CEACAM1 dampens antitumor immunity by down-regulating NKG2D ligand expression on tumor cells

Zhangguo Chen, Lanfen Chen, Kristi Baker, Torsten Olszak, Sebastian Zeissig, Yu Hwa Huang, Timothy T. Kuo, Ofer Mandelboim, Nicole Beauchemin, Lewis L. Lanier, Richard S. Blumberg*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

Although carcinoembryonic antigen (CEA)-related cell adhesion molecule 1 (CEACAM1) has been viewed as a tumor suppressor, increasing clinical evidence shows that high levels of CEACAM1 expression on tumors correlates with poor prognosis and high risk of metastasis. Here, we examined the consequences of CEACAM1 expression on tumor cells. We show that tumor cell-associated CEACAM1 causes intracellular retention of various NKG2D ligands in mouse and human tumor cells. CEACAM1-silenced tumor cells expressed more cell surface NKG2D ligands and exhibited greater sensitivity to natural killer cell-mediated cytolysis in vitro and rejection in vivo. Our studies reveal a novel mechanism through which CEACAM1-bearing tumor cells may escape immune-surveillance.

Original languageAmerican English
Pages (from-to)2633-2640
Number of pages8
JournalJournal of Experimental Medicine
Volume208
Issue number13
DOIs
StatePublished - 19 Dec 2011

Fingerprint

Dive into the research topics of 'CEACAM1 dampens antitumor immunity by down-regulating NKG2D ligand expression on tumor cells'. Together they form a unique fingerprint.

Cite this