CN105198790A - 促进双阴性t细胞体外增殖的四环化合物 - Google Patents

促进双阴性t细胞体外增殖的四环化合物 Download PDF

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CN105198790A
CN105198790A CN201510186837.4A CN201510186837A CN105198790A CN 105198790 A CN105198790 A CN 105198790A CN 201510186837 A CN201510186837 A CN 201510186837A CN 105198790 A CN105198790 A CN 105198790A
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CN105198790B (zh
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范国煌
廖诗骅
陈曦
李润生
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Aimeifei Biopharmaceutical Technology Shanghai Co ltd
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    • C07D209/00Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D209/02Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
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Abstract

本发明公开了一种促进双阴性T细胞体外增殖的四环化合物,所述四环化合物为IMC-00239,其分子式为:。本发明涉及用高通量筛选法从化合物库中筛选到能促进CD3+/CD4-/CD8-双阴性T(DN?T)细胞体外增殖的四环化合物,包括其药学上可接受的盐和前药。该类化合物是Wnt信号通路的抑制剂,在体外实验中能诱导DN?T细胞β-Catenin的降解,促进细胞周期与有丝***。此类化合物可以有效的促进CAR-DN-T体外扩增***的构建,帮助CAR-DN-T细胞工厂的实现。

Description

促进双阴性T细胞体外增殖的四环化合物
技术领域
本发明涉及生物医药领域的一种促进双阴性T细胞体外增殖的四环化合物,尤其涉及一种促进CD3+/CD4-/CD8-双阴性T(DNT)细胞体外增殖的四环化合物。
背景技术
免疫疗法被认为是癌症治疗的第三次革命,其中嵌合抗原受体T细胞(CAR-T)技术对CD19+急性B淋巴细胞白血病的卓越的临床试验结果已经引起医学界的广泛关注,被认为是最有希望治愈肿瘤的疗法。
然而,当前的CAR-T治疗是用患者自体T细胞进行CAR-T细胞改造,这就对患者的T细胞数量,活力与增殖能力有很高的要求。临床试验实践中发现,超过80%的患者的T细胞达不到CAR-T细胞制备的要求,因此大多数患者无法从现行的CAR-T治疗中受益。鉴于这一问题,同源异体类CAR-T的制备成为研究的热点。
目前的研究策略是通过基因敲除技术将同源异体来源的T细胞的T细胞受体(TCR)敲除后,使其失去MHC限制的特性,然后纯化出TCR敲除的T细胞,再进行CAR-T细胞的制备,使之发挥肿瘤杀伤作用且避免引起移植物抗宿主疾病(GVHD)。但在实际操作中遇到很大的技术瓶颈,主要原因是用于基因敲除技术的CRISPR-Cas9等载体分子量较大,导入T细胞困难、基因敲除的效率低下。并且,如果使用病毒转染的方式导入CRISPR-Cas9等载体,又会出现嵌合抗原受体二次病毒转染的抵制现象,CAR-T细胞得率低下,不能进行大规模制备,应用性差。
已有的研究发现,正常人的外周血中存在一群CD3+/CD4-/CD8-双阴性T(DNT)细胞,其不具有MHC限制性,不会引起移植物抗宿主疾病,结合已有的嵌合抗原受体技术,构建出一种新型的嵌合抗原受体DN-T细胞(CAR-DN-T),可以异体回输肿瘤患者。但是,鉴于DNT细胞仅占约占外周血单个核细胞(PBMC)的1-5%,难以达到CAR-DN-T治疗所需的细胞量。
发明内容
本发明的目的在于克服现有技术存在的以上问题,提供一种促进双阴性T细胞体外增殖的四环化合物。
为实现上述技术目的,达到上述技术效果,本发明通过以下技术方案实现:
一种促进双阴性T细胞体外增殖的四环化合物,所述四环化合物为IMC-00239,其分子式为:
进一步的,所述促进双阴性T细胞体外增殖的四环化合物促进DNT细胞体外增殖的应用。
本发明的有益效果是:
1、发明涉及用高通量筛选法从化合物库中筛选到能促进CD3+/CD4-/CD8-双阴性T(DNT)细胞体外增殖的四环化合物,包括其药学上可接受的盐和前药。该类化合物是Wnt信号通路的抑制剂,在体外实验中能诱导DNT细胞β-Catenin的降解,促进细胞周期与有丝***。由于DNT细胞不具有MHC限制性,不会引起移植物抗宿主疾病(GVHD),结合已有的嵌合抗原受体(CAR)技术,构建出一种新型的嵌合抗原受体DN-T细胞(CAR-DN-T),可以异体回输肿瘤患者,实现CAR-T细胞工厂的产业化。鉴于DNT细胞仅占约占外周血单个核细胞(PBMC)的1-5%,需建立高效的体外大规模扩增***才能满足CAR-DN-T治疗的细胞量需求。此类化合物可以有效的促进CAR-DN-T体外扩增***的构建,帮助CAR-DN-T细胞工厂的实现。
2、通过基于原代DNT细胞的高通量细胞增殖筛选平台所获得的化合物IMC-00239与T细胞受体抗体和细胞因子联用,能做体外高效促进DNT细胞增殖,其扩增能力超过4000倍,比T细胞受体抗体和细胞因子处理组高出7倍,且呈剂量依赖效应。该化合物在≦30μM下无明显细胞毒性。进一步研究发现IMC-00239主要通过抑制Wnt信号通路诱导β-Catenin降解调控DNT细胞的增殖。IMC-00239对DNT细胞的促增殖作用有力的支持的CAR-DN-T细胞体外扩增***的建立,满足了治疗所需细胞量。
上述说明仅是本发明技术方案的概述,为了能够更清楚了解本发明的技术手段,并可依照说明书的内容予以实施,以下以本发明的较佳实施例并配合附图详细说明如后。本发明的具体实施方式由以下实施例及其附图详细给出。
附图说明
此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:
图1为基于原代DNT细胞的高通量细胞增殖筛选以及CAR-T杀伤实验流程图;
图2为IMC-00239促进DNT细胞的增殖及其信号通路图一;
图3为IMC-00239促进DNT细胞的增殖及其信号通路图二;
图4为IMC-00239促进DNT细胞的增殖及其信号通路图三;
图5为IMC-00239促进DNT细胞的增殖及其信号通路图四;
图6为IMC-00239对CAR-DN-T增殖的促进作用示意图;
图7为IMC-00239化合物处理的CAR-DN-T细胞具有体外杀伤功能示意图。
具体实施方式
下面将参考附图并结合实施例,来详细说明本发明。
鉴于DNT细胞仅占外周血单个核细胞(PBMC)的1-5%,需建立高效的体外大规模扩增***才能满足CAR-DN-T治疗的细胞量需求。我们建立基于原代DNT细胞的高通量细胞增殖筛选平台,并将筛选到的化合物在CAR-DN-T细胞上进一步验证,并确证其不影响CAR-T的细胞杀伤能力,具体流程见图1所示。通过这一平台,我们发现一系列能够促进DNT细胞增殖的小分子化合物,其中,作用最强的是一个四环化合物(IMC-00239),其分子式为:
我们通过基于原代DNT细胞的高通量细胞增殖筛选平台所获得的化合物IMC-00239与T细胞受体抗体和细胞因子联用,能做体外高效促进DNT细胞增殖,其扩增能力超过4000倍,比T细胞受体抗体和细胞因子处理组高出7倍(0.5μM,参照图2所示),且呈剂量依赖效应(pEC50=7.2,参照图3所示)。该化合物在≦30μM下无明显细胞毒性,参照图4所示。进一步研究发现IMC-00239主要通过抑制Wnt信号通路诱导β-Catenin降解调控DNT细胞的增殖,参照图5所示。IMC-00239对DNT细胞的促增殖作用有力的支持的CAR-DN-T细胞体外扩增***的建立,满足了治疗所需细胞量。
实施例
IMC-00239对CAR-DN-T的促扩增作用,且不影响CAR-DN-T的细胞杀伤功能。
从健康捐献者外周血单个核细胞中分选出的DNT细胞经嵌合抗原受体的慢病毒感染后,分别用T细胞受体抗体和细胞因子(Vehicle)以及0.5μMIMC-00239联合T细胞受体抗体和细胞因子刺激,培养14天。IMC-00239组细胞数高于Vehicle组约7倍左右,参照图6所示。将IMC-00239组与细胞因子组CAR-DN-T进行细胞杀伤能力的比较发现IMC-00239对CAR-DN-T的细胞杀伤能力无明显影响,参照图7所示。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (2)

1.一种促进双阴性T细胞体外增殖的四环化合物,其特征在于,所述四环化合物为IMC-00239,其分子式为:
2.根据权利要求1所述的促进双阴性T细胞体外增殖的四环化合物促进DNT细胞体外增殖的应用。
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Publication number Priority date Publication date Assignee Title
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