BMS、默沙东及罗氏免疫治疗药物将成为ASCO会议的焦点

2014-05-22 佚名 dxy

当世界顶尖癌症医生于下月在芝加哥相聚时,来自默沙东、百时美施贵宝及罗氏帮助免疫系统抗击疾病的新药有望成为人们关注的焦点。 这些药物被称之为抗PD-1或抗PDL1治疗药物,它们均是生物药物,通过阻止肿瘤掩饰自己的能力,让T细胞识别并攻击癌症而起作用。 这些药物已对最致命的皮肤癌——晚期黑色素瘤以及晚期肺癌和肾癌显示出极好前景,并且这些药物的副作用比较温和,这让研究者及投资者产生极大兴奋。 5月

当世界顶尖癌症医生于下月在芝加哥相聚时,来自默沙东、百时美施贵宝及罗氏帮助免疫系统抗击疾病的新药有望成为人们关注的焦点。

这些药物被称之为抗PD-1或抗PDL1治疗药物,它们均是生物药物,通过阻止肿瘤掩饰自己的能力,让T细胞识别并攻击癌症而起作用。

这些药物已对最致命的皮肤癌——晚期黑色素瘤以及晚期肺癌和肾癌显示出极好前景,并且这些药物的副作用比较温和,这让研究者及投资者产生极大兴奋。

5月30日在芝加哥举行的美国临床肿瘤学会会议上,研究者将首次发布罗氏抗PDL1药物用于晚期膀胱癌的数据。在此之前,膀胱癌已有数十年没有显著的进展。

默沙东将至少开展16项抗PD-1药物MK-3475的临床研究,包括首次观察这款药物用于肺癌的试验。5月14日发布的早期数据显示,45名患者中有36%的患者对该药物有初始的免疫响应。默沙东还提供了该药物用于头颈癌的第一项试验的结果。

这些药物保持持续效果的潜能将在百时美施贵宝抗PD-1药物Nivolumab的两项研究中展示出来。研究人员将发布后续的一项由107名患者参与的Nivolumab用于转移性黑素色瘤的研究数据,数据显示,41%的患者在三年后仍存活,这与两年时48%的生存率明显持平。晚期黑色瘤的三年生存期在癌症免疫治疗药物出现之前是根本不可想象的。

在一项晚期肾癌治疗后病情出现进展的患者参与的试验中,2mg剂量Nivolumab用药患者的平均总生存期是25.5个月。目前正在使用的药物在过去的肾癌研究中已证实其平均生存期为14个月,百时美施贵宝Nivolumab全球开发主管Fouad Namouni说。

最可能获得收益的患者

由于制药商对新药如何定价面临更多的审查(免疫治疗药物有望处于最昂贵行列),所以几项研究将旨在证实哪些患者最有可能从新药中获得收益。

研究者现在可以进行一项试验来确定PD-L1蛋白在癌细胞表面表达的程度。在0到3范围内,0分或1分被认为PD-L1呈阴性,2到3分被认为PD-L1呈阳性。

根据一些研究者提供的信息,如果早期数据在更大规模试验中得到证实,那这类免疫治疗药物可能成为用于这些患者的独立药物,而PD-L1呈阴性的患者可合并用药或替代治疗药物。

在百时美施贵宝Nivolumab用于之前未经治疗的晚期肺癌的一项小规模1期研究中,10名PD-L1阳性患者中有5名患者的肿瘤缩小至少30%。在7名PD-L1阴性患者中看不到这样的响应。罗氏在其膀胱癌试验中还观察到20名PD-L1阳性患者中有一半的患者对这款药物有响应。

原始出处

Bill Berkrot.Bristol, Merck, Roche immune therapies are cancer meeting focus.Wed May 14. 

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    2014-06-08 quxin068
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    2014-05-24 yese
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    2014-05-24 canlab
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    2014-05-23 58.52.133.84

    免疫治疗是未来焦点,尤其是PD-1/PD-L1的几款新药的良好疗效,让人看到曙光!未来更要关心它配合其它传统药物治疗的增效作用

    0

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