Supplementary Data from Assessment of Tumor Redox Status through (S)-4-(3-[18F]fluoropropyl)-L-Glutamic Acid PET Imaging of System xc− Activity

Supplementary Methods and Figures 1 - 6. Fig. S1 shows effect of TBHP treatment on ROS and [18F]FSPG uptake in ovarian cancer cell lines; Fig. S2 illustrates the relationship between glutamate and cystine concentrations on [18F]FSPG uptake; Fig. S3 quantifies [U-13C6, U-15N2]cystine labeling of M+8 GSSG; Fig. S4 indicates extensive disulfide exchange between cystine and NAC; Fig. S5 depicts doxorubicin-mediated alterations in tumor cell redox state and [18F]FSPG; and Fig. S6 illustrates changes in [18F]FSPG and [18F]FDG tumor retention after doxil treatment of mice.