Target intelligence / Profile preview

Activator protein 1 (AP-1) transcription factor (AP-1)

Target
AP-1
Molecular classification
Transcription factor, Protein complex
01

Overview

Activator protein 1 (AP-1) is a dimeric transcription factor complex composed mainly of proteins from the Fos, Jun, ATF, and JDP families. It regulates gene expression in response to various stimuli, including cytokines, growth factors, stress, and pathogens. AP-1 controls crucial cellular processes such as proliferation, differentiation, apoptosis, and senescence. Dysregulation of AP-1 activity is implicated in cancer, inflammation, and other diseases, making it an attractive but challenging therapeutic target. Several small-molecule and natural compound inhibitors of AP-1 have been identified, but clinical efficacy remains unproven due to the complexity and ubiquity of AP-1 signaling[1][2][4][5][6].

Other names
Activating protein-1AP-1AP1
02

Mechanism of action

Inhibition of DNA binding by AP-1; Suppression of c-Fos and c-Jun expression or activity; Prevention of dimerization between AP-1 subunits; Blockade of AP-1-dependent transcription of target genes

03

Biological functions

Regulation of gene expressionSignal transductionCell proliferationCell differentiationApoptosis (cell death)Cellular senescenceImmune responseTissue regeneration
04

Disease associations

CancerInflammationCardiovascular diseaseInfectionNeurodegenerative disease
05

Safety considerations

Potential for broad effects due to AP-1’s role in many physiological pathways, raising concern for off-target toxicityRisk of impaired tissue regeneration or wound healingPossible immunosuppression (due to AP-1’s regulation of immune responses)Lack of target specificity with currently available small molecule inhibitors
06

Interacting drugs

Curcumin

5 more in the full profile.

07

Biomarkers

c-Fos expressionc-Jun expressionPhosphorylated c-Jun (p-c-Jun)AP-1-dependent mRNA levels

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