Updated data from the ALLCAR study suggests AUTO1’s potential for transformational activity in adult patients with r/r ALL

LONDON, UK I December 05, 2020 I Autolus Therapeutics plc (Nasdaq: AUTL), a clinical-stage biopharmaceutical company developing next-generation programmed T cell therapies, today announced new data highlighting progress on its AUTO1 program, the company’s CAR T cell therapy being investigated in the ongoing ALLCAR Phase 1 study in relapsed / refractory adult B-Acute Lymphocytic Leukemia (ALL), during the American Society of Hematology (ASH) All-Virtual Annual Meeting, held between December 5-8, 2020.

As of the November 12, 2020 data cut-off date, 20 patients with r/r ALL had received AUTO1. AUTO1 was well tolerated, with no patients experiencing ≥ Grade 3 cytokine release syndrome (CRS). Three patients (15%), all of whom had high leukemia burden (>50% blasts), experienced Grade 3 neurotoxicity (NT) that resolved swiftly with steroids.

Of the 19 patients evaluable for efficacy, 16 (84%) patients achieved minimum residual disease (MRD)-negative complete response (CR) at one month. Most notably, the durability of remissions is highly encouraging. Across all treated patients, event free survival (EFS) at six and 12 months is 69% and 52% respectively. Median EFS and overall survival (OS) has not been reached at a median follow up of 16.9 months (range up to 30.5 months).

“The high level of sustained CRs observed with AUTO1 in adult ALL, achieved without subsequent stem cell transplant, point to a potentially transformational treatment for adult ALL,” said Dr. Claire Roddie, Consultant Hematologist, UCL Cancer Institute and University College London Hospital. “Despite high disease burden and despite this being a heavily pre-treated patient population on study, AUTO1 remains well tolerated. It’s encouraging to also observe promising early activity and safety in indolent NHL.”

“Adult ALL is a disease with high unmet need, whereby approximately 60% of patients relapse or are refractory to first line therapy,” said Dr. Elias Jabbour, Professor of Leukemia at The University of Texas MD Anderson Cancer Center. “AUTO1 is a novel CD19 CAR T candidate with an impressive clinical profile.  This profile has the potential to change standard of care as a curative therapy for r/r ALL.”

Dr. Christian Itin, chairman and chief executive officer of Autolus, added “We are excited about the long-term remissions observed without a need for an additional stem cell transplant. Remarkably, this outstanding result was achieved with a well-tolerated safety profile in this fragile adult ALL population. We believe the unique characteristics of AUTO1, seen in the ALLCAR study, point to the potential for AUTO1 as a standalone and transformational therapy in r/r ALL. Our Phase 1b/2 pivotal study is under way, however, with the escalating COVID-19 pandemic, enrolment projections have had to be adjusted. We now expect to enroll patients throughout 2021 with a full data set in 2022.”

In addition to adult ALL, the ALLCAR study was extended to patients with indolent B cell Non-Hodgkin Lymphoma (NHL) (Cohort 1), high grade B-NHL (Cohort 2) and chronic lymphocytic leukemia (CLL) (Cohort 3). As of the data cut-off date of November 12, 2020, four patients in Cohort 1 had been infused with AUTO1. AUTO1 was well tolerated, with no patients experiencing ≥ Grade 2 CRS and no patients experiencing NT of any grade. All four patients achieved a Complete Metabolic Response (CMR).

About Autolus Therapeutics plc
Autolus is a clinical-stage biopharmaceutical company developing next-generation, programmed T cell therapies for the treatment of cancer. Using a broad suite of proprietary and modular T cell programming technologies, the company is engineering precisely targeted, controlled and highly active T cell therapies that are designed to better recognize cancer cells, break down their defense mechanisms and eliminate these cells. Autolus has a pipeline of product candidates in development for the treatment of hematological malignancies and solid tumors. For more information please visit www.autolus.com.

About AUTO1 
AUTO1 is a CD19 CAR T cell investigational therapy designed to overcome the limitations in safety – while maintaining similar levels of efficacy – compared to current CD19 CAR T cell therapies. Designed to have a fast target binding off-rate to minimize excessive activation of the programmed T cells, AUTO1 may reduce toxicity and be less prone to T cell exhaustion, which could enhance persistence and improve the ability of the programmed T cells to engage in serial killing of target cancer cells. AUTO1 is currently being evaluated in two Phase 1 studies, one in pediatric ALL and one in adult ALL. The company has also now progressed the program to a potential pivotal study, AUTO1-AL1.

About AUTO1-AL1 pivotal study
The AUTO1-AL1 study will enroll patients with relapsed / refractory ALL. The study will have a short Phase1b component prior to proceeding to a single arm Phase 2 study. The primary end point is overall response rate and the key secondary end points include duration of response, MRD negative CR rate and safety. The study will enroll approximately 100 patients across 30 of the leading academic and non-academic centers in the US, UK and Europe.

SOURCE: Autolus Therapeutics