Pre-clinical imaging of transgenic mouse models of neuroblastoma using a dedicated 3-element solenoid coil on a clinical 3T platform.
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Date
2017-09-05Author
Almeida, GS
Panek, R
Hallsworth, A
Webber, H
Papaevangelou, E
Boult, JK
Jamin, Y
Chesler, L
Robinson, SP
Type
Journal Article
Metadata
Show full item recordAbstract
BACKGROUND: The use of clinical MRI scanners to conduct pre-clinical research facilitates comparisons with clinical studies. Here the utility and sensitivity of anatomical and functional MRI data/biomarkers acquired from transgenic mouse models of neuroblastoma using a dedicated radiofrequency (RF) coil on a clinical 3T scanner was evaluated. METHODS: Multiparametric MRI of transgenic mice bearing abdominal neuroblastomas was performed at 3T, and data cross-referenced to that acquired from the same mice on a pre-clinical 7T MRI system. T2-weighted imaging, quantitation of the native longitudinal relaxation time (T1) and the transverse relaxation rate (R2*), and dynamic contrast-enhanced (DCE)-MRI, was used to assess tumour volume, phenotype and response to cyclophosphamide or cabozantinib. RESULTS: Excellent T2-weighted image contrast enabled clear tumour delineation at 3T. Significant correlations of tumour volume (R=0.98, P<0.0001) and R2* (R=0.87, P<0.002) measured at 3 and 7T were established. Mice with neuroblastomas harbouring the anaplastic lymphoma kinase mutation exhibited a significantly slower R2* (P<0.001), consistent with impaired tumour perfusion. DCE-MRI was performed simultaneously on three transgenic mice, yielding estimates of Ktrans for each tumour (median Ktrans values of 0.202, 0.168 and 0.114 min-1). Cyclophosphamide elicited a significant reduction in both tumour burden (P<0.002) and native T1 (P<0.01), whereas cabozantinib induced significant (P<0.01) tumour growth delay. CONCLUSIONS: Simultaneous multiparametric MRI of multiple tumour-bearing animals using this coil arrangement at 3T can provide high efficiency/throughput for both phenotypic characterisation and evaluation of novel therapeutics, and facilitate the introduction of functional MRI biomarkers into aligned imaging-embedded clinical trials.
Subject
Animals
Mice, Transgenic
Mice
Neuroblastoma
Stomach Neoplasms
Disease Models, Animal
Anilides
Cyclophosphamide
Pyridines
Receptor Protein-Tyrosine Kinases
Antineoplastic Agents
Contrast Media
Magnetic Resonance Imaging
Tumor Burden
Phantoms, Imaging
Phenotype
Mutation
Female
Male
Signal-To-Noise Ratio
Magnets
N-Myc Proto-Oncogene Protein
Anaplastic Lymphoma Kinase
Research team
Paediatric Solid Tumour Biology and Therapeutics
Pre-Clinical MRI
Language
eng
Date accepted
2017-07-06
License start date
2017-09
Citation
British journal of cancer, 2017, 117 (6), pp. 791 - 800
Publisher
NATURE PUBLISHING GROUP