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Cancers 2011, 3(1), 1274-1284; doi:10.3390/cancers3011274

The Prognostic Impact of p53 Expression on Sporadic Colorectal Cancer Is Dependent on p21 Status

1,* , 1
1 Department of Surgery, Campus Benjamin Franklin, Charité-University Medicine Berlin, Hindenburgdamm 30, 12200 Berlin, Germany 2 Institute of Pathology, Campus Mitte, Charité-University Medicine Berlin, Charitéplatz 1, 10117 Berlin, Germany
* Author to whom correspondence should be addressed.
Received: 19 January 2011 / Revised: 28 February 2011 / Accepted: 4 March 2011 / Published: 11 March 2011
(This article belongs to the Special Issue Prognostic and Predictive Factors in Colorectal Cancer)
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The prognostic value of p53 and p21 expression in colorectal cancer is still under debate. We hypothesize that the prognostic impact of p53 expression is dependent on p21 status. The expression of p53 and p21 was immunohistochemically investigated in a prospective cohort of 116 patients with UICC stage II and III sporadic colorectal cancer. The results were correlated with overall and recurrence-free survival. The mean observation period was 51.8 ± 2.5 months. Expression of p53 was observed in 72 tumors (63%). Overall survival was significantly better in patients with p53-positive carcinomas than in those without p53 expression (p = 0.048). No differences were found in recurrence-free survival (p = 0.161). The p53+/p21− combination was seen in 68% (n = 49), the p53+/p21+ combination in 32% (n = 23). Patients with p53+/p21− carcinomas had significantly better overall and recurrence-free survival than those with p53+/p21+ (p < 0.0001 resp. p = 0.003). Our data suggest that the prognostic impact of p53 expression on sporadic colorectal cancer is dependent on p21 status.
Keywords: p53; p21; colorectal cancer; prognosis p53; p21; colorectal cancer; prognosis
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kruschewski, M.; Mueller, K.; Lipka, S.; Budczies, J.; Noske, A.; Buhr, H.J.; Elezkurtaj, S. The Prognostic Impact of p53 Expression on Sporadic Colorectal Cancer Is Dependent on p21 Status. Cancers 2011, 3, 1274-1284.

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