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Lin TY, Tsai TH, Chen CT, Yang TW, Chang FL, Lo YN, Chung TS, Cheng MH, Chen WC, Tsai KC, Lee YC. Generation of avian-derived anti-B7-H4 antibodies exerts a blockade effect on the immunosuppressive response. Exp Anim 2021; 70:333-343. [PMID: 33716253 PMCID: PMC8390317 DOI: 10.1538/expanim.20-0178] [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] [Indexed: 12/20/2022] Open
Abstract
For highly conserved mammalian protein, chicken is a suitable immune host to generate antibodies. Monoclonal antibodies have been successfully targeted with
immunity checkpoint proteins as a means of cancer treatment; this treatment enhances tumor-specific immunity responses through immunoregulation. Studies have
identified the importance of B7-H4 in immunoregulation and its use as a potential target for cancer treatment. High levels of B7-H4 expression are found in
tumor tissues and are associated with adverse clinical and pathological characteristics. Using the phage display technique, this study isolated specific
single-chain antibody fragments (scFvs) against B7-H4 from chickens. Our experiment proved that B7-H4 clearly induced the inhibition of T-cell activation.
Therefore, use of anti-B7-H4 scFvs can effectively block the exhaustion of immunity cells and also stimulate and activate T-cells in peripheral blood
mononuclear cells. Sequence analysis revealed that two isolated scFv S2 and S4 have the same VH complementarity-determining regions (CDRs) sequence. Molecule
docking was employed to simulate the complex structures of scFv with B7-H4 to analyze the interaction. Our findings revealed that both scFvs employed CDR-H1 and
CDR-H3 as main driving forces and had strong binding effects with the B7-H4. The affinity of scFv S2 was better because the CDR-L2 loop of the scFv S2 had three
more hydrogen bond interactions with B7-H4. The results of this experiment suggest the usefulness of B7-H4 as a target for immunity checkpoints; the isolated
B7-H4-specific chicken antibodies have the potential for use in future cancer immunotherapy applications.
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Affiliation(s)
- Tsai-Yu Lin
- TMU Research Center of Cancer Translational Medicine, Taipei Medical University, No. 250, Wuxing Street, Taipei 11031, Taiwan
| | - Tsung-Hsun Tsai
- Department of Psychiatry, Kaohsiung Armed Forces General Hospital, No.2, Zhongzheng 1st Rd., Lingya Dist., Kaohsiung 80284, Taiwan
| | - Chih-Tien Chen
- Institute of Medicine, Chung Shan Medical University, No.110, Sec.1, Jianguo N. Rd., Taichung 40201, Taiwan.,Department of Surgery, Taichung Veterans General Hospital, No.1650, Taiwan Boulevard Sect. 4, Taichung 40705, Taiwan
| | - Tz-Wen Yang
- TMU Research Center of Cancer Translational Medicine, Taipei Medical University, No. 250, Wuxing Street, Taipei 11031, Taiwan
| | - Fu-Ling Chang
- Ph.D. Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University and Academia Sinica, No. 250, Wuxing Street, Taipei 11031, Taiwan
| | - Yan-Ni Lo
- TMU Research Center of Cancer Translational Medicine, Taipei Medical University, No. 250, Wuxing Street, Taipei 11031, Taiwan
| | - Ting-Sheng Chung
- Department of Psychiatry, Kaohsiung Armed Forces General Hospital, No.2, Zhongzheng 1st Rd., Lingya Dist., Kaohsiung 80284, Taiwan
| | - Ming-Hui Cheng
- Department of Laboratory Medicine, Lo-Hsu Medical Foundation, Lotung Poh-Ai Hospital, No. 83, Nanchang St., Luodong Township, Yilan 26546, Taiwan
| | - Wang-Chuan Chen
- The School of Chinese Medicine for Post Baccalaureate, I-Shou University, No.1, Sec. 1, Syuecheng Rd., Dashu District, Kaohsiung 84001, Taiwan.,Department of Chinese Medicine, E-Da Hospital, No.8, Yida Rd., Jiaosu Village Yanchao District, Kaohsiung 82445, Taiwan
| | - Keng-Chang Tsai
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, No. 155-1, Sec. 2, Linong St., Beitou District, Taipei 11221, Taiwan.,Ph.D. Program in Medical Biotechnology, College of Medical Science and Technology, Taipei Medical University, No. 250, Wuxing Street, Taipei 11031, Taiwan
| | - Yu-Ching Lee
- TMU Research Center of Cancer Translational Medicine, Taipei Medical University, No. 250, Wuxing Street, Taipei 11031, Taiwan.,Ph.D. Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, No. 250, Wuxing Street, Taipei 11031, Taiwan.,Ph.D. Program in Medical Biotechnology, College of Medical Science and Technology, Taipei Medical University, No. 250, Wuxing Street, Taipei 11031, Taiwan.,Ph.D. Program in Biotechnology Research and Development, College of Pharmacy, Taipei Medical University, No. 250, Wuxing Street, Taipei 11031, Taiwan.,Biomedical Commercialization Center, Taipei Medical University, No. 250, Wuxing Street, Taipei 11031, Taiwan
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