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Title: | Binding Affinity, Specificity and Comparative Biodistribution of the Parental Murine Monoclonal Antibody MX35 (Anti-NaPi2b) and Its Humanized Version Rebmab200 |
Authors: | LINDEGREN, Sture; ANDRADE, Luciana N. S.; BACK, Tom; MACHADO, Camila Maria L.; HORTA, Bruno Brasil; BUCHPIGUEL, Carlos; MORO, Ana Maria; OKAMOTO, Oswaldo Keith; JACOBSSON, Lars; CEDERKRANTZ, Elin; WASHIYAMA, Kohshin; ANEHEIM, Emma; PALM, Stig; JENSEN, Holger; TUMA, Maria Carolina B.; CHAMMAS, Roger; HULTBORN, Ragnar; ALBERTSSON, Per |
Citation: | PLOS ONE, v.10, n.5, article ID e0126298, 16p, 2015 |
Abstract: | The aim of this preclinical study was to evaluate the characteristics of the monoclonal antibody Rebmab200, which is a humanized version of the ovarian-specific murine antibody MX35. This investigation contributes to the foundation for future clinical alpha-radioimmunotherapy of minimal residual ovarian cancer with At-211-Rebmab200. Here, the biodistribution of 211At-Rebmab200 was evaluated, as was the utility of Tc-99m-Rebmab200 for bioimaging. Rebmab200 was directly compared with its murine counterpart MX35 in terms of its in-vitro capacity for binding the immobilized NaPi2B epitope and live cells; we also assessed its biodistribution in nude mice carrying subcutaneous OVCAR-3 tumors. Tumor antigen and cell binding were similar between Rebmab200 and murine MX35, as was biodistribution, including normal tissue uptake and in-vivo tumor binding. We also demonstrated that Tc-99m-Rebmab200 can be used for single-photon emission computed tomography of subcutaneous ovarian carcinomas in tumor-bearing mice. Taken together, our data support the further development of Rebmab200 for radioimmunotherapy and diagnostics. |
Appears in Collections: | Artigos e Materiais de Revistas Científicas - FM/MDR Artigos e Materiais de Revistas Científicas - HC/ICESP Artigos e Materiais de Revistas Científicas - HC/ICHC Artigos e Materiais de Revistas Científicas - LIM/24 Artigos e Materiais de Revistas Científicas - LIM/43 Artigos e Materiais de Revistas Científicas - ODS/03 |
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