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Updated: Oct 27, 2025

Continuous Fluorescence-Based Endonuclease-Coupled DNA Methylation Assay to Screen for DNA Methyltransferase Inhibitors
Published on: August 5, 2022
Methyltransferases in the Pathogenesis of Keratinocyte Cancers
Eun Kyung Ko1, Brian C Capell1,2,3,4
1Department of Dermatology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA.
Abstract:
Recent evidence suggests that the disruption of gene expression by alterations in DNA, RNA, and histone methylation may be critical contributors to the pathogenesis of keratinocyte cancers (KCs), made up of basal cell carcinoma (BCC) and cutaneous squamous cell carcinoma (cSCC), which collectively outnumber all other human cancers combined. While it is clear that methylation modifiers are frequently dysregulated in KCs, the underlying molecular and mechanistic changes are only beginning to be understood. Intriguingly, it has recently emerged that there is extensive cross-talk amongst these distinct methylation processes. Here, we summarize and synthesize the latest findings in this space and highlight how these discoveries may uncover novel therapeutic approaches for these ubiquitous cancers.
Insights
Alterations in DNA, RNA, and histone methylation are key to keratinocyte cancers (KCs). Understanding cross-talk between these methylation processes may reveal new therapeutic strategies for these common cancers.
Area of Science:
- Oncology
- Epigenetics
- Molecular Biology
Background:
- Keratinocyte cancers (KCs), including basal cell carcinoma (BCC) and cutaneous squamous cell carcinoma (cSCC), are the most common human cancers.
- Dysregulation of methylation processes (DNA, RNA, histone) is implicated in KC pathogenesis.
- The intricate cross-talk between these distinct methylation pathways in KCs is an emerging area of research.
Purpose of the Study:
- To synthesize current findings on the role of DNA, RNA, and histone methylation alterations in KC development.
- To explore the molecular mechanisms underlying methylation dysregulation in KCs.
- To highlight potential therapeutic strategies emerging from the understanding of methylation cross-talk in KCs.
Main Methods:
- Literature review and synthesis of recent evidence.
- Analysis of molecular and mechanistic changes in KC pathogenesis related to methylation.
- Exploration of cross-talk between different methylation processes.
Main Results:
- Gene expression disruption via altered DNA, RNA, and histone methylation is critical in KC pathogenesis.
- Methylation modifiers are frequently dysregulated in KCs, but underlying mechanisms are still being elucidated.
- Significant cross-talk exists among DNA, RNA, and histone methylation processes in KCs.
Conclusions:
- Understanding the interplay of methylation processes offers novel therapeutic avenues for KCs.
- Targeting methylation pathways presents a promising strategy for treating BCC and cSCC.
- Further research into methylation cross-talk is crucial for advancing KC therapies.
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