TNF and Parkinson disease: The data shown in Table 2 indicated that serum expression levels of miR‐150 were negatively correlated with IL‐1β (r = −0.509, p < .001), IL‐6 (r = −0.545, p < .001), and TNF‐α (r = −0.652, p < .001), suggesting the potential relationship between miR‐150 and neuroinflammation of PD.