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Evaluating In Vitro DNA Damage Using Comet Assay
Published on: October 11, 2017
Telomerase and DNA repair in glioma
1Faculty of Science and Technology, University of Central Lancashire, Preston, PR1 2HE, UK.
Abstract:
Both DNA repair (MGMT) and immortalisation (telomerase) have been linked to the root of cancer. In glioma, MGMT expression is negatively regulated through promoter methylation and its absence is associated with enhanced chemosensitivity. However, recent studies indicate that telomerase is positively regulated through methylation and its elimination enhances chemotherapy. These observations suggest that suppression of telomerase in combination with MGMT may have additional anti-proliferative and anti-apoptotic effects, which may lead to increased patient survival rates. However, different approaches may be required to compliment the epigenetic events that regulate these genes. Nevertheless, given that median survival of glioma patients is less than a year, this review focuses on the recent approaches used to target MGMT and telomerase, with a view to increase life expectancy of patients while limiting side effects.
Insights
Targeting DNA repair (MGMT) and immortalization (telomerase) may improve glioma treatment. Combining strategies to suppress both genes could enhance chemotherapy effects and patient survival rates.
Area of Science:
- Oncology
- Molecular Biology
- Epigenetics
Background:
- DNA repair (MGMT) and immortalization (telomerase) are implicated in cancer development.
- MGMT absence in glioma enhances chemosensitivity via promoter methylation.
- Telomerase regulation by methylation suggests its elimination could improve chemotherapy outcomes.
Purpose of the Study:
- To review recent approaches targeting MGMT and telomerase in glioma.
- To explore the potential of combined MGMT and telomerase suppression for improved patient survival.
- To identify strategies that complement epigenetic regulation of these genes.
Main Methods:
- Literature review of recent studies on MGMT and telomerase targeting in glioma.
- Analysis of epigenetic regulation mechanisms (promoter methylation) for MGMT and telomerase.
- Evaluation of combined therapeutic strategies for anti-proliferative and anti-apoptotic effects.
Main Results:
- MGMT and telomerase play critical roles in glioma progression and treatment response.
- Epigenetic modifications differentially regulate MGMT and telomerase.
- Combined targeting strategies show promise for enhanced anti-cancer effects.
Conclusions:
- Suppression of both MGMT and telomerase may offer synergistic anti-cancer benefits in glioma.
- Novel therapeutic approaches are needed to effectively target these pathways and improve survival.
- Further research into complementary epigenetic strategies is warranted for glioma treatment.
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