{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T02:58:16Z","timestamp":1790132296483,"version":"4.0.1"},"reference-count":38,"publisher":"Bioscientifica","issue":"6","content-domain":{"domain":["erc.bioscientifica.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2012,12]]},"abstract":"<jats:p>\n                    DNA methylation is one of the several epigenetic modifications that together with genetic aberrations are hallmarks of tumorigenesis including those emanating from the pituitary gland. In this study, we examined DNA methylation across 27\u200a578 CpG sites spanning more than 14\u200a000 genes in the major pituitary adenoma subtypes. Genome-wide changes were first determined in a discovery cohort comprising non-functioning (NF), growth hormone (GH), prolactin (PRL)-secreting and corticotroph (CT) adenoma relative to post-mortem pituitaries. Using stringent cut-off criteria, we validated increased methylation by pyrosequencing in 12 of 16 (75%) genes. Overall, these criteria identified 40 genes in NF, 21 in GH, six in PRL and two in CT that were differentially methylated relative to controls. In a larger independent cohort of adenomas, for genes in which hypermethylation had been validated, different frequencies of hypermethylation were apparent, where the\n                    <jats:italic>KIAA1822<\/jats:italic>\n                    (\n                    <jats:italic>HHIPL1<\/jats:italic>\n                    ) and\n                    <jats:italic>TFAP2E<\/jats:italic>\n                    genes were hypermethylated in 12 of 13 NF adenomas whereas the\n                    <jats:italic>COL1A2<\/jats:italic>\n                    gene showed an increase in two of 13 adenomas. For genes showing differential methylation across and between adenoma subtypes, pyrosequencing confirmed these findings. In three of 12 genes investigated, an inverse relationship between methylation and transcript expression was observed where increased methylation of\n                    <jats:italic>EML2<\/jats:italic>\n                    ,\n                    <jats:italic>RHOD<\/jats:italic>\n                    and\n                    <jats:italic>HOXB1<\/jats:italic>\n                    is associated with significantly reduced transcript expression. This study provides the first genome-wide survey of adenoma, subtype-specific epigenomic changes and will prove useful for identification of biomarkers that perhaps predict or characterise growth patterns. The functional characterisation of identified genes will also provide insight of tumour aetiology and identification of new therapeutic targets.\n                  <\/jats:p>","DOI":"10.1530\/erc-12-0251","type":"journal-article","created":{"date-parts":[[2012,10,9]],"date-time":"2012-10-09T00:20:57Z","timestamp":1349742057000},"page":"805-816","update-policy":"https:\/\/doi.org\/10.1530\/crossmarkpolicy-1","source":"Crossref","is-referenced-by-count":72,"title":["Quantitative, genome-wide analysis of the DNA methylome in sporadic pituitary adenomas"],"prefix":"10.1530","volume":"19","author":[{"given":"Cuong V","family":"Duong","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Richard 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