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BMJ Open. 2017 Nov 15;7(11):e018598. doi: 10.1136/bmjopen-2017-018598.

A randomised controlled trial of a duodenal-jejunal bypass sleeve device (EndoBarrier) compared with standard medical therapy for the management of obese subjects with type 2 diabetes mellitus.

Author information

Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, Hampshire, UK.
Imperial College Healthcare NHS Trust, St Mary's Hospital, London, UK.
Department of Public Health, Imperial College London, Imperial Clinical Trials Unit, London, UK.
PsychoNeuroEndocrinology Research Group, Neuropsychopharmacology Unit, Centre for Psychiatry and Computational, Cognitive and Clinical Neuroimaging Laboratory, Division of Brain Sciences, Imperial College London, London, UK.
Division of Diabetes, Endocrinology and Metabolic Medicine, Hammersmith Hospital, London, UK.
Southampton HTA Centre, University of Southampton, University of Southampton Science Park, Southampton, UK.
Computational Cognitive and Clinical Neuroimaging Group, Hammersmith Hospital, Imperial College London, London, UK.
Imperial Clinical Trials Unit, Imperial College London, London, UK.
School of Public Health, Imperial College London, London, UK.
Department of Investigative Medicine, Imperial College London, London, UK.
Diabetes Complications Research Centre, Conway Institute, Dublin, Ireland.
School of Medicine and Medical Sciences, University College Dublin, Dublin, Ireland.
Division of Computational and Systems Medicine, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, London, UK.
Department of Diabetes and Endocrinology, Southampton General Hospital, Southampton, UK.
Primary Care Medical Group, University of Southampton Medical School, Southampton, UK.
North West London Pathology, Head of Division of Diabetes, Endocrinology and Metabolism, Imperial College London, Hammersmith Hospital, London, UK.
Division of Surgery, Imperial College London, London, UK.
Head of Pathology, University College Dublin, Dublin, Ireland.
Division of Surgery, University Hospital Southampton NHS Foundation Trust, Southampton, UK.
Department of Gastroenterology, Imperial College Healthcare NHS Trust, St Mary's Hospital, London, UK.



The prevalence of obesity and obesity-related diseases, including type 2 diabetes mellitus (T2DM), is increasing. Exclusion of the foregut, as occurs in Roux-en-Y gastric bypass, has a key role in the metabolic improvements that occur following bariatric surgery, which are independent of weight loss. Endoscopically placed duodenal-jejunal bypass sleeve devices, such as the EndoBarrier (GI Dynamics, Lexington, Massachusetts, USA), have been designed to create an impermeable barrier between chyme exiting the stomach and the mucosa of the duodenum and proximal jejunum. The non-surgical and reversible nature of these devices represents an attractive therapeutic option for patients with obesity and T2DM by potentially improving glycaemic control and reducing their weight.


In this multicentre, randomised, controlled, non-blinded trial, male and female patients aged 18-65 years with a body mass index 30-50 kg/m2 and inadequately controlled T2DM on oral antihyperglycaemic medications (glycosylated haemoglobin (HbA1c) 58-97 mmol/mol) will be randomised in a 1:1 ratio to receive either the EndoBarrier device (n=80) for 12 months or conventional medical therapy, diet and exercise (n=80). The primary outcome measure will be a reduction in HbA1c by 20% at 12 months. Secondary outcome measures will include percentage weight loss, change in cardiovascular risk factors and medications, quality of life, cost, quality-adjusted life years accrued and adverse events. Three additional subgroups will investigate the mechanisms behind the effect of the EndoBarrier device, looking at changes in gut hormones, metabolites, bile acids, microbiome, food hedonics and preferences, taste, brain reward system responses to food, eating and addictive behaviours, body fat content, insulin sensitivity, and intestinal tissue gene expression.


ISRCTN30845205, Identifier NCT02459561.


duodenal-jejunal bypass liner; duodenal-jejunal bypass sleeve; endobarrier; obesity; type 2 diabetes mellitus

[Indexed for MEDLINE]
Free PMC Article

Conflict of interest statement

Competing interests: Dr Miras reports grants from Fractyl, personal fees from Novo Nordisk, and personal fees from Astra Zeneka outside the submitted work. Dr Goldstone reports funding supported by UK Medical Research Council and Wellcome Trust, outside of the submitted work. Professor Poulter’s institution reports grants from HTA, during the conduct of the study. Dr le Roux reports grants from Science Foundation Ireland, grants from Health Research Board, during the conduct of the study; other from NovoNordisk, other from GI Dynamics, personal fees from Eli Lilly, grants and personal fees from Johnson and Johnson, personal fees from Sanofi Aventis, personal fees from Astra Zeneca, personal fees from Janssen, personal fees from Bristol-Myers Squibb, personal fees from Boehringer-Ingelheim, outside the submitted work.

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