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Molecular Imaging and Biology

, Volume 16, Issue 6, pp 830–837 | Cite as

Response to Deep Brain Stimulation in the Lateral Hypothalamic Area in a Rat Model of Obesity: In Vivo Assessment of Brain Glucose Metabolism

  • María Luisa Soto-MontenegroEmail author
  • Javier Pascau
  • Manuel Desco
Research Article

Abstract

Purpose

To investigate changes in glucose brain metabolism after deep brain stimulation (DBS) in the lateral hypothalamic area (LHA) in a rat model of obesity.

Procedures

Ten obese male Zucker rats were divided into two groups: LHA-control and LHA-DBS. Concentric bipolar platinum-iridium electrodes were implanted bilaterally. After 7 days, DBS was applied for 15 days. Weight and food and water intake were monitored. 2-Deoxy-2-[18F]fluoro-D-glucose ([18F]FDG) PET-CT imaging studies were performed the day after the end of DBS. Differences in glucose uptake between the groups were assessed with statistical parametric mapping.

Results

A difference in weight gain of 3.19 percentage points was found between groups. Average food consumption during the first 15 days was lower in DBS-treated animals than in non-stimulated animals. DBS increased metabolism in the mammillary body, subiculum-hippocampal area, and amygdala, while a decrease in metabolism was recorded in the thalamus, caudate, temporal cortex, and cerebellum.

Conclusions

DBS produced significant changes in brain regions associated with the control of food intake and the brain reward system. DBS seems to normalize the impaired hippocampal functioning that has been described in obese rats. The smaller weight gain in the DBS group suggests that this technique could be considered an option for the treatment of obesity.

Key words

Deep brain stimulation Obesity Positron emission tomography Zucker rat 

Notes

Acknowledgements

We thank Alexandra de Francisco and Yolanda Sierra for their support in stereotactic surgery and animal handling. This research was supported by the following grants: Ministerio de Ciencia e Innovación (PI11/00616, PI10/02986, TEC2010-21619-C04-01) and Comunidad de Madrid (ARTEMIS S2009/DPI-1802). Support was also received from Fundación Mapfre.

Conflicts of Interest

None.

Authorship

MLSM designed the study, analyzed the data, and wrote the manuscript. JP and MD contributed to data analysis and discussion of the manuscript.

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Copyright information

© Academy of Molecular Imaging and Society for Molecular Imaging 2014

Authors and Affiliations

  • María Luisa Soto-Montenegro
    • 1
    • 2
    Email author
  • Javier Pascau
    • 2
    • 3
  • Manuel Desco
    • 1
    • 2
    • 3
  1. 1.Unidad de Medicina y Cirugía ExperimentalInstituto de Investigación Sanitaria Gregorio MarañónMadridSpain
  2. 2.CIBER de Salud Mental (CIBERSAM)MadridSpain
  3. 3.Departamento de Bioingeniería e Ingeniería AeroespacialUniversidad Carlos III de MadridMadridSpain

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