffkine Institute for Training, Research and Testing, Parel, Mumbai, Maharashtra, India
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Hafidh RR, Abdulamir AS, Abu Bakar F, Sekawi Z, Jahansheri F, Jalilian FA. Novel antiviral activity of mung bean sprouts against respiratory syncytial virus and herpes simplex virus -1: an in vitro study on virally infected Vero and MRC-5 cell lines. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 15:179. [PMID: 26062546 PMCID: PMC4461985 DOI: 10.1186/s12906-015-0688-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Accepted: 05/21/2015] [Indexed: 01/26/2023]
Abstract
BACKGROUND New sources for discovering novel antiviral agents are desperately needed. The current antiviral products are both expensive and not very effective. METHODS The antiviral activity of methanol extract of mung bean sprouts (MBS), compared to Ribavarin and Acyclovir, on respiratory syncytial virus (RSV) and Herpes Simplex virus -1 (HSV-1) was investigated using cytotoxicity, virus yield reduction, virucidal activity, and prophylactic activity assays on Vero and MRC-5 cell lines. Moreover, the level of antiviral cytokines, IFNβ, TNFα, IL-1, and IL-6 was assessed in MBS-treated, virally infected, virally infected MBS-treated, and control groups of MRC-5 cells using ELISA. RESULTS MBS extract showed reduction factors (RF) 2.2 × 10 and 0.5 × 10(2) for RSV and HSV-1, respectively. The 2 h incubation virucidal and prophylactic selectivity indices (SI) of MBS on RSV were 14.18 and 12.82 versus Ribavarin SI of 23.39 and 21.95, respectively, and on HSV-1, SI were 18.23 and 10.9 versus Acyclovir, 22.56 and 15.04, respectively. All SI values were >10 indicating that MBS has a good direct antiviral and prophylactic activities on both RSV and HSV-1. Moreover, interestingly, MBS extract induced vigorously IFNβ, TNFα, IL-1, and IL-6 cytokines in MRC-5 infected-treated group far more than other groups (P < 0.05) and induced TNFα and IL-6 in treated group more than infected group (P < 0.05). CONCLUSIONS MBS extract has potent antiviral and to a lesser extent, prophylactic activities against both RSV and HSV-1, and in case of HSV-1, these activities were comparable to Acyclovir. Part of the underlying mechanism(s) of these activities is attributed to MBS potential to remarkably induce antiviral cytokines in human cells. Hence, we infer that MBS methanol extract could be used as such or as purified active component in protecting and treating RSV and HSV-1 infections. More studies are needed to pinpoint the exact active components responsible for the MBS antiviral activities.
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Sun N, Yu T, Zhao JX, Sun YG, Jiang JB, Duan ZB, Wang WK, Hu YL, Lei HM, Li HQ. Antiviral activities of natural compounds derived from traditional chinese medicines against porcine circovirus type 2 (PCV2). BIOTECHNOL BIOPROC E 2015. [DOI: 10.1007/s12257-014-0520-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Silva-Beltrán NP, Ruiz-Cruz S, Chaidez C, Ornelas-Paz JDJ, López-Mata MA, Márquez-Ríos E, Estrada MI. Chemical constitution and effect of extracts of tomato plants byproducts on the enteric viral surrogates. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2015; 25:299-311. [PMID: 25059828 DOI: 10.1080/09603123.2014.938030] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Byproducts of tomato are known to include phenolic compounds but have not been studied in depth. In this study, the phenolic compositions of (stem, leaf, root, and whole plant) of two tomato cultivars, Pitenza and Floradade, were analyzed by HPLC-DAD. In parallel, the antiviral effects of crude extracts on viral surrogates, the bacteriophages MS2 and Av-05 were evaluated. The leaf extracts from the two varieties showed the highest concentration of phenolic compounds. The compounds identified were gallic acid, chlorogenic acid, ferulic acid, cafeic acid, rutin, and quercetin, and they represented 3174.3 and 1057.9 mg/100 g dried weight of the Pitenza and Floradade cultivars, respectively. MS2 and Av-05 titers at 5 mg/mL were reduced by 3.47 and 5.78 log10 PFU/mL and 3.78 and 4.93 log10 PFU/mL by Pitenza and Floradade cultivar leaf extract, respectively. These results show that tomato extracts are natural sources of bioactive substances with antiviral activity.
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Affiliation(s)
- Norma Patricia Silva-Beltrán
- a Instituto Tecnológico de Sonora, Departamento de Biotecnología y Ciencias Alimentarias , Ciudad Obregón , Mexico
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Chattopadhyay D, Ojha D, Mondal S, Goswami D. Validation of Antiviral Potential of Herbal Ethnomedicine. EVIDENCE-BASED VALIDATION OF HERBAL MEDICINE 2015. [PMCID: PMC7150199 DOI: 10.1016/b978-0-12-800874-4.00008-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
Natural products are the basis of treatment since the dawn of human civilization, and modern medicine has gradually developed, over the years, by scientific and observational efforts from traditional medicine. Today most of the synthetic drugs showed adverse and unacceptable side effects, however, impressive bioactivities with reduced toxicities were reported for many botanicals against several chronic or difficult-to-treat diseases. A whole range of viral diseases including human immunodeficiency virus/acquired immunodeficiency syndrome, severe acute respiratory syndrome, Rabies, Dengue, and Herpes need effective drugs. Considerable research has been carried out on the pharmacognosy, chemistry, pharmacology, and therapeutics of traditional medicines of diverse cultures, and many pharmaceutical companies have renewed their strategies for antiviral drug development where no effective drugs or vaccine exist. Thus, phytochemicals with antiviral potentials need to be studied in depth with standardization, chemical isolation, effectivity, molecular mechanism, along with in vivo toxicity and efficacy to reduce cost and time. This review will portray the scientific approaches and methodologies used for the development of antiviral leads from traditional medicines against selected genetically and functionally diverse viral infections.
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Li AN, Li S, Zhang YJ, Xu XR, Chen YM, Li HB. Resources and biological activities of natural polyphenols. Nutrients 2014; 6:6020-47. [PMID: 25533011 PMCID: PMC4277013 DOI: 10.3390/nu6126020] [Citation(s) in RCA: 467] [Impact Index Per Article: 46.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 12/10/2014] [Accepted: 12/12/2014] [Indexed: 02/07/2023] Open
Abstract
The oxidative stress imposed by reactive oxygen species (ROS) plays an important role in many chronic and degenerative diseases. As an important category of phytochemicals, phenolic compounds universally exist in plants, and have been considered to have high antioxidant ability and free radical scavenging capacity, with the mechanism of inhibiting the enzymes responsible for ROS production and reducing highly oxidized ROS. Therefore, phenolic compounds have attracted increasing attention as potential agents for preventing and treating many oxidative stress-related diseases, such as cardiovascular diseases, cancer, ageing, diabetes mellitus and neurodegenerative diseases. This review summarizes current knowledge of natural polyphenols, including resource, bioactivities, bioavailability and potential toxicity.
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Affiliation(s)
- An-Na Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
| | - Sha Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
| | - Yu-Jie Zhang
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
| | - Xiang-Rong Xu
- Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
| | - Yu-Ming Chen
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
| | - Hua-Bin Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
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Javan AJ, Javan MJ. Electronic structure of some thymol derivatives correlated with the radical scavenging activity: Theoretical study. Food Chem 2014; 165:451-9. [DOI: 10.1016/j.foodchem.2014.05.073] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 04/06/2014] [Accepted: 05/14/2014] [Indexed: 11/30/2022]
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Qurat-ul-ain S, Wang W, Yang M, Du N, Wan S, Zhang L, Jiang T. Anomeric selectivity and influenza A virus inhibition study on methoxylated analogues of Pentagalloylglucose. Carbohydr Res 2014; 402:152-7. [PMID: 25498015 DOI: 10.1016/j.carres.2014.10.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 10/14/2014] [Accepted: 10/18/2014] [Indexed: 12/27/2022]
Abstract
Anomeric selectivity in galloylation of D-glucose and D-mannose with carboxylic acid was explored under steglich conditions. Base catalyst 4-dimethylaminopyridine favored the formation of alpha-anomers, while adding an acid and carbodiimide favored the formation of beta-anomers. Steric hindrance between α,β-unsaturated acid and C-2 OH stereochemistry (adjacent carbon to anomeric) influenced anomeric selectivity for both D-glucose and D-mannose. The influenza A virus inhibition activities of the synthesized compounds were evaluated in Madin-Darby canine kidney cell line using the cytopathic effect inhibition assay. All the synthetic methoxylated analogues showed more considerable activity against influenza A virus than their corresponding acids, which indicated the sugar core as key functionality for anti-viral activity. The activities of trimethoxy-cinnamic acid Pentagalloylglucose analogues, 3α, 3β, 4α, and 4β (IC50, 109.1 μM, 134.4 μM, 119.5 μM, 111.1 μM, respectively) were better than those of trimethoxy-benzoic acid Pentagalloylglucose analogues, 1-αβ and 2α, 2β (IC50, 209.8 μM, 132.9 μM, 161.2 μM, respectively), which suggested that the double bond in cinnamic acid Pentagalloylglucose analogues makes the major contribution for influenza A virus inhibitory activity. Notably, several anomeric mixtures showed better activities than pure alpha or beta anomer and were almost two times more effective than Ribavirin, a clinically used anti-viral drug.
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Affiliation(s)
- Shaikh Qurat-ul-ain
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Wei Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Meiting Yang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Na Du
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Shengbiao Wan
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Lijuan Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Tao Jiang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China.
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Escudero LB, Fusari CM, Altamirano JC, Camargo AB, Wuilloud RG. Stability of iron-quercetin complexes in synthetic wine under in vitro digestion conditions. J Food Sci 2014; 79:C1933-8. [PMID: 25181940 DOI: 10.1111/1750-3841.12584] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 07/12/2014] [Indexed: 01/10/2023]
Abstract
UNLABELLED Wine is a dietary source of polyphenolic compounds with reported health benefits when moderately consumed. Several of these compounds can associate with metals forming complexes. Therefore, this work was conducted to reach a better understanding of the nature and chemical stability of wine-derived Fe(3+)-quercetin complexes in a digestion model. The stability of the complexes in a synthetic (simulated) wine was studied before and after in vitro gastric and intestinal digestions by high-performance liquid chromatography (HPLC) with UV-Vis detection. Metal determination was performed by atomic absorption spectrometry (ETAAS) to evaluate possible dissociation of complexes. During HPLC analysis all peaks eluted from the chromatographic column were collected, acidified, and analyzed by ETAAS. The results showed that complexes remain substantially stable after gastric digestion conditions, with recoveries of 84% to 90%. Although metal complexes were partially degraded during intestinal digestion, 41% to 45% of the Fe(3+)-quercetin complexes was recovered. PRACTICAL APPLICATION This work reveals the chemical stability of Fe3+–quercetin complexes in synthetic wines after an in vitro gastrointestinal digestion. The knowledge of this process would be useful to understand the bioavailability of these compounds.
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Affiliation(s)
- Leticia B Escudero
- Laboratory of Analytical Chemistry for Research and Development (QUIANID), Facultad de Ciencias Exactas y Naturales, Univ. Nacional de Cuyo, Padre J. Contreras 1300, Mendoza, 5500, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
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Sun Y, Niu L, Song M, Zhao X, Sun N, He J, Wu C, Jiang J, Bai Y, Guo J, Li H. Screening compounds of Chinese medicinal herbs anti-Marek's disease virus. PHARMACEUTICAL BIOLOGY 2014; 52:841-847. [PMID: 24920229 DOI: 10.3109/13880209.2013.871639] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
CONTEXT Marek's disease (MD) seriously threatens the world poultry industry and has resulted in great economic losses. Chinese medicinal herbs are a rich source for lead compounds and drug candidates for antiviral treatments. OBJECTIVE To investigate the anti-MDV activity and mechanism of 20 compounds extracted from Chinese medicinal herbs. MATERIALS AND METHODS Antiviral assay, time of addition experiments, and virucidal assay were performed on chicken embryo fibroblast cells. The 50% cytotoxic concentration and 50% effective concentration were determined and, accordingly, selectivity index and inhibition ratio were calculated. RESULTS Antiviral assay showed dipotassium glycyrrhizinate (DG) and sodium tanshinone IIA sulfonate (STS) exhibited significantly inhibitory activity against MDV in a dose-dependent manner. EC50 of DG and STS were 893.5 ± 36.99 µg/mL and 54.82 ± 2.99 µg/mL, and selective index (SI) were >3.36 and >9.12, respectively. Time of addition experiment and virucidal assay demonstrated DG inhibited viral replication in the full replication cycle and inactivated MDV particles in non-time-dependent manner, but STS interfered with the early stage of MDV replication and inactivated MDV particles in a time-dependent manner. Moreover, both DG and STS promoted apoptosis of cells infected by MDV. DISCUSSION AND CONCLUSION DG and STS have great potential for developing new anti-MDV drugs for clinic application.
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Affiliation(s)
- Yaogui Sun
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University , Taigu, Shanxi , PR China
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Takai E, Hirano A, Shiraki K. Effects of alkyl chain length of gallate on self-association and membrane binding. J Biochem 2011; 150:165-71. [PMID: 21508039 PMCID: PMC6327286 DOI: 10.1093/jb/mvr048] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Alkyl gallates are anticipated for their use as anti-bacterial and anti-viral agents. Although their pharmacological activities depend on their alkyl chain length, no mechanism has yet been clarified. As described herein, we investigated the membrane binding properties of a series of alkyl gallates using fluorescence measurement to elucidate their different pharmacological activities. Membrane binding of the alkyl gallates increased concomitantly with increasing alkyl chain length, except for cetyl gallate and stearyl gallate. Dynamic light scattering revealed that alkyl gallates with a long alkyl chain are prone to self-association in the solution. Membrane binding abilities of the alkyl gallates are correlated with anti-bacterial and anti-virus activities, as described in previous reports. The partition constants of the alkyl gallates to lipid membranes depend on the membrane components and the membrane phase. Self-association and lipid binding of the alkyl gallates might be primary biophysical factors associated with their pharmacological activities.
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Affiliation(s)
- Eisuke Takai
- Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
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Ozçelik B, Kartal M, Orhan I. Cytotoxicity, antiviral and antimicrobial activities of alkaloids, flavonoids, and phenolic acids. PHARMACEUTICAL BIOLOGY 2011; 49:396-402. [PMID: 21391841 DOI: 10.3109/13880209.2010.519390] [Citation(s) in RCA: 302] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
OBJECTIVE Some natural products consisting of the alkaloids yohimbine and vincamine (indole-type), scopolamine and atropine (tropane-type), colchicine (tropolone-type), allantoin (imidazolidine-type), trigonelline (pyridine-type) as well as octopamine, synephrine, and capsaicin (exocyclic amine-type); the flavonoid derivatives quercetin, apigenin, genistein, naringin, silymarin, and silibinin; and the phenolic acids namely gallic acid, caffeic acid, chlorogenic acid, and quinic acid, were tested for their in vitro antiviral, antibacterial, and antifungal activities and cytotoxicity. MATERIALS AND METHODS Antiviral activity of the compounds was tested against DNA virus herpes simplex type 1 and RNA virus parainfluenza (type-3). Cytotoxicity of the compounds was determined using Madin-Darby bovine kidney and Vero cell lines, and their cytopathogenic effects were expressed as maximum non-toxic concentration. Antibacterial activity was assayed against following bacteria and their isolated strains: Escherichia coli, Pseudomonas aeruginosa, Proteus mirabilis, Klebsiella pneumoniae, Acinetobacter baumannii, Staphylococcus aureus, Enterococcus faecalis, and Bacillus subtilis, although they were screened by microdilution method against two fungi: Candida albicans and Candida parapsilosis. RESULTS Atropine and gallic acid showed potent antiviral effect at the therapeutic range of 0.8-0.05 µg ml(-1), whilst all of the compounds exerted robust antibacterial effect. CONCLUSION Antiviral and antimicrobial effects of the compounds tested herein may constitute a preliminary step for further relevant studies to identify the mechanism of action.
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Affiliation(s)
- Berrin Ozçelik
- Faculty of Pharmacy, Department of Pharmaceutical Microbiology, Gazi University, Ankara, Turkey
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Rodrigo R, Miranda A, Vergara L. Modulation of endogenous antioxidant system by wine polyphenols in human disease. Clin Chim Acta 2010; 412:410-24. [PMID: 21130758 DOI: 10.1016/j.cca.2010.11.034] [Citation(s) in RCA: 173] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Revised: 11/24/2010] [Accepted: 11/25/2010] [Indexed: 02/07/2023]
Abstract
Numerous studies indicate that moderate red wine consumption is associated with a protective effect against all-cause mortality. Since oxidative stress constitutes a unifying mechanism of injury of many types of disease processes, it should be expected that polyphenolic antioxidants account for this beneficial effect. Nevertheless, beyond the well-known antioxidant properties of these compounds, they may exert several other protective mechanisms. Indeed, the overall protective effect of polyphenols is due to their large array of biological actions, such as free radical-scavenging, metal chelation, enzyme modulation, cell signalling pathways modulation and gene expression effects, among others. Wine possesses a variety of polyphenols, being resveratrol its most outstanding representative, due to its pleiotropic biological properties. The presence of ethanol in wine aids to polyphenol absorption, thereby contributing to their bioavailability. Before absorption, polyphenols must be hydrolyzed by intestinal enzymes or by colonic microflora. Then, they undergo intestinal and liver metabolism. There have been no reported polyphenol adverse effects derived from intakes currently associated with the normal diet. However, supplements for health-protection should be cautiously used as no level definition has been given to make sure the dose is safe. The role of oxidative stress and the beneficial effects of wine polyphenols against cardiovascular, cancer, diabetes, microbial, inflammatory, neurodegenerative and kidney diseases and ageing are reviewed. Future large scale randomized clinical trials should be conducted to fully establish the therapeutic use of each individual wine polyphenol against human disease.
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Affiliation(s)
- Ramón Rodrigo
- Institute of Biomedical Sciences, University of Chile, Santiago, Chile.
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Xia EQ, Deng GF, Guo YJ, Li HB. Biological activities of polyphenols from grapes. Int J Mol Sci 2010; 11:622-46. [PMID: 20386657 PMCID: PMC2852857 DOI: 10.3390/ijms11020622] [Citation(s) in RCA: 546] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Revised: 01/26/2010] [Accepted: 01/29/2010] [Indexed: 04/07/2023] Open
Abstract
The dietary consumption of grape and its products is associated with a lower incidence of degenerative diseases such as cardiovascular disease and certain types of cancers. Most recent interest has focused on the bioactive phenolic compounds in grape. Anthocyanins, flavanols, flavonols and resveratrol are the most important grape polyphenols because they possess many biological activities, such as antioxidant, cardioprotective, anticancer, anti-inflammation, antiaging and antimicrobial properties. This review summarizes current knowledge on the bioactivities of grape phenolics. The extraction, isolation and identification methods of polyphenols from grape as well as their bioavailability and potential toxicity also are included.
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Affiliation(s)
- En-Qin Xia
- Department of Nutrition, Sun Yat-Sen University, Guangzhou, China.
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Chattopadhyay D, Sarkar MC, Chatterjee T, Sharma Dey R, Bag P, Chakraborti S, Khan MTH. Recent advancements for the evaluation of anti-viral activities of natural products. N Biotechnol 2009; 25:347-68. [PMID: 19464980 PMCID: PMC7185506 DOI: 10.1016/j.nbt.2009.03.007] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Significant progress has been achieved for the development of novel anti-viral drugs in the recent years. Large numbers of these newly developed drugs belong to three groups of compounds, nucleoside analogues, thymidine kinase-dependent nucleotide analogues and specific viral enzyme inhibitors. It has been found that the natural products, like plant extract, plant-derived compounds (phytochemicals) and so on, as well as traditional medicines, like Ayurvedic, traditional Chinese medicine (TCM), Chakma medicines and so on, are the potential sources for potential and novel anti-viral drugs based on different in vitro and in vivo approaches. In this chapter some of these important approaches utilised in the drug discovery process of potential candidate(s) for anti-viral agents are being discussed. The key conclusion is that natural products are one of the most important sources of novel anti-viral agents.
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Affiliation(s)
- Debprasad Chattopadhyay
- ICMR Virus Unit, I.D. & B.G. Hospital, GB-4, First Floor, 57 Dr Suresh C Banerjee Road, Beliaghata, Kolkata 700010, India
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Tucker G, Robards K. Bioactivity and structure of biophenols as mediators of chronic diseases. Crit Rev Food Sci Nutr 2009; 48:929-66. [PMID: 18949595 DOI: 10.1080/10408390701761977] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Biophenols and their associated activity have generated intense interest. Current topics of debate are their bioavailability and bioactivity. It is generally assumed that their plasma concentrations are insufficient to produce the health benefits previously attributed to their consumption. However, data on localized in vivo concentrations are not available and many questions remain unanswered. Potential mechanisms by which they may exert significant bioactivity are discussed together with structure activity relationships. Biophenols are highly reactive species and they can react with a range of other compounds. Products of their reaction when functioning as antioxidants are examined.
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Affiliation(s)
- Gregory Tucker
- School of Biosciences, University of Nottingham, Loughborough, Leics, UK
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