Targeted delivery of heat shock protein 90 inhibitors prevents growth of HER2-positive tumor.

Targeted delivery of heat shock protein 90 inhibitors prevents growth of HER2-positive tumor.
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靶向递送热休克蛋白90抑制剂可预防HER2阳性肿瘤的生长。

DOI:
10.1016/j.biomaterials.2021.120817
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发表时间:
2021-06
期刊:
影响因子:
14
通讯作者:
Won YW
Won YW
中科院分区:
工程技术1区
文献类型:
--
作者:
Lim KS;Lee DY;Han S;Bull DA;Won YW

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热休克蛋白90(HSP90)对癌细胞的生存起着至关重要的作用。当抑制物阻断HSP90的信号通路时,其客户蛋白被降解、不稳定和失活。尽管HSP90抑制剂正在进行各种临床试验,但由于HSP90抑制剂的化学修饰困难,目前还没有HSP90抑制剂-免疫结合物。在这里,我们展示了生物亲和结合使热休克蛋白90抑制剂能够与抗体结合,而不需要化学结合。我们构建了由抗HER2单链抗体和HSP90抑制物结合结构域(HER2 scFv-HBD)组成的重组融合蛋白。HBD自发捕获HSP90抑制剂,导致HER2 ScFv-HBD/HSP90抑制剂复合体的形成。在HER2阳性的癌症小鼠模型中,HSP90抑制剂的靶向递送得到证实,并观察到抗癌效果的改善。我们已经证明了肿瘤导向的HSP90抑制作为一种新的靶向治疗形式的前景。
Heat shock protein 90 (HSP90) plays a crucial role in the survival of cancer cells. When an inhibitor blocks the signaling pathway of HSP90, its client proteins are degraded, destabilized, and inactivated. Although HSP90 inhibitors are in various clinical trials, there are no HSP90 inhibitor-immunoconjugates due to the difficulty in chemical modification of HSP90 inhibitors. Here we show that biological affinity binding enables the incorporation of HSP90 inhibitors to an antibody without the need for chemical conjugation. We constructed a recombinant fusion protein composed of an anti-HER2 scFv and an HSP90 inhibitor-binding domain (HER2 scFv-HBD). The HBD spontaneously captures a HSP90 inhibitor, resulting in the formation of an HER2 scFv-HBD/HSP90 inhibitor complex. In an HER2-positive cancer mouse model, targeted delivery of HSP90 inhibitors was confirmed and improved anti-cancer efficacy was observed. We have proven the promise of tumor-directed HSP90 inhibition as a new form of targeted therapy.
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