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Target intelligence / Profile preview
Thromboxane A2 receptor TPβ (TPβ)
- Target
- TPβ
- Molecular classification
- G protein-coupled receptor, Receptor
01
Overview
The Thromboxane A2 receptor TPβ is a G protein-coupled receptor involved in platelet aggregation and vasoconstriction. It is one of two isoforms, TPα and TPβ, with TPβ having a longer C-terminal tail that influences receptor internalization and desensitization. TPβ is expressed in endothelial cells and plays a role in cardiovascular diseases by mediating thromboxane A2 (TXA2) effects, which are crucial in hemostasis and pathogenesis of cardiovascular disorders. Despite its potential as a therapeutic target, developing effective drugs for TPβ remains challenging due to efficacy and toxicity issues.
- Other names
- Prostanoid TP receptorTPβ isoform
02
Mechanism of action
Activation of Gq, Gi, and Gs proteins, leading to vasoconstriction and platelet aggregation; potential drugs may inhibit these pathways to prevent thrombotic events.
03
Biological functions
Signal transductionPlatelet aggregationVasoconstrictionCell proliferation
04
Disease associations
Cardiovascular diseaseThrombotic disorders
05
Safety considerations
Potential for increased bleeding risk if G-protein coupled signaling is too strongly inhibitedreduced efficacy and increased toxicity in some experimental drugs.
06
Interacting drugs
Aspirin (indirectly by inhibiting TXA2 synthesis)
1 more in the full profile.
07
Biomarkers
None specifically identified for TPβ, but TXA2 metabolites like 11-dehydrothromboxane B2 are used as indirect markers.
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