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首页> 外文期刊>Molecular Therapy - Methods & Clinical Development >Enhanced Expression of Anti-CD19 Chimeric Antigen Receptor in piggyBac Transposon-Engineered T Cells
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Enhanced Expression of Anti-CD19 Chimeric Antigen Receptor in piggyBac Transposon-Engineered T Cells

机译:增强杀菌转座工程工程T细胞抗CD19嵌合抗原受体的表达

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摘要

Adoptive T?cell therapy using chimeric antigen receptor (CAR)-modified T?cells is a promising cancer immunotherapy. We previously developed a non-viral method of gene transfer into T?cells using a piggyBac transposon system to improve the cost-effectiveness of CAR-T cell therapy. Here, we have further improved our technology by a novel culture strategy to increase the transfection efficiency and to reduce the time of T?cell manufacturing. Using a CH2CH3-free CD19-specific CAR transposon vector and combining irradiated activated T?cells (ATCs) as feeder cells and virus-specific T?cell receptor (TCR) stimulation, we achieved 51.4%?± 14% CARsup+/sup T?cells and 2.8-fold expansion after 14 culture days. Expanded CD19.CAR-T cells maintained a significant fraction of CD45RAsup+/supCCR7sup+/sup T?cells and demonstrated potent antitumor activity against CD19sup+/sup leukemic cells both in?vitro and in?vivo . Therefore, piggyBac -based gene transfer may provide an alternative to viral gene transfer for CAR-T cell therapy.
机译:使用嵌合抗原受体(轿车)的电池疗法 - 制定的T 2细胞是一种有前途的癌症免疫疗法。我们之前使用Piggybac转发系统开发了一种基因转移的非病毒方法,以提高Car-T细胞疗法的成本效益。在这里,我们通过新颖的文化策略进一步提高了我们的技术,以提高转染效率并减少T 2细胞制造的时间。使用CH2CH3无CD19特异性汽车转座子载体并将辐照激活的T→细胞(ATCs)作为饲养细胞和病毒特异性的T?细胞受体(TCR)刺激,我们达到51.4%?±14%的汽车 + t?14个培养日后细胞和2.8倍的膨胀。扩增的CD19.Car-T细胞保持了CD45ra + CCR7 + T 2细胞的显着级分,并证明了对CD19 + 白血病细胞的有效抗肿瘤活性两者都在?体外和体内。因此,基于PiggyBac的基因转移可以为Car-T细胞疗法提供病毒基因转移的替代方案。

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