Pharmaceutical 25 March 2025 California-based clinical stage biotech Alumis today announced a collaboration and licensing agreement with Japan’s Kaken Pharmaceutical to develop, manufacture and commercialize ESK-001, a highly selective, next-generation oral tyrosine kinase 2 (TYK2) inhibitor, for dermatology indications in Japan, with the option to expand the license to include rheumatological and gastrointestinal diseases.