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ALG.APV-527 Engineered to Engage the Immune System for the Potential Treatment of Multiple Solid Tumor Indications
5T4 is a protein predominantly expressed on tumor cells. It is present at very low levels or not at all in normal tissue. This enables the immune-activating effect of ALG.APV-527 to be targeted specifically to the tumor and not against normal tissue, the goal being effective tumor-directed immune activation with minimal side effects. The 5T4 tumor antigen is present on a number of different solid tumors, including breast, cervical, non-small-cell-lung, prostate, renal, gastric, colorectal and bladder cancers, indicating that ALG.APV-527 may be used for the treatment of several different types of cancer.
“The fact that 5T4 is selectively expressed on tumor cells in many different cancer indications, but in very low levels in normal tissue, makes it a very attractive target for tumor-directed immunotherapy,” said Professor
By combining a tumor-binding and an immunomodulatory antibody in one molecule, Alligator and Aptevo have created a drug candidate whose effect is localized to the tumor area, activating the tumor-specific immune cells present there.
ALG.APV-527 is a bispecific antibody (4-1BB x 5T4) intended for tumor-directed treatment of solid cancers. The ALG.APV-527 antibody consists of two parts, one part activating tumor-specific T cells through the co-stimulatory receptor 4-1BB (CD137), the other part binding to the 5T4 protein expressed on the surface of tumor cells.
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