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TNFSF9 / CD137L is a cytokine that belongs to the tumor necrosis factor (TNF) ligand family. This transmembrane cytokine is a bidirectional signal transducer that acts as a ligand for TNFRSF9/4-1BB, which is a costimulatory receptor molecule in T lymphocytes. This cytokine and its receptor are involved in the antigen presentation process and in the generation of cytotoxic T cells. The receptor TNFRSF9/4-1BB is absent from resting T lymphocytes but rapidly expressed upon antigenic stimulation. The ligand encoded by this gene, TNFSF9/4-1BBL, has been shown to reactivate anergic T lymphocytes in addition to promoting T lymphocyte proliferation. This cytokine has also been shown to be required for the optimal CD8 responses in CD8 T cells. This cytokine is expressed in carcinoma cell lines, and is thought to be involved in T cell-tumor cell interaction.
Gene Name: | tumor necrosis factor (ligand) superfamily, member 9 |
Family/Subfamily: | TNF , not assigned-TNF |
Synonyms: | TNFSF9, 4-1BBL, 4-1BB ligand, 4-1BB-L, CD137L, Homolog of mouse 4-1BB-L, Receptor 4-1BB ligand |
Target Sequences: | NM_003811 NP_003802.1 P41273 |
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