This is a multi-center, double-blind, placebo-controlled, parallel-group, randomized trial of HuMax-CD4 in the treatment of participants with active RA who have failed treatment with MTX and at least one TNF-alpha blocking agent. Participants are randomized to receive one of two doses of HuMax-CD4 or placebo. The drug will be administered as a subcutaneous infusion (given just under the skin), more often in the beginning and then followed by a maintenance dose. There is a 4 week follow up period, and the final evaluation of the clinical endpoints takes place 26 weeks after treatment start. The trial lasts about 28 weeks in all.
The purpose of this study is to determine whether HuMax-CD4 is effective in the treatment of active RA in participants who have failed treatment with MTX and at least one TNF-alpha blocking agent.