Abstract
Background
Strategic drug therapy for rheumatoid arthritis (RA) patients with prolonged remission is not well defined. According to recent guidelines, tapering biological Disease Modifying Anti-Rheumatic Drugs (bDMARDs) may be considered. We aimed to evaluate the long-term maintenance of tocilizumab (TCZ) treatment after the progressive tapering of infusions.
Methods
We conducted an exploratory, prospective, single-center, open label study, on RA patients with sustained remission for at least 3 months and treated with TCZ infusions every 4 weeks. The initial re-treatment interval was 6 weeks for the first 3 months. Thereafter, the spacing between infusions was determined by the clinician. Successful long-term maintenance following the tapering of TCZ infusions was defined by patients still treated after two years by TCZ with a minimum dosing interval of 5 weeks.
Results
Thirteen patients were enrolled in the study. Eight out of thirteen were still treated by TCZ after two years. Successful long-term maintenance was possible in six patients, with four patients maintaining a re-treatment interval of 8-weeks or more. We observed 5 patients with TCZ withdrawal: one for adverse drug reaction (neutropenia) and four with secondary failure. Patients achieving successful long-term maintenance with TCZ were significantly younger than those with secondary failure (p<0.05). In addition, RA patients with positive rheumatoid factor and anti-citrullinated peptide antibodies, experienced a significantly greater number of flares during our 2-year follow-up (p<0.01).
Conclusions
A progressive tapering of TCZ infusions seems possible in most of the patients. However, larger studies, including more patients, are needed to confirm this therapeutic option.
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