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Pre-neoplastic epigenetic disruption of transcriptional enhancers in chronic inflammation.


ABSTRACT: Chronic periodontitis (CP) is a chronic inflammatory disease independently associated with higher incidence of oral cavity squamous cell carcinoma (OSCC). However, the molecular mechanism responsible for this increased incidence is unknown. Here we profiled the DNA methylome of CP patients and healthy controls and compared to a large set of OSCC samples from TCGA. We observed a significant overlap between the altered DNA methylation patterns in CP and in OSCC, suggesting an emergence of a pre-neoplastic epigenome in CP. Remarkably, the hypermethylated CpGs in CP were significantly enriched for enhancer elements. This aberrant enhancer methylation is functional and able to disrupt enhancer activity by preventing the binding of chromatin looping factors. This study provides new insights on the molecular mechanisms linking chronic inflammation and tumor predisposition, highlighting the role of epigenetic disruption of transcriptional enhancers.

SUBMITTER: Planello AC 

PROVIDER: S-EPMC4941276 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature

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Pre-neoplastic epigenetic disruption of transcriptional enhancers in chronic inflammation.

Planello Aline C AC   Singhania Rajat R   Kron Ken J KJ   Bailey Swneke D SD   Roulois David D   Lupien Mathieu M   Line Sérgio R Peres SR   de Souza Ana Paula AP   De Carvalho Daniel D DD  

Oncotarget 20160301 13


Chronic periodontitis (CP) is a chronic inflammatory disease independently associated with higher incidence of oral cavity squamous cell carcinoma (OSCC). However, the molecular mechanism responsible for this increased incidence is unknown. Here we profiled the DNA methylome of CP patients and healthy controls and compared to a large set of OSCC samples from TCGA. We observed a significant overlap between the altered DNA methylation patterns in CP and in OSCC, suggesting an emergence of a pre-ne  ...[more]

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