Prognostic significance of p27/kip1 and apoptosis in patients with colorectal carcinoma.

Abstract:

:The protein p27/kip1 is a cyclin-dependent kinase inhibitor that regulates cell-cycle progression. In the present study, p27/kip1 expression as well as tumor cell proliferation and apoptosis were investigated in 80 colorectal carcinomas, using anti-p27/kip1 antibodies, in situ apoptosis detection kits and anti-PCNA antibodies. Immunohistochemical staining indicated that p27/kip1 was localized heterogeneously in the nuclei of cancer cells. The frequency of samples positive for p27/kip1 was 53.8% (43/80). There was no significant correlation between p27/kip1 status and clinicopathologic factors. Mean apoptotic index (AI) in p27/kip1-positive patients (3.22+/-1.65) was significantly higher than in p27/kip1-negative patients (2.46+/-1.44; p=0.033). No correlation was observed between p27/kip1 expression and the PCNA labeling index (PCNA-LI) (p=0.47). Overall survival was significantly longer for patients who were p27/kip1-positive (80.7%) compared to those who were negative (49.3%; p=0.0003). Univariate analysis revealed no significant differences between prognosis and AI or PCNA-LI. In multivariate analysis, p27/kip1 expression was found to be an independent prognostic marker (p=0.015). In conclusion, the present study shows that p27/kip1 is a potentially important prognostic and predictive marker for outcome in colorectal carcinoma. These results might be explained by the role of p27/kip1 in promoting apoptosis.

journal_name

Oncol Rep

journal_title

Oncology reports

authors

Noguchi T,Kikuchi R,Ono K,Takeno S,Moriyama H,Uchida Y

keywords:

subject

Has Abstract

pub_date

2003-07-01 00:00:00

pages

827-31

issue

4

eissn

1021-335X

issn

1791-2431

journal_volume

10

pub_type

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