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An Orthotopic Bladder Tumor Model and the Evaluation of Intravesical saRNA Treatment
Published on: July 28, 2012
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Comprehensive behavioural assessment of TERT in bladder cancer
Meryem El Azzouzi1, Hajar El Ahanidi2, Ilias Hassan3
1Biology and Medical Research Unit, CNESTEN, Rabat, Morocco; Rabat Medical and Pharmacy School, Mohammed V University in Rabat, Rabat, Morocco.
Urologic Oncology
|August 15, 2024
Summary
Telomerase reverse transcriptase (TERT) promoter alterations are key in bladder cancer. Methylation and mutations impact cancer progression, while TERT expression and telomere length influence survival outcomes.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Telomerase activity is vital for cancer development and progression.
- Telomerase reverse transcriptase (TERT) promoter alterations, including mutations and epigenetic changes, are critical in bladder cancer induction and progression.
Purpose of the Study:
- To investigate the role of telomerase reverse transcriptase (TERT) promoter alterations in bladder cancer.
- To analyze the relationship between TERT promoter methylation, TERT promoter mutations, telomere length, and TERT expression in bladder tumors.
- To assess the prognostic significance of these molecular signatures on patient survival.
Main Methods:
- Analysis of 100 bladder tumor tissues.
- Assessment of THOR methylation status.
- Detection of TERT promoter mutations.
- Measurement of telomere length and TERT expression.
Main Results:
- Hypermethylation of the THOR region was observed in 88% of patients, and TERT promoter mutations in 60%.
- TERT promoter methylation occurred across all bladder cancer stages and grades, whereas mutations were found in advanced stages.
- High TERT expression and long telomeres were associated with non-invasive bladder cancer and predicted longer disease-free and overall survival.
Conclusions:
- TERT promoter methylation and mutations are implicated in bladder cancer development.
- These molecular alterations provide prognostic information and enhance understanding of telomere biology in cancer.
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