Claudin 18.2 (CLDN18.2) has emerged as a target for gastrointestinal cancer, however, on-target/off-tumor toxicities have been also reported. Here, after reporting evidence of erosive gastritis in patients treated with CLDN18.2 targeted immunotherapies, the authors develop and characterize CLDN18.2 fully-human VH-only single domain CARs, showing that a lower affinity CAR mitigates on-target/off-tumor toxicity while preserving anti-tumor efficacy in gastric cancer models.
- Elizabeth J. Carstens
- Kazuki Takahashi
- Eric L. Smith