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Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Scand+J+Immunol 2019 ; 89 (2): e12738 Nephropedia Template TP
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Monoclonal antibody against human Tim-3 enhances antiviral immune response #MMPMID30506563
Li G; Hou C; Dou S; Zhang J; Zhang Y; Liu Y; Wang Z; Xiao H; Wang R; Chen G; Li Y; Feng J; Shen B; Han G
Scand J Immunol 2019[Feb]; 89 (2): e12738 PMID30506563show ga
T cell immunoglobulin and mucin domain protein 3 (Tim-3) is an immune checkpoint inhibitor in T cells and innate immune cells. The deregulated upregulation of Tim-3 is related to immune exhaustion in tumour and viral infection. To overcome Tim-3-mediated immune tolerance, we developed a novel monoclonal antibody against human Tim-3 (L3G) and investigated its roles in inhibiting Tim-3 signalling and overcoming immune tolerance in T cells and monocytes/macrophages. The administration of L3G to cultured peripheral blood mononuclear cells (PBMCs) significantly increased the production of IFN-gamma and IL-2 and the expression of type I interferon. The administration of L3G also increased the production of IFN-gamma, IL-8 and type I interferon in U937 cells and primary monocytes. We investigated the mechanisms by which L3G enhances pro-inflammatory cytokine expression, and our data show that L3G enhances STAT1 phosphorylation in both monocytes/macrophages and T cells. Finally, in an H1N1 infection model of PBMCs and U937 cells, L3G decreased the viral load and enhanced the expression of interferon. Thus, we developed a functional antibody with therapeutic potential against Tim-3-mediated infection tolerance.
|Animals[MESH]
|Antibodies, Monoclonal/*metabolism[MESH]
|Cytokines/metabolism[MESH]
|Disease Models, Animal[MESH]
|Female[MESH]
|Hepatitis A Virus Cellular Receptor 2/*immunology[MESH]
|Humans[MESH]
|Inflammation Mediators/metabolism[MESH]
|Influenza A Virus, H1N1 Subtype/*physiology[MESH]