期刊
ADVANCES IN IMMUNOLOGY, VOL 127
卷 127, 期 -, 页码 33-144出版社
ELSEVIER ACADEMIC PRESS INC
DOI: 10.1016/bs.ai.2015.04.001
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HLA-G is a molecule that was first known to confer protection to the fetus from destruction by the immune system of its mother, thus critically contributing to fetal-maternal tolerance. The first functional finding constituted the basis for HLA-G research and can be summarized as such: HLA-G, membrane-bound or soluble, strongly binds its inhibitory receptors on immune cells (NK, T, B, monocytes/dendritic cells), inhibits the functions of these effectors, and so induces immune inhibition. HLA-G function may therefore be beneficial because when expressed by a fetus or a transplant it protects them from rejection, or deleterious because when expressed by a tumor, it also protects it from antitumor immunity. This is the primary HLA-G function: that of a checkpoint molecule. Great work has been done in the past years to characterize HLA-G itself, its regulation, its functions and mechanisms of action, and its pathological relevance. We will review this here, focusing on transplantation and oncology because these pathological contexts have been studied the most and also because they best represent the two opposite sides of HLA-G: beneficial to be promoted, or deleterious to be blocked.
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