SOD1 and Parkinson disease: A blue-green alga spirulina platensis polysaccharide attenuated the reduction in tyrosine hydroxylase and the dopamine transporter expression (DA-specific markers) via increasing in the activities of superoxide dismutase (SOD), and glutathione peroxidase (GSH-Px) in same mouse PD models (Zhang et al., 2015), SOD and GSH-px are important endogenous antioxidants.