Provided here is a humanized antibody that recognizes human MUC-1. This antibody internalization from the cell surface occurs in an efficient temperature-dependent manner. It also exerts specific cytotoxicity against cancer cells.
Figure 1 Immunoreactivity of DMB mAbs with MUC1-Xex.
ELISA plates were coated with 1 of 3 recombinant bacterial MUC1 proteins extracellular domain of the MUC1-X protein (dotted lines), MUC1 SEA module (dashed lines), or the uncleaved MUC1 4G-SEA module protein (dashed and dotted lines). The indicated mAbs were applied and bound antibody was detected as described in Materials and Methods.
Pichinuk, E., Benhar, I., Jacobi, O., Chalik, M., Weiss, L., Ziv, R., ... & Wreschner, D. H. (2012). Antibody targeting of cell-bound MUC1 SEA domain kills tumor cells. Cancer research, 72(13), 3324-3336.
Figure 2 Titration analysis of DMB monoclonal anti-MUC1 SEA module α/β junction antibodies to human breast cancer cells expressing MUC1 and affinity analysis.
Antibody DMB5F3 was shown to have the highest affinity.
Pichinuk, E., Benhar, I., Jacobi, O., Chalik, M., Weiss, L., Ziv, R., ... & Wreschner, D. H. (2012). Antibody targeting of cell-bound MUC1 SEA domain kills tumor cells. Cancer research, 72(13), 3324-3336.
Figure 3 Flow cytometry analyses were carried out with the chDMB5F3 antibody at the indicated concentrations using MUC1-negative parental DA3 cells (DA3-PAR) and mouse cell transfectants (DA3-TM) expressing human MUC1-TM (E and F, respectively).
Pichinuk, E., Benhar, I., Jacobi, O., Chalik, M., Weiss, L., Ziv, R., ... & Wreschner, D. H. (2012). Antibody targeting of cell-bound MUC1 SEA domain kills tumor cells. Cancer research, 72(13), 3324-3336.
Figure 4 MUC1+ cells were incubated with DyLight649-labeled DMB5F3 mAb at 4°C and at 37°C (G and H, respectively) and photographed by confocal laser microscopy.
Pichinuk, E., Benhar, I., Jacobi, O., Chalik, M., Weiss, L., Ziv, R., ... & Wreschner, D. H. (2012). Antibody targeting of cell-bound MUC1 SEA domain kills tumor cells. Cancer research, 72(13), 3324-3336.
Figure 5 Specificity and affinity of chDMB5F3 immunotoxin (IT) for cell killing of cancer cells.
Pichinuk, E., Benhar, I., Jacobi, O., Chalik, M., Weiss, L., Ziv, R., ... & Wreschner, D. H. (2012). Antibody targeting of cell-bound MUC1 SEA domain kills tumor cells. Cancer research, 72(13), 3324-3336.
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• Increased sensitivity
• Confirmed specificity
• High repeatability
• Excellent batch-to-batch consistency
• Sustainable supply
• Animal-free production
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