- BQ-123
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- $80.00
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2026-09-10
- CAS:136553-81-6
- Purity: 99.22%
- Supply Ability: 10g
- BQ-123 SODIUM SALT
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- $7.00
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2020-02-14
- CAS: 136553-81-6
- Min. Order: 1KG
- Purity: 99%
- Supply Ability: 100kg
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| | BQ-123 Chemical Properties |
| Boiling point | 1053.6±65.0 °C(Predicted) | | density | 1.33±0.1 g/cm3(Predicted) | | storage temp. | -20°C | | solubility | Soluble to 0.40 mg/ml in sterile | | form | lyophilized powder | | pka | 4.04±0.10(Predicted) | | color | White to off-white | | Water Solubility | Soluble in water (0.4 mg/ml) | | Sequence | Cyclo(d-Asp-Pro-d-Val-Leu-d-Trp) |
| Safety Statements | 22-24/25 | | WGK Germany | 3 | | Storage Class | 11 - Combustible Solids |
| | BQ-123 Usage And Synthesis |
| Uses | BQ-123 has been used as a selective endothelin-A receptor antagonist to study its effects on tumor necrosis factor α (TNFα)-induced human airway smooth muscle cells (HASMCs) proliferation. It is also used as endothelin-A receptor antagonist to study its effects on TNFα-induced granulocyte–macrophage colony-stimulating factor (GM-CSF) expression. | | Definition | ChEBI: BQ 123 is a cyclic peptide. | | Biological Activity | bq-123 is a potent and selective antagonist of eta endothelin receptor with ki values of 1.4 and 1500 nm for eta and etb receptors, respectively.endothelin receptor is a g protein-coupled receptor. eta receptor increases intracellular-free ca2+. also, activation of eta receptor increases vasoconstriction and blood pressure.bq-123 is a selective eta receptor antagonist. in the eta-expressing cells, bq123 (10-6 m) inhibited endothelin-1 (et-1) (10-6 m)-induced [ca2+]i increase by 95% [1]. in rat vascular smooth muscle cells (vsmc), bq-123 inhibited et-1 receptor binding, cellular contraction, [ca2+ ]i mobilization, [3h]thymidine incorporation, map kinase activation and mtt reduction induced by et-1. however, bq-123 didn’t inhibit angiotensin ii (ang ii)- and arginine vasopressin (avp)-induced increases in map kinase activity and [ca2+]i mobilization [2].in spontaneously hypertensive rats (shr), renin hypertensive rats and normotensive rats, bq-123 (16 nm/kg/min) reduced mean arterial pressure in a dose-dependent way in shr. also, bq-123 lowered blood pressure in both renin hypertensive rats and normotensive rats [3]. in a kidney transplantation rat model with reperfusion injury, bq-123 prevented reperfusion injury and inhibited the synthesis and release of et-1,2 [4]. | | Biochem/physiol Actions | Selective ETA endothelin receptor antagonist. | | storage | -20°C | | references | [1]. sakamoto a, yanagisawa m, sawamura t, et al. distinct subdomains of human endothelin receptors determine their selectivity to endothelina-selective antagonist and endothelinb-selective agonists. j biol chem, 1993, 268(12): 8547-8553.
[2]. guo x, okada k, fujita n, et al. inhibitory effect of bq-123 on endothelin-1-stimulated mitogen-activated protein kinase and cell growth of rat vascular smooth muscle cells. hypertens res, 1996, 19(1): 23-30.
[3]. douglas sa, gellai m, ezekiel m, et al. bq-123, a selective endothelin subtype a-receptor antagonist, lowers blood pressure in different rat models of hypertension. j hypertens, 1994, 12(5): 561-567.
[4]. büyükgebiz o, aktan ao, haklar g, et al. bq-123, a specific endothelin (eta) receptor antagonist, prevents ischemia-reperfusion injury in kidney transplantation. transpl int, 1996, 9(3): 201-207. |
| | BQ-123 Preparation Products And Raw materials |
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