Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Development of A Novel Anti-Epcam Monoclonal Antibody for Various Applications

Version 1 : Received: 28 March 2022 / Approved: 28 March 2022 / Online: 28 March 2022 (10:11:34 CEST)

A peer-reviewed article of this Preprint also exists.

Li, G.; Suzuki, H.; Asano, T.; Tanaka, T.; Suzuki, H.; Kaneko, M.K.; Kato, Y. Development of a Novel Anti-EpCAM Monoclonal Antibody for Various Applications. Antibodies 2022, 11, 41. Li, G.; Suzuki, H.; Asano, T.; Tanaka, T.; Suzuki, H.; Kaneko, M.K.; Kato, Y. Development of a Novel Anti-EpCAM Monoclonal Antibody for Various Applications. Antibodies 2022, 11, 41.

Abstract

The epithelial cell adhesion molecule (EpCAM) is a cell surface glycoprotein, which is widely expressed on normal and cancer cells. EpCAM is involved in cell adhesion, proliferation, survival, stemness, and tumorigenesis. Therefore, EpCAM is thought to be a promising target for cancer diagnosis and therapy. In this study, we established anti-EpCAM monoclonal antibodies (mAbs) using the Cell-Based Immunization and Screening (CBIS) method. We characterized them using flow cytometry, western blotting, and immunohistochemistry. One of the established recombinant anti-EpCAM mAbs, recEpMab-37 (mouse IgG1, kappa), reacted with EpCAM-overexpressed Chinese hamster ovary-K1 cells (CHO/EpCAM) or a colorectal carcinoma cell line (Caco-2). In contrast, recEpMab-37 did not react with EpCAM-knocked out Caco-2 cells. The KD of recEpMab-37 for CHO/EpCAM and Caco-2 was 2.0 × 10-8 M and 3.2 × 10-8 M, respectively. In western blot analysis, recEpMab-37 detected EpCAM of CHO/EpCAM and Caco-2 cells. Furthermore, recEpMab-37 could stain formalin-fixed paraffin-embedded colorectal carcinoma tissues by immunohistochemistry. Taken together, recEpMab-37, established by CBIS method, is useful for detecting EpCAM in various applications.

Keywords

EpCAM; monoclonal antibody; recombinant antibody; colorectal carcinoma

Subject

Medicine and Pharmacology, Pathology and Pathobiology

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