SynAct’s new data analysis bolsters case for Phase 3 RA trial
A post-hoc analysis of SynAct Pharma’s Phase 2b ADVANCE study confirms earlier positive results for resomelagon in rheumatoid arthritis (RA), and the company now plans to discuss Phase 3 trial design with the FDA in Q4 2026.
The analysis found that a subgroup of patients experiencing a temporary inflammation flare at enrollment accounted for most of the variability seen in the placebo arm. Among patients with more stable baseline inflammation, ACR20 response rates were 79% for resomelagon 40 mg versus 55% for placebo, echoing earlier EXPAND study results.
“These results give us a clearer basis for designing our Phase 3 trial,” says Thomas Jonassen, Chief Scientific Officer of SynAct.
The company is also evaluating strategic options, including licensing deals or a potential sale, alongside continued development of host-directed therapies for infectious diseases such as dengue.
Published: September 8, 2026
