PTGS2 and head and neck squamous cell carcinoma: A transcriptome analysis of P. gingivalis ‐infected HNSCC cells showed that genes related to migration, including CCL20, CITED2, CTGF, C8orf44‐SGK3, DUSP10, EGR3, FUZ, HBEGF, IL1B, IL24, JUN, PLAU, PTGS2, P2RY1, SEMA7A, SGK1 and SIX2, were highly up‐ or down‐regulated.