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Abdelaziz R, Tartor YH, Barakat AB, El-Didamony G, Gado MM, Zaki MSA, Eid RA, El-Samadony HA. Alpha-sitosterol: a new antiviral agent produced by Streptomyces misakiensis and its potential activity against Newcastle disease virus. BMC Vet Res 2024; 20:76. [PMID: 38413949 PMCID: PMC10898069 DOI: 10.1186/s12917-023-03875-y] [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: 09/27/2023] [Accepted: 12/29/2023] [Indexed: 02/29/2024] Open
Abstract
BACKGROUND Newcastle Disease Virus (NDV) causes severe economic losses in the poultry industry worldwide. Hence, this study aimed to discover a novel bioactive antiviral agent for controlling NDV. Streptomyces misakiensis was isolated from Egyptian soil and its secondary metabolites were identified using infrared spectroscopy (IR), gas chromatography-mass spectrometry (GC-MS), and nuclear magnetic resonance (NMR) spectroscopy. The inhibitory activity of bioactive metabolite against NDV were examined. Three experimental groups of 10-day-old specific pathogen-free embryonated chicken eggs (SPF-ECEs), including the bioactive metabolite control group, NDV control positive group, and α-sitosterol and NDV mixture-treated group were inoculated. RESULTS α-sitosterol (Ethyl-6-methylheptan-2-yl]-10,13-dimethyl-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol), a secondary metabolite of S. misakiensis, completely inhibited hemagglutination (HA) activity of the NDV strain. The HA activity of the NDV strain was 8 log2 and 9 log2 for 0.5 and 0.75% RBCs, respectively. The NDV HA activity for the two concentrations of RBCs was significantly (P < 0.0001) inhibited after α-sitosterol treatment. There was a significant (P < 0.0001) decrease in the log 2 of HA activity, with values of - 0.500 (75%, chicken RBCs) before inoculation in SPF-ECEs and - 1.161 (50%, RBCs) and - 1.403 (75%, RBCs) following SPF-ECE inoculation. Compared to ECEs inoculated with NDV alone, the α-sitosterol-treated group showed improvement in histological lesion ratings for chorioallantoic membranes (CAM) and hepatic tissues. The CAM of the α-sitosterol- inoculated SPF-ECEs was preserved. The epithelial and stromal layers were noticeably thicker with extensive hemorrhages, clogged vasculatures, and certain inflammatory cells in the stroma layer in the NDV group. However, mild edema and inflammatory cell infiltration were observed in the CAM of the treated group. ECEs inoculated with α-sitosterol alone showed normal histology of the hepatic acini, central veins, and portal triads. Severe degenerative alterations, including steatosis, clogged sinusoids, and central veins, were observed in ECEs inoculated with NDV. Mild hepatic degenerative alterations, with perivascular round cell infiltration, were observed in the treated group. CONCLUSION To the best of our knowledge, this is the first study to highlight that the potentially bioactive secondary metabolite, α-sitosterol, belonging to the terpene family, has the potential to be a biological weapon against virulent NDV. It could be used for the development of innovative antiviral drugs to control NDV after further clinical investigation.
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Affiliation(s)
- Rewan Abdelaziz
- Department of Microbiology, Faculty of Science, Ain Shams University, Cairo, 11566, Egypt.
| | - Yasmine H Tartor
- Department of Microbiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, 44511, Egypt.
| | - Ahmed B Barakat
- Department of Microbiology, Faculty of Science, Ain Shams University, Cairo, 11566, Egypt
| | - Gamal El-Didamony
- Department of Botany and Microbiology, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt
| | - Marwa M Gado
- Department of Microbiology, Faculty of Science, Ain Shams University, Cairo, 11566, Egypt
| | - Mohamed Samir A Zaki
- Anatomy Department, College of Medicine, King Khalid University, P.O. Box 62529, Abha, Saudi Arabia
| | - Refaat A Eid
- Department of Pathology, College of Medicine, King Khalid University, Abha, 12573, Saudi Arabia
| | - Hanaa A El-Samadony
- Department of Poultry, Animal Health Research Institute, Dokki, Agriculture Research Center, Giza, 44511, Egypt
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Rouf R, Uddin SJ, Sarker DK, Islam MT, Ali ES, Shilpi JA, Nahar L, Tiralongo E, Sarker SD. Antiviral potential of garlic ( Allium sativum) and its organosulfur compounds: A systematic update of pre-clinical and clinical data. Trends Food Sci Technol 2020; 104:219-234. [PMID: 32836826 PMCID: PMC7434784 DOI: 10.1016/j.tifs.2020.08.006] [Citation(s) in RCA: 101] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 08/05/2020] [Accepted: 08/08/2020] [Indexed: 01/07/2023]
Abstract
BACKGROUND Garlic (Allium sativum L.) is a common herb consumed worldwide as functional food and traditional remedy for the prevention of infectious diseases since ancient time. Garlic and its active organosulfur compounds (OSCs) have been reported to alleviate a number of viral infections in pre-clinical and clinical investigations. However, so far no systematic review on its antiviral effects and the underlying molecular mechanisms exists. SCOPE AND APPROACH The aim of this review is to systematically summarize pre-clinical and clinical investigations on antiviral effects of garlic and its OSCs as well as to further analyse recent findings on the mechanisms that underpin these antiviral actions. PubMed, Cochrane library, Google Scholar and Science Direct databases were searched and articles up to June 2020 were included in this review. KEY FINDINGS AND CONCLUSIONS Pre-clinical data demonstrated that garlic and its OSCs have potential antiviral activity against different human, animal and plant pathogenic viruses through blocking viral entry into host cells, inhibiting viral RNA polymerase, reverse transcriptase, DNA synthesis and immediate-early gene 1(IEG1) transcription, as well as through downregulating the extracellular-signal-regulated kinase (ERK)/mitogen activated protein kinase (MAPK) signaling pathway. The alleviation of viral infection was also shown to link with immunomodulatory effects of garlic and its OSCs. Clinical studies further demonstrated a prophylactic effect of garlic in the prevention of widespread viral infections in humans through enhancing the immune response. This review highlights that garlic possesses significant antiviral activity and can be used prophylactically in the prevention of viral infections.
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Key Words
- AGE, Aged garlic extract
- AIV-H9N2, Avian influenza virus-H9N2
- ALT, Alanine aminotransferase
- ARVI, Acute respiratory viral infection
- AdV-3, Adenovirus-3
- AdV-41, Adenovirus-41
- Allium sativum
- CBV-3, Coxsackie B −3
- CPE, Cytopathic effect
- CoV, Coronavirus
- DADS, Diallyl disulfide
- DAS, Diallyl sulfide
- DATS, Diallyl trisulfide
- DDB, Dimethyl-4,4′-dimethoxy-5,6,5′,6′-dimethylene dioxybiphenyl-2,2′-dicarboxylate
- ECHO11, Echovirus-11
- ECM, Extracellular matrix
- ERK, Extracellular-signal-regulated kinase
- FDA, Food and drug administration
- Functional food
- GE, Garlic extract
- GLRaV‐2, Grapevine leafroll‐associated virus 2
- GO, Garlic oil
- GRAS, Generally regarded as safe
- HAV, Hepatitis A virus
- HCMV, Human cytomegalovirus
- HIV-1, Human immunodeficiency virus-1
- HPV, Influenza B virus Human papillomavirus
- HRV-2, Human rhinovirus type 2
- HSV-1, Herpes simplex virus-1
- HSV-2, Herpes simplex virus-2
- Hp, Haptoglobin
- IAV-H1N1, IBV Influenza A virus-H1N1
- IEG1, Immediate-early gene 1
- IEGs, Immediate-early genes
- Immunomodulatory
- LGE, Lipid garlic extract
- MAPK, Mitogen activated protein kinase
- MARS-CoV, Middle East respiratory syndrome coronavirus
- MDCK cells, Madin-darby canine kidney cells
- MeV, Measles virus
- NA, Not available
- NDV, Newcastle disease virus
- NK, Natural killer
- OSCs, Organosulfur compounds
- Organosulfur compounds
- PGE, Powdered garlic extract
- PIV- 3, Parainfluenza virus-3
- PRRSV, Porcine reproductive and respiratory syndrome virus
- PRV, Porcine Rotavirus
- PVY, Potato Virus Y
- Pandemic
- RCTs, Randomized clinical trials
- RMCW, Recalcitrant multiple common warts
- RV-SA-11, Rotavirus SA-11
- SAC, Serum antioxidant concentration
- SAMC, S-allyl-mercaptocysteine
- SAMG, S-allyl-mercapto-glutathione
- SARS-CoV, Severe acute respiratory syndrome coronavirus
- SI, Selectivity index
- SRGE, Sustained release garlic extract
- SWV, Spotted wilt virus
- VSV, Vesicular stomatitis virus
- VV, Vaccinia virus
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Affiliation(s)
- Razina Rouf
- Department of Pharmacy, Faculty of Life Science, Bangabandhu Sheikh Mujibur Rahman Science & Technology University, Gopalganj, 8100, Bangladesh
| | - Shaikh Jamal Uddin
- Laboratory of Theoretical and Computational Biophysics, Ton Duc Thang University, Ho Chi Minh City, 700000, Viet Nam.,Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, 700000, Viet Nam
| | - Dipto Kumer Sarker
- Pharmacy Discipline, Life Science School, Khulna University, Khulna 9208, Bangladesh
| | - Muhammad Torequl Islam
- Department of Pharmacy, Faculty of Life Science, Bangabandhu Sheikh Mujibur Rahman Science & Technology University, Gopalganj, 8100, Bangladesh
| | - Eunus S Ali
- Department of Biochemistry and Molecular Genetics, Northwestern University, Chicago, IL 60611, USA
| | - Jamil A Shilpi
- Pharmacy Discipline, Life Science School, Khulna University, Khulna 9208, Bangladesh
| | - Lutfun Nahar
- Centre for Natural Products Discovery, School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, James Parsons Building, Byrom Street, Liverpool, L3 3AF, UK
| | - Evelin Tiralongo
- School of Pharmacy and Pharmacology, Griffith University, Southport, Qld, Australia
| | - Satyajit D Sarker
- Centre for Natural Products Discovery, School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, James Parsons Building, Byrom Street, Liverpool, L3 3AF, UK
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Ai H, Wu X, Qi M, Zhang L, Hu H, Zhao Q, Zhao J, Liu H. Study on the Mechanisms of Active Compounds in Traditional Chinese Medicine for the Treatment of Influenza Virus by Virtual Screening. Interdiscip Sci 2018; 10:320-328. [PMID: 29500549 DOI: 10.1007/s12539-018-0289-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 02/23/2018] [Indexed: 12/28/2022]
Abstract
In recent years, new strains of influenza virus such as H7N9, H10N8, H5N6 and H5N8 had continued to emerge. There was an urgent need for discovery of new anti-influenza virus drugs as well as accurate and efficient large-scale inhibitor screening methods. In this study, we focused on six influenza virus proteins that could be anti-influenza drug targets, including neuraminidase (NA), hemagglutinin (HA), matrix protein 1 (M1), M2 proton channel (M2), nucleoprotein (NP) and non-structural protein 1 (NS1). Structure-based molecular docking was utilized to identify potential inhibitors for these drug targets from 13144 compounds in the Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform. The results showed that 56 compounds could inhibit more than two drug targets simultaneously. Further, we utilized reverse docking to study the interaction of these compounds with host targets. Finally, the 22 compound inhibitors could stably bind to host targets with high binding free energy. The results showed that the Chinese herbal medicines had a multi-target effect, which could directly inhibit influenza virus by the target viral protein and indirectly inhibit virus by the human target protein. This method was of great value for large-scale virtual screening of new anti-influenza virus compounds.
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Affiliation(s)
- Haixin Ai
- Research Center for Computer Simulating and Information Processing of Bio-macromolecules of Shenyang, Engineering Laboratory for Molecular Simulation and Designing of Drug Molecules of Liaoning, Shenyang, 110036, China
- School of Life Science, Liaoning University, Shenyang, 110036, China
| | - Xuewei Wu
- Research Center for Computer Simulating and Information Processing of Bio-macromolecules of Shenyang, Engineering Laboratory for Molecular Simulation and Designing of Drug Molecules of Liaoning, Shenyang, 110036, China
- School of Life Science, Liaoning University, Shenyang, 110036, China
| | - Mengyuan Qi
- School of Life Science, Liaoning University, Shenyang, 110036, China
| | - Li Zhang
- School of Life Science, Liaoning University, Shenyang, 110036, China
| | - Huan Hu
- School of Life Science, Liaoning University, Shenyang, 110036, China
| | - Qi Zhao
- School of Mathematics, Liaoning University, Shenyang, 110036, China
| | - Jian Zhao
- School of Life Science, Liaoning University, Shenyang, 110036, China
| | - Hongsheng Liu
- Research Center for Computer Simulating and Information Processing of Bio-macromolecules of Shenyang, Engineering Laboratory for Molecular Simulation and Designing of Drug Molecules of Liaoning, Shenyang, 110036, China.
- School of Life Science, Liaoning University, Shenyang, 110036, China.
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Markov AV, Sen'kova AV, Warszycki D, Salomatina OV, Salakhutdinov NF, Zenkova MA, Logashenko EB. Soloxolone methyl inhibits influenza virus replication and reduces virus-induced lung inflammation. Sci Rep 2017; 7:13968. [PMID: 29070858 PMCID: PMC5656677 DOI: 10.1038/s41598-017-14029-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 10/05/2017] [Indexed: 12/14/2022] Open
Abstract
Highly pathogenic influenza viruses pose a serious public health threat to humans. Although vaccines are available, new antivirals are needed to efficiently control disease progression and virus transmission due to the emergence of drug-resistant viral strains. In this study, we describe the anti-viral properties of Soloxolone methyl (SM) (methyl 2-cyano-3,12-dioxo-18βH-olean-9(11),1(2)-dien-30-oate, a chemical derivative of glycyrrhetinic acid) against the flu virus. Anti-flu efficacy studies revealed that SM exhibits antiviral activity against the H1N1 influenza A virus in a dose-dependent manner causing a more than 10-fold decrease in virus titer and a reduction in the expression of NP and M2 viral proteins. In a time-of-addition study, SM was found to act at an early stage of infection to exhibit an inhibitory effect on both the attachment step and virus uptake into cells. Also, in infected cells SM downregulates the expression of the inflammatory cytokines IL-6 and TNF-α. In infected mice, SM administered intranasally prior to and after infection significantly decreases virus titers in the lung and prevents post-challenge pneumonia. Together, these results suggest that Soloxolone methyl might serve as an effective therapeutic agent to manage influenza outbreaks and virus-associated complications, and further preclinical and clinical investigation may be warranted.
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Affiliation(s)
- Andrey V Markov
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch Russian Academy of Sciences, 8, Lavrent'ev ave., Novosibirsk, 630090, Russian Federation
| | - Alexandra V Sen'kova
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch Russian Academy of Sciences, 8, Lavrent'ev ave., Novosibirsk, 630090, Russian Federation
| | - Dawid Warszycki
- Institute of Pharmacology, Polish Academy of Sciences, 12, Smętna street, Kraków, 31-343, Poland
| | - Oksana V Salomatina
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch Russian Academy of Sciences, 9, Lavrent'ev ave., Novosibirsk, 630090, Russian Federation
| | - Nariman F Salakhutdinov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch Russian Academy of Sciences, 9, Lavrent'ev ave., Novosibirsk, 630090, Russian Federation
| | - Marina A Zenkova
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch Russian Academy of Sciences, 8, Lavrent'ev ave., Novosibirsk, 630090, Russian Federation
| | - Evgeniya B Logashenko
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch Russian Academy of Sciences, 8, Lavrent'ev ave., Novosibirsk, 630090, Russian Federation.
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Chinese Herbal Medicine Meets Biological Networks of Complex Diseases: A Computational Perspective. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 2017:7198645. [PMID: 28690664 PMCID: PMC5485337 DOI: 10.1155/2017/7198645] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Accepted: 05/15/2017] [Indexed: 12/25/2022]
Abstract
With the rapid development of cheminformatics, computational biology, and systems biology, great progress has been made recently in the computational research of Chinese herbal medicine with in-depth understanding towards pharmacognosy. This paper summarized these studies in the aspects of computational methods, traditional Chinese medicine (TCM) compound databases, and TCM network pharmacology. Furthermore, we chose arachidonic acid metabolic network as a case study to demonstrate the regulatory function of herbal medicine in the treatment of inflammation at network level. Finally, a computational workflow for the network-based TCM study, derived from our previous successful applications, was proposed.
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Virtual screening of potential inhibitors from TCM for the CPSF30 binding site on the NS1A protein of influenza A virus. J Mol Model 2014; 20:2142. [PMID: 24562912 DOI: 10.1007/s00894-014-2142-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 01/10/2014] [Indexed: 10/25/2022]
Abstract
Inhibition of CPSF30 function by the effector domain of influenza A virus of non-structural protein 1 (NS1A) protein plays a critical role in the suppression of host key antiviral response. The CPSF30-binding site of NS1A appears to be a very attractive target for the development of new drugs against influenza A virus. In this study, structure-based molecular docking was utilized to screen more than 30,000 compounds from a Traditional Chinese Medicine (TCM) database. Four drug-like compounds were selected as potential inhibitors for the CPSF30-binding site of NS1A. Docking conformation analysis results showed that these potential inhibitors could bind to the CPSF30-binding site with strong hydrophobic interactions and weak hydrogen bonds. Molecular dynamics simulations and MM-PBSA calculations suggested that two of the inhibitors, compounds 32056 and 31674, could stably bind to the CPSF30-binding site with high binding free energy. These two compounds could be modified to achieve higher binding affinity, so that they may be used as potential leads in the development of new anti-influenza drugs.
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Rajasekaran D, Palombo EA, Yeo TC, Ley DLS, Tu CL, Malherbe F, Grollo L. Evidence of Synergistic Activity of Medicinal Plant Extracts against Neuraminidase Inhibitor Resistant Strains of Influenza Viruses. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/aim.2014.416136] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Rajasekaran D, Palombo EA, Chia Yeo T, Lim Siok Ley D, Lee Tu C, Malherbe F, Grollo L. Identification of traditional medicinal plant extracts with novel anti-influenza activity. PLoS One 2013; 8:e79293. [PMID: 24312177 PMCID: PMC3842314 DOI: 10.1371/journal.pone.0079293] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Accepted: 09/16/2013] [Indexed: 11/18/2022] Open
Abstract
The emergence of drug resistant variants of the influenza virus has led to a need to identify novel and effective antiviral agents. As an alternative to synthetic drugs, the consolidation of empirical knowledge with ethnopharmacological evidence of medicinal plants offers a novel platform for the development of antiviral drugs. The aim of this study was to identify plant extracts with proven activity against the influenza virus. Extracts of fifty medicinal plants, originating from the tropical rainforests of Borneo used as herbal medicines by traditional healers to treat flu-like symptoms, were tested against the H1N1 and H3N1 subtypes of the virus. In the initial phase, in vitro micro-inhibition assays along with cytotoxicity screening were performed on MDCK cells. Most plant extracts were found to be minimally cytotoxic, indicating that the compounds linked to an ethnomedical framework were relatively innocuous, and eleven crude extracts exhibited viral inhibition against both the strains. All extracts inhibited the enzymatic activity of viral neuraminidase and four extracts were also shown to act through the hemagglutination inhibition (HI) pathway. Moreover, the samples that acted through both HI and neuraminidase inhibition (NI) evidenced more than 90% reduction in virus adsorption and penetration, thereby indicating potent action in the early stages of viral replication. Concurrent studies involving Receptor Destroying Enzyme treatments of HI extracts indicated the presence of sialic acid-like component(s) that could be responsible for hemagglutination inhibition. The manifestation of both modes of viral inhibition in a single extract suggests that there may be a synergistic effect implicating more than one active component. Overall, our results provide substantive support for the use of Borneo traditional plants as promising sources of novel anti-influenza drug candidates. Furthermore, the pathways involving inhibition of hemagglutination could be a solution to the global occurrence of viral strains resistant to neuraminidase drugs.
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Affiliation(s)
- Dhivya Rajasekaran
- Environment and Biotechnology Centre, Faculty of Life and Social sciences, Swinburne University of Technology, Hawthorn VIC, Australia
| | - Enzo A. Palombo
- Environment and Biotechnology Centre, Faculty of Life and Social sciences, Swinburne University of Technology, Hawthorn VIC, Australia
| | | | | | - Chu Lee Tu
- Sarawak Biodiversity Centre, Kuching, Sarawak, Malaysia
| | - Francois Malherbe
- Environment and Biotechnology Centre, Faculty of Life and Social sciences, Swinburne University of Technology, Hawthorn VIC, Australia
| | - Lara Grollo
- Environment and Biotechnology Centre, Faculty of Life and Social sciences, Swinburne University of Technology, Hawthorn VIC, Australia
- * E-mail:
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Yang Z, Yang Y, Wu F, Feng X. Computational investigation of interaction mechanisms between juglone and influenza virus surface glycoproteins. MOLECULAR SIMULATION 2013. [DOI: 10.1080/08927022.2013.769683] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Tan J, Chu J, Hao Y, Wang Y, Yao S, Zhuang Y, Zhang S. A high-throughput screening strategy for accurate quantification of erythromycin. J Taiwan Inst Chem Eng 2013. [DOI: 10.1016/j.jtice.2012.12.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ou CB, Pan Q, Pang Q, Chen X, Hou N, He C. Protocatechuic acid, a new active substance against the challenge of avian infectious bursal disease virus. Poult Sci 2012; 91:1604-9. [PMID: 22700505 DOI: 10.3382/ps.2011-02069] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The present study aims to investigate the potential antiviral activity of protocatechuic acid (PCA) and its mechanism against infectious bursal disease virus (IBDV) infection. In the curative test, dosages of PCA of 40, 20, and 10 mg/kg, the survival rate was 90, 90, and 60%, respectively, and the BW gain was 36.63, 31.85, and 51.8%, respectively. The survival rate for the Astragalus polysaccharide (ASP) group was significantly lower than those of the birds treated with 20 mg/kg or 40 mg/kg of PCA. The bursa indeces of chickens in 40 mg/kg, 20 mg/kg, and ASP groups were significantly higher than that of the infection group, whereas a significant increase of the spleen index was found in birds with 20 mg/kg PCA in comparison with other challenged groups. The birds treated with 20 mg/kg or 40 mg/kg of 3,4-dihydroxybenzoic acid also showed slightly higher levels of IBDV clearance in the bursa of Fabricius. Furthermore, the chickens treated with 20 mg/kg of PCA induced a significant lymphocyte proliferation and a significant increase in the CD4+/CD8+ ratio in comparison with the ASP chickens. These results imply that chickens treated with 20 mg/kg of PCA for 5 d could effectively induce active nonspecific immune responses against the IBDV infection.
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Affiliation(s)
- C B Ou
- College of Veterinary Medicine, China Agricultural University, Beijing, China
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