University of Hertfordshire

From the same journal

By the same authors


  • George I. Lambrou
  • Myrto Poulou
  • Krinio Giannikou
  • Marios Themistocleous
  • Apostolos Zaravinos
  • Maria Braoudaki
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Original languageEnglish
Article number5491
Number of pages39
Early online date31 Oct 2021
Publication statusPublished - 31 Oct 2021


Epigenetic modifications are considered of utmost significance for tumor ontogenesis and progression. Especially, it has been found that miRNA expression, as well as DNA methylation plays a significant role in central nervous system tumors during childhood. A total of 49 resected brain tumors from children were used for further analysis. DNA methylation was identified with methylation-specific MLPA and, in particular, for the tumor suppressor genes CASP8, RASSF1, MGMT, MSH6, GATA5, ATM1, TP53, and CADM1. miRNAs were identified with microarray screening, as well as selected samples, were tested for their mRNA expression levels. CASP8, RASSF1 were the most frequently methylated genes in all tumor samples. Simultaneous methylation of genes manifested significant results with respect to tumor staging, tumor type, and the differentiation of tumor and control samples. There was no significant dependence observed with the methylation of one gene promoter, rather with the simultaneous presence of all detected methylated genes’ promoters. miRNA expression was found to be correlated to gene methylation. Epigenetic regulation appears to be of major importance in tumor progression and pathophysiology, making it an imperative field of study.


© 2021 by the authors. This is an open access article distributed under the Creative Commons Attribution License.

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