Protagonist Therapeutics Inc. got a win in its phase IIb study and is making plans for a phase III. JNJ-2113 (formerly PN-235), an oral, interleukin-23 receptor antagonist peptide, hit its primary efficacy endpoint in treating moderate to severe plaque psoriasis. A statistically significant greater proportion of the participants receiving JNJ-2113 saw a 75% improvement in their skin lesions compared to placebo at week 16.