Target intelligence / Profile preview

Interleukin 15 (IL-15)

Target
IL-15
Molecular classification
Four alpha helix bundle cytokines, Cytokine
01

Overview

Interleukin-15 (IL-15) is a pleiotropic cytokine belonging to the 4-alpha helix bundle family that plays a central role in both innate and adaptive immunity. It modulates the development, survival, proliferation, and activation of various immune cell types, including Natural Killer (NK) cells, CD8+ memory T cells, NKT cells, γδ T cells and ILC1 cells. Dysregulated IL-15 production has been implicated in autoimmune diseases and cancer. Recombinant forms and agonists are under development for cancer immunotherapy.

02

Mechanism of action

IL-15 interacts with a heterotrimeric receptor complex consisting of IL-15Rα, IL-2/IL-15Rβ, and the common γ chain (*γc*), activating downstream signaling pathways like JAK1/JAK3 → STAT3/STAT5, p38 MAPK, and NF-kB to promote lymphocyte proliferation, survival, and activation.

03

Biological functions

Lymphocyte proliferationLymphocyte survivalAnti-apoptosisInnate immunityAdaptive immunityNK cell homeostasisCD8+ memory T-cell survival
04

Disease associations

Autoimmune diseasesCancerInflammation
05

Safety considerations

Potential for excessive immune activationRisk of cytokine release syndromeLimited single-agent activity may require combination therapiesDysregulated or excessive production implicated in autoimmune diseases
06

Interacting drugs

Recombinant human IL-15

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