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邁博藥業-B(02181.HK)擬7000萬元收購CMAB807所有專利及技術
格隆匯 03-01 22:59

格隆匯3月1日丨邁博藥業-B(02181.HK)宣佈,於2021年3月1日,百邁博(作為許可方)及泰州藥業(公司全資附屬公司,作為被許可方)訂立許可協議,據此,泰州藥業同意收購,且百邁博同意不可撤銷地授出使用有關CMAB807(地諾單抗,用於治療高骨折風險的絕經後女性骨質疏鬆症的生物類似藥)所有專利、產品及技術,以進行CMAB807的深入研發、製造及商業化的全球、獨家及永久許可權,總代價為人民幣7000萬元。

CMAB807為地諾單抗,一種對人RANKL(核因子κB受體活化因子配體)具親和性及特異性的人免疫球蛋白G2(IgG2)單克隆抗體,RANKL是破骨細胞(負責骨吸收的細胞)形成、發揮功能及存活所必需的跨膜或可溶性蛋白。CMAB807阻止RANKL激活破骨細胞及其前體表面的受體RANK。阻止RANKL與RANK相互作用抑制破骨細胞的形成、發揮功能及存活,從而減少骨吸收並增加皮質骨及小梁骨的骨量和強度。

受RANKL刺激而增加的破骨細胞活性是骨轉移實體瘤中骨病理學的介質。類似地,骨鉅細胞瘤由表達RANKL的基質細胞及表達RANK受體的破骨細胞樣鉅細胞組成,RANK受體信號傳導促進骨溶解及腫瘤生長。CMAB807阻止RANKL激活破骨細胞、其前體及破骨細胞樣鉅細胞表面的受體RANK。CMAB807已獲得中國國家藥監局頒發的骨質疏鬆症適應症臨牀試驗批准,目前正在進行III期臨牀試驗。

公司表示,CMAB807主要針對兩類適應症,即骨質疏鬆症及骨轉移,在中國具有巨大的商業化潛力。日益擴大的患者羣體及對骨質疏鬆症意識的提高是中國地諾單抗市場的主要驅動力,為CMAB807未來的市場拓展提供了巨大空間。公司預期,中國地諾單抗生物類似藥的市場規模將從2020年的約人民幣1億元增至2035年的約人民幣438億元。另一方面,骨轉移適應症有望與公司現有的腫瘤藥物(如CMAB009及CMAB819)產生互補效應,令公司能夠優化腫瘤藥物資源,提高腫瘤藥物的銷售及營銷效率。

根據目前CMAB807的研發進度,公司認為,CMAB807有望成為獲准在中國商業化的前三款上市地諾單抗生物類似藥之一,並有望成為中國第一款與Prolia通過頭對頭III期臨牀試驗的生物類似藥。

公司預期,隨着近年來國家藥價談判的實施,藥品終端招標採購價將繼續逐步下降。公司於大規模生產抗體方面的技術及成本優勢將令公司能夠以有競爭力的價格銷售CMAB807,從而接觸到更廣泛的患者羣體,提高市場滲透率,以搶抓中國RANKL市場不斷增長的需求。

此外,公司正建立針對各類慢性病的藥品銷售平台(即CMAB007及CMAB008)。公司可利用銷售平台加速向中國市場引入CMAB807(其主要適應症之一為慢性病骨質疏鬆症),並透過銷售平台確保對該藥品的穩定需求。

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