Monkey TPBG Stable Cell Line - CHO-K1

The TPBG gene, also known as trophoblast glycoprotein, 5T4, or Wnt-activated inhibitory factor 1 (WAIF1), encodes a leucine-rich transmembrane glycoprotein that plays a role in cell adhesion, Wnt signaling modulation, and cell migration. The Monkey TPBG Stable Cell Line - CHO-K1 is a recombinant Chinese hamster ovary (CHO-K1) cell line engineered to stably express the monkey (cynomolgus or rhesus) TPBG protein on the cell surface. CHO-K1 cells are widely used as a mammalian expression host due to their robust growth characteristics, high protein yield, and post-translational modification capabilities that closely resemble those of native mammalian cells. This stable cell line is generated through transfection of the monkey TPBG gene into CHO-K1 cells followed by antibiotic selection and clonal isolation, ensuring consistent and long-term expression of the target protein. The cell line is typically cryopreserved and can be cultured for multiple passages, making it a reliable and reproducible tool for downstream research.

This stable cell line is particularly valuable for antibody development and screening, as it provides a consistent cell surface antigen target for evaluating monoclonal antibodies, antibody-drug conjugates, or bispecific molecules directed against the TPBG/5T4 antigen. Researchers can use the Monkey TPBG Stable Cell Line - CHO-K1 in flow cytometry-based binding assays, cell-based ELISA, immunocytochemistry, and functional studies to assess antibody affinity, specificity, and internalization. Since TPBG is a well-known oncofetal antigen overexpressed in various solid tumors including colorectal, gastric, ovarian, and non-small cell lung cancers, this cell line supports preclinical research efforts aimed at validating cross-reactive therapeutic candidates that target monkey TPBG as a surrogate for human TPBG. It also serves as a useful tool for studying TPBG-mediated signaling pathways, including its role in the Wnt/beta-catenin pathway and CXCL12/CXCR4 chemotaxis, as well as for evaluating immune effector functions such as antibody-dependent cellular cytotoxicity (ADCC) and complement-dependent cytotoxicity (CDC).