2019 ASH -- 陆佩华院长分享CAR-T细胞免疫治疗新成果

2019-12-20 美通社 美通社

2019年12月7日-10日,第61届美国血液学协会(ASH)年会在美国奥兰多盛大召开。近年来,CAR-T细胞治疗在血液肿瘤上显示了卓越的疗效,备受业界同行关注。陆道培医院是国内最早开始CAR-T研究的医院之一,今年ASH大会上有4篇CAR-T治疗相关的口头报告入选。与会期间,陆道培医院医疗执行院长陆佩华分享了CAR-T细胞免疫治疗的最新研究成果。研究亮点1.“抗CD19/CD22双靶点CAR

2019年12月7日-10日,第61届美国血液学协会(ASH)年会在美国奥兰多盛大召开。近年来,CAR-T细胞治疗在血液肿瘤上显示了卓越的疗效,备受业界同行关注。陆道培医院是国内最早开始CAR-T研究的医院之一,今年ASH大会上有4篇CAR-T治疗相关的口头报告入选。与会期间,陆道培医院医疗执行院长陆佩华分享了CAR-T细胞免疫治疗的最新研究成果。

研究亮点

1.“抗CD19/CD22双靶点CAR-T治疗难治和复发B细胞急性淋巴细胞白血病(B-ALL)”口头报告荣登“ASH Highlights”。

2. CD19/CD22双靶点CAR-T治疗CD19 + CD22 +复发/难治性B-ALL显示出剂量依赖性高CR率,安全性良好。

3. FasT CAR-T新平台可将生产制备时间缩短至1天,对于治疗B-ALL是安全且高效的。

专家简介

陆佩华院长 
陆佩华院长

陆佩华 陆道培医院医疗执行院长 
美国血液病及肿瘤内科专家 
中国非公医疗协会第一届常务理事 
中国非公立医疗机构协会血液病专业委员会主任委员 
中国非公立医疗机构协会生物技术与细胞应用专业委员会常务委员 
中国造血干细胞捐献者资料库专家委员会委员 
中国临床肿瘤学会 (CSCO) 抗白血病联盟专家委员会常务委员

关于CAR-T细胞免疫治疗的最新进展,陆佩华院长表示:近年来,CAR-T治疗进展飞速,日新月异。全世界相关领域的科学家都在开展CAR-T的研究。目前在恶性血液肿瘤的治疗中,CAR-T疗效显著,同时还需要不断进行优化。目前国内的科学家、公司和研究团队,也致力于开发新的产品,以及优化现有的产品,所谓的优化就是通过各种方法提高疗效,包括短期疗效和长期疗效,同时降低毒副反应。国内很多研究单位在CAR-T细胞免疫治疗的研究中取得了不错的成果,在本次ASH大会上有很多原创性的研究,大家有目共睹,如陆道培医院的4项CAR-T治疗相关口头报告:“254例接受CD19 CAR-T细胞治疗复发/难治性(R/R)B-ALL患者的治疗反应预测因素分析”(摘要号224)、“CD19/CD22双靶点CAR-T细胞治疗复发/难治B-ALL”(摘要号284)、“CD19 FasT CAR-T细胞治疗难治/复发B-ALL的安全性和可行性研究”(摘要号825)和“CAR分子的表面密度可调节体内CAR-T细胞的动力学”(摘要号54),其中前两项口头报告荣登“ASH Highlights”。

针对CD19和CD22双靶点的CAR-T细胞是否能降低复发率以及副作用是否会增加这个问题,陆佩华院长说:CD19 CAR-T细胞疗法在治疗B-ALL上显示出很好的疗效,但是一旦出现复发后,很多患者被观察到CD19抗原逃逸。为此,我院与亘喜生物团队合作开展了双靶点Dual CAR-T治疗的研究。CD22作为另一种白血病抗原标志物,在CD19阴性复发的B-ALL肿瘤细胞上表达。我们通过一项Ⅰ期临床研究探索了CD19/CD22双靶点CAR-T细胞治疗复发/难治B-ALL的安全性和有效性。研究共入组了20例复发/难治B-ALL患者,接受CD19/CD22双靶点CAR-T细胞治疗。需要指出的是,纳入的7例曾接受过CD19单靶点的CAR-T治疗,其中5例是又曾接受过异基因造血干细胞移植后复发的患者。中位年龄为9.5岁(4-45岁),中位随访时间为107天(14-215天)。最早入组的4例患者接受了低剂量的CD19/CD22双靶点CAR-T细胞输注,在输注后14天评估发现无效;之后入组的16例分别接受了中、高剂量的细胞输注。输注后28天评估结果显示,15/16 (93.8%) 的患者达到了完全缓解 (CR),其中15例患者均是微小残留病灶 (MRD) 阴性的深度完全缓解。特别值得说明的是,此研究显示CD19/CD22双靶点CAR-T细胞的安全性很高,没有一例患者出现严重的细胞因子释放综合征 (CRS),30%未出现CRS,其余70%的患者伴随有一级CRS;无一例患者出现神经毒性。

CD19/CD22双靶点CAR-T细胞治疗难治/复发B-ALL显示了很低的毒性和剂量依赖性的高CR率,使曾经接受过CD19单靶点CAR-T细胞治疗出现复发的患者,或者是曾接受造血干细胞移植后复发的患者,有了再一次获得完全缓解的机会。而且CD19/CD22双靶点CAR-T的安全性很高,值得入组更多患者长期随访进一步观察它的长期疗效。

陆佩华院长介绍了FasT CAR-T在临床研究中的可行性和安全性CD19 CAR-T细胞疗法在B-ALL显示了很高的疗效。然而,传统的CAR-T疗法成本高且流程冗长,限制了其临床应用。我院与亘喜生物团队合作开展一种新的FasT CAR-T治疗的研究,使更多患者可以从中受益。FasT CAR-T制备时间从传统的9-14天缩短至1天,成本因此大大降低。FasT CAR-T的临床前研究结果喜人,我们通过一项Ⅰ期临床试验,评估FasT CAR-T治疗复发/难治B-ALL的安全性和可行性。研究共入组了20例难治/复发B-ALL患者,中位年龄23岁(14-44),中位随访时间92天(33-291)天,接受单次FasT CAR-T细胞输注后15天和28天,20/20 (100%)的患者达到了CR,而且在28天,18/20(90%)的患者达到了MRD阴性的深度完全缓解。值得一提的是,该产品显示出良好的安全性,85%的患者只出现了0-2级CRS,15%的患者出现了3级CRS。2例患者出现了神经毒性,以上出现的副作用均可控。

关于FasT CAR-T未来的应用前景陆佩华院长表示:FasT CAR-T细胞治疗难治/复发B-ALL临床上有效,副作用可控。FasT CAR-T作为新型治疗方法,解决了传统CAR-T治疗存在的一些问题,它能在1天内实现细胞的制备,缩短了生产时间,降低了成本,甚至减少了患者住院时间,尤其是对于疾病进展快速的患者更是减少了等待治疗的时间。在动物实验中对于肿瘤的效能更高,目前在临床上也显示了很好的疗效,副作用可控。

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    2020-08-09 wgx306
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    2020-09-10 仁者大医
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    2019-12-22 kksonne
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