CTX130

Although trials for solid tumors (e.g., CYAD-101, CTX130) show modest responses, challenges such as tumor heterogeneity and T cell exhaustion remain. Future research should focus on optimizing gene editing precision, integrating combination therapies, and advancing scalable manufacturing platforms. With expanded targets and cell types, UCAR therapies show promise for both hematologic and solid tumors, reshaping cancer treatment and patient outcomes.

P1, N=19, Terminated, CRISPR Therapeutics AG | N=107 --> 19 | Trial completion date: Apr 2027 --> Oct 2024 | Active, not recruiting --> Terminated | Trial primary completion date: Feb 2027 --> Oct 2024; Patients to be followed up in the CRSP-ONC-LTF study

P1, N=49, Terminated, CRISPR Therapeutics AG | Trial completion date: May 2027 --> Aug 2024 | Active, not recruiting --> Terminated | Trial primary completion date: Mar 2027 --> Aug 2024; Patients to be followed up in the CRSP-ONC-LTF study

In patients with heavily pretreated T-cell lymphoma, CTX130 showed manageable safety and a promising objective response rate. This study shows that allogeneic, readily available CAR T cells can be safely given to patients with relapsed or refractory T-cell lymphoma. A next-generation CAR T-cell therapy containing additional potency gene edits (CTX131) is in clinical development.

Finally, we report on a next-generation CAR T construct, CTX131, in which synergistic potency edits to CTX130 confer improved expansion and efficacy in preclinical studies. Although the role of CAR T cells is well established in hematologic malignancies, the clinical experience in solid tumors has been disappointing. This clinical trial demonstrates the first complete response in a patient with RCC, reinforcing the potential benefit of CAR T cells in the treatment of solid tumors.

P1, N=45, Active, not recruiting, CRISPR Therapeutics AG | Recruiting --> Active, not recruiting

P1, N=107, Active, not recruiting, CRISPR Therapeutics AG | Recruiting --> Active, not recruiting

CD70 has emerged as a promising solid tumor target for chimeric antigen receptor (CAR)-bearing T or natural killer (NK) cells, with one allogeneic CAR T-cell therapy, CTX130, showing preliminary efficacy in renal cell carcinoma. Further, assessments of a cord blood-derived CAR-NK alternative have started; the trial will be the first to use cryopreserved NK cells.

Pts received lymphodepleting chemotherapy (LDC) with fludarabine 30mg/m 2 and cyclophosphamide 500mg/m 2 for 3 days, followed by CTX130. Conclusion We have observed clinically meaningful responses, including CRs with CTX130, the first CAR T directed against the novel target, CD70. CTX130 has an acceptable safety profile in pts with heavily pretreated R/R TCL and will be investigated further in an expansion phase of the study.

In summary, KO of CD70 confers benefit to CAR-T cells that far exceeds KO of other checkpoint related genes, and this benefit was present regardless of the antigen being targeted. CD70 KO is included in the CTX130 investigational allogeneic CAR-T therapy currently in clinical trials.

CD70 (CD27 ligand) is a candidate target antigen for T cell lymphomas and has been is the subject of clinical trials using an enhanced ADCC antibody (ARGX-110). Consistent with these prior observations, CTX130 exhibited high potency in vitro and in vivo against T cell lymphoma cells across a range of CD70 antigen density and representing different types of T cell lymphomas such as Sezary syndrome and cutaneous T cell lymphoma (CTCL). CTX130 may thus be a valid therapeutic to evaluate in T cell lymphoma patients.