Griebsch, N.I.* ; Kern, J.* ; Hansen, J.* ; Rullmann, M.* ; Luthardt, J.* ; Helfmeyer, S.* ; Dekorsy, F.J.* ; Soeder, M.* ; Hankir, M.K.* ; Zientek, F.* ; Becker, G.A.* ; Patt, M.* ; Meyer, P.M.* ; Dietrich, A.* ; Blüher, M. ; Ding, Y.S.* ; Hilbert, A.* ; Sabri, O.* ; Hesse, S.*
Central serotonin/noradrenaline transporter availability and treatment success in patients with obesity.
Brain Sci. 12:1437 (2022)
Serotonin (5-hydroxytryptamine, 5-HT) as well as noradrenaline (NA) are key modulators of various fundamental brain functions including the control of appetite. While manipulations that alter brain serotoninergic signaling clearly affect body weight, studies implicating 5-HT transporters and NA transporters (5-HTT and NAT, respectively) as a main drug treatment target for human obesity have not been conclusive. The aim of this positron emission tomography (PET) study was to investigate how these central transporters are associated with changes of body weight after 6 months of dietary intervention or Roux-en-Y gastric bypass (RYGB) surgery in order to assess whether 5-HTT as well as NAT availability can predict weight loss and consequently treatment success. The study population consisted of two study cohorts using either the 5-HTT-selective radiotracer [11C]DASB to measure 5-HTT availability or the NAT-selective radiotracer [11C]MRB to assess NAT availability. Each group included non-obesity healthy participants, patients with severe obesity (body mass index, BMI, >35 kg/m2) following a conservative dietary program (diet) and patients undergoing RYGB surgery within a 6-month follow-up. Overall, changes in BMI were not associated with changes of both 5-HTT and NAT availability, while 5-HTT availability in the dorsal raphe nucleus (DRN) prior to intervention was associated with substantial BMI reduction after RYGB surgery and inversely related with modest BMI reduction after diet. Taken together, the data of our study indicate that 5-HTT and NAT are involved in the pathomechanism of obesity and have the potential to serve as predictors of treatment outcomes.
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Publication type
Article: Journal article
Document type
Scientific Article
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Keywords
Pet ; Pet Imaging ; Roux-en-y Gastric Bypass Surgery ; Body Mass Index (bmi ; Kg/m2) ; Noradrenaline ; Noradrenaline Transporter ; Obesity ; Radiotracer ; Serotonin ; Serotonin Transporter
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Language
english
Publication Year
2022
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2022
ISSN (print) / ISBN
2076-3425
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2076-3425
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Volume: 12,
Issue: 11,
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Article Number: 1437
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MDPI
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Peer reviewed
Institute(s)
Helmholtz Institute for Metabolism, Obesity and Vascular Research (HI-MAG)
POF-Topic(s)
30201 - Metabolic Health
Research field(s)
Helmholtz Diabetes Center
PSP Element(s)
G-506501-001
Grants
German Federal Ministry of Education and Research
Copyright
Erfassungsdatum
2022-12-06