4-1BB(CD137)is a strong enhancer of the proliferation of CD8^(+)T *** these cells require increased production of energy and biomass to support their proliferation,we hypothesized that 4-1BB signaling activated glucos...
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4-1BB(CD137)is a strong enhancer of the proliferation of CD8^(+)T *** these cells require increased production of energy and biomass to support their proliferation,we hypothesized that 4-1BB signaling activated glucose and fatty acid *** found that treatment with agonistic anti-4-1BB mAb promoted the proliferation of CD8^(+)T cells in vitro,increasing their size and *** with a glycolysis inhibitor and a fatty acid oxidation inhibitor revealed that CD8^(+)T cell proliferation required both glucose and fatty acid ***-4-1BB treatment increased glucose transporter 1 expression and activated the liver kinase B1(LKB1)-AMP-activated protein kinase(AMPK)-acetyl-CoA carboxylase(ACC)signaling pathway,which may be responsible for activating the metabolism of glucose and fatty *** also examined whether blocking glucose or fatty acid metabolism affected cell cycle progression and the anti-apoptotic effect of 4-1BB *** increase of anti-apoptotic factors and cyclins in response to anti-4-1BB treatment was completely prevented by treating CD8^(+)T cells with the fatty acid oxidation inhibitor,etomoxir,but not with the glycolysis inhibitor,*** conclude that anti-4-1BB treatment activates glucose and fatty acid metabolism thus supporting the increased demand for energy and biomass,and that fatty acid metabolism plays a crucial role in enhancing the cell cycle progression of anti-CD3-activated CD8^(+)T cells in vitro and the anti-apoptotic effects of 4-1BB signaling on these cells.
4-1BB is an inducible receptor expressed on activated T cells,while its ligand,4-1BBL,is mainly expressed in antigen-presenting cells and macrophages[1,2].To the best of our knowledge,ligandmediated transactivation of...
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4-1BB is an inducible receptor expressed on activated T cells,while its ligand,4-1BBL,is mainly expressed in antigen-presenting cells and macrophages[1,2].To the best of our knowledge,ligandmediated transactivation of 4-1BB is responsible for the survival and immune effector functions of T cells.
The antitumor capabilities of agonistic anti-4-1BB mAbs have made them an attractive target for tumor ***,the adverse side effects associated with agonist antibodies have hindered their clinical ***,we aimed to study ...
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The antitumor capabilities of agonistic anti-4-1BB mAbs have made them an attractive target for tumor ***,the adverse side effects associated with agonist antibodies have hindered their clinical ***,we aimed to study the immune-related adverse events of repeated doses and long-term use of agonistic anti-4-1BB *** show that chronic activation of 4-1BB signals induced the accumulation of IFN-γ-producing PD-1^(+)CD8^(+)T cells in the secondary lymphoid organs of tumor-bearing mice by increasing the number of dividing CD8^(+)T cells,which was beneficial for suppressing tumor growth in the early phase of anti-4-1BB ***,repeated exposure to anti-4-1BB mAbs led to granuloma development in tumor-draining lymph nodes(TDLNs)of mice due to recruitment and accumulation of macrophages via the CD8^(+)T cell-IFN-γ*** was accompanied by excessive lymph node swelling,which impaired the sequential activation of CD8^(+)T *** data provide insights into the immune-related adverse events of long-term agonist 4-1BB antibody dosing,which should be considered during the clinical development of immunomodulating therapy.
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