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Methylation of the oestrogen receptor gene in non-neoplastic epithelium as a marker of colorectal neoplasia risk in
S Fujii1, K Tominaga, K Kitajima
1Department of Surgical and Molecular Pathology, Dokkyo University School of Medicine, 880 Kitakobayashi, Mibu, Shimotsuga, Tochigi 321-0293, Japan. t-fuji@dokkyomed.ac.jp
Gut
|May 5, 2005
Summary
Oestrogen receptor (OR) gene methylation in non-neoplastic tissue may predict neoplasia risk in ulcerative colitis (UC) patients. This marker could improve early detection of colorectal neoplasia in individuals with longstanding UC.
Area of Science:
- Gastroenterology
- Molecular Biology
- Oncology
Background:
- Surveillance colonoscopy is recommended for detecting colorectal neoplasia in ulcerative colitis (UC) patients.
- Early detection of UC-associated neoplasia remains challenging, necessitating sensitive risk markers.
- Oestrogen receptor (OR) gene methylation is implicated in sporadic colorectal neoplasia and may play a role in UC.
Purpose of the Study:
- To determine if OR gene methylation in non-neoplastic colorectal epithelium predicts neoplasia risk in UC patients.
- To assess the utility of OR gene methylation as a biomarker for UC-associated neoplasia.
Main Methods:
- Analysis of 165 non-neoplastic colorectal epithelia from 30 UC patients (13 with neoplasia, 17 without).
- Methylation-specific polymerase chain reaction (PCR) was used to assess OR gene methylation status.
Main Results:
- OR gene methylation was significantly more frequent in non-neoplastic epithelia of UC patients with neoplasia (77.1%) compared to those without (24.2%).
- Extensive OR gene methylation was observed throughout the colorectum in UC patients with neoplasia.
Conclusions:
- OR gene methylation analysis shows potential as a valuable marker for identifying UC patients at increased risk of neoplasia.
- This finding may aid in early detection and management of colorectal neoplasia in longstanding UC.
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