Glucagon‑like peptide‑1 receptor agonists in multiple sclerosis: therapeutic promise, challenges, and future...

This review evaluates the potential of glucagon‑like peptide‑1 receptor agonists (GLP‑1RAs) - first developed for type 2 diabetes and later approved for chronic weight management and additional indications - to be repurposed as neuroprotective and remyelinating therapies in multiple sclerosis (MS). We synthesize emerging pre‑clinical and early clinical evidence, highlight practical barriers to translation, and outline directions for future research.

In experimental autoimmune encephalomyelitis and toxin-induced demyelination mouse models, GLP-1RAs have been shown to reduce oxidative stress, preserve axonal integrity, suppress microglial and astrocytic activation, and, in some cases, promote remyelination. Early observational data in people with MS suggest GLP-1RAs are well tolerated, provide expected metabolic benefits, and do not exacerbate disease activity. Moreover, signals of reduced neurological impairment and lower dementia incidence in broader diabetic cohorts further support their translational promise. However, to date, there are no published randomized controlled trials of GLP-1RAs in MS.

Pre‑clinical and early clinical signals support GLP‑1RAs as promising candidates for neuroprotection in MS, yet definitive evidence of disease‑modifying efficacy is lacking. Practical barriers, such as drug availability and cost, together with unresolved mechanistic questions underscore the need for biomarker‑rich mechanistic trials. Rigorous prospective studies are essential to establish whether GLP‑1RAs can meaningfully alter the trajectory of MS.