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iBio Discovers New Panel of CD3 T-Cell Binding Antibodies Using its Patented AI Epitope Steering Platform

iBio,an AI-driven innovator of precision antibody immunotherapies, announced that a presentation given  by its VP & Head of Machine Learning & Platform Technologies, Matt Greving, Ph.D., during Carterra’s “Unlocking High-Throughput Biology and Drug Discovery” symposium in San Diego, CA, revealed the discovery of a panel of CD3 T-cell binding antibodies, representing an important first step for the Company into bispecific immuno-oncology therapies.

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T-cell-redirecting bispecific antibodies are a new class of therapeutic antibodies designed to simultaneously bind to T cells via CD3 and to tumor cells via tumor-specific antigens (“TSA”) or tumor-associated antigens (“TAA”), inducing T-cell-mediated killing of tumor cells.1

Early studies of CD3-based T-cell engagers showed promising clinical efficacy, but were hampered by severe dose-limiting toxicities, due in large part to anti-CD3 binders with high potency.2 Another hurdle in the development of CD3-based T-cell engagers has been the often-observed lack of cross-reactivity with non-human primates. This has made it difficult to assess the potential of CD3 antibody therapies in humans, potentially delaying their clinical development.3

With the aim of overcoming these challenges, iBio employed its patented epitope steering technology to guide antibodies towards specific CD3 epitopes. The Company’s AI-based antibody optimizer, combined with its mammalian display technology broadened the range of CD3 affinities, identified antibodies with cross-reactivity to non-human primates and increased the humanness of the antibody sequences.

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Dr. Greving explained, “Our leading epitope-steering and mammalian-display integration enabled efficient discovery of a diverse panel of CD3 antibodies. With our technology stack, we were able to overcome key challenges associated with CD3 antibody discovery, including identifying T-cell binding antibodies with non-human primate cross-reactivity.”

In response to the Company’s latest AI platform success, iBio’s Interim Chief Executive Officer and Chief Scientific Officer, Martin Brenner, DVM, Ph.D., affirmed that, “By combining two of our platform technologies, we were successful in generating anti-CD3 antibodies with highly desirable characteristics. By adding CD3-based T-cell engaging antibodies as a tumor cell killing modality, we now have a valuable option to tune efficacy and safety of our future and existing pipeline programs.”

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[To share your insights with us, please write to sghosh@martechseries.com]

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