Magnetic Resonance Imaging-Guided Focused Ultrasound-Based Delivery of Radiolabeled Copper Nanoclusters to Diffuse Intrinsic Pontine Glioma.
Xiaohui ZhangDezhuang YeLihua YangYimei YueDeborah SultanChristopher Pham PaciaHannah PangLisa DeteringGyu Seong HeoHannah LuehmannAnkur ChoksiAbhishek SethiDavid D LimbrickOren J BecherYuan-Chuan TaiJoshua B RubinHong ChenYongjian LiuPublished in: ACS applied nano materials (2020)
Diffuse intrinsic pontine glioma (DIPG) is an invasive pediatric brainstem malignancy exclusively in children without effective treatment due to the often-intact blood-brain tumor barrier (BBTB), an impediment to the delivery of therapeutics. Herein, we used focused ultrasound (FUS) to transiently open BBTB and delivered radiolabeled nanoclusters (64Cu-CuNCs) to tumors for positron emission tomography (PET) imaging and quantification in a mouse DIPG model. First, we optimized FUS acoustic pressure to open the blood-brain barrier (BBB) for effective delivery of 64Cu-CuNCs to pons in wildtype mice. Then the optimized FUS pressure was used to deliver radiolabeled agents in DIPG mouse. Magnetic resonance imaging (MRI)-guided FUS-induced BBTB opening was demonstrated using a low molecular weight, short-lived 68Ga-DOTA-ECL1i radiotracer and PET/CT before and after treatment. We then compared the delivery efficiency of 64Cu-CuNCs to DIPG tumor with and without FUS treatment and demonstrated the FUS-enhanced delivery and time-dependent diffusion of 64Cu-CuNCs within the tumor.
Keyphrases
- pet ct
- positron emission tomography
- pet imaging
- magnetic resonance imaging
- computed tomography
- contrast enhanced
- minimally invasive
- small molecule
- blood brain barrier
- metal organic framework
- sensitive detection
- aqueous solution
- diffusion weighted imaging
- low grade
- skeletal muscle
- drug induced
- diabetic rats
- fluorescent probe
- smoking cessation