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Zhang L, Miao W, Zhou M, Lin M, Fu C, Wu Z, Lei X, Xu J, Cao S, Zhu S. Neutralizing VHH Antibodies Targeting the Spike Protein of PEDV. Vet Sci 2024; 11:533. [PMID: 39591307 PMCID: PMC11598873 DOI: 10.3390/vetsci11110533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2024] [Revised: 10/21/2024] [Accepted: 10/25/2024] [Indexed: 11/28/2024] Open
Abstract
Porcine epidemic diarrhea virus (PEDV) is a highly contagious coronavirus that infect pigs' intestinal epithelial cells, causing high morbidity and mortality. Due to the rapid mutation of PEDV, vaccine efficacy is uncertain, prompting exploration of alternative treatments. Nanobodies, also known as variable heavy chain domains of heavy chain-only antibodies (VHHs), offer significant potential in biomedical applications due to their small size and high specificity. In this study, yeast two-hybrid technology was employed to screen for eight specific VHH sequences targeting the PEDV S protein from a synthetically constructed nanobody yeast library. The VHH genes were then cloned into expression plasmids for recombinant protein production, and the resulting VHHs (termed PEDV S-VHHs) were purified. Indirect immunofluorescence assay (IFA) and Western blotting analysis confirmed that these VHHs specifically bind to both PEDV and its S protein. Neutralization assays demonstrated that seven PEDV S-VHHs exhibited potent neutralizing activity against PEDV. Additionally, a combination of these seven antibodies showed enhanced antiviral effects. Preliminary predictions were also made regarding the binding sites between these VHHs and PEDV. The PEDV S-VHHs described in this study hold potential as candidates for the prevention and treatment of PEDV infection.
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Affiliation(s)
- Li Zhang
- Jiangsu Key Laboratory for High-Tech Research and Development of Veterinary Biopharmaceuticals, Engineering Technology Research Center for Modern Animal Science and Novel Veterinary Pharmaceutic Development, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (L.Z.); (M.Z.); (Z.W.); (X.L.)
- College of Veterinary Pharmacy, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (W.M.); (M.L.); (C.F.)
| | - Wei Miao
- College of Veterinary Pharmacy, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (W.M.); (M.L.); (C.F.)
| | - Mo Zhou
- Jiangsu Key Laboratory for High-Tech Research and Development of Veterinary Biopharmaceuticals, Engineering Technology Research Center for Modern Animal Science and Novel Veterinary Pharmaceutic Development, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (L.Z.); (M.Z.); (Z.W.); (X.L.)
- College of Veterinary Pharmacy, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (W.M.); (M.L.); (C.F.)
| | - Miao Lin
- College of Veterinary Pharmacy, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (W.M.); (M.L.); (C.F.)
| | - Changyao Fu
- College of Veterinary Pharmacy, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (W.M.); (M.L.); (C.F.)
| | - Zhi Wu
- Jiangsu Key Laboratory for High-Tech Research and Development of Veterinary Biopharmaceuticals, Engineering Technology Research Center for Modern Animal Science and Novel Veterinary Pharmaceutic Development, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (L.Z.); (M.Z.); (Z.W.); (X.L.)
- College of Veterinary Pharmacy, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (W.M.); (M.L.); (C.F.)
| | - Xinnuo Lei
- Jiangsu Key Laboratory for High-Tech Research and Development of Veterinary Biopharmaceuticals, Engineering Technology Research Center for Modern Animal Science and Novel Veterinary Pharmaceutic Development, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (L.Z.); (M.Z.); (Z.W.); (X.L.)
- College of Veterinary Pharmacy, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (W.M.); (M.L.); (C.F.)
| | - Jialong Xu
- Medical School, Nanjing University, Nanjing 210093, China;
| | - Shinuo Cao
- Jiangsu Key Laboratory for High-Tech Research and Development of Veterinary Biopharmaceuticals, Engineering Technology Research Center for Modern Animal Science and Novel Veterinary Pharmaceutic Development, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (L.Z.); (M.Z.); (Z.W.); (X.L.)
- College of Veterinary Pharmacy, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (W.M.); (M.L.); (C.F.)
| | - Shanyuan Zhu
- Jiangsu Key Laboratory for High-Tech Research and Development of Veterinary Biopharmaceuticals, Engineering Technology Research Center for Modern Animal Science and Novel Veterinary Pharmaceutic Development, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (L.Z.); (M.Z.); (Z.W.); (X.L.)
- College of Veterinary Pharmacy, Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China; (W.M.); (M.L.); (C.F.)
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