RITUXIMAB (MABTHERA®) - TREATMENT OF RHEUMATOID ARTHRITIS PATIENTS WITH INADEQUATE RESPONSE TO TNF INHIBITORS - WHEN TO CHANGE THERAPY?
Authors:
Jadranka Morović-Vergles
Summary
B cells play a critical role in the pathogenesis of rheumatoid arthritis. Recently, a number of biological agents that target B cells have been tested as therapies for these conditions. Of this group of agents, the first in clinical use has been rituximab, a chimeric monoclonal antibody that depletes B cells by binding to the CD20 cell-surface antigen. 25-40% of patients treated with a TNF inhibitor fail to achieve adequate response. A treatment response is inadequate if low disease activity or remission is not achieved. Treatment of patients with inadequate response to TNF inhibitors represents a challenge. What are the options? Switch to another anti-TNFα agent or initiate treatment with a biological agent with a different mechanism of action? In patients with persistent active disease despite anti-TNFα therapy, treatment with rituximab may be more effective than switching to another anti-TNFα.