A Randomized, Double-blind, Placebo-controlled Clinical Study of the Oral IL-12/23 Inhibitor, STA-5326 Mesylate, Administered to Patients With Rheumatoid Arthritis to Determine Safety, Tolerability, Pharmacokinetic and Synovial Tissue Outcomes

Synta Pharmaceuticals

Status and phase

Completed

Phase 2

Conditions

Active, Moderate to Severe Rheumatoid Arthritis

Treatments

Drug: Placebo

Drug: STA 5326 mesylate

Study type

Interventional

Funder types

Industry

Identifiers

NCT00642629

5326-09

Details and patient eligibility

About

It is not fully clear how rheumatoid arthritis originates and develops, but it is understood that multiple genetic and environmental factors interact to trigger its onset. The immune system attacks the joint synovium, which damages the cartilage and bone in the joint by increasing the number of inflammatory cells and forming new blood vessels in the joint space. STA-5326 mesylate inhibits the production of IL-12 and IL-23 and therefore may inhibit Th-1 cytokine production. A reduction in the Th-1 response has the potential to minimize or eliminate joint damage caused by the immune response in rheumatoid arthritis. This study is designed to assess whether the proposed mechanism of action is associated with a reduction in inflammation in the synovium of patients who have rheumatoid arthritis.

Enrollment

35 estimated patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Male or female 18 years of age or older.
Has a diagnosis of RA in conformance with the American College of Rheumatology (ACR) criteria for at least 6 months.
Has at least one knee, wrist, or ankle that has active synovitis and is amenable to arthroscopic procedures for the acquisition of synovial tissue via biopsy.
Must be taking methotrexate for a minimum of 4 months prior to Day 1, with a stable dose regimen for at least 2 months, and
have plans to remain on the stable dose regimen of methotrexate for the duration of this study.
If female of childbearing potential, must be neither pregnant nor breast feeding, and
must have a negative pregnancy test (serum β-hCG) within 1 week of Day 1. Must be willing to use "double-barrier" contraception methods for the duration of the study.

Exclusion criteria

Is taking any disease-modifying anti-rheumatic drug (DMARD) other than MTX concomitantly or within 1 month prior to Day 1.
A positive (≥10 mm) tuberculin (PPD) skin test, unless the patient has had prior BCG immunization or has received prior suppressive treatment such as 1 year of INH.
Has received any investigational drug or experimental procedure for the treatment of RA within 3 months of Day 1 for a biologic compound or within 1 month of Day 1 for a non-biologic compound.
Has any clinically significant disease (e.g., renal, hepatic, neurological, cardiovascular, pulmonary, endocrine, psychiatric, hematologic, urologic, or other acute or chronic illness) that, in the opinion of the investigator, would make the patient an unsuitable candidate for this trial.