Published in:
01-07-2012 | Translational Research and Biomarkers
CXCR4 Expression Predicts Patient Outcome and Recurrence Patterns after Hepatic Resection for Colorectal Liver Metastases
Authors:
Adam C. Yopp, MD, Jinru Shia, MD, Jean M. Butte, MD, Peter J. Allen, MD, Yuman Fong, MD, William R. Jarnagin, MD, Ronald P. DeMatteo, MD, Michael I. D’Angelica, MD
Published in:
Annals of Surgical Oncology
|
Special Issue 3/2012
Login to get access
Abstract
Background
The purpose of this study was to determine if the expression of the chemokine receptors, CXCR4 and CCR7, and the chemokine ligand, CXCL12, in completely resected colorectal cancer hepatic metastases are predictive of disease-specific survival, recurrence-free survival and patterns of recurrence.
Methods
Immunohistochemical analysis of CXCR4, CCR7 and CXCL12 expression within resected hepatic metastases was performed and correlated with clinicopathological variables, disease-specific survival, recurrence-free survival and patterns of recurrence.
Results
Seventy-five patients who underwent partial hepatectomy with curative intent were studied. CXCR4 expression (hazard ratio [HR] 3.6, 95% confidence interval [95% CI] 1.4–9.1) and clinical risk score >2 (HR 2.3, 95% CI 1.1–4.7) were independently associated with disease-specific survival by multivariate analysis. The 5-year estimated disease-specific survival rates for positive and negative CXCR4 tumor expression were 44 and 77%, respectively (P = 0.005). CXCR4 expression (HR 2.2, 95% CI 1.2–4.2) and clinical risk score >2 (HR 1.9, 95% CI 1.1–3.4) were independently associated with recurrence-free survival by multivariate analysis. The five year estimated recurrence-free survival rates for positive and negative CXCR4 tumor expression were 20 and 50%, respectively (P = 0.004). Neither CXCL12 nor CCR7 expression in tumors predicted disease-specific survival or recurrence-free survival. Forty-nine patients (65%) developed recurrent disease after initial hepatectomy. Negative CXCR4 tumor expression was associated with favorable recurrence patterns amenable to salvage resection and/or ablation.
Conclusions
Negative CXCR4 expression in resected colorectal cancer hepatic metastases is independently associated with improved disease-specific and recurrence-free survival and favorable patterns of recurrence.