New combo therapy for rheumatoid arthritis shows promise in early trial
NCT ID NCT01143337
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tested whether adding an experimental drug called MP-435 to standard methotrexate treatment helps people with rheumatoid arthritis who don't get enough relief from methotrexate alone. 112 adults took either MP-435 or a placebo (dummy pill) plus their usual methotrexate for 12 weeks. The main goal was to see if more people in the MP-435 group had at least a 20% improvement in joint pain, swelling, and daily function. The trial is now complete.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- MP-435 (an experimental drug) plus methotrexate
- What this could lead to
- If it works, this could point toward a new treatment option for rheumatoid arthritis when methotrexate alone isn't enough.
- What could go wrong
- This is an early Phase 2 exploratory study with only 112 people. It may not show enough benefit or could have side effects. Success in this trial does not guarantee a future approved treatment.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Investigational site
Osaka, Japan
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