LAG-3/CD223 Fc Chimera Protein, Mouse

LAG3 is a member of the immunoglobulin superfamily and a CD4 ancestral homolog, resulting from a gene duplication event. Like CD4, LAG3 binds MHC class II (MHCII), but also FGL-1,α-synuclein fibrils (α-syn) and the lectins galectin-3 (Gal-3) and lymph node sinusoidal endothelial cell C-type lectin (LSECtin). As an immune checkpoint, LAG3 inhibits the activation of its host cell and generally promotes a more suppressive immune response. On T cells, LAG3 reduces cytokine and granzyme production and proliferation while encouraging differentiation into T regulatory cells.