Expression of lymphocyte activation gene 3 (LAG-3) on B cells is induced by T cells

Lag - 3 , a Novel Lymphocyte Activation Gene

A number of cell surface structures are thought to belong to the Ig superfamily (IgSF) t because they contain at least one domain with a characteristic folding pattern, called the Ig fold (reviewed in reference 1) . Several of these molecules have critical functions in immune responses . In addition to ensuring specific antigen recognition (Ig, TCR), they may function as monomorphic ligands cri...

Lymphocyte Activation Gene 3 (LAG-3) Modulates the Ability of CD4 T-cells to Be Suppressed In Vivo

Lymphocyte Activation Gene - 3 (LAG-3) is an immune checkpoint molecule that regulates both T-cell activation and homeostasis. However, the molecular mechanisms underlying LAG-3's function are generally unknown. Using a model in which LAG-3 blockade or absence reliably augmented homeostatic proliferation in vivo, we found that IL-2 and STAT5 are critical for LAG-3 function. Similarly, LAG-3 blo...

Lymphocyte activation gene-3 (LAG-3) expression and IFN-gamma production are variably coregulated in different human T lymphocyte subpopulations.

We evaluated the relationship between cytokine profile and the expression of the lymphocyte activation gene-3 (LAG-3) in both T cell clones and polyclonal T cell lines; LAG-3 is a CD4-like protein whose expression is reportedly restricted to Th1/0 cells and dependent upon IFN-gamma. We found that, while LAG-3 was expressed only by CD4+ T cell clones producing IFN-gamma, most CD8+ clones produci...

Regulatory T cells inhibit dendritic cells by lymphocyte activation gene-3 engagement of MHC class II.

Lymphocyte activation gene-3 (LAG-3) is a CD4-related transmembrane protein expressed by regulatory T cells that binds MHC II on APCs. It is shown in this study that during Treg:DC interactions, LAG-3 engagement with MHC class II inhibits DC activation. MHC II cross-linking by agonistic Abs induces an ITAM-mediated inhibitory signaling pathway, involving FcgammaRgamma and ERK-mediated recruitme...

Induced by Lymphocyte Activation Gene-3 Maturation and Activation of Dendritic Cells