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Clin Cancer Res:VLA4靶向纳米颗粒可有效靶向治疗耐药的难治性骨髓瘤!

2021-02-19 Nebula MedSci原创

在多发性骨髓瘤中,耐药细胞是化疗后复发或进展的基础。细胞粘附介导的耐药性(CAM-DR)是骨髓瘤细胞(MMC)在化疗后生存的一种既定机制,其标志物在残留病灶中表达上调。

在多发性骨髓瘤中,耐药细胞是化疗后复发或进展的基础。细胞粘附介导的耐药性(CAM-DR)是骨髓瘤细胞(MMC)在化疗后生存的一种既定机制,其标志物在残留病灶中表达上调。整合素甚晚期抗原4(Vla4;α4β1)是CAM-DR的关键调节因子,其表达可影响MMC对药物的敏感性。

在该研究中,Francesca等人假设或许可以利用耐药MMC的VLA4上调来靶向输送药物,这或有助于提高治疗的安全性和有效性。

分子结构和模式图

Francesca等人合成了一种20 nm的VLA4靶向胶束纳米粒(V-NP),携带了用于示踪的DiI或一种新型喜树碱药物前体(V-CP)。在人或鼠MMC细胞以及原位多发性骨髓瘤小鼠模型中评估NP的靶向传递和治疗活性。

不同处理方式的骨髓瘤小鼠预后

研究结果显示,无论是在体内还是体外,V-NP均可选择性地将其负载的物质传递给MMC,化疗可增加活的MMC对V-NP的摄取。单用V-CP或与美法仑联合使用在骨髓瘤小鼠模型中的耐受性均表现良好,并延长了小鼠的存活时间。V-CP还可在不增加总体毒性的情况下,降低美法仑的剂量需求,减轻了与次优剂量相关的肿瘤负担。

综上,V-CP可能是预防或治疗复发或难治性骨髓瘤的一种安全有效的策略。V-NP靶向耐药细胞可能为治疗环境诱导耐药的癌症的提供了一种新的途径。

原始出处:

Fontana Francesca,Scott Michael J,Allen John S et al. VLA4-Targeted Nanoparticles Hijack Cell Adhesion-Mediated Drug Resistance to Target Refractory Myeloma Cells and Prolong Survival. Clin Cancer Res, 2020, 10.1158/1078-0432.CCR-20-2839

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    2021-02-21 freve
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    2021-02-19 ms6000001236844761

    学习了

    0

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    2021-02-19 ms2000002063028856

    学习

    0

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