The Use of Novel PET Tracers to Image Breast Cancer Biologic Processes Such as Proliferation, DNA Damage and Repair, and Angiogenesis

Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
Laura Kenny

Abstract

The balance between proliferation and cell death is pivotal to breast tumor growth. Because of a combination of environmental and genetic factors leading to activation of oncogenes or inactivation of tumor suppressor genes, these processes become deregulated in cancer. PET imaging of proliferation, angiogenesis, and DNA damage and repair offers the opportunity to monitor therapeutic efficacy to detect changes in tumor biology that may precede physical size reduction and simultaneously allows the study of intratumoral and intertumoral heterogeneity.This review examines recent developments in breast cancer imaging using novel probes. The probes discussed here are not licensed for routine use and are at various stages of development ranging from preclinical development (e.g., the DNA repair marker γH2AX) to clinical validation in larger studies (such as the proliferation probe 3'-deoxy-3'-(18)F-fluorothymidine [(18)F-FLT]). In breast cancer, most studies have focused on proliferation imaging mainly based on (18)F-labeled thymidine analogs. Initial studies have been promising; however, the results of larger validation studies are necessary before being incorporated into routine clinical use. Although there are distinct advantages i...Continue Reading

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