LAUSR

We were interested to read the recent article by van Baar and colleagues that described an open-label phase II trial of endoscopic duodenal mucosal resurfacing (DMR) in the management of patients with type 2 diabetes mellitus (T2DM).1 van Baar and colleagues demonstrated improvements in a number of parameters, most impressive of which was the reduction in haemoglobin A1c (HbA1c) at 12 months. It is intriguing to consider what the underlying mechanisms might be for this observed improvement in glycaemic control in patients with T2DM, what confounders might be at play and how these might inform the design of future sham-controlled studies. For example, the investigators comment that the initial weight loss ~2.3 kg observed in …