CDKN2B-AS1 and periodontitis: In the current case-control study, we assessed expression levels of two immune response-related lncRNAs namely the antisense non-coding RNA in the INK4 locus (ANRIL) and metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) in gingival tissues and blood samples of patients with periodontitis and healthy subjects.