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Ding P, Jin Q, Chen X, Yang S, Guo J, Xing G, Deng R, Wang A, Zhang G. Nanovaccine Confers Dual Protection Against Influenza a Virus and Porcine Circovirus Type 2 [Retraction]. Int J Nanomedicine 2024; 19:3607-3608. [PMID: 38650838 PMCID: PMC11034555 DOI: 10.2147/ijn.s474056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Accepted: 04/16/2024] [Indexed: 04/25/2024] Open
Abstract
[This retracts the article DOI: 10.2147/IJN.S218057.].
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Guo Z, Xing G, Wang L, Jin Q, Lu Q, Zhang G. Potential Pathogenicity and Genetic Characteristics of a Live-Attenuated Classical Swine Fever Virus Vaccine Derivative Variant. Transbound Emerg Dis 2024; 2024:1-6. [DOI: 10.1155/2024/7244445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2024]
Abstract
Classical swine fever (CSF), caused by CSF virus (CSFV), is a highly contagious disease affecting pigs and causing massive pig production losses with severe global economic recession. The immunization of live-attenuated vaccines is still one of the key measures to CSFV management in endemic countries. However, there are also strong controversies about the usage of live-attenuated vaccines, particularly in pregnant sows and young pigs, such as in Europe, where domestic pigs are routinely not vaccinated until severe outbreaks occur. Here, we report a CSF outbreak in a pig farm in China, which affected more than 90% of the delivery sows and led to ∼45% birth loss. Surprisingly, phylogenetic analysis showed that the CSFV isolate (named CSFV/HeNLY2022, GenBank No. OR195698) was clustered into subgenotype 1.1a, closely together with the live-attenuated vaccine strains. Further genomic analysis also revealed that the isolate CSFV/HeNLY2022 shared the highest nucleotide identity of 99.7% with the C/HVRI vaccine strain (C-strain, GenBank No. AY805221). Moreover, compared to the C/HVRI strain, a total of eight amino acid mutations, distributed in Erns (H436thY and S476thR), E1 (T502thI and P581thT), E2 (M979thK and A1061thS), NS5A (A2980thT), and NS5B (I3818thM), were characterized in the CSFV/HeNLY2022 isolate. Our results suggested that the CSF outbreak was most likely caused by the live-attenuated CSFV vaccine or its derivative. It raises concern that the unscientific application of CSFV vaccines could potentially lead to CSFV spread in pigs. It is needed to perform a more rigorous evaluation of the safety of the C-strain-derived vaccines in combination with other different live-attenuated vaccines.
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Affiliation(s)
- Zhenhua Guo
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Institute for Animal Health, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Guangxu Xing
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Institute for Animal Health, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Leyi Wang
- Department of Veterinary Clinical Medicine and the Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Qianyue Jin
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Institute for Animal Health, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Qingxia Lu
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Institute for Animal Health, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Gaiping Zhang
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Institute for Animal Health, Henan Academy of Agricultural Sciences, Zhengzhou, China
- Longhu Modern Immunity Laboratory, Zhengzhou, Henan, China
- School of Advanced Agricultural Sciences, Peking University, Beijing, China
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Wei Q, Gao Y, Liu Y, Li Q, Jin Q, Chai S, Song Y, Xing G, Zhang G. Development of a unique sandwich enzyme-linked immunosorbent assay based on monoclonal antibodies for the specific detection of the egg drop syndrome virus. Avian Pathol 2024; 53:101-105. [PMID: 38018364 DOI: 10.1080/03079457.2023.2279131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 10/31/2023] [Indexed: 11/30/2023]
Abstract
RESEARCH HIGHLIGHTS A sandwich ELISA was developed to detect EDSV using the mAbs 5G4 and HRP-6G6.The sandwich ELISA maintained high specificity and sensitivity.The sandwich ELISA had equivalent consistency with real-time PCR assay.
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Affiliation(s)
- Qiang Wei
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People's Republic of China
| | - Yanling Gao
- Department of Animal Husbandry Engineering, Henan Agricultural Vocational College, Zhengzhou, People's Republic of China
| | - Yunchao Liu
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People's Republic of China
| | - Qingmei Li
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People's Republic of China
| | - Qianyue Jin
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People's Republic of China
| | - Shujun Chai
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People's Republic of China
| | - Yapeng Song
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Guangxu Xing
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People's Republic of China
| | - Gaiping Zhang
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People's Republic of China
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
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Zhao SS, Qian Q, Chen XX, Lu Q, Xing G, Qiao S, Li R, Zhang G. Porcine reproductive and respiratory syndrome virus triggers Golgi apparatus fragmentation-mediated autophagy to facilitate viral self-replication. J Virol 2024; 98:e0184223. [PMID: 38179942 PMCID: PMC10878038 DOI: 10.1128/jvi.01842-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 01/06/2024] Open
Abstract
Macroautophagy/autophagy is a cellular degradation and recycling process that maintains the homeostasis of organisms. A growing number of studies have reported that autophagy participates in infection by a variety of viruses. Porcine reproductive and respiratory syndrome virus (PRRSV) causes severe financial losses to the global swine industry. Although much research has shown that PRRSV triggers autophagy for its own benefits, the exact molecular mechanisms involved in PRRSV-triggered autophagy remain to be fully elucidated. In the current study, we demonstrated that PRRSV infection significantly induced Golgi apparatus (GA) fragmentation, which promoted autophagy to facilitate viral self-replication. Mechanistically, PRRSV nonstructural protein 2 was identified to interact with and degrade the Golgi reassembly and stacking protein 65 dependent on its papain-like cysteine protease 2 activity, resulting in GA fragmentation. Upon GA fragmentation, GA-resident Ras-like protein in brain 2 was disassociated from Golgi matrix protein 130 and subsequently bound to unc-51 like autophagy activating kinase 1 (ULK1), which enhanced phosphorylation of ULK1 and promoted autophagy. Taken together, all these results expand the knowledge of PRRSV-triggered autophagy as well as PRRSV pathogenesis to support novel potential avenues for prevention and control of the virus. More importantly, these results provide the detailed mechanism of GA fragmentation-mediated autophagy, deepening the understanding of autophagic processes.IMPORTANCEPorcine reproductive and respiratory syndrome virus (PRRSV) infection results in a serious swine disease affecting pig farming worldwide. Despite that numerous studies have shown that PRRSV triggers autophagy for its self-replication, how PRRSV induces autophagy is incompletely understood. Here, we identify that PRRSV Nsp2 degrades GRASP65 to induce GA fragmentation, which dissociates RAB2 from GM130 and activates RAB2-ULK1-mediated autophagy to enhance viral replication. This work expands our understanding of PRRSV-induced autophagy and PRRSV replication, which is beneficial for anti-viral drug development.
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Affiliation(s)
- Shuang-shuang Zhao
- College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Qisheng Qian
- College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Xin-xin Chen
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Qingxia Lu
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Guangxu Xing
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Songlin Qiao
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Rui Li
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Gaiping Zhang
- College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
- Longhu Modern Immunology Laboratory, Zhengzhou, Henan, China
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Guo Z, Lu Q, Jin Q, Li P, Xing G, Zhang G. Phylogenetically evolutionary analysis provides insights into the genetic diversity and adaptive evolution of porcine deltacoronavirus. BMC Vet Res 2024; 20:22. [PMID: 38200538 PMCID: PMC10782762 DOI: 10.1186/s12917-023-03863-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
BACKGROUND Porcine deltacoronavirus (PDCoV) is one of the emerging swine enteric coronaviruses (SECoVs), which has been widely prevalent in the North America and Asia. In addition to causing severe diarrhea in piglets, PDCoV also shows the potential to infect diverse host species, including calves, chickens, turkey poults, and humans. However, the clinical pathogenicity and genetic evolution of PDCoV is still not fully understood. RESULTS Here, we recorded an outbreak of a novel recombinant PDCoV strain (CHN-HeN06-2022) in a large nursery fattening pig farm. Genomic analysis showed that the CHN-HeN06-2022 strain shared 98.3-98.7% sequence identities with the Chinese and American reference strains. To clarify the evolutionary relationships, phylogenetic analysis was performed using the PDCoV genome sequences available in the GenBank database. Based on genetic distance and geographical distribution, the phylogenetic tree clearly showed that all the PDCoV sequences could be divided into lineage 1 and lineage 2, which were further classified into sublineage 1.1 (Chinese strains), 1.2 (the North American strains), 2.1 (the Southeast Asian strains), and 2.2 (Chinese strains). Corresponding to the evolutionary tree, we found that, compared to lineage 1, lineage 2 strains usually contain a continuous 6-nt deletion in Nsp2 and a 9-nt deletion in Nsp3, respectively. Furthermore, recombination analysis suggested that the CHN-HeN06-2022 occurred segments exchange crossed Nsp2 and Nsp3 region between sublineage 1.1 and sublineage 2.1. Combined with previously reported recombinant strains, the highest recombination frequency occurred in Nsp2, Nsp3, and S gene. Additionally, we identified a total of 14 amino acid sites under positive selection in spike protein, most of which are located in the regions related with the viral attachment, receptor binding, and membrane fusion. CONCLUSIONS Taken together, our studies provide novel insights into the genetic diversity and adaptive evolution of PDCoV. It would be helpful to the development of vaccine and potential antiviral agent.
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Affiliation(s)
- Zhenhua Guo
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Qingxia Lu
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Qianyue Jin
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Peng Li
- Vet Diagnostic & Production Animal Medicine, Iowa State University, Ames, IA, USA
| | - Guangxu Xing
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Gaiping Zhang
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China.
- School of Advanced Agricultural Sciences, Peking University, Beijing, China.
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China.
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Feng H, Wang F, Li N, Xu Q, Zheng G, Sun X, Hu M, Li X, Xing G, Zhang G. Use of tree-based machine learning methods to screen affinitive peptides based on docking data. Mol Inform 2023; 42:e202300143. [PMID: 37696773 DOI: 10.1002/minf.202300143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 09/03/2023] [Accepted: 09/11/2023] [Indexed: 09/13/2023]
Abstract
Screening peptides with good affinity is an important step in peptide-drug discovery. Recent advancement in computer and data science have made machine learning a useful tool in accurately affinitive-peptide screening. In current study, four different tree-based algorithms, including Classification and regression trees (CART), C5.0 decision tree (C50), Bagged CART (BAG) and Random Forest (RF), were employed to explore the relationship between experimental peptide affinities and virtual docking data, and the performance of each model was also compared in parallel. All four algorithms showed better performances on dataset pre-scaled, -centered and -PCA than other pre-processed dataset. After model re-built and hyperparameter optimization, the optimal C50 model (C50O) showed the best performances in terms of Accuracy, Kappa, Sensitivity, Specificity, F1, MCC and AUC when validated on test data and an unknown PEDV datasets evaluation (Accuracy=80.4 %). BAG and RFO (the optimal RF), as two best models during training process, did not performed as expecting during in testing and unknown dataset validations. Furthermore, the high correlation of the predictions of RFO and BAG to C50O implied the high stability and robustness of their prediction. Whereas although the good performance on unknown dataset, the poor performance in test data validation and correlation analysis indicated CARTO could not be used for future data prediction. To accurately evaluate the peptide affinity, the current study firstly gave a tree-model competition on affinitive peptide prediction by using virtual docking data, which would expand the application of machine learning algorithms in studying PepPIs and benefit the development of peptide therapeutics.
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Affiliation(s)
- Hua Feng
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Fangyu Wang
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Ning Li
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, China
| | - Qian Xu
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Guanming Zheng
- Public Health and Preventive Medicine Teaching and Research Center, Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Xuefeng Sun
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Man Hu
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Xuewu Li
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Guangxu Xing
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Gaiping Zhang
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
- Longhu Modern Immunology Laboratory, Zhengzhou, China
- School of Advanced Agricultural sciences, Peking University, Beijing, China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, Jiangsu, China
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Pang J, Tian X, Han X, Yuan J, Li L, You Y, Zhou Y, Xing G, Li R, Wang Z. Computationally-driven epitope identification of PEDV N-protein and its application in development of immunoassay for PEDV detection. J Pharm Biomed Anal 2023; 235:115660. [PMID: 37598469 DOI: 10.1016/j.jpba.2023.115660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/16/2023] [Accepted: 08/16/2023] [Indexed: 08/22/2023]
Abstract
The nucleocapsid (N) protein is a suitable candidate for early diagnosis of porcine epidemic diarrhea virus (PEDV). Here, we identified the linear B-cell epitopes of the PEDV N-protein by integrating a computational-experimental framework and constructed three-dimensional (3D) structure model of the N protein using the ColabFold program in Google Colaboratory. Furthermore, we prepared the monoclonal antibodies against the predicted epitopes and recombinant N protein, respectively, and selected pairing mAbs (named 9C4 and 3C5) to develop a double-antibody sandwich immunochromatographic test strip using CdSe/ZnS quantum dots (QDs)-labelled 9C4 and 3C5 as capture and detection antibodies, respectively. This strip can specifically detect PEDV within 10 min with a detection limit of less than 6.25 × 103 TCID50/mL. In comparison with RT-PCR for testing 90 clinical samples, the relative sensitivity and specificity of the strip were found to be 98.0% and 100%, respectively, with a concordance rate of 98.9% and a kappa value of 0.978, indicating that QDs-ICTS is a reliable method for the application of PEDV detection in clinical samples.
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Affiliation(s)
- Junzeng Pang
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Xiangqin Tian
- Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang 453003, China
| | - Xiao Han
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Jiakang Yuan
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Linyue Li
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Yonghe You
- Sanquan College of Xinxiang Medical University, Xinxiang 453000, China
| | - Yanlin Zhou
- Sanquan College of Xinxiang Medical University, Xinxiang 453000, China
| | - Guangxu Xing
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Renfeng Li
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China.
| | - Ziliang Wang
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
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Feng H, Wang F, Li N, Xu Q, Zheng G, Sun X, Hu M, Xing G, Zhang G. A Random Forest Model for Peptide Classification Based on Virtual Docking Data. Int J Mol Sci 2023; 24:11409. [PMID: 37511165 PMCID: PMC10380188 DOI: 10.3390/ijms241411409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 06/25/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
The affinity of peptides is a crucial factor in studying peptide-protein interactions. Despite the development of various techniques to evaluate peptide-receptor affinity, the results may not always reflect the actual affinity of the peptides accurately. The current study provides a free tool to assess the actual peptide affinity based on virtual docking data. This study employed a dataset that combined actual peptide affinity information (active and inactive) and virtual peptide-receptor docking data, and different machine learning algorithms were utilized. Compared with the other algorithms, the random forest (RF) algorithm showed the best performance and was used in building three RF models using different numbers of significant features (four, three, and two). Further analysis revealed that the four-feature RF model achieved the highest Accuracy of 0.714 in classifying an independent unknown peptide dataset designed with the PEDV spike protein, and it also revealed overfitting problems in the other models. This four-feature RF model was used to evaluate peptide affinity by constructing the relationship between the actual affinity and the virtual docking scores of peptides to their receptors.
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Affiliation(s)
- Hua Feng
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Fangyu Wang
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Ning Li
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Qian Xu
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Guanming Zheng
- Public Health and Preventive Medicine Teaching and Research Center, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Xuefeng Sun
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Man Hu
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Guangxu Xing
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Gaiping Zhang
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
- Longhu Modern Immunology Laboratory, Zhengzhou 450002, China
- School of Advanced Agricultural Sciences, Peking University, Beijing 100871, China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China
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Guo Z, Jin Q, Li P, Xing G, Lu Q, Zhang G. Potential cross-species transmission risks of emerging swine enteric coronavirus to human beings. J Med Virol 2023; 95:e28919. [PMID: 37386904 DOI: 10.1002/jmv.28919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 07/01/2023]
Affiliation(s)
- Zhenhua Guo
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Qianyue Jin
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Peng Li
- Vet Diagnostic & Production Animal Medicine, Iowa State University, Ames, Iowa, USA
| | - Guangxu Xing
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Qingxia Lu
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Gaiping Zhang
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
- School of Advanced Agricultural Sciences, Peking University, Beijing, China
- Longhu Modern Immunity Labrotary, Zhengzhou, Henan, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China
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Chen X, Wei Q, Si F, Wang F, Lu Q, Guo Z, Chai Y, Zhu R, Xing G, Jin Q, Zhang G. Design and Identification of a Novel Antiviral Affinity Peptide against Fowl Adenovirus Serotype 4 (FAdV-4) by Targeting Fiber2 Protein. Viruses 2023; 15:v15040821. [PMID: 37112802 PMCID: PMC10146638 DOI: 10.3390/v15040821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/19/2023] [Accepted: 03/21/2023] [Indexed: 04/29/2023] Open
Abstract
Outbreaks of hydropericardium hepatitis syndrome caused by fowl adenovirus serotype 4 (FAdV-4) with a novel genotype have been reported in China since 2015, with significant economic losses to the poultry industry. Fiber2 is one of the important structural proteins on FAdV-4 virions. In this study, the C-terminal knob domain of the FAdV-4 Fiber2 protein was expressed and purified, and its trimer structure (PDB ID: 7W83) was determined for the first time. A series of affinity peptides targeting the knob domain of the Fiber2 protein were designed and synthesized on the basis of the crystal structure using computer virtual screening technology. A total of eight peptides were screened using an immunoperoxidase monolayer assay and RT-qPCR, and they exhibited strong binding affinities to the knob domain of the FAdV-4 Fiber2 protein in a surface plasmon resonance assay. Treatment with peptide number 15 (P15; WWHEKE) at different concentrations (10, 25, and 50 μM) significantly reduced the expression level of the Fiber2 protein and the viral titer during FAdV-4 infection. P15 was found to be an optimal peptide with antiviral activity against FAdV-4 in vitro with no cytotoxic effect on LMH cells up to 200 μM. This study led to the identification of a class of affinity peptides designed using computer virtual screening technology that targeted the knob domain of the FAdV-4 Fiber2 protein and may be developed as a novel potential and effective antiviral strategy in the prevention and control of FAdV-4.
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Affiliation(s)
- Xiao Chen
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Qiang Wei
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Fusheng Si
- Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Fangyu Wang
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Qingxia Lu
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Zhenhua Guo
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Yongxiao Chai
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Rongfang Zhu
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
- College of Life Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Guangxu Xing
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Qianyue Jin
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Gaiping Zhang
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China
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Xu Q, Wang F, Jiao W, Zhang M, Xing G, Feng H, Sun X, Hu M, Zhang G. Virtual Screening-Based Peptides Targeting Spike Protein to Inhibit Porcine Epidemic Diarrhea Virus (PEDV) Infection. Viruses 2023; 15:v15020381. [PMID: 36851595 PMCID: PMC9965349 DOI: 10.3390/v15020381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 01/14/2023] [Accepted: 01/21/2023] [Indexed: 01/31/2023] Open
Abstract
Due to the rapid mutation of porcine epidemic diarrhea virus (PEDV), existing vaccines cannot provide sufficient immune protection for pigs. Therefore, it is urgent to design the affinity peptides for the prevention and control of this disease. In this study, we made use of a molecular docking technology for virtual screening of affinity peptides that specifically recognized the PEDV S1 C-terminal domain (CTD) protein for the first time. Experimentally, the affinity, cross-reactivity and sensitivity of the peptides were identified by an enzyme-linked immunosorbent assay (ELISA) and a surface plasmon resonance (SPR) test, separately. Subsequently, Cell Counting Kit-8 (CCK-8), quantitative real-time PCR (qRT-PCR), Western blot and indirect immunofluorescence were used to further study the antiviral effect of different concentrations of peptide 110766 in PEDV. Our results showed that the P/N value of peptide 110766 at 450 nm reached 167, with a KD value of 216 nM. The cytotoxic test indicated that peptide 110766 was not toxic to vero cells. Results of the absolute quantitative PCR revealed that different concentrations (3.125 μM, 6.25 μM, 12.5 μM, 25 μM, 50 μM, 100 μM, 200 μM) of peptide 110766 could significantly reduce the viral load of PEDV compared with the virus group (p < 0.0001). Similarly, results of Western blot and indirect immunofluorescence also suggested that the antiviral effect of peptide 110766 at 3.125 is still significant. Based on the above research, high-affinity peptide 110766 binding to the PEDV S1-CTD protein was attained by a molecular docking technology. Therefore, designing, screening, and identifying affinity peptides can provide a new method for the development of antiviral drugs for PEDV.
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Affiliation(s)
- Qian Xu
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yang ling, Xianyang 712100, China
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou 450002, China
| | - Fangyu Wang
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou 450002, China
| | - Wenqiang Jiao
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou 450002, China
| | - Mengting Zhang
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yang ling, Xianyang 712100, China
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou 450002, China
| | - Guangxu Xing
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou 450002, China
| | - Hua Feng
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou 450002, China
| | - Xuefeng Sun
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou 450002, China
| | - Man Hu
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou 450002, China
| | - Gaiping Zhang
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yang ling, Xianyang 712100, China
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou 450002, China
- Longhu Modern Immunology Laboratory, Zhengzhou 450046, China
- School of Advanced Agricultural Sciences, Peking University, Beijing 100871, China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China
- Correspondence:
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12
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Zhang Y, Li Q, Wang R, Wang L, Wang X, Luo J, Xing G, Zheng G, Wan B, Guo J, Zhang G. Differentiation of Classical Swine Fever Virus Virulent and Vaccine Strains by CRISPR/Cas13a. Microbiol Spectr 2022; 10:e0089122. [PMID: 36173294 PMCID: PMC9603908 DOI: 10.1128/spectrum.00891-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 07/10/2022] [Indexed: 12/30/2022] Open
Abstract
As a notifiable terrestrial and aquatic animal disease listed by World Organisation for Animal Health (formerly the Office International des Epizooties [OIE]), classical swine fever (CSF) has caused great economic losses to the swine industry worldwide during recent decades. Differentiation of infected and vaccinated animals (DIVA) is urgent for eradication of CSF. In this study, a diagnostic platform based on CRISPR/Cas13a was established with the ability to differentiate between classical swine fever virus (CSFV) virulent and vaccine strains. In combination with reverse transcription recombinase-aided amplification (RT-RAA), the detection limit for CSFV synthetic RNA templates reached 3.0 × 102 copies/μL. In addition, with boiling and chemical reduction, heating unextracted diagnostic samples to obliterate nucleases (HUDSON) treatment was introduced to inactivate nucleases and release viral genome, achieving robust pretreatment of tested sample before CRISPR/Cas13a detection without the need to extract viral nucleic acids. HUDSON-RT-RAA-CRISPR/Cas13a can directly detect cell cultures of virulent Shimen strain and vaccine hog cholera lapinized virus (HCLV) strain, with the detection limit of 3.5 × 102 copies/μL and 1.8 × 102 copies/μL, respectively, which was equally sensitive to nested PCR (nPCR) and 100 times more sensitive than antigen enzyme-linked immunosorbent assay (ELISA). Meanwhile, HUDSON-RT-RAA-CRISPR/Cas13a showed no cross-reactivity with bovine viral diarrhea virus (BVDV), atypical porcine pestivirus (APPV), porcine reproductive and respiratory syndrome virus (PRRSV), porcine epidemic diarrhea virus (PEDV), African swine fever virus (ASFV), pseudorabies virus (PRV), and porcine circovirus 2 (PCV2), exhibiting good specificity. At last, a total of 50 pig spleen samples with suspected clinical signs were also assayed with HUDSON-RT-RAA-CRISPR/Cas13a, nPCR, and antigen ELISA in parallel. HUDSON-RT-RAA-CRISPR/Cas13a showed 100.0% with nPCR and 82.0% coincident rate with antigen ELISA, respectively. IMPORTANCE Classical swine fever (CSF) is a World Organisation for Animal Health (formerly the Office International des Epizooties [OIE]) notifiable terrestrial and aquatic animal disease, causing great economic losses to the swine industry worldwide during the past decades. Due to the use of the most effective and safe attenuated live vaccine for CSF prevention, differentiation of infected and vaccinated pigs is vital work, as well as a bottleneck for eradication of CSF. Methods with the ability to precisely differentiate classical swine fever virus (CSFV) virulent strains from vaccine strain hog cholera lapinized virus (HCLV) are urgently needed. Combining the high sensitivity of isothermal recombinase-aided amplification (RAA) with the accurate molecular sensing ability of Cas13a, we presented a novel method for CSFV detection without the need to extract viral nucleic acids, which showed great advantage to traditional detection methods for precise differentiation of CSFV virulent strains and vaccine strain, providing a novel powerful tool for CSF eradication.
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Affiliation(s)
- Yuhang Zhang
- International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
| | - Qingmei Li
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Ruining Wang
- Henan University of Animal Husbandry and Economy, College of Veterinary Medicine, Zhengzhou, China
| | - Li Wang
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Xun Wang
- International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
| | - Jun Luo
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Guangxu Xing
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Guanmin Zheng
- Public Health and Preventive Medicine Teaching and Research Center, Henan University of Chinese Medicine, Zhengzhou, China
| | - Bo Wan
- International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
| | - Junqing Guo
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Gaiping Zhang
- International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonose, Yangzhou University, Yangzhou, China
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Wang F, Hu M, Li N, Sun X, Xing G, Zheng G, Jin Q, Liu Y, Cui C, Zhang G. Precise Assembly of Multiple Antigens on Nanoparticles with Specially Designed Affinity Peptides. ACS Appl Mater Interfaces 2022; 14:39843-39857. [PMID: 35998372 DOI: 10.1021/acsami.2c10684] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Antigen proteins, assembled on nanoparticles, can be recognized by antigen-presenting cells effectively to enhance antigen immunogenicity. The ability to simultaneously display multiantigens on the same nanoparticle could have numerous applications but remained technical challenges. Here, we described a method for precise assembly of multiple antigens on nanoparticles with specially designed affinity peptides. First, we designed and screened affinity peptides with high affinity and specificity, which could respectively target the key amino acid residues of classical swine fever virus (CSFV) E2 protein or porcine circovirus type 2 capsid protein (PCV2 Cap) accurately. Then, we conjugated the antigen proteins to poly(lactic acid-glycolic acid) copolymer (PLGA) and Gram-positive enhancer matrix (GEM) nanoparticles through the peptides and perfectly assembled two kinds of multiantigen display nanoparticles with different particle sizes. Subsequently, the immunological properties of the assembled nanoparticles were tested. The results showed that the antigen display nanoparticles could promote the maturation, phagocytosis, and proinflammatory effects of antigen-presenting cells (APCs). Besides, compared with the antigen proteins, multiantigen display nanoparticles could induce much higher levels of antibodies and neutralizing antibodies in mice. This strategy may provide a technical support for the study of protein structure and the research and development of polyvalent vaccines.
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Affiliation(s)
- Fangyu Wang
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450000, China
| | - Man Hu
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450000, China
| | - Ning Li
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan 450000, China
| | - Xuefeng Sun
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450000, China
| | - Guangxu Xing
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450000, China
| | - Guanmin Zheng
- Public Health and Preventive Medicine Teaching and Research Center, Henan University of Chinese Medicine, Zhengzhou, Henan 450000, China
| | - Qianyue Jin
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450000, China
| | - Yunchao Liu
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450000, China
| | - Chenxu Cui
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan 450000, China
| | - Gaiping Zhang
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450000, China
- School of Advanced Agricultural Sciences, Peking University, Beijing 100871, China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, Jiangsu 225009, China
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Hu M, Wang F, Li N, Xing G, Sun X, Zhang Y, Cao S, Cui N, Zhang G. An antigen display system of GEM nanoparticles based on affinity peptide ligands. Int J Biol Macromol 2021; 193:574-584. [PMID: 34699894 DOI: 10.1016/j.ijbiomac.2021.10.135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 10/08/2021] [Accepted: 10/18/2021] [Indexed: 10/20/2022]
Abstract
Gram-positive enhancer matrix (GEM) nanoparticles are often used in mucosal immunity, preparation of subunit vaccines or as an immune adjuvant due to its good immunological activities in recent years. Here, we designed and screened out a high affinity peptide ligand PL23, which could specifically target the non-epitope region of Classic Swine Fever Virus (CSFV) E2 protein, by virtual screening technology, enzyme linked immunosorbent assay (ELISA) and surface plasmon resonance (SPR) test. The OD value of PL23 at 450 nm was reached 1.982, and the KD value of it was 90.12 nM. Its binding capacity to protein was verified by SDS-PAGE as well. PL23 was subsequently conjugated to GEM nanoparticles by dehydration synthesis generating GEM-PL23 particles, and the GEM-PL-E2 particles were assembled after incubated with CSFV E2 protein. The cytotoxic test indicated that PL23, CSFV E2 protein, GEM nanoparticles, GEM-PL23 particles and GEM-PL-E2 particles were not toxic to cells and GEM nanoparticles could significantly promote the growth of APCs at high concentration for 1 h, p<0.001. In addition, GEM nanoparticles could promote the uptake of antigen by APCs. The cytokines tests suggested that GEM-PL-E2 particles could promote innate immune responses, regulate adaptive immune responses generated by T cells and APCs, and promote the differentiation and maturation of dendritic cells without producing inflammasomes. The results of immunological activity identification showed GEM-PL-E2 particles induced higher levels of both neutralizing antibodies and anti-CSFV antibodies than CSFV E2 protein in mice. This strategy provided a new, simpler, faster and cheaper method for assembling GEM nanoparticles, using an affinity peptide ligand replaced the protein anchor (PA), and provided a better application prospect for the application of GEM particles.
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Affiliation(s)
- Man Hu
- College of Veterinary Medicine, Jilin University, Changchun, Jilin, China; Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Fangyu Wang
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Ning Li
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan, China
| | - Guangxu Xing
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Xuefeng Sun
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Yunshang Zhang
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China
| | - Shuai Cao
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan, China
| | - Ningning Cui
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan, China
| | - Gaiping Zhang
- College of Veterinary Medicine, Jilin University, Changchun, Jilin, China; Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, China.
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15
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Sun X, Qu T, Wang W, Li C, Yang X, He X, Wang Y, Xing G, Xu X, Yang L, Zhang H. Untargeted lipidomics analysis in women with intrahepatic cholestasis of pregnancy: a cross-sectional study. BJOG 2021; 129:880-888. [PMID: 34797934 DOI: 10.1111/1471-0528.17026] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/06/2021] [Indexed: 01/02/2023]
Abstract
OBJECTIVE To compare the plasma lipid profiles in women with normal pregnancies and those with mild or severe intrahepatic cholestasis of pregnancy (ICP). Our goal was to reveal lipidome-wide alterations in ICP and delve into the pathogenesis of ICP from a lipid metabolism perspective. DESIGN Cross-sectional study, including women with normal pregnancies, women with mild ICP and women with severe ICP. SETTING Gansu Provincial Hospital. POPULATION Women with ICP were recruited from October 2019 to March 2020 in Gansu, China. METHODS Untargeted lipidomics was used to analyse differentially expressed plasma lipids in controls, in women with mild ICP and in women with severe ICP (n = 30 per group). For lipidomics, liquid chromatography and Q-Exactive Plus Orbitrap mass spectrometry were performed. MAIN OUTCOME MEASURES Differentially expressed lipids. RESULTS Thirty-three lipids were differentially expressed in the severe and mild ICP groups, compared with the control group, and 20 of those were sphingolipids (ceramide, six species; sphingomyelin, 14 species). All differentially expressed sphingolipids in women with mild ICP were also differentially expressed in women with severe ICP; the fold change and significance of the differential expression were positively correlated with disease severity. CONCLUSIONS We systematically characterized the lipidome-wide alterations in mild and severe ICP groups. The results indicated a link between ICP and disordered sphingolipid homeostasis. TWEETABLE ABSTRACT Abnormal sphingolipid metabolism is involved in the pathogenesis of ICP.
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Affiliation(s)
- X Sun
- Department of Obstetrics, Gansu Provincial Hospital, Lanzhou, Gansu, China
| | - T Qu
- Department of Biotherapy Center, Gansu Provincial Hospital, Lanzhou, Gansu, China
| | - W Wang
- School of Life Science, Northwest Normal University, Lanzhou, Gansu, China
| | - C Li
- Department of Obstetrics, Gansu Provincial Hospital, Lanzhou, Gansu, China
| | - X Yang
- Department of Obstetrics, Gansu Provincial Hospital, Lanzhou, Gansu, China
| | - X He
- Department of Obstetrics, Gansu Provincial Hospital, Lanzhou, Gansu, China
| | - Y Wang
- Department of Obstetrics, Gansu Provincial Hospital, Lanzhou, Gansu, China
| | - G Xing
- Department of Obstetrics, Gansu Provincial Hospital, Lanzhou, Gansu, China
| | - X Xu
- Department of Biotherapy Center, Gansu Provincial Hospital, Lanzhou, Gansu, China
| | - L Yang
- Department of Obstetrics, Gansu Provincial Hospital, Lanzhou, Gansu, China
| | - H Zhang
- Department of Obstetrics, Gansu Provincial Hospital, Lanzhou, Gansu, China
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16
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Chen XX, Zhou X, Guo T, Qiao S, Guo Z, Li R, Jin Q, Hu X, Xing G, Deng R, Wan B, Zhang G. Efficacy of a live attenuated highly pathogenic PRRSV vaccine against a NADC30-like strain challenge: implications for ADE of PRRSV. BMC Vet Res 2021; 17:260. [PMID: 34332554 PMCID: PMC8325048 DOI: 10.1186/s12917-021-02957-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 07/07/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Porcine reproductive and respiratory syndrome virus (PRRSV) infection can cause severe reproductive failure in sows and respiratory distress in pigs of all ages, leading to major economic losses. To date, there are still no effective strategies to prevent and control PRRSV. Antibody-dependent enhancement (ADE), a phenomenon in which preexisting non-neutralizing antibodies or sub-neutralizing antibodies facilitate virus entry and replication, may be a significant obstacle in the development of effective vaccines for many viruses, including PRRSV. However, the contribution of ADE to PRRSV infection remains controversial, especially in vivo. Whether attenuated PRRSV vaccines prevent or worsen subsequent disease in pigs infected by novel PRRSV strains requires more research. In the present study, in vivo experiments were conducted to evaluate ADE under different immune statuses, which were produced by waiting different lengths of time after vaccination with a commercially available attenuated highly pathogenic PRRSV (HP-PRRSV) vaccine (JXA1-R) before challenging the pigs with a novel heterologous NADC30-like strain. RESULTS Piglets that were vaccinated before being challenged with PRRSV exhibited lower mortality rates, lower body temperatures, higher bodyweight gain, and lower viremia. These results demonstrate that vaccination with JXA1-R alleviated the clinical signs of PRRSV infection in all vaccinated groups. CONCLUSIONS The obtained data indicate that the attenuated vaccine test here provided partial protection against the NADC30-like strain HNhx. No signs of enhanced PRRSV infection were observed under the applied experimental conditions. Our results provide some insight into the molecular mechanisms underlying vaccine-induced protection or enhancement in PRRSV.
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Affiliation(s)
- Xin-Xin Chen
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, People's Republic of China
| | - Xinyu Zhou
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, People's Republic of China.,College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - Tengda Guo
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, People's Republic of China.,College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - Songlin Qiao
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, People's Republic of China
| | - Zhenhua Guo
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, People's Republic of China
| | - Rui Li
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, People's Republic of China
| | - Qianyue Jin
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, People's Republic of China
| | - Xiaofei Hu
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, People's Republic of China
| | - Guangxu Xing
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, People's Republic of China
| | - Ruiguang Deng
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, People's Republic of China
| | - Bo Wan
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China.
| | - Gaiping Zhang
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan, People's Republic of China. .,College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China. .,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, Jiangsu, People's Republic of China.
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17
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Wang F, Yu Q, Hu M, Xing G, Zhao D, Zhang G. Purification of Classical Swine Fever Virus E2 Subunit Vaccines Based on High Affinity Peptide Ligand. Protein Pept Lett 2021; 28:554-562. [PMID: 33143607 DOI: 10.2174/0929866527666201103152100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/23/2020] [Accepted: 09/28/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND The purification of expressed proteins is the most critical part of subunit-- vaccine production. Protein-purification methods such as affinity chromatography and ion exchange still have the shortcomings of being time consuming and complicated. With the rapid development of computational molecular-simulation technology, structure-based peptide-ligand design has become feasible. Objection: We aimed to apply molecular docking for a peptide ligand designed for classical swine fever virus (CSFV) E2 purification. METHODS Computational-derived peptides were synthesized, and the in vitro binding interaction with E2 was investigated. The effects of purification on E2 were also evaluated. RESULTS The best peptide recognizing E2 was P6, which had a sequence of KKFYWRYWEH. Based on kinetic surface plasmon resonance (SPR) analysis, the apparent affinity constant of P6 was found to be 148 nM. Importantly, P6 showed suitable binding affinity and specificity for E2 purification from transgenic rice seeds. Evaluation of immune antibodies in mice showed that the antibody- blocking rate on day 42 after inoculation reached 86.18% and 90.68%. CONCLUSION The computational-designed peptide in this study has high sensitivity and selectivity and is thus useful for the purification of CSFV E2. The novel method of design provided a broad platform and powerful tool for protein-peptide screening, as well as new insights into CSFV vaccine design.
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Affiliation(s)
- Fangyu Wang
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Qiuying Yu
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China
| | - Man Hu
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Guangxu Xing
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Dong Zhao
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Gaiping Zhang
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
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18
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Zheng XX, Li R, Qiao S, Chen XX, Zhang L, Lu Q, Xing G, Zhou EM, Zhang G. Vimentin rearrangement by phosphorylation is beneficial for porcine reproductive and respiratory syndrome virus replication in vitro. Vet Microbiol 2021; 259:109133. [PMID: 34087674 DOI: 10.1016/j.vetmic.2021.109133] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 05/21/2021] [Indexed: 10/21/2022]
Abstract
Vimentin, a member of intermediate filaments, has been documented to be involved in viral infections. Despite several studies focusing on its involvement in porcine reproductive and respiratory syndrome virus (PRRSV) infection, the detailed mechanisms by which vimentin takes effect remain to be fully elucidated. In the present study, we identified a previously unrecognized role of vimentin rearrangement in PRRSV replication. We monitored that PRRSV infection induced vimentin reorganization during post-entry stage, which was beneficial for viral replication. In detail, the serine residue of vimentin was phosphorylated at position 38 (Ser38) by calcium calmodulin-dependent protein kinase II gamma (CaMKIIγ), and vimentin filaments reorganized into cage-like structures enwrapping PRRSV replication complex (RC) at the perinuclear location. Taken together, these results expand the knowledge of PRRSV replication, and provide novel targets for prevention and control of PRRSV.
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Affiliation(s)
- Xin-Xian Zheng
- College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, China; Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Rui Li
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China.
| | - Songlin Qiao
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Xin-Xin Chen
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Longxiang Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, China; Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Qingxia Lu
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Guangxu Xing
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - En-Min Zhou
- College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, China
| | - Gaiping Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, China; Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China; College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, China.
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Zhang Y, Li Q, Guo J, Li D, Wang L, Wang X, Xing G, Deng R, Zhang G. An Isothermal Molecular Point of Care Testing for African Swine Fever Virus Using Recombinase-Aided Amplification and Lateral Flow Assay Without the Need to Extract Nucleic Acids in Blood. Front Cell Infect Microbiol 2021; 11:633763. [PMID: 33816338 PMCID: PMC8010139 DOI: 10.3389/fcimb.2021.633763] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 02/08/2021] [Indexed: 11/13/2022] Open
Abstract
African swine fever (ASF) is a highly contagious and usually deadly porcine infectious disease listed as a notifiable disease by the World Organization for Animal Health (OIE). It has brought huge economic losses worldwide, especially since 2018, the first outbreak in China. As there are still no effective vaccines available to date, diagnosis of ASF is essential for its surveillance and control, especially in areas far from city with limited resources and poor settings. In this study, a sensitive, specific, rapid, and simple molecular point of care testing for African swine fever virus (ASFV) B646L gene in blood samples was established, including treatment of blood samples with simple dilution and boiling for 5 min, isothermal amplification with recombinase-aided amplification (RAA) at 37°C in a water bath for 10 min, and visual readout with lateral flow assay (LFA) at room temperature for 10–15 min. Without the need to extract viral DNA in blood samples, the intact workflow from sampling to final diagnostic decision can be completed with minimal equipment requirement in 30 min. The detection limit of RAA-LFA for synthesized B646L gene-containing plasmid was 10 copies/μl, which was 10-fold more sensitive than OIE-recommended PCR and quantitative PCR. In addition, no positive readout of RAA-LFA was observed in testing classical swine fever virus, porcine reproductive and respiratory syndrome virus, porcine epidemic diarrhea virus, pseudorabies virus and porcine circovirus 2, exhibiting good specificity. Evaluation of clinical blood samples of RAA-LFA showed 100% coincident rate with OIE-recommended PCR, in testing both extracted DNAs and treated bloods. We also found that some components in blood samples greatly inhibited PCR performance, but had little effect on RAA. Inhibitory effect can be eliminated when blood was diluted at least 32–64-fold for direct PCR, while only a 2–4 fold dilution of blood was suitable for direct RAA, indicating RAA is a better choice than PCR when blood is used as detecting sample. Taken together, we established an sensitive, specific, rapid, and simple RAA-LFA for ASFV molecular detection without the need to extract viral DNA, providing a good choice for point of care testing of ASF diagnosis in the future.
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Affiliation(s)
- Yuhang Zhang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
| | - Qingmei Li
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Junqing Guo
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Dongliang Li
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
| | - Li Wang
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Xun Wang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
| | - Guangxu Xing
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Ruiguang Deng
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Gaiping Zhang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China.,Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonose, Yangzhou University, Yangzhou, China
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20
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Wei Q, Bai Y, Song Y, Liu Y, Yu W, Sun Y, Wang L, Deng R, Xing G, Zhang G. Generation and immunogenicity analysis of recombinant classical swine fever virus glycoprotein E2 and E rns expressed in baculovirus expression system. Virol J 2021; 18:44. [PMID: 33627167 PMCID: PMC7903030 DOI: 10.1186/s12985-021-01507-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 02/08/2021] [Indexed: 11/12/2022] Open
Abstract
Classical swine fever (CSF) caused by the classical swine fever virus (CSFV) is a highly contagious swine disease resulting in large economical losses worldwide. The viral envelope glycoprotein E2 and Erns are major targets for eliciting antibodies against CSFV in infected animals. In this report, the glycoprotein E2 and Erns were expressed using the baculovirus system and their protective immunity in rabbits were tested. Twenty CSFV seronegative rabbits were randomly divided into five groups. Each rabbit was intramuscularly immunized with CSFV-E2, CSFV-Erns, or their combination (CSFV-E2 + Erns). Besides, a commercial CSFV vaccine (C-strain) and PBS were used as positive or negative controls, respectively. Four weeks after the second immunization, all the rabbits were challenged with 100 RID50 of CSFV C-strain. High levels of CSFV E2-specific antibody, neutralizing antibody and cellular immune responses to CSFV were elicited in the rabbits inoculated with C-strain, CSFV-E2, and CSFV-E2 + Erns. And the rabbits inoculated with the three vaccines received complete protection against CSFV C-strain. However, no neutralizing antibody was detected in the Erns vaccinated rabbits and the rabbits exhibited fever typical of CSFV, suggesting the Erns alone is not able to induce a protective immune response. Taken together, while the Erns could not confer protection against CSFV, E2 and E2 + Erns could not only elicit humoral and cell-mediated immune responses but also confer complete protection against CSFV C-strain in rabbits.
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Affiliation(s)
- Qiang Wei
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Yilin Bai
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China.,College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, China
| | - Yapeng Song
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China.,College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, Henan, China
| | - Yunchao Liu
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Wei Yu
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China.,College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, China
| | - Yaning Sun
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China.,Henan Baiao Biological Project Co., Ltd., Zhengzhou, 450002, China
| | - Li Wang
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Ruiguang Deng
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Guangxu Xing
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Gaiping Zhang
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China. .,College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, Henan, China. .,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, Jiangsu Province, China.
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21
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Zhang F, Luo J, Teng M, Xing G, Guo J, Zhang Y. Study on the Dynamic Proliferation of JEV in BHK-21 Cells. Intervirology 2021; 64:1-7. [PMID: 33401269 DOI: 10.1159/000510585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 07/29/2020] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION Epidemic Japanese encephalitis is one of the most important zoonotic diseases that cause central nervous system damage. The vaccination has become the most effective and economical measure for its control. Hence, real-time monitoring of Japanese encephalitis virus (JEV) proliferation is crucial to optimize virus inoculation, culturing conditions, and virus harvest time. METHODS The proliferation dynamics of JEV in BHK-21 cells was studied by combining the established quantitative PCR method with the conventional TCID50 assay in this study. RESULTS The proliferation curve determined by the 2 methods has a definite parallel relationship, but the quantitative real-time PCR method (4 h) is faster and more sensitive than the TCID50 method (3-4 days). The determination results of TCID50 showed that the highest viral titer was 105.44 TCID50/0.1 mL and 104.86 TCID50/0.1 mL in cell suspension and culture supernate, respectively, while the virus RNA copies reached the peak at 1.0 × 107.5 copies/µL and 1.0 × 105.6 copies/µL in cell suspension and culture supernate, respectively. CONCLUSION The comprehensive analysis showed that the best time for JEV proliferation in BHK-21 cell was 60 h post infection.
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Affiliation(s)
- Fuliang Zhang
- College of Veterinary Medicine, Northwest A & F University, Yangling, China
- College of Biology and Food Engineering, Anyang Institute of Technology, Anyang, China
| | - Jun Luo
- Henan Provincial Key Laboratory of Animal Immunology, Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Academy of Agriculture Sciences, Zhengzhou, China
| | - Man Teng
- Henan Provincial Key Laboratory of Animal Immunology, Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Academy of Agriculture Sciences, Zhengzhou, China
| | - Guangxu Xing
- Henan Provincial Key Laboratory of Animal Immunology, Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Academy of Agriculture Sciences, Zhengzhou, China
| | - Junqing Guo
- Henan Provincial Key Laboratory of Animal Immunology, Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Academy of Agriculture Sciences, Zhengzhou, China
| | - Yihua Zhang
- College of Veterinary Medicine, Northwest A & F University, Yangling, China,
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22
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Wang F, Li N, Wang C, Xing G, Cao S, Xu Q, Zhang Y, Hu M, Zhang G. DPL: a comprehensive database on sequences, structures, sources and functions of peptide ligands. Database (Oxford) 2020; 2020:5979899. [PMID: 33216893 PMCID: PMC7678785 DOI: 10.1093/database/baaa089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 09/02/2020] [Accepted: 09/11/2020] [Indexed: 12/02/2022]
Abstract
DPL (http://www.peptide-ligand.cn/) is a comprehensive database of peptide ligand (DPL). DPL1.0 holds 1044 peptide ligand entries and provides references for the study of the polypeptide platform. The data were collected from PubMed-NCBI, PDB, APD3, CAMPR3, etc. The lengths of the base sequences are varied from 3 to78. DPL database has 923 linear peptides and 88 cyclic peptides. The functions of peptides collected by DPL are very wide. It includes 540 entries of antiviral peptides (including SARS-CoV-2), 55 entries of signal peptides, 48 entries of protease inhibitors, 45 entries of anti-hypertension, 37 entries of anticancer peptides, etc. There are 270 different kinds of peptide targets. All peptides in DPL have clear binding targets. Most of the peptides and receptors have 3D structures experimentally verified or predicted by CYCLOPS, I-TASSER and SWISS-MODEL. With the rapid development of the COVID-2019 epidemic, this database also collects the research progress of peptides against coronavirus. In conclusion, DPL is a unique resource, which allows users easily to explore the targets, different structures as well as properties of peptides.
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Affiliation(s)
- Fangyu Wang
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou, Henan Province, 450002, China.,College of Food Science and Technology, Henan Agricultural University, 63#Agricultural Road, Zhengzhou, Henan Province, 450000, PR China
| | - Ning Li
- College of Food Science and Technology, Henan Agricultural University, 63#Agricultural Road, Zhengzhou, Henan Province, 450000, PR China
| | - Chunfeng Wang
- Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, 1# Mianfang Street, Zhengzhou, Henan Province, 450052, China
| | - Guangxu Xing
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou, Henan Province, 450002, China
| | - Shuai Cao
- College of Food Science and Technology, Henan Agricultural University, 63#Agricultural Road, Zhengzhou, Henan Province, 450000, PR China
| | - Qian Xu
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou, Henan Province, 450002, China
| | - Yunshang Zhang
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou, Henan Province, 450002, China
| | - Man Hu
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou, Henan Province, 450002, China
| | - Gaiping Zhang
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, 116# Huayuan Road, Zhengzhou, Henan Province, 450002, China.,College of Food Science and Technology, Henan Agricultural University, 63#Agricultural Road, Zhengzhou, Henan Province, 450000, PR China
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23
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Wang F, Hao J, Li N, Xing G, Hu M, Zhang G. Integrated System for Purification and Assembly of PCV Cap Nano Vaccine Based on Targeting Peptide Ligand. Int J Nanomedicine 2020; 15:8507-8517. [PMID: 33154640 PMCID: PMC7608655 DOI: 10.2147/ijn.s274427] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 10/16/2020] [Indexed: 11/24/2022] Open
Abstract
Purpose The vaccine design has shifted from attenuated or inactivated whole pathogen vaccines to more pure and defined subunit vaccines. The purification of antigen proteins, especially the precise display of antigen regions, has become a key step affecting the effectiveness of subunit vaccines. Materials and Methods This work presents the application of molecular docking for a peptide ligand designed for PCV2 Cap purification and assembly in one step. Based on the PCV2 Cap protein affinity peptide (L11-DYWWQSWE), the amino terminal of PCV2 Cap was covalently coupled with the polylactic acid–glycolic acid copolymer (PLGA) carboxyl terminal through the EDC/NHS method. Results The PLGA had an average diameter of 106 nm. The average diameter increased to 122 nm after the PCV2 Cap protein conjugation, and the Zeta potential shifted from −13.7 mV to −9.6 mV, indicating that the PCV2 Cap protein stably binds to the PLGA. Compared with the free PCV2 Cap protein group, the neutralizing antibody titer was significantly increased on the 14th day after the PLGA-Cap immunization (P < 0.05). The neutralizing antibody level was extremely significant on the 28th day (P < 0.001). The CCK-8 analysis showed that PLGA-Cap had an obvious cytotoxic effect on RAW264.7 cells at the PLGA nanoparticle concentration up to 200 μg/mL but had no obvious cytotoxic effect on DC2.4 cells. Compared with the Cap protein group, the antigen-presenting cells had a stronger antigen uptake capacity and a higher fluorescence in the PLGA-Cap group. The immune effect showed that the level of the neutralizing antibody produced by this structure is much better than that of purified protein and helps improve the immune system response. Conclusion This technology provides a potential new perspective for the rapid enrichment of the antigen protein with the affinity peptide ligand.
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Affiliation(s)
- Fangyu Wang
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, People's Republic of China
| | - Junfang Hao
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, People's Republic of China.,College of Biology and Food, Shangqiu Normal University, Shangqiu, Henan 476000, People's Republic of China
| | - Ning Li
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan 450000, People's Republic of China
| | - Guangxu Xing
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, People's Republic of China
| | - Man Hu
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, People's Republic of China
| | - Gaiping Zhang
- Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, People's Republic of China.,College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450000, People's Republic of China
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24
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Hou J, Li R, Qiao S, Chen XX, Xing G, Zhang G. Elastase-mediated membrane fusion of highly pathogenic porcine reproductive and respiratory syndrome virus at host cell surface. Vet Microbiol 2020; 250:108851. [PMID: 33002681 DOI: 10.1016/j.vetmic.2020.108851] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 09/08/2020] [Indexed: 11/25/2022]
Abstract
Infection by enveloped viruses includes endocytosis and/or membrane fusion at the plasma membrane, where host cell proteases play an essential role. Among them, elastase-mediated infection has been documented for several enveloped viruses. Porcine reproductive and respiratory syndrome virus (PRRSV), an economically critical factor in global swine industry, is previously reported to infect host cells via low pH-dependent clathrin-mediated endocytosis (CME) and undergo membrane fusion in recycling endosomes. In the current study, we identified that elastase was significantly elevated in the lung tissues of highly pathogenic PRRSV (HP-PRRSV)-infected pigs compared to the mock-infected ones. We subsequently demonstrated that elastase contributed to HP-PRRSV infection in both MARC-145 cells and porcine alveolar macrophages (PAMs). Mechanistically, HP-PRRSV entered host cells at the cell surface via elastase-mediated membrane fusion, independent of low pH and CME, and its glycoprotein 5 (GP5) was cleaved by the protease during this process. All these findings deepen our understanding of HP-PRRSV infection, and are beneficial for prevention and control of the disease.
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Affiliation(s)
- Jie Hou
- College of Veterinary Medicine, Jilin University, Changchun 130062, China; Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Rui Li
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China.
| | - Songlin Qiao
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Xin-Xin Chen
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Guangxu Xing
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Gaiping Zhang
- College of Veterinary Medicine, Jilin University, Changchun 130062, China; Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China; College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China.
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25
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Zhang F, Luo J, Teng M, Xing G, Guo J, Zhang Y. Purification of cell-derived Japanese encephalitis virus by dual-mode chromatography. Biotechnol Appl Biochem 2020; 68:547-553. [PMID: 32458417 DOI: 10.1002/bab.1960] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 05/16/2020] [Indexed: 11/09/2022]
Abstract
Purification of the enveloped virus poses a challenge as one must retain viral infectivity to preserve immunogenicity. The traditional process of virus purification is time-consuming, laborious and hard to scale up. Here, a rapid, simple and extensible laboratory program for the purification of Japanese encephalitis virus (JEV) was developed by using differential centrifugation, ultrafiltration, Sepharose 4 fast flow gel chromatography, and CaptoTM Core 700 chromatography. The entire process recovered 61.64% of the original virus, and the purified virus particles maintained good activity and immunogenicity. The purification process described has potential application in large-scale production of high-purity JEV.
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Affiliation(s)
- Fuliang Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, People's Republic of China.,College of Biology and Food Engineering, Anyang Institute of Technology, Anyang, People's Republic of China
| | - Jun Luo
- Henan Provincial Key Laboratory of Animal Immunology, Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Academy of Agriculture Sciences, Zhengzhou, People's Republic of China
| | - Man Teng
- Henan Provincial Key Laboratory of Animal Immunology, Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Academy of Agriculture Sciences, Zhengzhou, People's Republic of China
| | - Guangxu Xing
- Henan Provincial Key Laboratory of Animal Immunology, Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Academy of Agriculture Sciences, Zhengzhou, People's Republic of China
| | - Junqing Guo
- Henan Provincial Key Laboratory of Animal Immunology, Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Academy of Agriculture Sciences, Zhengzhou, People's Republic of China
| | - Yihua Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, People's Republic of China
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26
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Na G, Hu X, Sun Y, Kwee S, Xing G, Xing Y, Zhang G. A highly sensitive monoclonal antibody-based paper sensor for simultaneously detecting valnemulin and tiamulin in porcine liver. J Food Sci 2020; 85:1681-1688. [PMID: 32418205 DOI: 10.1111/1750-3841.15136] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 03/20/2020] [Accepted: 03/28/2020] [Indexed: 11/30/2022]
Abstract
Valnemulin (VAL) and tiamulin (TIA) are pleuromutilin antibiotics used primarily for treating bacterial infections in swine or other food animals. Furthermore, VAL and TIA are also employed as feed additives to promote animal growth. However, the illegal use of VAL and TIA could cause a series of hazards to consumers. Here, VAL was designed to be conjugated with bovine serum protein to prepare immunogen. A highly sensitive monoclonal antibody that recognized both VAL and TIA has been successfully produced. Moreover, an immunochromatographic strip assay for rapidly screening VAL and TIA in porcine liver was established with visual detection limits (cutoff values) of 50 and 25 ng/g, respectively. The IC50 values calculated from the equation of the standard curve were 6.06 and 3.45 ng/g and the limits of detection were 0.96 and 0.29 ng/g for VAL and TIA. According to the recovery experiment results, the test strip exhibited acceptable accuracy and precision. Generally, the proposed strip provided a practical tool for the detection of VAL and TIA. PRACTICAL APPLICATION: We produced a highly sensitive monoclonal antibody and developed an immunoassay strip for simultaneously monitoring TIA and VAL. Additionally it was preliminarily confirmed that the rapid detection tool was suitable for screening TIA and VAL in porcine liver.
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Affiliation(s)
- Guanqiong Na
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China.,Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Xiaofei Hu
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Yaning Sun
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Sharon Kwee
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, TX, 78249, U.S.A
| | - Guangxu Xing
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Yunrui Xing
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Gaiping Zhang
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China.,Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China.,College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, China.,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009, China
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27
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Na G, Hu X, Yang J, Sun Y, Kwee S, Tang L, Xing G, Xing Y, Zhang G. Colloidal gold-based immunochromatographic strip assay for the rapid detection of bacitracin zinc in milk. Food Chem 2020; 327:126879. [PMID: 32442848 DOI: 10.1016/j.foodchem.2020.126879] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 04/08/2020] [Accepted: 04/19/2020] [Indexed: 01/13/2023]
Abstract
In this study, a murine monoclonal antibody (mAb) of 6D2-G10 against bacitracin zinc (BAC) was produced and applied to an immunochromatographic strip (ICS) for the initial detection of BAC in milk. The ICS with a cut-off value of 25 ng/mL could be perceived by the naked eye within 10 min. With the assist of the strip reader, the limit of detection (LOD) was measured as 0.82 ng/mL, the half-maximal inhibitory concentration (IC50) was recorded as 3.16 ng/mL, and the linear detection range was from 0.97 to 10.30 ng/mL. The recoveries ranged from 87.7% to 96.0% with the highest coefficient of variation (CV) of 9.1% in the intra-assay and from 84.3% to 90.2% with the highest CV of 10.7% in the inter-assay. In short, the established ICS provided a serviceable analytical tool for qualitatively and quantitatively monitoring BAC in milk.
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Affiliation(s)
- Guanqiong Na
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Xiaofei Hu
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Jifei Yang
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Yaning Sun
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Sharon Kwee
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA
| | - Liang Tang
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA
| | - Guangxu Xing
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Yunrui Xing
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Gaiping Zhang
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China; College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China.
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Na G, Hu X, Yang J, Sun Y, Kwee S, Tang L, Xing G, Xing Y, Zhang G. A rapid colloidal gold-based immunochromatographic strip assay for monitoring nitroxynil in milk. J Sci Food Agric 2020; 100:1860-1866. [PMID: 31602650 DOI: 10.1002/jsfa.10074] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 09/29/2019] [Accepted: 09/29/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Nitroxynil (NIT) is a veterinary drug against hepatic fluke disease for food-producing cattle and sheep. NIT has a long half-life time in animals since it is highly bound to plasma protein. Therefore NIT possibly remains in animal edible tissues or milk due to drug abuse. In this study, a specific murine monoclonal antibody (mAb) against NIT was prepared and an immunochromatographic strip assay based on the mAb was developed for screening NIT in milk. RESULTS The affinity constant of the anti-NIT mAb was 2.93 × 1010 and the anti-NIT mAb had almost no cross-reactivity with other analogs, so that it showed good specificity. The cutoff value of this test strip was considered to be 50 ng mL-1 by the naked eye. When detected by the strip reader, the half maximum inhibition concentration (IC50 ) of the immunoassay strip was calculated to be 5.716 ng mL-1 and the limit of detection (LOD) was 1.146 ng mL-1 . Intra-assay recoveries from 88.80 to 97.13% were obtained, with the highest coefficient of variation (CV) at 9.01%; inter-assay recoveries ranged from 84.60 to 106.87%, with the highest CV at 9.93%. CONCLUSION The operative procedure of the proposed method can be completed within 10 min. The strip developed in this study was a practical tool for rapid semiquantitative and quantitative detection of NIT in milk. This study suggested great potential for analytically monitoring NIT in other food samples. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Guanqiong Na
- School of Food Science and Technology, Jiangnan University, Wuxi, China
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Xiaofei Hu
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Jifei Yang
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Yaning Sun
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Sharon Kwee
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, TX, USA
| | - Liang Tang
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, TX, USA
| | - Guangxu Xing
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Yunrui Xing
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Gaiping Zhang
- School of Food Science and Technology, Jiangnan University, Wuxi, China
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Sciences, Zhengzhou, China
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
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Yin M, Hu X, Sun Y, Xing Y, Xing G, Wang Y, Li Q, Wang Y, Deng R, Zhang G. Broad-spectrum detection of zeranol and its analogues by a colloidal gold-based lateral flow immunochromatographic assay in milk. Food Chem 2020; 321:126697. [PMID: 32244141 DOI: 10.1016/j.foodchem.2020.126697] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 03/10/2020] [Accepted: 03/24/2020] [Indexed: 11/15/2022]
Abstract
Based on colloidal gold and broad-spectrum monoclonal antibody that binds to zeranol and its five analogues with high sensitivity, a lateral flow immunochromatographic assay (LFIA) in a competitive format was developed to specifically determine residues of zeranol, an illegal growth promoter in livestock. In this study, the assay had high sensitivity and was broad-spectrum only for zeranol and its five analogues, and the results were obtained within 10 min without needing sophisticated procedures. The cutoff values for zeranol and its five analogues were 10 ng/mL, and the IC50 values for zeranol, β-zearalanol, zearalanone, α-zearalenol, β-zearalenol and zearalenone were 1.250, 1.800, 1.775, 1.225, 1.709 and 1.319 ng/mL, respectively. The recovery rates were ranged from 85.6 to 93.9%, with the coefficient of variations less than 12.4%. The results demonstrated that the LFIA could be used for rapid, simultaneous, semi-quantitative and quantitative detection of residues of zeranol and its five analogous in milk.
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Affiliation(s)
- Mengqi Yin
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Xiaofei Hu
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Yaning Sun
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Yunrui Xing
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Guangxu Xing
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Yanwei Wang
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Qingmei Li
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Yao Wang
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China
| | - Ruiguang Deng
- Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Gaiping Zhang
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China; College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China.
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Na G, Hu X, Sun Y, Xing G, Xing Y, Zhang G. A novel gold particle-based paper sensor for sensitively detecting carprofen in bovine muscle. FOOD AGR IMMUNOL 2020. [DOI: 10.1080/09540105.2020.1740178] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Guanqiong Na
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People’s Republic of China
- School of Food Science and Technology, Jiangnan University, Wuxi, People’s Republic of China
| | - Xiaofei Hu
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People’s Republic of China
| | - Yaning Sun
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People’s Republic of China
| | - Guangxu Xing
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People’s Republic of China
| | - Yunrui Xing
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People’s Republic of China
| | - Gaiping Zhang
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People’s Republic of China
- School of Food Science and Technology, Jiangnan University, Wuxi, People’s Republic of China
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, People’s Republic of China
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31
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Li R, Qiao S, Chen XX, Xing G, Li X, Zhang G. Vesicular stomatitis virus glycoprotein suppresses nuclear factor kappa-B- and mitogen-activated protein kinase-mediated pro-inflammatory responses dependent on sialic acids. Int J Biol Macromol 2020; 152:828-833. [PMID: 32126199 DOI: 10.1016/j.ijbiomac.2020.02.322] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 02/25/2020] [Accepted: 02/28/2020] [Indexed: 01/12/2023]
Abstract
Vesicular stomatitis (VS), characterized by vesicular lesions, produces significant economic losses in livestock industry. Infection by its causative agent, VS virus (VSV), has been previously shown to be mediated by the glycoprotein (G) during attachment, endocytosis and membrane fusion. In the current study, we revealed a novel role of VSV G protein in negative regulation of host cell pro-inflammatory responses. We determined that VSV G protein inhibited lipopolysaccharide (LPS)-induced pro-inflammatory responses as naïve VSV virions in murine peritoneal macrophage-like cell line RAW 264.7. Furthermore, we identified that VSV G protein suppressed nuclear factor kappa-B (NF-κB) and mitogen-activated protein kinase (MAPK)-mediated pro-inflammatory pathways in a dose-dependent manner. Moreover, we demonstrated that α2-3-linked sialic acids on VSV G protein were involved in antagonizing NF-κB- and MAPK-mediated pro-inflammatory responses. All these results expand the knowledge of VSV pathogenesis and strengthen the importance of VSV G protein in host innate immunity, which support implications for the development of VSV-based vaccination and oncolysis.
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Affiliation(s)
- Rui Li
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, Henan, China
| | - Songlin Qiao
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, Henan, China
| | - Xin-Xin Chen
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, Henan, China
| | - Guangxu Xing
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, Henan, China
| | - Xuewu Li
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, Henan, China
| | - Gaiping Zhang
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, Henan, China; College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, Henan, China; Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, Jiangsu, China.
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Zheng G, Lu Q, Wang F, Xing G, Feng H, Jin Q, Guo Z, Teng M, Hao H, Li D, Wei X, Zhang Y, Deng R, Zhang G. Phylogenetic analysis of porcine circovirus type 2 (PCV2) between 2015 and 2018 in Henan Province, China. BMC Vet Res 2020; 16:6. [PMID: 31910824 PMCID: PMC6947828 DOI: 10.1186/s12917-019-2193-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 11/25/2019] [Indexed: 12/16/2022] Open
Abstract
Background Porcine circovirus type 2 (PCV2) is the pathogen of porcine circovirus associated diseases (PCVAD) and one of the main pathogens in the global pig industry, which has brought huge economic losses to the pig industry. In recent years, there has been limited research on the prevalence of PCV2 in Henan Province. This study investigated the genotype and evolution of PCV2 in this area. Results We collected 117 clinical samples from different regions of Henan Province from 2015 to 2018. Here, we found that the PCV2 infection rate of PCV2 was 62.4%. Thirty-seven positive clinical samples were selected to amplify the complete genome of PCV2 and were sequenced. Based on the phylogenetic analysis of PCV2 ORF2 and complete genome, it was found that the 37 newly detected strains belonged to PCV2a (3 of 37), PCV2b (21 of 37) and PCV2d (13 of 37), indicating the predominant prevalence of PCV2b and PCV2d strains. In addition, we compared the amino acid sequences and found several amino acid mutation sites among different genotypes. Furthermore, the results of selective pressure analysis showed that there were 5 positive selection sites. Conclusions This study indicated the genetic diversity, molecular epidemiology and evolution of PCV2 genotypes in Henan Province during 2015–2018.
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Affiliation(s)
- Guanmin Zheng
- College of Animal Husbandry and Veterinary Science, Henan Agricultural University, Zhengzhou, 450002, China.,Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China
| | - Qingxia Lu
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China
| | - Fangyu Wang
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China
| | - Guangxu Xing
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China
| | - Hua Feng
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China
| | - Qianyue Jin
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China
| | - Zhenhua Guo
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China
| | - Man Teng
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China
| | - Huifang Hao
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China
| | - Dongliang Li
- College of Animal Husbandry and Veterinary Science, Henan Agricultural University, Zhengzhou, 450002, China.,Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China
| | - Xin Wei
- College of Animal Husbandry and Veterinary Science, Henan Agricultural University, Zhengzhou, 450002, China.,Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China
| | - Yuhang Zhang
- College of Animal Husbandry and Veterinary Science, Henan Agricultural University, Zhengzhou, 450002, China.,Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China
| | - Ruiguang Deng
- Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China
| | - Gaiping Zhang
- College of Animal Husbandry and Veterinary Science, Henan Agricultural University, Zhengzhou, 450002, China. .,Key Laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Huayuan Road No. 116, Zhengzhou, 450002, China. .,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009, Jiangsu, China.
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Yin M, Hu X, Sun Y, Xing Y, Chai S, Xing G, Yang Y, Teng M, Li Q, Wang Y, Deng R, Zhang G. The broad-spectrum and ultra-sensitive detection of zeranol and its analogues by an enzyme-linked immunosorbent assay in cattle origin samples. RSC Adv 2020; 10:20809-20816. [PMID: 35517725 PMCID: PMC9054319 DOI: 10.1039/d0ra02936j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 05/11/2020] [Indexed: 11/21/2022] Open
Abstract
Zeranol (α-zearalanol) has been used as a growth promoter in livestock since 1969 in some non-EU countries; the residues of zeranol and its five analogues in animal origin foods may endanger human health due to their strong estrogenic and anabolic activities. Therefore, it is urgent to establish simple, rapid, real-time, broad-spectrum and high-sensitivity detection methods for the residues of zeranol and its analogues. In this study, an ultrasensitive indirect-competition enzyme-linked immunosorbent assay (ic-ELISA) was established for the rapid multi-residue detection of zeranol and its five analogues in cattle origin samples, which was based on a broad-spectrum monoclonal antibody (mAb) that specifically bound to zeranol and its analogues with high sensitivity. The half maximal inhibitory concentration (IC50) values for zeranol, β-zearalanol, zearalanone, α-zearalenol, β-zearalenol, and zearalenone were 0.103, 0.080, 0.161, 0.177, 0.254, and 0.194 ng mL−1, respectively, the recovery rates of cattle origin samples spiked with zeranol ranged from 79.2–104.2%, and the coefficient of variation (CV) values were less than 11.4%. Excellent correlation (R2 = 0.9845) was obtained between the results of HPLC-MS/MS and ic-ELISA. In conclusion, the developed ic-ELISA could be employed as an ultrasensitive and broad-spectrum detection method for monitoring trace ZEN residues in cattle origin foods. This paper presents a broad-spectrum and ultra-sensitive ic-ELISA method for the rapid detection of zeranol and its analogues in cattle origin samples.![]()
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Hao J, Wang F, Xing G, Liu Y, Deng R, Zhang H, Cheng A, Zhang G. Design and preliminary application of affinity peptide based on the structure of the porcine circovirus type II Capsid (PCV2 Cap). PeerJ 2019; 7:e8132. [PMID: 31824765 PMCID: PMC6899342 DOI: 10.7717/peerj.8132] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 10/31/2019] [Indexed: 01/14/2023] Open
Abstract
Background Affinity peptides, as a core part of affinity chromatography, play an important role in the purification of target molecules. Methods Here we describe the use of molecular docking technology for virtual screening of affinity peptides that specifically recognize the PCV2 Cap protein for the first time. Thirteen candidate peptides with high scores were obtained and then further characterized. Experimentally, the affinity and sensitivity of the peptides studied were identified by ELISA and LSPR, respectively. In order to investigate the purification effect of a selected peptide (L11) for the recombinant PCV2 Cap protein, it was coupled to NHS agarose magnetic beads as an affinity adsorbent (NaMB-L11); and the ligand density of the affinity adsorbent and pH value in the purification of the recombinant PCV2 Cap protein were optimized. Results Our data showed that the peptide L11- DYWWQSWE has the smallest KD = 103 nM with higher specificity for PCV2 Cap protein recognition. The NaMB-L11 affinity adsorbent yielded a purified Cap sample with 98% purity at 90% recovery in a single step. Conclusion Based on the structure, we obtained a high affinity peptide L11 binding to the PCV2 Cap protein by molecular docking technology. It not only provides a theoretical basis for the design of PCV2 Cap affinity peptide, but a new method for the purification of the PCV2 Cap protein.
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Affiliation(s)
- Junfang Hao
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Fangyu Wang
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Guangxu Xing
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Yunchao Liu
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Ruiguang Deng
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Hao Zhang
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China.,College of Life Science, Henan Agricultural University, Zhengzhou, China
| | - Anchun Cheng
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Gaiping Zhang
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China.,College of Life Science, Henan Agricultural University, Zhengzhou, China
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Liu C, Li D, Xing G, Chen L, Lin M, Ling Q. Synthesis and Properties of Main-Chain Phosphorescent Polymer with Iridium Complex. RUSS J GEN CHEM+ 2019. [DOI: 10.1134/s1070363219120284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ding P, Jin Q, Chen X, Yang S, Guo J, Xing G, Deng R, Wang A, Zhang G. Nanovaccine Confers Dual Protection Against Influenza A Virus And Porcine Circovirus Type 2. Int J Nanomedicine 2019; 14:7533-7548. [PMID: 31571862 PMCID: PMC6754344 DOI: 10.2147/ijn.s218057] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 09/02/2019] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND The influenza A virus (IAV) is known for its high variability and poses a huge threat to the health of humans and animals. Pigs play a central role in the cross-species reassortment of IAV. Ectodomain of matrix protein 2 (M2e) is the most conserved protective antigen in IAV and can be used to develop nanovaccines through nanoparticles displaying to increase its immunogenicity. However, the high immunogenicity of nanoparticles can cause the risk of off-target immune response, and excess unwanted antibodies may interfere with the protective efficacy of M2e-specific antibodies. Therefore, it is necessary to select reasonable nanoparticles to make full use of antibodies against nanoparticles while increasing the level of M2e-specific antibodies. Porcine circovirus type 2 (PCV2) is the most susceptible virus in pigs and can promote IAV infection. It is meaningful to develop a vaccine that can simultaneously control swine influenza virus (SIV) and PCV2. METHODS In the present study, M2e of different copy numbers were inserted into the capsid (Cap) protein of PCV2 and expressed in Escherichia coli to form self-assembled chimeric virus-like particles (VLPs) nanovaccine. BALB/c mice and pigs were immunized with these nanovaccines to explore optimal anti-IAV and anti-PCV2 immunity. RESULTS Cap is capable of carrying at least 81 amino acid residues (three copies of M2e) at its C-terminal without impairing VLPs formation. Cap-3M2e VLPs induced the highest levels of M2e-specific immune responses, conferring protection against lethal challenge of IAVs from different species and induced specific immune responses consistent with PCV2 commercial vaccines in mice. In addition, Cap-3M2e VLPs induced high levels of M2e-specific antibodies and PCV2-specific neutralizing antibodies in pigs. CONCLUSION Cap-3M2e VLP is an economical and promising bivalent nanovaccine, which provides dual protection against IAV and PCV2.
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Affiliation(s)
- Peiyang Ding
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou450002, People’s Republic of China
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou450002, People’s Republic of China
| | - Qianyue Jin
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou450002, People’s Republic of China
- School of Life Sciences, Zhengzhou University, Zhengzhou450001, People’s Republic of China
| | - Xinxin Chen
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou450002, People’s Republic of China
| | - Suzhen Yang
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou450002, People’s Republic of China
| | - Junqing Guo
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou450002, People’s Republic of China
| | - Guangxu Xing
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou450002, People’s Republic of China
| | - Ruiguang Deng
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou450002, People’s Republic of China
| | - Aiping Wang
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou225009, People’s Republic of China
| | - Gaiping Zhang
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou450002, People’s Republic of China
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou450002, People’s Republic of China
- School of Life Sciences, Zhengzhou University, Zhengzhou450001, People’s Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou225009, People’s Republic of China
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Song Y, Wei Q, Liu Y, Bai Y, Deng R, Xing G, Zhang G. Development of novel subunit vaccine based on truncated fiber protein of egg drop syndrome virus and its immunogenicity in chickens. Virus Res 2019; 272:197728. [PMID: 31442468 DOI: 10.1016/j.virusres.2019.197728] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 08/07/2019] [Accepted: 08/19/2019] [Indexed: 10/26/2022]
Abstract
Egg-drop syndrome virus (EDSV) is an avian adenovirus that causes markedly decrease in egg production and in the quality of the eggs when it infects chickens. In this report, we engineered truncated fiber protein containing the entire knob domain and part of the shaft region as a vaccine candidate. The protein was obtained in the soluble fraction in Escherichia coli (E. coli), and expression level after nickel-affinity purification was 126 mg/L. By means of multiple characterization methods, it is demonstrated that the recombinant protein retains the native trimeric structure. A single inoculation with the structure-stabilized recombinant protein, even at the lowest dose of 2 μg, stimulated hemagglutination inhibition (HI) antibody responses in chickens, for at least 16 weeks. Neutralizing titers in sera from the protein immunized groups was similar to that of inactivated vaccine immunized group. The lymphocyte proliferation response and cytokine secretion were also induced in immunized SPF chickens. In addition, immunization with the fiber protein also significantly reduced the viral load in the liver. Taken together, these results suggest the truncated fiber protein as an effective single dose, long lasting and rapidly effective vaccine to protect against EDSV.
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Affiliation(s)
- Yapeng Song
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China; College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, China
| | - Qiang Wei
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Yunchao Liu
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Yilin Bai
- College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, China
| | - Ruiguang Deng
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Guangxu Xing
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China
| | - Gaiping Zhang
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China; College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu Province, 225009, China.
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Song Y, Wei Q, Liu Y, Feng H, Chen Y, Wang Y, Bai Y, Xing G, Deng R, Zhang G. Unravelling the receptor binding property of egg drop syndrome virus (EDSV) from the crystal structure of EDSV fiber head. Int J Biol Macromol 2019; 139:587-595. [PMID: 31381914 DOI: 10.1016/j.ijbiomac.2019.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Revised: 07/31/2019] [Accepted: 08/01/2019] [Indexed: 12/24/2022]
Abstract
Egg drop syndrome virus (EDSV) is an avian adenovirus that causes markedly decrease in egg production, and in the quality of the eggs when it infects chickens. Until now, EDSV virus-cell interactions are poorly understood, and the cellular receptor is still unknown. In the present study, we determined the atomic structure of the fiber head of EDSV (residues 377-644) at 2.74 Å resolution. Structure comparison with the (chick embryo lethal orphan) CELO long fiber head and human adenovirus fiber heads reveals that the avian adenovirus may interact with the same attachment factor in a unique fashion. Based on the previous studies of CELO virus, we assumed that the chicken coxsackievirus and adenovirus receptor (CAR) may be the attachment factor. We then demonstrate that the chicken CAR serves as a cellular attachment factor for EDSV based on three lines of evidences. Taken together, the results presented here are helpful for further exploring the pathogenesis related to the interaction between EDSV and host cells, and may be used for vaccine development and intervention strategies against EDSV infection.
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Affiliation(s)
- Yapeng Song
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China; Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Qiang Wei
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Yunchao Liu
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Hua Feng
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Yumei Chen
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Yanwei Wang
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Yilin Bai
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China
| | - Guangxu Xing
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Ruiguang Deng
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Gaiping Zhang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China; Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu Province 225009, China.
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Hu M, Wang Y, Yang J, Sun Y, Xing G, Deng R, Hu X, Zhang G. Competitive electrochemical immunosensor for maduramicin detection by multiple signal amplification strategy via hemin@Fe-MIL-88NH 2/AuPt. Biosens Bioelectron 2019; 142:111554. [PMID: 31382098 DOI: 10.1016/j.bios.2019.111554] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 07/23/2019] [Accepted: 07/29/2019] [Indexed: 02/06/2023]
Abstract
Maduramicin (MD) is a type of monoglycoside polyether ionophore antibiotic that can effectively treat coccidiosis and facilitate animal growth. However, its extensive and excessive use brings potential risk to human health. Herein, an electrochemical immunosensor based on indirect competitive format was fabricated for analysis of MD residue in eggs by a multiple signal amplification system. Initially, Au nanoparticles were deposited onto glassy carbon electrode surface to load the coating antigen MD-BSA and to improve conductivity. Then the signal amplification platform was constructed by encapsulating hemin into Fe-MIL-88 NH2 metal-organic frameworks (hemin@MOFs), and then the obtained composites were decorated with AuPt nanoparticles. The synthesized hemin@MOFs/AuPt was not only used as a signal amplification mediator, but also utilized as a carrier for immobilization of horseradish peroxidase-conjugated affinipure goat anti-mouse antibody (Ab2-HRP) and horseradish peroxidase (HRP). The constructed hemin@MOFs/AuPt-Ab2-HRP bioconjugates could effectively amplify the current signal since hemin@MOFs, AuPt and HRP all exhibited high catalytic activity towards the hydrogen peroxide. Moreover, the established immunosensor showed high sensitivity and stability during the detection procedure. With the synergistic catalytic effect of hemin@MOFs, AuPt and HRP, a wide detection range of 0.1-50 ng mL-1 and a low detection limit of 0.045 ng mL-1 were achieved (S/N = 3), respectively. Ultimately, the developed method displayed excellent performance in practical applications, providing a promising probability to detect other veterinary drug residues to guarantee food safety.
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Affiliation(s)
- Mei Hu
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China; Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Science, Zhengzhou, 450002, China
| | - Yao Wang
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Jifei Yang
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Science, Zhengzhou, 450002, China
| | - Yaning Sun
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Science, Zhengzhou, 450002, China
| | - Guangxu Xing
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Science, Zhengzhou, 450002, China
| | - Ruiguang Deng
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Science, Zhengzhou, 450002, China
| | - Xiaofei Hu
- Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Science, Zhengzhou, 450002, China.
| | - Gaiping Zhang
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China; Key Laboratory for Animal Immunology of the Ministry of Agriculture, Henan Academy of Agricultural Science, Zhengzhou, 450002, China; Henan Agricultural University, Zhengzhou, 450002, China.
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Sun A, Luo J, Wan B, Du Y, Wang X, Weng H, Cao X, Zhang T, Chai S, Zhao D, Xing G, Zhuang G, Zhang G. Lorf9 deletion significantly eliminated lymphoid organ atrophy induced by meq-deleted very virulent Marek's disease virus. Vet Microbiol 2019; 235:164-169. [PMID: 31282374 DOI: 10.1016/j.vetmic.2019.06.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 06/26/2019] [Accepted: 06/30/2019] [Indexed: 10/26/2022]
Abstract
Marek's disease virus (MDV) is a highly contagious alphaherpesvirus that causes rapid onset of T cell lymphomas in chickens. MDV continues to break through vaccinal immunity due to the emergence of highly virulent field strains. Earlier studies revealed that deletion of the meq gene from MDV results in attenuated vaccines that protect against disease when chickens are infected with highly virulent strains. However, meq-deleted viruses still retain the ability to induce lymphoid organ atrophy, which raises safety concerns. In an earlier study, we found that deletion of lorf9 counteracts this lymphoid organ atrophy. Here, we describe the generation of a double deletion mutant virus lacking virus-encoded meq and lorf9. In vitro studies revealed that during replication, the mutant virus had kinetic characteristics similar to the parental virus; however, in vivo the replication capability was significantly reduced. Results of animal studies revealed no obvious MDV-specific symptoms and lesions. Importantly, the double deletion mutant virus lost the capacity to induce lymphoid organ atrophy, which has been the main obstacle during development of a good vaccine candidate.
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Affiliation(s)
- Aijun Sun
- College of Animal Sciences and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, Henan, PR China
| | - Jun Luo
- Key laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, Henan, PR China
| | - Bo Wan
- College of Animal Sciences and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, Henan, PR China
| | - Yongkun Du
- College of Animal Sciences and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, Henan, PR China
| | - Xiangru Wang
- College of Animal Sciences and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, Henan, PR China
| | - Haoyu Weng
- College of Animal Sciences and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, Henan, PR China
| | - Xinru Cao
- College of Animal Sciences and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, Henan, PR China
| | - Tianlu Zhang
- College of Animal Sciences and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, Henan, PR China
| | - Shujun Chai
- Key laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, Henan, PR China
| | - Dong Zhao
- Key laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, Henan, PR China
| | - Guangxu Xing
- Key laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, Henan, PR China
| | - Guoqing Zhuang
- College of Animal Sciences and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, Henan, PR China.
| | - Gaiping Zhang
- College of Animal Sciences and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, Henan, PR China; Key laboratory of Animal Immunology of the Ministry of Agriculture, Henan Provincial Key laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, Henan, PR China.
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Awan F, Chan R, Gu L, Xing G, Bhargava P, Ruzicka B, Dreyling M, Zinzani P, Gopal A. TREATMENT EMERGENT ADVERSE EVENTS VARY WITH DIFFERENT PI3K INHIBITORS. Hematol Oncol 2019. [DOI: 10.1002/hon.208_2631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- F.T. Awan
- Harold C. Simmons Comprehensive Cancer Center; University of Texas Southwestern Medical Center; Dallas United States
| | - R.J. Chan
- Medical Affairs; Gilead Sciences, Inc.; Foster City United States
| | - L. Gu
- Biostatistics; Gilead Sciences, Inc.; Seattle United States
| | - G. Xing
- Biostatistics; Gilead Sciences, Inc.; Seattle United States
| | - P. Bhargava
- Medical Affairs; Gilead Sciences, Inc.; Foster City United States
| | - B. Ruzicka
- Medical Affairs; Gilead Sciences, Inc.; Foster City United States
| | - M. Dreyling
- Department of Medicine III; University Hospital of the Ludwig Maximilians University Munich; München Germany
| | - P. Zinzani
- Institute of Hematology “L. e A. Seràgnoli”; University of Bologna; Bologna Italy
| | - A.K. Gopal
- Fred Hutchinson Cancer Research Center; Seattle Cancer Care Alliance, University of Washington; Seattle United States
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Brown J, Chan R, Xing G, Bhargava P, Ruzicka B, O'Brien S. IDELALISIB PLUS ANTI-CD20 USED SECOND LINE SHOWS IMPROVED PFS AND COMPARABLE SAFETY COMPARED TO LATER LINE THERAPY OF RELAPSED CLL. Hematol Oncol 2019. [DOI: 10.1002/hon.55_2631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- J.R. Brown
- Department of Medical Oncology; Dana-Farber Cancer Institute; Newton United States
| | - R.J. Chan
- Medical Affairs; Gilead Sciences, Inc.; Foster City United States
| | - G. Xing
- Biostatistics; Gilead Sciences, Inc.; Seattle United States
| | - P. Bhargava
- Medical Affairs; Gilead Sciences, Inc.; Foster City United States
| | - B. Ruzicka
- Medical Affairs; Gilead Sciences, Inc.; Foster City United States
| | - S.M. O'Brien
- Chao Family Comprehensive Cancer Center; University of California Irvine Medical Center; Orange United States
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Yu Q, Wang F, Hu X, Xing G, Deng R, Guo J, Cheng A, Wang J, Hao J, Zhao D, Teng M, Zhang G. Comparison of two docking methods for peptide-protein interactions. J Sci Food Agric 2018; 98:3722-3727. [PMID: 29315602 DOI: 10.1002/jsfa.8880] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 08/15/2017] [Accepted: 12/30/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND The importance of peptides in regulatory interactions has caused peptide-protein docking to attract the attention of many researchers. A variety of methods for molecular modeling of peptide-protein docking, such as local search and global search, are currently used. RESULTS The interactions of 11 peptides and CSFV E2 protein were evaluated by the GalaxyPepDock and FlexX/ SYBYL programs, respectively. The assessment scores of all the peptides were correlated with their KD values. The final results showed that a moderate correlation coefficient was represented between KD values and CScores of predicted models by FlexX/ SYBYL. CONCLUSION Our results demonstrate that considering the flexibility of the peptide is better than searching for more potential binding sites on the target protein surface while performing peptide-protein molecular docking. These data provide reasonable evidence for the molecular design of peptides and guidance for the functional assignment of target proteins. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Qiuying Yu
- Avian Diseases Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Fangyu Wang
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Xiaofei Hu
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Guangxu Xing
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Ruiguang Deng
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Junqing Guo
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Anchun Cheng
- Avian Diseases Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Jing Wang
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Junfang Hao
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Dong Zhao
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Man Teng
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Gaiping Zhang
- Avian Diseases Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Henan Key Laboratory for Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, China
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, People's Republic of China
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Su Y, Liu Y, Chen Y, Xing G, Hao H, Wei Q, Liang Y, Xie W, Li D, Huang H, Deng R, Zhang G. A novel duplex TaqMan probe-based real-time RT-qPCR for detecting and differentiating classical and variant porcine epidemic diarrhea viruses. Mol Cell Probes 2017; 37:6-11. [PMID: 29104088 DOI: 10.1016/j.mcp.2017.10.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 10/11/2017] [Accepted: 10/30/2017] [Indexed: 02/01/2023]
Abstract
Two different genotypes of porcine epidemic diarrhea virus (PEDV), the classical and variant strains, are classified by multiple insertions and deletions in their S genes. It is critical to detect and differentiate two genotypes in the pork industry to prevent PEDV outbreaks. In the present study, a novel duplex TaqMan RT-PCR was developed for detecting and differentiating PEDV strains in China. There was no cross-amplification between the two probes when using standard recombinant plasmids, and the specificity was further confirmed by using other seven non-PEDV swine pathogens. The minimum copies required for the detection of both classical and variant PEDV were 4.8 × 102 DNA copies/reaction. The repeatability of TaqMan RT-PCR was evaluated using standard recombinant plasmids and gave coefficients of variation 0.19-4.93. In recent 5 years, 79 clinical samples were collected from piglets with severe diarrhea in the Central China. Among these clinical samples, 51 were confirmed as PEDV positive by conventional RT-PCR, whereas 63 variant PEDV, 3 co-infections and 1 classical PEDV were confirmed by this duplex TaqMan RT-PCR, with viral loads of 102-108, 102-103, and 104 copies/reaction, respectively. Therefore, the duplex TaqMan RT-PCR could be a useful method for detecting and differentiating variant and classical PEDV strains. The results showed that variant PEDV was prevalent in clinical samples in central China. Moreover, in this study, co-infection by PEDV strains was detected for the first time and might help explain the emergence of the novel recombinant PEDV in recent years.
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Affiliation(s)
- Yunfang Su
- College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Yunchao Liu
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450000, China
| | - Yumei Chen
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450000, China
| | - Guangxu Xing
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450000, China
| | - Huifang Hao
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450000, China
| | - Qiang Wei
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450000, China
| | - Yue Liang
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450000, China
| | - Weitao Xie
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450000, China
| | - Dongliang Li
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450000, China
| | - Huimin Huang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450000, China
| | - Ruiguang Deng
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450000, China
| | - Gaiping Zhang
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, 450000, China; College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450000, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225000, China.
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Yao J, Xing G, Han J, Sun Y, Wang F, Deng R, Hu X, Zhang G. Novel fluoroimmunoassays for detecting ochratoxin A using CdTe quantum dots. J Biophotonics 2017; 10:657-663. [PMID: 27243787 DOI: 10.1002/jbio.201600005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Revised: 04/21/2016] [Accepted: 05/08/2016] [Indexed: 06/05/2023]
Abstract
Novel direct and indirect competitive fluorescence-linked immunosorbent assays (cFLISA and icFLISA) for detection of ochratoxin A (OTA) were described using CdTe quantum dots (QDs) as fluorescent label. CdTe QDs were successfully synthesized, which had an emission wavelength of 615 nm. The high purity monoclonal antibody against OTA was prepared through cell thawing and the octylic acid-ammonium sulfate method. The OTA MAbs were successfully coupled with CdTe QDs, and which also retained the original biological activity. The 50% inhibition values (IC50 ) of the cFLISA and icFLISA were 0.630 ng/mL, 0.234 ng/mL, the limits of detection (LOD) were 7.06 × 10-3 and 4.15 × 10-3 ng/mL, and detection ranges were 7.06 × 10-3 - 18.34 ng/mL and 4.15 × 10-3 - 4.88 ng/mL, in-order. The recoveries were 96.0-104.7% along with coefficients of variation (CVs) below 10%. The FLISA provided novel method for determination of OTA and the potential of MAb-CdTe QDs for the establishment of fluorescent immunochromatographic test strip.
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Affiliation(s)
- Jingjing Yao
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
| | - Guangxu Xing
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
| | - Junling Han
- The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453100, China
| | - Yaning Sun
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
| | - Fangyu Wang
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
| | - Ruiguang Deng
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
| | - Xiaofei Hu
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
| | - Gaiping Zhang
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
- Henan Agricultural University, Zhengzhou, 450002, China
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Zhang Y, Yan X, Zhao T, Xu Q, Peng Q, Hu R, Quan S, Zhou Y, Xing G. Targeting C3a/C5a receptors inhibits human mesangial cell proliferation and alleviates immunoglobulin A nephropathy in mice. Clin Exp Immunol 2017; 189:60-70. [PMID: 28295247 DOI: 10.1111/cei.12961] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/28/2017] [Indexed: 11/27/2022] Open
Abstract
Complement activation has a deep pathogenic influence in immunoglobulin (Ig)A nephropathy (IgAN). C3a and C5a, small cleavage fragments generated by complement activation, are key mediators of inflammation. The fragments exert broad proinflammatory effects by binding to specific receptors (C3aR and C5aR, respectively). However, no studies thus far have investigated the effects of C3a, C5a and their receptors on IgAN. We observed that C3aR and C5aR antagonists repressed IgA-induced cell proliferation and interleukin (IL)-6 and monocyte chemotactic protein 1 (MCP-1) production in cultured human mesangial cells (HMCs). Furthermore, an IgAN mouse model induced by Sendai virus infection was employed to investigate the effects of C3aR and C5aR on IgAN in vivo for the first time. Wild-type (WT) and several knock-out mouse strains (C3aR-/- or C5aR-/- ) were immunized intranasally with increasing doses of inactivated virus for 14 weeks and were subjected to two intravenous viral challenges during the time-period indicated. In the Sendai virus-induced IgAN model, C3aR/C5aR-deficient mice had significantly reduced proteinuria, lower renal IgA and C3 deposition, less histological damage and reduced mesangial proliferation compared with WT mice. Both C3aR deficiency and C5aR deficiency, especially C3aR deficiency, inhibited renal tumour necrosis factor (TNF)-α, transforming growth factor (TGF)-β, IL-1β, IL-6 and MCP-1 expression significantly. However, C3aR/C5aR-deficient and WT mice with IgAN did not differ with respect to their blood urea nitrogen (BUN) and serum creatinine levels. Our findings provide further support for the idea that C3aR and C5aR are crucially important in IgAN, and suggest that pharmaceutically targeting C3aR/C5aR may hold promise for the treatment of IgAN.
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Affiliation(s)
- Y Zhang
- Department of Nephrology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - X Yan
- Department of Nephrology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - T Zhao
- Department of Nephrology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Q Xu
- Medical Research Council Centre for Transplantation, King's College London, London, UK
| | - Q Peng
- Medical Research Council Centre for Transplantation, King's College London, London, UK
| | - R Hu
- Department of Nephrology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - S Quan
- Department of Nephrology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Y Zhou
- Department of Nephrology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - G Xing
- Department of Nephrology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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Teng S, Guo Z, Peng H, Xing G, Chen H, He B, McClure M, Mu Q. High-frequency repetitive transcranial magnetic stimulation over the left DLPFC for major depression: Session-dependent efficacy: A meta-analysis. Eur Psychiatry 2017; 41:75-84. [DOI: 10.1016/j.eurpsy.2016.11.002] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 11/02/2016] [Accepted: 11/02/2016] [Indexed: 01/18/2023] Open
Abstract
AbstractBackgroundDepression is a major debilitating psychiatric disorder. Current antidepressant drugs are often associated with side effects or treatment resistance. The aim of this meta-analysis was to evaluate therapeutic effects of high-frequency repetitive transcranial magnetic stimulation (HF-rTMS) in major depression (MD).MethodsThe medical data bases of PubMed, Medline, Embase and Cochrane Central Register were searched for randomized controlled trials (RCTs) reporting the therapeutic effects of high-frequency rTMS for depression, which were published in English between January 1990 and June 2016. The index terms were “depress*”, “depression” and “transcranial magnetic stimulation”. Depression outcome data of different sessions (5, 10, 15, and 20 sessions of rTMS treatment) were extracted and synthesized by calculating standardized mean difference (SMD) with 95% confidence intervals (CI) by using a random-effect model. Within each session group, the subgroup analyses based on the number of pulses (≤ 1000, 1200–1500, 1600–1800, and 2000–3000) were also conducted.ResultsThirty RCTs with a total of 1754 subjects including 1136 in the rTMS group and 618 in the sham group were included in this meta-analysis. rTMS had a significant overall therapeutic effect on depression severity scores (SMD = −0.73, P < 0.00001). The five, 10, 15, 20 sessions of rTMS treatments yielded the significant mean effect sizes of −0.43, −0.60, −1.13, and −2.74, respectively. In the four groups (5, 10, 15, 20 sessions), the maximal mean effect size was all obtained in the subgroup of 1200–1500 pulses per day (−0.97, −1.14, −1.91, −5.47; P < 0.05).ConclusionsThe increasing of HF-rTMS sessions is associated with the increased efficacy of HF-rTMS in reducing depressed patients’ symptom severity. A total number of pulses of 1200–1500 per day appear to deliver the best antidepressant effects of HF-rTMS.
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Li X, Li B, Xing G, Meng L. Effects of soybean resistance on variability in life history traits of the higher trophic level parasitoid Meteorus pulchricornis (Hymenoptera: Braconidae). Bull Entomol Res 2017; 107:1-8. [PMID: 27809940 DOI: 10.1017/s0007485316000407] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
To extrapolate the influence of plant cultivars varying in resistance levels to hosts on parasitoid life history traits, we estimated variation in parasitoid developmental and reproductive performances as a function of resistance in soybean cultivars, which were randomly chosen from a line of resistant genotypes. Our study showed that the parasitoid Meteorus pulchricornis varied widely in offspring survival and lifetime fecundity, but varied slightly in development time and adult body size, in response to the soybean cultivars that varied in resistance to the host Spodoptera litura. Furthermore, the variability in survival and lifetime fecundity was different between attacking the 2nd and the 4th instar host larvae, varying more in survival but less in lifetime fecundity when attacking the 4th than 2nd instar larvae. Our study provides further evidence supporting that plant resistance to herbivorous hosts have variable effects on different life history traits of higher trophic level parasitoids.
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Affiliation(s)
- X Li
- School of Plant Protection, Nanjing Agricultural University,No. 1 Weigang Rd, Nanjing, Jiangsu 210095,P.R. China
| | - B Li
- School of Plant Protection, Nanjing Agricultural University,No. 1 Weigang Rd, Nanjing, Jiangsu 210095,P.R. China
| | - G Xing
- National Center of Soybean Improvement, Nanjing Agricultural University,No. 1 Weigang Rd, Nanjing, Jiangsu 210095,P.R. China
| | - L Meng
- School of Plant Protection, Nanjing Agricultural University,No. 1 Weigang Rd, Nanjing, Jiangsu 210095,P.R. China
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Haber H, Xing G, Walker C. 21: Prenatal infections and risk of autism, intellectual disability and/or epilepsy. Am J Obstet Gynecol 2016. [DOI: 10.1016/j.ajog.2016.09.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Su Y, Liu Y, Chen Y, Zhao B, Ji P, Xing G, Jiang D, Liu C, Song Y, Wang G, Li D, Deng R, Zhang G. Detection and phylogenetic analysis of porcine epidemic diarrhea virus in central China based on the ORF3 gene and the S1 gene. Virol J 2016; 13:192. [PMID: 27887624 PMCID: PMC5123408 DOI: 10.1186/s12985-016-0646-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 11/10/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Porcine epidemic diarrhea (PED) has increased in severity in China since 2010. To investigate further the infectivity, genetic diversity and molecular epidemiology of its causative agent, the porcine epidemic diarrhea virus (PEDV), we assessed 129 clinical samples, which were the intestinal tissue of piglets with severe diarrhea, from 17 cities in central China. Both the spike (S) glycoprotein (S1, 1-789 amino acids (aa)) and the full-length ORF3 gene of 21 representative field strains from 21 farms in 11 cities were sequenced and analysed. METHODS PEDV was detected by reverse transcription-polymerase chain reaction (RT-PCR), and S1 and ORF3 sequences were processed by the Clustal W method via DNAMAN 8 software, and phylogenetic trees were constructed by the neighbor-joining method using MEGA 6 software. RESULTS The prevalence of PEDV was 92.25% and was detected in 119 of 129 samples, with 94.03% (63 of 67) of pig farms harbouring the disease. According to the phylogenetic analysis of the S1 genes, our isolates all fell into group G2 (variants) and showed a close relationship to isolates from Chinese (HN1303, CH/ZMDZY/11 and AJ1102), Korean (AD01), American (MN, IA1, IA2 and 13-019349) sources, and these isolates differed genetically from other Chinese (LZC, CH/HNZZ/2011 and SD-M) and Korean (SM98) strains as well Japanese (83-P5 and MK) strains. In addition, our isolates differed from attenuated vaccine strains, CV777 (used in China) and DR13 (used in Korea). According to our derived amino acid sequence analysis, we detected one novel variant PEDV, viz: CH/HNLY, with 4-aa insertion/deletion (RSSS/T) at position 375 and 1-aa (D) deletion at position 430 compared to the CV777 attenuated strain. These mutations were located on the receptor binding domain. Our ORF3 gene analyses showed that the prevalent PEDV isolates were variants, and the isolated strains differed genetically from the vaccine strains. CONCLUSIONS These findings illustrated the existence of genetic diversity among geographically distinct PEDV strains, and our study has provided an impetus to conduct further research on the PEDV receptor binding protein and on the new and efficacious vaccines design.
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Affiliation(s)
- Yunfang Su
- College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling, Shaanxi, 712100, China
| | - Yunchao Liu
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Science, Zhengzhou, 450002, China.
| | - Yumei Chen
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Science, Zhengzhou, 450002, China
| | - Baolei Zhao
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, China
| | - Pengchao Ji
- College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling, Shaanxi, 712100, China
| | - Guangxu Xing
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Science, Zhengzhou, 450002, China
| | - Dawei Jiang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, China
| | - Chang Liu
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Science, Zhengzhou, 450002, China
| | - Yapeng Song
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, China
| | - Guoqiang Wang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, China
| | - Dongliang Li
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, China
| | - Ruiguang Deng
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Science, Zhengzhou, 450002, China
| | - Gaiping Zhang
- Henan Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Science, Zhengzhou, 450002, China. .,College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450002, China. .,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, China.
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