Blood:创新药物MIR17PTi,miR-17-92前体抑制剂,在多发性骨髓瘤中的应用

2018-07-13 MedSci MedSci原创

MicroRNA-17-92(MiR-17-92)具有致癌性,是c-MYC(MYC)驱动的恶性肿瘤的一个极具潜力的治疗靶点。Eugenio Morelli等人开发了一种新型LNA gaomeR反义寡核苷酸(ASOs),来诱导RNase H介导降解MIR17HG初级转录本,进而抑制miR-17-92s的生成。主要的LNA-ASO(MIR17PTi)可通过靶向反义活性抑制48种实体瘤和血液瘤的癌细胞系

MicroRNA-17-92(MiR-17-92)具有致癌性,是c-MYC(MYC)驱动的恶性肿瘤的一个极具潜力的治疗靶点。Eugenio Morelli等人开发了一种新型LNA gaomeR反义寡核苷酸(ASOs),来诱导RNase H介导降解MIR17HG初级转录本,进而抑制miR-17-92s的生成。

主要的LNA-ASO(MIR17PTi)可通过靶向反义活性抑制48种实体瘤和血液瘤的癌细胞系增殖,相比miR-17-92s抑制剂效果更显著。

进一步针对多发性骨髓瘤(MM)进行研究时发现MIR17PTi可通过破坏患者来源的MM细胞的自我平衡的MYC/miR-17-92正反馈环(FFLs)来触发细胞凋亡,并诱导MYC依赖性的合成性致死。

此外,研究人员还发现在MM细胞中,以BIM为中心的FFL发生改变有助于MIR17TPi诱导细胞毒性。MIR17PTi在MM的临床相关小鼠模型(NOD-SCID小鼠)中表现出较强的抗肿瘤活性,并在非人类的灵长类动物中具有有利的安全性和药代动力学特征。

总而言之,MIR17PTi是一种新型药物,动物学实验已证实其具有抗肿瘤活性,需进一步开展临床试验评估其用于MM和其他MYC驱动的恶性肿瘤的疗效和安全性。

原始出处:

Eugenio Morelli, et al. Therapeutic vulnerability of multiple myeloma to MIR17PTi, a first-in-class inhibitor of pri-mir-17-92. Blood  2018  :blood-2018-03-836601;  doi: https://doi.org/10.1182/blood-2018-03-836601 

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    2019-03-21 jml2009
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    2018-08-01 smallant2002
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    2018-09-07 jklm09
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    2018-07-17 kafei

    学习学习谢谢

    0

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