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Akkus F, Mihov Y, Treyer V, Ametamey SM, Johayem A, Senn S, Rösner S, Buck A, Hasler G. Metabotropic glutamate receptor 5 binding in male patients with alcohol use disorder. Transl Psychiatry 2018; 8:17. [PMID: 29317611 PMCID: PMC5802584 DOI: 10.1038/s41398-017-0066-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 09/13/2017] [Accepted: 10/26/2017] [Indexed: 01/30/2023] Open
Abstract
Glutamate signaling plays a major role in addiction. Preclinical research strongly suggests an implication of G-protein-coupled metabotropic glutamate receptor subtype 5 (mGluR5) in nicotine addiction and alcohol use disorder. In humans, smoking is related to a global reduction in mGluR5 availability. In the present study, we investigated mGluR5 in vivo in patients with alcohol use disorder without the confounding effects of smoking. A total of 14 male subjects with alcohol use disorder and at least a 25-day abstinence and 14 matched male non-smoking healthy controls were included in the study. We employed positron emission tomography (PET) with the mGluR5-specific radiotracer [11C]ABP688, using a bolus/infusion protocol. We found increased mGluR5 DVR in several regions within the temporal lobe in patients, as compared to controls. The largest between-group difference was in the amygdala. There was a marked positive relation between mGluR5 DVR in the anterior cingulate and mGluR5 DVR in the orbitofrontal cortex in patients, but not in controls. In patients, lower temptation to drink was related to higher amygdala mGluR5 DVR. We did not find altered mGluR5 DVR in the basal ganglia of subjects recovering from alcohol use disorder. In conclusion, our study provides clinical evidence for altered mGluR5 signaling in the amygdala in alcohol use disorder. This alteration was associated with the temptation to drink. In addition, this study suggests abnormal mGluR5 signaling in a network underlying reward-related behavioral flexibility. These findings strengthen the case for pharmacological agents acting on mGluR5 as promising candidates for the treatment of alcohol use disorder.
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Affiliation(s)
- Funda Akkus
- Division of Molecular Psychiatry, Translational Research Center, University Hospital of Psychiatry, University of Bern, 3000, Bern 60, Switzerland
| | - Yoan Mihov
- Division of Molecular Psychiatry, Translational Research Center, University Hospital of Psychiatry, University of Bern, 3000, Bern 60, Switzerland
| | - Valerie Treyer
- PET Center, Division of Nuclear Medicine, University Hospital, 8091, Zurich, Switzerland
| | - Simon M Ametamey
- Center for Radiopharmaceutical Science of ETH, PSI, and USZ, Department of Chemistry and Applied Biosciences of ETH, 8093, Zurich, Switzerland
| | - Anass Johayem
- PET Center, Division of Nuclear Medicine, University Hospital, 8091, Zurich, Switzerland
| | - Smeralda Senn
- Forel Clinic, Addiction Treatment Center, 8548, Ellikon an der Thur, Switzerland
| | - Susanne Rösner
- Forel Clinic, Addiction Treatment Center, 8548, Ellikon an der Thur, Switzerland
| | - Alfred Buck
- PET Center, Division of Nuclear Medicine, University Hospital, 8091, Zurich, Switzerland
| | - Gregor Hasler
- Division of Molecular Psychiatry, Translational Research Center, University Hospital of Psychiatry, University of Bern, 3000, Bern 60, Switzerland.
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Three-Dimensional Anatomy of the White Matter Fibers of the Temporal Lobe: Surgical Implications. World Neurosurg 2017; 100:144-158. [DOI: 10.1016/j.wneu.2016.12.120] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Revised: 12/26/2016] [Accepted: 12/27/2016] [Indexed: 11/20/2022]
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