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Article

Original Article

Exp Neurobiol 2015; 24(1): 90-94

Published online March 31, 2015

https://doi.org/10.5607/en.2015.24.1.90

© The Korean Society for Brain and Neural Sciences

Asymmetry of Dopamine D2/3 Receptor Availability in Dorsal Putamen and Body Mass Index in Non-obese Healthy Males

Sang Soo Cho1, Eun Jin Yoon1 and Sang Eun Kim1,2,3*

1Department of Nuclear Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam 463-707, 2Department of Transdisciplinary Studies, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 151-742, 3Advanced Institutes of Convergence Technology, Suwon 443-270, Korea

Correspondence to: *To whom correspondence should be addressed.
TEL: 82-31-787-7671, FAX: 82-31-787-4018
e-mail: kse@snu.ac.kr

Received: August 31, 2014; Revised: November 27, 2014; Accepted: December 13, 2014

Abstract

The dopaminergic system is involved in the regulation of food intake, which is crucial for the maintenance of body weight. We examined the relationship between striatal dopamine (DA) D2/3 receptor availability and body mass index (BMI) in 25 non-obese healthy male subjects using [11C]raclopride and positron emission tomography. None of [11C]raclopride binding potential (BP) values (measures of DA D2/3 receptor availability) in striatal subregions (dorsal caudate, dorsal putamen, and ventral striatum) in the left and right hemispheres was significantly correlated with BMI. However, there was a positive correlation between the right-left asymmetry index of [11C]raclopride BP in the dorsal putamen and BMI (r=0.43, p<0.05), suggesting that greater BMI is linked with higher receptor availability in the right dorsal putamen relative to the left in non-obese individuals. The present results, combined with previous findings, may also suggest neurochemical mechanisms underlying the regulation of food intake in non-obese individuals.

Keywords: Dopamine, striatum, body mass index, asymmetry