In another study comparing the neuroprotective effects of two other novel GLP-1/GIP dual receptor agonists (DA-JC4, DA-CH5) with the GLP-1 single receptor agonist liraglutide and the first-generation GLP-1/GIP dual receptor agonist DA-JC1 in MPTP-induced PD mice, the results concluded that the new dual receptor agonists have clear neuroprotective effects (112). Here, GCG is linked to Parkinson disease.