Besides, some metal alloy nanozymes have also been developed for treating PD. For example, PtCu alloy nanozyme has multiple simulated enzyme activities and the ability to scavenge free radicals, which can reduce the level of oxidative stress, thereby achieving the treatment of PD. Notably, by scavenging ROS, this nanozyme can significantly inhibit cell death and neurotoxicity induced by preformed fibrils (PFF), and can also block the diffusion of pathological α-synuclein from the striatum to the substantia nigra, providing a new strategy for the application of nanozymes in treating PD[3].