Duodenal mucosal resurfacing (DMR) — an investigational endoscopic procedure — helped patients maintain weight loss, and in some cases, even lose additional weight, 3 months after discontinuing GLP-1 receptor agonist therapy, initial results of the open-label, multistage REMAIN-1 trial showed.
In addition, “the procedure was well tolerated, with only minor, transient TEAEs [treatment-emergent adverse events] consistent with routine upper endoscopy,” said Shailendra Singh, MD, of West Virginia University in Morgantown, West Virginia, who presented the findings at The Obesity Society’s Obesity Week 2025 meeting in Atlanta.
DMR uses hydrothermal ablation to treat the duodenal mucosa, which may be dysfunctional in both obesity and impaired glucose tolerance. A previous pooled clinical trial analysis of more than 100 patients with type 2 diabetes demonstrated that DMR helped patients maintain body weight loss up to 48 weeks post-procedure.
Metabolic therapeutics company Fractyl Health, Burlington, Massachusetts, developed the procedure, called Revita, and is sponsoring the current study. The trial’s aim is to determine the effect of DMR on weight-loss maintenance in patients with ≥ 15% total body weight loss using a GLP-1 RA in both an open-label arm and a prospective, randomized, double-blind, sham-controlled multicenter arm.
‘Encouraging Preliminary Findings’
The open-label arm included 15 DMR-treated participants (mean age, 49 years, 87% female ), all of whom had taken tirzepatide for a minimum of 5 months and a maximum of 3 years prior to DMR and had lost at least 15% of their total body weight.
Participants had a mean pre-GLP-1 RA weight of 104.8 kg and a mean weight prior to DMR of 79.4 kg, for a mean total body weight loss from the start of GLP-1 RA of 23.8%. Weight loss was heterogeneous and reflective of the real-world patient population taking GLP-1 medications, according to the poster presentation.
Participants discontinued their GLP-1 medication, underwent the DMR procedure, and were followed for 3 months. A total of 12 of 13 patients maintained or lost weight at that point, with 6 of 13 losing additional weight.
Specifically, participants experienced a median of 0.46% weight change (approximately 1 lb) compared with the 5%-6% weight regain (10-15 lb) observed after GLP-1 discontinuation in the literature.
The procedure was well tolerated, with most patients experiencing no TEAEs and none experiencing an event greater than grade 1. Grade 1 events occurred in three patients; 23% were transient in nature, lasting 2-5 days, and were similar to those typically seen with a routine upper endoscopy.
“These encouraging preliminary findings suggest that DMR may safely achieve durable weight maintenance for patients who wish to discontinue GLP-1 RA therapy,” the study authors stated.
Randomization is anticipated in early 2026, with 6-month topline data and a potential premarket approval filing expected in the second half of 2026.
Marilynn Larkin, MA, is an award-winning medical writer and editor whose work has appeared in numerous publications, including Medscape Medical News and its sister publication MDedge, The Lancet (where she was a contributing editor), and Reuters Health.
