Target intelligence / Profile preview

Interleukin-15 Receptor Alpha Subunit Complexed with Interleukin-15 (IL-15/IL-15Rα)

Target
IL-15/IL-15Rα
Molecular classification
Cytokine-Receptor Complex, Receptor, Cytokine, Type I cytokine receptor family
01

Overview

The IL-15/IL-15Rα complex is a high-affinity cytokine-receptor pair crucial for immune regulation, particularly in NK cells and memory CD8+ T cells. IL-15 binds to IL-15Rα, and this complex typically trans-presents to neighboring cells expressing the IL-2/IL-15Rβ and common γ chains, triggering downstream signaling cascades and promoting lymphocyte survival, proliferation, and activation. Engineered superagonist forms are under investigation as cancer immunotherapeutics. Soluble forms may have application in autoimmune diseases.

Other names
IL15/IL15RA ComplexIL-15 Receptor ComplexCD215/IL-15 Complex
02

Mechanism of action

Trans-presentation of IL-15 to IL-2/15Rβ and γc, activation of JAK/STAT and other kinase signaling pathways (PI3K/Akt/mTOR, MAPK)

03

Biological functions

Immune responseT cell proliferationT cell survivalNK cell developmentNK cell activationSignal transductionLymphocyte homeostasisImmunostimulation
04

Disease associations

CancerAutoimmune diseasesInflammationInfection
05

Safety considerations

Cytokine release syndromeOff-target immune activationPotential for autoimmunity exacerbationInfusion reactions
06

Interacting drugs

IL-15 superagonists

1 more in the full profile.

07

Biomarkers

Expression levels of IL-15Rα on dendritic cellsActivation status of NK and CD8+ T cellsLevels of phosphorylated STAT3/STAT5

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