Suicide gene therapy to increase the safety of chimeric antigen receptor-redirected T lymphocytes.

Suicide gene therapy to increase the safety of chimeric antigen receptor-redirected T lymphocytes.
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DOI:
10.7150/jca.2.378
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发表时间:
2011
期刊:
影响因子:
3.9
通讯作者:
Bondanza A
Bondanza A
中科院分区:
医学3区
文献类型:
--
作者:
Casucci M;Bondanza A

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嵌合抗原受体(CARS)是由单抗(MAb)的抗原结合基序与T细胞受体(TCR)的信号转导机制融合而成。用肿瘤相关抗原(TAAs)的嵌合受体对T淋巴细胞进行基因修饰,可以将T淋巴细胞重定向到肿瘤细胞。CAR重定向T细胞的临床经验表明,抗肿瘤效果与一定程度的毒性有关,特别是当TAA表达与健康组织共享时。这种情况与异基因造血干细胞移植(HSCT)非常相似,在HSCT中,异基因识别既会导致移植物抗白血病(GVL)效应,也会导致移植物抗宿主病(GVHD)。自杀基因治疗,即将条件自杀表型基因诱导到供者T细胞,使GVL效应与GVHD分离。因此,对CAR重定向的T细胞应用自杀基因修饰可能会极大地提高它们的安全性,并促进它们的临床发展。
Chimeric antigen receptors (CARs) are generated by fusing the antigen-binding motif of a monoclonal antibody (mAb) with the signal transduction machinery of the T-cell receptor (TCR). The genetic modification of T lymphocytes with chimeric receptors specific for tumor-associated antigens (TAAs) allows for the redirection towards tumor cells. Clinical experience with CAR-redirected T cells suggests that antitumor efficacy associates with some degree of toxicity, especially when TAA expression is shared with healthy tissues. This situation closely resembles the case of allogeneic hematopoietic stem cell transplantation (HSCT), wherein allorecognition causes both the graft-versus-leukemia (GVL) effect and graft-versus-host disease (GVHD). Suicide gene therapy, i.e. the genetic induction of a conditional suicide phenotype into donor T cells, enables dissociating the GVL effect from GVHD. Applying suicide gene modification to CAR-redirected T cells may therefore greatly increase their safety profile and facilitate their clinical development.
病毒特异性的T细胞设计为共表达肿瘤特异性受体:神经母细胞瘤个体中的持久性和抗肿瘤活性。
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