A Study to Assess the Receptor Occupancy of CD86 and CD80 in Subjects With Rheumatoid Arthritis Initiating Abatacept

A Phase 0, Open-Label, Multi-Center, Observational Study to Assess the Receptor Occupancy of CD86 and CD80 in Subjects With Rheumatoid Arthritis Initiating Abatacept

The purpose of this study is to characterize CD86 receptor occupancy in subjects with rheumatoid arthritis (RA) receiving abatacept.

Inclusion Criteria:

• Subject has rheumatoid arthritis (RA), is both abatacept- and belatacept-naïve, and is an eligible candidate to start a course of treatment with abatacept in accordance with the product label
• Subject is willing and able to comply with study visits and procedures