A Phase 1/2 interventional study of AUTO1 in Relapsed or Refractory B Cell Acute Lymphoblastic Leukemia, sponsored by Autolus Limited. Active, not recruiting at 34 sites in 3 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-04-08.
Sponsored by Autolus Limited · Phase 1/2, Interventional, and Treatment
This is a Phase 1b/2 study to evaluate the safety and efficacy of autologous T cells engineered with a chimeric antigen receptor (CAR) targeting CD19 in adult patients with relapsed or refractory (r/r) B cell acute lymphoblastic leukemia (ALL).
This Phase 1b/2, open-label, multi-center, single arm study is designed to evaluate the safety and efficacy of AUTO1 in adult patients with B-cell ALL by determining the overall response rate (ORR).
Adult patients with r/r ALL will be enrolled in both phases of the study. Consented patients will go through the following five sequential stages: screening, leukapheresis, pre-conditioning, treatment, and follow-up. All patients will receive a total target dose of 410E+6 of CAR T cells as a split dose on Day 1 and on Day 10 (± 2 days).
Autolus Limited is the lead sponsor of 11 studies on the registry; 5 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
ECOG performance status
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Relapsed and refractory
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraindication
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis C tests
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Biological: AUTO1
Following pre-conditioning with chemotherapy (cyclophosphamide and fludarabine) patients will be treated with a total target dose of 410E+6 of CD19-positive CAR T cells as a split dose on Day 1 and on Day 10 (±2 days).
Also known as: Obecabtagene autoleucel (obe-cel)
Phase 1b - Frequency and severity of adverse events (AEs) and serious adverse events (SAEs) occurring after AUTO1 infusion
Time frame: Up to 24 months
Phase 2 - Cohort IIA: ORR defined as proportion of patients achieving CR or CRi as assessed by an IRRC.
Time frame: Up to 24 months
Phase 2 - Proportion of patients achieving MRD-negative CR
Time frame: Up to 24 months
Phase 2 - Complete remission rate
Time frame: Up to 24 months
Phase 2 - Response to AUTO1 treatment measured as duration of remission (DOR)
Time frame: Up to 24 months
Phase 2 - Response to AUTO1 measured as progression-free survival (PFS).
Time frame: Up to 24 months
Phase 2 -Response to AUTO1 treatment measured as overall survival (OS)
Time frame: Up to 24 months
Phase 2 - Frequency and severity of AEs and SAEs
Time frame: Up to 24 months
Phase 2 - Incidence of severe hypogammaglobulinemia
Time frame: Up to 24 months
Phase 2 - Duration of severe hypogammaglobulinemia
Time frame: Up to 24 months
Phase 2 - Detection of CAR T cells measured following AUTO1 infusion
Time frame: Up to 24 months
Started Jun 2020 (actual). Primary completion is estimated for Jun 2029, 108 months after the start.
How these figures are worked out, and which studies are left out of them.
This study is active, not recruiting, as verified in Apr 2026. You cannot join it, but the record below documents what was studied.
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Studies of the drug tested here: Obecabtagene autoleucel
Autolus Limited