Journal: The Journal of Biological Chemistry
Article Title: Notch Pathway Is Activated via Genetic and Epigenetic Alterations and Is a Therapeutic Target in Clear Cell Renal Cancer *
doi: 10.1074/jbc.M116.745208
Figure Lengend Snippet: Integrative analysis reveals that JAG1 and JAG2 are associated with DNA hypomethylation and gene amplification in CCRCC. A, loss of DNA methylation affecting the JAG1 gene locus was seen in CCRCC samples when compared with controls. Differentially hypomethylated intragenic regions in CCRCC samples for the JAG1 locus overlap with kidney specific H3K4me1 enhancer peaks. Methylation values generated by the HELP assay (log(HpaII/MspI) are shown as peaks (positive values corresponding with less methylation are shown in black, and negative values corresponding to increased methylation are shown in gray). Histone modification peaks are shown for adult kidney (BI27). Chromatin occupancy for other tissue types are shown at the bottom. The legend shows color coding for different regions with yellow regions representing enhancers. GM12878, lymphoblastoid cell; H1-hESC, embryonic stem cells; K562, leukemic cells; HepG2, hepatic cells; HUVEC, umbilical vein endothelial cells; HMEC, mammary epithelial cells; HSMM, skeletal muscle myoblasts; NHEK, epidermal keratinocytes; NHLF, lung fibroblasts. B, MassARRAY EpiTYPER analysis shows quantitative hypomethylation in CCRCC samples (n = 6) when compared with healthy controls (n = 6). C, treatment of non-transformed renal tubular cell lines HK2 and HKC8 with decitabine (DAC) results in increased expression of JAG1 by qRT-PCR (means ± S.E. of three independent experiments, P < 0.05, t test). D, MassARRAY EpiTYPER analysis of the JAG1 locus shows decrease in methylation after DAC treatment (means ± S.E. of three independent experiments, t test; P < 0.05 (*)). E, JAG2 lies on chromosome 14 (14q32). MspI representation identified 3 of 13 samples with JAG2 amplification. Representative sample is shown with JAG2 amplification indicated by the arrows.
Article Snippet: Normal human kidney tubular epithelial cell line HK2 and renal cell cancer cell lines 786-O, 769-P, and Caki were purchased from ATCC (with authentication).
Techniques: Amplification, DNA Methylation Assay, Methylation, Generated, HELP Assay, Modification, Transformation Assay, Expressing, Quantitative RT-PCR