Aucatzyl (obecabtagene autoleucel)

Conclusions : Eighty-four percent of responders to obe-cel for whom MRD by NGS could be analyzed achieved MRD <10‾6 leukemic cells which was associated with more durable responses, and higher EFS and OS rates than those observed in pts with MRD ≥10‾4 and between 10‾4 and 10‾6 leukemic cells. Pts who did not achieve MRD <10‾6 had poorer outcomes.

P1, N=12, Recruiting, Autolus Limited

P1, N=24, Recruiting, Autolus Limited

The FELIX study successfully demonstrated the robust operability of obe-cel manufacturing, QC and logistics processes, meeting target V2C and V2D. All apheresis starting material successfully processed despite the multitude of constraints posed by the COVID-19 pandemic. Further optimization and improvements made during the study increased reliability, consistency and precision of the manufacturing process, and supported the development of a new obe-cel manufacturing facility with greater production capacity that aims to achieve a ≥95% manufacturing success rate with ≤15-day V2C times.

Ultimately, AUTO1 generated with VIII may begin to overcome the product specific factors contributing to CD19+relapse.

P1/2; Trial primary completion date: Jun 2023 --> May 2025

P1, N=12, Active, not recruiting, University College, London | Recruiting --> Active, not recruiting

P1/2; Recruiting --> Active, not recruiting

Its clinical activity has been tested in r/r paediatric and adult B-ALL trials (CARPALL, Ghorashian S et al., Nat Med 2019; ALLCAR19, Roddie C et al., JCO 2021) and more recently in adults with r/r B-cell malignancies (NCT02935257)...Patients underwent bridging therapy as necessary and lymphodepletion with fludarabine (4x30mg/m2) and cyclophosphamide (2x500mg/m2)... The pre-specified interim analysis of the FELIX study demonstrated that obe-cel for adult r/r B-ALL is safe with low rates of Grade > 3 CRS and/or ICANS, even in patients with high burden disease. Obe-cel is effective with high CR/CRi rates and ongoing CAR T persistence in the majority of responders. The trial has completed dosing of all patients in Cohort A. Additional data and longer follow up will be reported at the conference.

Its clinical activity has been tested in r/r paediatric and adult B-ALL trials (CARPALL, Ghorashian S et al., Nat Med 2019; ALLCAR19, Roddie C et al., JCO 2021) and more recently in adults with r/r B-cell malignancies (NCT02935257)...Patients underwent bridging therapy as necessary and lymphodepletion with fludarabine (4x30mg/m2) and cyclophosphamide (2x500mg/m2)... The pre-specified interim analysis of the FELIX study demonstrated that obe-cel for adult r/r B-ALL is safe with low rates of Grade >3 CRS and/or ICANS, even in patients with high burden disease. Obe-cel is effective with high CR/CRi rates and ongoing CAR T persistence in the majority of responders. The trial has completed dosing of all patients in Cohort A. Additional data and longer follow up will be reported at the conference.

CAT/9A8 CART eliminated single and double positive target cells in vitro and eliminated CD19 tumours in vivo. CAT/9A8 CART is being tested in a phase I clinical study NCT02443831.

Building on these properties, we developed AUTO1/22 an autologous CAR T cell product co-transduced with two different lentiviral vectors encoding our existing CD19 CAR and a novel CD22CAR designed to recognise targets with low antigen density...Following fludarabine/cyclophosphamide lymphodepletion, patients received 1x106 /kg CAR+ T cells...Six of 12 patients had relapsed post allogeneic SCT, 6 had received prior Blinatumomab/Inotuzumab and 4 had relapsed after prior Tisagenlecleucel...Cytokine release syndrome (CRS) occurred in 11/12 patients (grade 1 n=5, grade 2 n=6) requiring Tocilizumab in 5 cases, but severe (≥ grade 3) CRS was not seen and no patients required ICU admission for CRS... Our data show that dual CD19/22 targeting CAR T cells generated by co-transduction show a favorable safety profile, with robust expansion/persistence and early efficacy in a heavily pre-treated cohort. To date with we have not observed antigen negative relapse. This contrasts to an incidence of 5/6 CD19 negative relapses in the 12 responders treated with single CD19 targeting CAR T cells (AUTO1) in an earlier cohort and suggests dual targeting may be effective in preventing antigen escape.

Study design: Subjects ≥ 16y received fludarabine (30mg/m2 x3) and cyclophosphamide (60mg/kg x1) conditioning. DLBCL patients additionally received pembrolizumab (200mg) on day -1... AUTO1 has a tolerable safety profile in patients with r/r B-cell cancers despite high disease burden. In the B-ALL cohort, long-term follow-up indicates that 40% of patients continue in remission post-AUTO1. In both indolent and aggressive NHL and in CLL, AUTO1 shows excellent ORR and CAR engraftment/persistence.

P1, N=60, Recruiting, University College, London | Trial completion date: Nov 2032 --> Dec 2033 | Trial primary completion date: Sep 2022 --> Dec 2024

P1/2; Trial completion date: Apr 2024 --> Apr 2025 | Trial primary completion date: Mar 2023 --> Jun 2023

Study design: Subjects ≥ 16y underwent lymphodepletion with fludarabine (30mg/m x3) and cyclophosphamide (60mg/kg x1) prior to AUTO1 infusion, with the exception of the DLBCL cohort who additionally received a single dose of pembrolizumab (200mg) on day -1 to potentiate CAR-T expansion...Early data shows excellent complete remission rates and excellent CAR engraftment/expansion. Additional patients, updated data and longer follow up will be presented.

Study Design: Subjects>/=16y underwent lymphodepletion with fludarabine (Flu;30mg/m2x3) and cyclophosphamide (Cy;60mg/kgx1) and Pembrolizumab (200mgx1) prior to IV AUTO1 infusion (250x10^6 CAR-T)...I-VEN administration was well-tolerated and AUTO1 demonstrated activity via direct CSF infusion in a patient who failed IV therapy. Additional patients, updated biological data and longer follow-up will be presented.

Clinical testing in two academic studies in r/r paediatric [NCT02443831; CARPALL] and adult B-ALL, B-NHL and B-CLL [NCT02935257; ALLCAR19] confirmed the intended function of the receptor, with low levels of cytokine release syndrome CRS and neurotoxicity and long-term engraftment of CAR T-cells 1,2...CONCLUSION Industrialization of an autologous Miltenyi CAR T process is feasible, leading to a comparable product to that manufactured in an academic setting. We have now opened the pivotal multi-centre phase II part of the FELIX study in r/r adult B-ALL patients.

Study design: Subjects ≥ 16y underwent lymphodepletion with fludarabine (30mg/m 2 x3) and cyclophosphamide (60mg/kg x1) prior to AUTO1 infusion, with the exception of the DLBCL cohort who additionally received a single dose of pembrolizumab (200mg) on day -1 to potentiate CAR-T expansion...1/9 developed MAS which resolved with anakinra/dexamethasone...Early data shows 100% complete remission rates and excellent CAR engraftment/expansion. Additional MCL, CLL and DLBCL patients, updated data and longer follow up will be presented.

Clinical testing in two academic studies in relapsed/refractory (r/r) paediatric [ NCT02443831; CARPALL ] and adult B-ALL, B-NHL and B-CLL [NCT02935257; ALLCAR19] confirmed the intended function of the receptor, with low levels of cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity syndrome (ICANS) and long-term engraftment of CAR T-cells 1,2...CONCLUSION Industrialization of an autologous Miltenyi CAR T process is feasible, leading to a comparable product to that manufactured in an academic setting. We have now opened the pivotal multi-center phase II part of the FELIX study in r/r adult B-ALL patients.

AUTO1 demonstrates a tolerable safety profile, high remission rates, and excellent persistence in r/r adult B-ALL. Preliminary data support further development of AUTO1 as a stand-alone treatment for r/r adult B-ALL.

P1, N=12, Recruiting, University College, London | Not yet recruiting --> Recruiting

P1, N=12, Not yet recruiting, University College, London | Initiation date: Nov 2020 --> Feb 2021

P1, N=50, Recruiting, University College, London | Active, not recruiting --> Recruiting