A Trial of Prednisolone in Combination With SPI-62 or Placebo in Subjects With Polymyalgia Rheumatica (PMR)

This will be a single-blind, placebo-controlled phase 2 trial to compare prednisolone effects with and without SPI-62 in participants with PMR. Up to 6 cohorts of 12 participants could be recruited (12 to 72 participants). Each participant who provides consent and meets all inclusion and exclusion criteria will participate in 3 periods: a screening period up to 28 days (Day -28 to Day-1), a 4-week treatment period (Day 1 to Day 28) and a follow up Period (Day 29 to Day 56). During the 4-week treatment period for the first cohort, all participants will receive prednisolone 10mg per day for 4-weeks plus SPI-62 for 2-weeks and matching placebo for 2-weeks. For cohorts 2 through 6, the dose of prednisolone co-administered with SPI-62 could be adjusted. For cohorts 5 and 6, the dose of SPI-62 could be adjusted.

Inclusion criteria

• Written informed consent
• Diagnosis of PMR according to EULAR/ACR classification criteria
• Absence of PMR relapse based on symptoms and acute phase markers
• Daily oral prednisolone 10mg dose that will have been stable for at least 1-week at the Baseline visit and is expected to remain stable during the treatment period

Exclusion criteria

• Any contraindication for prednisolone administration.
• A diagnosis or any clinical features of giant cell arteritis.
• Any autoimmune disease (e.g., late-onset rheumatoid arthritis) other than PMR.
• Use of medications for treatment of PMR within specified intervals prior to the Baseline Visit other than oral prednisolone.
• Use of other medications likely to interfere with trial assessments.
• History or diagnosis of endogenous hypercortisolism.
• Any current or prior medical condition, medical or surgical therapies, or clinical trial participation expected to interfere with the conduct of the trial or the evaluation of its results.