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10.3390/v13020303

http://scihub22266oqcxt.onion/10.3390/v13020303
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33671997!7919263!33671997
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suck abstract from ncbi


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pmid33671997      Viruses 2021 ; 13 (2): ä
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  • PEDV Infection Generates Conformation-Specific Antibodies That Can Be Effectively Detected by a Cell-Based ELISA #MMPMID33671997
  • Hsu WT; Chang CY; Tsai CH; Wei SC; Lo HR; Lamis RJS; Chang HW; Chao YC
  • Viruses 2021[Feb]; 13 (2): ä PMID33671997show ga
  • Porcine epidemic diarrhea virus (PEDV) is a coronavirus that causes serious and highly contagious enteric disease in swine worldwide. In this study, we constructed a recombinant baculovirus (S-Bac) expressing full-length spike protein of the virulent epidemic genotype 2b (G2b) PEDV strain for serological studies of infected pigs. We found that most spike-specific antibodies produced upon PEDV infection in pigs are conformation-specific and they could be detected on S-Bac-infected insect cells by immunofluorescent assay, but they were insensitive to Western blot analysis, the typical method for antiserum analysis. These results indicated that spike conformation is crucial for serum recognition. Since it is difficult to purify trimeric spike membrane protein for conventional enzyme-linked immunosorbent assay (ELISA), we used S-Bac to generate a novel cell-based ELISA for convenient PEDV detection. We analyzed 100 pig serum samples, and our cell-based ELISA exhibited a sensitivity of 100%, a specificity of 97%, and almost perfect agreement [Cohen's kappa coefficient value (kappa) = 0.98] with immunocytochemical staining results. Our cell-based ELISA rapidly presented antigen for proper detection of conformation-specific antibodies, making PEDV detection more convenient, and it will be useful for detecting many viral diseases in the future.
  • |*Enzyme-Linked Immunosorbent Assay[MESH]
  • |Animals[MESH]
  • |Antibodies, Viral/*blood[MESH]
  • |Antigens, Viral/*immunology[MESH]
  • |Baculoviridae/immunology[MESH]
  • |Chlorocebus aethiops[MESH]
  • |Coronavirus Infections/immunology/*veterinary[MESH]
  • |Porcine epidemic diarrhea virus/*immunology[MESH]
  • |Recombinant Proteins/immunology[MESH]
  • |Spike Glycoprotein, Coronavirus/*immunology[MESH]
  • |Spodoptera[MESH]
  • |Swine[MESH]
  • |Swine Diseases/immunology/virology[MESH]


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