TNFSF18 (GITRL): A Master Co-Stimulatory Regulator of Immunity and Inflammation
29 Apr 2026
by AntBio
TNFSF18 (GITRL): A Master Co-Stimulatory Regulator of Immunity and Inflammation
Published by ANT BIO PTE. LTD.
Concept
TNFSF18, also recognized as GITRL, is a type II transmembrane glycoprotein belonging to the tumor necrosis factor superfamily. As a pivotal co‑stimulatory immune regulator, it transmits signals by forming homotrimers and binding to its receptor GITR (TNFRSF18/CD357). TNFSF18 shapes immune cell development, inflammatory responses, tumor immunity, and autoimmune pathology, positioning it as a high‑value target for translational immunology.
Research Frontiers
Cutting‑edge studies highlight TNFSF18 as a dynamic signaling hub beyond conventional T‑cell regulation. Structural biology shows that the TNFSF18 trimer engages GITR via key residues in the AA" and DE loops, driving receptor clustering and downstream signaling.
Expression is tightly controlled by NF‑κB, AP‑1, and STAT3, with inflammatory stimuli such as LPS inducing a 20–50‑fold upregulation in myeloid cells. Soluble TNFSF18 (sTNFSF18) is released by metalloproteinase cleavage and acts as a circulating immune modulator. Emerging evidence also supports reverse signaling in antigen‑presenting cells, adding another layer of regulatory complexity.
Research Significance
TNFSF18 governs the balance between immune activation, tolerance, and inflammation. It sustains effector T‑cell activity, tempers Treg suppression, enhances NK‑cell function, and modulates macrophage and dendritic cell antigen presentation.
Dysregulation contributes to cancer immune escape, rheumatoid arthritis, inflammatory bowel disease, lupus, multiple sclerosis, and diabetes. As a tractable therapeutic target, TNFSF18 enables selective immune modulation without global immunosuppression, making it central to next‑generation immunotherapy and precision medicine.
Related Mechanisms and Research Applications
Signaling Mechanisms
TNFSF18 binding triggers GITR trimerization and activates three core signaling cascades:
- NF‑κB pathway: supports cell survival and pro‑inflammatory cytokine secretion
- MAPK pathway (ERK/JNK/p38): drives proliferation and differentiation
- PI3K‑Akt‑mTOR pathway: controls metabolic reprogramming in T cells
In Tregs, TNFSF18 signaling temporarily reduces Foxp3‑mediated suppression, favoring protective immunity. In pathological settings, prolonged signaling promotes chronic inflammation and immune dysfunction.
Research Methods Powered by ANT BIO PTE. LTD. Reagents
High‑quality tools are essential to dissect TNFSF18 function in vitro and in vivo. ANT BIO PTE. LTD. supports global immunology research with:
- Specific antibodies for flow cytometry, Western blot, IHC, and IF
- Recombinant TNFSF18 proteins for receptor activation and binding assays
- Detection kits to quantify soluble and cellular TNFSF18 levels
- General reagents including buffers, secondary antibodies, and assay diluents
Brand Mission
ANT BIO PTE. LTD. is dedicated to advancing breakthrough research in immunology, oncology, and inflammation by delivering reliable, consistent, and high‑performance life science reagents. We equip scientists with the tools needed to uncover novel mechanisms, validate biomarkers, and accelerate therapeutic development.
Featured Related Products
表格
| Product Category | Sub-Brand | Key Applications |
|---|---|---|
| Anti-TNFSF18 antibodies | Starter | FCM, WB, IHC, IF, neutralization assays |
| Recombinant human/mouse TNFSF18 protein | UA | Cell stimulation, ligand-receptor binding, functional assays |
| TNFSF18 ELISA kits | Absin | Quantitative detection in serum, plasma, cell supernatant |
| HRP/fluorescent secondary antibodies | Absin | Immunoassay signal amplification |
| Assay buffers & dilution reagents | Absin | Improved stability and reproducibility |
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