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Target intelligence / Profile preview
Notch3 receptor (NOTCH3)
- Target
- NOTCH3
- Molecular classification
- Receptor, Single-pass transmembrane receptor, Signaling receptor
01
Overview
The Notch3 receptor is a single-pass transmembrane receptor of the Notch signaling family that plays a crucial role in regulating the development and fate of various cell lineages, particularly in the nervous and vascular systems. In neural crest cells, activation of Notch3 signaling directs the differentiation into mural cell and smooth muscle lineages during embryogenesis and tissue repair. Canonical NOTCH signaling involves ligand-mediated cleavage, nuclear translocation of the NOTCH3 intracellular domain, and transcriptional activation of target genes. Dysregulation of Notch3 signaling has been implicated in several disease processes, including CADASIL (an inherited vascular dementia), vascular malformations, and multiple cancer types where it can regulate cancer stemness and proliferation[1][3][4][5][6].
- Other names
- Notch homolog 3Notch-3hNotch3
02
Mechanism of action
Inhibition of receptor activation (gamma-secretase inhibitors block release of NOTCH3 intracellular domain) Antibody-mediated receptor blockade
03
Biological functions
Cell differentiationDevelopmental patterningCell fate determinationSmooth muscle formationVascular developmentNeural crest cell proliferation
04
Disease associations
CancerNeurodegenerative disease (e.g., CADASIL)Cardiovascular disease (e.g., arterial and vascular malformations)
05
Safety considerations
On-target toxicity (due to broad NOTCH pathway’s critical roles in many tissues)Vascular toxicity (risk from interfering with vascular cell differentiation)Cancer stem cell persistence (inhibition could affect normal stem cells)
06
Interacting drugs
Gamma-secretase inhibitors (class; no direct FDA-approved drugs specifically and selectively for NOTCH3 as of 2025)
1 more in the full profile.
07
Biomarkers
NOTCH3 expression (mRNA, protein)NOTCH3 target gene expression (e.g., HEYL, HES1, RGS5, FOXS1)
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