Fig. 2

Th17, Treg, and serum 25(OH)D3 differences between PD patients and HCs. (a) FACS analysis of Th17 cells(CD3 + CD8− IL-17+ )in the peripheral blood of PD patients and healthy controls. (b) FACS analysis of Treg cells(CD4 + CD25 + Foxp3+) in the peripheral blood of PD patients and healthy controls. (c) The total Vitamin D concentration in the plasma of PD patients and healthy controls was determined by ELISA. *P < 0.05, **P < 0.01.