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Radiolabeled Nucleosides for Predicting and Monitoring the Cancer Therapeutic Efficacy of Chemodrugs

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Uncontrolled cell proliferation is an important hallmark of cancer. Cancer treatment with cytostatic chemodrugs usually results in insignificant changes in tumor size, and thus limits the applications of anatomical imaging modalities for determining the therapeutic efficacy. Positron emission tomography (PET) imaging with cell proliferation probes to assess the clinical outcome during or soon after treatment is becoming acceptable. At present, monitoring DNA synthetic pathways with radiolabeled nucleoside probes that are essential for cell proliferation has been considered a more specific approach to predict tumor response. Among the four nucleosides, thymidine analogues, such as 18F-FLT, have undergone years of development for clinical practice, while cytidine, adenosine and guanosine analogues receive less attention. Recently, several literatures have demonstrated that PET imaging with radiolabeled cytidine and adenosine analogues may have potential to evaluate immune response after chemotherapy, and may enable the prognosis forecast. In this review, we summarize the results of recent preclinical and clinical studies regarding using radiolabeled nucleoside analogues for predicting and monitoring tumor response in cancer treatment. The preparation protocols of these nucleoside scintigraphic probes are also described.

Keywords: Cancer; PET; Uncontrolled cell proliferation; anatomical imaging modalities; cytostatic chemodrugs; nucleoside analogues; proliferation; radiolabeled nucleoside probes; radiosynthesis; treatment response

Document Type: Research Article


Publication date: July 1, 2012

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  • Current Medicinal Chemistry covers all the latest and outstanding developments in medicinal chemistry and rational drug design. Each issue contains a series of timely in-depth reviews written by leaders in the field covering a range of the current topics in medicinal chemistry. Current Medicinal Chemistry is an essential journal for every medicinal chemist who wishes to be kept informed and up-to-date with the latest and most important developments.

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