{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,20]],"date-time":"2025-11-20T13:16:53Z","timestamp":1763644613665,"version":"3.40.3"},"reference-count":23,"publisher":"Public Library of Science (PLoS)","issue":"4","license":[{"start":{"date-parts":[[2025,4,2]],"date-time":"2025-04-02T00:00:00Z","timestamp":1743552000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Taizhou Science and Technology planning Project","award":["NO. 20ywb67"],"award-info":[{"award-number":["NO. 20ywb67"]}]}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"abstract":"<jats:sec id=\"sec026\">\n<jats:title>Background<\/jats:title>\n<jats:p>Diabetes Mellitus type 2 (DM2) is thought to have a bidirectional relationship with Periodontitis (PD). However, the complex molecular interactions between DM2 and PD remain unclear. This study aimed to explore the shared genes and common signatures of DM2 and PD via bioinformatic analysis.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec027\">\n<jats:title>Methods<\/jats:title>\n<jats:p>Firstly, using bioinformatic methods to investigate common genes. The series matrix files of <jats:italic>GSE6751<\/jats:italic> for DM and <jats:italic>GSE15932<\/jats:italic> for PD were downloaded from the Gene Expression Omnibus (GEO) database. The data was normalized using the R package, and the limma package was utilized to identify the Differentially Expressed Genes (DEGs). Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analyses of DEGs were performed using the \u201cclusterProfiler\u201d package in the R software. The protein-protein network was constructed to analyze the potential relationship among the proteins. CytoHubba, a plugin for the Cytoscape software, was used to identify the hub genes. The validation datasets selected for DM2 and PD were <jats:italic>GSE10334<\/jats:italic> and <jats:italic>GSE7014<\/jats:italic>, respectively. Receiver Operating Characteristic (ROC) curve analysis was performed to obtain the area under the ROC curve. Lipopolysaccharide (LPS) +\u2009 high glucose-induced DM-related PD was simulated to verify the three hub genes through quantitative Real-Time Polymerase Chain Reaction (qRT-PCR) and Western blot (WB).<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec028\">\n<jats:title>Results<\/jats:title>\n<jats:p>In total, 44 common DEGs were identified. ITGAM, H2BC21, S100A9 was identified as he hub genes of DM2 and PD, with all of them were up-regulated. In addition, the area under the curve of all three hub genes was more than 0.65. In-vitro experiments revealed that the relative expression of <jats:italic>S100A9<\/jats:italic> was increased after the treatment with LPS +\u2009 high glucose. Besides, TLR4 and p-NF-\u03baB levels were also improved in model group.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec029\">\n<jats:title>Conclusion<\/jats:title>\n<jats:p><jats:italic>S100A9<\/jats:italic> was identified as the hub gene of DM2 and PD. S100A9 could trigger TLR4 signaling way to promote disease development, which can be the potential targets for diagnosis and treatment.<\/jats:p>\n<\/jats:sec>","DOI":"10.1371\/journal.pone.0320061","type":"journal-article","created":{"date-parts":[[2025,4,2]],"date-time":"2025-04-02T23:36:22Z","timestamp":1743636982000},"page":"e0320061","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":1,"title":["Potential diagnostic markers and therapeutic targets for DM2 and periodontitis based on bioinformatics 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