Carl June联合创立的Tmunity获费城儿童医院**许可,推进GPC2 CAR-T用于神经母细胞瘤的治疗

2019-10-12 柏柏 医麦客

近日,Tmunity Therapeutics宣布与费城儿童医院(CHOP)签署了独家许可和研究合作协议,以推进Glypican 2(GPC2)嵌合抗原受体T细胞(CAR-T)治疗神经母细胞瘤。

近日,Tmunity Therapeutics宣布与费城儿童医院(CHOP)签署了独家许可和研究合作协议,以推进Glypican 2(GPC2)嵌合抗原受体T细胞(CAR-T)治疗神经母细胞瘤。

此前的研究表明,GPC2 CAR-T细胞疗法在髓母细胞瘤和小细胞肺癌,以及其他几种在细胞表面表达丰富GPC2蛋白的小儿和成人癌症中都有扩展的潜力。

CHOP的儿科医生和医师科学家John Maris和MD Kristopher Bosse鉴定并验证了癌蛋白GPC2。它在神经母细胞瘤上高表达,但在正常的儿童组织中未检测到明显水平。

在2017年发表于Cancer Cell上的一篇开创性论文中,CHOP研究小组认为,由于GPC2对神经母细胞瘤增殖的需要,它可能不太容易受到免疫逃逸机制的影响。他们的工作验证了GPC2是一种非突变的神经母细胞瘤蛋白,并为GPC2作为免疫治疗靶标奠定了坚实的基础。

宾夕法尼亚大学佩雷尔曼医学院儿科和CHOP的助理教授Bosse博士说:“这项新的合作以我们先前的研究为基础,并将Tmunity在设计和开发CAR-T细胞方面的经验与CHOP在跨神经母细胞瘤和其他几种癌症的细胞表面分子家族生物学方面的专业知识相结合。”

Tmunity总裁兼首席执行官Usman“ Oz” Azam博士表示:“与CHOP的合作扩展了我们世界一流的学术合作伙伴网络,并且推进了我们建立儿科肿瘤学特许经营权和针对毁灭性疾病的新型T细胞疗法的战略。通过将CHOP的科学见解和研究与Tmunity的T细胞开发、监管以及制造能力和专业知识相结合,我们创建了一支强大的团队来应对这种致命的癌症。”

他还说道:“我们期待与Maris博士、Bosse博士及其团队合作,推进GPC2 CAR-T细胞疗法的发展,为选择有限的患者带来希望。”

神经母细胞瘤的治疗现状

神经母细胞瘤是一种罕见的癌症,起源于原始神经嵴细胞的胚胎性恶性肿瘤,它通过在胚胎期攻击未成熟的神经细胞来影响神经系统的发育,为儿童最常见的颅外实体瘤,占所有儿童恶性肿瘤的8%~10%,被称为儿童肿瘤之王。在美国,每年约有800名儿童被诊断为神经母细胞瘤,总体存活率低于50%。

目前该疾病的治疗方案大多为手术、化疗以及放疗,这些治疗方法有限并且毒性极高,这突显了对该疾病新疗法的迫切需求,而GPC2 CAR-T细胞疗法不仅可以改善总体存活率而且能够降低长期毒性。

GPC2 CAR-T治疗神经母细胞瘤

GPC2(磷脂酰肌醇蛋白聚糖2重组蛋白)是一种蛋白质产物,携带硫酸乙酰肝素的细胞表面蛋白聚糖,具有可以完成与发育中神经元的运动行为相关的功能。近年来的研究表明,GPC2蛋白在神经母细胞瘤中的表达明显增加,在正常组织(包括脑、心、肺和肾)中的表达不明显,表明GPC2是神经母细胞瘤中一种合适的肿瘤抗原。


研究表明,GPC2对于神经母细胞瘤的增殖是必需的(图片来源:Cancer Cell)

儿科癌症梦想团队联合负责人、CHOP神经母细胞瘤研究主席Giulio D'Angio博士说道:“我们的研究证实,GPC2是神经母细胞瘤等恶性肿瘤进取的重要目标。我们期待有一天将GPC2 CAR-T细胞疗法带入临床和有需要的患者。”他还表示,他们很高兴与Tmunity合作,加速GPC2 CAR-T治疗神经母细胞瘤的开发。

根据签订协议的条款,Tmunity将与CHOP合作启动已授权的IND研究,并尽快运用于临床。Tmunity将负责领导GPC2 CAR-T细胞疗法的开发、制造、监管和商业化。大多数临床前研究将由CHOP进行。

关于Tmunity Therapeutics

Tmunity Therapeutics是一家总部位于费城的私有生物治疗公司,致力于通过为更多毁灭性疾病的患者提供下一代T细胞免疫疗法的全部潜力来挽救和改善生活。

Tmunity在创建之初即与宾大医学院签署了排他性的长期合作协议以及技术/专利授权协议。以Carl H. June教授为首的科学创始人团队,曾在全球范围内首次将细胞和基因治疗技术成功实现了临床转化。

目前,Tmunity产品线包括针对多种癌症的研究以及下一代疗法,包括前列腺癌、骨髓瘤、黑素瘤和滑膜肉瘤。

研发管线(图片来源:Tmunity)

另外,Tmunity正在利用UPenn的实验室和生产设施以及宾夕法尼亚州诺里斯敦的专用cGMP制造设施来追求工艺改进和生产规模扩大,以支持T细胞疗法的临床开发。

结语

尽管目前对神经母细胞瘤的治疗取得突破性进展还有待时日,但此次Tmunity 与CHOP的合作已经拓宽了儿科肿瘤治疗渠道, 扩展了其他难以治疗的实体瘤的潜力,这将对儿童神经母细胞瘤的治疗有着重要意义。

值得注意的是,GPC2在除了神经母细胞瘤之外的其他儿童癌症中也存在过表达的情况,因此也可能将这种方法应用于多种高危儿童癌症的治疗。

推荐阅读:有效性提高5倍!宾大AACR宣布CAR-T联合PD-1/CTLA-4抗体治疗恶性脑瘤再获突破

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    2020-03-20 一叶知秋
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    2020-05-04 仁者大医
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