HDL nanoparticles targeting sonic hedgehog subtype medulloblastoma.

HDL nanoparticles targeting sonic hedgehog subtype medulloblastoma.
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靶向声波刺猬亚型髓母细胞瘤的HDL纳米颗粒。

DOI:
10.1038/s41598-017-18100-8
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发表时间:
2018-01-19
期刊:
影响因子:
4.6
通讯作者:
Platanias LC
Platanias LC
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Bell JB;Rink JS;Eckerdt F;Clymer J;Goldman S;Thaxton CS;Platanias LC

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髓母细胞瘤是最常见的儿科恶性脑癌,需要新的靶向治疗方法来更有效地治疗这些恶性肿瘤,这些肿瘤可分为四种分子亚型。在这里,我们重点关注音刺猬 (SHH) 亚型髓母细胞瘤,该亚型约占所有病例的 25%。 SHH 亚型依赖于肿瘤生长和肿瘤起始癌症干细胞 (CSC) 维持的胆固醇信号传导。为了靶向胆固醇信号传导,我们采用了仿生高密度脂蛋白纳米颗粒 (HDL NP),它与 ​​HDL 受体、B-1 型清道夫受体 (SCARB1) 结合,剥夺细胞的天然 HDL 及其胆固醇负载。我们证明了表达 SCARB1 的髓母细胞瘤细胞中 HDL NP 的摄取以及癌细胞中胆固醇水平的消耗。 HDL NP 有效阻止髓母细胞瘤细胞以及刺猬驱动的尤文肉瘤细胞的增殖。此外,HDL NP 破坏了髓母细胞瘤中的集落形成,并耗尽了髓母细胞瘤和尤文肉瘤中的 CSC 群。总而言之,我们的研究结果为开发一种使用 HDL NP 治疗髓母细胞瘤的新型靶向方法提供了原理证明。这些发现表明,HDL 模拟纳米粒子是治疗声波刺猬 (SHH) 亚型髓母细胞瘤和可能其他刺猬驱动的癌症的一种有前途的疗法。
Medulloblastoma is the most common paediatric malignant brain cancer and there is a need for new targeted therapeutic approaches to more effectively treat these malignant tumours, which can be divided into four molecular subtypes. Here, we focus on targeting sonic hedgehog (SHH) subtype medulloblastoma, which accounts for approximately 25% of all cases. The SHH subtype relies upon cholesterol signalling for tumour growth and maintenance of tumour-initiating cancer stem cells (CSCs). To target cholesterol signalling, we employed biomimetic high-density lipoprotein nanoparticles (HDL NPs) which bind to the HDL receptor, scavenger receptor type B-1 (SCARB1), depriving cells of natural HDL and their cholesterol cargo. We demonstrate uptake of HDL NPs in SCARB1 expressing medulloblastoma cells and depletion of cholesterol levels in cancer cells. HDL NPs potently blocked proliferation of medulloblastoma cells, as well as hedgehog-driven Ewing sarcoma cells. Furthermore, HDL NPs disrupted colony formation in medulloblastoma and depleted CSC populations in medulloblastoma and Ewing sarcoma. Altogether, our findings provide proof of principle for the development of a novel targeted approach for the treatment of medulloblastoma using HDL NPs. These findings present HDL-mimetic nanoparticles as a promising therapy for sonic hedgehog (SHH) subtype medulloblastoma and possibly other hedgehog-driven cancers.
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