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- W2102289947 abstract "Oncostatin M (OSM) is an interleukin-6 cytokine family member, which inhibits cell proliferation and induces cell differentiation and apoptosis in cancers. In melanoma cells, epigenetic silencing of OSM receptor (OSMR) by histone deacetylation contributes to escape of cell growth control by OSM. However, the silencing of OSMR by DNA methylation in any cancer has not been examined.Methylation status of OSMR was determined by sequencing or methylation-specific PCR in primary tumors and cell lines. Cell lines were treated with DNA methyltransferase inhibitors 5-aza-2-deoxycytidine or DNA methyltransferase 1 small interfering RNA or a histone deacetylase inhibitor trichostatin A. OSMR mRNA level was determined by reverse transcription-PCR. The acetylation of histone H3 was analyzed by chromatin immunoprecipitation assay.We observed methylation of OSMR in 88 of 98 (90%) colorectal cancers, 34 of 38 (89%) colorectal polyps, 17 of 31 (55%) normal-appearing mucosa adjacent to colorectal cancers, 13 of 40 (33%) gastric cancers, and 2 of 10 (20%) pancreatic cancers. OSMR methylation was absent or rarely detected in normal colonic mucosa from noncancer patients or in cancers of nondigestive organs, including breast, lung, liver, prostate, kidney, and melanoma. We observed a significant correlation between OSMR methylation and loss of mRNA expression in 39 cancer cell lines. Following the treatment of colorectal cancer cell lines with 5-aza-2-deoxycytidine, DNA methyltransferase 1 small interfering RNA, or trichostatin A, the induction of OSMR mRNA and the enrichment in the level of histone acetylation were observed.The epigenetic silencing and DNA methylation of OSMR occur frequently in colorectal cancers and rarely in cancers of nondigestive organs. OSMR methylation is an early event in the colorectal carcinogenesis." @default.
- W2102289947 created "2016-06-24" @default.
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- W2102289947 date "2009-02-27" @default.
- W2102289947 modified "2023-10-06" @default.
- W2102289947 title "Unique Methylation Pattern of Oncostatin M Receptor Gene in Cancers of Colorectum and Other Digestive Organs" @default.
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- W2102289947 doi "https://doi.org/10.1158/1078-0432.ccr-08-1778" @default.
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