1. Brain serotonin synthesis capacity in obsessive-compulsive disorder: effects of cognitive behavioral therapy and sertraline
- Author
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Amir Barsoum, Gilbert Pinard, Debbie Sookman, Thomas E. Nordahl, Paul Gravel, Mirko Diksic, Alexandre Berney, Chawki Benkelfat, Jean Cottraux, Igor Sibon, Jennifer I. Lissemore, and Marco Leyton
- Subjects
Oncology ,Male ,Obsessive-Compulsive Disorder ,6.6 Psychological and behavioural ,medicine.medical_treatment ,0302 clinical medicine ,Sertraline ,Psychology ,medicine.diagnostic_test ,Depression ,Brain ,Middle Aged ,Serious Mental Illness ,Combined Modality Therapy ,Cognitive behavioral therapy ,Psychiatry and Mental health ,Mental Health ,Treatment Outcome ,Positron emission tomography ,6.1 Pharmaceuticals ,Serotonin Uptake Inhibitors ,Public Health and Health Services ,Female ,Selective Serotonin Reuptake Inhibitors ,medicine.drug ,Adult ,medicine.medical_specialty ,Serotonin ,Serotonin synthesis ,Clinical Sciences ,Serotonergic ,behavioral disciplines and activities ,Article ,lcsh:RC321-571 ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,Young Adult ,Neurochemical ,Obsessive compulsive ,Clinical Research ,Internal medicine ,Behavioral and Social Science ,mental disorders ,medicine ,Humans ,lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry ,Biological Psychiatry ,Cognitive Behavioral Therapy ,business.industry ,Neurosciences ,Evaluation of treatments and therapeutic interventions ,030227 psychiatry ,Brain Disorders ,Positron-Emission Tomography ,Raphe nuclei ,business ,030217 neurology & neurosurgery - Abstract
Cognitive behavioral therapy (CBT) and selective serotonin reuptake inhibitors (SSRIs) are both effective treatments for some patients with obsessive-compulsive disorder (OCD), yet little is known about the neurochemical changes related to these treatment modalities. Here, we used positron emission tomography and the α-[11C]methyl-l-tryptophan tracer to examine the changes in brain regional serotonin synthesis capacity in OCD patients following treatment with CBT or SSRI treatment. Sixteen medication-free OCD patients were randomly assigned to 12 weeks of either CBT or sertraline treatment. Pre-to-post treatment changes in the α-[11C]methyl-l-tryptophan brain trapping constant, K* (ml/g/min), were assessed as a function of symptom response, and correlations with symptom improvement were examined. Responders/partial responders to treatment did not show significant changes in relative regional tracer uptake; rather, in responders/partial responders, 12 weeks of treatment led to serotonin synthesis capacity increases that were brain-wide. Irrespective of treatment modality, baseline serotonin synthesis capacity in the raphe nuclei correlated positively with clinical improvement. These observations suggest that, for some patients, successful remediation of OCD symptoms might be associated with greater serotonergic tone.
- Published
- 2018