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发表于 2013-8-7 11:47:35
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[Title]: Monoclonal TCR-redirected tumor cell killing
[Authors]:Nathaniel Liddy, Giovanna Bossi, Katherine J Adams, Anna Lissina, Tara M Mahon, Namir J Hassan,Jessie Gavarret, Frayne C Bianchi, Nicholas J Pumphrey, Kristin Ladell, Emma Gostick, Andrew K Sewell, Nikolai M Lissin, Naomi E Harwood, Peter E Molloy, Yi Li, Brian J Cameron, Malkit Sami,Emma E Baston, Penio T Todorov, Samantha J Paston, Rebecca E Dennis, Jane V Harper, Steve M Dunn, Rebecca Ashfield et al.
[Abstract]: T cell immunity can potentially eradicate malignant cells and lead to clinical remission in a minority of patients with cancer. In the majority of these individuals, however, there is a failure of the specific T cell receptor (TCR)–mediated immune recognition and activation process. Here we describe the engineering and characterization of new reagents termed immune-mobilizing monoclonal TCRs against cancer (ImmTACs).Four such ImmTACs, each comprising a distinct tumor-associated epitope-specific monoclonal TCR with picomolar affinity fused to a humanized cluster of differentiation 3 (CD3)-specific single-chain antibody fragment (scFv), effectively redirected T cells to kill cancer cells expressing extremely low surface epitope densities. Furthermore, these reagents potently suppressed tumor growth in vivo. Thus, ImmTACs overcome immune tolerance to cancer and represent a new approach to tumor immunotherapy.
【题目】单克隆TCR重新介导杀伤肿瘤细胞
【译文】T细胞免疫可以潜在的清楚恶心肿瘤细胞,缓解少数癌症患者的临床症状。而在大部分患者中,特异性T细胞受体(TCR)介导的免疫识别和激活过程并不能发挥这种作用。本研究描述了一些被称为免疫动员单克隆TCR抗癌(ImmTACs)新药的设计及其相关特征。 有四种这样的ImmTACs,每种均具有独特的肿瘤相关表面特异性单克隆TCR,它与人源化CD3特异性单链抗体片段紧密融合,有效重新介导T细胞杀死肿瘤细胞,即使在表面表位密度极低的情况下,在体内实验中发挥出强烈抑制肿瘤生长的效果。因此,ImmTACs克服了肿瘤免疫耐受的问题,是一种肿瘤免疫治疗的新方法 |
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