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Molecular Imaging and Biology

, Volume 21, Issue 2, pp 279–285 | Cite as

Effects of a Ketogenic Diet on [18F]FDG-PET Imaging in a Mouse Model of Lung Cancer

  • Lorena CussóEmail author
  • Mónica Musteanu
  • Francisca Mulero
  • Mariano Barbacid
  • Manuel Desco
Research Article
  • 613 Downloads

Abstract

Purpose

Myocardial uptake can hamper visualization of lung tumors, atherosclerotic plaques, and inflammatory diseases in 2-deoxy-2-[18F]fluoro-D-glucose ([18F]FDG) studies because it leads to spillover in adjacent structures. Several preparatory pre-imaging protocols (including dietary restrictions and drugs) have been proposed to decrease physiological [18F]FDG uptake by the heart, although their effect on tumor glucose metabolism remains largely unknown. The objective of this study was to assess the effects of a ketogenic diet (as an alternative protocol to fasting) on tumor glucose metabolism assessed by [18F]FDG positron emission tomography (PET) in a mouse model of lung cancer.

Procedures

PET scans were performed 60 min after injection of 18.5 MBq of [18F]FDG. PET data were collected for 45 min, and an x-ray computed tomograph (CT) image was acquired after the PET scan. A PET/CT study was obtained for each mouse after fasting and after the ketogenic diet. Quantitative data were obtained from regions of interest in the left ventricular myocardium and lung tumor.

Results

Three days on a ketogenic diet decreased mean standard uptake value (SUVmean) in the myocardium (SUVmean 0.95 ± 0.36) more than one night of fasting (SUVmean 1.64 ± 0.93). Tumor uptake did not change under either dietary condition.

Conclusions

These results show that 3 days on high-fat diets prior to [18F]FDG-PET imaging does not change tumor glucose metabolism compared with one night of fasting, although high-fat diets suppress myocardial [18F]FDG uptake better than fasting.

Key words

High-fat diet [18F]FDG-PET Ketogenic diet Fasting Lung cancer 

Notes

Acknowledgments

The authors thank Alexandra de Francisco and Yolanda Sierra for their excellent work with animal preparation and imaging protocols.

Funding Information

This work was partially supported by Comunidad de Madrid (S2017/BMD-3867 RENIM-CM) and cofinanciado con Fondos Estructurales de la Unión Europea. The CNIC is supported by the Ministerio de Ciencia, Innovación y Universidades and the Pro CNIC Foundation, and is a Severo Ochoa Center of Excellence (SEV-2015-0505).

Compliance with Ethical Standards

Ethics Statement

All animal procedures were approved by the Animal Experimentation Ethics Committee of Hospital General Universitario Gregorio Marañón (ES280790000087) and the Ethics Committees of CNIO and the Carlos III Health Institute, Madrid, and performed according to European regulations (2010/63/UE) and National regulations (RD 53/2013).

Conflict of Interest

The authors declare that they have no conflicts of interest.

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Copyright information

© World Molecular Imaging Society 2018

Authors and Affiliations

  1. 1.Departamento de Bioingeniería e Ingeniería AeroespacialUniversidad Carlos III de MadridLeganésSpain
  2. 2.Instituto de Investigación Sanitaria Gregorio MarañónMadridSpain
  3. 3.Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM)MadridSpain
  4. 4.Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC)MadridSpain
  5. 5.Centro Nacional de Investigaciones Oncológicas (CNIO)MadridSpain

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