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Wang X, Qiu W, Hu G, Diao X, Li Y, Li Y, Li P, Liu Y, Feng Y, Xue C, Cao Y, Xu Z. NS7a of SADS-CoV promotes viral infection via inducing apoptosis to suppress type III interferon production. J Virol 2024; 98:e0031724. [PMID: 38624231 PMCID: PMC11092342 DOI: 10.1128/jvi.00317-24] [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: 02/20/2024] [Accepted: 03/10/2024] [Indexed: 04/17/2024] Open
Abstract
Swine acute diarrhea syndrome coronavirus (SADS-CoV) is a newly discovered swine coronavirus with potential cross-species transmission risk. Although SADS-CoV-induced host cell apoptosis and innate immunity antagonization has been revealed, underlying signaling pathways remain obscure. Here, we demonstrated that infection of SADS-CoV induced apoptosis in vivo and in vitro, and that viral protein NS7a is mainly responsible for SADS-CoV-induced apoptosis in host cells. Furthermore, we found that NS7a interacted with apoptosis-inducing factor mitochondria associated 1 (AIFM1) to activate caspase-3 via caspase-6 in SADS-CoV-infected cells, and enhanced SADS-CoV replication. Importantly, NS7a suppressed poly(I:C)-induced expression of type III interferon (IFN-λ) via activating caspase-3 to cleave interferon regulatory factor 3 (IRF3), and caspase-3 inhibitor protects piglets against SADS-CoV infection in vivo. These findings reveal how SADS-CoV induced apoptosis to inhibit innate immunity and provide a valuable clue to the development of effective drugs for the clinical control of SADS-CoV infection.IMPORTANCEOver the last 20 years, multiple animal-originated coronaviruses, including severe acute respiratory syndrome coronavirus (SARS-CoV), middle east respiratory syndrome coronavirus (MERS-CoV), and SARS-CoV-2, have caused millions of deaths, seriously jeopardized human health, and hindered social development, indicating that the study of animal-originated coronaviruses with potential for cross-species transmission is particularly important. Bat-originated swine acute diarrhea syndrome coronavirus (SADS-CoV), discovered in 2017, can not only cause fatal diarrhea in piglets, but also infect multiple human cells, with a potential risk of cross-species transmission, but its pathogenesis is unclear. In this study, we demonstrated that NS7a of SADS-CoV suppresses IFN-λ production via apoptosis-inducing factor mitochondria associated 1 (AIFM1)-caspase-6-caspase-3-interferon regulatory factor 3 (IRF3) pathway, and caspase-3 inhibitor (Z-DEVD-FMK) can effectively inhibit SADS-CoV replication and protect infected piglets. Our findings in this study contribute to a better understanding of SADS-CoV-host interactions as a part of the coronaviruses pathogenesis and using apoptosis-inhibitor as a drug as potential therapeutic approaches for prevention and control of SADS-CoV infection.
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Affiliation(s)
- Xiaowei Wang
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, China
| | - Wenjing Qiu
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, China
| | - Guangli Hu
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, China
| | - Xiaoyuan Diao
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, China
| | - Yunfei Li
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, China
| | - Yue Li
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, China
| | - Peng Li
- Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, USA
| | - Yufang Liu
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, China
| | - Yongtong Feng
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, China
| | - Chunyi Xue
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, China
| | - Yongchang Cao
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, China
| | - Zhichao Xu
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, China
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Zheng S, Wang X, Hu H, Xia Y, Diao X, Qiu W, Xue C, Cao Y, Xu Z. Emodin from Aloe inhibits Swine acute diarrhea syndrome coronavirus in cell culture. Front Vet Sci 2022; 9:978453. [PMID: 36061121 PMCID: PMC9433657 DOI: 10.3389/fvets.2022.978453] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 07/27/2022] [Indexed: 11/13/2022] Open
Abstract
Swine acute diarrhea syndrome coronavirus (SADS-CoV) is an emerging swine enteropathogenic coronavirus that causes severe diarrhea in neonatal piglets, leading to serious economic losses to the pig industries. At present, there are no effective control measures for SADS, making an urgent need to exploit effective antiviral therapies. Here, we confirmed that Aloe extract (Ae) can strongly inhibit SADS-CoV in Vero and IPI-FX cells in vitro. Furthermore, we detected that Emodin from Ae had anti-SADS-CoV activity in cells but did not impair SADS-CoV infectivity directly. The time-of-addition assay showed that Emodin inhibits SADS-CoV infection at the whole stages of the viral replication cycle. Notably, we found that Emodin can significantly reduce virus particles attaching to the cell surface and induce TLR3 (p < 0.001), IFN-λ3 (p < 0.01), and ISG15 (p < 0.01) expressions in IPI-FX cells, indicating that the anti-SADS-CoV activity of Emodin might be due to blocking viral attachment and the activation of TLR3-IFN-λ3-ISG15 signaling axis. These results suggest that Emodin has the potential value for the development of anti-SADS-CoV drugs.
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Makoschey B, Berge AC. Review on bovine respiratory syncytial virus and bovine parainfluenza - usual suspects in bovine respiratory disease - a narrative review. BMC Vet Res 2021; 17:261. [PMID: 34332574 PMCID: PMC8325295 DOI: 10.1186/s12917-021-02935-5] [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: 10/01/2020] [Accepted: 06/10/2021] [Indexed: 12/26/2022] Open
Abstract
Bovine Respiratory Syncytial virus (BRSV) and Bovine Parainfluenza 3 virus (BPIV3) are closely related viruses involved in and both important pathogens within bovine respiratory disease (BRD), a major cause of morbidity with economic losses in cattle populations around the world. The two viruses share characteristics such as morphology and replication strategy with each other and with their counterparts in humans, HRSV and HPIV3. Therefore, BRSV and BPIV3 infections in cattle are considered useful animal models for HRSV and HPIV3 infections in humans. The interaction between the viruses and the different branches of the host’s immune system is rather complex. Neutralizing antibodies seem to be a correlate of protection against severe disease, and cell-mediated immunity is thought to be essential for virus clearance following acute infection. On the other hand, the host’s immune response considerably contributes to the tissue damage in the upper respiratory tract. BRSV and BPIV3 also have similar pathobiological and epidemiological features. Therefore, combination vaccines against both viruses are very common and a variety of traditional live attenuated and inactivated BRSV and BPIV3 vaccines are commercially available.
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Affiliation(s)
- Birgit Makoschey
- Intervet International BV/MSD-Animal Health, Wim de Körverstraat, 5831AN, Boxmeer, The Netherlands.
| | - Anna Catharina Berge
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, 9820, Merelbeke, Belgium
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4
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Xu Z, Huang M, Xia Y, Peng P, Zhang Y, Zheng S, Wang X, Xue C, Cao Y. Emodin from Aloe Inhibits Porcine Reproductive and Respiratory Syndrome Virus via Toll-Like Receptor 3 Activation. Viruses 2021; 13:v13071243. [PMID: 34206896 PMCID: PMC8310261 DOI: 10.3390/v13071243] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/15/2021] [Accepted: 06/15/2021] [Indexed: 12/11/2022] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) causes severe reproductive failure in sows and respiratory diseases in growing and finishing pigs and results in great economic losses to the swine industry. Although vaccines are available, PRRSV remains a major threat to the pig farms. Thus, there is an urgent need to develop antiviral drugs to compensate for vaccines. In this study, we report that Aloe extract (Ae) can strongly inhibit PRRSV in Marc-145 cells and porcine alveolar macrophages lines (iPAMs) in vitro. Furthermore, we identified a novel anti-PRRSV molecule, Emodin, from Ae by high-performance liquid chromatography (HPLC). Emodin exerted its inhibitory effect through targeting the whole stages of PRRSV infectious cycle. Moreover, we also found that Emodin can inactivate PRRSV particles directly. Notably, we confirmed that Emodin was able to significantly induce Toll-like receptor 3 (TLR3) (p < 0.01), IFN-α (p < 0.05) and IFN-β expression in iPAMs, indicating that induction of antiviral agents via TLR3 activation by Emodin might contribute to its anti-PRRSV effect. These findings imply that the Emodin from Aloe could hamper the proliferation of PRRSV in vitro and might constitute a new approach for treating PRRSV infection.
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Affiliation(s)
- Zhichao Xu
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou 510006, China; (Z.X.); (M.H.); (Y.X.); (P.P.); (Y.Z.); (S.Z.); (X.W.); (C.X.)
| | - Meiyan Huang
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou 510006, China; (Z.X.); (M.H.); (Y.X.); (P.P.); (Y.Z.); (S.Z.); (X.W.); (C.X.)
| | - Yongbo Xia
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou 510006, China; (Z.X.); (M.H.); (Y.X.); (P.P.); (Y.Z.); (S.Z.); (X.W.); (C.X.)
| | - Peng Peng
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou 510006, China; (Z.X.); (M.H.); (Y.X.); (P.P.); (Y.Z.); (S.Z.); (X.W.); (C.X.)
| | - Yun Zhang
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou 510006, China; (Z.X.); (M.H.); (Y.X.); (P.P.); (Y.Z.); (S.Z.); (X.W.); (C.X.)
| | - Shumei Zheng
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou 510006, China; (Z.X.); (M.H.); (Y.X.); (P.P.); (Y.Z.); (S.Z.); (X.W.); (C.X.)
| | - Xiaowei Wang
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou 510006, China; (Z.X.); (M.H.); (Y.X.); (P.P.); (Y.Z.); (S.Z.); (X.W.); (C.X.)
| | - Chunyi Xue
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou 510006, China; (Z.X.); (M.H.); (Y.X.); (P.P.); (Y.Z.); (S.Z.); (X.W.); (C.X.)
| | - Yongchang Cao
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou 510006, China; (Z.X.); (M.H.); (Y.X.); (P.P.); (Y.Z.); (S.Z.); (X.W.); (C.X.)
- School of Life Science, Sun Yat-sen University, Higher Education Mega Center, Guangzhou 510006, China
- Correspondence: ; Tel.: +86-(20)-3933-2938; Fax: +86-(20)-3933-2841
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Li Q, Liu Y, Xu S, Zhao K, Ling Y, Liu R, Ali A, Bai J. Caveolin-1 is involved in encephalomyocarditis virus replication in BHK-21 cells. Virol J 2021; 18:63. [PMID: 33761945 PMCID: PMC7989721 DOI: 10.1186/s12985-021-01521-3] [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: 10/23/2020] [Accepted: 03/02/2021] [Indexed: 11/23/2022] Open
Abstract
Background Encephalomyocarditis virus, member of Cardiovirus genus within Picornaviridae family, is an important pathogen that infects different domestic and wild animals. However, the molecular mechanism of its entry remains unclear. In this study, we investigated the mechanism of EMCV infectivity in relation to endocytic pathway using BHK-21 cells. Methods The function of numerous cellular key factors implicated in the various endocytic mechanisms were systematically explored using chemical inhibitors. Furthermore, RNA interference (RNAi) as well as the overexpression of dominant protein combined to virus infectivity assays, and confocal microscopy was used to examine EMCV infection in details. Results The results indicated that the EMCV entry into BHK-21 cells depends on caveolin, dynamin, and actin but not clathrin nor macropinocytosis pathways. The effects of overexpression and knockdown of caveolin-1, one components of the caveolae, was examined on EMCV infection. The results showed that EMCV infection was positive correlation with caveolin-1 expression. Confocal microscopy analysis and internalization assay showed that caveolin-1 is required at the early stage of EMCV infection. Conclusions Caveolin-1, dynamin, and actin-dependent endocytosis pathways are necessary for EMCV infection in vitro.
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Affiliation(s)
- Qiongyi Li
- Biomedical Research Center, Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Northwest Minzu University, Lanzhou, China.,College of Life Science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Yang Liu
- Biomedical Research Center, Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Northwest Minzu University, Lanzhou, China.,College of Life Science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Shujuan Xu
- Biomedical Research Center, Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Northwest Minzu University, Lanzhou, China.,College of Life Science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Kexue Zhao
- Biomedical Research Center, Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Northwest Minzu University, Lanzhou, China.,College of Life Science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Ying Ling
- College of Life Science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Rongxiu Liu
- College of Life Science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Amjad Ali
- Biomedical Research Center, Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Northwest Minzu University, Lanzhou, China
| | - Jialin Bai
- Biomedical Research Center, Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Northwest Minzu University, Lanzhou, China. .,College of Life Science and Engineering, Northwest Minzu University, Lanzhou, China.
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Xu Z, Liu Y, Peng P, Liu Y, Huang M, Ma Y, Xue C, Cao Y. Aloe extract inhibits porcine epidemic diarrhea virus in vitro and in vivo. Vet Microbiol 2020; 249:108849. [PMID: 32979750 PMCID: PMC7491386 DOI: 10.1016/j.vetmic.2020.108849] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 09/08/2020] [Indexed: 12/15/2022]
Abstract
Porcine epidemic diarrhea virus (PEDV) causes severe diarrhoea and high mortality in neonatal suckling piglets, leading to significant economic losses to the swine industry. Currently there are no adequate control strategies against circulating PEDV variants, making an urgent need to exploit effect antiviral therapies to compensate for vaccines. Here, we report that Aloe extract can hamper completely the proliferation of PEDV at a non-cytotoxic concentration of 16 mg/mL determined by CCK-8 assay in Vero and IPEC-J2 cells in vitro. Furthermore, time course analysis indicated the extract exerted its inhibition at the late stage of the viral life cycle. Moreover, we also confirmed that the extract can inactivated PEDV directly but did not act on the viral genome and S1 protein. Importantly, the extract at a relatively safety concentration of 100 mg/kg of body weight, which was confirmed in mice, could reduce virus load and pathological change in intestinal tract of pigs and protect newborn piglets from lethal challenge with highly pathogenic PEDV variant GDS01 infection, indicating that Aloe extract efficiently inhibited PEDV infection in vivo. Collectively, our findings suggest that the aqueous extract from the Aloe could inhibit PEDV replication in vitro and in vivo and might be a good target for drug development against PEDV.
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Affiliation(s)
- Zhichao Xu
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, 510006, China
| | - Yuan Liu
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, 510006, China
| | - Peng Peng
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, 510006, China
| | - Yufang Liu
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, 510006, China
| | - Meiyan Huang
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, 510006, China
| | - Yehuan Ma
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, 510006, China
| | - Chunyi Xue
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, 510006, China
| | - Yongchang Cao
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou, 510006, China.
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Dalton K, Podadera A, Granda V, Nicieza I, del Llano D, González R, de los Toyos J, García Ocaña M, Vázquez F, Martín Alonso J, Prieto J, Parra F, Casais R. ELISA for detection of variant rabbit haemorrhagic disease virus RHDV2 antigen in liver extracts. J Virol Methods 2018; 251:38-42. [DOI: 10.1016/j.jviromet.2017.09.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 07/26/2017] [Accepted: 09/19/2017] [Indexed: 12/28/2022]
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8
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Li Q, Wang X, Wang C, Yu Y, Wang G, Gao J, Liu H, Xie H, Huang B, Li Z, Kong N, Zhang G, Hsu WH, Zhou EM. Intracellular expression of an anti-idiotypic antibody single-chain variable fragment reduces porcine reproductive and respiratory syndrome virus infection in MARC-145 cells. Antivir Ther 2015. [PMID: 26214224 DOI: 10.3851/imp2980] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Porcine reproductive and respiratory syndrome virus (PRRSV) is the causative agent of porcine reproductive and respiratory syndrome; it is one of the most economically important viral diseases affecting the swine industry worldwide. At present, neither live-attenuated nor inactivated PRRSV vaccines can provide sustainable disease control. Our previous studies have demonstrated that PRRSV infection can produce the auto-anti-idiotypic antibodies (aAb2s) specific to the idiotypic antibodies against PRRSV GP5, which plays an important role in the host immune responses to PRRSV infection. In the present study, a single-chain variable antibody fragment (scFv) from the monoclonal anti-idiotypic antibody specific for the idiotypic antibody against GP5 was expressed in MARC-145 cells and its effect on virus infection in vitro was evaluated. METHODS An scFv was constructed from the anti-idiotypic antibody (Mab2-5G2) and was named 5G2scFv. The lentiviral vector system was used as a vehicle to deliver 5G2scFv into MARC-145 cells. The effect of 5G2scFv expression in MARC-145 was analysed by determining the PRRSV N protein level and the virus titre in the supernatant. Virus attachment and the level of type I interferon (IFN) were determined to elucidate the mechanism of the scFv effect. RESULTS 5G2scFv was delivered in MARC-145 cells using the lentiviral vector system as confirmed by the western blot and indirect immunofluorescence assays. The PRRSV challenge experiments demonstrated that expressed 5G2scFv in MARC-145 strongly reduced PRRSV infection and replication by inhibiting protein synthesis and progeny virus production. This effect was not due to the change of viability or virus binding, but increased IFN-α at messenger RNA and protein levels. CONCLUSIONS The expression of the anti-idiotypic antibody 5G2scFv in MARC-145 cells has the interferential effect on PRRSV infection in the cells by induction of IFN-α, which provides a novel therapeutic approach for PRRSV infection.
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Affiliation(s)
- Qiongyi Li
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, China
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Yang M, Lu Y, Ma Y, Wu G, Beier RC, Hou X, Wu G. Inhibition of Porcine Reproductive and Respiratory Syndrome Virus in vitro By Forsythoside A. INT J PHARMACOL 2015. [DOI: 10.3923/ijp.2015.394.399] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Redondo E, Gázquez A, Vadillo S, García A, Franco A, Masot AJ. Induction of interleukin-8 and interleukin-12 in neonatal ovine lung following experimental inoculation of bovine respiratory syncytial virus. J Comp Pathol 2013; 150:434-48. [PMID: 24854063 DOI: 10.1016/j.jcpa.2013.08.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Revised: 07/05/2013] [Accepted: 08/18/2013] [Indexed: 10/26/2022]
Abstract
This study aimed to determine the immunohistochemical expression of interleukin (IL)-1β, tumour necrosis factor alpha (TNF)-α, interferon (IFN)-γ, IL-4, IL-6, IL-8, IL-10 and IL-12 and to measure the concentrations of these cytokines in lung tissue from lambs infected experimentally with bovine respiratory syncytial virus (BRSV). Lambs (n = 15) were inoculated at 2 days of age with 20 ml of viral inoculum (1.26 × 10(6) TCID50 per ml) or sterile medium (n = 15). Rectal temperature, pulse and respiratory rates were monitored daily in control and infected lambs. Lambs were killed and subject to necropsy examination at 1, 3, 5, 7 and 15 days post inoculation (dpi). There was a temporal association between pulmonary expression of these cytokines and lung pathology in BRSV-infected lambs. The cytokines IL-4 and IL-10 were not elevated, but there was a significant increase in IL-1β, TNF-α, IFN-γ and IL-6 proteins and labelled cells, suggesting that these cytokines may play a role in the biological response to BRSV infection and contribute to the development of lung lesions. There was also a significant increase in the cytokine concentration and number of immunolabelled cells expressing IL-8 and IL-12 in infected lungs, suggesting that these cytokines might be used as therapeutic targets in the management of BRSV, in conjunction with measures to combat the causative pathogen and prophylactic methods aimed at preventing infection.
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Affiliation(s)
- E Redondo
- Histology and Pathology Unit, Animal Medicine Department, Veterinary Faculty, University of Extremadura, Avenue of the University, 10003 Cáceres, Spain.
| | - A Gázquez
- Histology and Pathology Unit, Animal Medicine Department, Veterinary Faculty, University of Extremadura, Avenue of the University, 10003 Cáceres, Spain
| | - S Vadillo
- Microbiology Unit, Animal Health Department, Veterinary Faculty, University of Extremadura, Avenue of the University, 10003 Cáceres, Spain
| | - A García
- Histology and Pathology Unit, Animal Medicine Department, Veterinary Faculty, University of Extremadura, Avenue of the University, 10003 Cáceres, Spain
| | - A Franco
- Anatomy and Embryology Unit, Animal Medicine Department, Veterinary Faculty, University of Extremadura, Avenue of the University, 10003 Cáceres, Spain
| | - A J Masot
- Histology and Pathology Unit, Animal Medicine Department, Veterinary Faculty, University of Extremadura, Avenue of the University, 10003 Cáceres, Spain
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Urban-Chmiel R, Wernicki A, Grooms DL, Barbu NI, Rola J, Socha W. Rapid Detection of Bovine Respiratory Syncytial Virus in Poland Using a Human Patient-Side Diagnostic Assay. Transbound Emerg Dis 2013; 62:407-10. [PMID: 23931548 DOI: 10.1111/tbed.12134] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Indexed: 11/29/2022]
Abstract
Bovine respiratory syncytial virus (BRSV) plays a significant role in the etiopathogenesis of the respiratory syndrome in young cattle during their first year of life. Development of rapid and accurate BRSV diagnostic tools would aid in the appropriate control of this important pathogen. The objective of this study was to characterize infections induced by BRSV by means of rapid patient-side immunomigration assays used for diagnosis of human respiratory syncytial virus (hRSV) in humans. Nasal and tracheal swabs were obtained from healthy calves of various beef and dairy breeds - Holstein-Friesian, Simmental, Charolais, Belgian Blue and Limousin, between the ages of 5 and 12 months, from 26 farms. BRSV was identified using two rapid immunomigration assays, TruRSV® and Clearview® RSV, and compared with RT-PCR as a reference technique. BRSV was found in 73.1% of all the herds tested. High agreement with RT-PCR was obtained for TruRSV® (κ = 0.824), while in the case of the Clearview® RSV test, agreement with PCR was moderate (κ = 0.420). The results demonstrate that rapid patient-side immunomigration assays designed to detect hRSV can be used to accurately detect BRSV in field samples collected from cattle.
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Affiliation(s)
- R Urban-Chmiel
- Sub-department of Veterinary Prevention, Institute of Biological Bases of Animal Diseases, Faculty of Veterinary Medicine, University of Life Sciences, Lublin, Poland
| | - A Wernicki
- Sub-department of Veterinary Prevention, Institute of Biological Bases of Animal Diseases, Faculty of Veterinary Medicine, University of Life Sciences, Lublin, Poland
| | - D L Grooms
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI, USA
| | - N I Barbu
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI, USA
| | - J Rola
- Department of Virology, National Veterinary Research Institute, Pulawy, Poland
| | - W Socha
- Department of Virology, National Veterinary Research Institute, Pulawy, Poland
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12
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Gao L, Zhang W, Sun Y, Yang Q, Ren J, Liu J, Wang H, Feng WH. Cryptoporus volvatus extract inhibits porcine reproductive and respiratory syndrome virus (PRRSV) in vitro and in vivo. PLoS One 2013; 8:e63767. [PMID: 23704937 PMCID: PMC3660591 DOI: 10.1371/journal.pone.0063767] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Accepted: 04/02/2013] [Indexed: 01/08/2023] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) is an important arterivirus that can cause significant losses in swine industry. At present, there are no adequate control strategies against PRRSV. Thus, there is an urgent need for new treatment regimens that have efficacious antiviral activity to compensate for vaccines. Cryptoporus volvatus commonly serves as an anti-infective agent in Tradational Chinese Medicines. In this report, we exploited whether the aqueous extract from the fruiting body of Cryptoporus volvatus had the potential to inhibit PRRSV infection. Our results showed that the extract significantly inhibited PRRSV infection by repressing virus entry, viral RNA expression, and possibly viral protein synthesis, cell-to-cell spread, and releasing of virus particles. However, it did not block PRRSV binding to cells. Further studies confirmed that the extract directly inhibited PRRSV RNA-dependent RNA polymerase (RdRp) activity, thus interfering with PRRSV RNA and protein synthesis. More importantly, the extract efficiently inhibited highly pathologic PRRSV (HP-PRRSV) infection in vivo, reduced virus load in serum, and increased the survival rate of pigs inoculated with HP-PRRSV strain. Collectively, our findings imply that the aqueous extract from the fruiting body of Cryptoporus volvatus has the potential to be used for anti-PRRSV therapies.
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Affiliation(s)
- Li Gao
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, China Agricultural University, Beijing, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Weiwei Zhang
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, China Agricultural University, Beijing, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Yipeng Sun
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Qian Yang
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, China Agricultural University, Beijing, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Jie Ren
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, China Agricultural University, Beijing, China
| | - Jinhua Liu
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Hexiang Wang
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, China Agricultural University, Beijing, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
- * E-mail: (WHF); (HW)
| | - Wen-hai Feng
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, China Agricultural University, Beijing, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
- * E-mail: (WHF); (HW)
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Schaefer AL, Cook NJ, Bench C, Chabot JB, Colyn J, Liu T, Okine EK, Stewart M, Webster JR. The non-invasive and automated detection of bovine respiratory disease onset in receiver calves using infrared thermography. Res Vet Sci 2011; 93:928-35. [PMID: 22055252 PMCID: PMC7111736 DOI: 10.1016/j.rvsc.2011.09.021] [Citation(s) in RCA: 124] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Revised: 06/27/2011] [Accepted: 09/30/2011] [Indexed: 10/30/2022]
Abstract
Bovine respiratory disease complex (BRD) causes considerable economic loss and biosecurity cost to the beef industry globally and also results in significant degradation to the welfare of affected animals. The successful treatment of this disease depends on the early, timely and cost effective identification of affected animals. The objective of the present study was to investigate the use of an automated, RFID driven, noninvasive infrared thermography technology to determine BRD in cattle. Sixty-five calves averaging 220 kg were exposed to standard industry practices of transport and auction. The animals were monitored for BRD using conventional biometric signs for clinical scores, core temperatures, haematology, serum cortisol and infrared thermal values over 3 weeks. The data collected demonstrated that true positive animals for BRD based on a gold standard including core temperature, clinical score, white blood cell number and neutrophil/lymphocyte ratio displayed higher peak infrared thermal values of 35.7±0.35 °C compared to true negative animals 34.9±0.22 °C (P<0.01). The study also demonstrated that such biometric data can be non-invasively and automatically collected based on a system developed around the animal's water station. It is concluded that the deployment of such systems in the cattle industry would aid animal managers and practitioners in the identification and management of BRD in cattle populations.
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Affiliation(s)
- A L Schaefer
- Agriculture and Agri-Food Canada, Lacombe Research Centre, 6000 C and E Trail, Lacombe, Alberta, Canada T4L 1W1.
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Bashir S, Singh R, Sharma B, Yadav SK. Development of a sandwich ELISA for the detection of bovine herpesvirus type 1. ASIAN PAC J TROP MED 2011; 4:363-6. [PMID: 21771677 DOI: 10.1016/s1995-7645(11)60104-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Revised: 12/27/2010] [Accepted: 02/15/2011] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To develop a standard enzyme-linked immunosorbent assay (ELISA) for the detection of bovine herpesvirus type 1 (BHV-1). METHODS The assay was based on hyperimmune rabbit and guinea pig antisera raised against purified BHV-1. Polyethylene glycol precipitation and sucrose density gradient methods were adopted for viral concentration and purification. Antisera were raised using Freund's adjuvant followed by extraction of IgG of high purity. RESULTS Optimum antisera dilutions as determined by titrations were chosen as 1:4 000, whereas the conjugate was used at 1:2 000 dilution. Using 95 clinical specimens, the ELISA test showed a sensitivity and specificity of 91.90 % and 93.10 %, respectively when compared to PCR. The cut-off value was fixed at 0.15 (A(490)) and a P/N ratio of >1.30 indicated a significant positive reaction. CONCLUSIONS The results have demonstrated that this ELISA could efficiently detect BHV-1 and can be used as an important diagnostic tool.
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Affiliation(s)
- Shanaz Bashir
- Department of Epidemiology and Vety. Preventive medicine, College of Veterinary Sciences, Veterinary University, Mathura (UP), India
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15
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Abstract
Bovine respiratory syncytial virus (BRSV) is a major cause of respiratory disease and a major contributor to the bovine respiratory disease (BRD) complex. BRSV infects the upper and lower respiratory tract and is shed in nasal secretions. The close relatedness of BRSV to human respiratory syncytial virus (HRSV) has allowed researchers to use BRSV and HRSV to elucidate the mechanisms by which these viruses induce disease. Attempted vaccine production using formalin-inactivated vaccine resulted in exacerbated disease when infants became exposed to HRSV. Cattle vaccinated with formalin-inactivated virus had enhanced disease when inoculated with BRSV. This article discusses various aspects of BRSV, its epidemiology, pathogenesis, diagnostic tests, immunity, and vaccination.
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Intisar KS, Ali YH, Khalafalla AI, Rahman MEA, Amin AS. Respiratory syncytial virus infection of camels (Camelus dromedaries). Acta Trop 2010; 113:129-33. [PMID: 19840769 DOI: 10.1016/j.actatropica.2009.10.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Revised: 09/23/2009] [Accepted: 10/03/2009] [Indexed: 02/08/2023]
Abstract
This study aimed to investigate the occurrence of respiratory syncytial virus (RSV) infections in camels in Sudan. A total of 272 camel lung specimens showing pneumonia were collected from slaughter houses at four different areas in Sudan, additionally 8 specimens were collected from outbreaks of respiratory infection in camels. Using sandwich ELISA kits for RSV antigen detection 4 out of 280 tested lungs (1.4%) were positive, all were from Central Sudan (Tambool slaughter house). FAT was used to confirm the ELISA positives. Polymerase chain reaction RT/PCR was applied for the detection of RSV genome in camel lungs; 1 out of 4 ELISA positives was positive by RT/PCR. Using indirect ELISA kits 135 out of 495 (27.3%) camel sera showed antibodies to RSV, highest prevalence was observed in Western (33.5%) then Central (31.6%) and Eastern Sudan (23.5%). Based on the manufacturer specified calculations for OD readings, most of positive sera (90/135) were low reactive (1+). This is the first report for the detection of RSV antigen, genome and antibody in camels in Sudan.
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Affiliation(s)
- K S Intisar
- Central Veterinary Research Laboratory, P.O. Box 8067, Al Amarat, Khartoum, Sudan.
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