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Abstract Number: 135

A Pilot Study of the Efficacy of IL1 Blockade by Anakinra in Acute Calcific Periarthritis of the Rotator Cuff

Pascal Zufferey1, Melanie Faucherre2, Pierre A. Varisco1, Berengere Aubry Sr.1, Isabelle Fabreguet3 and Alexander K. So Sr.1, 1Dal/Rhu, CHUV, Lausanne, Switzerland, 2Dal /Rhu, CHUV, Lausanne, Switzerland, 3CHUV, Lausanne, Switzerland

Meeting: 2012 ACR/ARHP Annual Meeting

Keywords: Anakinra, crystal-induced arthritis and shoulder disorders

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Session Information

Title: Metabolic and Crystal Arthropathies

Session Type: Abstract Submissions (ACR)

Background/Purpose: Calcific periarthritis of rotator cuff can induce acute and severe shoulder pain and is accompnied by signs of acute inflammation.  The calcific deposits are composed of calcium phosphate crystals such as hydroxyapatite or basic calcium phosphate. These crystals stimulate the production and release of IL1b from macrophages, in an analogous manner to MSU and CPPD crystals.  As IL1 blockade is effective in reducing signs and symptoms of inflammation in acute gout, we performed a pilot study to study if it is also effective in calcific periarthritis

Methods: 5 consecutive patients were included (mean age: 62, 3 females, 2 males) between March 2011 and March 2012. Symptoms of acute shoulder pain at rest had to be present for <7 days before inclusion,  associated with limitation of shoulder mobility and the presence on calcification in the rotator cuff by conventional radiography. None of the patients had responded to at least 48 hours of high doses of NSAIDs. Exclusion criteria included no corticosteroid therapy in the last 2 weeks and the exclusion of other rheumatologic or infectious diseases.Clinical evaluation consisted of patient assessment of pain (total, rest and activity) by VAS (100mm scale) at days 0, 1, 3, 15, 42 and clinical examination of shoulder mobility at days 0, 3, 15.  ESR and CRP were measured at days 0, 3. Plain radiographs were performed at days 0 and 15 and an ultrasound examination (including Doppler) was performed at days 0, 3, 15. Anakinra 100mg daily was administered for 3 consecutive days after the first evaluation (day 0). Rescue analgesics were allowed and recorded.

Results: At inclusion, all patients had severe shoulder pain: mean (SD) VAS day pain of 72mm (±25mm), mean VAS night pain of 96 (± 5) and impaired shoulder mobility. CRP was elevated in all of them (mean of 3X). Treatment with anakinra lead to rapid relief of pain in all patients, starting already on the first night following the first injection. The reduction of VAS pain was particularly striking for rest pain:  mean (SD) VAS of 4mm (± 5) at day 1 and this response was maintained for the 5 patients at the end of the three injections without any need of rescue medication. Mean rest VAS was 6 (±8) at day 3. The effect on day pain was less spectacular: mean (SD) VAS at D1 of 30 (± 18), at D3 of 27 (± 11). Shoulder mobility also improved and the CRP normalized in 4 of 5 patients at day 3. At day 42, 4 of 5 the patients were still totally asymptomatic.On X rays and US, the calcifications were reduced in size: mean maximal diameter of 21 mm at day 0 to 12 mm at day 15, but did not disappear in any patient. The main change on US was a significant and rapid (at day 3) reduction of Doppler activity around the calcification.

Conclusion: This pilot open study suggests that IL-1β inhibition may be an interesting therapeutic approach in acute calcific periarthritis, especially in patients who have not responded adequately to NSAIDs.  The effect on pain seems to be more rapid (within a few hours) than steroid injection although a randomized controlled study needs to be performed to confirm this observation


Disclosure:

P. Zufferey,
None;

M. Faucherre,
None;

P. A. Varisco,
None;

B. Aubry Sr.,
None;

I. Fabreguet,
None;

A. K. So Sr.,

Amgen,

6.

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