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MicroRNA-31 expression in colorectal serrated pathway progression
Hironori Aoki1, Katsuhiko Nosho1, Hisayoshi Igarashi1
1Hironori Aoki, Tokuma Tanuma, Masafumi Nomura, Hiroyuki Maguchi, Center for Gastroenterology, Teine-Keijinkai Hospital, Sapporo 006-0811, Japan.
World Journal of Gastroenterology
|September 19, 2014
Summary
MicroRNA-31 (miR-31) is a potential biomarker for colorectal cancer (CRC). High miR-31 expression in serrated lesions suggests its role in the progression of these precancerous growths.
Area of Science:
- Oncology
- Molecular Biology
- Gastroenterology
Background:
- MicroRNAs are emerging as crucial biomarkers for colorectal cancer (CRC).
- Previous observations linked microRNA-31 (miR-31) expression to BRAF mutation and prognosis in CRC.
- High miR-31 levels are noted in sessile serrated adenomas compared to hyperplastic polyps (HPs).
Observation:
- A case study involved a 75-year-old man with an early invasive carcinoma exhibiting serrated features.
- The lesion, a 7-mm flat-elevated growth in the cecum, was analyzed alongside paired normal mucosa.
- Molecular analysis compared alterations in both the carcinoma and HP components of the lesion.
Findings:
- miR-31 expression was significantly elevated in both the carcinoma (57-fold increase) and HP (8-fold increase) components compared to normal mucosa.
- These findings indicate a substantial role for miR-31 in the serrated pathway of colorectal lesion development.
- miR-31 expression levels correlate with the progression from hyperplastic polyps to serrated adenomas and early invasive carcinoma.
Implications:
- miR-31 may serve as a key molecular indicator in the progression of serrated pathway colorectal lesions.
- Understanding miR-31's role could lead to improved diagnostic and therapeutic strategies for serrated colorectal cancers.
- Further research into miR-31's function is warranted to elucidate its precise mechanisms in CRC pathogenesis.
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