Reduced levels of glutathione peroxidaseand Cu,Zn-superoxide dismutase were detected in the erythrocytes of HD patients[34], and elevated levels of cytokines,including interleukins 4, 6, 8, 10, and 23, TNF-Α, as well as clusterin,were found in postmortem brain sections and plasma samples [35]. Here, TNF is linked to Huntington disease.