For the cytokines, levels of cytokines IL17A (0.577 ± 0.352 vs. 0.395 ± 0.204, P = 0.045) and IL10 (0.202 ± 0.195 vs. 0.083 ± 0.052, P = 0.002) were significantly higher in patients with PD than that of healthy controls, and the increase of IL10 level survived the correction for multiple comparisons. The gene discussed is IL17A; the disease is Parkinson disease.