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Research presented at the 2019 ACR/ARP Annual Meeting found that a 6-week treatment with low-dose oral prednisolone substantially improves pain and decreases signs of inflammation in patients with painful hand osteoarthritis.

Studies have previously shown that synovial inflammation is often present in people with hand OA and is a main determinant of both pain and disease progression. But there is still some uncertainty about how to effectively treat this inflammation. The study presented at the 2019 ACR/ARP Annual Meeting – a randomized, double-blind, placebo-controlled trial – examined both efficacy and safety for short-term use of low-dose prednisolone to treat hand OA.

“Hand OA is a common musculoskeletal disease, with a substantial disease-burden in the form of hand pain, functional disability, reduced grip strength and a reduced quality of life. Currently, there is an unmet need for effective therapies for this disease. While several therapeutic options for hand OA are available to alleviate symptoms, the efficacy of these treatments is modest at best,” said Féline Kroon, MD, a rheumatologist in training at Leiden University Medical Centre in the Netherlands and the study’s lead author.

“In this trial, we set out to investigate the efficacy and safety of prednisolone based on observations from previous research that local inflammation seems to play a role in the disease and may be a potential target for treatment.”

The trial enrolled patients with signs of synovial inflammation and who met the American College of Rheumatology criteria for painful hand OA. Patients were eligible for the study if they had all of the following:

• 4 or more osteoarthritic nodes involving interphalangeal joints
• 1 or more interphalangeal joint with soft tissue swelling or erythema
• 1 or more positive power Doppler signal or synovitis of grade 2 or higher

Key exclusion criteria for the trial were patients who had chronic inflammatory rheumatic diseases, psoriasis, use of immune-modulating drugs within 90 days before baseline, or predominant thumb-based pain.

The researchers randomized eligible patients who had visual analogue scale evidence of finger pain (30 mm or more) and patients who flared on non-steroidal anti-inflammatory drug washout (20 mm or more) to receive either prednisolone 10 mg daily for 6 weeks or a placebo. This was followed by a 2-week prednisolone taper, then 6 weeks without study medications. Outcomes were assessed at 2, 4, 6, 8, and 14 weeks.

The trial’s primary endpoint was visual analogue scale finger pain at week 6 in intention-to-treat analysis. The secondary clinical endpoints included fulfillment of the Osteoarthritis Research Society International (OARSI) responder criteria, Australian/Canadian Hand OA Index (AUSCAN) pain and function, Functional Index for Hand OA (FIHOA), visual analogue scale patient global assessment, the Medical Outcomes Study’s Short-Form 36, and grip strength. Imaging endpoints for the trial included both ultrasound evidence of synovitis and positive power Doppler signal.

Ninety-two people were enrolled in the trial, with 46 patients receiving prednisolone and the 46 receiving placebo. In each group, 42 patients completed the trial.

At week 6, 33 patients in the prednisolone group and 15 in the placebo group fulfilled the OARSI responder criteria, and prednisolone was superior to placebo in most other secondary clinical endpoints. In addition, ultrasound synovitis significantly improved at week 6 in the prednisolone group; there was no difference in the power Doppler signal. After drug tapering, between-group differences disappeared. Adverse events were mostly mild for patients in the study, and they were comparable between groups.

“Substantial improvements in pain and function, exceeding effects of currently available therapies, were seen in the trial. Therefore, a short course of 10 mg of prednisolone could be considered a new treatment option for people suffering with hand OA, especially those who experience a flare,” Dr. Kroon said.

“However, it is important to realize that patients included in this study had pain and signs of inflammation and experienced a flare after withdrawal of pain medication, and therefore, these results only pertain to this group of patients. Future studies to investigate the optimal dosage and duration of treatment are warranted.”

Source

Kroon F, Kortekaas M, Boonen A, et al. Six-week Treatment with Low-dose Prednisolone in Patients with Painful Hand Osteoarthritis (HOPE): Results from a Randomized Double-blind Placebo-controlled Trial (Abstract 1760). Presented at the 2019 ACR/ARP Annual Meeting, November 8-13, Atlanta, Georgia.