HSPA8 and Parkinson disease: A particular decreased expression in PD SN of HSPA8 gene (heat-shock 70-kDa protein 8), encoding Hsc-70 (70 kDa heat-shock cognate protein), was also reported in the aforementioned study (Grunblatt et al. 2004; Rabey et al. 2020; Grunblatt et al. 2004).