Semi-quantitative procedure for telomeric repeat amplification protocol (TRAP) assay in colorectal carcinomas

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• Telomerase activity is a key marker in cancer research.
• The telomeric repeat amplification protocol (TRAP) assay is standard for detecting telomerase.
• Semi-quantitative TRAP assays offer improved correlation analysis with clinicopathological factors.

Purpose of the Study:

• To investigate the correlation between telomerase activity and clinicopathological factors in colorectal carcinomas.
• To evaluate the utility of a semi-quantitative TRAP assay in this context.

Main Methods:

• Twenty-nine advanced colorectal carcinoma samples were analyzed.
• A commercial telomerase detection kit (TRAP-eze) was employed.
• Polymerase chain reaction (PCR) based TRAP assay coupled with DNA sequencing for semi-quantitative analysis.

Main Results:

• Telomerase activity was detected in all samples, with a mean value of 2.076 units.
• Activity was higher in Dukes' A and C stages compared to B.
• Elevated telomerase activity was noted in right-sided colon tumors and poorly differentiated adenocarcinomas.

Conclusions:

• Semi-quantitative TRAP assay is a valuable tool for analyzing telomerase activity in colorectal carcinomas.
• Telomerase activity shows significant correlations with tumor location, differentiation, and staging in colorectal cancer.