NIH R01 · 2025
Molecular basis for aberrant de novo DNA methylation in cancer
PROJECT SUMMARY Methylation of cytosine in the context of CpG dinucleotides is an essential and highly conserved chromatin modification. It plays a critical role in gene regulation, cell differentiation and organismal development. Aberrant patterns of DNA methylation are commonly observed in human diseases including cancer. CpG islands (CGIs), regions with a high frequency of CpG sites found at the promoters of ~40% mammalian genes, are devoid of DNA methylation in normal tissues but become hypermethylated in tumors, leading to the silencing of many tumor suppressor genes. However, the molecular mechanisms underlying CGI hypermethylation in cancer remain poorly understood, and therefore…
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