Kymera Therapeutics Announces First Patient Dosed in Phase 2 Hidradenitis Suppurativa Clinical Trial of KT-474 (SAR444656), a First-in-Class, Investigational IRAK4 Degrader, Generating $40 Million Payment from Sanofi - Seite 2

About KT-474

KT-474 is an oral IRAK4 degrader, in development for the treatment of IL-1R/TLR-driven complex inflammatory diseases where there is an opportunity to significantly advance the standard of care, including HS and AD. In the Phase 1 trial, KT-474 showed evidence of robust IRAK4 degradation in the blood and active skin lesions of HS and AD patients and was generally well tolerated. Treatment with KT-474 was associated with a systemic anti-inflammatory response and improvement in skin lesions and symptoms in both HS and AD patients, with internal consistency between the effect on inflammatory biomarkers and impact on clinical endpoints. KT-474 was generally safe and well-tolerated, with no serious adverse events, no drug-related infections, and no dose interruptions or discontinuations due to adverse events.

The safety and efficacy of KT-474 (SAR444656) is currently being evaluated in double blind, placebo-controlled, randomized Phase 2 clinical trials in adult patients with moderate to severe HS and AD. Sanofi, which is collaborating with Kymera on the development of KT-474 outside of the oncology and immune-oncology fields, is conducting the Phase 2 studies.

More information on the Phase 2 studies in HS (NCT06028230) and AD (NTC06058156) can be found at www.clinicaltrials.gov.

About Hidradenitis Suppurativa
Hidradenitis suppurativa (HS) is a chronic inflammatory skin disease that causes painful lumps deep in the skin. It results in painful nodules and abscesses that can persist and worsen over time. It can affect daily life and emotional well-being, especially as the disease progresses. HS tends to start after puberty, usually before age 40. There are no FDA approved oral treatments for HS.

About Kymera Therapeutics
Kymera is a biopharmaceutical company pioneering the field of targeted protein degradation, a transformative approach to address disease targets and pathways inaccessible with conventional therapeutics. Kymera’s Pegasus platform is a powerful drug discovery engine, advancing novel small molecule programs designed to harness the body’s innate protein recycling machinery to degrade dysregulated, disease-causing proteins. With a focus on undrugged nodes in validated pathways, Kymera is advancing a pipeline of novel therapeutic candidates designed to address the most promising targets and provide patients with more effective treatments. Kymera’s initial programs target IRAK4, IRAKIMiD, and STAT3 within the IL-1R/TLR or JAK/STAT pathways, and the MDM2 oncoprotein, providing the opportunity to treat patients with a broad range of immune-inflammatory diseases, hematologic malignancies, and solid tumors.