At a contentious meeting with possible implications for other rare disease drugmakers, outside experts ultimately determined that Capricor didn't prove deramiocel's benefits in Duchenne-related cardiomyopathy.

Ahead of a hearing, the FDA raised questions about the benefits of a Duchenne treatment from Capricor Therapeutics, another twist for the rare disease drug.

Agency says deramiocel did not meet phase III trial endpoints, contrary to reported data