Construction and Characterization of 1F5 Chimeric Anti-CD20 Monoclonal Antibodies: An Efficient Splicing by Overlap Extension-polymerase Chain Reaction Technique
Construction of 1F5 Chimeric mAbs Using an Efficient SOE-PCR Technique
Despite the unparalleled success of anti-CD20-targeted immunotherapy, the currently available mAbs are not sufficiently efficacious in the treatment of lymphoma. 1F5 is one of a panel of anti-CD20 mAbs that was used in the B-cell lymphoma serotherapy. Despite the efficacy of murine 1F5 mAbs in lymphoma patients, the 1F5 chimeric antibodies with human effector functionality are yet to be approved and widely used in the treatment of lymphoma. In this study, the conversion of 1F5 mAb from mouse IgG2a to human-mouse chimeric IgG1 was achieved and the chimeric antibody was partially characterized.
We constructed the 1F5 chimeric mouse-human anti-CD20 antibody genes using an efficient Splicing by overlap extension-polymerase chain reaction (SOE-PCR) technique and cloned the chimeric heavy and light genes in pBudCE4.1mammalian expression vector, followed by purification of the expressed chimeric 1F5 mAbs using affinity chromatography. Our investigation also included the biological properties of purified chimeric antibodies.
The generated 1F5 chimeric mAbs mediate complement-dependent cytotoxicity (CDC) and antibody-dependent cellular cytotoxicity (ADCC) against Raji and Daudi Burkitt's lymphoma cell lines, which were comparable with rituximab and exhibit superior reduction in cell viability in vitro, compared to rituximab.
The current study indicated that the generated chimeric 1F5 mAbs has potential CDC and ADCC activity which was comparable with rituximab whereas it exhibits a superior reduction in cell viability, compared to rituximab. Our work contributes to future studies involving in vivo biological functions and the application of the 1F5 chimeric antibody.
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|Issue||Vol 20 No 2 (2021)|
|CD20 Cell proliferation Cytotoxicity tests Monoclonal antibody|
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