The canine α1A-AR signals through:
Key functional differences from human α1A-AR include 12% divergence in extracellular loop sequences affecting ligand binding kinetics .
Cardioprotection: Recombinant dog α1A-AR models show mitigated post-infarction mortality by suppressing RIP kinase-dependent necroptosis .
Inotropic Effects: Mediates positive inotropy in left ventricular cardiomyocytes through PKCδ-GLUT1/4 signaling .
Used to test subtype-specific agonists/antagonists:
| Compound | Effect on Dog α1A-AR | EC50/IC50 |
|---|---|---|
| A61603 (agonist) | Full activation | 1.2 nM |
| Dabuzalgron | Partial agonism | 8.7 nM |
| Data extrapolated from murine/human studies |
STRING: 9615.ENSCAFP00000012820
UniGene: Cfa.3732