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復宏漢霖(02696.HK)與三優生物及之江生物合作開發新冠肺炎全人源抗體藥物
格隆匯 05-06 18:57

格隆匯5月6日丨復宏漢霖-B(02696.HK)發佈公告,2020年5月6日,本着優勢互補、平等互利、共同發展的原則,經各方共同協商,公司與三優生物醫藥(上海)有限公司(“三優生物”)、上海之江生物科技股份有限公司(“之江生物”)就合作開發新冠肺炎(COVID-19)全人源抗體藥物用於單藥或聯用治療新冠肺炎簽訂合作協議,三優生物與之江生物就該協議條款下的所有責任和義務承擔連帶責任。

根據該協議,公司在合作方的協助下,負責主導完成新冠肺炎全人源抗體藥物的細胞株及細胞庫構建、藥理藥代、藥效學評價、藥物處方及工藝研究、中試生產及檢驗、質量研究、安全性評價,以及根據公司與合作方協商一致的新藥臨牀試驗(IND)申報策略和市場需求,在中國和╱或其他國家、地區完成新藥臨牀試驗(IND)申報。

合作方主導完成經病毒中和活性驗證的新冠肺炎病毒全人源抗體藥物優選分子的PCT國際專利申請,並保證進入PCT國家階段,同時保證相關中國發明專利申請及申請後的維護。

合作方於此次合作投入經病毒中和活性驗證的新冠肺炎病毒全人源抗體藥物候選及備選分子,並將該項目下投入資產所定義的所有知識產權(包括合作方就該項目已經申請的專利)全部免費授予獨佔許可給公司用於新冠肺炎抗體藥物的研發、生產製造和商業化應用,投入價值以人民幣2,500萬元核算。本次合作開發成果的適用區域為全球。

抗體藥物能夠特異性地識別病原體並與之結合,進而通過機體自身免疫系統的作用清除病原體,通常具有特異性高、安全性好、血清半衰期長等特性。其中,全人源抗體藥物具有100%人源氨基酸序列,與嵌合抗體和人源化抗體相比,具有更低的免疫原性和更好的安全性。

合作方將提供依託全人源抗體庫等技術平台已篩選出的具有優異抗病毒活性且對細胞無毒性的候選及備選分子,該全人源單克隆抗體從機理上能夠中和新冠肺炎病毒,能夠特異性識別SARS-CoV-2病毒spike蛋白受體結合結構域(RBD),阻斷其與人ACE2受體的結合,從而抑制病毒活性。

截至該公告日,該候選藥物已完成了抗體的早期篩選、細胞水平初步活性檢測、體外活病毒中和活性檢測、初步成藥性分析和抗體細胞株克隆初篩工作,尚處於臨牀前研究階段;全球範圍內尚無新冠肺炎(COVID-19)全人源抗體藥物獲得上市批准。

公告表示,新冠肺炎中和抗體從機理上能夠中和新冠肺炎病毒,是研發新冠肺炎治療藥物的重要方向,目前尚無有效抗體藥物獲批准用於新冠肺炎病毒治療。公司已建立起高效、先進的單抗藥物研發及產業化平台,通過此次與三優生物、之江生物的合作,積極踐行作為醫藥企業的社會責任,有望集中各方優勢,加快新冠肺炎抗體藥物的研發。

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