Rheumatoid Arthritis Clinical Trial
Official title:
Phase 1 Trial of CII APL A12 in Rheumatoid Arthritis Patients
This is a Phase I clinical trial to determine whether orally administered APL A12 at one or more doses is superior to placebo in effecting a 25% reduction in interferon (IFN) stimulation index in 1(II)-stimulated culture of peripheral blood mononuclear (PBMC) obtained from patients with Rheumatoid Arthritis (RA), which will be the primary outcome variable. In an effort to learn more about the mechanism of action of APL A12, the investigators will assess Th1/Th2/Th3 cytokine production in supernatants from 48h and 144h cultures of PBMC stimulated by 1(II) and by APL A12 above. The investigators will assess function of CD4+ CD25+ T regs to determine whether APL A12 improves their suppressive function. Flow cytometry combined with intracellular cytokine staining will be used in an effort to determine which T cell subset(s) is/are experiencing shifts in cytokine expression.
The study will have 3 treatment arms each with 10 patients who have demonstrated T cell
immunity to CII and have an in vitro response to APL A12 at the screening visit. Patients
will be randomized to one of the 3 treatment arms. Each of the 3 treatments will be given for
16 weeks.
In keeping with a sequential dose escalation strategy, the originally proposed randomization
scheme will be modified so that subjects will be randomized to receive either the lowest dose
(30 mg) or placebo (Block 1), followed by the next dose (50 mg) or placebo (Block 2). We will
begin with the lowest dose (30 g/day) and enroll 6 to receive 30 g/day APL A12 and 2 to
receive placebo for 16 weeks. Results will be reported to the Data Monitoring Committee (DMC)
for a decision to proceed to the next block based on indications of safety. If this dose does
not cause adverse events or toxicity or worsens RA, we will proceed to enroll patients to
receive 30 ug, or 50 g/day APL A12 or placebo for 16 weeks. A total of 32 subjects will be
randomized to obtain 24 subjects who complete the study. Recruitment was difficult. Only 22
patients were randomized. There were not enough 50mcg patients enrolled so 2 treatment groups
was analyzed. Arm 1 included 30 and 50 mcg and Arm 2 represents the patients that received
placebo.
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