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. 2018 Feb 8;9:577. doi: 10.1038/s41467-018-03025-1

Fig. 5.

Fig. 5

A specific methylation signature at keratin gene clusters identifies two distinct subclasses of AK/cSCC. a UCSC genome browser tracks showing significant DNA methylation differences (Δβ, P < 0.05, F-test, vertical green lines) at the keratin gene cluster on chromosome 12 for AK (upper part) and cSCC (lower part) in comparison to healthy epidermis. b Specific DNA methylation patterns of the genes encoding keratins K5, K14, K15, and K80 (KRT5, KRT14, KRT15, and KRT80, respectively). Heatmaps show DNA methylation levels (in β values, from blue (= 0) to red (= 1)) of probes (columns) located in the promoter and gene body, for individual healthy, AK, and cSCC samples (rows). Filled and empty circles denote the two distinct subclasses of AK (purple) and cSCC (black), respectively. c Principal component analysis of healthy, AK, and cSCC epidermis samples based on 1364 keratin-associated methylation probes. For comparisons, keratin methylation patterns from 26 additional tumor entities were also included. d Hierarchical clustering of the dataset shown in c. The 26 tumor entities depicted in this graph, and also used in c, are from left to right: testicular germ cell tumors, liver hepatocellular carcinoma, esophageal carcinoma, head and neck squamous cell carcinoma, lung squamous carcinoma, cervical squamous cell carcinoma and endocervical adenocarcinoma, uterine corpus endometrial carcinoma, uterine carcinosarcoma, lung adenocarcinoma, stomach adenocarcinoma, ovarian serous cystadenocarcinoma, bladder urothelial carcinoma, colon adenocarcinoma, rectum adenocarcinoma, skin cutaneous melanoma, adrenocortical carcinoma, glioblastoma multiforme, sarcoma, thyroid carcinoma, kidney renal papillary cell carcinoma, cholangiocarcinoma, prostate adenocarcinoma, breast invasive carcinoma, pancreatic adenocarcinoma, kidney renal clear cell carcinoma, and mesothelioma