Blood Cancer J:外泌体通过靶向破骨细胞和成骨细胞在多发性骨髓瘤骨病和肿瘤发展中起作用

2018-11-12 MedSci MedSci原创

多发性骨髓瘤(MM)的进展在很大程度上取决于骨髓(BM)微环境,其中通过包括细胞外囊泡在内的不同因素之间的通信。这种串扰不仅导致耐药性,而且导致骨质溶解的发展。因此,靶向囊泡分泌可以同时改善药物反应和骨病。在本文中,我们使用5TGM1鼠模型检查了MM外泌体对骨溶解的影响。结果发现,在体外5TGM1 sEVs或'exosomes'不仅增强了破骨细胞活性,还阻断了成骨细胞分化和功能。从机制上讲,我们发

多发性骨髓瘤(MM)的进展在很大程度上取决于骨髓(BM)微环境,其中通过包括细胞外囊泡在内的不同因素之间的通信。这种串扰不仅导致耐药性,而且导致骨质溶解的发展。因此,靶向囊泡分泌可以同时改善药物反应和骨病。

在本文中,我们使用5TGM1鼠模型检查了MM外泌体对骨溶解的影响。结果发现,在体外5TGM1 sEVs或'exosomes'不仅增强了破骨细胞活性,还阻断了成骨细胞分化和功能。从机制上讲,我们发现DKK-1的转移导致成骨细胞中Runx2,Osterix和Collagen 1A1的表达减少。在体内,我们发现5TGM1外泌体可以以与MM细胞本身相似的模式诱导骨溶解。使用鞘磷脂酶抑制剂GW4869阻断外泌体分泌不仅增加皮质骨体积,而且还使骨髓瘤细胞对硼替佐米敏感,当GW4869和硼替佐米结合时导致强烈的抗肿瘤反应。

总之,我们的结果表明外泌体在BM微环境中的重要作用,并提出了抗骨髓瘤治疗的新治疗靶点。

原始出处:

Sylvia Faict, Joséphine Muller, et al., Exosomes play a role in multiple myeloma bone disease and tumor development by targeting osteoclasts and osteoblasts. Blood Cancer J. 2018 Nov; 8(11): 105.

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    2018-11-14 zhaojie88
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