Abstract
Introduction
Cancer heterogeneity and degree of intra-tumoral immune cells represent variables affecting overall survival (OS). The present study investigated the impact of natural killer (NK) and T cells infiltrating colorectal liver metastases (CLM) in patients undergoing hepatectomy after neoadjuvant chemotherapy.
Methods
The frequencies of intra-tumoral, marginal, and peritumoral CD3+ T and NKp46+ NK cells were determined for 121 patients. OS was assessed in relation to prognostic factors.
Results
At univariate analysis, several variables, including T and N of the primary tumor, metachronous CLM, radiological response, and higher density of intra-tumoral CD3+ T cell (>1%/mm2) and of NKp46+ NK cells (>1 cell/mm2), were associated with OS. Only increased frequencies of intra-tumoral CD3+ T cells (p = 0.005) and NKp46+ NK cells (p = 0.004) correlated with OS at multivariate analysis. The logistic regression revealed that metachronous CLM (OR = 2.781; p = 0.002), the use of an epidermal growth factor receptor inhibitor (OR = 3.891; p = 0.001), and radiological response (OR = 3.219; p = 0.001) were associated with higher infiltration of these cells.
Conclusions
High frequencies of NK and T cells in response to chemotherapy predict OS in CLM patients. These findings provide important insights that can help physicians to choose the best treatment option and adopt more predictive follow-up strategies for patients with CLM.
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Contributions
Conception and Design: M. Donadon, D. Mavilio
Development of Methodology: K. Hudspeth, L. Di Tommaso, D. Mavilio
Acquisition of Data: M. Donadon, K. Hudspeth, M. Cimino, L. Di Tommaso, M. Preti, P. Tentorio, M. Roncalli
Analysis and Interpretation of Data: M. Donadon, K. Hudspeth, D. Mavilio
Writing, review, and/or revision of the manuscript: M. Donadon, K. Hudspeth, D. Mavilio
Study Supervision: D. Mavilio. G. Torzilli
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Funding
This work was supported by the Italian Association for Cancer Research (AIRC IG 14687 to D.M.) and by the intramural research program of Humanitas Clinical and Research Center to M.D., M.C., D.M., and G.T. K.H. is the recipient of a fellowship from the “Fondazione Umberto Veronesi.”
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Presented during the plenary section at the 2016 SSAT Meeting in San Diego, CA, USA.
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Donadon, M., Hudspeth, K., Cimino, M. et al. Increased Infiltration of Natural Killer and T Cells in Colorectal Liver Metastases Improves Patient Overall Survival. J Gastrointest Surg 21, 1226–1236 (2017). https://doi.org/10.1007/s11605-017-3446-6
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DOI: https://doi.org/10.1007/s11605-017-3446-6