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Chen Y, Bai Y, Guo X, Wang W, Zheng Q, Wang F, Sun D, Li D, Ren G, Yin J. Selection of affinity-improved neutralizing human scFv against HBV PreS1 from CDR3 VH/VL mutant library. Biologicals 2016; 44:271-275. [PMID: 27255707 DOI: 10.1016/j.biologicals.2016.05.003] [Citation(s) in RCA: 2] [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: 01/09/2016] [Revised: 05/03/2016] [Accepted: 05/06/2016] [Indexed: 12/17/2022] Open
Abstract
A CDR3 mutant library was constructed from a previously isolated anti-HBV neutralizing Homo sapiens scFv-31 template by random mutant primers PCR. Then the library was displayed on the inner membrane surface in Escherichia coli periplasmic space. Seven scFv clones were isolated from the mutant library through three rounds of screening by flow cytometry. Competition ELISA assay indicates that isolated scFv fragments show more efficient binding ability to HBV PreS1 compared with parental scFv-31. HBV neutralization assay indicated that two clones (scFv-3 and 59) show higher neutralizing activity by blocking the HBV infection to Chang liver cells. Our method provides a new strategy for rapid screening of mutant antibody library for affinity-enhanced scFv clones and the neutralizing scFvs obtained from this study provide a potential alternative of Hepatitis B immune globulin.
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Affiliation(s)
- YanMin Chen
- College of Life Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China.
| | - Yin Bai
- College of Life Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China; The 211th Hospital of People's Liberation Army, Harbin 150080, People's Republic of China.
| | - XiaoChen Guo
- College of Life Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China.
| | - WenFei Wang
- College of Life Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China.
| | - Qi Zheng
- College of Life Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China.
| | - FuXiang Wang
- Harbin Medical University, The Fourth Affiliated Hospital, Nangang District, Harbin 150001, People's Republic of China.
| | - Dejun Sun
- Harbin Pharmaceutical Group Bio-vaccine Co., Ltd., Harbin, 150000, People's Republic of China.
| | - DeShan Li
- College of Life Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China.
| | - GuiPing Ren
- College of Life Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China.
| | - JieChao Yin
- College of Life Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China.
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