Killer cell lectin-like receptor G1 binds three members of the classical cadherin family to inhibit NK cell cytotoxicity.

Killer cell lectin-like receptor G1 binds three members of the classical cadherin family to inhibit NK cell cytotoxicity.
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杀伤细胞凝集素样受体G1结合经典钙粘蛋白家族的三个成员,以抑制NK细胞细胞毒性。

DOI:
10.1084/jem.20051986
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发表时间:
2006-02-20
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Matsumoto N
Matsumoto N
中科院分区:
其他
文献类型:
--
作者:
Ito M;Maruyama T;Saito N;Koganei S;Yamamoto K;Matsumoto N

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杀伤细胞凝集素样受体G1(KLRG 1)是一种在自然杀伤(NK)细胞和T细胞亚群上表达的抑制性受体,其内源性配体未知。在这里,我们表明,KLRG 1结合三个经典的钙粘蛋白(E-,N-和R-),这是普遍表达的脊椎动物和介导细胞间粘附的同型或异型相互作用。通过使用小鼠KLRG 1四聚体作为探针的表达克隆,我们鉴定了人E-钙粘蛋白作为异种配体。我们还确定了小鼠KLRG 1和小鼠E-cadherin之间的同源相互作用。此外,我们表明,KLRG 1结合N-和R-钙粘蛋白。最后,我们证明了KLRG 1的E-钙粘蛋白结合阻止了KLRG 1 + NK细胞对表达E-钙粘蛋白的靶细胞的裂解。这些结果表明,KLRG 1连接E-,N-,或R-钙粘蛋白可以调节杀伤细胞的细胞毒性,以防止损伤组织表达的钙粘蛋白。
Killer cell lectin-like receptor G1 (KLRG1) is an inhibitory receptor expressed on subsets of natural killer (NK) cells and T cells, for which no endogenous ligands are known. Here, we show that KLRG1 binds three of the classical cadherins (E-, N-, and R-), which are ubiquitously expressed in vertebrates and mediate cell–cell adhesion by homotypic or heterotypic interactions. By expression cloning using the mouse KLRG1 tetramer as a probe, we identified human E-cadherin as a xenogeneic ligand. We also identified a syngeneic interaction between mouse KLRG1 and mouse E-cadherin. Furthermore, we show that KLRG1 binds N- and R-cadherins. Finally, we demonstrate that E-cadherin binding of KLRG1 prevents the lysis of E-cadherin–expressing targets by KLRG1+ NK cells. These results suggest that KLRG1 ligation by E-, N-, or R-cadherins may regulate the cytotoxicity of killer cells to prevent damage to tissues expressing the cadherins.
DOI: 10.1038/372190a0
发表时间: 1994-11-10
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