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© 2023 Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. http://creativecommons.org/licenses/by-nc/4.0/ This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See:  http://creativecommons.org/licenses/by-nc/4.0/ . Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Introduction

Clozapine and olanzapine are some of the most effective antipsychotics, but both are associated with weight gain and relevant metabolic disturbances, including pre-diabetes and diabetes. Non-pharmacological/behavioural interventions have had limited effects counteracting these adverse effects. Semaglutide, a glucagon-like peptide 1 receptor agonist, is approved for the treatment of type 2 diabetes and obesity. We will investigate the long-term effects of add-on treatment with semaglutide once a week versus placebo once a week on the metabolic status in pre-diabetic (glycated haemoglobin A1c (HbA1c) 35–47 mmol/mol (5.4%–6.4%) and diabetic (HbA1c 48–57 mmol/mol (6.5%–7.4%)) patients diagnosed with a schizophrenia spectrum disorder who initiated clozapine or olanzapine treatment within the last 60 months.

Methods and analysis

This is a 26-week, double-blinded, randomised, placebo-controlled trial. Altogether, 104 patients diagnosed with a schizophrenia spectrum disorder, aged 18–65 years, with pre-diabetes or diabetes will be randomised to injections of 1.0 mg semaglutide once a week or placebo for 26 weeks. The primary endpoint is change from baseline in HbA1c. Secondary endpoints include changes in body weight, hip and waist circumference and plasma levels of insulin, glucagon, glucose, and C-peptide, insulin sensitivity, beta cell function, hepatic function, fibrosis-4 score, lipid profile, incretin hormones, bone markers, body composition, bone density, proteomic analyses and oxidative stress markers. Together with alcohol, tobacco and drug use, potential effects on the reward value of a sweet–fat stimulus, psychopathology, level of activity and quality of life will also be assessed.

Ethics and dissemination

This study is approved by the Danish Medicines Agency and the regional scientific ethics committee of the Capital Region of Denmark (committee C, #H-20019008) and will be carried out in accordance with International Council for Harmonisation Good Clinical Practice guidelines and the Helsinki Declaration. The results will be disseminated through peer-review publications and conference presentations.

Trial registration number

NCT04892199.

Details

Title
Effect of the GLP-1 receptor agonist semaglutide on metabolic disturbances in clozapine-treated or olanzapine-treated patients with a schizophrenia spectrum disorder: study protocol of a placebo-controlled, randomised clinical trial (SemaPsychiatry)
Author
Sass, Marie Reeberg 1   VIAFID ORCID Logo  ; Danielsen, Andreas Aalkjær 2 ; Köhler-Forsberg, Ole 3 ; Storgaard, Heidi 4 ; Knop, Filip K 5   VIAFID ORCID Logo  ; Mette Ødegaard Nielsen 6 ; Sjödin, Anders Mikael 7 ; Mors, Ole 2 ; Correll, Christoph U 8 ; Ekstrøm, Claus 9 ; Vinberg, Maj 10 ; Nielsen, Jimmi 6 ; Vilsbøll, Tina 5 ; Fink-Jensen, Anders 1 

 Mental Health Centre Copenhagen, Copenhagen University Hospital, Capital Region of Denmark Mental Health Services, Copenhagen, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark 
 Psychiatry, Psychosis Research Unit, Aarhus University Hospital Skejby, Aarhus, Denmark; Department of Clinical Medicine, Aarhus University, Aarhus, Denmark 
 Department of Clinical Medicine, Aarhus University, Aarhus, Denmark; Psychiatry, Psychosis Research Unit, Aarhus Universitetshospital Skejby, Aarhus, Denmark 
 Center for Clinical Metabolic Research, Herlev and Gentofte Hospital, University of Copenhagen, Hellerup, Denmark 
 Center for Clinical Metabolic Research, Herlev and Gentofte Hospital, University of Copenhagen, Hellerup, Denmark; Clinical Research, Steno Diabetes Center Copenhagen, Herlev, Denmark 
 Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; Mental Health Centre Glostrup, Copenhagen University Hospital, Capital Region of Denmark Mental Health Services, Glostrup, Denmark 
 Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark 
 Department of Psychiatry and Molecular Medicine, Hofstra Northwell School of Medicine at Hofstra University, Hempstead, New York, USA; Department of Child and Adolescent Psychiatry, Charité Universitätsmedizin Berlin, Berlin, Germany 
 Department of Biostatistics, University of Copenhagen Department of Public Health, Copenhagen, Denmark 
10  Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; Psychiatric Center North Zeeland, Copenhagen University Hospital, Capital Region of Denmark Mental Health Services, Hillerød, Denmark 
First page
e068652
Section
Mental health
Publication year
2023
Publication date
2023
Publisher
BMJ Publishing Group LTD
e-ISSN
20446055
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2771156493
Copyright
© 2023 Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. http://creativecommons.org/licenses/by-nc/4.0/ This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See:  http://creativecommons.org/licenses/by-nc/4.0/ . Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.