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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Preclinical Evidence That 3'-Deoxy-3'-[18F]Fluorothymidine PET Can Visualize Recovery of Hematopoiesis after Gemcitabine Chemotherapy.
Cancer Research 2016 December 16
Molecular imaging with the PET tracer 3'-deoxy-3'-[18 F]fluorothymidine ([18 F]FLT) allows assessment of the proliferative state of organs in vivo Although used primarily in the oncology clinic, it can also shed light on the proliferation of other tissues, as demonstrated here for monitoring hematopoietic organs that recover after myelosuppressive chemotherapy. In the NMRI nude mouse model, we observed up to a 4.5-fold increase in [18 F]FLT uptake in bone marrow and spleen on days 2, 3, and 5 after treatment with gemcitabine, a chemotherapeutic agent that is powerfully myelosuppressive in the model. Specifically, we observed (i) a reduced spleen weight; (ii) reduced bone marrow cell counts and proliferation (BrdUrd flow cytometry, spleen IHC; 6 hours/day 1); and (iii) reduced leukocytes in peripheral blood (day 5). In conclusion, our results show how [18 F]FLT PET can provide a powerful tool to noninvasively visualize the proliferative status of hematopoietic organs after myelosuppressive therapy. Cancer Res; 76(24); 7089-95. ©2016 AACR.
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