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Cell Dev. Biol."],"abstract":"<jats:p><jats:bold>Purpose:<\/jats:bold> Aberrant DNA methylation plays a crucial role in the tumorigenesis of differentiated thyroid cancer (DTC); nevertheless, the factors leading to the local and regional recurrence of DTC are not well understood. This study aimed to establish the connection between DNA methylation-driven genes and the recurrence of DTC.<\/jats:p><jats:p><jats:bold>Methods:<\/jats:bold> RNA sequencing profiles and DNA methylation profiles of DTC were downloaded from The Cancer Genome Atlas (TCGA) database. Combined application of the methylmix R package and univariate Cox regression analyses were used to screen and distinguish prognosis-related methylation-driven genes. Multivariate Cox regression analyses were utilized to identify the target genes that were closely associated with the recurrence of DTC. Then, correlations between the expression levels of the target genes and the clinicopathological features were verified, as well as their potential biological functions.<\/jats:p><jats:p><jats:bold>Results:<\/jats:bold> A total of 168 Methylation-driven genes were differentially expressed in thyroid cancer, among which 10 genes (GSTO2, GSTM5, GSTM1, GPX7, FGF2, LIF, PLAU, BCL10, SHARPIN and TNFRSF1A) were identified as Hub genes. We selected PLAU for further analysis because PLAU was most strongly correlated with DTC recurrence and the DNA methylation levels of PLAU were closely associated with multiple clinicopathological features of DTC. PLAU was significantly upregulated in DTC, and patients with a high expression level of PLAU had a higher risk of recurrence (<jats:italic>p<\/jats:italic> &amp;lt; 0.05). Functional predictions suggested that PLAU-related genes were mainly involved in the regulation of immune-related signaling pathways. Moreover, the mRNA level of PLAU was found to be positively correlated with the cell markers of neutrophils and dendritic cells. In addition, we found that two DNA methylation sites (cg06829584, cg19399285) were associated with abnormal expression of PLAU in DTC.<\/jats:p><jats:p><jats:bold>Conclusion:<\/jats:bold> The methylation-driven gene PLAU is an independent risk factor for the recurrence of DTC and it functions as an oncogene through the regulation of immune-related signaling pathways, which offers new insight into the molecular mechanisms of thyroid cancer and provides new possibilities for individualized treatment of thyroid cancer patients.<\/jats:p>","DOI":"10.3389\/fcell.2022.819484","type":"journal-article","created":{"date-parts":[[2022,1,24]],"date-time":"2022-01-24T05:36:42Z","timestamp":1643002602000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":10,"title":["Methylation-Driven Gene PLAU as a Potential Prognostic Marker for Differential Thyroid Carcinoma"],"prefix":"10.3389","volume":"10","author":[{"given":"Min","family":"Wu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo","family":"Wei","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sai-Li","family":"Duan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mian","family":"Liu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Deng-Jie","family":"Ou-Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peng","family":"Huang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shi","family":"Chang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2022,1,24]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"e0231341","DOI":"10.1371\/journal.pone.0231341","article-title":"BRAF and KRAS Mutations in Papillary Thyroid Carcinoma in the United Arab Emirates","volume":"15","author":"Al-Salam","year":"2020","journal-title":"Plos One"},{"key":"B2","first-page":"305","article-title":"The Urokinase Plasminogen Activating System in Thyroid Cancer: Clinical Implications","volume":"33","author":"Baldini","year":"2012","journal-title":"G Chir"},{"key":"B3","doi-asserted-by":"publisher","first-page":"197","DOI":"10.1016\/j.amjsurg.2009.08.041","article-title":"Preoperative Hematologic Markers as Independent Predictors of Prognosis in Resected Pancreatic Ductal Adenocarcinoma: Neutrophil-Lymphocyte versus Platelet-Lymphocyte Ratio","volume":"200","author":"Bhatti","year":"2010","journal-title":"Am. 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