NFKB1 and infection: To uncover which antisense RNA was involved in the NF‐κB mediated down‐regulation of gas6 expression, we analysed the mRNA level changes of gas6, GAS6‐AS1 and GAS6‐AS2 in HUVECs after P. gingivalis‐LPS infection, level changes for the antisense RNAs were similar to the gas6 mRNA level changes.