ACTengine® IMA204 (COL6A3 exon 6) – Immatics and the University of Pennsylvania co-authored a research paper published in the peer-reviewed journal, Science Translational Medicine, that highlighted Immatics’ differentiated approach to develop TCR-based therapies through its proprietary discovery platforms, XPRESIDENT® and XCEPTOR®. With this approach, Immatics identified a novel proprietary HLA-A*02:01-presented target generated by a tumor-specific alternative splicing event in the abundantly expressed protein collagen type VI alpha-3 (COL6A3). This target is expressed at high target density across multiple solid cancer indications and specific to the tumor stroma. Targeting tumor stroma provides an innovative therapeutic opportunity to disrupt the tumor microenvironment. Immatics has engineered target-specific, affinity-enhanced proprietary TCRs, one of them being CD8-independent and thus facilitating targeting of COL6A3 exon 6 positive cells by both CD4 and CD8 T cells. The TCR-T candidate, IMA204 was able to eliminate tumor cells at physiological target levels in in vitro studies and in vivo mouse models. Due to Immatics focusing its clinical resources on the three IMA203 Phase 1b cohorts as well as accelerating the clinical development for the PRAME TCER® IMA402, the company has delayed the IND submission for an ACTengine® candidate directed against COL6A3 exon 6.
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