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Type III Interferon Pathway

Molecular classification
Signaling pathway, Cytokine pathway, JAK-STAT pathway
01

Overview

The type III interferon (IFN) pathway is an antiviral defense mechanism primarily active at epithelial and endothelial barriers. It involves the binding of IFN-lambda ligands (IFNL1, IFNL2, IFNL3, and IFNL4) to a heterodimeric receptor complex (IL28Rα/IFNLR1 and IL10Rβ), leading to activation of the JAK-STAT pathway and subsequent transcription of interferon-stimulated genes (ISGs). Unlike type I IFNs, type III IFNs exhibit more restricted expression, primarily in epithelial cells and some immune cells, resulting in a less inflammatory response.

Other names
IFN-lambda pathwayInterferon lambda signalingType III IFN signaling
02

Mechanism of action

Modulation of interferon-stimulated gene (ISG) expression via the JAK-STAT signaling pathway.

03

Biological functions

Antiviral defenseImmunomodulationSignal transductionGene transcription
04

Disease associations

Viral infectionAutoimmunityCancerInflammation
05

Safety considerations

Potential for autoimmune complications with excessive signalingPotential for off-target effects due to shared receptor components

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