Journal
MOLECULAR AND CELLULAR ENDOCRINOLOGY
Volume 473, Issue -, Pages 194-204Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.mce.2018.01.020
Keywords
DNA methylation; Epigenetics; Pituitary; Adenoma; NFPA; Gene expression
Categories
Funding
- Polpharma Scientific Foundation [13/XIII/2014]
- [0183/DIA/2016/45]
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Nonfunctioning pituitary adenomas (NFPAs) are among the most frequent intracranial tumors but their molecular background, including changes in epigenetic regulation, remains poorly understood. We performed genome-wide DNA methylation profiling of 34 NFPAs and normal pituitary samples. Methylation status of the selected genomic regions and expression level of corresponding genes were assessed in a group of 75 patients. NFPAs exhibited distinct global methylation profile as compared to normal pituitary. Aberrant DNA methylation appears to contribute to deregulation of the cancer-related pathways as shown by preliminary functional analysis. Promoter hypermethylation and decreased expression level of SFN, STAT5A, DUSP1, PTPRE and FGFR2 was confirmed in the enlarged group of NFPAs. Difference in the methylation profiles between invasive and non-invasive NFPAs is very slight. Nevertheless, invasiveness-related aberrant epigenetic deregulation of the particular genes was found including upregulation of ITPKB and downregulation CNKSR1 in invasive tumors. (C) 2018 Elsevier B.V. All rights reserved.
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