Spyre Therapeutics (SYRE) said its experimental rheumatoid arthritis drug SPY072 failed to meet the company's internal performance threshold needed to justify further stand-alone development, prompting the halt of its monotherapy RA program.
The drug delivered statistically significant improvements over placebo on several efficacy measures and showed a tolerable safety profile with no drug-related serious adverse events, the company said Tuesday in a statement.
Spyre said it will now evaluate SPY072 in combination regimens and in other autoimmune indications, with additional clinical readouts expected in Q4.
Spyre shares fell 12% in after-hours trading.