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. 2017 Nov 9;7:15173. doi: 10.1038/s41598-017-15634-9

Figure 4.

Figure 4

EpiTYPER of HPV+ and HPV− tumor samples validates hypermethylation of positively correlated CpG islands in HPV− tumors. MALDI-TOF mass spectrometry was used to study DNA methylation in HPV− (n = 12) and HPV+ (n = 11) tumor samples. (A) Representative Epigram from individual HPV− and HPV+ tumors indicating position of CpG’s within PCR transcript. HPV− tumors had (B) a trend for hypermethylation of the DRE, (C) no change at the canonical CpG island, and (D) significant hypermethylation of the exon 2 CpG island. Data presented as mean ± SEM. *p < 0.05.