ASCO 2018:SHR-1210联合阿帕替尼用于晚期肝癌,客观缓解率超50%

2018-06-05 MedSci MedSci原创

免疫检查点抑制剂是近年来肿瘤领域的热点话题,随着研究的深入,免疫治疗由最初的黑色素瘤、肺癌、乳腺癌等逐渐进入肝癌、胃癌等领域。2018年,由中国人民解放军第三〇七医院消化肿瘤内科主任徐建明教授牵头的一项研究(以下称NCT02942329研究)公布结果,该研究正是探索了国产免疫检查点抑制剂SHR-1210联合阿帕替尼在晚期肝细胞癌(HCC)、胃癌、食管胃结合部癌的应用,并展示出鼓舞人心的结果!该研究

免疫检查点抑制剂是近年来肿瘤领域的热点话题,肿瘤免疫治疗由最初的黑色素瘤、肺癌乳腺癌等逐渐进入肝癌、胃癌等领域。

2018年,由中国人民解放军第307医院消化肿瘤内科主任徐建明教授牵头的NCT02942329研究公布结果,该研究正是探索了国产免疫检查点抑制剂SHR-1210联合阿帕替尼在晚期肝细胞癌(HCC)、胃癌、食管胃结合部癌的应用,并展示出鼓舞人心的结果!该研究已受邀参加6月1-5日召开的2018 美国临床肿瘤学会年会(ASCO)的壁报交流环节。


SHR-1210是由我国江苏恒瑞医药有限公司自主研发的一种人源化IgG4单克隆抗体药物,是一个多靶点的免疫检查点抑制剂,靶点包括PD-1、PD-L1/PD-L2。基础研究已证实,SHR-1210在体内同时阻断程序性死亡(PD)-1和血管内皮生长因子受体2(VEGFR2),具有诱导协同抗肿瘤的作用。

徐建明教授在ASCO会议现场


徐建明教授牵头的此研究是SHR-1210联合阿帕替尼用于肝癌、胃癌、胃食管结合部癌的Ⅰ期临床试验,该研究表明:阿帕替尼250毫克/天,SHR-1210 200毫克,每2周1次的治疗方案,在晚期肝细胞癌中客观缓解率达54.5%。

在胃癌、胃食管结合部癌方面,这一方案也取得了不错的疗效。该方案在肝细胞癌、胃癌和胃食管结合部癌的毒性可控。

NCT02942329研究结果令人兴奋


NCT02942329研究分为两个阶段,1a和1b,研究对象为索拉菲尼治疗失败的晚期肝癌患者,以及胃癌、胃食管结合部癌患者。

1. 1a阶段确定联合用药固定剂量

1a阶段的主要研究目的是探索Ⅱ期试验的推荐剂量。试验设计阿帕替尼的爬坡剂量为125、250、500mg/天,SHR-1210使用固定剂量,200 mg,每2周1次。
 
1a期入组患者共15人,每个剂量组患者5人。研究结果发现,在500mg组出现了3例剂量限制性毒性,均为3度肺炎。因此后续试验的推荐剂量定为阿帕替尼250mg/天+SHR-1210 200 mg,每2周1次。

2.1b阶段数据令人鼓舞

1b阶段使用1a阶段的推荐剂量进行研究,主要目的是探索药物疗效和安全性。
 
截止2018年2月2日,1a、1b阶段共有42例患者入组(1b阶段入组27人,中位治疗时间为19周),其中36例可评价疗效,ORR和疾病控制率(DCR)分别为30.6%(n=11)和83.3%(n=30)。

在18例肝细胞癌患者中,14例可评价疗效,其中阿帕替尼125mg组4例,250mg组9例,500 mg组1例,全部感染乙型肝炎病毒(HBV)。ORR和DCR分别为50%和85.7%,中位无进展生存期(PFS)目前尚未达到,7例部分缓解(PR)患者仍在治疗,5例持续用药已达47周+。

值得一提的是,阿帕替尼125mg组有2例患者在初期就达到疾病稳定(SD),并在升级给予阿帕替尼250mg后达到PR,因此250mg剂量组ORR为54.5%(6/11),这一数据令人兴奋。

胃癌和胃食管结合部癌有24例入组患者,22例可评价疗效,其中250mg组患者20例,500 mg组患者2例。250mg组中的ORR为20%,DCR为80%,中位PFS为3个月。疗效也得到证实。

徐教授表示,两药联合后在肝癌的客观缓解率超过50%,这样的结果是不可思议的。“从此研究也能看出,阿帕替尼的剂量实际是非常低的,不到目前临床单药使用剂量的一半,但临床效果却是巨大的。阿帕替尼单药治疗肝癌的有效率不超过10%,PD-1也约为10%,而该研究中两者联合用于晚期肝癌的ORR超过50%,可看出两者互相促进的双向协同作用。另外也发现,不少患者的PR维持有效超过一年,患者状态也很好。”

不过,目前研究仍然处于临床I期阶段,后续还需要进一步扩大样本,进行临床2期和3期的研究,进一步确认这种联合方案的有效性与安全性。

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    2019-02-28 quxin068
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    2018-06-06 wzb521zf

    一起学习学习

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    2018-06-05 有备才能无患

    2018年.由中国人民解放军第307医院消化肿瘤内科主任徐建明教授牵头的NCT02942329研究公布结果.该研究正是探索了国产免疫检查点抑制剂SHR-1210联合阿帕替尼在晚期肝细胞癌(HCC).胃癌.食管胃结合部癌的应用.并展示出鼓舞人心的结果!该研究已受邀参加6月1-5日召开的2018美国临床肿瘤学会年会(ASCO)的壁报交流环节.

    0

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    2018-06-05 惠映实验室

    学习了.谢谢分享.

    0

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    2018-06-05 wqkm

    ^_^^_^^_^

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    2018-06-05 lovetcm

    有樱桃血管瘤的副作用.未来大量PD-1上市后.本药用途可能受限制!不能期待太高

    0

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