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RUNX3 and CAMK2N1 hypermethylation as prognostic marker for epithelial ovarian cancer.

Authors: Häfner, Norman  Steinbach, Daniel  Jansen, Lars  Diebolder, Herbert  Dürst, Matthias  Runnebaum, Ingo B 
Citation: Häfner N, etal., Int J Cancer. 2016 Jan 1;138(1):217-28. doi: 10.1002/ijc.29690. Epub 2015 Jul 28.
Pubmed: (View Article at PubMed) PMID:26175272
DOI: Full-text: DOI:10.1002/ijc.29690

Treatment of epithelial ovarian cancer consists of surgery plus platinum-taxane based chemotherapy. Neither prognostic nor predictive serum or tissue markers except BRCA1/2 mutations are available thus precluding individualized treatment. Aim of this study is the identification and validation of DNA-methylation markers with prognostic value. Genome-wide array analyses were used to determine methylation patterns in groups of serous EOC with different outcome (PFS < vs. > 3 years, each n = 6) but comparable clinical parameters. Two hundred and twenty differentially methylated regions in tumor tissue of patients with short vs. long PFS (106 hypo- and 114 hypermethylated regions) were identified. Thirty-five of 37 selected CpG islands were validated by MSP using the same samples as for microarray analyses. Six of these regions were analyzed by targeted next-generation bisulfite-sequencing confirming array and MSP results. Validation experiments with an enlarged patient group of Type II EOC samples (PFS <3 years n = 30; >3 years n = 18) revealed the CpG island of RUNX3 as significantly more often methylated in patients with short PFS (10/30 vs. 0/18; p < 0.01). Marker combinations with significantly different methylation frequencies in patient groups reached an increased sensitivity with equal specificity (RUNX3+CAMK2N1; sens 40%; spec 100%; p < 0.01). RUNX3/CAMK2N1 methylation-positive patients of the array-independent subset (n = 36) showed a significantly lower PFS (p < 0.01) but no other difference in clinical parameters compared to methylation-negative patients. Genome-wide methylation analyses reliably identified markers of potentially prognostic value. Hypermethylation of RUNX3/CAMK2N1 is associated with poor clinical outcome in Type II EOC, also after macroscopic complete resection.

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CRRD Object Information
CRRD ID: 18337279
Created: 2020-01-20
Species: All species
Last Modified: 2020-01-20
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.