Significance of aberrant DNA methylation for cancer diagnostics and therapy

Česká verzia

Authors: T. Urban ^1,2; P. Pokorná ^1,2; O. Slabý ^1,2,3
Authors place of work: Biologický ústav, LF MU Brno ¹; Středoevropský technologický institut, MU Brno ²; Ústav patologie, LF MU a FN Brno ³
Published in the journal: Klin Onkol 2024; 38(2): 88-94
Category: Reviews
doi: https://doi.org/10.48095/ccko202488

Summary

Background: Epigenetics is a scientific field that covers changes in gene expression that are not caused by the alteration of the nucleotide sequence in the DNA strand. Together with sequential changes, epigenetic reprogramming is a recognized cancer hallmark driving carcinogenesis. The underlying mechanisms of epigenetically-driven gene expression changes are diverse. However, one of the most extensively studied mechanisms is a change in DNA methylation. Under physiological conditions, DNA methylation ensures tissue-specific gene silencing and helps to maintain genome stability. With malignant transformation, genomic DNA undergoes global hypomethylation as well as locus-specific hypermethylation in promoters of tumor suppressor genes. In the last few decades, specific aberrant DNA methylation changes have emerged as both cancer-associated biomarkers and therapeutic targets and prompted ongoing efforts to enhance both diagnostic and therapeutic means in oncology. Purpose: The main purpose of this review is to introduce both established and emerging DNA methylation-based biomarkers for cancer diagnostics with a focus on biomarkers that are either routinely used or have been developed as commercial tests with certification for their use within in vitro diagnostics. Furthermore, therapeutic options for targeting aberrant DNA methylation are described, including both approved compounds and newly developed agents undergoing clinical investigation.

Keywords:

precision medicine – DNA methylation – Epigenetics

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