What the study found
The study found that quantitative PET/CT (positron emission tomography/computed tomography) measures of tuberculosis lung lesions in infected marmosets aligned with known clinical outcomes. The authors report that these imaging-based response profiles were more informative than bacterial burden alone.
Why the authors say this matters
The authors conclude that PET/CT-based lesion measures may help interpret treatment efficacy and better understand clinical treatment outcomes in pulmonary tuberculosis. They also suggest these measures can provide lesion-level insight into clinical success and failure.
What the researchers tested
The researchers measured radiographic changes in lung lesions in infected marmosets using PET/CT imaging. The animals were divided into 22 treatment arms, including monotherapies and combination drug treatments, and treated for 2 months. They then used unsupervised clustering to combine imaging changes with terminal bacterial burden per lung lesion.
What worked and what didn't
The drug response profiles matched histopathological classifications at necropsy and could distinguish cavitary granulomas that responded to treatment from those that failed to improve or worsened after the first month. The inferiority of the 4-month moxifloxacin-rifampicin-pyrazinamide-ethambutol regimen compared with the 6-month standard of care for lung cavitary tuberculosis could be predicted. The study also found that PET/CT measures were more informative of treatment outcomes than bacterial burden.
What to keep in mind
The study was done in infected marmosets, so the findings are limited to this animal model in the available summary. The abstract does not describe additional limitations.
Key points
- PET/CT-based lung lesion measures aligned with known clinical tuberculosis treatment outcomes.
- The study used infected marmosets split into 22 treatment arms, including mono- and combination therapies.
- Unsupervised clustering combined imaging changes with terminal bacterial burden per lung lesion.
- The response profiles matched histopathology at necropsy.
- The 4-month moxifloxacin-rifampicin-pyrazinamide-ethambutol regimen was predicted to be inferior to 6-month standard treatment for lung cavitary tuberculosis.
Disclosure
- Research title:
- PET/CT lesion responses matched tuberculosis treatment outcomes in marmosets
- Authors:
- Talia Greenstein, Laura E. Via, Mariana Pereira Moraes, Danielle M. Weiner, Emmanuel K. Dayao, April Walker, Ayan Abdi, Joel D. Fleegle, Felipe Alvarez Gómez, Katelyn M. Repoli, Michael J. Woodcock, Helena I. M. Boshoff, Oluwaseun Francis Egbelowo, Kamunkhwala Gausi, Paolo Denti, Firat Kaya, Matthew Zimmerman, Eric L. Miller, Véronique Dartois, Clifton E. Barry, Bree B. Aldridge
- Institutions:
- Center for Discovery, Center for Discovery, Center for Discovery, CNR de la Résistance aux Antibiotiques, Hackensack Meridian Health, Hackensack Meridian Health, Hackensack Meridian Health, Institute of Infectious Disease and Molecular Medicine, National Institutes of Health, National Institutes of Health, National Institutes of Health, National Institutes of Health, National Institutes of Health, Office of Extramural Research, Office of Extramural Research, Office of Extramural Research, Office of Extramural Research, Office of Extramural Research, Office of Extramural Research, Office of Extramural Research, Office of Extramural Research, Office of Extramural Research, Tufts University, Tufts University, Tufts University, Tufts University, University of Cape Town, University of Cape Town, University of Cape Town, University of Cape Town
- Publication date:
- 2026-01-07
- OpenAlex record:
- View
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