Potent Therapeutic Activity Against Peritoneal Dissemination and Malignant Ascites by the Novel Anti-Folate Receptor Alpha Antibody KHK2805
| Autor: | Toshihiko Ishii, Tsuguo Kubota, Kaito Nihira, Kazuya Yamano, Naoya Kameyama, Hiroshi Ando, Munetoshi Ando, Ryuichiro Nakai, Mariko Nakano, Kazuyasu Nakamura, Yui Suzuki, Maiko Adachi, Yutaka Kanda, Keiko Nagata |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Original article Cancer Research endocrine system diseases Humanized antibody lcsh:RC254-282 Epitope 03 medical and health sciences 0302 clinical medicine Ascites Medicine Cytotoxicity Antibody-dependent cell-mediated cytotoxicity biology business.industry lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens medicine.disease 030104 developmental biology Oncology 030220 oncology & carcinogenesis Immunology biology.protein Immunohistochemistry Antibody medicine.symptom business Ovarian cancer |
| Zdroj: | Translational Oncology, Vol 10, Iss 5, Pp 707-718 (2017) Translational Oncology |
| ISSN: | 1936-5233 |
| DOI: | 10.1016/j.tranon.2017.06.007 |
| Popis: | Many ovarian cancer patients often show peritoneal metastasis with malignant ascites. However, unmet medical needs remain regarding controlling these symptoms after tumors become resistant to chemotherapies. We developed KHK2805, a novel anti-folate receptor α (FOLR1) humanized antibody with enhanced antibody-dependent cellular cytotoxicity (ADCC) and complement-dependent cytotoxicity (CDC). The primary aim of the present study was to evaluate whether the anti-tumor activity of KHK2805 was sufficient for therapeutic application against peritoneal dissemination and malignant ascites of platinum-resistant ovarian cancer in preclinical models. Here, both the ADCC and CDC of KHK2805 were evaluated in ovarian cancer cell lines and patient-derived samples. The anti-tumor activity of KHK2805 was evaluated in a SCID mouse model of platinum-resistant peritoneal dissemination. As results, KHK2805 showed specific binding to FOLR1 with high affinity at a novel epitope. KHK2805 exerted potent ADCC and CDC against ovarian cancer cell lines. Furthermore, primary platinum-resistant malignant ascites cells were susceptible to autologous ADCC with KHK2805. Patient-derived sera and malignant ascites induced CDC of KHK2805. KHK2805 significantly reduced the total tumor burden and amount of ascites in SCID mice with peritoneal dissemination and significantly prolonged their survival. In addition, the parental rat antibody strongly stained serous and clear cell-type ovarian tumors by immunohistochemistry. Overall, KHK2805 showed cytotoxicity against both ovarian cancer cell lines and patient-derived cells. These translational study findings suggest that KHK2805 may be promising as a novel therapeutic agent for platinum-resistant ovarian cancer with peritoneal dissemination and malignant ascites. |
| Databáze: | OpenAIRE |
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