https://www.selleckchem.com/B-Raf.html This study aimed to investigate the potential interactions among long noncoding RNA domain containing 1-antisense (lncRNA DCST1-AS1), miR-21, and periodontal ligament-associated protein-1 (PLAP-1) in periodontitis. It has been verified that miR-21 can target PLAP-1 to regulate the osteogenic differentiation of periodontal ligament cells (PDLCs). Differential expression of DCST1-AS1 and miR-21 in PDLCs derived from periodontitis patients and healthy controls was determined by qPCR and unpaired t test. QPCR and Western blots were conducted to evaluate the effects of overexpression of DCST1-AS1 and miR-21 on the expression of PLAP-1. CCK-8 assay was applied to evaluate the effect of DCST1-ASI, miR-21, or PLAP-1 on PDLCs' proliferation. Western blotting was conducted to detect the expression levels of CKD family (CDK4, CDK6, and CCND1). DCST1-AS1 was downregulated in PDLCs derived from periodontitis patients, and its expression was inversely correlated with the expression of miR-2 but positively correlate levels of DCST1-AS1 are much lower in periodontitis patients compared to that in healthy controls, and overexpression of DCST1-AS1 can significantly elevate the expression of PLAP-1 by inhibiting miR-21 in PDLCs. Iron homeostasis plays a crucial role in the combat against pathogen invasion. Ferrous iron can trigger generous production of reactive oxygen species (ROS) by Fenton reaction. Nuclear receptor coactivator 4 (NCOA4), a selectivecargoreceptor to deliver ferritin to lysosome, may trigger release of ferritin-bound iron into the cytosol. The aim of the present study was to explore whether NCOA4-mediated ferritinophagy participated in the pathogenesis of periodontitis, and its role in promoting the periodontal inflammation. Inflamed and healthy periodontal tissues were harvested for immunobiological staining of ferritinophagy-related genes in the periodontal tissues, while real-time quantitative PCR (qPCR) was utilized to dete