A Dual Tracer 18F-FCH/18F-FDG PET Imaging of an Orthotopic Brain Tumor Xenograft Model

Yilong Fu, Lai-Chun Ong, Sudhir H. Ranganath, Lin Zheng, Irene Kee, Wenbo Zhan, Sidney Yu, Pierce K. H. Chow, Chi-Hwa Wang, Russell R. Lonser (Editor)

Research output: Contribution to journalArticle

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Abstract

Early diagnosis of low grade glioma has been a challenge to clinicians. Positron Emission Tomography (PET) using 18F-FDG as a radio-tracer has limited utility in this area because of the high background in normal brain tissue. Other radiotracers such as 18F-Fluorocholine (18F-FCH) could provide better contrast between tumor and normal brain tissue but with high incidence of false positives. In this study, the potential application of a dual tracer 18F-FCH/18F-FDG-PET is investigated in order to improve the sensitivity of PET imaging for low grade glioma diagnosis based on a mouse orthotopic xenograft model. BALB/c nude mice with and without orthotopic glioma xenografts from U87 MG-luc2 glioma cell line are used for the study. The animals are subjected to 18F-FCH and 18F-FDG PET imaging, and images acquired from two separate scans are superimposed for analysis. The 18F-FCH counts are subtracted from the merged images to identify the tumor. Micro-CT, bioluminescence imaging (BLI), histology and measurement of the tumor diameter are also conducted for comparison. Results show that there is a significant contrast in 18F-FCH uptake between tumor and normal brain tissue (2.65 ± 0.98), but with a high false positive rate of 28.6%. The difficulty of identifying the tumor by 18F-FDG only is also proved in this study. All the tumors can be detected based on the dual tracer technique of 18F-FCH/ 18F-FDG-PET imaging in this study, while the false-positive caused by 18F-FCH can be eliminated. Dual tracer 18F-FCH/18F-FDG PET imaging has the potential to improve the visualization of low grade glioma. 18F-FCH delineates tumor areas and the tumor can be identified by subtracting the 18F-FCH counts. The sensitivity was over 95%. Further studies are required to evaluate the possibility of applying this technique in clinical trials.

Original languageEnglish
Article numbere0148123
JournalPloS ONE
Volume11
Issue number2
DOIs
Publication statusPublished - 4 Feb 2016

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positron-emission tomography
Positron emission tomography
Fluorodeoxyglucose F18
Heterografts
Brain Neoplasms
Positron-Emission Tomography
tracer techniques
Tumors
Brain
image analysis
brain
Imaging techniques
neoplasms
Glioma
Neoplasms
Tissue
micro-computed tomography
bioluminescence
fluorocholine
early diagnosis

Cite this

Fu, Y., Ong, L-C., Ranganath, S. H., Zheng, L., Kee, I., Zhan, W., ... Lonser, R. R. (Ed.) (2016). A Dual Tracer 18F-FCH/18F-FDG PET Imaging of an Orthotopic Brain Tumor Xenograft Model. PloS ONE, 11(2), [e0148123]. https://doi.org/10.1371/journal.pone.0148123

A Dual Tracer 18F-FCH/18F-FDG PET Imaging of an Orthotopic Brain Tumor Xenograft Model. / Fu, Yilong; Ong, Lai-Chun; Ranganath, Sudhir H.; Zheng, Lin; Kee, Irene; Zhan, Wenbo; Yu, Sidney; Chow, Pierce K. H.; Wang, Chi-Hwa; Lonser, Russell R. (Editor).

In: PloS ONE, Vol. 11, No. 2, e0148123, 04.02.2016.

Research output: Contribution to journalArticle

Fu, Y, Ong, L-C, Ranganath, SH, Zheng, L, Kee, I, Zhan, W, Yu, S, Chow, PKH, Wang, C-H & Lonser, RR (ed.) 2016, 'A Dual Tracer 18F-FCH/18F-FDG PET Imaging of an Orthotopic Brain Tumor Xenograft Model', PloS ONE, vol. 11, no. 2, e0148123. https://doi.org/10.1371/journal.pone.0148123
Fu, Yilong ; Ong, Lai-Chun ; Ranganath, Sudhir H. ; Zheng, Lin ; Kee, Irene ; Zhan, Wenbo ; Yu, Sidney ; Chow, Pierce K. H. ; Wang, Chi-Hwa ; Lonser, Russell R. (Editor). / A Dual Tracer 18F-FCH/18F-FDG PET Imaging of an Orthotopic Brain Tumor Xenograft Model. In: PloS ONE. 2016 ; Vol. 11, No. 2.
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