WNK2 and periodontitis: Wnt/β-catenin Signaling (Z-score=1.3; one upregulated and four downregulated genes) and Extracellular-regulated Kinase/Mitogen-Activated Protein Kinase (ERK/MAPK) Signaling (Z-score=1; four downregulated genes) were predicted to be upregulated in periodontitis.