announced that its investigational innovative CSF-1R inhibitor pimicotinib（ABSK021） has been granted orphan drug designation（ODD） by the European Medicines Agency (EMA) for the treatment of inoperable tenosynovial giant cell tumor (TGCT).
Following the successful ODD granted by the EMA, the product will benefit from incentives, including protocol assistance, fee reductions, procedural advantages for market authorization, and market exclusivity and so on. In addition to the above-mentioned benefits within the European Union, member states may also offer specific stimuli for orphan drugs.
Previously, in June 2023, pimicotinib was granted the Priority Medicines（PRIME） designation by the EMA, which aims to expedite the review process for promising medicines in areas of unmet medical needs.
In early December 2023, Abbisko entered into an agreement with Merck that granted it an exclusive license to commercialize pimicotinib for all indications in the Chinese mainland, Hong Kong, Macau, and Taiwan. Merck also obtained an exclusive option for global commercial rights of pimicotinib, subject to the terms and conditions as agreed between the parties. Pursuant to the terms of the license agreement, Abbisko will receive a one-time, non-refundable down payment of US$ 70 million. In the event that Merck exercises the global commercialization option, Merck will pay Abbisko an additional option exercising fee. The aggregate amounts of upfront payment, option exercising payment, and payment for development and commercialization milestones will total US$ 605.5 million. Abbisko will also receive double-digit percentage (%) royalties on annual net sales.
Pimicotinib is a novel, orally available, highly selective, and potent small molecule CSF-1R inhibitor, independently developed by Abbisko Therapeutics. It has been granted the Break Through Designation（BTD） and PRIME designation by China NMPA, U.S. FDA, and EMA for the treatment of TGCT patients who are not amenable to surgery. The study is the first global Phase III clinical trial of TGCT conducted simultaneously in China, the U.S., Canada and Europe.
Upon 1-year follow-up in a Phase 1b trial for TGCT, pimicotinib demonstrated an ORR of 87.5% (28/32, including 3 CR) in the 50 mg QD cohort，which was presented at the 2023 CTOS. Pimicotinib has completed a Phase I dose-escalation trial in the U.S. In December this year, it was granted Fast Track Designation (FTD) by the U.S. FDA for the treatment of unresectable TGCT .
In addition to TGCT, Abbisko is actively exploring the potential of pimicotinib in treating other indications including many types of solid tumors in clinic, and it has obtained approval from China NMPA to conduct Phase II clinical studies in chronic graft-versus-host disease (cGVHD) and advanced pancreatic cancer. Up until today, no highly selective CSF-1R inhibitors have been approved in China.
About Abbisko Therapeutics
Founded in April 2016, Abbisko Therapeutics Co., Ltd., a subsidiary of Abbisko Cayman Limited (Stock Code on the Hong Kong Stock Exchange: 2256. HK), is an oncology-focused biopharmaceutical company founded in Shanghai, dedicated to discovering and developing innovative medicines to meet unmet medical needs in China and globally. The Company was established by a group of seasoned drug hunters with rich R&D and managerial expertise from top multinational pharmaceutical companies. Since its founding, Abbisko Therapeutics has built an extensive pipeline of 16 innovative small molecule programs focused on precision oncology and immuno-oncology, including eight clinical stage assets.
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