|
1
|
Zhu W, Wang Z, Hu S, Gong Y, Liu Y, Song H, Ding X, Fu Y, Yan Y. Human C5-specific single-chain variable fragment ameliorates brain injury in a model of NMOSD. NEUROLOGY(R) NEUROIMMUNOLOGY & NEUROINFLAMMATION 2019; 6:e561. [PMID: 31044149 PMCID: PMC6467685 DOI: 10.1212/nxi.0000000000000561] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 02/05/2019] [Indexed: 12/01/2022]
Abstract
Objective Using phage display, we sought to screen single-chain variable fragments (scFvs) against complement C5 to treat neuromyelitis optica spectrum disorder (NMOSD). Methods After 5 rounds of phage display, we isolated individual clones and identified phage clones specifically binding to C5 using ELISA. Using aquaporin-4 (AQP4)-transfected cells in vitro, we confirmed whether these scFvs prevented complement-dependent cytotoxicity (CDC) caused by the serum of patients with NMOSD and human complement (hC). We selected an NMOSD mouse model, in which intracerebral NMOSD immunoglobulin G (IgG) and hC injections induce NMOSD-like lesions in vivo. Results We obtained scFvs to test specificity and blocking efficiency. The scFv C5B3 neutralized C5 in the complement activation pathway, which prevented AQP4-IgG-mediated CDC in AQP4-transfected cells. In an NMOSD mouse model, C5B3 prevented AQP4 and astrocyte loss, decreased demyelination, and reduced inflammatory infiltration and membrane attack complex formation in lesions. Conclusions We used phage display to screen C5B3 against C5, which was effective in inhibiting cytotoxicity in vitro and preventing CNS pathology in vivo.
Collapse
Affiliation(s)
- Wenli Zhu
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry (W.Z., Z.W., S.H., Y.G., Y.L., H.S., X.D., Y.F., Y.Y.), National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an; Department of Neurology (W.Z.), Tianjin Neurological Institute, Tianjin Medical University General Hospital; and Department of Neurology (Z.W.), Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Zhen Wang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry (W.Z., Z.W., S.H., Y.G., Y.L., H.S., X.D., Y.F., Y.Y.), National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an; Department of Neurology (W.Z.), Tianjin Neurological Institute, Tianjin Medical University General Hospital; and Department of Neurology (Z.W.), Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Suying Hu
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry (W.Z., Z.W., S.H., Y.G., Y.L., H.S., X.D., Y.F., Y.Y.), National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an; Department of Neurology (W.Z.), Tianjin Neurological Institute, Tianjin Medical University General Hospital; and Department of Neurology (Z.W.), Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Ye Gong
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry (W.Z., Z.W., S.H., Y.G., Y.L., H.S., X.D., Y.F., Y.Y.), National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an; Department of Neurology (W.Z.), Tianjin Neurological Institute, Tianjin Medical University General Hospital; and Department of Neurology (Z.W.), Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Yuanchu Liu
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry (W.Z., Z.W., S.H., Y.G., Y.L., H.S., X.D., Y.F., Y.Y.), National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an; Department of Neurology (W.Z.), Tianjin Neurological Institute, Tianjin Medical University General Hospital; and Department of Neurology (Z.W.), Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Huanhuan Song
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry (W.Z., Z.W., S.H., Y.G., Y.L., H.S., X.D., Y.F., Y.Y.), National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an; Department of Neurology (W.Z.), Tianjin Neurological Institute, Tianjin Medical University General Hospital; and Department of Neurology (Z.W.), Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Xiaoli Ding
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry (W.Z., Z.W., S.H., Y.G., Y.L., H.S., X.D., Y.F., Y.Y.), National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an; Department of Neurology (W.Z.), Tianjin Neurological Institute, Tianjin Medical University General Hospital; and Department of Neurology (Z.W.), Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Ying Fu
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry (W.Z., Z.W., S.H., Y.G., Y.L., H.S., X.D., Y.F., Y.Y.), National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an; Department of Neurology (W.Z.), Tianjin Neurological Institute, Tianjin Medical University General Hospital; and Department of Neurology (Z.W.), Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Yaping Yan
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry (W.Z., Z.W., S.H., Y.G., Y.L., H.S., X.D., Y.F., Y.Y.), National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an; Department of Neurology (W.Z.), Tianjin Neurological Institute, Tianjin Medical University General Hospital; and Department of Neurology (Z.W.), Xuanwu Hospital, Capital Medical University, Beijing, China
| |
Collapse
|