- Pyrazole derivatives as inhibitors of arachidonic acid-induced platelet aggregation
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Antiplatelet drugs are promising therapeutics to intervene with platelet aggregation in arterial thrombosis, most prominently in myocardial infarction and ischemic stroke. Here, we describe the synthesis and structure-activity relationships of potent inhibitors of platelet aggregation based on the 1,5-diarylpyrazol-3-carboxamide scaffold. Analogs from this series demonstrated potent anti-aggregatory activities against arachidonic acid-induced platelet aggregation, as measured by turbidimetric method of Born. 1,5-Diarylpyrazole-3- carboxamides obtained with small-basic amines (7, 8, 50, 51, 61, 62) displayed the strongest activity with IC50 values in low nanomolar range (5.7-83 nM). On the basis of their high potency in cellular environment, these straightforward pyrazole derivatives may possess potential in the design of more potent compounds for intervention with cardiovascular diseases.
- Levent, Serkan,?ali?kan, Burcu,?ift?i, Murat,?zkan, Ye?im,Yenicesu, Idil,ünver, Hüseyin,Banoglu, Erden
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- Synthesis of 1,5-diarylpyrazol-3-propanoic acids towards inhibition of cyclooxygenase-1/2 activity and 5-lipoxygenase-mediated LTB4 formation
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A set of 25 derivatives of 3-[1-(6-substituted-pyridazin-3-yl)-5-(4- substitutedphenyl)-1H-pyrazol-3-yl]propanoic acids has been synthesized and evaluated for their in vitro cyclooxygenase-1/2 (COX-1/ 2) inhibitory activity using assays with purified COX-1 and COX-2 enzymes as well as for their 5-lipoxygenase (5-LO)-mediated LTB4 formation inhibitory activity using an assay with activated human polymorphonuclear leukocytes (PMNL). Among the synthesized compounds, especially 4g showed COX-1 (IC50 = 1.5 μM) and COX-2 (IC50 = 1.6 μM) inhibitory activity, whereas compounds 4b and 4 f resulted in the inhibition of 5-LO-mediated LTB4 formation at 14 μM and 12 μM IC50 values, respectively, without any significant inhibition on COX isoforms. ECV · Editio Cantor Verlag.
- Erguen, Burcu Caliskan,Nunez, Maria Teresa,Labeaga, Luis,Ledo, Francisco,Darlington, Janice,Bain, Gretchen,Cakir, Bilge,Banoglu, Erden
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p. 497 - 505
(2011/05/09)
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- Pharmacologically active N-1 and C-5 heterocyclic pyrazoles and method for synthesizing the same
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N-1 and C-5 heterocyclic pyrazoles, a method of their preparation, compositions containing the same and methods of their use are disclosed. The pyrazoles are useful in alleviating inflammatory and cardiovascular disorders in mammals.
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