Jazz Pharmaceuticals and Werewolf Therapeutics Announce Exclusive Global License and Collaboration Agreement to Develop WTX-613, a Differentiated, Conditionally-Activated IFNα INDUKINE™ Molecule

Werewolf to receive $15 million upfront payment, with potential for up to $1.26 billion in development, regulatory and sales milestone payments in addition to royalties on future net sales

WTX-613 expands Jazz's robust oncology pipeline and represents first immuno-oncology program in company's R&D portfolio

DUBLIN, Ireland and CAMBRIDGE, MA, USA I April 7, 2022 I Jazz Pharmaceuticals plc (Nasdaq: JAZZ) and Werewolf Therapeutics, Inc. (Nasdaq: HOWL) today announced that the companies have entered into a licensing agreement under which Jazz has acquired exclusive global development and commercialization rights to Werewolf's investigational WTX-613, a differentiated, conditionally-activated interferon alpha (IFNα) INDUKINE™ molecule.

"We believe WTX-613 has the potential to minimize the toxicity associated with systemic IFNα therapy, preferentially delivering IFNα to tumors, and thereby expanding its clinical utility in treating cancer. We are excited about the potential of WTX-613 based on compelling proof-of-concept data, recently presented at ASH, where a WTX-613 surrogate molecule demonstrated anti-tumor activity in preclinical models," said Rob Iannone, M.D., M.S.C.E., executive vice president, global head of research and development of Jazz Pharmaceuticals. "This transaction underscores our commitment to enhancing our pipeline to deliver novel oncology therapies to patients, and also provides us with an opportunity to expand into immuno-oncology. We will continue to identify and advance promising treatments and novel combinations as we aim to deliver at least five additional novel therapies to patients by the end of the decade as part of our Vision 2025."

WTX-613 is currently in preclinical development. Jazz expects to submit an Investigational New Drug (IND) application to the U.S. Food and Drug Administration (FDA) for WTX-613 in 2023.

"We are thrilled to join forces with Jazz to advance WTX-613 on behalf of patients," said Daniel J. Hicklin, Ph.D., president and chief executive officer of Werewolf. "This partnership comes at an exciting time for Werewolf and enables WTX-613 to rapidly move toward the clinic, while we continue to advance our lead programs, WTX-124 and WTX-330, through expected IND filings this year."

WTX-613 is an engineered IFN2b cytokine pro-drug that is activated specifically within the tumor microenvironment where it can stimulate IFNα receptors on cancer-fighting immune effector cells. The aim of WTX-613 is to minimize the severe toxicities that have been observed with systemically active recombinant IFNα therapy and maximize clinical benefit when administered as monotherapy or in combination with other agents. Type 1 interferon signal transduction by IFNα agonism is a clinically validated mechanism of action, and IFNα has been shown to work synergistically in combination with other proven therapies including immune checkpoint inhibitors, targeted therapies and chemotherapy. This allows for potential application of WTX-613 across a wide range of cancer types, combination regimens and lines of therapy. WTX-613 was created leveraging Werewolf's proprietary PREDATOR™ protein engineering technology, which integrates specialized protein design elements to enhance activity, stability and tumor selectivity within a single molecule, called INDUKINE molecules.

At the American Society of Hematology (ASH) Annual Meeting in December 2021, Werewolf presented data from a surrogate WTX-613 INDUKINE molecule that demonstrated tumor stasis lasting beyond the treatment phase, efficiently blocked tumor growth, activated NK and CD8+ cell responses and induced antigen-presenting cell and effector cell markers in preclinical models.

Transaction Details
Under the terms of the transaction, Jazz has secured exclusive global rights to WTX-613. Jazz will make an upfront payment of $15 million to Werewolf, and Werewolf is eligible to receive development, regulatory and commercial milestone payments of up to $1.26 billion. Pending approval, Werewolf is eligible to receive a tiered, mid-single-digit percentage royalty on net sales of WTX-613.

About Jazz Pharmaceuticals
Jazz Pharmaceuticals plc (NASDAQ: Jazz) is a global biopharmaceutical company whose purpose is to innovate to transform the lives of patients and their families. We are dedicated to developing life-changing medicines for people with serious diseases – often with limited or no therapeutic options. We have a diverse portfolio of marketed medicines and novel product candidates, from early- to late-stage development, in neuroscience and oncology. Within these therapeutic areas, we are identifying new options for patients by actively exploring small molecules and biologics, and through innovative delivery technologies and cannabinoid science. Jazz is headquartered in Dublin, Ireland and has employees around the globe, serving patients in nearly 75 countries. For more information, please visit www.jazzpharma.com and follow @JazzPharma on Twitter.

About Werewolf Therapeutics
Werewolf Therapeutics, Inc. is an innovative biopharmaceutical company pioneering the development of therapeutics engineered to stimulate the body's immune system for the treatment of cancer. We are leveraging our proprietary PREDATOR™ platform to design conditionally activated molecules that stimulate both adaptive and innate immunity with the goal of addressing the limitations of conventional proinflammatory immune therapies. Our INDUKINE™ molecules are intended to remain inactive in peripheral tissue yet activate selectively in the tumor microenvironment. Our most advanced product candidates, WTX-124 and WTX-330, are systemically delivered, conditionally activated Interleukin-2 (IL-2), and Interleukin-12 (IL-12) INDUKINE molecules, respectively, for the treatment of solid tumors. We are continuing preclinical studies for both WTX-124 and WTX-330 and expect to advance each candidate in multiple tumor types as a single agent and in combination with an immune checkpoint inhibitor. To learn more visit www.werewolftx.com.  

SOURCE: Jazz Parmaceuticals

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