Ultrasmall Silica-Based Bismuth Gadolinium Nanoparticles for Dual Magnetic Resonance-Computed Tomography Image Guided Radiation Therapy.

Ultrasmall Silica-Based Bismuth Gadolinium Nanoparticles for Dual Magnetic Resonance-Computed Tomography Image Guided Radiation Therapy.
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用于双磁共振-计算机断层成像引导放射治疗的超小硅基铋钆纳米颗粒。

DOI:
10.1021/acs.nanolett.6b05055
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发表时间:
2017-03-08
期刊:
影响因子:
10.8
通讯作者:
Berbeco R
Berbeco R
中科院分区:
材料科学1区
文献类型:
--
作者:
Detappe A;Thomas E;Tibbitt MW;Kunjachan S;Zavidij O;Parnandi N;Reznichenko E;Lux F;Tillement O;Berbeco R

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选择性杀死癌细胞,同时最大限度地减少对健康组织的损害是临床放射治疗的目标。通过图像引导的放射治疗和癌细胞的选择性放射增敏可以提高这种治疗率。在这里,我们设计并测试了一种由铋和钆制成的新型三峰治疗诊断纳米颗粒,用于现场放射增敏和图像对比度增强,以提高放射治疗的功效和准确性。我们在临床放射治疗期间的非小细胞肺癌模型中证明了体内磁共振(MR)、计算机断层扫描(CT)对比度增强和肿瘤抑制以及延长的生存期。组织学研究表明纳米颗粒或辐射造成的脱靶毒性极小。通过模仿现有的临床工作流程,我们证明铋钆纳米粒子与当前 CT 引导的放射治疗和新兴的 MR 引导方法高度兼容。这项研究报告了使用新型治疗诊断纳米粒子进行图像引导放射治疗的第一个体内原理验证。
Selective killing of cancer cells while minimizing damage to healthy tissues is the goal of clinical radiation therapy. This therapeutic ratio can be improved by image-guided radiation delivery and selective radiosensitization of cancer cells. Here, we have designed and tested a novel trimodal theranostic nanoparticle made of bismuth and gadolinium for on-site radiosensitization and image contrast enhancement to improve the efficacy and accuracy of radiation therapy. We demonstrate in vivo magnetic resonance (MR), computed tomography (CT) contrast enhancement, and tumor suppression with prolonged survival in a non-small cell lung carcinoma model during clinical radiation therapy. Histological studies show minimal off-target toxicities due to the nanoparticles or radiation. By mimicking existing clinical workflows, we show that the bismuth–gadolinium nanoparticles are highly compatible with current CT-guided radiation therapy and emerging MR-guided approaches. This study reports the first in vivo proof-of-principle for image-guided radiation therapy with a new class of theranostic nanoparticles.
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