Semaglutide is a synthetic analogue of glucagon-like peptide 1 (GLP1), which stimulates GLP1 receptors (GLP1R). Stimulation of GLP1R in B-cells in the pancreas potentiates insulin secretion and contribute to blood glucose regulation. In the brain it is known that GLP1R stimulation in the hypothalamus contribute to appetite and body weight regulation. Besides these known GLP1R effects, GLP1R can inhibit production of pro-inflammatory cytokines in microglia, which in turn will stop/slow down degeneration of neurons in the brain. Another GLP1 agonist, exenatide, has been tested in patients with PD, showing significant improvement of motor symptoms. However, it could not be concluded whether this was caused by an symptomatic or neuroprotective effect.
Another clinical trial: GLP1R in Park... - Parkinson's Movement
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outcome, reporting early 2020: clinicaltrials.gov/ct2/show...
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