NCT06201416 · Sonoma Biotherapeutics, Inc.
Study of Single Doses of SBT777101 in Subjects With Rheumatoid Arthritis
(Regulate-RA)
What this study is about
This study will test the safety and effects of SBT777101 when given as a single dose to subjects with rheumatoid arthritis. It is the first study of this treatment being done in humans. Increasing dose levels will be given after the safety at lower dose levels is shown.
View original scientific description
This study will test the safety and effects of SBT777101 when given as a single dose to subjects with rheumatoid arthritis. It is the first study of this treatment being done in humans. Increasing dose levels will be given after the safety at lower dose levels is shown. Following completion of the initial single ascending dose cohorts, the study may evaluate alternative administration regimens of SBT777101, including split-dose administration. In the split-dose cohort, participants may receive two intravenous infusions of SBT777101 derived from a single manufacturing process, administered approximately 6 weeks apart. The study will continue to evaluate safety, tolerability, pharmacokinetics, pharmacodynamics, and preliminary clinical activity.
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
- Body mass index (BMI) \<35 kg/m\^2, inclusive
- Adult-onset, moderate-to-severe rheumatoid arthritis (RA)
- Moderate-to-severe active disease
- b/tsDMARD failure criterion (≥2)
- Swollen joint count ≥4
- Clinical and/or ultrasound evidence of synovitis
- Prior inadequate response to or unable to tolerate available RA therapies
- Stable doses of RA medications for at least 30 days
- Use of highly effective methods of contraception
Exclusion criteria
- Major surgery within 12 weeks prior to screening or planned within 12 months after dosing
- Uncontrolled cardiovascular, pulmonary, renal, hepatic, endocrine, or gastrointestinal disease
- Recurrent infections or active infection
- Active or untreated latent tuberculosis
- Primary or secondary immunodeficiency
- History of or current inflammatory joint disease other than RA
Where
- Scottsdale, Arizona
- San Francisco, California
- Stanford, California
- Aurora, Colorado
- Chicago, Illinois
- Boston, Massachusetts
- Portland, Oregon
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 Jun 30, 2026 · Source of record for eligibility and locations