TNF and Parkinson disease: For common up or down regulated DEGs among all three groups, we identified classes of “vesicle-mediated transport”, “mitochondria”, “splicing”, and “Alzheimer’s, Huntington’s, Parkinson’s diseases” etc. to be up-regulated, while “protein ubiquitination”, “small GTPase mediated signal transduction”, “regulation of cytoskeleton” and “TNFα signaling” etc. to be down-regulated.