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Luo H, Liang Z, Lin J, Wang Y, Liu Y, Mei K, Zhao M, Huang S. Research progress of porcine epidemic diarrhea virus S protein. Front Microbiol 2024; 15:1396894. [PMID: 38873162 PMCID: PMC11169810 DOI: 10.3389/fmicb.2024.1396894] [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: 03/06/2024] [Accepted: 05/13/2024] [Indexed: 06/15/2024] Open
Abstract
Porcine epidemic diarrhea virus (PEDV) is a single-stranded RNA virus with a capsid membrane that causes acute infectious gastrointestinal disease characterized by vomiting, diarrhea, and dehydration in swine. Piglets are more susceptible to PEDV than adults, with an infection rate reaching 90% and a fatality rate as high as 100%. Moreover, PEDV has a rapid transmission rate and broad transmission range. Consequently, PEDV has caused considerable economic losses and negatively impacted the sustainability of the pig industry. The surface spike (S) glycoprotein is the largest structural protein in PEDV virions and is closely associated with host cell fusion and virus invasion. As such, the S protein is an important target for vaccine development. In this article, we review the genetic variation, immunity, apoptosis-induction function, virulence, vaccine potential, and other aspects of the PEDV S protein. This review provides a theoretical foundation for preventing and controlling PEDV infection and serves as a valuable resource for further research and development of PEDV vaccines.
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Affiliation(s)
- Haojian Luo
- School of Life Science and Engineering, Foshan University, Foshan, China
| | - Zhaoping Liang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Junjie Lin
- School of Life Science and Engineering, Foshan University, Foshan, China
| | - Yiqiao Wang
- School of Life Science and Engineering, Foshan University, Foshan, China
| | - Yingying Liu
- School of Life Science and Engineering, Foshan University, Foshan, China
| | - Kun Mei
- School of Life Science and Engineering, Foshan University, Foshan, China
| | - Mengmeng Zhao
- School of Life Science and Engineering, Foshan University, Foshan, China
| | - Shujian Huang
- School of Life Science and Engineering, Foshan University, Foshan, China
- Guangdong Hua Sheng Biotechnology Co., Ltd, Guangzhou, China
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Zhang Y, Chen Y, Zhou J, Wang X, Ma L, Li J, Yang L, Yuan H, Pang D, Ouyang H. Porcine Epidemic Diarrhea Virus: An Updated Overview of Virus Epidemiology, Virulence Variation Patterns and Virus-Host Interactions. Viruses 2022; 14:v14112434. [PMID: 36366532 PMCID: PMC9695474 DOI: 10.3390/v14112434] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 10/31/2022] [Accepted: 11/01/2022] [Indexed: 11/06/2022] Open
Abstract
The porcine epidemic diarrhea virus (PEDV) is a member of the coronavirus family, causing deadly watery diarrhea in newborn piglets. The global pandemic of PEDV, with significant morbidity and mortality, poses a huge threat to the swine industry. The currently developed vaccines and drugs are only effective against the classic GI strains that were prevalent before 2010, while there is no effective control against the GII variant strains that are currently a global pandemic. In this review, we summarize the latest progress in the biology of PEDV, including its transmission and origin, structure and function, evolution, and virus-host interaction, in an attempt to find the potential virulence factors influencing PEDV pathogenesis. We conclude with the mechanism by which PEDV components antagonize the immune responses of the virus, and the role of host factors in virus infection. Essentially, this review serves as a valuable reference for the development of attenuated virus vaccines and the potential of host factors as antiviral targets for the prevention and control of PEDV infection.
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Affiliation(s)
- Yuanzhu Zhang
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Yiwu Chen
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Jian Zhou
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Xi Wang
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Lerong Ma
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Jianing Li
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Lin Yang
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Hongming Yuan
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Animal Sciences, Jilin University, Changchun 130062, China
- Chongqing Research Institute, Jilin University, Chongqing 401120, China
| | - Daxin Pang
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Animal Sciences, Jilin University, Changchun 130062, China
- Chongqing Research Institute, Jilin University, Chongqing 401120, China
- Chongqing Jitang Biotechnology Research Institute Co., Ltd., Chongqing 401120, China
- Correspondence: (D.P.); (H.O.); Tel.: +86-431-8783-6175 (H.O.)
| | - Hongsheng Ouyang
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Animal Sciences, Jilin University, Changchun 130062, China
- Chongqing Research Institute, Jilin University, Chongqing 401120, China
- Chongqing Jitang Biotechnology Research Institute Co., Ltd., Chongqing 401120, China
- Correspondence: (D.P.); (H.O.); Tel.: +86-431-8783-6175 (H.O.)
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Luo Q, Zhang C, Chen Y, Chen H, Yang Y. Alpiniae oxyphyllae fructus polysaccharide 3 inhibits porcine epidemic diarrhea virus entry into IPEC-J2 cells. Res Vet Sci 2022; 152:434-441. [PMID: 36126510 DOI: 10.1016/j.rvsc.2022.09.011] [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: 05/05/2022] [Revised: 09/08/2022] [Accepted: 09/09/2022] [Indexed: 11/30/2022]
Abstract
Porcine epidemic diarrhea virus (PEDV) is deadly for suckling piglets and is a significant threat to most pig farms. Alpiniae oxyphyllae fructus polysaccharide 3 (AOFP3) shows antiviral activity against PEDV. However, the anti-PEDV mechanism of AOFP3 is unknown. Entering the host cell is important for viral infection, and many drugs play antiviral roles by inhibiting this process. To understand the antiviral mechanism of AOFP3 against PEDV, the effect of AOFP3 on PEDV entering IPEC-J2 cells was investigated in the present study. Real-time PCR and immunofluorescence were used to study the effect of AOFP3 on PEDV binding and penetrating IPEC-J2 cells. The effect of PEDV on AOFP3 attachment to IPEC-J2 cells was also investigated. Afterward, the effect of AOFP3 on PEDV spike (S) protein binding to porcine aminopeptidase was tested by using coimmunoprecipitation, and the effect of AOFP3 on the cholesterol level of IPEC-J2 cells was detected. The results showed that AOFP3 competitively inhibited PEDV adsorption on IPEC-J2 cells by blocking PEDV S protein binding to porcine aminopeptidase in IPEC-J2 cells. Furthermore, AOFP3 decreased PEDV penetration into host cells by decreasing the cholesterol level in IPEC-J2 cells.
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Affiliation(s)
- Qiyuan Luo
- Institute of Traditional South Chinese Veterinary Pharmacology, College of Animal Science and Technology, Hainan University, Haikou 570228, PR China
| | - Chenglong Zhang
- Institute of Traditional South Chinese Veterinary Pharmacology, College of Animal Science and Technology, Hainan University, Haikou 570228, PR China
| | - Yun Chen
- Institute of Traditional South Chinese Veterinary Pharmacology, College of Animal Science and Technology, Hainan University, Haikou 570228, PR China.
| | - Huricha Chen
- Institute of Traditional South Chinese Veterinary Pharmacology, College of Animal Science and Technology, Hainan University, Haikou 570228, PR China
| | - Yuhui Yang
- Institute of Traditional South Chinese Veterinary Pharmacology, College of Animal Science and Technology, Hainan University, Haikou 570228, PR China
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Lin F, Zhang H, Li L, Yang Y, Zou X, Chen J, Tang X. PEDV: Insights and Advances into Types, Function, Structure, and Receptor Recognition. Viruses 2022; 14:v14081744. [PMID: 36016366 PMCID: PMC9416423 DOI: 10.3390/v14081744] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 08/06/2022] [Accepted: 08/06/2022] [Indexed: 11/16/2022] Open
Abstract
Porcine epidemic diarrhea virus (PEDV) has been endemic in most parts of the world since its emergence in the 1970s. It infects the small intestine and intestinal villous cells, spreads rapidly, and causes infectious intestinal disease characterized by vomiting, diarrhea, and dehydration, leading to high mortality in newborn piglets and causing massive economic losses to the pig industry. The entry of PEDV into cells is mediated by the binding of its spike protein (S protein) to a host cell receptor. Here, we review the structure of PEDV, its strains, and the structure and function of the S protein shared by coronaviruses, and summarize the progress of research on possible host cell receptors since the discovery of PEDV.
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Affiliation(s)
- Feng Lin
- College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Huanyu Zhang
- College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Linquan Li
- College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Yang Yang
- College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Xiaodong Zou
- College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Jiahuan Chen
- College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Xiaochun Tang
- College of Animal Sciences, Jilin University, Changchun 130062, China
- Chongqing Research Institute, Jilin University, Chongqing 401120, China
- Correspondence:
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Whitworth KM, Green JA, Redel BK, Geisert RD, Lee K, Telugu BP, Wells KD, Prather RS. Improvements in pig agriculture through gene editing. CABI AGRICULTURE AND BIOSCIENCE 2022; 3:41. [PMID: 35755158 PMCID: PMC9209828 DOI: 10.1186/s43170-022-00111-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 06/12/2022] [Indexed: 05/06/2023]
Abstract
Genetic modification of animals via selective breeding is the basis for modern agriculture. The current breeding paradigm however has limitations, chief among them is the requirement for the beneficial trait to exist within the population. Desirable alleles in geographically isolated breeds, or breeds selected for a different conformation and commercial application, and more importantly animals from different genera or species cannot be introgressed into the population via selective breeding. Additionally, linkage disequilibrium results in low heritability and necessitates breeding over successive generations to fix a beneficial trait within a population. Given the need to sustainably improve animal production to feed an anticipated 9 billion global population by 2030 against a backdrop of infectious diseases and a looming threat from climate change, there is a pressing need for responsive, precise, and agile breeding strategies. The availability of genome editing tools that allow for the introduction of precise genetic modification at a single nucleotide resolution, while also facilitating large transgene integration in the target population, offers a solution. Concordant with the developments in genomic sequencing approaches, progress among germline editing efforts is expected to reach feverish pace. The current manuscript reviews past and current developments in germline engineering in pigs, and the many advantages they confer for advancing animal agriculture.
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Affiliation(s)
- Kristin M. Whitworth
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Jonathan A. Green
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Bethany K. Redel
- United States Department of Agriculture – Agriculture Research Service, Plant Genetics Research Unit, Columbia, MO 65211 USA
| | - Rodney D. Geisert
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Kiho Lee
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Bhanu P. Telugu
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Kevin D. Wells
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Randall S. Prather
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
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Regulatory effect and mechanism of APN gene on porcine epidemic diarrhea virus resistance. Gene 2021; 775:145448. [PMID: 33482281 DOI: 10.1016/j.gene.2021.145448] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 11/19/2020] [Accepted: 01/13/2021] [Indexed: 11/21/2022]
Abstract
PURPOSE The expression level of aminopeptidase N (APN) is evidently correlated with porcine epidemic diarrhea virus (PEDV) infectivity. This study aims to examine the mechanisms regulating APN expression level in response to PEDV infection. METHODS Quantitative real time PCR was performed herein to detect gene expression dynamics at various timepoints after PEDV infection. Subsequently, CRISPR/Cas9 gene editing technology was used to generate a APN-knockout IPEC-J2 cell line, exploring the effects of APN on cell proliferation by propidium iodide staining and anti-PEDV activity by indirect immunofluorescence assay. Ultimately, the effects of single nucleotide polymorphisms (SNPs) and methylation in the APN promoter region on gene expression were analyzed by using bisulfite sequencing PCR and dual luciferase reporter gene assay. RESULTS APN expression was significantly upregulated within 4-24 h post-infection. The cytoactivity of the APN-knockout IPEC-J2 cell line was markedly suppressed at different timepoints. Further, cell cycle analyses indicated an increase in the number of G1-phase cells and a significant decrease in that of S-phase cells. Moreover, key cyclical factors regulating the G1 phase were highly expressed in APN-knockout cells. The RNA copies of viral particles and mRNA levels of antiviral genes and inflammatory cytokines in APN-knockout cells were markedly decreased within 24 h of PEDV infection. Similarly, indirect immunofluorescence assay confirmed that the number of PEDV particles was significantly decreased. Sequence analysis revealed two CpG islands in the APN promoter region. However, there was no evident correlation between the methylation status of APN promoter and mRNA levels. Dual luciferase reporter gene assay showed that the SNP rs326030589 (G/A) significantly increased the promoter activity of APN. CONCLUSIONS These results suggested that APN knockout enhanced the resistance of IPEC-J2 cells to PEDV. Moreover, rs326030589 in the APN promoter region participated in gene transcription regulation. Our results provide a reference for studying the mechanisms regulating APN and may contribute to the application of APN gene in resistance breeding of swine epidemic diarrhea.
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Evaluation of the Efficacy of a Recombinant Adenovirus Expressing the Spike Protein of Porcine Epidemic Diarrhea Virus in Pigs. BIOMED RESEARCH INTERNATIONAL 2019; 2019:8530273. [PMID: 31687402 PMCID: PMC6800969 DOI: 10.1155/2019/8530273] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 09/17/2019] [Accepted: 09/21/2019] [Indexed: 12/13/2022]
Abstract
In recent years, many studies have shown that recombinant adenovirus live vector-based vaccines are a promising novel vaccine candidate against virus infection. Therefore, in this study, a new type of recombinant adenovirus expressing the spike (S) protein of porcine epidemic diarrhea virus (PEDV), rAd-PEDV-S, was generated, and its characteristics were determined. Then, its efficacy as a vaccine candidate was evaluated in 4-week-old pigs. The results showed that the S protein could be well expressed at a high level in rAd-PEDV-S-infected cells and that the viral titers could reach 1011 PFU/mL. Further animal experimental results showed that rAd-PEDV-S elicited a significant PEDV-specific humoral immune response after vaccination (P < 0.05). In addition, rAd-PEDV-S provided partial protection for pigs against the highly virulent PEDV challenge. The results presented in this study indicate that the adenovirus vector can be used as a vaccine delivery vector for the development of a PEDV vaccine and is a promising novel vaccine candidate for future prevention and control of porcine epidemic diarrhea (PED), but its efficacy still needs to be improved in the future.
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Li C, Su M, Yin B, Guo D, Wei S, Kong F, Feng L, Wu R, Sun D. Integrin αvβ3 enhances replication of porcine epidemic diarrhea virus on Vero E6 and porcine intestinal epithelial cells. Vet Microbiol 2019; 237:108400. [PMID: 31585640 DOI: 10.1016/j.vetmic.2019.108400] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 08/22/2019] [Accepted: 08/24/2019] [Indexed: 01/12/2023]
Abstract
The entry mechanism of porcine epidemic diarrhea virus (PEDV) remains unclear, especially the virus receptor. Our previous study revealed a potential correlation between integrin αvβ3 and PEDV infection. In the current study, the effect of overexpression, silencing, antibody inhibition, and co-expression with porcine aminopeptidase N (pAPN) of integrin αvβ3 on PEDV infection was investigated and analyzed in African green monkey Vero E6 cells and porcine intestinal epithelial cells (IECs) using the classical strain CV777 and variant strain HM2017 of PEDV. Integrin αvβ3 significantly enhanced the replication of the classical and variant strains of PEDV in Vero E6 cells and IECs. The integrin αv and β3 subunits were both involved in the enhancement of PEDV infection, the Arg-Gly-Asp peptides targeting integrin αvβ3 significantly inhibited replication of PEDV in Vero E6 cells, and co-expression of integrin αvβ3 with pAPN significantly enhanced replication of PEDV in Vero E6 and BHK-21 cells. These results demonstrate that integrin αvβ3 enhances PEDV replication in Vero E6 cells and IECs. These data provide novel insights into the entry mechanism of PEDV.
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Affiliation(s)
- Chunqiu Li
- Laboratory for the Prevention and Control of Swine Infectious Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, No. 5 Xinfeng Road, Sartu District, Daqing 163319, PR China
| | - Mingjun Su
- Laboratory for the Prevention and Control of Swine Infectious Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, No. 5 Xinfeng Road, Sartu District, Daqing 163319, PR China
| | - Baishuang Yin
- College of Animal Science and Technology, Jilin Agricultural Science and Technology University, Jilin, 132101, PR China
| | - Donghua Guo
- Laboratory for the Prevention and Control of Swine Infectious Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, No. 5 Xinfeng Road, Sartu District, Daqing 163319, PR China
| | - Shan Wei
- Laboratory for the Prevention and Control of Swine Infectious Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, No. 5 Xinfeng Road, Sartu District, Daqing 163319, PR China
| | - Fanzhi Kong
- Laboratory for the Prevention and Control of Swine Infectious Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, No. 5 Xinfeng Road, Sartu District, Daqing 163319, PR China
| | - Li Feng
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, 150069, PR China
| | - Rui Wu
- Laboratory for the Prevention and Control of Swine Infectious Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, No. 5 Xinfeng Road, Sartu District, Daqing 163319, PR China
| | - Dongbo Sun
- Laboratory for the Prevention and Control of Swine Infectious Diseases, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, No. 5 Xinfeng Road, Sartu District, Daqing 163319, PR China.
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Tu CF, Chuang CK, Hsiao KH, Chen CH, Chen CM, Peng SH, Su YH, Chiou MT, Yen CH, Hung SW, Yang TS, Chen CM. Lessening of porcine epidemic diarrhoea virus susceptibility in piglets after editing of the CMP-N-glycolylneuraminic acid hydroxylase gene with CRISPR/Cas9 to nullify N-glycolylneuraminic acid expression. PLoS One 2019; 14:e0217236. [PMID: 31141512 PMCID: PMC6541307 DOI: 10.1371/journal.pone.0217236] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 05/07/2019] [Indexed: 01/03/2023] Open
Abstract
The porcine epidemic diarrhoea virus (PEDV) devastates the health of piglets but may not infect piglets whose CMP-N-glycolylneuraminic acid hydroxylase (CMAH) gene is mutated (knockouts, KO) by using CRISPR/Cas9 gene editing techniques. This hypothesis was tested by using KO piglets that were challenged with PEDV. Two single-guide RNAs targeting the CMAH gene and Cas9 mRNA were microinjected into the cytoplasm of newly fertilized eggs. Four live founders generated and proven to be biallelic KO, lacking detectable N-glycolylneuraminic acid (NGNA). The founders were bred, and homozygous offspring were obtained. Two-day-old (in exps. I, n = 6, and III, n = 15) and 3-day-old (in exp. II, n = 9) KO and wild-type (WT, same ages in respective exps.) piglets were inoculated with TCID50 1x103 PEDV and then fed 20 mL of infant formula (in exps. I and II) or sow's colostrum (in exp. III) every 4 hours. In exp. III, the colostrum was offered 6 times and was then replaced with Ringer/5% glucose solution. At 72 hours post-PEDV inoculation (hpi), the animals either deceased or euthanized were necropsied and intestines were sampled. In all 3 experiments, the piglets showed apparent outward clinical manifestations suggesting that infection occurred despite the CMAH KO. In exp. I, all 6 WT piglets and only 1 of 6 KO piglets died at 72 hpi. Histopathology and immunofluorescence staining showed that the villus epithelial cells of WT piglets were severely exfoliated, but only moderate exfoliation and enterocyte vacuolization was observed in KO piglets. In exp. II, delayed clinical symptoms appeared, yet the immunofluorescence staining/histopathologic inspection (I/H) scores of the two groups differed little. In exp. III, the animals exhibited clinical and pathological signs after inoculation similar to those in exp. II. These results suggest that porcine CMAH KO with nullified NGNA expression are not immune to PEDV but that this KO may lessen the severity of the infection and delay its occurrence.
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Affiliation(s)
- Ching-Fu Tu
- Division of Animal Technology, Animal Technology Laboratories, Agricultural Technology Research Institute, Xiangshan Dist., Hsinchu, Taiwan, R.O.C
| | - Chin-kai Chuang
- Division of Animal Technology, Animal Technology Laboratories, Agricultural Technology Research Institute, Xiangshan Dist., Hsinchu, Taiwan, R.O.C
| | - Kai-Hsuan Hsiao
- Division of Animal Technology, Animal Technology Laboratories, Agricultural Technology Research Institute, Xiangshan Dist., Hsinchu, Taiwan, R.O.C
- Department of Life Sciences, National Chung Hsing University, South Dist., Taichung, Taiwan, R.O.C
| | - Chien-Hong Chen
- Division of Animal Technology, Animal Technology Laboratories, Agricultural Technology Research Institute, Xiangshan Dist., Hsinchu, Taiwan, R.O.C
| | - Chi-Min Chen
- Division of Animal Medicine, Animal Technology Laboratories, Agricultural Technology Research Institute, Xiangshan Dist., Hsinchu, Taiwan, R.O.C
| | - Su-Hei Peng
- Division of Animal Technology, Animal Technology Laboratories, Agricultural Technology Research Institute, Xiangshan Dist., Hsinchu, Taiwan, R.O.C
| | - Yu-Hsiu Su
- Division of Animal Technology, Animal Technology Laboratories, Agricultural Technology Research Institute, Xiangshan Dist., Hsinchu, Taiwan, R.O.C
| | - Ming-Tang Chiou
- Department of Veterinary Medicine, College of Veterinary Medicine, National of Science and Technology, Pingtung, Taiwan, ROC
| | - Chon-Ho Yen
- Division of Animal Technology, Animal Technology Laboratories, Agricultural Technology Research Institute, Xiangshan Dist., Hsinchu, Taiwan, R.O.C
| | - Shao-Wen Hung
- Division of Animal Industry, Animal Technology Laboratories, Agricultural Technology Research Institute, Xiangshan Dist., Hsinchu, Taiwan, R.O.C
| | - Tien-Shuh Yang
- Division of Animal Technology, Animal Technology Laboratories, Agricultural Technology Research Institute, Xiangshan Dist., Hsinchu, Taiwan, R.O.C
- Department of Biotechnology and Animal Science, National Ilan University, Yilan, Yilan, Taiwan, R.O.C
| | - Chuan-Mu Chen
- Department of Life Sciences, National Chung Hsing University, South Dist., Taichung, Taiwan, R.O.C
- The iEGG and Animal Biotechnology Center, National Chung Hsinh University, Taichung, Taiwan, R.O.C
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Whitworth KM, Rowland RRR, Petrovan V, Sheahan M, Cino-Ozuna AG, Fang Y, Hesse R, Mileham A, Samuel MS, Wells KD, Prather RS. Resistance to coronavirus infection in amino peptidase N-deficient pigs. Transgenic Res 2018; 28:21-32. [PMID: 30315482 PMCID: PMC6353812 DOI: 10.1007/s11248-018-0100-3] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 10/05/2018] [Indexed: 12/30/2022]
Abstract
The alphacoronaviruses, transmissible gastroenteritis virus (TGEV) and Porcine epidemic diarrhea virus (PEDV) are sources of high morbidity and mortality in neonatal pigs, a consequence of dehydration caused by the infection and necrosis of enterocytes. The biological relevance of amino peptidase N (ANPEP) as a putative receptor for TGEV and PEDV in pigs was evaluated by using CRISPR/Cas9 to edit exon 2 of ANPEP resulting in a premature stop codon. Knockout pigs possessing the null ANPEP phenotype and age matched wild type pigs were challenged with either PEDV or TGEV. Fecal swabs were collected daily from each animal beginning 1 day prior to challenge with PEDV until the termination of the study. The presence of virus nucleic acid was determined by PCR. ANPEP null pigs did not support infection with TGEV, but retained susceptibility to infection with PEDV. Immunohistochemistry confirmed the presence of PEDV reactivity and absence of TGEV reactivity in the enterocytes lining the ileum in ANPEP null pigs. The different receptor requirements for TGEV and PEDV have important implications in the development of new genetic tools for the control of enteric disease in pigs.
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Affiliation(s)
- Kristin M Whitworth
- Division of Animal Science, University of Missouri, Randall Prather, 920 East Campus Drive, Columbia, MO, 65211, USA
| | - Raymond R R Rowland
- Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, KS, 66506, USA
| | - Vlad Petrovan
- Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, KS, 66506, USA
| | - Maureen Sheahan
- Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, KS, 66506, USA
| | - Ada G Cino-Ozuna
- Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, KS, 66506, USA
| | - Ying Fang
- Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, KS, 66506, USA
| | - Richard Hesse
- Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, KS, 66506, USA
| | | | - Melissa S Samuel
- Division of Animal Science, University of Missouri, Randall Prather, 920 East Campus Drive, Columbia, MO, 65211, USA
| | - Kevin D Wells
- Division of Animal Science, University of Missouri, Randall Prather, 920 East Campus Drive, Columbia, MO, 65211, USA
| | - Randall S Prather
- Division of Animal Science, University of Missouri, Randall Prather, 920 East Campus Drive, Columbia, MO, 65211, USA.
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Wanitchang A, Saenboonrueng J, Srisutthisamphan K, Jongkaewwattana A. Characterization of influenza A virus pseudotyped with the spike protein of porcine epidemic diarrhea virus. Arch Virol 2018; 163:3255-3264. [PMID: 30136251 PMCID: PMC7087185 DOI: 10.1007/s00705-018-4001-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 08/02/2018] [Indexed: 12/26/2022]
Abstract
The coronavirus spike protein and the influenza virus hemagglutinin are class I viral membrane fusion proteins. While the two proteins display strong structural conservation and the mechanisms underlying membrane fusion are similar, they share no sequence similarity. Whether they are functionally interchangeable is currently unknown. In this study, we constructed scIAV-S, a single-cycle influenza A virus pseudotyped with the spike protein of porcine epidemic diarrhea virus (PEDV), and demonstrated that this virus could infect cultured cells and trigger massive syncytium formation. Treatment with endocytosis inhibitors did not affect syncytium formation by infected cells. Moreover, the infectivity of scIAV-S was associated with the degree of cell adaptation of PEDV-S. Intriguingly, scIAV-S lacking functional neuraminidase (NA) exhibited substantially higher infectivity, suggesting a pivotal role of the sialic acid in the binding/entry of PEDV. Together, scIAV-S offers a robust platform for the investigation of the entry mechanism of PEDV or, possibly, of other coronaviruses.
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Affiliation(s)
- Asawin Wanitchang
- Virology and Cell Technology Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), Nation Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Rd., Klong 1, Klong Luang, Pathum Thani, 12120, Thailand
| | - Janya Saenboonrueng
- Virology and Cell Technology Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), Nation Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Rd., Klong 1, Klong Luang, Pathum Thani, 12120, Thailand
| | - Kanjana Srisutthisamphan
- Virology and Cell Technology Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), Nation Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Rd., Klong 1, Klong Luang, Pathum Thani, 12120, Thailand
| | - Anan Jongkaewwattana
- Virology and Cell Technology Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), Nation Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Rd., Klong 1, Klong Luang, Pathum Thani, 12120, Thailand.
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Li Y, Wang G, Wang J, Man K, Yang Q. Cell attenuated porcine epidemic diarrhea virus strain Zhejiang08 provides effective immune protection attributed to dendritic cell stimulation. Vaccine 2018; 35:7033-7041. [PMID: 29100707 PMCID: PMC7115645 DOI: 10.1016/j.vaccine.2017.10.052] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 08/04/2017] [Accepted: 10/16/2017] [Indexed: 12/16/2022]
Abstract
Cell attenuated porcine epidemic diarrhea virus strain Zhejiang08 provides effective immune protection in piglets. Zhejiang08 has higher ability to stimulate DCs and activates T-cell proliferation than classical vaccine strain CV777. Potential glycosylation site lacking in S protein may cause the stronger immune response.
Since 2010, the porcine epidemic diarrhea coronavirus (PEDV) has caused significant damage to the global pork industry. However, classical PEDV vaccine strains only provide limited protection against emerging strains. In this study, we successfully isolated and attenuated the PEDV epidemic strain Zhejiang08, which was characterized by good cell adaptation and high-titer production 48 h post infection in Vero E6 cells. The attenuated virus induced a high level of virus-specific neutralizing antibodies until 120 days after immunization in piglets and provided complete protection when challenged with an emerging virus strain on day 14 post immunization. Moreover, the capability to activate dendritic cells (DCs) of this isolate was identified. Higher expression levels of IL-12 and IFN-γ were recorded in DCs after treatment with Zhejiang08 for 24 h. Furthermore, genome sequencing and phylogenetic analysis revealed high homology between the main antigen epitopes of Zhejiang08 and PEDV pandemic isolates following 2011. Combining the glycosylation site prediction results and their distribution within the spatial structure of the S protein, led to the conclusion that the observed more effective host immune response of Zhejiang08 compared to CV777 was possibly associated with a lack of the potential glycosylation site in the 296 amino acids of the S protein. In summary, we illustrated that the attenuated virus represents a promising vaccine candidate.
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Affiliation(s)
- Yuchen Li
- Veterinary College, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu 210095, PR China
| | - Guihua Wang
- Veterinary Medicine Research Centre of Beijing Da Bei Nong Group, Beijing 100195, PR China
| | - Jialu Wang
- Veterinary College, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu 210095, PR China
| | - Kun Man
- Veterinary Medicine Research Centre of Beijing Da Bei Nong Group, Beijing 100195, PR China
| | - Qian Yang
- Veterinary College, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu 210095, PR China.
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Contribution of porcine aminopeptidase N to porcine deltacoronavirus infection. Emerg Microbes Infect 2018; 7:65. [PMID: 29636467 PMCID: PMC5893578 DOI: 10.1038/s41426-018-0068-3] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 03/18/2018] [Accepted: 03/21/2018] [Indexed: 12/13/2022]
Abstract
Porcine deltacoronavirus (PDCoV), a member of genus Deltacoronavirus, is an emerging swine enteropathogenic coronavirus (CoV). Although outstanding efforts have led to the identification of Alphacoronavirus and Betacoronavirus receptors, the receptor for Deltacoronavirus is unclear. Here, we compared the amino acid sequences of several representative CoVs. Phylogenetic analysis showed that PDCoV spike (S) protein was close to the cluster containing transmissible gastroenteritis virus (TGEV), which utilizes porcine aminopeptidase N (pAPN) as a functional receptor. Ectopic expression of pAPN in non-susceptible BHK-21 cells rendered them susceptible to PDCoV. These results indicate that pAPN may be a functional receptor for PDCoV infection. However, treatment with APN-specific antibody and inhibitors did not completely block PDCoV infection in IPI-2I porcine intestinal epithelial cells. pAPN knockout in IPI-2I cells completely blocked TGEV infection but only slightly decreased PDCoV infection. Homologous modeling of pAPN with the S1 C-terminal domain (S1-CTD) of PDCoV or TGEV showed that TGEV S1-CTD adopted β-turns (β1-β2 and β3-β4), forming the tip of a β-barrel, to recognize pAPN. However, only the top residues in the β1-β2 turn of PDCoV S1-CTD had the possibility to support an interaction with pAPN, and the β3-β4 turn failed to contact pAPN. We also discuss the evolution and variation of PDCoV S1-CTD based on structure information, providing clues to explain the usage of pAPN by PDCoV. Taken together, the results presented herein reveal that pAPN is likely not a critical functional receptor for PDCoV, although it is involved in PDCoV infection.
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