Patient-derived monoclonal antibody neutralizes HCV infection in vitro and vivo without generating escape mutants.
In recent years, new direct-acting antivirals for hepatitis C virus (HCV) have been approved, but hepatitis C continues to pose a threat to human health. It is important to develop neutralizing anti-HCV antibodies to prevent medical and accidental infection, such as might occur via liver transplanta...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2022-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0274283 |
| _version_ | 1811208460498370560 |
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| author | Hiroshi Yokokawa Midori Shinohara Yuji Teraoka Michio Imamura Noriko Nakamura Noriyuki Watanabe Tomoko Date Hideki Aizaki Tomokatsu Iwamura Hideki Narumi Kazuaki Chayama Takaji Wakita |
| author_facet | Hiroshi Yokokawa Midori Shinohara Yuji Teraoka Michio Imamura Noriko Nakamura Noriyuki Watanabe Tomoko Date Hideki Aizaki Tomokatsu Iwamura Hideki Narumi Kazuaki Chayama Takaji Wakita |
| author_sort | Hiroshi Yokokawa |
| collection | DOAJ |
| description | In recent years, new direct-acting antivirals for hepatitis C virus (HCV) have been approved, but hepatitis C continues to pose a threat to human health. It is important to develop neutralizing anti-HCV antibodies to prevent medical and accidental infection, such as might occur via liver transplantation of chronic HCV patients and needle-stick accidents in the clinic. In this study, we sought to obtain anti-HCV antibodies using phage display screening. Phages displaying human hepatocellular carcinoma patient-derived antibodies were screened by 4 rounds of biopanning with genotype-1b and -2a HCV envelope E2 protein adsorbed to magnetic beads. The three antibodies obtained from this screen had reactivity against E2 proteins derived from both genotype-1b and -2a strains. However, in epitope analysis, these antibodies did not recognize linear peptides from an overlapping E2 epitope peptide library, and did not bind to denatured E2 protein. In addition, these antibodies showed cross-genotypic neutralizing activity against genotype-1a, -1b, -2a, and -3a cell culture-generated infectious HCV particles (HCVcc). Moreover, emergence of viral escape mutants was not observed after repeated rounds of passaging of HCV-infected cells in the presence of one such antibody, e2d066. Furthermore, injection of the e2d066 antibody into human hepatocyte-transplanted immunodeficient mice inhibited infection by J6/JFH-1 HCVcc. In conclusion, we identified conformational epitope-recognizing, cross-genotypic neutralizing antibodies using phage display screening. Notably, e2d066 antibody did not select for escape mutant emergence in vitro and demonstrated neutralizing activity in vivo. Our results suggested that these antibodies may serve as prophylactic and therapeutic agents. |
| first_indexed | 2024-04-12T04:21:45Z |
| format | Article |
| id | doaj.art-eb687d3a76cf48d9a935c8025f9c022f |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-04-12T04:21:45Z |
| publishDate | 2022-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-eb687d3a76cf48d9a935c8025f9c022f2022-12-22T03:48:13ZengPublic Library of Science (PLoS)PLoS ONE1932-62032022-01-01179e027428310.1371/journal.pone.0274283Patient-derived monoclonal antibody neutralizes HCV infection in vitro and vivo without generating escape mutants.Hiroshi YokokawaMidori ShinoharaYuji TeraokaMichio ImamuraNoriko NakamuraNoriyuki WatanabeTomoko DateHideki AizakiTomokatsu IwamuraHideki NarumiKazuaki ChayamaTakaji WakitaIn recent years, new direct-acting antivirals for hepatitis C virus (HCV) have been approved, but hepatitis C continues to pose a threat to human health. It is important to develop neutralizing anti-HCV antibodies to prevent medical and accidental infection, such as might occur via liver transplantation of chronic HCV patients and needle-stick accidents in the clinic. In this study, we sought to obtain anti-HCV antibodies using phage display screening. Phages displaying human hepatocellular carcinoma patient-derived antibodies were screened by 4 rounds of biopanning with genotype-1b and -2a HCV envelope E2 protein adsorbed to magnetic beads. The three antibodies obtained from this screen had reactivity against E2 proteins derived from both genotype-1b and -2a strains. However, in epitope analysis, these antibodies did not recognize linear peptides from an overlapping E2 epitope peptide library, and did not bind to denatured E2 protein. In addition, these antibodies showed cross-genotypic neutralizing activity against genotype-1a, -1b, -2a, and -3a cell culture-generated infectious HCV particles (HCVcc). Moreover, emergence of viral escape mutants was not observed after repeated rounds of passaging of HCV-infected cells in the presence of one such antibody, e2d066. Furthermore, injection of the e2d066 antibody into human hepatocyte-transplanted immunodeficient mice inhibited infection by J6/JFH-1 HCVcc. In conclusion, we identified conformational epitope-recognizing, cross-genotypic neutralizing antibodies using phage display screening. Notably, e2d066 antibody did not select for escape mutant emergence in vitro and demonstrated neutralizing activity in vivo. Our results suggested that these antibodies may serve as prophylactic and therapeutic agents.https://doi.org/10.1371/journal.pone.0274283 |
| spellingShingle | Hiroshi Yokokawa Midori Shinohara Yuji Teraoka Michio Imamura Noriko Nakamura Noriyuki Watanabe Tomoko Date Hideki Aizaki Tomokatsu Iwamura Hideki Narumi Kazuaki Chayama Takaji Wakita Patient-derived monoclonal antibody neutralizes HCV infection in vitro and vivo without generating escape mutants. PLoS ONE |
| title | Patient-derived monoclonal antibody neutralizes HCV infection in vitro and vivo without generating escape mutants. |
| title_full | Patient-derived monoclonal antibody neutralizes HCV infection in vitro and vivo without generating escape mutants. |
| title_fullStr | Patient-derived monoclonal antibody neutralizes HCV infection in vitro and vivo without generating escape mutants. |
| title_full_unstemmed | Patient-derived monoclonal antibody neutralizes HCV infection in vitro and vivo without generating escape mutants. |
| title_short | Patient-derived monoclonal antibody neutralizes HCV infection in vitro and vivo without generating escape mutants. |
| title_sort | patient derived monoclonal antibody neutralizes hcv infection in vitro and vivo without generating escape mutants |
| url | https://doi.org/10.1371/journal.pone.0274283 |
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