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Methylation of the OTX2 promoter is sufficient to suppress OTX2 in medulloblastoma.

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posted on 08.09.2014, 03:12 by Matthew Wortham, Changcun Guo, Monica Zhang, Lingyun Song, Bum-Kyu Lee, Vishwanath R. Iyer, Terrence S. Furey, Gregory E. Crawford, Hai Yan, Yiping He

(A) Representative methylation patterns of medulloblastoma samples, with samples organized by row and each CpG location organized in columns. Leftmost column indicates OTX2 expression status (red, OTX2-expressing; green, OTX2-nonexpressing), letters to the right of this column indicate OTX2 copy number status (N, normal; G, gained; HL, heterozygous loss), if known [5], [19], [32], [33]. (B) OTX2 mRNA level, as determined by RT-qPCR, in tumors exhibiting either a methylated or unmethylated OTX2 promoter. ND, not detected. (C) Semi-quantitative RT-PCR of OTX2-nonexpressing cells treated with the indicated concentrations of 5′-aza-2′-deoxycytidine for 5 days. D283 medulloblastoma cells serve as a positive control for OTX2 detection.

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