Zamicastat

Research use only, not for human use.

Zamicastat is an inhibitor of dopamine β-hydroxylase (DBH).

Zamicastat is an inhibitor of dopamine β-hydroxylase (DBH), and is also a concentration-dependent dual inhibitor of P-gp and BCRP(IC50 values of 73.8 μM and 17.0 μM, respectively).

Following 4 hours of incubation (5, 10, 20, 50, 80, 100 μM), a significant loss of cell viability is verified with 100 μM Zamicastat (p=0.010) in MDCK-BCRP cells. No significant losses of cell viability are observed after 4 h of incubation for other concentrations in all cell lines. By decreasing the incubation period to 30 min, there is no significant loss of cell viability (p>0.05) at 100 μM in all cell lines. Cell Viability Assay Cell Line:MDCK II, MDCK-MDR1 and MDCK-BCRP cells Concentration:5, 10, 20, 50, 80, 100 μΜ Incubation Time:4 hours (5, 10, 20, 50, 80, 100 μM) or 30 min (only 100 μM)Result:A significant loss of cell viability was verified with 100 μM in MDCK-BCRP cells.

Zamicastat (10, 30 and 100 mg/kg/day; oral bolus, 7 days) is tested acutely against salt-induced hypertension in the Dahl SS rat. Zamicastat produces a dose-dependent decrease in blood pressure. 24 h after Zamicastat administration mean systolic blood pressure (SBP) decrease is -12.6±4.1 mm Hg (P=0.0284), -15.2±2.7 mm Hg (P=0.0026) and -19.0±3.7 mm Hg (P=0.0036) for the 10, 30, and 100 mg/kg body weight dose, respectively. Zamicastat administration also produces a significant 24-h average decrease in diastolic blood pressure (DBP) of - 14.6±3.4 mm Hg (P=0.0073) with 10 mg/kg body weight dose, -13.0±4.5 mm Hg (P=0.0347) with 30 mg/kg body weight dose and -15.0±3.1 mm Hg (P=0.0046) with 100 mg/kg body weight dose. Zamicastat administration leads to a decrease in the 24h post-dose mean arterial pressure (MAP) of -13.4±3.8 mm Hg (P=0.0162), -14.0±3.5 mm Hg (P=0.0101) and -20.6±3.7 mm Hg (P=0.0026) for the 10, 30, and 100 mg/kg body weight dose, respectively. There is a small, but significant, effect of Zamicastat on the 24-h mean heart rate (HR) post-dose for all tested doses (10 mg/kg: -19.1±3.2 beats/min, P=0.0019; 30 mg/kg: -13.0±4.5 beats/min, P=0.0347; 100 mg/kg: -21.6±6.6 beats/min, P=0.0235). Animal Model:Six-week-old male inbred male Dahl SS rats Dosage:10, 30, or 100 mg/kg; 4 mL/kg Administration:Oral bolus, daily, seven days Result:Treatment produced a dose-dependent decrease in blood pressure. Twenty four hours after administration mean SBP decrease was -12.6±4.1 mm Hg (P=0.0284), -15.2±2.7 mm Hg (P=0.0026) and -19.0±3.7 mm Hg (P=0.0036) for the 10, 30, and 100 mg/kg body weight dose, respectively.Animal Model:ten-week-old male Wistar Han rats Dosage:30 mg/kg/day Administration: in animal feedings (mixed in meal rodent food) everyday Result:lead to a significant 51% decrease in noradrenaline levels excreted in urine

BIA 5-1058

Immunology/Inflammation

Hydroxylase

BCRP|Dopamine β-hydroxylase|P-gp

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1080028-80-3

401.47

C21H21F2N3OS

>98% (HPLC)

DMSO:150 mg/mL (373.63 mM; Need ultrasonic)

Fc(cc1F)cc(C2)c1OC[C@@H]2N(C(CCNCc1ccccc1)=CN1)C1=S

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(-20℃)

With Ice Pack

≥ 2 years