Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
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Synthesis, Docking Studies, Pharmacological Activity and Toxicity of a Novel Pyrazole Derivative (LQFM 021)—Possible Effects on Phosphodiesterase
Daniella Ramos MartinsFrancine PaziniVinícius de Medeiros AlvesSoraya Santana de MouraLuciano Morais LiãoMariana Torquato Quezado de MagalhãesMarize Campos ValadaresCarolina Horta AndradeRicardo MenegattiMatheus Lavorenti Rocha
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2013 Volume 61 Issue 5 Pages 524-531


This study describes the synthetic route and molecular computational docking of LQFM 021, as well as examines its biological effects and toxicity. The docking studies revealed strong interaction of LQFM 021 to phosphodiesterase-3 (PDE-3). In isolated arteries, the presence of endothelium potentiates the relaxation for LQFM 021 and the inhibition cyclic nucleotides reduced the relaxation. Pre-contraction with KCl (45 mm), the treatment with tetraethylammonium (TEA) (5 mm) and inhibition of reticular Ca2+-ATPase showed an inhibitory effect on relaxation. Moreover, the compound reduced the contraction evoked by the Ca2+ influx. Acute toxicity tests revealed that the compound was practically nontoxic. In conclusion, this study showed that a new synthetic derivative of pyrazole is a possible PDE-3 inhibitor and has vasorelaxant activity and low toxicity.

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© 2013 The Pharmaceutical Society of Japan
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