DNA (cytosine-5-)-methyltransferase 3 alpha, commonly referred to as DNMT3A, is an enzyme that plays a crucial role in the process of DNA methylation, which is an important mechanism for regulating gene expression and maintaining genomic stability.
The expression levels of DNMT3A and the presence of mutations can serve as prognostic markers in certain cancers.
In some cancers, DNMT3A is overexpressed, leading to increased DNA methylation of tumor suppressor genes.
Biological Consequences of DNMT3A Loss
-Epigenetic drift rather than uniform hypomethylation
-Persistence of stem-like transcriptional programs
-Increased self-renewal of hematopoietic stem cells
-Impaired differentiation with preserved viability
Importantly, DNMT3A loss does not strongly increase proliferation on its own—it increases clonal persistence and evolutionary potential.
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