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綠葉製藥合作創新藥Lurbinectedin(Zepsyre®)在美國申報NDA
格隆匯 12-18 21:40

2019年12月18日,上海——綠葉製藥的合作伙伴PharmaMar於近日宣佈,已通過加速審批程序向美國食品藥品監督管理局(FDA)提交有關Lurbinectedin(Zepsyre®)的新藥上市申請(NDA),治療經過鉑基化療後疾病進展的小細胞肺癌(SCLC)患者。目前,綠葉製藥與PharmaMar在華合作共同開發該藥物。

Lurbinectedin(Zepsyre®)是西班牙生物製藥公司PharmaMar研發的海鞘素衍生物,為腫瘤創新藥。綠葉製藥擁有該藥物在中國開發及商業化的獨家權利,包括小細胞肺癌在內的所有適應症;並可要求PharmarMar進行該藥物的技術轉移,由綠葉製藥在中國生產。

小細胞肺癌佔全部肺癌患者的10%~15%左右,是比非小細胞肺癌侵襲性更強、更難治療的一種肺癌類型,5年生存率僅為5%-10%。儘管小細胞肺癌對初始化療和放療具有較高的敏感性,但在初始治療失敗後,大多數患者最終死於復發轉移,預後差。小細胞肺癌的新藥進展緩慢,自1996年治療複發性小細胞肺癌的新化合物拓撲替康獲得美國FDA批准後,近20多年來該治療領域尚未出現實質性變化。

美國FDA的加速審批程序允許藥物開發公司基於II期臨牀試驗結果遞交NDA,治療具有未滿足醫療需求的嚴重疾病。此次申報基於Lurbinectedin(Zepsyre®)治療小細胞肺癌的II期單藥治療籃式研究數據。該試驗共入組105名患者,試驗結果表明,Lurbinectedin(Zepsyre®)作為單藥療法,二線單藥治療小細胞肺癌的總有效率(ORR)達到35.2%。

根據研究者評估和獨立評審委員會(Independent Review Committee)的評估結果,該試驗達到總有效率(ORR)的主要終點。研究結果也已在今年6月的美國臨牀腫瘤學會(ASCO)大會上發佈。

PharmaMar公司抗腫瘤事業部總經理Luis Mora表示:"依照加速批准條例遞交監管申請,FDA可能會在2020年批准Lurbinectedin (Zepsyre®)治療小細胞肺癌的上市申請。如果獲批,Lurbinectedin(Zepsyre®)有望於2020年下半年在美國上市。"

綠葉製藥希望通過與PharmaMar的合作進一步拓展自身在腫瘤領域的研發產品線,也希望通過該創新藥為廣大中國醫生和患者提供新的治療選擇。腫瘤領域是綠葉製藥聚焦的核心治療領域之一,公司憑藉自主研發與合作研發的方式,深度佈局該治療領域的全球產品線,目前已有十餘個創新制劑和創新藥,分別在中國和海外處於不同臨牀階段。

關於Lurbinectedin(Zepsyre®)

Lurbinectedin(Zepsyre®)是海鞘素衍生物,為RNA聚合酶II的抑制劑,能夠與DNA雙螺旋結構上的小溝共價結合,通過阻滯RNA聚合酶II與DNA的結合,並降解RNA聚合酶II的催化亞基RPB1,從轉錄的起始至延長階段發揮抑制轉錄活性,使腫瘤細胞在有絲分裂過程中畸變、凋亡、最終減少細胞增殖。

Lurbinectedin(Zepsyre®)作為單藥治療複發性SCLC的II期臨牀試驗主要研究結果

Lurbinectedin(Zepsyre®)在II期試驗中達到總有效率(ORR)的主要終點,顯示其作為單藥二線治療小細胞肺癌有效;

ORR為35.2%,中位總生存期(OS)為9.3個月;

Lurbinectedin(Zepsyre®)在敏感性復發的患者中(停療間隔≥90天)的效果更好,ORR為45%,OS為11.9個月;

Lurbinectedin(Zepsyre®)在耐藥復發的患者中(停療間隔<90天)表現出的活性,其ORR為22.2%,OS為5個月,對於這一類患者,目前市場上尚無獲批藥物;

Lurbinectedin(Zepsyre®)具有良好、可控的安全性;

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