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Interleukin-15 Receptor (Agonism via Membrane-Bound IL-15 Expression) (IL-15R)
- Target
- IL-15R
- Molecular classification
- Receptor, Cytokine receptor complex, Heterodimeric receptor, Type I cytokine receptor
01
Overview
Interleukin-15 (IL-15) receptor agonism via membrane-bound IL-15 expression (IL-15R) refers to the therapeutic strategy of activating the IL-15 receptor complex through mimicking the natural trans-presentation mechanism. This involves the co-expression of IL-15 and IL-15Ralpha on antigen-presenting cells, forming a membrane-bound complex that stimulates neighboring lymphocytes expressing IL-2Rbeta and the common gamma chain (gamma c). This interaction promotes NK cell and CD8+ T cell proliferation, survival, and cytotoxicity, making it a promising approach for cancer immunotherapy. The signaling cascade involves the activation of the JAK/STAT pathway, leading to downstream gene expression changes.
- Other names
- Membrane-bound IL-15IL-15/IL-15Ralpha complex (membrane-bound)Interleukin-15 Receptor Agonist (membrane-bound)Trans-presented IL-15
02
Mechanism of action
Agonism of IL-15 receptor complex via membrane-bound IL-15/IL-15Ralpha, leading to JAK/STAT pathway activation and downstream immune cell stimulation.
03
Biological functions
Immune responseT cell activationNK cell activationCell proliferationCell survivalSignal transductionCytotoxicity enhancement
04
Disease associations
CancerAutoimmune diseases (potential)Infection (viral, bacterial)
05
Safety considerations
Cytokine release syndrome (CRS)Off-target immune activationPotential for autoimmunityLimited spatial control (compared to strictly localized presentation)JAK/STAT pathway activation related toxicities
06
Biomarkers
STAT3 phosphorylationSTAT5 phosphorylationExpression levels of IL-15Ralpha, IL-2Rbeta, and gamma chainNK cell countsCD8+ T cell countsExpression of NK cell activation markers (e.g., CD69)
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