Striatal dopamine tone is positively associated with body mass index in humans as determined by PET using dual dopamine type-2 receptor antagonist tracers.

ABSTRACT: The relationship between adiposity and dopamine type-2 receptor binding potential (D2BP) in the human brain has been repeatedly studied for >20 years with highly discrepant results, likely due to variable methodologies and differing study populations. We conducted a controlled inpatient feeding study to measure D2BP in the striatum using positron emission tomography with both [¹⁸F]fallypride and [¹¹C]raclopride in pseudo-random order in 54 young adults with a wide range of body mass index (BMI 20-44 kg/m²). Within-subject D2BP measurements using the two tracers were moderately correlated (r=0.47, p<0.001). D2BP was negatively correlated with BMI as measured by [¹¹C]raclopride (r= -0.51; p<0.0001) but not [¹⁸F]fallypride (r=-0.01; p=0.9

SUBMITTER: Darcey VL 

PROVIDER: S-EPMC10602123 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature