Abstract | OBJECTIVE: To investigate the expression of COX-2 and BCL-2 in transitional mucosa adjacent to rectal carcinoma, and to determine whether precursor event exists in the transitional mucosa. METHODS:
Mucin histochemical method ( HID/AB) was used to determine the distal mucosa 2 cm away from rectal carcinoma in 54 patients with rectal cancer. Immunohistochemical method was employed to detect the expression of BCL-2 and COX-2 in the rectal cancer specimen, transitional mucosa (TM), non-transitional mucosa (NTM), and 20 cases of normal rectal mucosa. Student's t-test and Chi-square test were preformed. RESULTS: Nineteen patients with positive TM were found. COX-2 expression was identified in 81.5% of cancer tissue, 21.1% of TM, 17.1% of NTM, and 10.0% in normal mucosa. BCL-2 protein was found in 77.8% of cancer tissue, 21.1% of TM, 22.9% of NTM, and 5.0% of normal mucosa. The expressions of COX-2 and BCL-2 in TM were significantly different from tumor tissue[(0.737±0.895) versus (3.519±1.998), and (0.632±0.955) versus (2.833±1.756), all P<0.01]. However, there were no significant differences between TM and NTM or normal mucosa. CONCLUSIONS: Expressions of COX-2 and BCL-2 are non-specific in the transitional mucosa at the distal rectum. Evidence is not available in TM being precursor lesion.
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Authors | Dong-feng Zhou, Yang Li, Guo-dong Pang, Yi-bo Liang, Lin Cui |
Journal | Zhonghua wei chang wai ke za zhi = Chinese journal of gastrointestinal surgery
(Zhonghua Wei Chang Wai Ke Za Zhi)
Vol. 14
Issue 6
Pg. 448-51
(Jun 2011)
ISSN: 1671-0274 [Print] China |
PMID | 21713707
(Publication Type: English Abstract, Journal Article)
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Chemical References |
- Proto-Oncogene Proteins c-bcl-2
- Cyclooxygenase 2
- PTGS2 protein, human
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Topics |
- Adult
- Aged
- Cyclooxygenase 2
(metabolism)
- Female
- Humans
- Intestinal Mucosa
(metabolism, pathology)
- Male
- Middle Aged
- Proto-Oncogene Proteins c-bcl-2
(metabolism)
- Rectal Neoplasms
(metabolism, pathology)
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