Authors: Elise Doaré, François Robin, Hélène Racapé, Guillaume Le Mélédo, Charles Orione, Pascal Guggenbuhl, Philippe Goupille, Elisabeth Gervais, Emmanuelle Dernis, Béatrice Bouvard, Thierry Marhadour, Guillaume Coiffier & Alain Saraux
Abstract
Objectives
The usual treatments for crystal-associated arthritis are sometimes contraindicated; thus, new therapies against interleukin-1beta (IL-1) have been developed. We evaluated the characteristics of patients who received biological treatment for crystal-associated arthritis.
Patients and Methods
We conducted a multicentric retrospective observational study in six rheumatology units in western France. Patients receiving a biological treatment for crystal-associated arthritis between 1 January 2010 and 31 December 2018 were included. Improvement was defined as at least a 50% decrease in the count of synovitis and C-reactive protein level.
Results
Forty-six patients were included: 31 (67.4%) were treated for gouty arthritis, and 15 (32.6%) for calcium pyrophosphate crystal deposition disease (CCPD). The first biotherapy used was anakinra for 14 patients (93.3%) with CCPD and 31 patients (100.0%) with gout. The first biotherapy course was more efficient in treating gout than in treating CCPD, with success in 28 patients (90.3%) and 5 patients (35.7%), respectively (p = 0.001). Six patients (42.9%) with CCPD stopped their first biotherapy course because of side effects. Among the patients with gout, urate-lowering therapy was more frequently used after (100%) than before the first biotherapy course (67.7%) (p = 0.002).
Conclusion
Anakinra was prescribed for cases of refractory crystal-associated arthritis or cases with contraindications for usual treatments. The efficacy of anakinra in treating CCPD was not obvious. Patients with CCPD had more side effects. The biotherapy was introduced with a long-term objective, while anti-IL-1 therapies are approved for acute crises only.
Key Summary Points |
| Anakinra is prescribed for cases of refractory crystal-associated arthritis or contraindications to usual treatments |
| The efficacy of anakinra in treating calcium pyrophosphate crystal deposition disease is not obvious |
| Anakinra is the most prescribed therapeutic, and its efficiency in treating gout was high |
| Anti-IL-1 therapies are generally introduced with a long-term objective |