iBio, Inc. announced positive pre-clinical in vivo data for three immuno-oncology candidates, anti-EGFRvIII, CCR8 and a bispecific TROP-2 x CD3, advancing these programs to clinical candidate selection stage. The anti-EGFRvIII antibody was specially engineered to enhance its ability to attack cancer cells and has proven effective in a mouse model for head and neck cancer. In preclinical studies, iBio?s anti-EGFRvIII antibody demonstrated a 43 percent reduction in tumor growth compared to untreated animals.

iBio developed the antibody using its patented AI epitope steering technology. This innovative approach allows iBio to target a specific variant of the Epidermal Growth Factor Receptor (EGFR) found in tumors without affecting the normal version of the receptor present in healthy tissue. By focusing solely on the tumor-specific variant, iBio aims to reduce potential side effects.

In addition to the anti-EGFR program, iBio?s CCR8 antibody has proven effective in a mouse model for colon cancer. Preclinical studies show the anti-CCR8 molecule inhibited tumor growth and achieved a 22 percent reduction in tumor size compared to its pre-treatment dimensions. Using its patented AI epitope steering platform, iBio specifically engineered the anti-CCR8 molecule to enhance its ability to attack cancer cells without affecting its close relative, CCR4, even though their binding regions are highly similar.

This selective targeting demonstrates the power of iBio's epitope steering platform and is believed to minimize potential side effects. In a recent study involving a humanized mouse model of squamous cell carcinoma, iBio?s TROP-2 x CD3 bi-specific antibody demonstrated a significant 36 percent reduction in tumor size within just 14 days after tumor implantation, and after only a single dose. iBio's TROP-2 x CD3 was engineered using its proprietary EngageTx?

T-cell engager antibody platform, which represents a cutting-edge approach to developing next-generation bispecific antibodies for immuno-oncology applications. TROP-2 x CD3 is a bispecific antibody targeting an overexpressed cell surface protein in multiple solid tumors, including breast, lung, colorectal, and pancreatic cancers. iBio is currently exploring whether the molecule also shows efficacy in other solid tumors.