On September 6, 2018 BeiGene, Ltd. (NASDAQ: BGNE; HKEX: 06160), a commercial-stage biopharmaceutical company focused on developing and commercializing innovative molecularly-targeted and immuno-oncology drugs for the treatment of cancer, and SpringWorks Therapeutics, a clinical-stage rare disease and oncology company focused on sourcing and developing innovative treatments for underserved patient populations, reported that the companies have entered into a global clinical collaboration agreement to evaluate the safety, tolerability and preliminary efficacy of combining BeiGene’s investigational RAF dimer inhibitor, lifirafenib (BGB-283) and SpringWorks Therapeutics’ investigational MEK inhibitor, PD-0325901, in patients with advanced solid tumors (Press release, BeiGene, SEPT 6, 2018, View Source;p=irol-newsArticle&ID=2366390 [SID1234529325]). Under the terms of the agreement, BeiGene will be responsible for administering the Phase 1b clinical trial that is expected to commence during the first quarter of 2019 in patients with advanced solid tumors that harbor RAS, RAF mutations and other MAPK pathway aberrations, with all costs of the clinical studies and governance responsibilities to be shared equally among both parties. SpringWorks Therapeutics will also oversee fixed-dose formulation work as part of the collaboration.
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"BeiGene is committed to developing innovative medicines for cancer patients with little or no treatment options. We are delighted to work with SpringWorks Therapeutics to explore the potential benefits of this combination in patients with RAS mutations, a patient population with high unmet medical needs," said John V. Oyler, co-founder, chief executive officer and chairman of BeiGene.
"Mutations in RAS genes are found in roughly one-fourth of all human cancers, making this a critically important area for developing new cancer treatments. Despite decades of research, no anti-RAS therapies have been approved to date," said Saqib Islam, chief executive officer of SpringWorks Therapeutics. "The combination of a MEK inhibitor with a RAF dimer inhibitor has strong scientific rationale, and we look forward to partnering with BeiGene to build upon the existing preclinical data, which have demonstrated potential benefits with this combination therapy approach."
About Lifirafenib
Lifirafenib was discovered in BeiGene’s research facilities in Beijing, China, and is an investigational small molecule kinase inhibitor with RAF monomer and dimer inhibition activities. Lifirafenib has shown antitumor activities in preclinical models and in cancer patients with tumors harboring BRAF V600E mutations, non-V600E BRAF mutations, non-small cell lung cancer and endometrial cancer harboring KRAS mutations. To date, lifirafenib has been dosed in more than 150 patients globally.
About PD-0325901
PD-0325901 was originally discovered by Pfizer scientists and is an inhibitor of MEK, a key signaling protein for cellular survival and proliferation. PD-0325901 has been shown in clinical biopsies to block MEK phosphorylation, thereby arresting cellular growth and causing cell death to occur. Preclinical models have demonstrated significant synergy between MEK and RAF inhibition in RAS-mutant solid tumors. By vertically inhibiting the MAPK pathway, the combination approach of PD-0325901 and lifirafenib may potentially overcome feedback loops that have impeded therapeutic development for RAS-mutant solid tumors.
SpringWorks Therapeutics also plans to initiate a Phase 2b study of PD-0325901 as monotherapy for neurofibromatosis type 1 patients with plexiform neurofibromas in 2019. The company is also continually evaluating new licensing and partnership opportunities for its MEK program and is seeking other innovative partnerships designed to complement the existing clinical programs to advance its ambition of developing novel therapies for underserved patient populations.