NCT07139743 · Autolus Limited
Obe-cel in Refractory Progressive Forms of Multiple Sclerosis
(BOBCAT)
What this study is about
The main purpose of this study is to evaluate if obe-cel is safe or causes any side effects in adults with refractory progressive MS. The study also plans to assess if obe-cel can show early signs of effectiveness in MS. The trial includes only 1 group of participants (single-treatment group$1).
View original scientific description
The main purpose of this study is to evaluate if obe-cel is safe or causes any side effects in adults with refractory progressive MS. The study also plans to assess if obe-cel can show early signs of efficacy in MS. The trial includes only 1 group of participants (single-arm). The study population comprises participants with progressive forms of MS, not responsive to highly effective therapies. Upon confirmation of study eligibility, participants will receive chemotherapy (used here for lymphodepletion) over 1 to 3 days in preparation for receiving a single obe-cel infusion. Participants will be checked closely in the 28 days following obe-cel treatment. After this, participants will be monitored to evaluate safety and efficacy up to 24 months.
Interventions
BIOLOGICAL
Obecabtagene autoleucel (obe-cel)
Obecabtagene autoleucel (obe-cel) given as a single infusion.
Primary outcome measures
Percentage of participants receiving obe-cel who experience dose-limiting toxicities (DLTs))
Time frame: Up to Day 28
To evaluate the safety of obe-cel in participants with refractory forms of progressive multiple sclerosis (PMS)
Time frame: Up to end of study
To evaluate the safety of obe-cel in participants with refractory forms of progressive multiple sclerosis (PMS)
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Willing and able to give written informed consent for participation in the study.
- Ability and willingness to adhere to the protocol's Schedule of Activities and other requirements.
- Participants must be 18 to 60 years of age inclusive at the time of signing the informed consent form.
- A female participant is eligible to participate if she is not pregnant or breastfeeding.
- Current diagnosis of PMS.
- Must have been treated previously with 2 disease-modifying therapies.
Exclusion criteria
- Any medications prohibited by the protocol.
- Highly active multiple sclerosis.
- Diagnosis of another autoimmune central nervous system condition.
- Active or uncontrolled fungal, bacterial, viral infection.
- History of malignant neoplasms unless disease-free for at least 24 months.
- History of heart, lung, kidney, liver transplant or hematopoietic stem cell transplant.
Where
- Redwood City, California
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Mar 23, 2026 · Source of record for eligibility and locations