Target intelligence / Profile preview

Phosphatidylinositol 3-kinase delta catalytic subunit (PI3Kδ)

Target
PI3Kδ
Molecular classification
Lipid Kinase, Enzyme, PI3K, Class I PI3K
01

Overview

PI3Kδ/p110δ is a leukocyte-enriched lipid kinase crucial for adaptive immunity. Its dysregulation leads to immunodeficiencies or contributes to cancer pathogenesis. Selective pharmacological targeting exploits structural features unique among class I isoforms—enabling effective therapies with reduced systemic toxicity compared to non-selective inhibition.

Other names
p110δPIK3CD
02

Mechanism of action

Selective inhibition of PI3Kδ

03

Biological functions

Signal transductionImmune cell developmentImmune cell functionCell proliferationCell survivalCell differentiationCell migrationPhosphoinositide phosphorylation
04

Disease associations

ImmunodeficiencyCancerHematological malignanciesLymphoproliferative disorders
05

Safety considerations

Off-target effects (though less than pan-PI3K inhibitors)Systemic toxicity
06

Interacting drugs

Idelalisib

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