Liraglutide Protected Eye Blood Vessels from Sepsis Damage in Mice

What the researchers found

Liraglutide preserved endothelium-dependent vasodilation (acetylcholine responses) in ophthalmic arteries of septic mice while untreated septic mice showed significantly impaired responses. The protective effect was linked to reduced oxidative stress markers: both dihydroethidium staining and NOX2 antibody staining showed elevated oxidative stress in untreated septic arteries but not in liraglutide-treated ones. Importantly, endothelium-independent vasodilation (sodium nitroprusside) and vasoconstriction (phenylephrine) were unaffected across all groups, confirming the dysfunction was specifically endothelial.

Why it matters

Sepsis can damage blood vessels throughout the body, including in the eyes, potentially contributing to vision-threatening conditions. This study reveals that GLP-1 receptor activation specifically protects endothelial function in ophthalmic arteries — suggesting that widely prescribed GLP-1 drugs could have unexpected protective benefits for eye health during critical illness.

The numbers in context

3 groups of mice; 24h post-CLP assessment; significant impairment in ACh response in septic mice; preserved ACh response with liraglutide; increased DHE and NOX2 staining in septic arteries reversed by liraglutide

How the study worked

Animal study with three groups: sham surgery controls, septic mice (cecal ligation and puncture), and septic mice treated with liraglutide. After 24 hours, ophthalmic arteries were isolated for videomicroscopy vascular function testing and oxidative stress quantification via PCR, dihydroethidium staining, and NOX2 immunohistochemistry.

Who was studied

C57BL/6 mice in three groups: sham surgery, sepsis (CLP), and sepsis + liraglutide treatment

What this study cannot tell us

Mouse model only — no human data. The 24-hour time point captures only acute effects; chronic sepsis outcomes unknown. The cecal ligation model is severe and may not represent all types of sepsis. Specific liraglutide doses and sample sizes per group are not reported in the abstract.

How to read the evidence

Preclinical mouse study with clear mechanistic findings. While the results are compelling, animal models of sepsis don't always translate to human outcomes, and no clinical data exist for this specific application.

When this study was published

Published in 2025, this is a recent addition to the rapidly growing body of evidence on GLP-1 agonists' non-metabolic protective effects.

The bigger picture

GLP-1 receptor agonists continue to reveal benefits beyond glucose control and weight loss. This study adds eye vascular protection during sepsis to a growing list that includes cardiovascular protection, kidney benefits, and anti-inflammatory effects. It also raises questions about whether patients already on GLP-1 drugs may have better ocular outcomes during critical illness.

Questions still open

• Do patients on GLP-1 drugs who develop sepsis have better eye-related outcomes than those not on these medications?
• Could GLP-1 agonists protect against other ocular vascular diseases like diabetic retinopathy through similar mechanisms?
• Does the protective effect persist beyond 24 hours in longer sepsis models?

Common questions

Read the original research

Liraglutide preserves endothelial function in ophthalmic arteries of septic mice via prevention of oxidative stress.

Experimental eye research, 259, 110562

Citation

Böhm, Elsa Wilma; Omran, Wael; Zadeh, Jenia Kouchek; Arad, Tschingis; Pfeiffer, Norbert; Patzak, Andreas; Oelze, Matthias; Daiber, Andreas; Helmstädter, Johanna; Steven, Sebastian; Gericke, Adrian. (2025). Liraglutide preserves endothelial function in ophthalmic arteries of septic mice via prevention of oxidative stress.. Experimental eye research, 259, 110562. https://doi.org/10.1016/j.exer.2025.110562