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- Alomone Labs IRL-1620 activates Endothelin B receptor-mediated Ca2+ mobilization in CHO-K1-mt Aequorin cells.Dose-response curve of normalized activation of Endothelin B receptor-mediated Ca2+ mobilization, evoked by IRL-1620 (#SPE-220). Ca2+ response was detected by measuring aequorin-derived fluorescence following application of IRL-1620 and Endothelin-1 at different concentrations. The EC50 measured for IRL-1620 is 1.53 nM.
- Bell, K.M. et al. (1999) Int. J. Cancer 80, 295.
- Xie, C. and Wang, D.H. (2009) Hypertension 54, 1298.
- Davenport, A.P. et al. (2016) Pharmacol. Rev. 68, 357.
IRL-1620 is a synthetic peptide that acts as a selective and potent ET-B (endothelin B) receptor agonist, a receptor belonging to the G-protein coupled receptors (GPCR) superfamily. IRL-1620 is a C-terminal linear peptide analog of endothelin (ET-1) with a structure that is based on the carboxy-terminal end of ET-1. IRL-1620 has the ability to produce vasodilation or vasoconstriction1.
Endothelin 1 (ET-1) and its receptor ET-B play an important role in regulating renal function and blood pressure. ET-B receptor and ET-1 are both expressed in sensory nerves. They are mainly present in medium- and large-sized cell bodies of human trigeminal ganglia2.
Studies have shown that acute administration of an ET-B receptor agonist into the rat renal medulla leads to natriuresis and diuresis via a mechanism that is NOS1-dependent3.
IRL-1620 (#SPE-220) is a highly pure, synthetic, and biologically active peptide.
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