PET evaluation of the relationship between D2 receptor binding and glucose metabolism in patients with parkinsonism

Makoto Nakagawa, Yasuo Kuwabara, Takayuki Taniwaki, Masayuki Sasaki, Hirofumi Koga, Koichiro Kaneko, Kazutaka Hayashi, Jun Ichi Kira, Hiroshi Honda

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Abstract

Objective: To clarify the relationship between D2 receptor binding and the cerebral metabolic rate for glucose (CMRGlu) in patients with parkinsonism, we simultaneously measured both of these factors, and then compared the results. Methods: The subjects consisted of 24 patients: 9 with Parkinson's disease (PD), 3 with Juvenile Parkinson's disease (JPD), 9 with multiple system atrophy (MSA), and 3 with progressive supranuclear palsy (PSP). The striatal D2 receptor binding was measured by the C-11 raclopride transient equilibrium method. CMRGlu was investigated by the F-18 fluorodeoxyglucose autoradiographic method. Results: The D2 receptor binding in both the caudate nucleus and putamen showed a positive correlation with the CMRGlu in the PD-JPD group, but the two parameters demonstrated no correlation in the MSA-PSP group. The left/right (L/R) ratio of D2 receptor binding in the putamen showed a positive correlation with that of CMRGlu in the MSA-PSP group, while the two demonsrated no correlation in the PD-JPD group. Conclusion: Our PET study showed striatal D2 receptor binding and the CMRGlu to be closely related in patients with parkinsonism, even though the results obtained using the L/R ratios tended to differ substantially from those obtained using absolute values. The reason for this difference is not clear, but this finding may reflect the pathophysiology of these disease entities.

Original languageEnglish
Pages (from-to)267-275
Number of pages9
JournalAnnals of Nuclear Medicine
Volume19
Issue number4
DOIs
Publication statusPublished - Jun 2005

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging

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    Nakagawa, M., Kuwabara, Y., Taniwaki, T., Sasaki, M., Koga, H., Kaneko, K., Hayashi, K., Kira, J. I., & Honda, H. (2005). PET evaluation of the relationship between D2 receptor binding and glucose metabolism in patients with parkinsonism. Annals of Nuclear Medicine, 19(4), 267-275. https://doi.org/10.1007/BF02984618