Different TERT Expression between Colorectal Adenoma and Serrated Polyp.

Area of Science:

• Oncology
• Molecular Biology
• Gastroenterology

Background:

• Telomere regulation is linked to colorectal cancer development.
• Previous research indicates telomere dysfunction's role in colorectal carcinogenesis.
• Telomerase reverse transcriptase (TERT) is a key enzyme in telomere maintenance.

Purpose of the Study:

• To investigate the role of TERT in colorectal carcinogenesis.
• To quantify TERT expression in precancerous colorectal lesions.
• To identify associations between TERT expression and specific gene mutations (KRAS, BRAF) and microsatellite instability.

Main Methods:

• Analysis of TERT expression in 93 colorectal precursor lesions (61 tubular adenomas, 32 serrated polyps).
• Detection of KRAS and BRAF gene mutations and microsatellite instability.
• Statistical analysis to determine relationships between TERT expression and clinicopathological variables.

Main Results:

• TERT expression was significantly higher in tubular adenomas compared to paired adjacent non-tumor tissues.
• TERT expression levels were significantly lower in serrated polyps.
• KRAS and BRAF mutations were mutually exclusive; TERT expression showed a non-significant trend towards association with KRAS mutations and low-grade tumors.

Conclusions:

• TERT expression plays a significant role in the progression of tubular adenomas in colorectal tissue.
• The association between TERT expression and KRAS mutation suggests potential therapeutic targets for colorectal cancer prevention.
• Targeting the TERT/KRAS pathway could be a promising strategy for early intervention in colorectal neoplasia.