| 体外研究(In Vitro) |
MK571 (15 μM, 1 h) sodium markedly suppresses constitutive and Ag-stimulated S1P secretion from RBL-2H3 cells and mast cells, and inhibits Fluo-3 efflux.
Medlife has not independently confirmed the accuracy of these methods. They are for reference only.
Cell Viability Assay
| Cell Line: |
RBL-2H3 cells, human LAD2 mast cells |
| Concentration: |
15 μM |
| Incubation Time: |
1 h |
| Result: |
Inhibited S1P secretion by vector and SphK1 transfected RBL-2H3 cells, whereas it did not affect uptake and intracellular conversion of [3H]Sph to S1P. Inhibited Fluo-3 efflux, inhibited S1P export by LAD2 cells, and blocked Ag-stimulated release of S1P. |
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| 体内研究(In Vivo) |
MK-571 sodium (0-0.5 mg/kg, orally, once) produces dose-dependent inhibition of the duration of antigen-induced dyspnea in conscious sensitized rats treated with methysergide (3 μg/kg).
MK-571 sodium (0-1 mg/kg, orally, once) blocks LTD4- and Ascaris-induced bronchoconstriction in conscious squirrel monkeys.
MK-571 sodium (0-25 mg/kg, Orally, daily, for 2 more weeks) shows reversal of hypoxic pulmonary hypertension (PH), and protects mice from hypoxic PH.
Medlife has not independently confirmed the accuracy of these methods. They are for reference only.
| Animal Model: |
Hyperreactive rats (male and female, 200-400 g, pretreated intravenously with 3
μg/kg methysergide, 5 min before antigen chdlenge) |
| Dosage: |
0.5, 0.15, and 0.05 mg/kg |
| Administration: |
Orally, once, 1 or 4 h before challenge |
| Result: |
Produced dose-dependent inhibition of the duration of antigen-induced dyspnea, with ED50 values of 0.13 (95% confidence interval (CI), 0.03-0.62) and 0.11 (95% CI, 0.009-1.47) mg/kg, respectively. MK-571 was even more active when administered orally as a suspension in 1% Methocel (4 h pretreatment), with an ED50 of 0.068 (95% CI, 0.83-0.14) mg/kg. |
| Animal Model: |
Csnscisus squirrel msnkeys |
| Dosage: |
0.1, 0.5, and 1 mg/kg |
| Administration: |
Orally, once, 2 h prior to challenge with Ascaris antigen |
| Result: |
Produced significant inhibition of the bronchoconstriction at 0.5 mg/kg, produced significant inhibition of the increases in RL and decreases in Cdyn at 1 mg/kg. |
| Animal Model: |
FVB (Friend virus B-type) mice (Mrp4 and WT, 6 weeks old, exposed to chronic hypoxia (10% O2) in a ventilated chamber for 28 days) |
| Dosage: |
0, 5, and 25 mg/kg |
| Administration: |
Orally, daily, for 2 more weeks, maintain in hypoxic conditions |
| Result: |
Showed reversal of hypoxic pulmonary hypertension (PH), and mice were protected from hypoxic PH. MK-571-treated mice displayed lower RVSP and Fulton index and a decrease in the medial thickening of small pulmonary arteries and arterioles. |
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