Group 1 - The core agreement involves a strategic collaboration between Xiansheng Pharmaceutical's subsidiary Xiansheng Zaiming and US biopharmaceutical company NextCure for the development and commercialization of the antibody-drug conjugate (ADC) SIM0505, targeting CDH6, with a total potential payment of up to $745 million [2][5] - SIM0505 is positioned as a novel ADC with a proprietary TOPO inhibitor payload, showing strong anti-tumor effects in preclinical studies and a high systemic clearance rate, indicating potential for an expanded therapeutic window [3][4] - The collaboration includes a unique bidirectional technology partnership, allowing NextCure to utilize Xiansheng Zaiming's proprietary ADC linker and TOPO inhibitor payload for its own ADC development, while Xiansheng Zaiming retains rights for this new ADC in Greater China [4] Group 2 - The $745 million deal marks a significant milestone in Xiansheng Pharmaceutical's strategy for international expansion and highlights the successful global outreach of Chinese innovative drugs through business development (BD) models [5] - The collaboration underscores the international recognition of Chinese pharmaceutical companies' capabilities in cutting-edge technologies like ADCs, with Xiansheng Zaiming's proprietary payload being noted for its potential superior safety and efficacy compared to other topoisomerase inhibitors [5][6] - In recent years, Xiansheng Pharmaceutical has secured over $2.3 billion in potential transaction value through three overseas licensing agreements for self-developed innovative drugs, indicating a proactive shift towards globalizing Chinese original drugs [5]
先声ADC新药成功出海！授权斩获最高7.45亿美元