Partial genetic ablation of A2aR significantly delays disease progression in SOD1G93A mice. Longitudinal forelimb grip strength change between A2aR+/+ SOD1G93A+ and A2aR−/−SOD1G93A+ (A, P = 0.77), A2aR+/+ SOD1G93A+ and A2aR+/− SOD1G93A+ (B, P = 0.03). Survival curves of A2aR+/+SOD1G93A+, A2aR+/− SOD1G93A+ mice (C, P = 0.04, Log-rank test) and A2aR+/+ SOD1G93A+, A2aR−/−SOD1G93A+ mice (D, N.S.: not significant); N = 11–15 mice/group.