Structure and Functional Characterization of a Humanized Anti-CCL20 Antibody following Exposure to Serum Reveals the Formation of Immune Complex That Leads to Toxicity
| العنوان: | Structure and Functional Characterization of a Humanized Anti-CCL20 Antibody following Exposure to Serum Reveals the Formation of Immune Complex That Leads to Toxicity |
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| المؤلفون: | Stephen H. Trulli, J. David Taylor, Shugui Chen, Michael Herdman, Charles S Hottenstein, Michael Byrne, Joseph Minetti, John R. White, Andrew S. Thomson, Gerben Bouma, Shing H. Mai |
| المصدر: | The Journal of Immunology. 206:1067-1076 |
| بيانات النشر: | The American Association of Immunologists, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | T cell, Immunology, chemical and pharmacologic phenomena, Inflammation, Antigen-Antibody Complex, Pharmacology, Immune complex formation, Autoimmune Diseases, 03 medical and health sciences, 0302 clinical medicine, medicine, Animals, Humans, Immunology and Allergy, Cytotoxicity, Chemokine CCL20, biology, Chemistry, Cell Membrane, Antibodies, Monoclonal, hemic and immune systems, Complement System Proteins, Immune complex, Complement system, CCL20, Macaca fascicularis, medicine.anatomical_structure, Immunoglobulin G, biology.protein, Th17 Cells, medicine.symptom, Antibody, 030215 immunology |
| الوصف: | mAbs have revolutionized the treatment of autoimmune disorders. Even though mAbs have shown impressive efficacy in blocking T cell or B cell activation and/or recruitment to sites of inflammation, this group of biologicals are not devoid of adverse effects. The most serious adverse effects include infusion reactions, including the activation of the complement pathway. In this study, we present a detailed structure–function study of an anti-CCL20 humanized IgG1 mAb that neutralizes CCL20 chemokine and prevents the recruitment of Th17 cells to sites of inflammation. We demonstrate that the anti-CCL20 Ab changes significantly following administration to humans and monkeys and exposure to human serum. Analysis of the drug product revealed that the anti-CCL20 Ab has unexpectedly high C1q binding. This high binding was linked to immune complex formation in vivo but not during in vitro serum incubation. The immune complex contained multiple complement components. Anti-CCL20 Ab-mediated, complement-dependent cytotoxicity occurred when the Ab bound to CCL20 tethered to the cell membrane of target cells. Taken together, these results provide a likely cause for the animal toxicity observed. In addition, anti-CCL20 revealed progressive acidification because of N100 (located in CDR) deamidation over time, which did not directly impact Ag binding. Our study demonstrates that the safety profiling of mAbs should include the evaluation of effector functions in addition to typical stressed conditions. |
| تدمد: | 1550-6606 0022-1767 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::961e7012799751a7d4ba2951ec4699f6 https://doi.org/10.4049/jimmunol.2000336 |
| رقم الأكسشن: | edsair.doi.dedup.....961e7012799751a7d4ba2951ec4699f6 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15506606 00221767 |
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