Autolus Therapeutics plc (NASDAQ:AUTL) today announced additional data regarding its ongoing Phase 1/2 clinical trial of its next-generation programmed T cell therapy, AUTO3, to treat adults with relapsed/refractory diffuse large B cell lymphoma (DLBCL). The data is to be presented in a keynote lecture titled “Improved CAR T cell approaches for lymphoid malignancies,” by Dr. Martin Pulé, clinical senior lecturer in the Dept. of Hematology at UCL Cancer Institute and chief scientific officer of Autolus Therapeutics, at the EHA-EBMT 2nd European CAR T Cell Meeting to be held on January 30, 2020 at 17:15 P.M. CET in Stiges (Barcelona), Spain.
“The incremental update in the AUTO3 trial presented at the 2nd European CAR T Cell Meeting continue to support the encouraging early indications of durability and high level of activity previously reported. Together with the encouraging signs of a manageable safety profile in adult patients with DLBCL, these early data for AUTO3 show the potential for a differentiated product profile,” said Dr. Christian Itin, chairman and chief executive officer of Autolus.
“I’m pleased to be presenting today an encouraging data update from our ALEXANDER trial of AUTO3, our CD19/CD22 dual-targeting CAR-T product candidate in DLBCL,” said Dr Martin Pulé, founder and chief scientific officer of Autolus. “Together with the data we have generated to date for AUTO1 in acute lymphoblastic leukemia (ALL) patients, we now have two programs specifically designed for the development of the respective hematological malignancies.”
As of the data cut-off date of January 21, 2020 (data availability as of January 28, 2020), 18 patients in the ALEXANDER Phase 1/2 clinical trial of AUTO3 were evaluable for safety and efficacy with minimum 28-day follow-up. In the cohorts dosed at 450 x 106 AUTO3 cells plus pembrolizumab, five out of seven patients (ORR=71%) achieved a response (complete response + partial response) and four out of seven patients (CRR=57%) achieved a complete response. Across all dose levels, seven out of eight complete responders (87%) had ongoing complete responses at a median follow up of six months (range of one month - 18 months). All seven out of seven complete responders (100%) treated with AUTO3 and pembrolizumab have ongoing complete responses as of January 21, 2020 at a median follow up of three months (range of one month - 18 months). AUTO3 was generally well tolerated, with no patients experiencing dose limiting toxicity, and there were no treatment-related deaths. One patient experienced Grade 4 lung infection due to para-influenza virus that was possibly considered to be related to treatment and the patient is recovering. Such infections are a common event in late stage DLBCL patients. No patients experiencing Grade 3 or higher Cytokine Release Syndrome (CRS) were reported with primary treatment (one patient experienced Grade 3 CRS on retreatment), and one of 18 patients experienced a Grade 3 neurotoxicity that resolved swiftly with administration of steroids. As of the data cut-off, no patient has experienced neurotoxicity of any grade in cohorts treated with AUTO3 and pembrolizumab.