Zasocitinib (TAK-279) meets primary and secondary endpoints in Phase 3 plaque psoriasis studies

Takeda has announced positive topline results for the two Latitude Phase 3 active comparator-controlled studies of zasocitinib (TAK-279), a highly selective oral tyrosine kinase 2 (TYK2) inhibitor, in adults with moderate-to-severe plaque psoriasis (PsO). The results showed that approximately 30 percent of patients achieved complete skin clearance (PASI 100) by week 16 and more than half reached near-complete clearance (PASI 90). All primary and 44 ranked secondary endpoints in patients with PsO were met. Zasocitinib was generally well-tolerated, and the safety and tolerability profile remained consistent with prior studies.

The Latitude Phase 3 psoriasis studies are global, multicenter, randomized, double-blind, placebo- and active comparator-controlled studies to evaluate the efficacy, safety and tolerability of zasocitinib in adult patients with moderate-to-severe plaque psoriasis (PsO).

The studies demonstrated superiority of zasocitinib compared to placebo for the co-primary endpoints, static Physician Global Assessment (sPGA) 0/1 and Psoriasis Area and Severity Index (PASI) 75, at week 16, with a significantly greater PASI 75 response rate seen from week 4 and continuing to increase through week 24.

The studies also met all 44 ranked secondary endpoints, including PASI 90, PASI 100 and sPGA 0 against placebo and apremilast, showing the potential of a once-daily pill to deliver complete skin clearance for patients with PsO.

Favorable safety and tolerability profile

Zasocitinib was generally well-tolerated. The safety and tolerability profile of zasocitinib in the Phase 3 studies remained consistent with prior studies, including the Phase 2b plaque psoriasis study. The most common adverse events through week 24 were upper respiratory tract infection, nasopharyngitis and acne, with no new safety signals identified.

- Plaque psoriasis is a chronic, immune-mediated disease that can significantly impact patients’ quality of life. While treatment options have advanced, there is still a need for innovative approaches that offer sustained disease control and help alleviate the overall burden of disease. It is encouraging to see the Phase 3 data suggesting that highly selective inhibition of TYK2 may represent a relevant treatment pathway for people living with psoriasis, reflecting our ongoing efforts to address areas of unmet medical need, said Saija Silvola, Nordic Medical Director at Takeda.

Takeda intends to present the results at upcoming medical congresses and plans to submit a New Drug Application with the United States Food and Drug Administration and other regulatory authorities starting in fiscal year 2026.

Zasocitinib is also being evaluated in a head-to-head study against deucravacitinib in plaque psoriasis, Phase 3 studies in psoriatic arthritis and Phase 2 studies in Crohn’s disease and ulcerative colitis, among other indications.^1-6 Results from the Phase 3 studies have no significant impact on the full-year consolidated forecast for the fiscal year ending March 31, 2026.

About Plaque Psoriasis

Psoriasis is a chronic immune-mediated inflammatory disease in which the body’s immune system causes inflammation which results in skin cells that multiply too quickly.⁷ Plaque psoriasis, the most common form of psoriasis, is characterized by raised, red, gray or purple patches of skin that are itchy, painful and covered by scales.^8-10 Psoriatic plaques can cover any part of the skin surface but are mostly found on the scalp, face, arms and elbows, legs, knees, torso, genitals, nails and in skin folds.^7,11 Many people living with psoriasis experience intense itching and burning from their psoriasis plaques that disrupt their daily lives.^9,10 Patients also report that their symptoms negatively impact their mental health and quality of life and can lead to social isolation.¹² Globally, an estimated 64 million people are living with psoriasis and about 80-90% of those have plaque psoriasis.^13,14

About Zasocitinib (TAK-279)

Zasocitinib is an investigational, highly selective oral TYK2 inhibitor that maintains 24-hour inhibition of IL-23 plus other core disease-driving immune pathways.^15,16. Zasocitinib has more than 1-million-fold greater selectivity for TYK2 compared to other JAK enzymes, which could maximize TYK2 inhibition without impacting JAK1, 2 and 3 signaling, based on in vitro data.^15,17Takeda is currently evaluating the safety and efficacy of zasocitinib in a head-to-head study against deucravacitinib in plaque psoriasis and in Phase 3 studies in psoriatic arthritis. In addition, Phase 2 studies are ongoing in Crohn’s disease, ulcerative colitis and vitiligo, and being initiated in hidradenitis suppurativa (HS).^1-6 Zasocitinib is an investigational compound that has not been approved for use by any regulatory authority.

About the LATITUDE Psoriasis Phase 3 Studies

The Latitude Phase 3 psoriasis studies (NCT06088043 and NCT06108544) are global, multicenter, randomized, double-blind, placebo- and active comparator-controlled studies to evaluate the efficacy, safety and tolerability of zasocitinib in adult patients with moderate-to-severe plaque psoriasis.^18,19 The studies were conducted in 21 countries and enrolled 693 and 1,108 participants, respectively. The co-primary endpoints were the proportion of zasocitinib-treated patients achieving sPGA 0/1 and PASI 75 response compared to placebo at week 16.^18,19 Ranked (key) secondary endpoints included comparisons versus placebo (week 16) and apremilast (week 16 and week 24).^18,19

About Tyrosine Kinase 2 (TYK2) Inhibitors

TYK2 is an intracellular enzyme and member of the Janus kinase (JAK) protein family.^17,20,21 However, TYK2 is distinct from JAK1, 2 and 3 as it primarily regulates immune responses, whereas JAK1, 2 and 3 regulate broader biological processes. ^17,20,21 TYK2 mediates IL-23 plus other immune and inflammatory signaling pathways that are fundamental to psoriasis, psoriatic arthritis and other immune-mediated inflammatory diseases.²² Highly selective allosteric inhibition of TYK2, with minimal inhibition of JAK1, 2 and 3, may be a promising therapeutic approach to target immune-mediated inflammation while potentially avoiding risks associated with inhibition of other members of the JAK family.²³

For more information, please contact:

Henry Werner, Head of Communications Nordics and Sweden at Takeda
Henry.Werner@takeda.com

References:

1. A Study Comparing Zasocitinib (TAK-279) With Deucravacitinib in Adults With Plaque Psoriasis. ClinicalTrials.gov Identified: NCT06973291. Updated December 17, 2025. Accessed December 2025.https://clinicaltrials.gov/study/NCT06973291.
2. Study of Zasocitinib in Adults With Psoriatic Arthritis Who Have Not Taken Biologic Medicines. ClinicalTrials.gov Identifier: NCT06671483. Updated December5, 2025. Accessed December 2025. https://clinicaltrials.gov/study/NCT06671483?cond=Psoriatic%20Arthritis&term=tak-279&rank=2
3. A Study of Zasocitinib in Adults With Psoriatic Arthritis Who Have or Have Not Been Treated With Biologic Medicines. ClinicalTrials.gov Identifier: NCT06671496. Updated December5, 2025. Accessed December 2025. https://clinicaltrials.gov/study/NCT06671496?cond=Psoriatic%20Arthritis&term=tak-%20279&rank=1.
4. https://clinicaltrials.gov/study/NCT06973291A Study on the Safety of TAK-279 and Whether it Can Reduce Inflammation in the Bowel of Participants With Moderately to Severely Active Crohn's Disease. ClinicalTrials.gov Identifier: NCT06233461. Updated December 17, 2025. Accessed: December 2025. https://clinicaltrials.gov/study/NCT06233461.
5. A Study on the Safety of TAK-279 and Whether it Can Reduce Inflammation in the Bowel of Participants With Moderately to Severely Active Ulcerative Colitis. ClinicalTrials.gov Identifier: NCT06254950. Updated November 21, 2025. Accessed: December 2025. https://www.clinicaltrials.gov/study/NCT06254950.
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