A Phase 1 interventional study of JADE201 and Placebo in Rhematoid Arthritis, sponsored by Jade Biosciences, Inc.. Recruiting at 8 sites in 6 countries. Open to participants aged 18 Years to 70 Years. Per ClinicalTrials.gov, last updated 2026-10-23.
Sponsored by Jade Biosciences, Inc. · Phase 1, Interventional, and Basic science
This is a Phase 1, first in human study to evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of single ascending doses of JADE201 compared to placebo in participants with Rheumatoid Arthritis
This is a multisite, Phase 1, double-blind, placebo-controlled, randomized, first-in-human (FIH), single ascending dose study evaluating the safety, tolerability, pharmacokinetics (PK) and pharmacodynamics (PD) of JADE201 in participants with Rheumatoid Arthritis. Approximately 36 evaluable participants (6 in each cohort) will be enrolled. JADE201 will be administered by a subcutaneous injection. The results of this study will form the foundation for subsequent clinical development of JADE201 in autoimmune indications.
Jade Biosciences, Inc. is the lead sponsor of 5 studies on the registry; 4 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.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
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.
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
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.
Autoimmune disease
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Investigational drug or device
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Subcutaneous (SC) injection of JADE201
Drug: JADE201
Subcutaneous (SC) injection of Placebo
Drug: Placebo
JADE201 is supplied as sterile solution to be administered by SC injection.
Placebo solution to be administered at a matching volume by SC injection.
Safety and Tolerability of Single Ascending Doses of JADE201 in participants with Rheumatoid Arthritis
Incidence of treatment-emergent adverse events
Time frame: Day 1 through 36 weeks
Cmax
Maximum observed serum concentration
Time frame: Day 1 through Weeek 36
Tmax
Time to reach Cmax
Time frame: Day 1 through Week 36
AUClast
The area under the concentration-time curve from time zero to the time of the last observed quantifiable (non-zero) concentration
Time frame: Day 1 through Week 36
T1/2
Apparent first-order terminal elimination half-life
Time frame: Day 1 through Week 36
Plan to share: No
No publications or documents are linked to this record.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
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Jade Biosciences, Inc.