Awaiting the potential U.S. FDA approval of a second product this year, Protagonist Therapeutics Inc. with partner Johnson & Johnson won the go-ahead for oral peptide Icotyde (icotrokinra), an IL-23 receptor antagonist, to treat moderate to severe plaque psoriasis in adults and pediatric patients 12 and older who weigh at least 40 kg and who are candidates for systemic therapy or phototherapy.