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Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers
Published on: September 20, 2018
The epigenome as a molecular marker and target
David Gius1, C Matthew Bradbury, Lunching Sun
1Molecular Radiation Oncology Section, Radiation Oncology Branch, Radiation Oncology Sciences Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892-1002, USA. giusd@mail.nih.gov
Abstract:
Tumor cell proliferation, de-differentiation, and progression depend on a complex combination of altered cell cycle regulation, excessive growth factor pathway activation, and decreased apoptosis. The understanding of these complex mechanisms should lead to the identification of potential molecular markers, targets, and molecular profiles that should eventually expand and improve therapeutic intervention. It now appears clear that methylation plays a central role in transformation, both in vitro and in vivo. However, the exact targets and mechanism(s) are not yet fully understood. This is partly due to the significant number of genes altered by changes in intracellular methyltransferase activity and the chemical agents used to modulate gene expression. The complex nature of methylation's role in regulating gene expression suggests that in addition to investigating individual genes, researchers should develop more comprehensive methods to examine gene expression patterns and their predictive value as this will likely be necessary in the future. If methylation plays a role in transformation, then it seems logical that genes regulating intracellular methylation status may be used as molecular markers to profile tumors by any new methods currently being developed. Perhaps more noteworthy is that DNMT genes may be found to be novel molecular targets for new factor-specific anticancer agents. This idea will be addressed.
Insights
Methylation plays a key role in cancer development and progression. Further research into DNA methyltransferase (DNMT) genes could reveal new molecular markers and targets for anticancer therapies.
Area of Science:
- Oncology
- Molecular Biology
- Epigenetics
Background:
- Tumor progression involves complex mechanisms like altered cell cycle regulation, growth factor pathway activation, and reduced apoptosis.
- Epigenetic modifications, particularly DNA methylation, are increasingly recognized for their role in cellular transformation.
- Understanding these mechanisms is crucial for identifying novel therapeutic targets and improving cancer treatment strategies.
Purpose of the Study:
- To explore the central role of DNA methylation in cancer transformation.
- To investigate the potential of methylation-regulating genes as molecular markers for tumor profiling.
- To assess DNA methyltransferase (DNMT) genes as potential targets for novel anticancer agents.
Main Methods:
- Analysis of gene expression patterns related to methylation.
- Investigation of intracellular methyltransferase activity and its impact on gene expression.
- Examination of DNA methyltransferase (DNMT) genes for potential therapeutic applications.
Main Results:
- Methylation is confirmed to play a significant role in both in vitro and in vivo cancer transformation.
- The precise targets and mechanisms of methylation in cancer require further elucidation.
- Comprehensive methods for examining gene expression patterns are necessary for future research.
Conclusions:
- Genes regulating intracellular methylation status may serve as valuable molecular markers for tumor profiling.
- DNA methyltransferase (DNMT) genes represent promising novel molecular targets for developing targeted anticancer therapies.
- Further research into methylation's role in cancer is essential for advancing therapeutic interventions.
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