Related Experiment Video
Updated: Sep 26, 2026
High-resolution Respirometry to Measure Mitochondrial Function of Intact Beta Cells in the Presence of Natural Compounds
Published on: January 23, 2018
Incretin-Based Therapies: A Testable Hypothesis Linking Incretin Signaling, Mitochondrial Redox, and OXPHOS
Bryn Falahee1, Caroline M Apovian1, Nawfal Istfan1
1Division of Endocrinology, Diabetes, and Metabolism, Mass General Brigham and Harvard Medical School, Boston, Massachusetts, USA.
Objective:
Incretin-based obesity therapies (IBTs), especially GLP-1 receptor agonists (GLP-1 RAs), effectively treat obesity and improve comorbidities. However, their impact on energy metabolism is unclear. A recent case of acute generalized muscle weakness in a patient with mitochondrial myopathy after tirzepatide exposure raises concerns about IBTs' potential to uncouple oxidative phosphorylation (OXPHOS). Given the widespread use of IBTs, this inquiry is crucial due to potential adverse effects.
Methods:
A narrative literature review of evidence linking incretins and IBTs to mitochondrial physiology, bioenergetics, and OXPHOS was conducted.
Results:
Early research on incretin physiology focused on insulin secretion in pancreatic β-cells. However, GLP-1 counteracts insulin signaling during excessive nutrient delivery by activating anti-inflammatory pathways associated with fasting, suggesting it mitigates the adverse effects of overfeeding. Preclinical studies show that IBTs activate thermogenic genes and uncoupling proteins.
Conclusions:
We have identified indirect evidence suggesting that IBTs may induce OXPHOS uncoupling. We propose a testable hypothesis that establishes a close relationship between the distinct effects of IBTs on weight loss and their direct reduction of oxidative stress. Should this hypothesis be validated, it would enhance our comprehension of the physiology underlying IBTs and the potential adverse effects on muscle.
