Elsevier

Annals of Oncology

Volume 22, Issue 11, November 2011, Pages 2440-2447
Annals of Oncology

original articles
gastrointestinal tumors
Notch1 and Notch2 have opposite prognostic effects on patients with colorectal cancer

https://doi.org/10.1093/annonc/mdq776Get rights and content
Under an Elsevier user license
open archive

Abstract

Background

Aberrantly activated Notch signaling has been shown to play a key role in carcinogenesis and progression of various human malignancies. In this study, we investigated the expression of Notch1 and Notch2 in colorectal cancer to determine whether they could serve as prognostic predictors.

Patients and methods

The protein expression of Notch1 and Notch2 was examined by immunohistochemistry in 1003 clinical colorectal cancer specimens. Notch1 and Notch2 protein levels were investigated by immunohistochemistry. Statistical analysis was carried out to assess their prognostic value.

Results

Significantly negative correlation between Notch1 and Notch2 was found in colorectal cancer (P < 0.001). Notch1 and Notch2 were proved to be inversely correlated with tumor differentiation, depth of invasion, lymph node metastases, distant metastasis, TNM (tumor–node–metastasis) stage and survival of patients, suggesting opposite function of the two receptors. Notch1 and Notch2 were proved to be adverse independent prognostic predictors (P < 0.001). Moreover, a synergistic effect of positive Notch1 and negative Notch2 coexpression on predicting poor overall survival was proved.

Conclusions

Notch1 and Notch2 may be independent adverse prognostic predictors for patients with colorectal cancer. These results would contribute to identify more efficient prognostic predictors and therapeutic targets.

Keywords

colorectal cancer
Notch1
Notch2
prognosis

Cited by (0)

These authors contributed equally to this work.