Biosci Rep:研究揭示microRNA-340抑制骨肉瘤的机制

2018-09-11 MedSci MedSci原创

骨肉瘤(OS)是原发性骨癌最常见的组织学形式,常见于青少年和年轻人。本研究旨在通过靶向β-catenin(钙粘蛋白相关蛋白)1(CTNNB1)调控Notch信号通路,探讨microRNA-340(miR-340)对OS细胞增殖、侵袭、迁移和凋亡的调节作用。 研究收集45名患者的OS组织和45名截肢者的正常股骨头组织。将细胞分配到不同的组。进行原位杂交以确定miR-340表达的阳性率,而免疫组

骨肉瘤(OS)是原发性骨癌最常见的组织学形式,常见于青少年和年轻人。本研究旨在通过靶向β-catenin(钙粘蛋白相关蛋白)1(CTNNB1)调控Notch信号通路,探讨microRNA-340(miR-340)对OS细胞增殖、侵袭、迁移和凋亡的调节作用。

研究收集45名患者的OS组织和45名截肢者的正常股骨头组织。将细胞分配到不同的组。进行原位杂交以确定miR-340表达的阳性率,而免疫组织化学用于确定CTNNB1和B细胞淋巴瘤2(Bcl-2)的阳性率。使用一系列实验来测量相关因子的表达,并分别评估细胞增殖、迁移、侵袭、周期和凋亡的速率。

结果显示,miR-340在正常组织中表达的水平高于OS组织。OS组织中,Notch、CTNNB1、分裂1(Hes1),Bcl-2、Runt相关转录因子2(Runx2)和骨钙素蛋白的表达增加,miR-340、Bcl-2相互作用的细胞死亡介质(BIM)和Bcl-2相关蛋白X(Bax)减少。U-2OS细胞系具有最高的miR-340表达。此外,miR-340的上调增加了miR-340、BIM和Bax的表达,但降低了Notch、CTNNB1、Hes1、Bcl-2、Runx2和骨钙蛋白的表达。miR-340p的上调导致细胞凋亡增加,抑制细胞增殖、迁移和侵袭。

综上所述,该研究结果表明miR-340的过表达可以抑制OS细胞的增殖、迁移和侵袭,并通过下调CTNNB1使Notch信号通路失活来促进OS细胞凋亡。功能性miR-340过表达可能是OS的未来治疗策略。

原始出处:

Bao-Long Pan, Ling Wu, et al., Up-regulation of microRNA-340 promotes osteosarcoma cell apoptosis while suppressing proliferation, migration, and invasion by inactivating the CTNNB1-mediated Notch signaling pathway. Biosci Rep. 2018 Aug 31; 38(4): BSR20171615.

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    2019-01-31 sunylz
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    2019-05-03 xjy02
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    2018-09-13 zhouqu_8
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    2018-09-11 惠映实验室

    学习了,谢谢分享。

    0