5-Lipoxygenase Inhibitors: Synthesis and Structure−Activity Relationships of a Series of 1-Aryl-2H,4H-tetrahydro-1,2,4-triazin-3-ones
摘要:
Synthetic routes were developed to access a variety of novel 1-aryl-2H,4H-tetrahydro-1,2,4-triazin-3-one analogs which were evaluated as 5-lipoxygenase (5-LO) inhibitors. The parent structure, 1-phenylperhydro-1,2,4-triazin-3-one (4), was found to be a selective inhibitor of 5-LO in broken cell, intact cell, and human blood assays with IC50 values of 5-21 mu M. In a rat anaphylaxis model, 4 blocked leukotriene formation with an ED(50) = 7 mg/kg when administered orally. Compound 4 exhibited selectivity for inhibition of 5-LO with little activity against related enzymes: 12-LO from human platelets, 15-LO from soybean, and cyclooxygenase (COX) from sheep seminal vesicle. In pilot subacute toxicity testing, 4 did not produce methemoglobinemia in rats (400 mg/kg po daily for 9 days) or in dogs (200 mg/kg po daily for 28 days). These results indicated that the triazinone structure provided a 5-LO inhibitor template devoid of the toxicity problems observed in the related phenidone (1) and pyridazinone (3) classes of 5-LO inhibitors. The parent compound 4 is a selective, orally bioavailable 5-LO inhibitor which can serve as a useful reference standard for in vivo pharmacological studies involving leukotriene-mediated phenonmena.
5-Lipoxygenase Inhibitors: Synthesis and Structure−Activity Relationships of a Series of 1-Aryl-2H,4H-tetrahydro-1,2,4-triazin-3-ones
摘要:
Synthetic routes were developed to access a variety of novel 1-aryl-2H,4H-tetrahydro-1,2,4-triazin-3-one analogs which were evaluated as 5-lipoxygenase (5-LO) inhibitors. The parent structure, 1-phenylperhydro-1,2,4-triazin-3-one (4), was found to be a selective inhibitor of 5-LO in broken cell, intact cell, and human blood assays with IC50 values of 5-21 mu M. In a rat anaphylaxis model, 4 blocked leukotriene formation with an ED(50) = 7 mg/kg when administered orally. Compound 4 exhibited selectivity for inhibition of 5-LO with little activity against related enzymes: 12-LO from human platelets, 15-LO from soybean, and cyclooxygenase (COX) from sheep seminal vesicle. In pilot subacute toxicity testing, 4 did not produce methemoglobinemia in rats (400 mg/kg po daily for 9 days) or in dogs (200 mg/kg po daily for 28 days). These results indicated that the triazinone structure provided a 5-LO inhibitor template devoid of the toxicity problems observed in the related phenidone (1) and pyridazinone (3) classes of 5-LO inhibitors. The parent compound 4 is a selective, orally bioavailable 5-LO inhibitor which can serve as a useful reference standard for in vivo pharmacological studies involving leukotriene-mediated phenonmena.
constitute essential molecular units that are found in natural products, in medicinal chemistry, in materials, catalysis, and so on. This work discloses a robust method to access original cyclic amidrazones as new scaffold within an uncharted chemical space.
Use of Ltb4 Inhibitors for the Treatment of B-Cell Leukemias and Lymphomas
申请人:Claesson Hans-Erik
公开号:US20080081835A1
公开(公告)日:2008-04-03
The invention relates to the use of an inhibitor of the biosynthesis and/or function of LTB
4
for the manufacture of a medicament for the treatment of B-cell chronic lymphocytic leukemia (B-CLL), B-prolymphocytic leukemia (B-PLL) or B-cell lymphoma. Preferably, the inhibitor of the biosynthesis and/or function of LTB
4
is the inhibitor of 5-LO BWA4C or the inhibitor of FLAP MK-886.
Method and composition for treating inflammatory disorders
申请人:Pereswetoff-Morath Lena
公开号:US20090220583A1
公开(公告)日:2009-09-03
There is provided homogeneous pharmaceutical compositions for the treatment of inflammatory disorders comprising an antiinflammatory and/or antihistaminic active ingredient, a polar lipid liposome and a pharmaceutically-acceptable aqueous carrier.
Method and Composition for Treating Inflammatory Disorders
申请人:Meda AB
公开号:US20160166508A1
公开(公告)日:2016-06-16
There is provided homogeneous pharmaceutical compositions for the treatment of inflammatory disorders comprising an antiinflammatory and/or antihistaminic active ingredient, a polar lipid liposome and a pharmaceutically-acceptable aqueous carrier.