In a recent study, Idera Pharmaceuticals reported that 48 percent of patients with moderate-to-severe plaque psoriasis (12 of 25) treated with IMO-3100, a selective antagonist of Toll-like Receptors (TLRs) 7 and 9, demonstrated improvements in Psoriasis Area Severity Index (PASI) scores of 35 percent to 90 percent from baseline. The study was a randomized, double-blind, placebo-controlled Phase 2a clinical trial of two dose levels of IMO-3100 administered for four weeks, with a four-week follow-up period. None of the 12 placebo-treated patients had improvement in this range; this difference was statistically significant (p<0.005). The company believes the results of this trial provide clinical proof-of-concept for the mechanism of action of selective TLR inhibition in patients with psoriasis and potentially other autoimmune and inflammatory disorders.