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Glucose Metabolism Gene Expression Patterns and Tumor Uptake of 18F- Fluorodeoxyglucose After Radiation Treatment George D. Wilson, PhD, Bryan J. Thibodeau, PhD, Laura E. Fortier, MS, Barbara L. Pruetz, BS, Sandra Galoforo, MS, Andrew M. Baschnagel, MD, John Chunta, PhD, Ching Yee Oliver Wong, MD, Di Yan, PhD, Brian Marples, PhD, Jiayi Huang, MD International Journal of Radiation Oncology • Biology • Physics Volume 90, Issue 3, Pages (November 2014) DOI: /j.ijrobp Copyright © 2014 Elsevier Inc. Terms and Conditions
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Fig. 1 Tumor growth and changes in positron emission tomography (PET) parameters in response to irradiation. (A) Growth curves for control (solid line) and tumors irradiated with 15 Gy (dotted lines). (B) Typical 18F-fluorodeoxyglucose-PET images of a control tumor xenograft (upper) at day 10 and an irradiated tumor (lower) at day 12. The tumors display the contouring used to assess core and periphery PET signals. (C) Changes in kinetic index (Ki) as a function of time after treatment in controls (solid lines) and irradiated tumors (dotted line). (D-F) Same a C except for retention index, sensitivity factor, and maximum standardized uptake value (SUVmax), respectively. All data are mean ± SEM. International Journal of Radiation Oncology • Biology • Physics , DOI: ( /j.ijrobp ) Copyright © 2014 Elsevier Inc. Terms and Conditions
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Fig. 2 Changes in GLUT1 (A) protein levels after radiation treatment. The solid lines represent control tumors, whereas the dotted lines are tumors irradiated with 15 Gy. The lower panel shows representative immunohistochemical staining of tumors for a control (B), day 12 after irradiation (C), and day 21 after irradiation (D). International Journal of Radiation Oncology • Biology • Physics , DOI: ( /j.ijrobp ) Copyright © 2014 Elsevier Inc. Terms and Conditions
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Fig. 3 Changes in HK2 (A) protein levels after radiation treatment. The solid lines represent control tumors, whereas the dotted lines are tumors irradiated with 15 Gy. The lower panel shows representative immunohistochemical staining of tumors for a control (B), day 7 after irradiation (C), and day 21 after irradiation (D). International Journal of Radiation Oncology • Biology • Physics , DOI: ( /j.ijrobp ) Copyright © 2014 Elsevier Inc. Terms and Conditions
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Fig. 4 Correlation between changes in kinetic index (Ki) and GLUTI (A) and HK2 (B) protein levels after irradiation. The open symbols represent the mean values for each time point after irradiation (Δ) or sham irradiation (O), whereas the closed symbols represent the individual data points for irradiated (▲) and nonirradiated (●) tumors. International Journal of Radiation Oncology • Biology • Physics , DOI: ( /j.ijrobp ) Copyright © 2014 Elsevier Inc. Terms and Conditions
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