On July 16, 2019 X4 Pharmaceuticals, Inc. (Nasdaq: XFOR), a clinical-stage biopharmaceutical company focused on the development of novel therapeutics for the treatment of rare diseases, and Abbisko Therapeutics, a company with an extensive pipeline of targeted therapeutics with first-in-class or best-in-class potential, reported they have entered into an agreement to develop and commercialize X4’s product candidate, mavorixafor, in combination with checkpoint inhibitors or other agents in Greater China for oncology indications. Mavorixafor is a potentially first-in-class, once-daily, oral, small molecule antagonist of chemokine receptor CXCR4 (Press release, Abbisko Therapeutics, JUL 16, 2019, View Source;article_id=104 [SID1234556282]).

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This agreement provides Abbisko with the exclusive rights in China, Taiwan, Hong Kong and Macau to develop and commercialize maxorixafor in combination with checkpoint inhibitors or other agents in oncology indications – including pancreatic cancer, ovarian cancer and triple negative breast cancer, which will be explored initially. X4 retains full rest-of-world rights to develop and commercialize mavorixafor outside of Greater China for all indications, and the ability to utilize any data generated pursuant to the Abbisko collaboration for rest-of-world development.

"We are pleased to enter into this strategic partnership with the experienced team at Abbisko. This collaboration enables us to leverage Abbisko’s research and development expertise to explore mavorixafor’s potential benefit in advanced cancer patients and to potentially capture value from the growing oncology markets in Greater China, while enabling X4 to maintain its focus on the company’s ongoing rare disease programs," commented Paula Ragan, Ph.D., President and Chief Executive Officer of X4 Pharmaceuticals. "Abbisko’s top-notch investor syndicate, strong leadership with global oncology R&D experience, and broad healthcare network in Greater China provide a complementary opportunity to expand mavorixafor’s potential for patients into solid tumor oncology indications, which represent areas of significant unmet need."

"Mavorixafor has demonstrated proof of concept and a favorable safety profile in a Phase 2 trial in patients with WHIM syndrome, which is caused by compromised immune cell trafficking. We look forward to further realizing mavorixafor’s potential in broad oncology indications in combination with immune checkpoint inhibitors and other therapies, for the benefit of patients with significant unmet medical needs," said Dr. Yaochang Xu, Chief Executive Officer of Abbisko Therapeutics. "Targeting CXCR4 has strong mechanistic rationales in oncology and we believe mavorixafor will bring transformative value to Abbisko’s portfolio with clear synergies with our internal pipeline programs."

About Mavorixafor

X4 Pharmaceutical’s lead product candidate, mavorixafor (X4P-001), is a potentially first-in-class, once-daily, oral inhibitor of CXCR4, currently in Phase 3 development for the treatment of WHIM syndrome, a rare, inherited, primary immunodeficiency disease caused by genetic mutations in the CXCR4 receptor gene. Mavorixafor has demonstrated proof of concept in WHIM in a Phase 2 trial, including clinically meaningful increases in neutrophil and lymphocyte biomarker counts, as well as a trend of reduction in infection rates and wart burden, and a favorable safety profile. Mavorixafor was designated orphan drug status by the U.S. Food and Drug Administration in 2018 for the treatment of WHIM and is also in development for Severe Congenital Neutropenia (SCN), Waldenström’s macroglobulinemia (WM), and clear cell renal cell carcinoma (ccRCC).