Rapid, site-specific labeling of "off-the-shelf" and native serum autoantibodies with T cell-redirecting domains.

Rapid, site-specific labeling of "off-the-shelf" and native serum autoantibodies with T cell-redirecting domains.
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DOI:
10.1126/sciadv.abn4613
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发表时间:
2022-05-06
期刊:
影响因子:
13.6
通讯作者:
--
中科院分区:
综合性期刊1区
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广泛的抗体工程和克隆通常需要产生新的双特异性抗体。定制基因、先进的表达系统和高效的克隆可以简化和加速这一过程,但在实现功能性产品之前仍可能需要数月时间。我们开发了一种简单的方法,可以位点特异性和共价地将T细胞重定向结构域连接到任何现成的人免疫球蛋白G (IgG)或从血清中分离的天然IgG上。不需要抗体工程、克隆或抗体序列知识。双特异性抗体在几小时内产生。通过标记从荷瘤小鼠中分离的抗体,包括两种同基因模型,我们产生了T细胞重定向自身抗体(TRAAbs),作为一种有效的治疗方法。TRAAbs优先结合肿瘤组织而不是健康组织,表明以前未探索的治疗窗口。使用自身抗体来指导双特异性抗体靶向肿瘤代表了个性化医疗的新范式,消除了识别肿瘤生物标志物的需要。从天然抗体中容易产生双特异性抗体为癌症治疗开辟了可能性。
Extensive antibody engineering and cloning is typically required to generate new bispecific antibodies. Made-to-order genes, advanced expression systems, and high-efficiency cloning can simplify and accelerate this process, but it still can take months before a functional product is realized. We developed a simple method to site-specifically and covalently attach a T cell–redirecting domain to any off-the-shelf, human immunoglobulin G (IgG) or native IgG isolated from serum. No antibody engineering, cloning, or knowledge of the antibody sequence is required. Bispecific antibodies are generated in just hours. By labeling antibodies isolated from tumor-bearing mice, including two syngeneic models, we generated T cell–redirecting autoantibodies (TRAAbs) that act as an effective therapeutic. TRAAbs preferentially bind tumor tissue over healthy tissue, indicating a previously unexplored therapeutic window. The use of autoantibodies to direct the tumor targeting of bispecific antibodies represents a new paradigm in personalized medicine that eliminates the need to identify tumor biomarkers. The facile production of bispecific antibodies from native antibodies opens possibilities for cancer therapy.
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