CEACAM1 dampens antitumor immunity by down-regulating NKG2D ligand expression on tumor cells.
CEACAM1 dampens antitumor immunity by down-regulating NKG2D ligand expression on tumor cells.
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CEACAM1通过在肿瘤细胞上下调NKG2D配体的表达来抑制抗肿瘤免疫。
DOI:
10.1084/jem.20102575
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发表时间:
2011-12-19
期刊:
影响因子:
--
通讯作者:
Blumberg RS
中科院分区:
文献类型:
--
作者:
Chen Z;Chen L;Baker K;Olszak T;Zeissig S;Huang YH;Kuo TT;Mandelboim O;Beauchemin N;Lanier LL;Blumberg RS
By retaining NKG2D ligands within tumor cells, carcinoembryonic antigen–related cell adhesion molecule 1 (CEACAM1) facilitates tumor cell escape from NK cell–mediated cytolysis in vitro and in vivo. 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.
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