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Recent Progress in the Molecular Imaging of Tumor-Treating Bacteria

Nuclear Medicine and Molecular Imaging 2021년 55권 1호 p.7 ~ 14
강새령, 민정준,
소속 상세정보
강새령 ( Kang Sae-Ryung ) - Chonnam National University Hospital Department of Nuclear Medicine
민정준 ( Min Jung-Joon ) - Chonnam National University Hospital Department of Nuclear Medicine

Abstract


Bacterial cancer therapy (BCT) approaches have been extensively investigated because bacteria can show unique features of strong tropism for cancer, proliferation inside tumors, and antitumor immunity, while bacteria are also possible agents for drug delivery. Despite the rapidly increasing number of preclinical studies using BCT to overcome the limitations of conventional cancer treatments, very few BCT studies have advanced to clinical trials. In patients undergoing BCT, the precise localization and quantification of bacterial density in different body locations is important; however, most clinical trials have used subjective clinical signs and invasive sampling to confirm bacterial colonization. There is therefore a need to improve the visualization of bacterial densities using noninvasive and repetitive in vivo imaging techniques that can facilitate the clinical translation of BCT. In vivo optical imaging techniques using bioluminescence and fluorescence, which are extensively employed to image the therapeutic process of BCT in small animal research, are hard to apply to the human body because of their low penetrative power. Thus, new imaging techniques need to be developed for clinical trials. In this review, we provide an overview of the various in vivo bacteria-specific imaging techniques available for visualizing tumor-treating bacteria in BCT studies.

키워드

Tumor-treating bacteria; Bacterial cancer therapy; In vivo imaging; Bacteria-specific imaging

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