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- Title
Distributable, metabolic PET reporting of tuberculosis.
- Authors
Khan, R. M. Naseer; Ahn, Yong-Mo; Marriner, Gwendolyn A.; Via, Laura E.; D'Hooge, Francois; Seo Lee, Seung; Yang, Nan; Basuli, Falguni; White, Alexander G.; Tomko, Jaime A.; Frye, L. James; Scanga, Charles A.; Weiner, Danielle M.; Sutphen, Michelle L.; Schimel, Daniel M.; Dayao, Emmanuel; Piazza, Michaela K.; Gomez, Felipe; Dieckmann, William; Herscovitch, Peter
- Abstract
Tuberculosis remains a large global disease burden for which treatment regimens are protracted and monitoring of disease activity difficult. Existing detection methods rely almost exclusively on bacterial culture from sputum which limits sampling to organisms on the pulmonary surface. Advances in monitoring tuberculous lesions have utilized the common glucoside [18F]FDG, yet lack specificity to the causative pathogen Mycobacterium tuberculosis (Mtb) and so do not directly correlate with pathogen viability. Here we show that a close mimic that is also positron-emitting of the non-mammalian Mtb disaccharide trehalose – 2-[18F]fluoro-2-deoxytrehalose ([18F]FDT) – is a mechanism-based reporter of Mycobacteria-selective enzyme activity in vivo. Use of [18F]FDT in the imaging of Mtb in diverse models of disease, including non-human primates, successfully co-opts Mtb-mediated processing of trehalose to allow the specific imaging of TB-associated lesions and to monitor the effects of treatment. A pyrogen-free, direct enzyme-catalyzed process for its radiochemical synthesis allows the ready production of [18F]FDT from the most globally-abundant organic 18F-containing molecule, [18F]FDG. The full, pre-clinical validation of both production method and [18F]FDT now creates a new, bacterium-selective candidate for clinical evaluation. We anticipate that this distributable technology to generate clinical-grade [18F]FDT directly from the widely-available clinical reagent [18F]FDG, without need for either custom-made radioisotope generation or specialist chemical methods and/or facilities, could now usher in global, democratized access to a TB-specific PET tracer. Current methods for detection of tuberculosis rely mostly on bacterial culture from sputum. Here, the authors provide preclinical evidence that a positron-emitting mimic of the disaccharide trehalose ([18F]FDT) can be used as a radiotracer for the imaging of tuberculosis-associated lesions and monitoring the effects of treatment.
- Subjects
TREHALOSE; TUBERCULOSIS; MYCOBACTERIUM tuberculosis; GLOBAL burden of disease; BACTERIAL cultures; DISACCHARIDES
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-48691-6