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01.06.2014 | Hepatobiliary Tumors | Ausgabe 6/2014

Annals of Surgical Oncology 6/2014

Patients with CD133-Negative Colorectal Liver Metastasis Have a Poor Prognosis After Hepatectomy

Zeitschrift:
Annals of Surgical Oncology > Ausgabe 6/2014
Autoren:
MD Shinya Yamamoto, MD Kuniya Tanaka, MD Kazuhisa Takeda, MD Hirotoshi Akiyama, MD Yasushi Ichikawa, MD Yoji Nagashima, MD Itaru Endo

Abstract

Background

The prognostic factors for patients with colorectal cancer liver metastasis (L-Mets) have not been fully described.

Methods

Resected specimens were obtained surgically from 1998 to 2008 at our university hospital. We investigated whether the status of two primary lesion cancer stem biomarkers, CD44 and CD133, were maintained in L-Mets and whether these markers were L-Mets prognostic factors. To investigate the CD133 and CD44 status, proliferation, invasiveness, and chemoresistance were examined immunohistochemically by using MIB-1, E-cadherin, and ABC-G2.

Results

The CD44-positive rate in primary lesions and L-Mets was 41.4 and 58.7 %, respectively. There was no correlation of CD44 expression between primary lesions and L-Mets (r = 0.250, p = 0.071). The CD133-positive rate in primary lesions and L-Mets was 53.6 and 44.6 %, respectively. There was no correlation of CD133 expression between primary lesions and L-Mets (r = 0.219, p = 0.135). In the CD133-negative group, the MIB-1 index was significantly higher than in the CD133-positive group (61.6 vs. 46.3 %, p = 0.003), and E-cadherin expression was significantly lower in the CD133-negative group compared with the CD133-positive group (29.3 vs. 46.8 %, p = 0.001). Absence of CD133 expression in L-Mets correlated with poor overall survival (p = 0.006), and multivariate regression analysis showed that it was an independent marker for poor survival (hazard ratio 0.320, p = 0.0016).

Conclusions

The absence of CD133 expression in L-Mets was an independent marker and a poor prognostic factor, possibly because of increased proliferation and invasiveness.

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