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Intest Res > Volume 11(4); 2013 > Article
Intestinal Research 2013;11(4):283-291.
DOI:    Published online October 30, 2013.
Effect of Aspirin on Nuclear β-Catenin Expression in Sporadic Colorectal Adenomas
Hee Jung Kim, Sung Joon Lee, Sung Chul Park, Dae Hee Choi, Chang Don Kang, Gu Kang
Departments of Internal Medicine and Pathology, Kangwon National University School of Medicine, Chuncheon, Korea
In addition to the inhibition of cyclooxygenase-2, the chemopreventive effect of non-steroidal anti-inflammatory drugs on the nuclear translocation of β-catenin has been suggested in patients with familial adenoma polyposis. We investigated the effect of aspirin on the β-catenin signaling pathway in patients with sporadic colorectal adenoma. Methods: We selected patients diagnosed with colorectal adenoma. Patients who had been taking aspirin for more than 12 months were identified as the aspirin group, and those who did not were the non-aspirin group. Their characteristics, including size and degree of dysplasia, were compared. Immunohistochemical staining was conducted and the expression levels of nuclear β-catenin and cyclin D1 were investigated. Results: The median duration of aspirin intake was 37 months; there were no significant differences in the size, histological type, and degree of dysplasia between the two groups. Nuclear β-catenin expression was observed in 43.2% of the patients in the aspirin group and in 18.9% of those in the non-aspirin group (P < 0.05). There was no significant difference in nuclear cyclin D1 staining between the aspirin (78.4%) and non-aspirin (91.9%) groups. Conclusions: In this retrospective study, nuclear β-catenin expression in sporadic colorectal adenoma in the aspirin group was not inhibited compared with that in the non-aspirin group. Therefore, further prospective studies with a large number of patients are necessary. (Intest Res 2013;11:283-291)
Key Words: Colorectal adenoma, Aspirin, β-catenin
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