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PET Imaging Study of Recovered Anorexics

This study has been completed.
National Institute of Mental Health (NIMH)
Information provided by (Responsible Party):
Walter Kaye, University of Pittsburgh Identifier:
First received: October 16, 2007
Last updated: August 2, 2016
Last verified: August 2016
Several studies in the past suggest that individuals who have or had anorexia nervosa may have alterations in brain serotonin. Serotonin seems to play an important role in regulating anxiety, mood, and other symptoms found in anorexia nervosa. We will be using a technology called Positron Emission Tomography (PET), which is a method used to take pictures of the body, in this case, the brain. Study participants will undergo two baseline PET scans on the first day of the study. The women who have recovered from anorexia will then be given a medication called fluoxetine (also know as Prozac) to take for 8 weeks. At the end of the 8th week, they will return for a third PET scan. By comparing the brain scans, before and after fluoxetine treatment, we can understand more about how treatment with fluoxetine affects the serotonin receptors in the brain. We will be comparing brain serotonin system in women who have recovered from anorexia before and after medication in order to gain a better understanding of changes in the serotonin system associated with eating disorders. This study may help shed light on how to make fluoxetine a more effective treatment for anorexia nervosa.

Condition Intervention
Anorexia Nervosa
Drug: Fluoxetine

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Basic Science
Official Title: PET Imaging of Dopaminergic Transmission and Serotonin Markers in Anorexia Nervosa

Resource links provided by NLM:

Further study details as provided by University of Pittsburgh:

Primary Outcome Measures:
  • Serotonin Receptor 1A Binding Potential In Regions of Interest (ROI) Accounting for Binding Potential in a Region Without Serotonin 1A Receptors [ Time Frame: Baseline and 8 weeks ] [ Designated as safety issue: No ]
    We used PET and [11C]WAY to assess 5-HT1A binding potential (BP) = [11C]WAY 100635 BP = Distribution Volume (DV)ROI−DVcerebellum in striatal regions; subcortical regions including insula, medial temporal lobe, amygdala, hippocampus, midbrain, parahippocampal gyrus; and the neocortical regions (i.e., anterior cingulate cortex). Analysis of the PET data was performed using the Logan graphical method (Logan et al. 2001) with the cerebellum as a reference region for non-displaceable uptake. 23 REC AN were studied. The Binding Potential (BP) was calculated as followed: BPP = fP Bavail/KD = VT-VND;(Abbrev.: BPP = In vivo binding potential; fP = free fraction in plasma; Bavail = Density of receptors available to bind radioligand in vivo; KD = Dissociation Constant; V = Volumes of Distribution expressed relative to total plasma ligand concentration; T = Total radioligand in tissue; ND = Nondisplaceable tissue uptake; see Innis et al. 2007); Units: mL cm -3

Enrollment: 23
Study Start Date: June 2007
Study Completion Date: December 2008
Primary Completion Date: December 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Annorexia nervosa
Participants recovered from anorexia nervosa before and after administration of fluoxetine
Drug: Fluoxetine
8 weeks of fluoxetine(2.5mg,5mg,10mg,20mg,30mg,40mg,40mg,40mg)each week per day.
Other Name: Prozac


Ages Eligible for Study:   18 Years to 45 Years   (Adult)
Genders Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Recovered from Anorexia Nervosa
  • Not taking medication for emotional problems
  • Regular menstrual cycle

Exclusion Criteria:

  • Women who are pregnant or nursing
  • Psychoactive medications in the past 30 days
  • Neurological disorders.
  Contacts and Locations
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Please refer to this study by its identifier: NCT00603018

United States, Pennsylvania
University of Pittsburgh Medical Center
Pittsburgh, Pennsylvania, United States, 15213
Sponsors and Collaborators
University of Pittsburgh
National Institute of Mental Health (NIMH)
Principal Investigator: Walter Kaye, M.D. UPMC
  More Information

Additional Information:
Responsible Party: Walter Kaye, MD/Director, Eating Disorders Program Professor,, University of Pittsburgh Identifier: NCT00603018     History of Changes
Other Study ID Numbers: PRO06110005 
Study First Received: October 16, 2007
Results First Received: January 25, 2016
Last Updated: August 2, 2016
Health Authority: United States: Institutional Review Board

Keywords provided by University of Pittsburgh:
eating disorders
anorexia nervosa
brain imaging

Additional relevant MeSH terms:
Anorexia Nervosa
Feeding and Eating Disorders
Mental Disorders
Signs and Symptoms, Digestive
Signs and Symptoms
Serotonin Receptor Agonists
Serotonin Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Serotonin Uptake Inhibitors
Neurotransmitter Uptake Inhibitors
Membrane Transport Modulators
Antidepressive Agents, Second-Generation
Antidepressive Agents
Psychotropic Drugs
Cytochrome P-450 CYP2D6 Inhibitors
Cytochrome P-450 Enzyme Inhibitors
Enzyme Inhibitors processed this record on October 25, 2016