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Updated: Jan 6, 2026

Multidisciplinary Approach to Obesity Management: A Case Report
Published on: May 30, 2025
LEAP2 as a therapeutic target in obesity and cardiometabolic disorders
Stephanie K Holm1, Valdemar Brimnes Ingemann Johansen1, Christoffer Clemmensen2
1Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
Abstract:
Obesity is a global public health challenge intimately linked to cardiometabolic complications. Although current anti-obesity medications can produce substantial and rapid weight loss, their discontinuation often results in rapid weight regain, underscoring the urgent need for therapies that support long-term weight loss maintenance. The ghrelin receptor system, comprising the hormone ghrelin and its receptor growth hormone secretagogue receptor 1a (GHSR1a), has long been a target for appetite regulation, but decades of drug development have yielded limited clinical success. The recent discovery of liver-expressed antimicrobial peptide 2 (LEAP2), an endogenous GHSR1a antagonist and inverse agonist, has reignited interest in this pathway. LEAP2 suppresses appetite in both rodents and humans, and optimized analogs have shown modest but promising metabolic effects in preclinical models. Although less potent than currently leading agents, LEAP2-based therapies may offer value as adjunct treatments, particularly for sustaining weight loss. This review explores the evolving therapeutic potential of the GHSR1a pathway, with a particular focus on LEAP2 as a novel strategy for treating obesity and associated cardiometabolic disorders.
Insights
New research explores liver-expressed antimicrobial peptide 2 (LEAP2) as a potential therapy for obesity. LEAP2 targets the ghrelin receptor system (GHSR1a) to suppress appetite and may aid long-term weight management.
Area of Science:
- Metabolic disorders
- Endocrinology
- Pharmacology
Background:
- Obesity is a global health issue linked to cardiometabolic diseases.
- Current weight-loss drugs often lead to weight regain after discontinuation.
- The ghrelin receptor system (GHSR1a) is a target for appetite regulation, but drug development has faced challenges.
Purpose of the Study:
- To review the therapeutic potential of the GHSR1a pathway for obesity and cardiometabolic disorders.
- To highlight the role of liver-expressed antimicrobial peptide 2 (LEAP2) as a novel strategy.
- To explore LEAP2's potential for long-term weight loss maintenance.
Main Methods:
- Review of preclinical and clinical studies on the ghrelin receptor system and LEAP2.
- Analysis of LEAP2's mechanism as a GHSR1a antagonist and inverse agonist.
- Evaluation of LEAP2 analogs' metabolic effects in preclinical models.
Main Results:
- LEAP2 suppresses appetite in rodents and humans.
- Optimized LEAP2 analogs demonstrate promising preclinical metabolic effects.
- LEAP2-based therapies may serve as adjunct treatments for sustained weight loss.
Conclusions:
- The GHSR1a pathway, particularly with LEAP2, shows evolving therapeutic potential for obesity.
- LEAP2 offers a novel strategy for managing obesity and associated cardiometabolic conditions.
- LEAP2-based treatments may be valuable for long-term weight management support.
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