PDK4 and keloid: GSE90051 described hub gene expression in keloid vs. adjacent non-lesion skin tissues and its evaluation confirmed the changes in the expression of the lipo-related hub genes ABHD5, ADIPOQ, CIDEC, DGAT2, FABP4, LEP, LPL, PDK4, PLIN1, PPARG, and PPARGC1A, as well as lncRNAs HOTAIR and PART1 in these tissues (Figure 3A).