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NEJM:报道!CAR-T让这种淋巴瘤的脑转移完全缓解

2017-09-04 佚名 生物探索

8月24日,在给NEJM杂志的一封信中,来自麻省总医院(MGH)的一个研究小组报告了一名参与CAR-T疗法临床试验的患者出现的显著治疗响应:用CAR-T疗法治疗诱导了难治性弥漫性大B细胞淋巴瘤(diffuse large-B-cell lymphoma,DLBCL)脑转移的完全缓解。这是关于在中枢神经系统淋巴瘤中对CAR-T疗法响应的首个报道。

8月24日,在给NEJM杂志的一封信中,来自麻省总医院(MGH)的一个研究小组报告了一名参与CAR-T疗法临床试验的患者出现的显著治疗响应:用CAR-T疗法治疗诱导了难治性弥漫性大B细胞淋巴瘤(diffuse large-B-cell lymphoma,DLBCL)脑转移的完全缓解。这是关于在中枢神经系统淋巴瘤中对CAR-T疗法响应的首个报道。

报道还称,当CAR-T治疗两个月后一处皮下肿瘤复发时,在进行了活检后,CAR-T细胞竟然会自发地重新扩增,肿瘤再次进入缓解。这一现象先前从未被报道过。虽然患者最终在CAR-T治疗一年多后死亡,但脑部肿瘤从未复发。

MGH癌症中心的Jeremy Abramson博士解释称:“DLBCL脑转移的预后极差,常规疗法诱导如此完全和持久响应的能力是罕见的。”

不同于传统药物,CAR-T疗法是从患者体内分离出T细胞,在体外对T细胞进行改造,为其装上能够特异性识别癌细胞的“导航”——嵌合抗原受体(CAR)后,再将这类“改装后的CAR-T细胞”进行扩增,回输到患者体内,发挥特异的抗癌作用。

这一临床试验由Juno Therapeutics公司发起,旨在测试其靶向CD19的CAR-T疗法JCAR017。CD19在大多数B细胞白血病和淋巴瘤中都有表达。DLBCL是一种侵袭性癌症,能够在多种组织中发展。

被报道的这名患者是一位68岁的女性。她患有的DLBCL对常规化疗或干细胞移植都不响应。这种情况通常会导致患者预期寿命不到6个月。当被招募进入调查JCAR017安全性和抗肿瘤活性的1期临床试验中时,医生发现她的大脑右颞叶有新的病灶。


Pretreatment and Post-treatment Imaging.(图片来源:NEJM)

报道称,治疗一个月后(化疗后JCAR017静脉注射),随访成像显示,大脑病灶完全缓解了。两个月后复发的皮下病灶在活检后也消失了,并且这种消失是发生在没有进一步治疗的情况下。(The subcutaneous lesion that recurred two months later disappeared after the biopsy with no further treatment.)血液检测显示,与肿瘤消退一致的是,患者体内CAR-T细胞的数量增加了。

Abramson博士说:“通常,我们用来对抗癌症和其它疾病的药物会随着时间的推移而逐渐消失。这种活检后自发的重新增殖表明,CAR-T疗法是完全不同的。这种‘活的药物’能够响应生物刺激,进而重新增殖。”科学家们认为,弄清CAR-T细胞重新激活背后的机制有望进步一增强这类疗法的功效。

原始出处:

JS Abramson, B Mcgree, S Noyes,et.al. Anti-CD19 CAR T Cells in CNS Diffuse Large-B-Cell Lymphoma. N Engl J Med 2017

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    2017-11-26 仁者大医
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    2017-09-06 往日如昨

    继续学习中谢谢

    0

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    2017-09-06 往日如昨

    学习了谢谢分享

    0

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    2017-09-04 随梦飞扬

    CAR-T疗法是从患者体内分离出T细胞.在体外对T细胞进行改造.为其装上能够特异性识别癌细胞的[导航"--嵌合抗原受体(CAR)后.再将这类[改装后的CAR-T细胞"进行扩增.回输到患者体内.发挥特异的抗癌作用.

    0

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    2017-09-04 金戈铁马

    绝对优势

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