CytomX Therapeutics Announces Publication of First-in-Human Data for CX-2029 in Clinical Cancer Research

Excerpt from the Press Release:

SOUTH SAN FRANCISCO, Calif., June 21, 2021 (GLOBE NEWSWIRE) — CytomX Therapeutics, Inc. (Nasdaq: CTMX), a clinical-stage oncology-focused biopharmaceutical company pioneering a novel class of investigational conditionally activated therapeutics based on its Probody^® technology platform, today announced that results from its Phase 1 first-in-human study of CX-2029 in patients with advanced solid tumors were published online in the peer-reviewed journal Clinical Cancer Research. This study showed that CX-2029, currently being co-developed by CytomX and AbbVie, was generally well-tolerated and can elicit anti-tumor responses in certain patients.

“These results highlight that our industry-leading Probody platform can be successfully leveraged to create conditionally activated ADCs against previously undruggable targets. For the first time, CD71 has been shown to be a viable therapeutic cancer target,” said Alison L. Hannah, M.D., senior vice president and chief medical officer of CytomX Therapeutics.

CD71 is a cell surface protein essential for iron uptake in dividing cells and is highly expressed in a number of solid and hematologic cancers. However, given its central role in iron metabolism, CD71 is present on most healthy cells and has been, until now, undruggable with conventional ADCs. CX-2029 is designed to be activated in the tumor microenvironment by tumor-associated proteases, thereby limiting off-tumor toxicity and creating a therapeutic window for CD71.

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