title: Emotional Eating Phenotype is Associated with Central Dopamine D2 Receptor Binding Independent of Body Mass Index.
abstract: PET studies have provided mixed evidence regarding central D2/D3 dopamine receptor binding and its relationship with obesity as measured by body mass index (BMI). Other aspects of obesity may be more tightly coupled to the dopaminergic system. We characterized obesity-associated behaviors and determined if these related to central D2 receptor (D2R) specific binding independent of BMI. Twenty-two obese and 17 normal-weight participants completed eating- and reward-related questionnaires and underwent PET scans using the D2R-selective and nondisplaceable radioligand (N-[(11)C]methyl)benperidol. Questionnaires were grouped by domain (eating related to emotion, eating related to reward, non-eating behavior motivated by reward or sensitivity to punishment). Normalized, summed scores for each domain were compared between obese and normal-weight groups and correlated with striatal and midbrain D2R binding. Compared to normal-weight individuals, the obese group self-reported higher rates of eating related to both emotion and reward (p<0.001), greater sensitivity to punishment (p=0.06), and lower non-food reward behavior (p<0.01). Across normal-weight and obese participants, self-reported emotional eating and non-food reward behavior positively correlated with striatal (p<0.05) and midbrain (p<0.05) D2R binding, respectively. In conclusion, an emotional eating phenotype may reflect altered central D2R function better than other commonly used obesity-related measures such as BMI.
authors.affiliation: 1] Departments of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA [2] Departments of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: Sarah A
authors.initials: SA
authors.lastname: Eisenstein
authors.affiliation: Departments of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: Allison N
authors.initials: AN
authors.lastname: Bischoff
authors.affiliation: Departments of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: Danuta M
authors.initials: DM
authors.lastname: Gredysa
authors.affiliation: Departments of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: Jo Ann V
authors.initials: JA
authors.lastname: Antenor-Dorsey
authors.affiliation: Departments of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: Jonathan M
authors.initials: JM
authors.lastname: Koller
authors.affiliation: Departments of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: Amal
authors.initials: A
authors.lastname: Al-Lozi
authors.affiliation: Departments of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: Marta Y
authors.initials: MY
authors.lastname: Pepino
authors.affiliation: Departments of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: Samuel
authors.initials: S
authors.lastname: Klein
authors.affiliation: 1] Departments of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA [2] Departments of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA [3] Departments of Anatomy &Neurobiology, Washington University School of Medicine, St. Louis, MO 63110, USA [4] Departments of Physical Therapy, Washington University School of Medicine, St. Louis, MO 63110, USA [5] Departments of Occupational Therapy, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: Joel S
authors.initials: JS
authors.lastname: Perlmutter
authors.affiliation: 1] Departments of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA [2] Departments of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Moerlein
authors.affiliation: 1] Departments of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA [2] Departments of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA [3] Departments of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA [4] Departments of Anatomy &Neurobiology, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Black
authors.affiliation: 1] Departments of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110, USA [2] Departments of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA [3] Departments of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: Tamara
authors.initials: T
authors.lastname: Hershey
mesh_terms: D000328:Adult; D001544:Benperidol / Q000008:administration & dosage / Q000493:pharmacokinetics; D015992:Body Mass Index; D001921:Brain / Q000000981:diagnostic imaging / Q000378:metabolism; D004644:Emotions; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D008297:Male; D009765:Obesity / Q000000981:diagnostic imaging / Q000378:metabolism; D049268:Positron-Emission Tomography; D011859:Radiography; D017448:Receptors, Dopamine D2 / Q000378:metabolism*; D011795:Surveys and Questionnaires
chemical_list: C581293:DRD2 protein, human; D017448:Receptors, Dopamine D2; D001544:Benperidol